DATA PROBLEM REPORT DMCQC2006:0329 2006/05/31 IRIS DMC Mary Templeton DMC PD11 IM ??? 2004,159,10:53:00 2004,232,04:55:00 Problem Description OTHER R-quality data contains many segments where the amplitudes appear as ~268,500,000-count boxcar functions. These segments respresent gaps that have been filled with an amplitude value larger possible by a 24-bit digitizer. They were introduced to improve telemetry throughput. Data for this time period with quality flag D does not contain these fill values. END PROBLEM RESOLUTION REPORT DMCQC2006:0329 2006/05/31 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION On 2004,232, data collection software was reconfigured not to fill gaps. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:0325 2006/05/31 IRIS DMC Mary Templeton DMC PD07 IM ??? 2004,159,10:53:00 2004,232,04:55:00 Problem Description OTHER R-quality data contains many segments where the amplitudes appear as ~268,500,000-count boxcar functions. These segments respresent gaps that have been filled with an amplitude value larger possible by a 24-bit digitizer. They were introduced to improve telemetry throughput. Data for this time period with quality flag D does not contain these fill values. END PROBLEM RESOLUTION REPORT DMCQC2006:0325 2006/05/31 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION On 2004,232, data collection software was reconfigured not to fill gaps. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:0326 2006/05/31 IRIS DMC Mary Templeton DMC PD08 IM ??? 2004,159,10:53:00 2004,232,04:55:00 Problem Description OTHER R-quality data contains many segments where the amplitudes appear as ~268,500,000-count boxcar functions. These segments respresent gaps that have been filled with an amplitude value larger possible by a 24-bit digitizer. They were introduced to improve telemetry throughput. Data for this time period with quality flag D does not contain these fill values. END PROBLEM RESOLUTION REPORT DMCQC2006:0326 2006/05/31 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION On 2004,232, data collection software was reconfigured not to fill gaps. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:0327 2006/05/31 IRIS DMC Mary Templeton DMC PD09 IM ??? 2004,159,10:53:00 2004,232,04:55:00 Problem Description OTHER R-quality data contains many segments where the amplitudes appear as ~268,500,000-count boxcar functions. These segments respresent gaps that have been filled with an amplitude value larger possible by a 24-bit digitizer. They were introduced to improve telemetry throughput. Data for this time period with quality flag D does not contain these fill values. END PROBLEM RESOLUTION REPORT DMCQC2006:0327 2006/05/31 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION On 2004,232, data collection software was reconfigured not to fill gaps. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:0328 2006/05/31 IRIS DMC Mary Templeton DMC PD10 IM ??? 2004,159,10:53:00 2004,232,04:55:00 Problem Description OTHER R-quality data contains many segments where the amplitudes appear as ~268,500,000-count boxcar functions. These segments respresent gaps that have been filled with an amplitude value larger possible by a 24-bit digitizer. They were introduced to improve telemetry throughput. Data for this time period with quality flag D does not contain these fill values. END PROBLEM RESOLUTION REPORT DMCQC2006:0328 2006/05/31 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION On 2004,232, data collection software was reconfigured not to fill gaps. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:0321 2006/05/31 IRIS DMC Mary Templeton DMC PD03 IM ??? 2004,159,10:53:00 2004,232,04:55:00 Problem Description OTHER R-quality data contains many segments where the amplitudes appear as ~268,500,000-count boxcar functions. These segments respresent gaps that have been filled with an amplitude value larger possible by a 24-bit digitizer. They were introduced to improve telemetry throughput. Data for this time period with quality flag D does not contain these fill values. END PROBLEM RESOLUTION REPORT DMCQC2006:0321 2006/05/31 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION On 2004,232, data collection software was reconfigured not to fill gaps. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:0322 2006/05/31 IRIS DMC Mary Templeton DMC PD04 IM ??? 2004,159,10:53:00 2004,232,04:55:00 Problem Description OTHER R-quality data contains many segments where the amplitudes appear as ~268,500,000-count boxcar functions. These segments respresent gaps that have been filled with an amplitude value larger possible by a 24-bit digitizer. They were introduced to improve telemetry throughput. Data for this time period with quality flag D does not contain these fill values. END PROBLEM RESOLUTION REPORT DMCQC2006:0322 2006/05/31 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION On 2004,232, data collection software was reconfigured not to fill gaps. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:0323 2006/05/31 IRIS DMC Mary Templeton DMC PD05 IM ??? 2004,159,10:53:00 2004,232,04:55:00 Problem Description OTHER R-quality data contains many segments where the amplitudes appear as ~268,500,000-count boxcar functions. These segments respresent gaps that have been filled with an amplitude value larger possible by a 24-bit digitizer. They were introduced to improve telemetry throughput. Data for this time period with quality flag D does not contain these fill values. END PROBLEM RESOLUTION REPORT DMCQC2006:0323 2006/05/31 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION On 2004,232, data collection software was reconfigured not to fill gaps. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:0324 2006/05/31 IRIS DMC Mary Templeton DMC PD06 IM ??? 2004,159,10:53:00 2004,232,04:55:00 Problem Description OTHER R-quality data contains many segments where the amplitudes appear as ~268,500,000-count boxcar functions. These segments respresent gaps that have been filled with an amplitude value larger possible by a 24-bit digitizer. They were introduced to improve telemetry throughput. Data for this time period with quality flag D does not contain these fill values. END PROBLEM RESOLUTION REPORT DMCQC2006:0324 2006/05/31 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION On 2004,232, data collection software was reconfigured not to fill gaps. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:0320 2006/05/31 IRIS DMC Mary Templeton DMC PD02 IM ??? 2004,159,10:53:00 2004,232,04:55:00 Problem Description OTHER R-quality data contains many segments where the amplitudes appear as ~268,500,000-count boxcar functions. These segments respresent gaps that have been filled with an amplitude value larger possible by a 24-bit digitizer. They were introduced to improve telemetry throughput. Data for this time period with quality flag D does not contain these fill values. END PROBLEM RESOLUTION REPORT DMCQC2006:0320 2006/05/31 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION On 2004,232, data collection software was reconfigured not to fill gaps. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:0336 2006/05/31 IRIS DMC Mary Templeton DMC NV03 IM ??? 2004,159,16:09:00 2004,231,23:09:00 Problem Description OTHER R-quality data contains many segments where the amplitudes appear as ~268,500,000-count boxcar functions. These segments respresent gaps that have been filled with an amplitude value larger possible by a 24-bit digitizer. They were introduced to improve telemetry throughput. Data for this time period with quality flag D does not contain these fill values. END PROBLEM RESOLUTION REPORT DMCQC2006:0336 2006/05/31 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION On 2004,232, data collection software was reconfigured not to fill gaps. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:0337 2006/05/31 IRIS DMC Mary Templeton DMC NV04 IM ??? 2004,159,16:09:00 2004,231,23:09:00 Problem Description OTHER R-quality data contains many segments where the amplitudes appear as ~268,500,000-count boxcar functions. These segments respresent gaps that have been filled with an amplitude value larger possible by a 24-bit digitizer. They were introduced to improve telemetry throughput. Data for this time period with quality flag D does not contain these fill values. END PROBLEM RESOLUTION REPORT DMCQC2006:0337 2006/05/31 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION On 2004,232, data collection software was reconfigured not to fill gaps. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:0338 2006/05/31 IRIS DMC Mary Templeton DMC NV05 IM ??? 2004,159,16:09:00 2004,231,23:09:00 Problem Description OTHER R-quality data contains many segments where the amplitudes appear as ~268,500,000-count boxcar functions. These segments respresent gaps that have been filled with an amplitude value larger possible by a 24-bit digitizer. They were introduced to improve telemetry throughput. Data for this time period with quality flag D does not contain these fill values. END PROBLEM RESOLUTION REPORT DMCQC2006:0338 2006/05/31 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION On 2004,232, data collection software was reconfigured not to fill gaps. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:0339 2006/05/31 IRIS DMC Mary Templeton DMC NV06 IM ??? 2004,159,16:09:00 2004,231,23:09:00 Problem Description OTHER R-quality data contains many segments where the amplitudes appear as ~268,500,000-count boxcar functions. These segments respresent gaps that have been filled with an amplitude value larger possible by a 24-bit digitizer. They were introduced to improve telemetry throughput. Data for this time period with quality flag D does not contain these fill values. END PROBLEM RESOLUTION REPORT DMCQC2006:0339 2006/05/31 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION On 2004,232, data collection software was reconfigured not to fill gaps. END **************************************************************************** DATA PROBLEM REPORT ASL2011:001 2011/06/23 ASL DCC Tyler Storm ASL KMBO IU 00/?H1 2011,130,00:00:00 2011,130,00:00:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4625 Invalid instrument response. The H1 STS-1 at KMBO has a lowered response. At this point I'm not sure if this is the amplitude dependent moisture issue we have seen in the past. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:0332 2006/05/31 IRIS DMC Mary Templeton DMC PD32 IM ??? 2004,159,10:53:00 2004,232,04:55:00 Problem Description OTHER R-quality data contains many segments where the amplitudes appear as ~268,500,000-count boxcar functions. These segments respresent gaps that have been filled with an amplitude value larger possible by a 24-bit digitizer. They were introduced to improve telemetry throughput. Data for this time period with quality flag D does not contain these fill values. END PROBLEM RESOLUTION REPORT DMCQC2006:0332 2006/05/31 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION On 2004,232, data collection software was reconfigured not to fill gaps. END **************************************************************************** DATA PROBLEM REPORT ASL2003:221 2003/12/08 ASL DCC Tyler Storm ASL SPA IU 00/?HE 2003,339,23:48:00 2003,351,00:18:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4625 Invalid instrument response. The E/W component of the STS-1 lost half of its double-ended output. The shape of the response curve is correct, but the amplitude is anywhere from 10dB to 30dB too quiet. END PROBLEM RESOLUTION REPORT ASL2003:221 2003/12/19 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION Instrument was removed. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:0333 2006/05/31 IRIS DMC Mary Templeton DMC NV32 IM ??? 2004,159,16:09:00 2004,231,23:09:00 Problem Description OTHER R-quality data contains many segments where the amplitudes appear as ~268,500,000-count boxcar functions. These segments respresent gaps that have been filled with an amplitude value larger possible by a 24-bit digitizer. They were introduced to improve telemetry throughput. Data for this time period with quality flag D does not contain these fill values. END PROBLEM RESOLUTION REPORT DMCQC2006:0333 2006/05/31 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION On 2004,232, data collection software was reconfigured not to fill gaps. END **************************************************************************** DATA PROBLEM REPORT ASL2003:222 2003/12/18 ASL DCC Tyler Storm ASL QSPA IU */* 2003,349,00:00:00 2004,029,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE S 110 TEST DATA: Calibration, and testing in progress. An ASL field team is currently on location at QSPA. Data quality and availability may be erratic. In addition, calibrations and other tests should be expected. END PROBLEM RESOLUTION REPORT ASL2003:222 2004/02/27 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The ASL field team left QSPA in fantastic operating condition on 2004, 029. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:0334 2006/05/31 IRIS DMC Mary Templeton DMC NV01 IM ??? 2004,159,16:09:00 2004,231,23:09:00 Problem Description OTHER R-quality data contains many segments where the amplitudes appear as ~268,500,000-count boxcar functions. These segments respresent gaps that have been filled with an amplitude value larger possible by a 24-bit digitizer. They were introduced to improve telemetry throughput. Data for this time period with quality flag D does not contain these fill values. END PROBLEM RESOLUTION REPORT DMCQC2006:0334 2006/05/31 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION On 2004,232, data collection software was reconfigured not to fill gaps. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:0335 2006/05/31 IRIS DMC Mary Templeton DMC NV02 IM ??? 2004,159,16:09:00 2004,231,23:09:00 Problem Description OTHER R-quality data contains many segments where the amplitudes appear as ~268,500,000-count boxcar functions. These segments respresent gaps that have been filled with an amplitude value larger possible by a 24-bit digitizer. They were introduced to improve telemetry throughput. Data for this time period with quality flag D does not contain these fill values. END PROBLEM RESOLUTION REPORT DMCQC2006:0335 2006/05/31 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION On 2004,232, data collection software was reconfigured not to fill gaps. END **************************************************************************** DATA PROBLEM REPORT ASL2003:220 2003/12/05 ASL DCC Tyler Storm ASL PAB IU 00/?HZ 2003,292,04:15:00 2003,356,10:30:00 Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE C 4420 Channel data quality is fair. High noise levels due to the bell jar containing the vertical instrument loosing vacuum. END PROBLEM RESOLUTION REPORT ASL2003:220 2004/02/17 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION Instrument was centered 2003,356,10:30:00. Data quality is back to normal. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:0330 2006/05/31 IRIS DMC Mary Templeton DMC PD12 IM ??? 2004,159,10:53:00 2004,232,04:55:00 Problem Description OTHER R-quality data contains many segments where the amplitudes appear as ~268,500,000-count boxcar functions. These segments respresent gaps that have been filled with an amplitude value larger possible by a 24-bit digitizer. They were introduced to improve telemetry throughput. Data for this time period with quality flag D does not contain these fill values. END PROBLEM RESOLUTION REPORT DMCQC2006:0330 2006/05/31 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION On 2004,232, data collection software was reconfigured not to fill gaps. END **************************************************************************** DATA PROBLEM REPORT ASL2003:223 2003/12/19 ASL DCC Tyler Storm ASL TEIG IU 10/* 2003,352,15:55:00 2003,356,18:44:26 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4410 Channel data quality is poor. All components have invalid response during this time frame. END PROBLEM RESOLUTION REPORT ASL2003:223 2003/12/22 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION Instrument reset fixed the problem. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:0331 2006/05/31 IRIS DMC Mary Templeton DMC PD13 IM ??? 2004,159,10:53:00 2004,232,04:55:00 Problem Description OTHER R-quality data contains many segments where the amplitudes appear as ~268,500,000-count boxcar functions. These segments respresent gaps that have been filled with an amplitude value larger possible by a 24-bit digitizer. They were introduced to improve telemetry throughput. Data for this time period with quality flag D does not contain these fill values. END PROBLEM RESOLUTION REPORT DMCQC2006:0331 2006/05/31 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION On 2004,232, data collection software was reconfigured not to fill gaps. END **************************************************************************** DATA PROBLEM REPORT ASL2003:224 2003/12/19 ASL DCC Tyler Storm ASL GNI IU * 2003,352,13:00:00 2003,353,14:58:00 Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE C 4410 Channel data quality is poor. Data are very noisy due to the operator being in the vault working on a system problem. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:0347 2006/06/01 IRIS DMC Mary Templeton DMC JCT US ??? 2006,130,20:33:00 2006,132,19:53:00 Problem Description DATA GLITCHES Frequent gaps and acausal spikes due to repeated digitizer reboots. This behavior is caused by current fluctuations. END PROBLEM RESOLUTION REPORT DMCQC2006:0347 2006/06/01 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION Power quality improved 2006,132. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:0348 2006/06/02 IRIS DMC Mary Templeton DMC MVCO US LH? 2006,118,20:20:00 2006,151,08:09:00 Problem Description DATA DROPOUTS Raw (quality flag R) LH data contains semi-regular gaps related to post-processing software. END PROBLEM RESOLUTION REPORT DMCQC2006:0348 2006/06/02 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION Software appears to have been reconfigured to eliminate these gaps for the LH stream. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:0349 2006/06/02 IRIS DMC Mary Templeton DMC MVCO US LH? 2006,118,18:09:00 2006,152,00:00:00 Problem Description INCORRECT TIME LH data with quality control flag R frequently lags the BH stream by an integer number of seconds due to inclusion of repeated samples. The extra samples are the result of a post-processing step. END PROBLEM RESOLUTION REPORT DMCQC2006:0349 2006/06/02 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION The post-processing step was corrected 2006,152 and no longer inserts extra samples. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:0343 2006/05/31 IRIS DMC Mary Templeton DMC NV10 IM ??? 2004,159,16:09:00 2004,231,23:09:00 Problem Description OTHER R-quality data contains many segments where the amplitudes appear as ~268,500,000-count boxcar functions. These segments respresent gaps that have been filled with an amplitude value larger possible by a 24-bit digitizer. They were introduced to improve telemetry throughput. Data for this time period with quality flag D does not contain these fill values. END PROBLEM RESOLUTION REPORT DMCQC2006:0343 2006/05/31 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION On 2004,232, data collection software was reconfigured not to fill gaps. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:0344 2006/05/31 IRIS DMC Mary Templeton DMC NV11 IM ??? 2004,159,16:09:00 2004,231,23:09:00 Problem Description OTHER R-quality data contains many segments where the amplitudes appear as ~268,500,000-count boxcar functions. These segments respresent gaps that have been filled with an amplitude value larger possible by a 24-bit digitizer. They were introduced to improve telemetry throughput. Data for this time period with quality flag D does not contain these fill values. END PROBLEM RESOLUTION REPORT DMCQC2006:0344 2006/05/31 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION On 2004,232, data collection software was reconfigured not to fill gaps. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:0345 2006/05/31 IRIS DMC Mary Templeton DMC NV31 IM ??? 2004,159,16:09:00 2004,231,23:09:00 Problem Description OTHER R-quality data contains many segments where the amplitudes appear as ~268,500,000-count boxcar functions. These segments respresent gaps that have been filled with an amplitude value larger possible by a 24-bit digitizer. They were introduced to improve telemetry throughput. Data for this time period with quality flag D does not contain these fill values. END PROBLEM RESOLUTION REPORT DMCQC2006:0345 2006/05/31 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION On 2004,232, data collection software was reconfigured not to fill gaps. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:0346 2006/05/31 IRIS DMC Mary Templeton DMC NV33 IM ??? 2004,159,16:09:00 2004,231,23:09:00 Problem Description OTHER R-quality data contains many segments where the amplitudes appear as ~268,500,000-count boxcar functions. These segments respresent gaps that have been filled with an amplitude value larger possible by a 24-bit digitizer. They were introduced to improve telemetry throughput. Data for this time period with quality flag D does not contain these fill values. END PROBLEM RESOLUTION REPORT DMCQC2006:0346 2006/05/31 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION On 2004,232, data collection software was reconfigured not to fill gaps. END **************************************************************************** DATA PROBLEM REPORT IDA1999:010 1999/12/27 IDA DCC Peter Davis IDA NIL II BHN,LHN,VHN 1999,142,00:00:00 1999,250,05:09:00 Problem Description DATA LOGGER PROBLEM Data acquisition from the KS-54000 NS channels was corrupted by problems with the RT303 board within the Mk7 data logger's DSP at NIL during the above period. The problems were severe enough to render all data from NIL unprocessable from 1999,147-22:23 -- 1999,181-10:28. When the board was replaced on 1999,250, operation returned to normal. END **************************************************************************** DATA PROBLEM REPORT IDA1999:011 1999/12/27 IDA DCC Peter Davis IDA MSEY II SHE,SLE 1999,185,10:48:00 1999,185,10:48:00 Problem Description DEAD CHANNEL Data acquisition from the CMG-3T EW channels ceased on the above date. The problem is believed to lie within the seismometer package, which is located down a posthole. Correction will be deferred until a future site maintenance visit. END PROBLEM RESOLUTION REPORT IDA1999:011 2003/06/23 IDA Erik Klimczak Description of Problem Resolution RESOLUTION BHE-10 data at MSEY was restored after the CMG3-T sensor was replaced by field engineers. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:0340 2006/05/31 IRIS DMC Mary Templeton DMC NV07 IM ??? 2004,159,16:09:00 2004,231,23:09:00 Problem Description OTHER R-quality data contains many segments where the amplitudes appear as ~268,500,000-count boxcar functions. These segments respresent gaps that have been filled with an amplitude value larger possible by a 24-bit digitizer. They were introduced to improve telemetry throughput. Data for this time period with quality flag D does not contain these fill values. END PROBLEM RESOLUTION REPORT DMCQC2006:0340 2006/05/31 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION On 2004,232, data collection software was reconfigured not to fill gaps. END **************************************************************************** DATA PROBLEM REPORT IDA1999:012 1999/12/27 IDA DCC Peter Davis IDA KWAJ II BHE,LHE,VHE 1999,320,19:28:00 1999,320,19:28:00 Problem Description INVALID RESPONSE IDA field engineers had difficulty setting the free period of the STS1-EW sensor at installation. The response of the instrument is only know to within +/- 5%, not the usual +/- 1%. This estimate of the response will be refined after further study. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:0341 2006/05/31 IRIS DMC Mary Templeton DMC NV08 IM ??? 2004,159,16:09:00 2004,231,23:09:00 Problem Description OTHER R-quality data contains many segments where the amplitudes appear as ~268,500,000-count boxcar functions. These segments respresent gaps that have been filled with an amplitude value larger possible by a 24-bit digitizer. They were introduced to improve telemetry throughput. Data for this time period with quality flag D does not contain these fill values. END PROBLEM RESOLUTION REPORT DMCQC2006:0341 2006/05/31 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION On 2004,232, data collection software was reconfigured not to fill gaps. END **************************************************************************** DATA PROBLEM REPORT IDA1999:013 1999/12/27 IDA DCC Peter Davis IDA ERM II * 1999,322,04:18:00 1999,353,01:00:00 Problem Description DATA LOGGER PROBLEM Data acquisition from the DAS was lost due to a blown fuse in the vault power supply. The fuse was replaced on the above date and data flow, restored. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:0342 2006/05/31 IRIS DMC Mary Templeton DMC NV09 IM ??? 2004,159,16:09:00 2004,231,23:09:00 Problem Description OTHER R-quality data contains many segments where the amplitudes appear as ~268,500,000-count boxcar functions. These segments respresent gaps that have been filled with an amplitude value larger possible by a 24-bit digitizer. They were introduced to improve telemetry throughput. Data for this time period with quality flag D does not contain these fill values. END PROBLEM RESOLUTION REPORT DMCQC2006:0342 2006/05/31 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION On 2004,232, data collection software was reconfigured not to fill gaps. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:0358 2006/07/18 IRIS DMC Mary Templeton DMC NV32 IM BH? 2003,308,13:03:00 2004,006,00:17:00 Problem Description DATA GLITCHES NV32 data contains numerous high amplitude glitches and other noise, possibly related to telemetry. END PROBLEM RESOLUTION REPORT DMCQC2006:0358 2006/07/18 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION Data glitches ceased for unknown reasons. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:0359 2006/07/18 IRIS DMC Peggy Johnson DMC R05C TA BH? LH? 2006,013,00:00:00 2006,177,23:59:00 Problem Description DATA DROPOUTS Since approximately January 2006, station/sensor plagued with power, noise, and comms problems, and finally a flooded vault which is likely when the sensor went bad (see Service Report of May 23, 2006). END PROBLEM RESOLUTION REPORT DMCQC2006:0359 2006/07/18 IRIS DMC Peggy Johnson Description of Problem Resolution RESOLUTION Site visit of June 26, 2006 -- replaced sensor: removed a Guralp CMG-T30-0016. installed a Guralp CMG-T30-0016. END **************************************************************************** DATA PROBLEM REPORT IDA1999:004 1999/07/09 IDA DCC Peter Davis IDA RPN II BHE,LHE,VHE 1999,053,16:33:00 1999,053,16:33:00 Problem Description DEAD CHANNEL Data from the EW STS-1 failed on this date. Diagnosis of the problem is ongoing, but resolution may await the upgrade of the station in Q4, 1999. END PROBLEM RESOLUTION REPORT IDA1999:004 1999/07/14 IDA Peter Davis Description of Problem Resolution RESOLUTION The dc->dc converter was replaced on 1999,171. The data from the STS1-EW channels appear normal beginning 1999,171-15:15. END **************************************************************************** DATA PROBLEM REPORT IDA1999:005 1999/07/09 IDA DCC Peter Davis IDA KDAK II *** 1999,007,00:20:00 1999,177,03:24:00 Problem Description DATA LOGGER PROBLEM A number of elements of the thermoelectric generator that powers the station failed during this past spring. As a consequence, the station experienced sporadic periods during which there was insufficient power to operate the sensors and recording equipment. Complete data loss occurred during the following periods: 1999,007-00:20 -- 1999,021-20:57 1999,037-23:11 -- 1999,042-17:31 1999,056-21:37 -- 1999,075-21:07 1999,085-03:52 -- 1999,097-00:07 1999,099-09:21 -- 1999,102-17:23 1999,115-05:30 -- 1999,144-01:29 1999,148-21:38 -- 1999,177-03:24 The thermoelectric generator was replaced on 1999,177 and the station appears to be operating normally now. END **************************************************************************** DATA PROBLEM REPORT IDA1999:006 1999/07/09 IDA DCC Peter Davis IDA RAYN II *** 1999,142,10:18:00 1999,142,10:18:00 Problem Description INCORRECT TIME The GPS clock failed on the above date. A replacement will be sent to the station shortly. END **************************************************************************** DATA PROBLEM REPORT IDA1999:007 1999/08/02 IDA DCC Peter Davis IDA BFO II BHN,LHN,VHN 1999,186,19:07:20 1999,186,19:07:20 Problem Description INVALID RESPONSE The RT303 board governing digitization of the STS1-NS seismometer was damaged during a thunderstorm on the above date. The exact nature of the damage to the data logger is still being analyzed, but judging from the waveforms recorded, the problem manifests itself as an apparent change in gain. We will advise when the problem has been corrected. END PROBLEM RESOLUTION REPORT IDA1999:007 1999/09/16 IDA Peter Davis Description of Problem Resolution RESOLUTION The RT303 board was replaced on 1999,235 and began functioning properly at 1999,235-12:36. END **************************************************************************** DATA PROBLEM REPORT IDA1999:008 1999/09/30 IDA DCC Peter Davis IDA NRIL II EH*,EL* 1992,352,00:00:00 1999,212,06:55:00 Problem Description POLARITY REVERSED Polarity was reversed on all channels from the GS-13 short period seismometers at this site over the above period. END **************************************************************************** DATA PROBLEM REPORT IDA1999:009 1999/12/27 IDA DCC Peter Davis IDA COCO II EH*,SH* 1998,310,00:00:00 1999,279,04:00:00 Problem Description DATA LOGGER PROBLEM Data acquisition from the STS-2 and CMG-3T seismometers was lost intermittently from 1998,310--1998,324-20:00 when it was lost completely. After several aborted attempts, data flow was restored on 1999,279-04:00 when a faulty DSP board was replaced. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:0354 2006/06/28 IRIS DMC Mary Templeton DMC ATTU IM ?H? 2006,178,02:40:00 2006,178,02:41:00 Problem Description OTHER Recording was swamped by Mw=6.2 Rat Islands event near the station. All channels show clipping. END PROBLEM RESOLUTION REPORT DMCQC2006:0354 2006/06/28 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION ATTU records with fidelity in the absence of large nearby events. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:0355 2006/07/07 IRIS DMC Mary Templeton DMC TX32 IM BHE 2006,157,03:10:00 2006,181,08:12:00 Problem Description DATA LOGGER PROBLEM TX32 began showing increasingly frequent glitches and boxcar function DC shifts accompanied by acausal side lobes indicating an electrical problem in the datalogger ahead of the fir filters. END PROBLEM RESOLUTION REPORT DMCQC2006:0355 2006/07/07 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION Datalogger was replaced on 2006,181. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:0356 2006/07/12 IRIS DMC Mary Templeton DMC NV31 IM BH? 2003,356,19:17:00 2003,356,19:21:00 Problem Description OTHER Recording was swamped by a Mw=6.6 Central California earthquake. Broadband channels show clipping. END PROBLEM RESOLUTION REPORT DMCQC2006:0356 2006/07/12 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION NV31 records with fidelity in the absence of large nearby events. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:0357 2006/07/18 IRIS DMC Mary Templeton DMC ATTU IM * 2003,321,06:44:00 2003,321,06:56:00 Problem Description OTHER The broadband and short period sensors were swamped during a local Mw=7.7 Rat Islands event near ATTU. During the strongest arrivals, the broadband KS54000 (BH?) channels show many segments of zero and clipped amplitudes interspersed with high amplitude values. The short period (SHZ) instrument is clipped. END PROBLEM RESOLUTION REPORT DMCQC2006:0357 2006/07/18 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION ATTU records with fidelity in the absence of large nearby events. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:0350 2006/06/22 IRIS DMC Mary Templeton DMC ATTU IM ?H? 2006,145,16:58:00 2006,171,13:52:00 Problem Description DEAD CHANNEL All channels have zero amplitude from 2006,145,16:58 through 2006,123,23:59. ATTU underwent a CD1.1 upgrade and went down entirely from 2006,163,23:59 through 2006,171,13:52. END PROBLEM RESOLUTION REPORT DMCQC2006:0350 2006/06/22 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION ATTU resumed sending non-zero amplitudes 2006,171,13:52 after the CD1.1 upgrade was completed. END **************************************************************************** DATA PROBLEM REPORT IDA1999:001 1999/01/15 IDA DCC Peter Davis IDA ESK II *** 1998,282,12:52:00 1998,335,15:11:00 Problem Description INCORRECT TIME The GPS clock failed at ESK on 1998,244-15:00. The data could be timed to millisecond accuracy until 1998,282:12:52 by extrapolating known clock drift. At the latter date, the data logger was reset. >From 1998,282-12:52 until 1998:335-15:11, the timing of the data is estimated accurate only to +/- 2 seconds. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:0352 2006/06/23 IRIS DMC Mary Templeton DMC TX02 IM SHZ 2006,159,15:29:00 2006,173,14:15:00 Problem Description OTHER TX02 showed large DC shifts indicating hardware failure, followed by a station outage from 2006,159,19:11 through 2006,173,14:15 END PROBLEM RESOLUTION REPORT DMCQC2006:0352 2006/06/23 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION TX02 resumed sending data at 2006,173,14:15. END **************************************************************************** DATA PROBLEM REPORT IDA1999:002 1999/05/17 IDA DCC Peter Davis IDA ABKT II BHN,BHE,LHN,LHE,VHN,VHE 1999,051,00:00:00 1999,051,00:00:00 Problem Description POLARITY REVERSED Following upgrade of the data logger at ABKT, the horizontal channels from the STS-1 broadband seismometers were found to have reversed polarity. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:0353 2006/06/28 IRIS DMC Peggy Johnson DMC K04A TA BH? LH? 2006,146,13:52:00 2006,175,22:16:00 Problem Description CHANNEL ORIENTATION Sensor misoriented, so that ?H{NE} components are opposite what they should be. 2006 5/26 (start of data) to 2006 6/24 22:10 ?HZ ch1 vertical ?HN ch2 N180E (south not north) ?HE ch3 N270E (west not east) Start of data for BH? is 2006-05-26 13:53:09 Start of data for LH? is 2006-05-26 13:52:52 END PROBLEM RESOLUTION REPORT DMCQC2006:0353 2006/06/28 IRIS DMC Peggy Johnson Description of Problem Resolution RESOLUTION Sensor reoriented to the following: 2006 6/24 22:16 to 2599 ?HZ ch1 vertical ?HN ch2 N0E (north) ?HE ch3 N90E (east) Metadata DATALESS.TA.2006.06.26 from ANF is updated (yet to be confirmed that it is done correctly). END **************************************************************************** DATA PROBLEM REPORT IDA1999:003 1999/07/09 IDA DCC Peter Davis IDA MSEY II BHE,LHE,VHE 1999,169,15:20:00 1999,169,15:20:00 Problem Description DEAD CHANNEL The RT303 board governing digitization of the EW KS54000-1 is believed to have failed on the above date. A replacement board will be shipped to the site shortly. END PROBLEM RESOLUTION REPORT IDA1999:003 1999/09/16 IDA Peter Davis Description of Problem Resolution COMMENT The RT303 board was replaced on 1999,221 but did not resolve the problem. The nature of the source of the problem is being analyzed further. END **************************************************************************** DATA PROBLEM REPORT DMCQC2012:0033 2012/07/27 IRIS DMC Gillian Sharer DMC 455A TA * 2012,182,19:00:00 2012,186,00:00:00 Problem Description DEAD CHANNEL On 06/30/2012, the sensor was pulled from TA.455A. The station returned digitizer noise during this time period. END PROBLEM RESOLUTION REPORT DMCQC2012:0033 2012/07/27 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION TA.455A resumed normal operation after a new sensor was installed at the site on 07/04/2012. END **************************************************************************** DATA PROBLEM REPORT DMCQC2012:0032 2012/07/27 IRIS DMC Gillian Sharer DMC 455A TA ?HZ 2012,151,21:22:00 2012,182,19:00:00 Problem Description OTHER On 05/30/2012, unusual noise appeared on the Z component of TA.455A. By 06/03/2012 the noise had increased in amplitude to the point where the channel was effectively non-seismic. On 06/07/2012, VM1 came up against the stops and stayed there. END PROBLEM RESOLUTION REPORT DMCQC2012:0032 2012/07/27 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The sensor was removed on 06/30/2012. END **************************************************************************** DATA PROBLEM REPORT DMCQC2012:0031 2012/07/27 IRIS DMC Gillian Sharer DMC 645A TA ?HZ 2012,158,07:04:00 2012,180,19:30:00 Problem Description OTHER On 06/06/2012, TA.645A.?HZ became non-seismic. The channel returned counts in the millions and ceased to record ground motion. END PROBLEM RESOLUTION REPORT DMCQC2012:0031 2012/07/27 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION On 06/28/2012, the sensor was replaced. END **************************************************************************** DATA PROBLEM REPORT DMCQC2012:0030 2012/07/27 IRIS DMC Gillian Sharer DMC 645A TA ?HZ 2011,206,19:09:00 2011,217,03:18:00 Problem Description OTHER On 07/25/2011, TA.645A.?HZ became non-seismic. The channel returned counts in the millions and ceased to record ground motion. END PROBLEM RESOLUTION REPORT DMCQC2012:0030 2012/07/27 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION On 08/05/2011, TA.645A.?HZ spontaneously resumed normal operation. END **************************************************************************** DATA PROBLEM REPORT DMCQC2012:0039 2012/11/12 IRIS DMC Gillian Sharer DMC V44A TA ?HN 2012,256,02:30:00 2012,307,17:45:00 Problem Description INVALID RESPONSE On 2012.256 ~02:30 UTC, V44A.?HN amplitudes decreased by about half accompanied by an increase in dc offset of ~2000 counts. END PROBLEM RESOLUTION REPORT DMCQC2012:0039 2012/11/12 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION V44A began recording normal amplitudes again after a sensor swap on 2012.307 ~17:45 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2012:0038 2012/11/11 IRIS DMC Gillian Sharer DMC TCOL TA * 2012,302,03:11:00 2012,302,03:19:00 Problem Description OTHER The gain on TA.TCOL was increased by 32db on 2012.302 02:49 UTC just prior to the 10/28/12 03:04 UTC Queen Charlotte Islands event, Mw 7.7. Waveforms on both TCOL sensors clipped. The gain was returned to normal on 2012.306 22:15 UTC. Metadata loaded on 11/02/2012 includes this epoch. END **************************************************************************** DATA PROBLEM REPORT DMCQC2012:0037 2012/08/31 IRIS DMC Peggy Johnson DMC L47A TA ?H? 2012,226,23:31:00 2012,244,04:00:00 Problem Description OTHER At 2012.223 1837 UTC, a lock/unlock was sent to clear up some noise issues on Z, which resulted in the N and Z components having spikes. By d 226, the noise on N had increased and N became aseismic. By d 227, VM1 was at -7.9 V. Another lock/unlock was sent d 228, however, the unlock failed and N remained aseismic. END PROBLEM RESOLUTION REPORT DMCQC2012:0037 2012/08/31 IRIS DMC Peggy Johnson Description of Problem Resolution RESOLUTION The sensor was replaced 2012.243 by 1440 UTC. After settling, the instrument was responding normally by 2012.244 0400 UTC END **************************************************************************** DATA PROBLEM REPORT DMCQC2012:0036 2012/08/31 IRIS DMC Peggy Johnson DMC O38A TA ?H? 2012,243,15:55:00 2012,244,13:33:00 Problem Description INVALID RESPONSE At the time the station was releveled and recentered on d 243, a jumper was installed and erroneously left in place, causing the sensor to record a 1-second response. END PROBLEM RESOLUTION REPORT DMCQC2012:0036 2012/08/31 IRIS DMC Peggy Johnson Description of Problem Resolution RESOLUTION At 2012.244 1333 UTC, the jumper was removed and normal frequency response resumed. END **************************************************************************** DATA PROBLEM REPORT DMCQC2012:0035 2012/08/31 IRIS DMC Peggy Johnson DMC O38A TA BH* LH* 2012,237,15:28:00 2012,243,15:55:00 Problem Description DATA DROPOUTS VM1 reached -12.7 V at 2012.237 15:28 UTC. Less than 3 hours later, at 18:16 UTC, all three seismic channels rapidly went aseismic. END PROBLEM RESOLUTION REPORT DMCQC2012:0035 2012/08/31 IRIS DMC Peggy Johnson Description of Problem Resolution RESOLUTION Normal functioning resumed on d 243 when the sensor was releveled and recentered on-site. This was completed by d 243 1555 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2012:0034 2012/07/27 IRIS DMC Gillian Sharer DMC T48A TA * 2012,184,17:52:00 2012,188,16:35:00 Problem Description OTHER The host box at TA.T48A failed on 2012/07/02 causing the station to return non-seismic noise. END PROBLEM RESOLUTION REPORT DMCQC2012:0034 2012/07/27 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION TA.T48A resumed normal operation after the host box was replaced on 07/06/2012. END **************************************************************************** DATA PROBLEM REPORT DMCQC2012:0022 2012/07/27 IRIS DMC Gillian Sharer DMC Z41A TA * 2012,147,13:00:00 2012,177,22:40:00 Problem Description DEAD CHANNEL TA.Z41A.VM2 started drifting rapidly on day 147 ~13:00 UTC and hit the stops by day 148. The sensor could not be re-leveled and was pulled from the site on day 153 17:34 UTC. The station returned digitizer noise until a new sensor was installed. END PROBLEM RESOLUTION REPORT DMCQC2012:0022 2012/07/27 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The station began recording data again on 06/22/2012 after the sensor was replaced. END **************************************************************************** DATA PROBLEM REPORT DMCQC2012:0021 2012/06/11 IRIS DMC Gillian Sharer DMC Y22E TA --/* 2012,081,15:59:00 2012,082,14:51:00 Problem Description DEAD CHANNELS Y22E loc code -- returned digitizer noise starting on day 81 15:59 UTC. END PROBLEM RESOLUTION REPORT DMCQC2012:0021 2012/06/11 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION Y22E loc -- returned to normal operation on day 82 14:51 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2012:0020 2012/06/11 IRIS DMC Gillian Sharer DMC Y22E TA --/* 2012,090,16:10:00 2012,090,16:10:00 Problem Description DEAD CHANNEL The sensor was removed from Y22E loc -- on 2012 day 90 16:10 UTC. Data is digitizer noise. END **************************************************************************** DATA PROBLEM REPORT DMCQC2012:0028 2012/07/09 IRIS DMC Peggy Johnson DMC A32A TA ?HE 2012,052,02:12:00 2012,055,17:52:00 Problem Description LOW FREQUENCY NOISE A32A.?HE exhibited sudden onset noise beginning on 2012.052. END PROBLEM RESOLUTION REPORT DMCQC2012:0028 2012/07/09 IRIS DMC Peggy Johnson Description of Problem Resolution RESOLUTION A lock/unlock returned the sensor to normal functioning. END **************************************************************************** DATA PROBLEM REPORT DMCQC2012:0027 2012/11/12 IRIS DMC Gillian Sharer DMC SNCC CI ?HN 2010,116,00:00:00 2012,213,18:00:00 Problem Description CHANNEL ORIENTATION The N channel of CI.SNCC has reversed polarity. END PROBLEM RESOLUTION REPORT DMCQC2012:0027 2012/11/12 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The sensor was removed on 2012.213 18:00 UTC and replaced with an STS2.5. The N reverse polarity was confirmed on site and the dataless at IRIS was updated with the correct orientation on 2012.215 11:00 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2012:0026 2012/06/15 IRIS DMC Gillian Sharer DMC SNCC CI ?HE 2012,149,03:50:00 2012,149,03:50:00 Problem Description OTHER VME approached the stops on 2012 day 149 ~03:50 UTC. The ?HE channel became non-seismic shortly after. END **************************************************************************** DATA PROBLEM REPORT DMCQC2012:0025 2012/06/01 IRIS DMC Gillian Sharer DMC Z43A TA ?HZ 2012,081,14:12:00 2012,149,15:23:00 Problem Description OTHER During this time period, Z43A.?HZ experienced several episodes of excessive noise which rendered the channel functionally non-seismic. The most notable episodes were from day81 14:12-d108 00:23 UTC, d128 11:11-20:38 UTC, d132 22:09-d143 05:52 UTC, and d145 4:16- d147 19:03 UTC. END PROBLEM RESOLUTION REPORT DMCQC2012:0025 2012/06/01 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The station resumed normal operation following a sensor swap on day 149 15:23 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2012:0024 2012/07/27 IRIS DMC Gillian Sharer DMC U53A TA * 2012,142,00:00:00 2012,164,19:33:00 Problem Description INCORRECT TIME The GPS clock at TA.U53A was not functional and the timing is unreliable. END PROBLEM RESOLUTION REPORT DMCQC2012:0024 2012/07/27 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION Timing was restored on 06/12/2012 after a service visit reconnected a loose cable. END **************************************************************************** DATA PROBLEM REPORT DMCQC2012:0023 2012/06/11 IRIS DMC Gillian Sharer DMC 245A TA ?HZ 2012,146,15:47:00 2012,152,16:44:00 Problem Description OTHER Beginning on day 146, TA.245A.?HZ experienced excessive noise during its solar charge cycle. The noise was on the order of 200000 counts from ~15:45 - 22:45 UTC daily and the channel was functionally non-seismic. The sensor was pulled from the site on day 151 19:35 UTC. END PROBLEM RESOLUTION REPORT DMCQC2012:0023 2012/06/11 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The station returned to normal operation after the sensor was replaced on day 152 16:44 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:0307 2006/05/31 IRIS DMC Mary Templeton DMC TX01 IM ??? 2004,159,10:57:00 2004,232,04:55:00 Problem Description OTHER R-quality data contains many segments where the amplitudes appear as ~268,500,000-count boxcar functions. These segments respresent gaps that have been filled with an amplitude value larger possible by a 24-bit digitizer. They were introduced to improve telemetry throughput. Data for this time period with quality flag D does not contain these fill values. END PROBLEM RESOLUTION REPORT DMCQC2006:0307 2006/05/31 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION On 2004,232, data collection software was reconfigured not to fill gaps. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:0308 2006/05/31 IRIS DMC Mary Templeton DMC TX02 IM ??? 2004,159,10:57:00 2004,232,04:55:00 Problem Description OTHER R-quality data contains many segments where the amplitudes appear as ~268,500,000-count boxcar functions. These segments respresent gaps that have been filled with an amplitude value larger possible by a 24-bit digitizer. They were introduced to improve telemetry throughput. Data for this time period with quality flag D does not contain these fill values. END PROBLEM RESOLUTION REPORT DMCQC2006:0308 2006/05/31 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION On 2004,232, data collection software was reconfigured not to fill gaps. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:0309 2006/05/31 IRIS DMC Mary Templeton DMC TX03 IM ??? 2004,159,10:57:00 2004,232,04:55:00 Problem Description OTHER R-quality data contains many segments where the amplitudes appear as ~268,500,000-count boxcar functions. These segments respresent gaps that have been filled with an amplitude value larger possible by a 24-bit digitizer. They were introduced to improve telemetry throughput. Data for this time period with quality flag D does not contain these fill values. END PROBLEM RESOLUTION REPORT DMCQC2006:0309 2006/05/31 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION On 2004,232, data collection software was reconfigured not to fill gaps. END **************************************************************************** DATA PROBLEM REPORT ASL2002:008 2002/02/19 ASL DCC Valerie Peyton ASL HKT IU 00/* 2002,050,20:12:00 2002,053,19:30:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The HKT STS1 channels are all down. The source of the problem is currently unknown. The station operator is working to rectify the situation. END PROBLEM RESOLUTION REPORT ASL2002:008 2002/03/19 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION The problems with the STS-1 instruments were resolved 2002,053,19:30. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:0303 2006/05/18 IRIS DMC Mary Templeton DMC MVCO US BH? 2006,118,20:20:00 2006,135,23:41:00 Problem Description DATA DROPOUTS Raw (quality flag R) BH data contains semi-regular gaps related to post-processing software. END PROBLEM RESOLUTION REPORT DMCQC2006:0303 2006/05/18 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION Software appears to have been reconfigured to eliminate these gaps for the BH stream. END **************************************************************************** DATA PROBLEM REPORT ASL2002:009 2002/02/25 ASL DCC Valerie Peyton ASL TSUM IU */* 2002,057,00:00:00 2002,060,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. One of our field engineers is on-site at TSUM performing station maintenance. Data quality will be variable during this time period. END PROBLEM RESOLUTION REPORT ASL2002:009 2002/03/14 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Our field engineer left TSUM in good operational condition on 2002, 060. Data quality returned normal. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:0304 2006/05/19 IRIS DMC Mary Templeton DMC ATTU IM BH? 2004,221,00:00:00 2005,029,23:28:00 Problem Description DATA GLITCHES Broadband (BH) data from ATTU show an excessive number of glitches during this time period, probably due to telemetry issues. END PROBLEM RESOLUTION REPORT DMCQC2006:0304 2006/05/19 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION Data glitches returned to normal levels for ATTU. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:0305 2006/05/23 IRIS DMC Mary Templeton DMC ATTU IM ?H? 2004,162,15:23:00 2004,162,15:24:00 Problem Description OTHER Recording was swamped by Mw=6.8 Kamchatka. Broadband channels show segments of zero amplitude interspersed with high amplitude values. The short period channel may be clipped. END PROBLEM RESOLUTION REPORT DMCQC2006:0305 2006/05/23 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION ATTU records with fidelity in the absence of large nearby events. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:0306 2006/05/31 IRIS DMC Mary Templeton DMC TX31 IM ??? 2004,159,10:57:00 2004,232,04:55:00 Problem Description OTHER R-quality data contains many segments where the amplitudes appear as ~268,500,000-count boxcar functions. These segments respresent gaps that have been filled with an amplitude value larger possible by a 24-bit digitizer. They were introduced to improve telemetry throughput. Data for this time period with quality flag D does not contain these fill values. END PROBLEM RESOLUTION REPORT DMCQC2006:0306 2006/05/31 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION On 2004,232, data collection software was reconfigured not to fill gaps. END **************************************************************************** DATA PROBLEM REPORT ASL2002:004 2002/01/24 ASL DCC Valerie Peyton ASL KOWA IU 10/*HN 10/*HZ 2001,068,19:48:00 2001,068,19:48:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. N/S and Z data from the CMG3-T at KOWA are unuseable. END **************************************************************************** DATA PROBLEM REPORT ASL2002:005 2002/01/25 ASL DCC Tyler Storm ASL FURI IU 00/?H? 2001,309,12:17:00 2001,320,11:36:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. All channels from the STS-1 instruments are dead during this time period. END PROBLEM RESOLUTION REPORT ASL2002:005 2002/01/25 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION The data are back to normal at 2001,320,11:36. END **************************************************************************** DATA PROBLEM REPORT ASL2002:006 2002/01/28 ASL DCC Valerie Peyton ASL SPA IU 10/*H* 2002,028,03:14:00 2002,028,14:43:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. All three channels of the CMG3-T at SPA need recentering. The N component is fully against one of its stops; the Z and E components are swiftly approaching one of their stops. END PROBLEM RESOLUTION REPORT ASL2002:006 2002/01/28 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION We were able to recenter the SPA CMG3-T remotely. Data quality returns to normal after roughly 11 hours of bad data. END **************************************************************************** DATA PROBLEM REPORT ASL2002:007 2002/02/06 ASL DCC Valerie Peyton ASL TIXI IU 00/*HZ 2002,033,11:24:00 2002,035,00:10:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The Z component of the STS1 at TIXI is dead; for some reason it is only recording digitizer noise. END PROBLEM RESOLUTION REPORT ASL2002:007 2002/02/06 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The Z component of the STS1 at TIXI was fixed roughly half a day after the problem began. The cause of the problem is unknown. Data quality returns to normal at 2002, 035, 00:10. END **************************************************************************** DATA PROBLEM REPORT ASL2002:000 2002/01/04 ASL DCC Valerie Peyton ASL SPA IU */* 2002,001,00:00:00 2002,018,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. Field engineers are on site for testing and maintenance. Data quality will be variable during this time period, and channels may periodically be dead or simply not available. END PROBLEM RESOLUTION REPORT ASL2002:000 2002/01/18 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Field engineers wrapped up maintenance and left SPA in fully operational condition on 2002,018. Data quality returns to normal. END **************************************************************************** DATA PROBLEM REPORT ASL2002:001 2002/01/07 ASL DCC Valerie Peyton ASL RCBR IU 10/*H1 2000,244,15:12:00 2002,260,19:27:00 Problem Description NOISE SEED COMMENT REFERENCE C 4500 Channel has high noise background. The 1 component (nominal N) of the CMG3-T-B at RCBR has high levels of low frequency noise. The source of the noise has not been determined, but we believe it is a problem with the component itself. The noise levels vary, but gradually worsen. By 2001, 351, 12 the low frequency noise begins at 0.19Hz and continues into all the lower frequencies. The noise amplitude is anywhere from 2 to 50dB above the background noise for the other two components of the instrument. At this time, a high frequency noise problem also develops: High frequency noise levels are 2 to 6dB higher than they should be in the 1Hz - 6Hz range. END PROBLEM RESOLUTION REPORT ASL2002:001 2002/09/19 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION An ASL maintenance team visited RCBR and was able to repair the CMG3-T-B on-site. The noise problem was caused by corroded mass keepers in the module. Data quality returns to normal at 2002, 260, 19:27. END **************************************************************************** DATA PROBLEM REPORT ASL2002:002 2002/01/18 ASL DCC Valerie Peyton ASL KONO IU 10/*HN 2002,017,00:56:00 2002,018,16:00:00 Problem Description OTHER SEED COMMENT REFERENCE C 4410 Channel data quality is poor. The N component of the CMG3-T at KONO is losing mass capture, and the response is degrading to the point that earthquakes are not properly resolved. END PROBLEM RESOLUTION REPORT ASL2002:002 2002/01/18 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION We were able to recenter the CMG3-T at KONO remotely. Data quality of the N component returns to normal at 2002, 018, 16:00. END **************************************************************************** DATA PROBLEM REPORT ASL2002:003 2002/01/22 ASL DCC Valerie Peyton ASL SPA IU 10/*HN 2002,020,01:33:00 2002,022,19:35:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The N component of the CMG3-T at SPA has fallen against one of the stops. Data are unuseable. END PROBLEM RESOLUTION REPORT ASL2002:003 2002/01/22 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION We were able to remotely recenter the CMG3-T at SPA. N data quality returns to normal at 2002,022,19:35. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:0300 2006/04/21 IRIS DMC Mary Templeton DMC ATTU IM * 2004,263,20:26:00 2004,263,20:27:00 Problem Description OTHER The broadband and short period sensors were swamped during a local Mw=6,6 event near the station. During the strongest arrivals, the broadband KS54000 (BH?) channels show many segments of zero amplitude interspersed with high amplitude values. The short period (SHZ) instrument is clipped. END PROBLEM RESOLUTION REPORT DMCQC2006:0300 2006/04/21 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION ATTU records with fidelity in the absence of large nearby events. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:0301 2006/05/11 IRIS DMC Mary Templeton DMC ATTU IM ?H? 2006,123,23:26:00 2006,127,12:22:00 Problem Description DEAD CHANNEL All ATTU channels have zero amplitude. END PROBLEM RESOLUTION REPORT DMCQC2006:0301 2006/05/11 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION ATTU channels resumed recording non-zero amplitudes between 2006,127,10:24 (BH) and 2006,127,12:22 (SHZ) UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:0302 2007/02/01 IRIS DMC Mary Templeton DMC NV32 IM * 2006,089,10:57:00 2006,089,10:57:00 Problem Description DEAD CHANNEL The sensor at NV32 appears to have failed on 2006,089 and was followed by a data outage. NV32 resumed sending data from 2006,129,22:06 through 2006,130,17:27, but the sensor appears off center based on the mean count value of the data and did not record useable data. A data outage resumed after this time. END PROBLEM RESOLUTION REPORT DMCQC2006:0302 2007/02/01 IRIS DMC Mary Templeton Description of Problem Resolution COMMENT NV32 resumed sending data at 2007,031,17:36, but the data only contains digitizer noise. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:0318 2006/05/31 IRIS DMC Mary Templeton DMC PD31 IM ??? 2004,159,10:53:00 2004,232,04:55:00 Problem Description OTHER R-quality data contains many segments where the amplitudes appear as ~268,500,000-count boxcar functions. These segments respresent gaps that have been filled with an amplitude value larger possible by a 24-bit digitizer. They were introduced to improve telemetry throughput. Data for this time period with quality flag D does not contain these fill values. END PROBLEM RESOLUTION REPORT DMCQC2006:0318 2006/05/31 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION On 2004,232, data collection software was reconfigured not to fill gaps. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:0319 2006/05/31 IRIS DMC Mary Templeton DMC PD01 IM ??? 2004,159,10:53:00 2004,232,04:55:00 Problem Description OTHER R-quality data contains many segments where the amplitudes appear as ~268,500,000-count boxcar functions. These segments respresent gaps that have been filled with an amplitude value larger possible by a 24-bit digitizer. They were introduced to improve telemetry throughput. Data for this time period with quality flag D does not contain these fill values. END PROBLEM RESOLUTION REPORT DMCQC2006:0319 2006/05/31 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION On 2004,232, data collection software was reconfigured not to fill gaps. END **************************************************************************** DATA PROBLEM REPORT ASL2002:019 2002/03/27 ASL DCC Valerie Peyton ASL YSS IU BHN LHN VHN UHN 1996,035,01:41:00 1996,035,08:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The north component of the STS1 at YSS has gone dead. END PROBLEM RESOLUTION REPORT ASL2002:019 2002/03/27 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The YSS station operator repaired the north component of the STS1 at 1996, 035, 08:00. Data quality returns to normal. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:0314 2006/05/31 IRIS DMC Mary Templeton DMC TX09 IM ??? 2004,159,10:57:00 2004,232,04:55:00 Problem Description OTHER R-quality data contains many segments where the amplitudes appear as ~268,500,000-count boxcar functions. These segments respresent gaps that have been filled with an amplitude value larger possible by a 24-bit digitizer. They were introduced to improve telemetry throughput. Data for this time period with quality flag D does not contain these fill values. END PROBLEM RESOLUTION REPORT DMCQC2006:0314 2006/05/31 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION On 2004,232, data collection software was reconfigured not to fill gaps. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:0315 2006/05/31 IRIS DMC Mary Templeton DMC TX10 IM ??? 2004,159,10:57:00 2004,232,04:55:00 Problem Description OTHER R-quality data contains many segments where the amplitudes appear as ~268,500,000-count boxcar functions. These segments respresent gaps that have been filled with an amplitude value larger possible by a 24-bit digitizer. They were introduced to improve telemetry throughput. Data for this time period with quality flag D does not contain these fill values. END PROBLEM RESOLUTION REPORT DMCQC2006:0315 2006/05/31 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION On 2004,232, data collection software was reconfigured not to fill gaps. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:0316 2006/05/31 IRIS DMC Mary Templeton DMC TX11 IM ??? 2004,159,10:57:00 2004,232,04:55:00 Problem Description OTHER R-quality data contains many segments where the amplitudes appear as ~268,500,000-count boxcar functions. These segments respresent gaps that have been filled with an amplitude value larger possible by a 24-bit digitizer. They were introduced to improve telemetry throughput. Data for this time period with quality flag D does not contain these fill values. END PROBLEM RESOLUTION REPORT DMCQC2006:0316 2006/05/31 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION On 2004,232, data collection software was reconfigured not to fill gaps. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:0317 2006/05/31 IRIS DMC Mary Templeton DMC TX32 IM ??? 2004,159,10:57:00 2004,232,04:55:00 Problem Description OTHER R-quality data contains many segments where the amplitudes appear as ~268,500,000-count boxcar functions. These segments respresent gaps that have been filled with an amplitude value larger possible by a 24-bit digitizer. They were introduced to improve telemetry throughput. Data for this time period with quality flag D does not contain these fill values. END PROBLEM RESOLUTION REPORT DMCQC2006:0317 2006/05/31 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION On 2004,232, data collection software was reconfigured not to fill gaps. END **************************************************************************** DATA PROBLEM REPORT ASL2002:015 2002/03/15 ASL DCC Tyler Storm ASL KBS IU 00/*HN 2001,362,08:58:00 2002,067,12:00:00 Problem Description NOISE SEED COMMENT REFERENCE C 4815 Channel has long period noise. The N/S STS-1 became extremely noisy at 2001,362,08:58. END PROBLEM RESOLUTION REPORT ASL2002:015 2002/03/15 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION We are calling the problem fixed since the noise level has returned to normal. Here is a time line of events. >From 2002,002 - 2002,004 We swapped various pieces of equipment in an effort to isolate the problem. No luck. 2002,004,12:30 The feedback electronic boxes were swapped from the N/S and E/W instruments and the noise disappeared. At this point it appeared the culprit must have been an intermitten problem with a connector. 2002,16,13:00 The feedback electronic boxes were swapped back to normal configuration and the noise problem returned. 2002,67,12:00 We changed back to the configuration where we have the N/S and E/W feedback electronic boxes swapped. As expected, the noise went away. There must be something quirky going on with how a pin seats correctly in one connector but not in the other. END **************************************************************************** DATA PROBLEM REPORT ASL2002:016 2002/03/18 ASL DCC Valerie Peyton ASL TIXI IU 00/*HZ 2002,076,18:56:00 2002,078,13:10:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The Z component of the STS1 at TIXI has lost mass capture. Data are unuseable. END PROBLEM RESOLUTION REPORT ASL2002:016 2002/03/18 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The TIXI station operator recentered the STS1 Z component. Data quality returns to normal at 2002, 078, 13:10. END **************************************************************************** DATA PROBLEM REPORT ASL2002:017 2002/03/25 ASL DCC Valerie Peyton ASL KMBO IU 10/* 2002,082,04:09:00 2003,014,11:02:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The STS2 at KMBO is producing raw digitizer noise right now. It looks a bit as if someone has unplugged the instrument. We are investigating the source of the problem. END PROBLEM RESOLUTION REPORT ASL2002:017 2003/10/02 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION There was a long data outage at KMBO. When the data returns at 2003, 014, 11:02, data quality returns to normal. END **************************************************************************** DATA PROBLEM REPORT DMCQC2012:0042 2012/12/14 IRIS DMC Gillian Sharer DMC 059Z TA ?HN 2012,275,13:25:00 2012,331,20:00:00 Problem Description OTHER TA.059Z.?HN began showing increasing noise starting on 2012.275 13:25 UTC. By 2012.277, TA.059Z.?HN was not recording seismic energy. VM2 stopped responding normally to mass recenters and was up against the stops during most of this time period. END PROBLEM RESOLUTION REPORT DMCQC2012:0042 2012/12/14 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION TA.059Z returned to normal operation after a sensor swap on 2012.331 20:00 UTC. END **************************************************************************** DATA PROBLEM REPORT ASL2002:018 2002/03/27 ASL DCC Valerie Peyton ASL YSS IU BHZ LHZ VHZ UHZ 1996,037,02:34:00 1996,040,06:27:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The vertical component of the STS1 at YSS has gone dead. END PROBLEM RESOLUTION REPORT ASL2002:018 2002/03/27 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The YSS station operator repaired the vertical component of the STS1 at 1996, 040, 06:27. Data quality returns to normal. END **************************************************************************** DATA PROBLEM REPORT ASL2002:011 2002/03/08 ASL DCC Valerie Peyton ASL TIXI IU 00/*HZ 2002,066,15:10:00 2002,071,10:16:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The Z component of the STS1 at TIXI has fallen against one of its stops. The station operator will recenter the instrument at the next available opportunity. Meanwhile, Z data are useless. END PROBLEM RESOLUTION REPORT ASL2002:011 2002/03/12 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The TIXI station operator recentered the STS1 Z. Data quality return to normal at 2002, 071, 10:16. END **************************************************************************** DATA PROBLEM REPORT DMCQC2012:0040 2012/11/29 IRIS DMC Peggy Johnson DMC D49A TA * 2012,314,00:00:00 2012,328,20:20:00 Problem Description OTHER Station has been aseismic since we first started receiving data d 314. END PROBLEM RESOLUTION REPORT DMCQC2012:0040 2012/11/29 IRIS DMC Peggy Johnson Description of Problem Resolution RESOLUTION TA.D49A resumed normal operation when the sensor was replaced on 11/28/2012 (d 328). END **************************************************************************** DATA PROBLEM REPORT ASL2002:012 2002/03/13 ASL DCC Valerie Peyton ASL BGCA GT SHZ 2002,087,10:52:00 2002,087,10:52:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The SHZ channel (GS21 instrument) at BGCA is producing digitizer noise. END **************************************************************************** DATA PROBLEM REPORT NEICQC2007:116AUMCQ 2007/04/26 NEIC Dan McNamara DMC MCQ AU BH* 2007,060,00:00:00 2007,115,00:00:00 Problem Description DATA DROPOUTS gain is too high. resulting in low corrected amplitudes. Refer to:http://www.iris.washington.edu/servlet/quackquery/budFileSelector.do?station=MCQ&network=AU END **************************************************************************** DATA PROBLEM REPORT ASL2002:013 2002/03/14 ASL DCC Valerie Peyton ASL MAJO IU */* 2002,069,00:00:00 2002,073,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. Field engineers are on-site at MAJO performing station maintenance. Tests, calibrations, and general data anomalies are expected. Data quality will be variable during this time period. END PROBLEM RESOLUTION REPORT ASL2002:013 2002/03/14 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Our field engineers left MAJO in good operational condition on 2002, 073. Data quality returned normal. END **************************************************************************** DATA PROBLEM REPORT ASL2002:014 2002/03/14 ASL DCC Valerie Peyton ASL INCN IU */* 2002,072,00:00:00 2002,081,22:30:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. Field engineers are on-site at INCN performing station maintenance. Tests, calibrations, and general data anomalies are expected. Data quality will be variable during this time period. END PROBLEM RESOLUTION REPORT ASL2002:014 2002/10/24 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Our ASL field engineers left INCN in great operational condition on 2002,081,22:30:00. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2002:010 2002/03/06 ASL DCC Valerie Peyton ASL KMBO IU */* 2002,059,10:10:00 2002,068,10:21:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. CTBTO field engineers are on-site performing station maintenance at KMBO. Data quality and availability will be erratic, and tests may be run. END PROBLEM RESOLUTION REPORT ASL2002:010 2002/05/01 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION We are not sure precisely when the CTBTO field engineers left KMBO. However, the data indicate that they likely were gone by 2002, 068, 10:21. Data quality returns to normal. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:0310 2006/05/31 IRIS DMC Mary Templeton DMC TX04 IM ??? 2004,159,10:57:00 2004,232,04:55:00 Problem Description OTHER R-quality data contains many segments where the amplitudes appear as ~268,500,000-count boxcar functions. These segments respresent gaps that have been filled with an amplitude value larger possible by a 24-bit digitizer. They were introduced to improve telemetry throughput. Data for this time period with quality flag D does not contain these fill values. END PROBLEM RESOLUTION REPORT DMCQC2006:0310 2006/05/31 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION On 2004,232, data collection software was reconfigured not to fill gaps. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:0311 2006/05/31 IRIS DMC Mary Templeton DMC TX06 IM ??? 2004,159,10:57:00 2004,232,04:55:00 Problem Description OTHER R-quality data contains many segments where the amplitudes appear as ~268,500,000-count boxcar functions. These segments respresent gaps that have been filled with an amplitude value larger possible by a 24-bit digitizer. They were introduced to improve telemetry throughput. Data for this time period with quality flag D does not contain these fill values. END PROBLEM RESOLUTION REPORT DMCQC2006:0311 2006/05/31 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION On 2004,232, data collection software was reconfigured not to fill gaps. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:0312 2006/05/31 IRIS DMC Mary Templeton DMC TX07 IM ??? 2004,159,10:57:00 2004,232,04:55:00 Problem Description OTHER R-quality data contains many segments where the amplitudes appear as ~268,500,000-count boxcar functions. These segments respresent gaps that have been filled with an amplitude value larger possible by a 24-bit digitizer. They were introduced to improve telemetry throughput. Data for this time period with quality flag D does not contain these fill values. END PROBLEM RESOLUTION REPORT DMCQC2006:0312 2006/05/31 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION On 2004,232, data collection software was reconfigured not to fill gaps. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:0313 2006/05/31 IRIS DMC Mary Templeton DMC TX08 IM ??? 2004,159,10:57:00 2004,232,04:55:00 Problem Description OTHER R-quality data contains many segments where the amplitudes appear as ~268,500,000-count boxcar functions. These segments respresent gaps that have been filled with an amplitude value larger possible by a 24-bit digitizer. They were introduced to improve telemetry throughput. Data for this time period with quality flag D does not contain these fill values. END PROBLEM RESOLUTION REPORT DMCQC2006:0313 2006/05/31 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION On 2004,232, data collection software was reconfigured not to fill gaps. END **************************************************************************** DATA PROBLEM REPORT ASL2002:026 2002/04/09 ASL DCC Valerie Peyton ASL RCBR IU 10/*H1 2002,093,20:26:00 2002,097,19:06:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. Something caused the 1 (nominal N) component of the CMG3-T-B at RCBR to fall against one of its stops. The operator will recenter the instrument at the earliest opportunity. END PROBLEM RESOLUTION REPORT ASL2002:026 2002/04/09 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Whatever caused the 1 component of the CMT3-T-B at RCBR to fall against a stop in the first place later caused the mass to recenter itself. We are not sure of the cause of the problem, but we are glad to see it is no longer present. END **************************************************************************** DATA PROBLEM REPORT ASL2002:027 2002/04/11 ASL DCC Valerie Peyton ASL OTAV IU 10/*HN 10/*HE 2002,098,19:30:00 2002,100,19:55:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The N and E components of the CMG3-T at OTAV have fallen against their stops. The data are unuseable. END PROBLEM RESOLUTION REPORT ASL2002:027 2002/04/11 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION We were able to remotely recenter the OTAV CMG3-T. Data quality returns to normal on 2002, 100, 19:55. END **************************************************************************** DATA PROBLEM REPORT ASL2002:028 2002/04/15 ASL DCC Valerie Peyton ASL BGCA GT *H* 2002,092,10:12:00 2002,107,13:25:00 Problem Description DATA GLITCHES SEED COMMENT REFERENCE C 4410 Channel data quality is poor. The KS54000 at BGCA is displaying a disappointingly large number of data glitches. The E and N components are most seriously affected, but the Z component displays the glitches as well. The glitches first appear in small sporadic clumps; about three days after their initial appearance, the glitches begin to appear almost continuously on the horizontals. Fortunately, large events are still fairly visible in the midst of all the glistches. The glitches have also caused the response of this instrument to become corrupted. Unfortunately, there is nothing we can do about this problem as we no longer maintain this station. When the situation improves, we will make a note to that effect. END PROBLEM RESOLUTION REPORT ASL2002:028 2002/04/18 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The glitches in the KS54000 data from BGCA have disappeared entirely. Rumor has it that the GT network digitizers are currently being upgraded. It was likely that the upgrade process first caused, then remedied, the problem. END **************************************************************************** DATA PROBLEM REPORT ASL2002:029 2002/04/17 ASL DCC Valerie Peyton ASL KBS IU 10/*H* 2002,094,15:40:00 2002,108,12:38:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4625 Invalid instrument response. The STS2 at KBS is producing seismic data with corrupt response. It looks like the instrument may have lost half of its double-ended output. Events are being recorded, but the response of the instrument is incorrect. END PROBLEM RESOLUTION REPORT ASL2002:029 2002/04/19 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION The problem degraded further when the station operator tried to reset the instrument. Now, all components are basically dead. END **************************************************************************** DATA PROBLEM REPORT ASL2002:022 2002/03/27 ASL DCC Valerie Peyton ASL FURI IU 10/*HE 2002,062,07:25:00 2002,106,17:48:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The E component of the CMG3-T at FURI has gone to digitizer noise. From the mass position data, it appears the mass has fallen against its stop. The data are unuseable. END PROBLEM RESOLUTION REPORT ASL2002:022 2003/05/02 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The FURI station operator recentered the CMG3-T at 2002, 106, 17:48. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2002:023 2002/03/29 ASL DCC Tyler Storm ASL LVC IU 10/?HN, 10/?HE 2002,087,04:57:00 2002,091,19:45:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. A close earthquake "pegged" the horizontals on the CMG3-T. END PROBLEM RESOLUTION REPORT ASL2002:023 2002/04/02 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The LVC station operator recentered the CMG3-T at 2002, 091 19:45. Data quality returns to normal. END **************************************************************************** DATA PROBLEM REPORT ASL2002:024 2002/04/01 ASL DCC Valerie Peyton ASL TATO IU */* 2002,081,22:30:00 2002,113,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. Field engineers from ASL are at TATO with the intention of replacing the KS36000 borehole seismometer with a KS54000, as well as performing any other necessary station maintenance. Once the new instrument has been installed, calibrations and other tests will be run. Data quality will be variable during this time frame. END PROBLEM RESOLUTION REPORT ASL2002:024 2002/04/26 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Our field engineer left TATO in excellent working condition on 2002, 113. In addition to replacing the old KS36000 with a new 54000, an STS2 was added to the station. END **************************************************************************** DATA PROBLEM REPORT ASL2002:025 2002/04/04 ASL DCC Valerie Peyton ASL KBS IU 10/* 2002,094,04:25:00 2002,094,15:40:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The STS2 at KBS is having problems. The data have gone to raw digitizer noise and glitches. We have asked the operator to look into the problem. Meanwhile, there is no useable data from the STS2. END PROBLEM RESOLUTION REPORT ASL2002:025 2002/04/16 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The STS2 at KBS stopped producing glitches at 2002, 094, 15:40. However, when the instrument came back, the response was corrupted. Please see ASL2002:029 for the next phase of the problem. END **************************************************************************** DATA PROBLEM REPORT ASL2002:020 2002/03/27 ASL DCC Valerie Peyton ASL YSS IU BHE LHE VHE UHE 1996,029,01:02:00 1996,033,02:42:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The east component of the STS1 at YSS has gone dead. END PROBLEM RESOLUTION REPORT ASL2002:020 2002/03/27 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The YSS station operator repaired the east component of the STS1 at 1996, 033, 02:42. Data quality returns to normal. END **************************************************************************** DATA PROBLEM REPORT ASL2002:021 2002/03/27 ASL DCC Valerie Peyton ASL YSS IU * 1996,029,00:50:00 1996,040,06:54:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. It appears that the station operator was performing station maintenance at YSS during this time period. Calibrations are run at different times on each channel more than once during this time. Data quality is variable. END PROBLEM RESOLUTION REPORT ASL2002:021 2002/03/27 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The YSS station operator finished his maintenance work at 1996, 040 06:54. Data quality returns to normal. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:157 2006/02/14 IRIS DMC Mary Templeton DMC TX32 IM BH? 2006,039,14:24:00 2006,100,15:26:00 Problem Description DATA DROPOUTS The TXAR array is down for a CD1.1 telemetry upgrade. END PROBLEM RESOLUTION REPORT DMCQC2006:157 2006/04/14 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION TX32 data transmission resumed 2006,100,15:26. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:156 2006/02/14 IRIS DMC Mary Templeton DMC TX31 IM BH? 2006,039,14:24:00 2006,100,15:26:00 Problem Description DATA DROPOUTS The TXAR array is down for a CD1.1 telemetry upgrade. END PROBLEM RESOLUTION REPORT DMCQC2006:156 2006/04/14 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION TX31 data transmission resumed 2006,100,15:26. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:155 2006/02/14 IRIS DMC Mary Templeton DMC TX11 IM SH? 2006,039,19:25:00 2006,100,15:26:00 Problem Description DATA DROPOUTS The TXAR array is down for a CD1.1 telemetry upgrade. END PROBLEM RESOLUTION REPORT DMCQC2006:155 2006/04/14 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION TX11 data transmission resumed 2006,100,15:26. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:154 2006/02/14 IRIS DMC Mary Templeton DMC TX10 IM SHZ 2006,040,14:15:00 2006,100,15:26:00 Problem Description DATA DROPOUTS The TXAR array is down for a CD1.1 telemetry upgrade. END PROBLEM RESOLUTION REPORT DMCQC2006:154 2006/04/14 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION TX10 data transmission resumed 2006,100,15:26. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:153 2006/02/14 IRIS DMC Mary Templeton DMC TX09 IM SHZ 2006,040,14:15:00 2006,100,15:26:00 Problem Description DATA DROPOUTS The TXAR array is down for a CD1.1 telemetry upgrade. END PROBLEM RESOLUTION REPORT DMCQC2006:153 2006/04/14 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION TX09 data transmission resumed 2006,100,15:26. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:152 2006/02/14 IRIS DMC Mary Templeton DMC TX08 IM SHZ 2006,040,14:15:00 2006,100,15:26:00 Problem Description DATA DROPOUTS The TXAR array is down for a CD1.1 telemetry upgrade. END PROBLEM RESOLUTION REPORT DMCQC2006:152 2006/04/14 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION TX08 data transmission resumed 2006,100,15:26. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:151 2006/02/14 IRIS DMC Mary Templeton DMC TX07 IM SHZ 2006,040,14:15:00 2006,100,15:26:00 Problem Description DATA DROPOUTS The TXAR array is down for a CD1.1 telemetry upgrade. END PROBLEM RESOLUTION REPORT DMCQC2006:151 2006/04/14 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION TX07 data transmission resumed 2006,100,15:26. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:150 2006/02/14 IRIS DMC Mary Templeton DMC TX06 IM SHZ 2006,040,14:15:00 2006,100,15:26:00 Problem Description DATA DROPOUTS The TXAR array is down for a CD1.1 telemetry upgrade. END PROBLEM RESOLUTION REPORT DMCQC2006:150 2006/04/14 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION TX06 data transmission resumed 2006,100,15:26. END **************************************************************************** DATA PROBLEM REPORT ASL2002:037 2002/05/06 ASL DCC Valerie Peyton ASL HIA IC 00/*HZ 2002,124,15:15:00 2002,132,21:40:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4620 Incorrect instrument response for low frequencies only The Z component of the STS1 at HIA has a response problem. It appears that the instrument has somehow begun sporadically to go into free period mode. The instrument response is corrupt from 0.1 Hz down on into all of the lower frequencies. END PROBLEM RESOLUTION REPORT ASL2002:037 2002/05/13 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION It turns out that the Z component of the STS1 at HIA was simultaneously in 20 second mode and in free-period mode. The instrument has been returned to 360 second mode. Data quality returns to normal at 2002, 132, 21:40. END **************************************************************************** DATA PROBLEM REPORT ASL2002:038 2002/05/08 ASL DCC Valerie Peyton ASL ANMO IU 10/*H2 2002,127,19:54:00 2002,128,18:40:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4625 Invalid instrument response. The 2 (nominal E) component of the CMG3-T-B at ANMO appears to have lost half of its double-ended output. As a result, the shape of the response curve is entirely correct, but the amplitude is roughly 4dB to 30dB quieter than it should be (the amplitude of response loss is frequency-dependant). With this corrupted response, the data should be used with caution. END PROBLEM RESOLUTION REPORT ASL2002:038 2002/05/08 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION ASL field engineers locked, unlocked and recentered the ANMO CMG3-T-B. This action cured the instrument of the response problem on the 2 component. Data quality returns to normal as of 2002, 128, 18:40. END **************************************************************************** DATA PROBLEM REPORT ASL2002:039 2002/05/13 ASL DCC Valerie Peyton ASL BGCA GT *H* 2002,131,09:51:00 2002,131,13:39:00 Problem Description SPIKES SEED COMMENT REFERENCE C 4525 Channel has spiking and other data glitches. The KS36000I borehole seismometer at BGCA displays spikes and electronic glitches during this 3 hour timeframe. The source of the spikes is unknown, but the spikes do mess up the record of the 5.6 event near the coast of Peru that arrived during the problem time. END PROBLEM RESOLUTION REPORT ASL2002:039 2002/05/13 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The spikes in BGCA data are gone after only three hours. Data quality returns to normal on 2002, 131, 13:39. END **************************************************************************** DATA PROBLEM REPORT ASL2002:033 2002/04/19 ASL DCC Tyler Storm ASL KBS IU 10/?H? 2002,108,12:38:00 2003,247,18:29:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. Data from the STS-2 are unuseable. END PROBLEM RESOLUTION REPORT ASL2002:033 2003/09/05 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION After extensive trials and many an error, the KBS STS2 has been replaced and appears to be working once again. Long period noise on the E component is currently rendering the E data almost useless. For the full extent of the problem on the E component, please see ASL2003:178. Aside from that, data quality returns to normal at 2003, 247, 18:29. END **************************************************************************** DATA PROBLEM REPORT ASL2002:034 2002/04/29 ASL DCC Valerie Peyton ASL LVC IU 10/*HN 10/*HE 2002,111,19:06:00 2002,124,01:49:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The horizontal components of the CMG3-T at LVC have fallen against their stops. Data are unuseable. END PROBLEM RESOLUTION REPORT ASL2002:034 2002/05/07 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The station operator at LVC recentered the CMG3-T. Data quality returns to normal on 2002, 124, 01:49. END **************************************************************************** DATA PROBLEM REPORT ASL2002:035 2002/04/29 ASL DCC Valerie Peyton ASL LVC IU 10/*HZ 2002,111,19:06:00 2002,124,01:49:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The vertical component of the CMG3-T at LVC has fallen against its stop. Data are unuseable. END PROBLEM RESOLUTION REPORT ASL2002:035 2002/05/07 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The station operator at LVC recentered the CMG3-T. Data quality returns to normal on 2002, 124, 01:49. END **************************************************************************** DATA PROBLEM REPORT ASL2002:036 2002/05/02 ASL DCC Tyler Storm ASL PAS TS * 2000,320,00:00:00 2000,347,03:03:00 Problem Description VERY LARGE PULSE SEED COMMENT REFERENCE C 4525 Channel has spiking and other data glitches. These data contain spikes with an amplitude of 2.68443E=08 counts/m/s. The frequency of the spiking on different channels varies with the sample rates. END PROBLEM RESOLUTION REPORT ASL2002:036 2007/01/24 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The massive spikes in the PAS data appear to have ended by 2000, 347, 03:03. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2002:030 2002/04/18 ASL DCC Tyler Storm ASL CASY IU 00/*HZ 2001,122,22:00:00 2001,124,11:35:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. Data are unuseable. END PROBLEM RESOLUTION REPORT ASL2002:030 2002/04/18 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION Data are useable again at 2001,124,11:35:00. END **************************************************************************** DATA PROBLEM REPORT ASL2002:031 2002/04/19 ASL DCC Tyler Storm ASL LVC IU 00/?H? 2002,108,21:30:00 2002,110,17:58:00 Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE C 4815 Channel has long period noise. STS-1 data are "somewhat" useable. There is a 360 second sine wave dominating the data on all three components. END PROBLEM RESOLUTION REPORT ASL2002:031 2002/04/25 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The STS-1 data from LVC returned to normal data quality on 2002, 110 at 17:58. We know neither the cause of, nor the solution to, the problem. END **************************************************************************** DATA PROBLEM REPORT ASL2002:032 2002/04/19 ASL DCC Tyler Storm ASL LVC IU 10/?HE 2002,108,21:44:00 2002,110,18:17:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. Instrument mass is "pegged". END PROBLEM RESOLUTION REPORT ASL2002:032 2002/04/29 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The CMG3-T at LVC was recentered at 2002, 110, 18:17. Data quality returns to normal. END **************************************************************************** DATA PROBLEM REPORT ASL2002:048 2002/06/05 ASL DCC Valerie Peyton ASL ULN IU */* 1999,047,05:50:00 2002,198,16:10:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 451 Timing MAY be in error, as clock is unlocked. The QVI master board at ULN appears to have gone bad on 1999, 047, 05:50. The problem was not immediately noticed or diagnosed, as the symptoms of a bad QVI master can be hard to spot. A replacement board has been sent to the station. END PROBLEM RESOLUTION REPORT ASL2002:048 2002/07/18 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The broken QVI master board at ULN has been replaced with a new one. Timing quality returns to normal at 2002, 198, 16:10. END **************************************************************************** DATA PROBLEM REPORT DMCQC2012:0011 2012/02/10 IRIS DMC Gillian Sharer DMC 109C TA ?HZ 2011,071,21:13:00 2011,101,01:59:00 Problem Description DATA GLITCHES During this time period, TA.109C.?HZ experienced noise/data glitches that effectively rendered the channel non-seismic. END PROBLEM RESOLUTION REPORT DMCQC2012:0011 2012/02/10 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The problem resolved itself spontaneously on 2011.101 01:59 UTC. END **************************************************************************** DATA PROBLEM REPORT ASL2002:049 2002/06/06 ASL DCC Valerie Peyton ASL MDJ IC 10/*H* 2002,157,04:06:00 2002,172,01:40:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. All three components of the STS2 at MDJ have gone to digitizer noise. We are not sure of the cause of the problem, but we are investigating. END PROBLEM RESOLUTION REPORT ASL2002:049 2002/06/24 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The hostbox on the STS2 at MDJ had failed. The replacement hostbox returns data quality to normal at 2002, 172, 01:40. END **************************************************************************** DATA PROBLEM REPORT DMCQC2012:0010 2012/02/10 IRIS DMC Gillian Sharer DMC 443A TA ?HN 2011,044,21:10:00 2011,067,00:00:00 Problem Description DEAD CHANNEL TA.443A.?HN was non-seismic from 2011 day 044-066. END PROBLEM RESOLUTION REPORT DMCQC2012:0010 2012/02/10 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The station began recording data normally after a sensor swap on 2011 day 067 00:00 UTC. The service report notes possible corrosion on the old sensor connector pins. END **************************************************************************** DATA PROBLEM REPORT ASL2002:044 2002/05/24 ASL DCC Valerie Peyton ASL TATO IU 10/* 2002,144,01:52:00 2002,144,03:50:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The STS2 at TATO is being moved to a new vault. All channels are inoperative during the move. END PROBLEM RESOLUTION REPORT ASL2002:044 2002/05/24 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The instrument move took roughly two hours. STS2 data from TATO return to normal quality at 2002, 144, 03:50. END **************************************************************************** DATA PROBLEM REPORT ASL2002:045 2002/05/27 ASL DCC Valerie Peyton ASL GUMO IU SHE HHE 1998,135,05:58:00 1998,135,07:40:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. A large local event caused the E component of the CMG3-T at GUMO to fall against one of its stops. END PROBLEM RESOLUTION REPORT ASL2002:045 2002/05/27 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The GUMO station operator recentered the CMG3-T on 1998, 135, 07:40. Data quality returns to normal after this action. END **************************************************************************** DATA PROBLEM REPORT ASL2002:046 2002/05/29 ASL DCC Valerie Peyton ASL MA2 IU 00/*HN 2002,149,06:53:00 2002,168,22:55:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The N component of the STS1 at MA2 has fallen against its stop. END PROBLEM RESOLUTION REPORT ASL2002:046 2002/06/18 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The MA2 station operator recentered the STS1 N component on 2002, 168, 22:55. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2002:047 2002/05/31 ASL DCC Valerie Peyton ASL HIA IC 00/*HZ 2002,151,01:07:00 2002,157,04:33:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4620 Incorrect instrument response for low frequencies only The Z component of the STS1 at HIA has a response problem. It appears that the instrument is in free period mode, and possible also in 20 second mode. The instrument response is corrupt from 0.1 Hz down on into all of the lower frequencies. END PROBLEM RESOLUTION REPORT ASL2002:047 2002/06/06 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The STS1 Z component at HIA has been returned to 360 second mode. Data quality returns to normal at 2002, 157, 04:33. END **************************************************************************** DATA PROBLEM REPORT ASL2002:040 2002/05/16 ASL DCC Valerie Peyton ASL SPA IU 10/*H* 2002,136,04:40:00 2002,153,03:51:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. All three components of the CMG3-T at SPA have fallen against their stops. END PROBLEM RESOLUTION REPORT ASL2002:040 2002/06/03 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The SPA station operator recentered the CMG3-T at 2002, 153, 03:51. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT DMCQC2012:0019 2012/07/09 IRIS DMC Peggy Johnson DMC E40A TA ?HE 2012,102,09:15:00 2012,169,23:18:00 Problem Description OTHER During the M 8.6 Sumatra earthquake, at approximately 0915 UTC on 2012.102, the DC level on E decreased by about -2,500 counts. This was accompanied by a decrease in amplitudes to about one-half. A calibration on d 110 did not restore the amplitudes nor the DC value to the correct levels. END PROBLEM RESOLUTION REPORT DMCQC2012:0019 2012/07/09 IRIS DMC Peggy Johnson Description of Problem Resolution RESOLUTION The Q330 and Guralp cable were replaced on 2012.169 at 23:18, resulting in normal amplitudes on ?HE. END **************************************************************************** DATA PROBLEM REPORT ASL2002:041 2002/05/17 ASL DCC Valerie Peyton ASL SPA IU 00/*HN 2002,136,07:33:00 2002,138,05:40:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The N component of the STS1 at SPA has gone to raw digitizer noise as of 2002, 136, 07:33. The station operators are looking into the problem. END PROBLEM RESOLUTION REPORT ASL2002:041 2002/05/20 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The SPA station operator found a loose wire on the STS1 N and reattached it properly. Data quality is almost normal as of 2002, 138, 05:40. The only problem left is that now the response is off. For more information, please see ASL2002:042. END **************************************************************************** DATA PROBLEM REPORT DMCQC2012:0018 2012/04/11 IRIS DMC Peggy Johnson DMC H32A TA * 2012,040,16:52:00 2012,075,17:00:00 Problem Description OTHER TA.H32A.VM3 stopped responding to mass recenter commands 2012.040 16:52 UTC and remained stuck at -56 to -58 counts. END PROBLEM RESOLUTION REPORT DMCQC2012:0018 2012/04/11 IRIS DMC Peggy Johnson Description of Problem Resolution RESOLUTION On 2012.075, the site was serviced. The sensor was unpacked and releveled. Drilled a new hole and installed anchor. Secured the sand tube, repacked sand, and sent a centering command successfully. END **************************************************************************** DATA PROBLEM REPORT ASL2002:042 2002/05/20 ASL DCC Valerie Peyton ASL SPA IU 00/*HN 2002,138,05:40:00 2002,153,04:00:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4620 Incorrect instrument response for low frequencies only The STS-1 N component at SPA appears to be in free period mode or 20 second mode. The response is incorrect below 0.1 Hz. END PROBLEM RESOLUTION REPORT ASL2002:042 2002/06/03 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The SPA station operator reset the jumpers in the feedback box for the STS1 N component. The instrument response returns to normal at 2002, 153, 04:00. END **************************************************************************** DATA PROBLEM REPORT DMCQC2012:0017 2012/04/10 IRIS DMC Peggy Johnson DMC E40A TA * 2012,075,08:07:00 2012,087,18:00:00 Problem Description INCORRECT TIME The GPS lost the signal lock. END PROBLEM RESOLUTION REPORT DMCQC2012:0017 2012/04/10 IRIS DMC Peggy Johnson Description of Problem Resolution RESOLUTION Correct timing was restored when the Q330 was replaced. END **************************************************************************** DATA PROBLEM REPORT ASL2002:043 2002/05/22 ASL DCC Valerie Peyton ASL GUMO IU 10/*H* 2002,141,23:46:00 2002,142,00:06:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. A local earthquake caused the E component of the CMG3-T at GUMO to fall against its stop. The N & Z components simply responded non-linearly the the event. The station operator recentered the instrument during the coda of the earthquake. END PROBLEM RESOLUTION REPORT ASL2002:043 2002/05/22 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Thanks to the prompt efforts of the GUMO station operator, the only data lost are the 20 minutes of this earthquake. Data quality returns to normal 2002, 142 00:06. END **************************************************************************** DATA PROBLEM REPORT DMCQC2012:0016 2012/03/30 IRIS DMC Peggy Johnson DMC F43A TA ?H? 2011,296,00:00:00 2012,082,23:59:00 Problem Description OTHER Starting on around d 2011.296, the seismic channels gradually got noisier at long periods, up to about 20 dB noisier. END PROBLEM RESOLUTION REPORT DMCQC2012:0016 2012/03/30 IRIS DMC Peggy Johnson Description of Problem Resolution RESOLUTION Replacing the sensor returned the long period amplitudes of the seismic channels to expected levels. END **************************************************************************** DATA PROBLEM REPORT DMCQC2012:0015 2012/03/08 IRIS DMC Gillian Sharer DMC TOLK TA 01/?HN 2012,066,02:37:00 2012,068,16:35:00 Problem Description OTHER TOLK.01.VM5 came up against the stops sometime between 2012.066 02:37 and 17:35 UTC, rendering TOLK.01.?HN non-seismic. END PROBLEM RESOLUTION REPORT DMCQC2012:0015 2012/03/08 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION TOLK.01.?HZ returned to normal operation after a mass recenter on 2012.068 16:35 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2012:0014 2012/03/08 IRIS DMC Gillian Sharer DMC TOLK TA 01/?HN 2012,046,16:47:00 2012,047,21:03:00 Problem Description OTHER TOLK.01.VM5 came up against the stops sometime between 2012.046 16:47 and 20:01 UTC, rendering TOLK.01.?HN non-seismic. END PROBLEM RESOLUTION REPORT DMCQC2012:0014 2012/03/08 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION TOLK.01.?HZ returned to normal operation after a mass recenter on 2012.047 21:03 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2012:0013 2012/03/02 IRIS DMC Gillian Sharer DMC R43A TA * 2012,027,18:00:00 2012,061,18:45:00 Problem Description OTHER TA.R43A became non-seismic on 2012.027 18:00 UTC when VM2 came up against the stops. R43A had stopped responding to mass recenter attempts in early December 2011. END PROBLEM RESOLUTION REPORT DMCQC2012:0013 2012/03/02 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION R43A resumed normal operation after the sensor was replaced on 2012.061 18:45 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2012:0012 2012/02/10 IRIS DMC Gillian Sharer DMC 341A TA ?H? 2011,067,00:00:00 2011,068,17:00:00 Problem Description OTHER TA.341A.VM1 was against the stops. ?HE was non-seismic; data from ?H[NZ} was suspect. END PROBLEM RESOLUTION REPORT DMCQC2012:0012 2012/02/10 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION Normal data recording began after the sensor was replaced on 2011 068 17:00 UTC. END **************************************************************************** DATA PROBLEM REPORT ASL2002:059 2002/06/20 ASL DCC Tyler Storm ASL MAKZ IU 10/* 2001,361,08:50:00 2001,363,03:37:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The channels from the STS-2 are dead. END PROBLEM RESOLUTION REPORT ASL2002:059 2002/06/20 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION The channels from the STS-2 are back to normal at 2001,363,03:37. END **************************************************************************** DATA PROBLEM REPORT ASL2002:055 2002/06/10 ASL DCC Valerie Peyton ASL ANMO IU 10/*H* 2002,161,16:46:00 2002,161,17:15:00 Problem Description OTHER SEED COMMENT REFERENCE C 1835 TEST DATA We are making another attempt at running calibrations on the CMG3-T-B at ANMO as part of a CTBTO test. Data quality is unreliable during this time period. END PROBLEM RESOLUTION REPORT ASL2002:055 2002/06/10 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The attempt to run calibrations on the CMG3-T-B at ANMO failed. Data quality returns to normal at 2002, 161, 17:15. END **************************************************************************** DATA PROBLEM REPORT ASL2002:056 2002/06/11 ASL DCC Valerie Peyton ASL KONO IU 00/*HN 2002,159,15:02:00 2002,210,14:55:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The N component of the STS1 at KONO is losing mass capture. Data quality and response quality begin degrading at 2002, 159, 15:02. We hope the station operator will be able to catch the problem before the mass is lost completely. END PROBLEM RESOLUTION REPORT ASL2002:056 2002/07/30 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The KONO station operator recentered the STS1 N component. Data quality returns to normal at 2002, 210, 14:55. END **************************************************************************** DATA PROBLEM REPORT ASL2002:057 2002/06/17 ASL DCC Valerie Peyton ASL BILL IU 00/*HE 2002,168,17:20:00 2002,169,03:16:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The E component of the STS1 at BILL has fallen against one of its stops. Data are unuseable. END PROBLEM RESOLUTION REPORT ASL2002:057 2002/06/17 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The BILL station operator recentered the STS1 E component 8 hours after the mass fell against a stop. Unfortunately, the E component was not recentered soon enough to record the 6.7 Santa Cruz Islands event on 2002, 168. END **************************************************************************** DATA PROBLEM REPORT ASL2002:058 2002/06/20 ASL DCC Valerie Peyton ASL TIXI IU 00/*HE 2002,167,05:20:00 2002,171,03:45:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The E component of the STS-1 has fallen against a stop. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2002:058 2002/06/20 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The TIXI station operator recentered the STS-1 E component. Data quality returns to normal at 2002, 171, 03:45. END **************************************************************************** DATA PROBLEM REPORT ASL2002:051 2002/06/07 ASL DCC Valerie Peyton ASL ANMO IU 10/*H* 2002,158,13:54:00 2002,158,17:34:00 Problem Description OTHER SEED COMMENT REFERENCE C 1835 TEST DATA We are running calibrations on the CMG3-T-B at ANMO as part of a CTBTO test. Data quality is unreliable during this time period. END PROBLEM RESOLUTION REPORT ASL2002:051 2002/06/10 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The attempt to run calibrations on the CMG3-T-B at ANMO failed. Making the attempt compromised the data from all three channels during this time. Bits and pieces of the data are useful, but for the most part the channels can be considered dead. Data quality returns to normal at 2002, 158, 17:34. END **************************************************************************** DATA PROBLEM REPORT DMCQC2012:0008 2012/02/10 IRIS DMC Peggy Johnson DMC J31A TA ?HN 2012,015,10:08:00 2012,038,18:17:00 Problem Description DATA DROPOUTS On d 015 at 1008 UTC the dc level of the N component gradually decreased and the amplitudes of the N component decreased to approximately half the expected level. END PROBLEM RESOLUTION REPORT DMCQC2012:0008 2012/02/10 IRIS DMC Peggy Johnson Description of Problem Resolution RESOLUTION The sensor was replaced on d 037 at 1840 UTC. After the normal sensor settling period and an MRC on d 038 at 18:17 UTC, the level of amplitudes of the N component returned to what is expected. END **************************************************************************** DATA PROBLEM REPORT ASL2002:052 2002/06/07 ASL DCC Valerie Peyton ASL TATO IU 00/*H* 2002,147,03:35:00 2002,164,02:33:00 Problem Description OTHER The DC offset on the KS54000 at TATO has changed drastically. Instead of being around zero, the DC offset is now in the hundreds of thousands of counts to millions of counts. Except for this incorrect DC offset, the data are fine. END PROBLEM RESOLUTION REPORT ASL2002:052 2002/06/13 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The DC offsets on the KS54000 at TATO have returned to normal. END **************************************************************************** DATA PROBLEM REPORT DMCQC2012:0007 2012/02/10 IRIS DMC Gillian Sharer DMC 438A TA BHE 2011,004,13:23:00 2011,033,23:14:00 Problem Description INVALID RESPONSE During this time period, TA.438A.BHE was not accurately recording frequencies greater then 3 Hz. END PROBLEM RESOLUTION REPORT DMCQC2012:0007 2012/02/10 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION Normal operation resumed after the sensor was replaced on 2011.033 23:14 UTC. END **************************************************************************** DATA PROBLEM REPORT ASL2002:053 2002/06/07 ASL DCC Valerie Peyton ASL MSKU IU */* 2002,156,00:00:00 2002,163,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. Field engineers are on-site at MSKU, trying to get the station in operational order. Tests, calibrations, and general data anomalies are expected. END PROBLEM RESOLUTION REPORT ASL2002:053 2002/06/21 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The field engineers left MSKU on 2002, 163. It was not possible to completely restore the station to full operation during this visit. Consequently, only two components are fully operational: 00/Z and 10/N. The 10/E component has lost half its double-ended output; the 00/N, 00/E, and 10/Z components are completely non-functional. We are in the process of preparing and shipping replacement parts to the station in an effort to return all components to full operational order. Much patience and perseverence is required in this process. END **************************************************************************** DATA PROBLEM REPORT DMCQC2012:0006 2012/02/07 IRIS DMC Gillian Sharer DMC SFIN TA ?H[NEZ] 2012,023,09:55:00 2012,035,17:00:00 Problem Description LOW FREQUENCY NOISE The station had problems with water in the vault. During this time period the data at low frequencies was dominated by pump noise (>~12 seconds for ?H[NE] and > ~27 seconds for ?HZ). END PROBLEM RESOLUTION REPORT DMCQC2012:0006 2012/02/07 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The pump noise resolved after a service visit on 2/4/2012. END **************************************************************************** DATA PROBLEM REPORT ASL2002:054 2002/06/10 ASL DCC Valerie Peyton ASL HIA IC 00/*HZ 2002,157,19:57:00 2002,245,05:49:00 Problem Description OTHER SEED COMMENT REFERENCE C 4400 Channel data quality is very poor. Data quality for the Z component of the STS1 at HIA is approaching abysmal. For some reason, there are lots of recenterings of the mass, as well as many instances of the jumpers being moved into free period mode. The first group of problems corrupts the data entirely; the second group simply corrupts the instrument response below 0.1 Hz. Between episodes, data quality is fine. END PROBLEM RESOLUTION REPORT ASL2002:054 2002/09/05 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The problem turned out to be a faulty feedback box on the STS1 Z at HIA. The station operator has temporarily swapped the Z and N feedback boxes at HIA while we ship a replacement feedback box to solve the problem completely. In the meantime, the Z data quality has improved and the N data quality is now poor. The Z response is now off by less than 1%, since it is operating off a feedback box designed for the N component. However, this is preferable to the awful problems we were having with the Z. The problems with the Z end at 2002, 245, 05:49; the problems with the N begin at the same time. For the full time span during which the N assumes the Z problems, please see ASL2002:087 END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:149 2006/02/14 IRIS DMC Mary Templeton DMC TX04 IM SHZ 2006,040,14:15:00 2006,100,15:26:00 Problem Description DATA DROPOUTS The TXAR array is down for a CD1.1 telemetry upgrade. END PROBLEM RESOLUTION REPORT DMCQC2006:149 2006/04/14 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION TX04 data transmission resumed 2006,100,15:26. END **************************************************************************** DATA PROBLEM REPORT DMCQC2012:0005 2012/02/07 IRIS DMC Gillian Sharer DMC X43A TA * 2011,339,05:38:00 2012,020,19:20:00 Problem Description DATA GLITCHES The vault at TA.X43A had water infiltration starting in early December 2011. The data began to show the effects of equipment corrosion on day 2011 339 05:38 utc. During this time period the data alternated between having data spikes and being totally non-seismic. END PROBLEM RESOLUTION REPORT DMCQC2012:0005 2012/02/07 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The sensor was replaced on 2012 020 19:20 utc. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:148 2006/02/14 IRIS DMC Mary Templeton DMC TX03 IM SHZ 2006,040,14:15:00 2006,100,15:26:00 Problem Description DATA DROPOUTS The TXAR array is down for a CD1.1 telemetry upgrade. END PROBLEM RESOLUTION REPORT DMCQC2006:148 2006/04/14 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION TX03 data transmission resumed 2006,100,15:26. END **************************************************************************** DATA PROBLEM REPORT DMCQC2012:0004 2012/02/07 IRIS DMC Gillian Sharer DMC GSC CI * 2011,355,17:17:00 2012,020,20:48:00 Problem Description DEAD CHANNEL The STS- 1 sensor at CI.GSC was disconnected from 2011 day 355 17:17 UTC to 2012 day 020 20:48 UTC while the site was undergoing asbestos remediation. The station returned digitizer noise during this time period. END PROBLEM RESOLUTION REPORT DMCQC2012:0004 2012/02/07 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION Data resumed after the sensor was reconnected on 2012.020. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:147 2006/02/14 IRIS DMC Mary Templeton DMC TX02 IM SHZ 2006,040,14:15:00 2006,100,15:26:00 Problem Description DATA DROPOUTS The TXAR array is down for a CD1.1 telemetry upgrade. END PROBLEM RESOLUTION REPORT DMCQC2006:147 2006/04/14 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION TX02 data transmission resumed 2006,100,15:26. END **************************************************************************** DATA PROBLEM REPORT DMCQC2012:0003 2012/01/06 IRIS DMC Peggy Johnson DMC J24A TA ?H? 2009,152,17:50:00 2009,168,20:30:00 Problem Description DATA LOGGER PROBLEM Numerous glitches during this time period. Sending a calibration did not fix the problem. END PROBLEM RESOLUTION REPORT DMCQC2012:0003 2012/01/06 IRIS DMC Peggy Johnson Description of Problem Resolution RESOLUTION Normal data resumed after digitizer replacement. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:146 2006/02/14 IRIS DMC Mary Templeton DMC TX01 IM SHZ 2006,040,00:41:00 2006,100,15:26:00 Problem Description DATA DROPOUTS The TXAR array is down for a CD1.1 telemetry upgrade. END PROBLEM RESOLUTION REPORT DMCQC2006:146 2006/04/14 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION TX01 data transmission resumed 2006,100,15:26. END **************************************************************************** DATA PROBLEM REPORT DMCQC2012:0002 2012/01/06 IRIS DMC Peggy Johnson DMC TEST TE test 2009,152,17:50:00 2009,168,20:30:00 Problem Description OTHER Testing changes for the new year. END **************************************************************************** DATA PROBLEM REPORT ASL2002:050 2002/06/07 ASL DCC Valerie Peyton ASL TATO IU 10/*H* 2002,147,02:52:00 2002,147,03:56:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. During this time frame, the high-gain STS2 at TATO is being swapped out with a low-gain STS2 by the station operator. This change was made on the part of the operator with the hopes of lowering noise levels in the STS2 data. END PROBLEM RESOLUTION REPORT ASL2002:050 2002/06/07 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Data quality from the STS2 at TATO returns to normal at 2002, 147, 03:56. Since the replacement STS2 is a low-gain version of the seismometer, it will be less likely to peg during large local events. END **************************************************************************** DATA PROBLEM REPORT DMCQC2012:0009 2012/02/10 IRIS DMC Gillian Sharer DMC Z36A TA ?HE 2010,364,16:44:00 2010,364,19:55:00 Problem Description OTHER On 2010.364 16:44 UTC, TA.Z36A.VM3 hit the stops causing the E channel to become non-seismic. END PROBLEM RESOLUTION REPORT DMCQC2012:0009 2012/02/10 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The sensor began recording normally again after a mass recenter on 2010.364 19:55 UTC. END **************************************************************************** DATA PROBLEM REPORT HRV1996:003 1996/01/29 Harvard WQC Misha Salganik ASL KURK II BHN 1995,265,05:39:00 1995,265,00:03:00 Problem Description LOW FREQUENCY NOISE Postscript file was placed into /pub/qc/qc_ps. The channel is almost useless in the CMT ( T > 45 sec) range. END PROBLEM RESOLUTION REPORT HRV1996:003 1996/02/05 IDA Peter Davis Description of Problem Resolution COMMENT We concur that the *HN channels are noisier than the *HE channels at long periods. Unfortunately, it is our experience that this is generally the case at KURK. END **************************************************************************** DATA PROBLEM REPORT HRV1996:001 1996/01/29 Harvard WQC Misha Salganik ASL KBS IU BHN 1995,266,22:31:00 1995,266,22:31:00 Problem Description POLARITY REVERSED Postscript file was placed into /pub/qc/qc_ps END **************************************************************************** DATA PROBLEM REPORT HRV1996:002 1996/01/29 Harvard WQC Misha Salganik SPYDER KMBO IU LHN LHE 1996,000,22:08:59 1996,000,22:08:59 Problem Description LOW FREQUENCY NOISE Postscript file was placed into /pub/qc/qc_ps END **************************************************************************** DATA PROBLEM REPORT HRV1996:007 1996/03/12 Harvard WQC Misha Salganik ASL YAK IU BHZ LHZ 1995,294,02:38:00 1995,294,02:38:00 Problem Description LOW FREQUENCY NOISE Postscript file was placed into /pub/qc/qc END **************************************************************************** DATA PROBLEM REPORT HRV1996:008 1996/03/12 Harvard WQC Misha Salganik SPYDER MA2 IU LHN VHN 1996,000,63:16:37 1996,000,63:16:37 Problem Description DATA DROPOUTS Postscript file was placed into /pub/qc/qc END PROBLEM RESOLUTION REPORT HRV1996:008 1996/03/27 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION I logged into MA2, and viewed the LH and VH data for this quake. The data gap did not show up. In other words, I was able to look at everything. I would guess there was some problem "pulling" the data off of the system that particular day. Whatever the case, the data will be available through the normal channels once we receive the data tape. END **************************************************************************** DATA PROBLEM REPORT HRV1996:005 1996/01/29 Harvard WQC Misha Salganik SPYDER SJG IU LHZ 1996,000,22:23:20 1996,000,22:23:20 Problem Description LOW FREQUENCY NOISE Postscript file was placed into /pub/qc/qc_ps END **************************************************************************** DATA PROBLEM REPORT HRV1996:006 1996/03/12 Harvard WQC Misha Salganik ASL SSPA IU LHN 1996,000,49:23:49 1996,000,49:23:49 Problem Description POLARITY REVERSED Postscript file was placed into /pub/qc/qc END **************************************************************************** DATA PROBLEM REPORT ASL2002:066 2002/07/11 ASL DCC Valerie Peyton ASL ANMO IU 10/*H1 2002,191,18:59:00 2002,193,21:12:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. While trying to run a calibration on the CMG-3TB seismometer at ANMO, the north channel mass (1 component) got stuck to one side and could not be re-centered. END PROBLEM RESOLUTION REPORT ASL2002:066 2002/08/02 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION ASL field engineers managed to unstick the 1 component of the ANMO CMG3-T-B at 2002,193,21:12. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2002:067 2002/07/11 ASL DCC Valerie Peyton ASL ANMO IU 10/*H* 2002,192,14:20:00 2002,192,22:28:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4105 Seismometer not connected to digitizer. While trying to run a calibration on the CMG-3TB seismometer at ANMO, the north channel mass (1 component) got stuck to one side and could not be re-centered. The seismometer has been removed, will be manually adjusted, and re-installed. END PROBLEM RESOLUTION REPORT ASL2002:067 2002/07/11 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The ANMO CMG3-T-B was repaired and re-installed roughly 8 hours after the problem began. Data quality returns to normal 2002, 192, 22:28. END **************************************************************************** DATA PROBLEM REPORT ASL2002:068 2002/07/15 ASL DCC Valerie Peyton ASL SNZO IU 00/*H* 2002,197,06:33:00 2003,029,22:12:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The KS36000I at SNZO has gone to digitizer noise on all three channels. We think something may have happened to the power source at the top of the borehole. We have asked the station operator to investigate. END PROBLEM RESOLUTION REPORT ASL2002:068 2003/01/30 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The KS36000I at SNZO has been replaced with an operational 54000. Data quality returns to normal (actually, now it's even better than before!) at 2003, 029, 22:12. END **************************************************************************** DATA PROBLEM REPORT ASL2002:069 2002/07/16 ASL DCC Valerie Peyton ASL ANMO IU 10/*H* 2002,196,14:51:00 2002,196,18:45:00 Problem Description DATA GLITCHES SEED COMMENT REFERENCE C 1835 TEST DATA During this time we were attempting to calibrate the ANMO CMT3-T-B. Unfortunately, the instrument still is not capable of properly interpreting the calibration signal. As a result, data are corrupted by severe data glitches. END PROBLEM RESOLUTION REPORT ASL2002:069 2002/07/16 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION We ended the calibration attempt on the ANMO CMG3-T-B roughly four hours after it began. Data quality returns to normal on the Z and 2 components at 2002, 196, 18:45. The 1 component fell against a stop at the end of the test. For more information on that problem, please see ASL2002:070. END **************************************************************************** DATA PROBLEM REPORT ASL2002:062 2002/06/27 ASL DCC Valerie Peyton ASL OTAV IU 10/*HN 10/*HE 2002,178,08:41:00 2002,186,17:44:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The N and E components of the CMG3-T at OTAV have fallen against their stops. We do not currently know the precise start time of the problem, as it becomes visible to us after a break in the live data. END PROBLEM RESOLUTION REPORT ASL2002:062 2002/07/08 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The CMG3-T at OTAV was recentered, and one of the pegged components came back to center. Data quality for the N component is back to normal as of 2002, 186, 17:44 (this time may change when tape data is received to fill in the gaps). Data quality for the E component is still bad (see ASL2002:065 for the continuation of the problem). END **************************************************************************** DATA PROBLEM REPORT ANSS2007:012 2007/01/19 ANSS DCC leo ANSS CBKS US ?H? 2007,001,00:00:00 2007,001,00:00:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE S 2515 Data dropouts CBKS/ NO DATA 2007,001,00:00-.005,02:26. END **************************************************************************** DATA PROBLEM REPORT ASL2002:063 2002/06/27 ASL DCC Valerie Peyton ASL MIDW IU 00/*H* 2001,315,00:34:00 2002,153,20:05:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. Station MIDW malfunctioned on 2001, 315. Even though the instrument was working fine, the data acquisition system was not working and data consequently are flat-lined. END PROBLEM RESOLUTION REPORT ASL2002:063 2002/06/27 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The problems with the data acquisition system at MIDW required the attention of one of our field engineers. Since the site is remote (to say the least), and flights to the island severely limited, it was just over half a year before we were able to obtain a flight out to repair the system. Data quality returns to normal on 2002, 153, 20:05. END **************************************************************************** DATA PROBLEM REPORT ANSS2007:011 2007/01/19 ANSS DCC leo ANSS BW06 US ?H? 2007,001,00:00:00 2007,001,00:00:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE S 2501 Data unusable. BW06/ NO Data 2007,001,00:00->009,08:25. END **************************************************************************** DATA PROBLEM REPORT ASL2002:064 2002/06/27 ASL DCC Valerie Peyton ASL COR IU 00/*HZ 2001,362,19:42:00 2002,060,17:43:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The Z mass is pegged; vertical data are unuseable. END PROBLEM RESOLUTION REPORT ASL2002:064 2002/12/03 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION Vertical mass was centered 2002,060,17:43:00. END **************************************************************************** DATA PROBLEM REPORT ANSS2007:014 2007/01/19 ANSS DCC leo ANSS COWI US ?H? 2007,001,00:00:00 2007,001,00:00:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE S 2515 Data dropouts COWI/ NO DATA 2007,001,00:00->009,17:21 END **************************************************************************** DATA PROBLEM REPORT ASL2002:065 2002/07/08 ASL DCC Valerie Peyton ASL OTAV IU 10/*HE 2002,186,17:44:00 2002,207,17:11:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The E component of the CMG3-T at OTAV is against the stop. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2002:065 2002/07/29 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The OTAV station operator recentered the CMG3-T on 2002, 207, 17:11. Data quality has returned to normal. END **************************************************************************** DATA PROBLEM REPORT ANSS2007:013 2007/01/19 ANSS DCC leo ANSS AGMN US ?H? 2007,001,00:00:00 2007,001,00:00:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE S 2515 Data dropouts AGMN/ NO DATA 2007,001,00:00->008,00:00 END **************************************************************************** DATA PROBLEM REPORT ANSS2007:016 2007/01/22 ANSS DCC leo ANSS PKME US ?H? 2007,012,17:01:00 2007,012,17:01:00 Problem Description OTHER SEED COMMENT REFERENCE S 2501 Data unusable. PKME/ Station back online 2007,012,17:01 Instrument on stops until re Center at 018,19:00 END **************************************************************************** DATA PROBLEM REPORT ANSS2007:015 2007/01/19 ANSS DCC leo ANSS ECSD US ?H? 2007,001,00:00:00 2007,001,00:00:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE S 2515 Data dropouts ECSD/ NO DATA 2007,001,00:00->013,09:31 END **************************************************************************** DATA PROBLEM REPORT ASL2002:060 2002/06/20 ASL DCC Tyler Storm ASL MAKZ IU 10/* 2002,030,10:01:00 2002,038,04:21:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The channels from the STS-2 are dead. END PROBLEM RESOLUTION REPORT ASL2002:060 2002/06/20 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION The channels from the STS-2 are back to normal at 2002,038,04:21. END **************************************************************************** DATA PROBLEM REPORT ANSS2007:018 2007/02/07 ANSS DCC leo ANSS WRAK US ?H? 2007,012,08:51:00 2007,012,08:51:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE S 2515 Data dropouts WRAK/ Excessive Data Gaps 2007,012,08:51->015,08:36 END **************************************************************************** DATA PROBLEM REPORT ASL2002:061 2002/06/26 ASL DCC Valerie Peyton ASL TIXI IU 00/*HZ 2002,176,19:24:00 2002,177,04:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The Z component of the STS-1 at TIXI has fallen against one of its stops. END PROBLEM RESOLUTION REPORT ASL2002:061 2002/06/26 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The TIXI station operator recentered the STS-1 Z component roughly nine hours after the mass began to fall. Data quality returns to normal on 2002, 177, 04:00. END **************************************************************************** DATA PROBLEM REPORT ANSS2007:017 2007/02/07 ANSS DCC leo ANSS WMOK US ?H? 2007,012,10:16:00 2007,014,16:00:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE S 2515 Data dropouts WMOK/ Excessive data gaps 2007,012,10:16->014,16:00 END **************************************************************************** DATA PROBLEM REPORT HRV1996:009 1996/04/02 Harvard WQC Misha Salganik ASL MDJ CD LHZ 1995,317,02:17:00 1995,317,02:17:00 Problem Description OTHER The channel contains low amplitude noise instead of the signal. Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1996:009 1996/06/17 ASL DCC Tyler Storm Description of Problem Resolution COMMENT I see what you are talking about, but I can't explain it other than to say the equipment is wearing out. I have looked at several events where the vertical appears almost dead until I drastically change the scale. At that point, the signal looks good, but it is about 100 times too small. Later in Apr 96, I noticed the vertical looks good for events, but hardly any signal can be seen on the n/s data. Possibly, the field engineer on site was swapping components at this time to troubleshoot the problem, but I do not remember hearing about it. I'll check with him to see if he can shed some light on the subject. Most likely, the MDJ will remain in this marginal state until it is upgraded to an IRIS type station (upgrade is tentatively scheduled for Nov 96). SUPPLEMENT For the full duration of these and other digitizer-related problems, please see HRV1995:051. END **************************************************************************** DATA PROBLEM REPORT ANSS2007:010 2007/01/19 ANSS DCC leo ANSS ACSO US ?H? 2007,001,00:00:00 2007,017,20:44:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE S 2501 Data unusable. ACSO/ Open inputs no INSTRUMENT 2007,001,00:00-.017,20:44 INStrument connected and Data AFTER 017,20:44->. END **************************************************************************** DATA PROBLEM REPORT HRV1996:014 1996/04/29 Harvard WQC Misha Salganik ASL MDJ CD BHZ BHN BHE 1995,345,14:09:00 1995,345,14:09:00 Problem Description DATA GLITCHES Postscript file wasplaced into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1996:014 1996/06/17 ASL DCC Tyler Storm Description of Problem Resolution COMMENT The data glitches were possibly caused by fluctuating power, but more likely by problems with the analog to digital converter. I am not overly familiar with these "older type" systems, but I have been told if there are even slight problems with the A/D conversion, you will see a very large data spike. Since the station will be upgraded around Nov 96, no further action will be taken. SUPPLEMENT For the full duration of these and other digitizer-related problems, please see HRV1995:051. END **************************************************************************** DATA PROBLEM REPORT HRV1996:015 1996/04/29 Harvard WQC Misha Salganik SPYDER PAS TS LH* 1996,118,08:40:00 1996,118,08:40:00 Problem Description INVALID RESPONSE The amplitude of the observed data seems to be smaller than necessary. Postscript file wasplaced into /pub/qc/qc_ps. # END PROBLEM RESOLUTION REPORT HRV1996:015 1996/10/23 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION The station personnel updated the system configuration file at PAS around 17 Apr 96. The new config file has different multiplication factors applied to the LH, and the derived channels than the previous config file. From 17 Apr 96 until 22 Oct 96, the PAS dataless SEED volume stated the LH, VH, and UH streams with a sensitivity 4 times too high. The PAS dataless SEED volume has now been rebuilt with the new sensitivity values. Please be sure to use the latest version of the TS/PAS dataless SEED. END **************************************************************************** DATA PROBLEM REPORT HRV1996:012 1996/04/29 Harvard WQC Misha Salganik ASL ANMO IU LHN LHV BHN BHV 1995,364,12:11:00 1995,364,12:11:00 Problem Description OTHER The channels are very noisy. Postscript file wasplaced into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1996:012 1996/06/21 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION The seismometer masses were against the stops. The instrument masses were re-centered on 9 Feb 96. END **************************************************************************** DATA PROBLEM REPORT HRV1996:013 1996/04/29 Harvard WQC Misha Salganik ASL KMI CD BHE BHN BHZ 1995,339,06:32:00 1995,339,06:32:00 Problem Description DATA GLITCHES Postscript file wasplaced into /pub/qc/qc_ps END **************************************************************************** DATA PROBLEM REPORT HRV1996:018 1996/06/04 Harvard WQC Misha Salganik SPYDER LBTB GT LHZ 1996,132,13:43:00 1996,132,13:43:00 Problem Description POLARITY REVERSED Postscript file was placed into /pub/qc/qc_ps. END PROBLEM RESOLUTION REPORT HRV1996:018 2000/04/04 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION There is an incorrect time stamp on the original SPYDER files for LH* data from station LBTB for the 1996/05/11 13:43:44.0 Solomon Islands event (LH* data are shifted ~86 seconds early). The time stamp for data from this event is correct for all other data request mechanisms (including FARM). It is not clear how the time stamp in the SPYDER data came to be incorrect, and we simply recommend acquiring the data for this event from the FARM volume, or by direct request to the DMC. This mis-stamping of time in SPYDER data appears to be an isolated incident, and it only affects the LH* data; the BH* data time stamp is fine. Since this is the only documented incident we know of, no further action will be taken. END **************************************************************************** DATA PROBLEM REPORT ANSS2007:009 2007/01/19 ANSS DCC leo ANSS ECSD US ?H? 2006,164,13:02:00 2006,164,13:02:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE S 2515 Data dropouts ECSD? Data Dropouts as Noted 2006, 164,13:02->167,16:01 (3.1days) 172,12:56->175,21:11 (3.3days) 176,16:07->179,12:57 (2.9d 184,10:44-.186,13:17 (2.1d 186,23:15->187,17:49 (18.6hrs). END **************************************************************************** DATA PROBLEM REPORT ANSS2007:008 2007/01/19 ANSS DCC leo ANSS GOGA US ?H? 2006,177,00:00:00 2006,191,15:44:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE S 2515 Data dropouts GOGA/ Excessive Gaps in Data 2006,177,00:00-> 191,15:44 END **************************************************************************** DATA PROBLEM REPORT ASL2002:077 2002/08/07 ASL DCC Valerie Peyton ASL OTAV IU 10/*HN 10/*HE 2002,218,16:33:00 2002,225,19:03:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The N and E components of the CMG3-T at OTAV have fallen against their stops. The station operator will attempt to recenter the instrument at the next available opportunity. END PROBLEM RESOLUTION REPORT ASL2002:077 2002/08/14 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The OTAV station operator recentered the CMG3-T at 2002, 225, 19:03. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT HRV1996:010 1996/04/02 Harvard WQC Misha Salganik ASL TSUM IU BH* LH* 1995,328,06:18:00 1995,328,06:18:00 Problem Description OTHER DEAD CHANNEL The channel contains low amplitude noise instead of the signal. Postscript file was put into /pub/qc/qc_ps. END PROBLEM RESOLUTION REPORT HRV1996:010 1996/07/02 ASL DCC Tyler Storm Description of Problem Resolution COMMENT The data in the postscript file does look dead, but I collect the same data from our mass storage and it looks ok. Postscript file HRV1996:010_prr.ps was placed into /pub/qc/qc_ps. No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT ASL2002:078 2002/08/07 ASL DCC Valerie Peyton ASL WAKE IU */* 2002,213,00:00:00 2002,220,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. An ASL field engineer is at WAKE performing station maintenance. Data quality may be compromised at times. Calibrations and other tests may be run. END PROBLEM RESOLUTION REPORT ASL2002:078 2002/08/07 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Our field engineer left WAKE in fully operational condition on 2002, 220. Data quality is back to normal. END **************************************************************************** DATA PROBLEM REPORT HRV1996:011 1996/04/01 Harvard WQC Misha Salganik ASL TIXI IU BHN LHN UHN VHN 1995,328,01:47:00 1995,328,11:30:00 Problem Description OTHER SEED COMMENT REFERENCE C 4010 Channel is down. DEAD CHANNEL.The channel contains low amplitude noise instead of the signal. Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1996:011 1996/06/21 ASL DCC Tyler Storm Description of Problem Resolution COMMENT The station operator was re-leveling the the instruments during this time frame to compensate for the tilting pier. Unfortunately, we have not received data from TIXI since Nov 95, so I do not know how long the data was degraded. NOTE: The .ps file shows the n/s channels with the problem, not the e/w. RESOLUTION 2003, 147 The re-leveling of the TIXI instruments was completed at 1995, 328, 11:30. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2002:079 2002/08/08 ASL DCC Valerie Peyton ASL LVC IU 00/*HZ 00/*HE 2002,216,21:35:00 2002,223,20:28:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4331 Vertical and east-west inputs swapped (ie Z <=> E). In an effort to diagnose a problem with the STS1 E component at LVC, the station operator swapped the inputs of the E and Z components of the STS1 seismometers. Therefore, during this time period, data labeled Z are actually E data, and data labeled E are actually Z data. END PROBLEM RESOLUTION REPORT ASL2002:079 2002/08/13 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION This diagnostic test ended on 2002, 223, 20:28. At this point in time, the STS1 E and Z channels are being recorded under their proper names. END **************************************************************************** DATA PROBLEM REPORT ASL2002:073 2002/08/01 ASL DCC Valerie Peyton ASL BILL IU 00/*HE 2002,211,12:46:00 2002,217,01:11:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The E component of the STS1 at BILL has fallen against one of the stops. Data are not usuable. We have asked the station operator to recenter the instrument at the next available opportunity. END PROBLEM RESOLUTION REPORT ASL2002:073 2002/08/19 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The BILL station operator recentered the STS1 E component on 2002, 217, 01:11. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ANSS2007:001 2007/01/09 ANSS DCC leo ANSS BRAL US ?H? 2006,317,16:00:00 2006,317,16:00:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE S 2515 Data dropouts BRAL/ Excessive gaps 2006,317,16:00->365,23:59 END **************************************************************************** DATA PROBLEM REPORT ASL2002:074 2002/08/02 ASL DCC Valerie Peyton ASL ANMO IU 10/* 2002,214,13:43:00 2002,215,03:44:00 Problem Description OTHER SEED COMMENT REFERENCE C 1840 Calibration data We are making another attempt at running calibrations on the CMG3-T-B at ANMO as part of a CTBTO test. Data quality is unreliable during this time period. END PROBLEM RESOLUTION REPORT ASL2002:074 2002/08/05 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION The calibrations were complete at 2002,215,03:44 END **************************************************************************** DATA PROBLEM REPORT ASL2002:075 2002/08/02 ASL DCC Valerie Peyton ASL MSKU IU 00/*HE 2002,158,03:40:00 2002,158,03:40:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The E component of the STS1 at MSKU is non-functional. Its feedback box is corroded through, and we're not sure if the mass is centered. Data are unuseable. We are working with the station operator to fix the problem. END PROBLEM RESOLUTION REPORT ASL2002:075 2003/03/17 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The quality of data from the E component of the STS1 at MSKU has improved a bit. The mass is so close to one of its stops that the instrument response is now corrupted for low frequencies only. The frequencies affected vary from time to time, and can be at high as 1Hz. The high frequency data appear to be fine, although the amplitudes are sometimes suspiciously low. Data should be used with caution. This is an improvement over the completely unuseable data previously being recorded by this instrument. The feedback box is as yet unrepaired, and will remain in that condition until an ASL field engineer can visit the site. For the full duration of the new problem, please see ASL2003:048. END **************************************************************************** DATA PROBLEM REPORT ANSS2007:003 2007/01/09 ANSS DCC leo ANSS DGMT US ?H? 2006,340,01:45:00 2006,340,01:45:00 Problem Description DIGITIZER PROBLEM SEED COMMENT REFERENCE S 2507 Station down. DGMT/ No Data 2006,340,01:45 Large Gap Noted 2006,326,18:24->335,03:20 (8.8days) END **************************************************************************** DATA PROBLEM REPORT ASL2002:076 2002/08/02 ASL DCC Valerie Peyton ASL MSKU IU 10/*HE 2002,158,07:43:00 2002,175,09:00:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4625 Invalid instrument response. The E component of the CMG3-T at MSKU has lost half of its double-ended output. The shape of the response curve is roughly correct, but the amplitude is anywhere from 2dB to 30dB quieter than it should be. Data are severely compromised and should be used only with great caution. END PROBLEM RESOLUTION REPORT ASL2002:076 2003/03/17 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The E component of the CMG3-T at MSKU went from having half of its double-ended output to having none at 2002, 175, 09:00. Data are no longer useable. For the full duration of the new problem, please see ASL2003:047. END **************************************************************************** DATA PROBLEM REPORT ANSS2007:002 2007/01/09 ANSS DCC leo ANSS COWI US ?H? 2006,346,02:26:00 2006,346,02:26:00 Problem Description DATA LOGGER PROBLEM SEED COMMENT REFERENCE S 2507 Station down. COWI/ 2006,346,02:26->2007,009,17:21 No Data END **************************************************************************** DATA PROBLEM REPORT ANSS2007:005 2007/01/16 ANSS DCC leo ANSS ISCO US ?H? 2006,362,13:12:00 2007,009,19:06:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE S 2507 Station down. ISCO/ Station Down 2006,362,13:12->2007,009,19:06 Station Down NO DATA AVAILABLE END **************************************************************************** DATA PROBLEM REPORT ANSS2007:004 2007/01/16 ANSS DCC leo ANSS HDIL US ?H? 2006,349,20:11:00 2006,349,20:11:00 Problem Description DATA LOGGER PROBLEM SEED COMMENT REFERENCE S 2507 Station down. HDIL/ No Data after 2006,349,20:11 station problems NO DATA Available END **************************************************************************** DATA PROBLEM REPORT ASL2002:071 2002/07/18 ASL DCC Valerie Peyton ASL ANMO IU 10/*H* 2002,198,15:21:00 2002,213,19:40:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4105 Seismometer not connected to digitizer. The ANMO CMG3-T-B has been removed for repair. The channels will be recording digitizer noise until the instrument can be returned to the borehole. END PROBLEM RESOLUTION REPORT ASL2002:071 2002/08/02 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The ANMO CMG3-T-B was fully repaired and returned to its borehole on 2002, 213 at 19:40. Data quality has returned to normal. END **************************************************************************** DATA PROBLEM REPORT ANSS2007:007 2007/01/17 ANSS DCC leo ANSS NEW US ?H? 2006,346,20:52:00 2006,346,20:52:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE S 2507 Station down. NEW/ 2006,346,20:52 -> 352,21:22 No Data END **************************************************************************** DATA PROBLEM REPORT ASL2002:072 2002/07/23 ASL DCC Valerie Peyton ASL MA2 IU */* 2002,199,07:30:00 2002,207,18:10:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 440 Clock Unlocked. The MA2 clock is not locked on to the GPS timing standard. We are trying to diagnose the cause of the problem. Timing accuracy cannot be guaranteed during this time period. END PROBLEM RESOLUTION REPORT ASL2002:072 2002/07/29 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION We are not sure what the MA2 station operator did, but it has improved GPS reception to the point that the clock is once more locking on to the GPS standard and providing reliably-timed data. END **************************************************************************** DATA PROBLEM REPORT ANSS2007:006 2007/01/16 ANSS DCC leo ANSS JFWS US ?H? 2006,348,03:34:00 2006,365,23:59:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE S 2507 Station down. JFWS/ 2006,348,03:34->2006,265,23:59 NO DATA Available Station Down END **************************************************************************** DATA PROBLEM REPORT HRV1996:025 1996/07/07 Harvard WQC Misha Salganik DMC KMI CD LHN LHE LHZ 1996,154,02:52:00 1996,154,02:52:00 Problem Description INVALID RESPONSE The amplitude of the observed seismograms is smaller than expected. Postscript file was placed into /pub/qc/qc_ps. END PROBLEM RESOLUTION REPORT HRV1996:025 1996/09/11 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION The KMI response files are now valid. It should be noted that KMI has a rather unique response. The low-frequency corner does not go out as far as most of the STS-1s we use. Sometime this year, the KMI instruments will be modified to have a very broad-band response. END **************************************************************************** DATA PROBLEM REPORT HRV1996:026 1996/08/04 Harvard WQC Misha Salganik ASL SFJ IU BH* LH* 1996,000,82:03:24 1996,000,82:03:24 Problem Description OTHER Postscript file was placed into /pub/qc/qc_ps. END PROBLEM RESOLUTION REPORT HRV1996:026 1996/08/12 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION The field engineers who installed the station were still on site at this time. The seismometers were not connected during the time where the channels are dead. >From 1996,081 through 1996,088 there are several occurrences of "dead channels". Calibrations are also present during this time frame. END **************************************************************************** DATA PROBLEM REPORT HRV1996:023 1996/07/07 Harvard WQC Misha Salganik DMC YAK IU LHN LHE 1996,000,56:03:08 1996,000,56:03:08 Problem Description POLARITY REVERSED Postscript file was placed into /pub/qc/qc_ps. END PROBLEM RESOLUTION REPORT HRV1996:023 1996/08/12 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION No change in status, the channels are still reversed. See HRV1994:067 for more detail. END **************************************************************************** DATA PROBLEM REPORT HRV1996:024 1996/07/07 Harvard WQC Misha Salganik DMC FFC II LHZ 1996,178,03:22:00 0960,178,02:00:00 Problem Description LOW FREQUENCY NOISE Postscript file was placed into /pub/qc/qc_ps. END **************************************************************************** DATA PROBLEM REPORT HRV1996:029 1996/10/18 Harvard WQC Misha Salganik SPYDER NIL II LH* VH* 1996,288,23:26:00 1996,288,23:26:00 Problem Description OTHER It looks like a digitizer problem. Postscript file was placed into /pub/qc/qc_ps. END PROBLEM RESOLUTION REPORT HRV1996:029 1997/05/29 IDA Peter Davis Description of Problem Resolution RESOLUTION See HRV1995:119. END **************************************************************************** DATA PROBLEM REPORT HRV1996:027 1996/09/11 Harvard WQC Misha Salganik SPYDER MDJ CD LHN LHZ 1996,101,00:19:00 1996,101,00:19:00 Problem Description OTHER Amplituide of the observed seismograms is too small. Postscript file was placed into /pub/qc/qc_ps. END PROBLEM RESOLUTION REPORT HRV1996:027 2007/01/19 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The CD/MDJ digitizer was old and beginning to fail. This caused a variety of problems in the data, including inaccurate recording of background noise and events. For the full duration of this and other digitizer-related problems, please see HRV1995:051. END **************************************************************************** DATA PROBLEM REPORT HRV1996:028 1996/04/19 Harvard WQC Misha Salganik ASL YSS IU BHE LHE 1996,110,00:19:00 1996,110,00:19:00 Problem Description OTHER Postscript file was placed into /pub/qc/qc_ps. END **************************************************************************** DATA PROBLEM REPORT ASL2002:088 2002/09/16 ASL DCC Valerie Peyton ASL RCBR IU 10/* 2002,259,13:58:00 2002,260,19:27:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4105 Seismometer not connected to digitizer. The CMG3-T-B at RCBR has been removed from its borehole for repairs. ASL field engineers on site are hoping the repairs will not take long. Until they are finished, the 10 channels will be recording digitizer noise. END PROBLEM RESOLUTION REPORT ASL2002:088 2002/09/19 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The CMG3-T-B at RCBR has been repaired and returned to its borehole. Data quality is much improved, but tests are still being run while our maintenance team is on-site. For the full duration of the maintenance visit, please see ASL2002:090. END **************************************************************************** DATA PROBLEM REPORT HRV1996:021 1996/07/07 Harvard WQC Misha Salganik SPYDER NIL II LHZ LHE 1996,181,04:46:00 1996,181,04:46:00 Problem Description LOW FREQUENCY NOISE Postscript file was placed into /pub/qc/qc_ps. END **************************************************************************** DATA PROBLEM REPORT ASL2002:089 2002/09/18 ASL DCC Valerie Peyton ASL RCBR IU */* 2002,248,15:54:00 2002,264,20:00:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 452 Timing IS in error, as clock is unlocked. The RCBR station clock is unlocked. Timing is currently bad, and the timing standard is drifting at a rough rate of -3 seconds per day. We are investigating the cause of the problem, and currenlty believe it to be a broken QVI board. If replacement parts are needed, it may take some time to get them through customs to the station to fix the problem. END PROBLEM RESOLUTION REPORT ASL2002:089 2002/09/27 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION One of our field engineers was on site at RCBR and replaced the broken QVI board. Timing is good as of 2002, 264, 20:00. END **************************************************************************** DATA PROBLEM REPORT HRV1996:022 1996/07/07 Harvard WQC Misha Salganik DMC SPA IU LHE 1996,000,49:02:25 1996,000,49:02:25 Problem Description POLARITY REVERSED Postscript file was placed into /pub/qc/qc_ps. END **************************************************************************** DATA PROBLEM REPORT ASL2002:084 2002/08/23 ASL DCC Valerie Peyton ASL OTAV IU 00/* 2002,234,16:30:00 2002,312,16:49:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. All three of the STS1 channels at OTAV are currently recording digitizer noise. We are looking into the source of the problem. END PROBLEM RESOLUTION REPORT ASL2002:084 2002/11/08 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The OTAV station operator managed to fix two of the three STS1 components. At 2002, 312, 16:49, data quality returns to normal for the Z and N. The E is now broken for new reasons. The full duration of the E problem can be found in ASL2002:101. END **************************************************************************** DATA PROBLEM REPORT ASL2002:085 2002/08/26 ASL DCC Valerie Peyton ASL LVC IU 00/*HN 00/*HE 2002,235,20:57:00 2002,235,20:57:00 Problem Description OTHER SEED COMMENT REFERENCE C 4631 Slight response change from incorrect feedback electronics box In an effort to diagnose a problem with the STS1 E component at LVC, the feedback electronics boxes of the STS1 N and E components at LVC are temporarily swapped. This means that there is a very slight change in response and sensitivity (total effect is less than 1%) for these two components during this time period. END **************************************************************************** DATA PROBLEM REPORT ASL2002:086 2002/08/27 ASL DCC Valerie Peyton ASL RCBR IU 10/*H2 2002,237,12:54:00 2002,260,19:27:00 Problem Description NOISE SEED COMMENT REFERENCE C 4500 Channel has high noise background. The 2 component (nominal E) of the CMG3-T-B at RCBR has developed the same noise problem at the 1 component: high levels of low frequency noise. The source of the noise has not been determined, but we believe it is a problem with the component itself. The noise levels vary, but gradually worsen. By 2002, 237, 12:54 the low frequency noise begins at 0.19Hz and continues into all the lower frequencies. The noise amplitude is anywhere from 2 to 50dB above the background noise for the other two components of the instrument. At this time, a high frequency noise problem also develops: High frequency noise levels are 2 to 6dB higher than they should be in the 1Hz - 6Hz range. END PROBLEM RESOLUTION REPORT ASL2002:086 2002/09/19 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION An ASL maintenance team visited RCBR and was able to repair the CMG3-T-B on-site. The noise problem was caused by physically blown capacitors in the sensor's electronics. Data quality returns to normal at 2002, 260, 19:27. END **************************************************************************** DATA PROBLEM REPORT ASL2002:087 2002/09/05 ASL DCC Valerie Peyton ASL HIA IC 00/*HN 2002,245,05:49:00 2002,288,08:13:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4620 Incorrect instrument response for low frequencies only In an effort to keep the Z component of the STS1 at HIA working at its best, we have transferred a problem from the Z to the N. The source of the problem is a faulty feedback box. The problems in the feedback box cause the instrument response to be corrupted below 0.1 Hz. In addition, the instrument sometimes produces a ringing signal which obscures all the data. Replacement parts are being shipped to the station and hopefully will arrive soon. END PROBLEM RESOLUTION REPORT ASL2002:087 2002/10/22 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION A replacement feedback box was sent to HIA. The station operator has installed it. Data quality returns to normal at 2002, 288, 08:13. As far as we know, the N component is now working with its original feedback box, and the Z component is operating with the replacement feedback box. END **************************************************************************** DATA PROBLEM REPORT ASL2002:080 2002/08/13 ASL DCC Valerie Peyton ASL RCBR IU 10/*H1 2002,223,08:23:00 2002,228,06:59:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. Something caused the 1 (nominal N) component of the CMG3-T-B at RCBR to fall against one of its stops. The operator will recenter the instrument at the earliest opportunity. END PROBLEM RESOLUTION REPORT ASL2002:080 2002/08/16 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The RCBR station operator recentered the CMG3-T-B on 2002, 228, 06:59. Data quality is improved to the extent that the mass is no longer pegged. However, the noise problem on the 1 component is now worse than it was before the mass fell against one of its stops. For more information on this noise problem, please see ASL2002:001. END **************************************************************************** DATA PROBLEM REPORT ASL2002:081 2002/08/15 ASL DCC Valerie Peyton ASL GUMO IU 10/*HE 2002,226,13:58:00 2002,226,19:50:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. A fairly close event (from the Mariana Islands) of magnitude 6.5 caused the E component of the CMG3-T at GUMO to fall against a stop. The internet to GUMO is currently down, but as soon as it comes up either we will recenter the instrument or the station operator will read his email and recenter the instrument. Either way, it shouldn't be too long before the problem is fixed. END PROBLEM RESOLUTION REPORT ASL2002:081 2002/08/16 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The GUMO station operator recentered the CMG3-T roughly 6 hours after the E component pegged. Data quality returns to normal at 2002, 226, 19:50. END **************************************************************************** DATA PROBLEM REPORT ASL2002:082 2002/08/19 ASL DCC Valerie Peyton ASL BILL IU 00/*HN 2002,228,04:21:00 2002,232,00:39:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The N component of the STS1 at BILL has fallen against one of the stops. Data are not usuable. We have asked the station operator to recenter the instrument at the next available opportunity. END PROBLEM RESOLUTION REPORT ASL2002:082 2002/08/20 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The BILL station operator recentered the N component of the STS1 at 2002, 232, 00:39. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2002:083 2002/08/21 ASL DCC Valerie Peyton ASL ULN IU */* 2002,214,00:00:00 2003,267,20:52:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 453 Timing MAY be in error, as the GPS antenna has poor sky visibility. Even though the clock system at ULN is working well, the GPS antenna has a poor view of the sky. At best, timing is good to within +/- 0.01 seconds; at worst, it is only good to within +/- 0.1 seconds. We have shipped a longer cable for the GPS antenna and the station operator will soon place it in a position that allows for better sky visibility. END PROBLEM RESOLUTION REPORT ASL2002:083 2003/10/02 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The GPS system was replaced and locked back onto the GPS timing standard at 2003, 267, 20:52. It appears that with the replacement GPS system, the sky visibility problem has also been resolved. Timing in the data is correct as of this time. END **************************************************************************** DATA PROBLEM REPORT ASL2002:099 2002/11/07 ASL DCC Valerie Peyton ASL SPA IU 00/*HE 2002,310,02:45:00 2002,312,02:31:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4625 Invalid instrument response. The E component of the STS1 at SPA appears to have lost half of its double-ended output. The shape of the response curve is correct, but the amplitude is anywhere from 10dB to 30dB too quiet. We are investigating the cause of the problem. END PROBLEM RESOLUTION REPORT ASL2002:099 2002/11/08 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION While the SPA station operator was in the vault trying to diagnose the problem with the STS1 E component, the seismometer mysteriously regained its full double-ended output. The source of the problem has still not been determined, and we anticipate the problem will recur, but for now the instrument response is once more correct. Data quality returns to normal at 2002, 312, 02:31. END **************************************************************************** DATA PROBLEM REPORT HRV1996:030 1996/10/18 Harvard WQC Misha Salganik DMC NRIL II LH* 1996,132,13:43:00 1996,132,13:43:00 Problem Description INCORRECT LOCATION Amplitude of the observed seismograms is too small. Postscript file was placed into /pub/qc/qc_ps. END PROBLEM RESOLUTION REPORT HRV1996:030 1996/10/21 IDA Peter Davis Description of Problem Resolution COMMENT An analysis of tidal amplitudes over the period 1996,229- 1996,255 indicates that at least the amplitude of the principal solar and lunar tides observed on the STS1 vertical are correctly predicted by the calibration information we publish for NRIL. We are at a loss to explain the observations noted in this DPR but will continue to monitor the sensor performance. END **************************************************************************** DATA PROBLEM REPORT ASL2002:095 2002/10/16 ASL DCC Tyler Storm ASL LVC IU 10/?H? 2002,288,22:51:00 2002,294,22:23:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. Data from the Guralp CMG3-t are unuseable. END PROBLEM RESOLUTION REPORT ASL2002:095 2002/10/22 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The LVC station operator recentered the CMG3-T at 2002, 294, 22:23. Data quality has returned to normal. END **************************************************************************** DATA PROBLEM REPORT ASL2002:096 2002/10/24 ASL DCC Valerie Peyton ASL INCN IU */* 2002,278,12:03:00 2002,308,11:00:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 452 Timing IS in error, as clock is unlocked. A lightning strike has destroyed the GPS receiver system at INCN. The station clock is therefore unlocked and timing is unreliable. Replacement parts have been shipped and will be installed as soon as possible. END PROBLEM RESOLUTION REPORT ASL2002:096 2002/11/12 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The INCN operator installed all the GPS system replacement parts, which fixed the clock problems. Timing quality returns to normal at 2002, 308, 11:00. END **************************************************************************** DATA PROBLEM REPORT ASL2002:097 2002/10/30 ASL DCC Valerie Peyton ASL SPA IU 00/*HE 2002,303,03:51:00 2002,303,23:10:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4625 Invalid instrument response. The E component of the STS1 at SPA appears to have lost half of its double-ended output. The shape of the response curve is correct, but the amplitude is anywhere from 10dB to 30dB too quiet. We are investigating the cause of the problem. END PROBLEM RESOLUTION REPORT ASL2002:097 2002/10/31 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION While the SPA station operator was in the vault solving a problem with the STS-1 N component, the STS-1 E component managed to solve its own problem. We do not know why the E component lost half of its double-ended output, or how it regained the same. Regardless, data quality returns to normal at 2002, 303, 23:10. END **************************************************************************** DATA PROBLEM REPORT ASL2002:098 2002/10/30 ASL DCC Valerie Peyton ASL SPA IU 00/*HN 2002,303,03:51:00 2002,303,23:10:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The N component of the STS-1 at SPA is oscillating with a 1000 second period, rendering the data useless. END PROBLEM RESOLUTION REPORT ASL2002:098 2002/10/31 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The SPA station operator reset the STS-1 N component, curing the oscillation problem. Data quality returns to normal at 2002, 303, 23:10. END **************************************************************************** DATA PROBLEM REPORT ASL2002:091 2002/09/24 ASL DCC Tyler Storm ASL JOHN IU 00/* 2002,212,08:00:00 2002,266,13:36:00 Problem Description VERY LARGE PULSE SEED COMMENT REFERENCE C 4410 Channel data quality is poor. Data from the KS54000 are seriously degraded. We have been seeing very large pulses on all components (much worse on the vertical) since 2002,212. The pulses are getting worse as time goes on. END PROBLEM RESOLUTION REPORT ASL2002:091 2003/11/03 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION All three components of the 54000 at JOHN are completely dead by 2002, 266, 13:36. For the rest of the story, please see ASL2003:203. END **************************************************************************** DATA PROBLEM REPORT ASL2002:092 2002/09/25 ASL DCC Tyler Storm ASL AFI IU 00/?HN 2002,231,11:00:00 2002,299,01:13:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. Data from the N/S STS-1 are unuseable; instrument mass is pegged. END PROBLEM RESOLUTION REPORT ASL2002:092 2002/12/30 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION Back to normal at 2002,299,01:13. END **************************************************************************** DATA PROBLEM REPORT ASL2002:093 2002/09/26 ASL DCC Valerie Peyton ASL LVC IU 10/*HE 2002,268,15:40:00 2002,272,21:10:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The E component of the CMG3-T has fallen against one of its stops. Data are unuseable. END PROBLEM RESOLUTION REPORT ASL2002:093 2002/09/30 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The LVC station operator recentered the CMG3-T on 2002, 272, 21:10. Data quality returned to normal. END **************************************************************************** DATA PROBLEM REPORT ASL2002:094 2002/09/27 ASL DCC Valerie Peyton ASL TATO IU 10/*H* 2002,270,06:37:00 2002,270,06:49:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The TATO station operator is swapping the low gain STS-2 for a high gain STS-2 in an effort to diagnose a noise problem on the low gain STS-2. Data are unusable for this time period. END PROBLEM RESOLUTION REPORT ASL2002:094 2002/09/27 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The TATO station operator swapped the two STS-2s in a little over 10 minutes. Data quality returns to normal at 2002, 270, 06:49. END **************************************************************************** DATA PROBLEM REPORT ASL2002:090 2002/09/19 ASL DCC Valerie Peyton ASL RCBR IU */* 2002,259,13:54:00 2002,266,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. Field engineers on location for station maintenance. Tests may be in progress. The activity of the engineers near the borehole will compromise data quality and availability during this time period. END PROBLEM RESOLUTION REPORT ASL2002:090 2002/09/27 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The ASL field engineers fixed the CMG3-T-B, replaced the QVI board, and generally made the station work much better. Data quality is much better for the minor maintenance disturbances. END **************************************************************************** DATA PROBLEM REPORT DMC93:001 1993/06/18 DMC Tim Ahern DMC PFO II ??? 1992,246,00:00:00 1992,246,00:00:00 Problem Description INCORRECT TIME Comparing data from the PFO II data logger and the PFO TERRAscope (TS) station running at the same location shows a systematic difference in the time at the two stations. Recent discussions lead us to the conclusion that the problem was with the II station and not the TERRAscope station. It appears that the II station time tags the data about 900 ms earlier than the TERRAscope data logger END PROBLEM RESOLUTION REPORT DMC93:001 1993/06/21 IDA Holly Given Description of Problem Resolution We have confirmed that the time on IDA PFO data from 92:039:21:50 through 92:357 is off by 890 to 900 milliseconds. To correct this data, subtract 890 milliseconds from the time. This problem affected data from all components and sample rates. The problem was traced to a wiring error inside the data acquisition system that inverted the 1-Hz time pulse, which consists of a square wave every second with duration 100-110 msec. This caused the software to misassociate the timing interrupt with the next absolute time string. The wiring error has been repaired. All data from 92:358 until 93:147 distributed by the DMC before June 22, 1993 for the IRIS/IDA station at PFO also has this timing error. Data distributed after June 28 has been corrected. (T. Ahern) END **************************************************************************** DATA PROBLEM REPORT ASL2006:121 2006/04/17 ASL DCC Valerie Peyton ASL CHTO IU 10/* 2006,106,00:33:00 2006,117,08:12:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The CHTO STS2 is producing digitizer noise. Data are not useable. END **************************************************************************** DATA PROBLEM REPORT ASL2006:122 2006/04/17 ASL DCC Valerie Peyton ASL WAKE IU 20/*H* 2006,105,03:18:00 2006,105,07:27:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4620 Incorrect instrument response for low frequencies only The WAKE STS2 lost 5 - 50dB of its response below 1Hz. END **************************************************************************** DATA PROBLEM REPORT ASL2006:123 2006/04/17 ASL DCC Valerie Peyton ASL KIP IU 00/* 2006,095,12:49:00 2006,096,01:37:00 Problem Description OTHER SEED COMMENT REFERENCE C 1840 Calibration data Calibrations were run on the KIP STS1 seismometers during this time. END **************************************************************************** DATA PROBLEM REPORT ASL2006:124 2006/04/17 ASL DCC Valerie Peyton ASL NWAO IU 00/*H* 2006,074,14:10:00 2006,075,02:43:00 Problem Description OTHER SEED COMMENT REFERENCE C 1840 Calibration data Calibrations were run on the NWAO 54000 seismometer during this time. END **************************************************************************** DATA PROBLEM REPORT ASL2006:120 2006/04/17 ASL DCC Valerie Peyton ASL HKT IU 00/*HE 2006,106,04:06:00 2006,110,15:26:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The E component of the STS1 at HKT has fallen against one of its stops. Data are not useable. END **************************************************************************** DATA PROBLEM REPORT ASL2006:129 2006/04/25 ASL DCC Valerie Peyton ASL HRV IU *HE *HN 1996,339,13:00:00 2006,116,00:00:00 Problem Description INVALID RESPONSE Research and testing showed that the N and E components of the STS1 set at HRV had non-standard responses starting at 1996, 339, 13:00. In March of 2006, their actual response was experimentally tested, and poles and zeroes calculated. These calculated poles and zeroes were subsequently entered into the IU/HRV dataless. END **************************************************************************** DATA PROBLEM REPORT IDA2010:040 2010/10/22 IDA DCC Erik Klimczak IDA MBAR II *** 2010,217,00:00:00 2010,217,00:00:00 Problem Description OTHER There have been ongoing problems with the VSAT telemetry link to MBAR since day 2010,217 (Aug. 5,2010). A replacement satellite modem was configured and shipped to the station. The station operator is currently planning a station visit to replace the satellite modem. END **************************************************************************** DATA PROBLEM REPORT ASL2006:125 2006/04/18 ASL DCC Valerie Peyton ASL MAJO IU */* 2006,108,00:57:00 2006,115,04:02:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. An ASL field engineer is on site at MAJO for station maintenance. Expect variable data quality and availability, as well as tests and calibrations. END **************************************************************************** DATA PROBLEM REPORT ASL2006:126 2006/04/20 ASL DCC Tyler Storm ASL KONO IU 10/?H? 2005,158,16:50:00 2006,319,18:30:00 Problem Description HIGH FREQUENCY NOISE SEED COMMENT REFERENCE C 4508 Channel has high levels of high frequency noise. Data contain high-frequency noise (2hz and higher). END PROBLEM RESOLUTION REPORT ASL2006:126 2006/11/20 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The KONO CMG3-T was replaced. This fixed the high frequency noise problem. Data quality returns to normal at 2006, 319, 18:30. END **************************************************************************** DATA PROBLEM REPORT ASL2006:127 2006/04/24 ASL DCC Valerie Peyton ASL ENH IC 10/* 2006,112,10:57:00 2006,112,10:57:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The STS2 at ENH has malfunctioned. Data are not useable. END **************************************************************************** DATA PROBLEM REPORT ASL2006:128 2006/04/25 ASL DCC Valerie Peyton ASL POHA IU */* 2006,114,21:44:00 2006,117,00:06:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. An ASL field team is on site at POHA for station maintenance. Expect variable data quality and availability, as well as tests and calibrations. END **************************************************************************** DATA PROBLEM REPORT ASL2006:132 2006/05/02 ASL DCC Valerie Peyton ASL KIP IU */* 2006,118,21:43:00 2006,123,13:52:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. An ASL field team is on site at KIP for station maintenance. Expect variable data availability and quality, as well as tests and calibrations. END **************************************************************************** DATA PROBLEM REPORT ASL2006:133 2006/05/03 ASL DCC Valerie Peyton ASL GUMO IU 00/* 2006,122,22:50:00 2006,265,02:09:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. All three channels of the 54000 borehole seismometer at GUMO have gone to digitizer noise simultaneously. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2006:133 2006/10/05 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The GUMO 54000 was replaced. Data quality returns to normal at 2006, 265, 02:09. END **************************************************************************** DATA PROBLEM REPORT ASL2006:134 2006/05/03 ASL DCC Valerie Peyton ASL SDV IU */* 2006,122,03:20:00 2006,122,09:42:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 454 Timing MAY be in error, as GPS system is not operating consistently. The GPS system at SDV was not able to obtain a solid lock on the GPS satellites during this time. This caused the GPS system to not operate consistently, and produced timing jumps. Data should be used with caution. END **************************************************************************** DATA PROBLEM REPORT ASL2006:135 2006/05/10 ASL DCC Valerie Peyton ASL SSPA IU */* 2006,125,00:20:00 2006,126,21:11:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. An ASL field engineer is on site at SSPA for station maintenance. Expect variable data quality and availability, as well as tests. END **************************************************************************** DATA PROBLEM REPORT ASL2006:130 2006/05/01 ASL DCC Valerie Peyton ASL QSPA IU 20/* 2006,120,12:08:00 2006,122,12:34:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. All three components of the QSPA STS2 have fallen against their stops. Initially, very large events may be visible. Otherwise, data are not useable. END **************************************************************************** DATA PROBLEM REPORT ASL2006:131 2006/05/01 ASL DCC Valerie Peyton ASL CHTO IU */* 2006,117,05:12:00 2006,128,08:47:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. An ASL field engineer is on site at CHTO for station maintenance. Expect variable data quality and availability, as well as calibrations and other tests. DNC END **************************************************************************** DATA PROBLEM REPORT ASL2006:136 2006/05/11 ASL DCC Valerie Peyton ASL TRIS IU 00/*H* 2006,131,10:06:00 2006,157,11:39:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The TRIS STS1 Z data streams are dead. It looks like there is a problem with the digitizer's QDP board. END **************************************************************************** DATA PROBLEM REPORT ASL2006:137 2006/05/15 ASL DCC Valerie Peyton ASL CHTO IU 10/*HE 10/*HN 2006,124,07:59:00 2006,127,10:39:00 Problem Description CHANNEL ORIENTATION SEED COMMENT REFERENCE C 1826 Instrument orientation is unknown. During a maintenance visit, an ASL field engineer determined that the CHTO STS2 had been installed with incorrect orientation. The original orientation was roughly 31 degrees east of north. The IU/CHTO dataless reflects this original incorrect orientation from 2006, 080, 08:00 to 2006, 124, 07:59. During the time frame of this problem report, the field engineer was attempting to find true north. Consequently, the CHTO STS2 orientation is ambiguously incorrect for these three days. END **************************************************************************** DATA PROBLEM REPORT ASL2006:138 2006/05/16 ASL DCC Valerie Peyton ASL CHTO IU ?L? 10/?L? 10/?N? 20/?N? 1993,322,00:00:00 2006,120,11:45:00 Problem Description CHANNEL ORIENTATION SEED COMMENT REFERENCE C 1826 Instrument orientation is unknown. The CHTO FBA23 was not bolted to the floor when originally installed. Also, no north line was drawn on the floor where the FBA23 was installed. Consequently, the actual orientation of the instrument is indeterminate during this time period. In addition, the FBA23 data cable was wired with reversed polarity from installation. END **************************************************************************** DATA PROBLEM REPORT ASL2006:139 2006/05/17 ASL DCC Valerie Peyton ASL HRV IU * 2006,132,20:56:00 2006,137,17:19:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 451 Timing MAY be in error, as clock is unlocked. The HRV GPS receiver is not able to lock onto the GPS timing signal. Time stamps in the data should be considered unreliable. END **************************************************************************** DATA PROBLEM REPORT ASL2006:100 2006/03/29 ASL DCC Valerie Peyton ASL FUNA IU 00/*H* 2004,021,20:24:00 2006,083,00:00:00 Problem Description INVALID RESPONSE We discovered that the IU/FUNA dataless contained incorrect poles and zeroes for the STS1 Z component. From installation until this discovery, the IU/FUNA STS1 Z poles and zeroes were reported with a 5Hz high frequency corner. The instrument itself has a 10Hz high frequency corner. END **************************************************************************** DATA PROBLEM REPORT ASL2006:101 2006/03/29 ASL DCC Valerie Peyton ASL RAO IU 00/*H* 2004,200,00:00:00 2006,083,00:00:00 Problem Description INVALID RESPONSE We discovered that the IU/RAO dataless contained incorrect poles and zeroes for the STS1 Z component. From installation until this discovery, the IU/RAO STS1 Z poles and zeroes were reported with a 5Hz high frequency corner. The instrument itself has a 10Hz high frequency corner. END **************************************************************************** DATA PROBLEM REPORT ASL2006:102 2006/03/29 ASL DCC Valerie Peyton ASL TRIS IU 00/*H* 2004,063,00:00:00 2006,083,00:00:00 Problem Description INVALID RESPONSE We discovered that the IU/TRIS dataless contained incorrect poles and zeroes for the STS1 Z component. From installation until this discovery, the IU/TRIS STS1 Z poles and zeroes were reported with a 5Hz high frequency corner. The instrument itself has a 10Hz high frequency corner. END **************************************************************************** DATA PROBLEM REPORT ASL2006:107 2006/04/05 ASL DCC Valerie Peyton ASL LVC IU 00/* 2006,094,12:52:00 2006,095,01:35:00 Problem Description OTHER SEED COMMENT REFERENCE C 1840 Calibration data Calibrations were run on the LVC STS1 seismometers during this time. END **************************************************************************** DATA PROBLEM REPORT ASL2006:109 2006/04/07 ASL DCC Valerie Peyton ASL TIXI IU 00/*HZ 2006,096,20:44:00 2006,097,13:20:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The TIXI STS1 Z has gone into an overdriven oscillation with a period of ~880 seconds. Data are not useable. END **************************************************************************** DATA PROBLEM REPORT ASL2006:103 2006/03/30 ASL DCC Valerie Peyton ASL FUNA IU 00/* 2006,088,14:07:00 2006,089,00:38:00 Problem Description OTHER SEED COMMENT REFERENCE C 1840 Calibration data Calibrations were run on the FUNA STS1 Z instrument during this time. END **************************************************************************** DATA PROBLEM REPORT ASL2006:104 2006/03/30 ASL DCC Valerie Peyton ASL FUNA IU 10/* 2006,089,00:53:00 2006,089,09:44:00 Problem Description OTHER SEED COMMENT REFERENCE C 1840 Calibration data Calibrations were run on the FUNA STS2 seismometer during this time. END **************************************************************************** DATA PROBLEM REPORT ASL2006:105 2006/04/04 ASL DCC Valerie Peyton ASL HNR IU 00/* 2006,093,13:16:00 2006,094,02:14:00 Problem Description OTHER SEED COMMENT REFERENCE C 1840 Calibration data Calibrations were run on the HNR 54000 instrument during this time. END **************************************************************************** DATA PROBLEM REPORT ASL2006:106 2006/04/04 ASL DCC Valerie Peyton ASL HNR IU 10/* 2006,094,02:28:00 2006,094,11:20:00 Problem Description OTHER SEED COMMENT REFERENCE C 1840 Calibration data Calibrations were run on the HNR STS2 instrument during this time. END **************************************************************************** DATA PROBLEM REPORT ASL2006:110 2006/04/10 ASL DCC Valerie Peyton ASL KMBO IU 10/*H* 2006,098,02:51:00 2006,208,14:12:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. All three channels of the STS2 at KMBO are dead. END PROBLEM RESOLUTION REPORT ASL2006:110 2006/08/09 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The problems with the STS2 at KMBO were fixed during a maintenance visit. Data quality returns to normal at 2006, 208, 14:12. END **************************************************************************** DATA PROBLEM REPORT ASL2006:111 2006/04/10 ASL DCC Valerie Peyton ASL PMG IU 00/* 2006,096,12:50:00 2006,097,01:34:00 Problem Description OTHER SEED COMMENT REFERENCE C 1840 Calibration data Calibrations were run on the PMG STS1 seismometers during this time. END **************************************************************************** DATA PROBLEM REPORT ASL2006:112 2006/04/10 ASL DCC Valerie Peyton ASL PMG IU 10/* 2006,097,01:27:00 2006,097,13:17:00 Problem Description OTHER SEED COMMENT REFERENCE C 1840 Calibration data Calibrations were run on the PMG CMG3-T seismometer during this time. END **************************************************************************** DATA PROBLEM REPORT ASL2006:113 2006/04/11 ASL DCC Valerie Peyton ASL QSPA IU 20/* 2006,100,15:33:00 2006,104,13:35:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. All three components of the QSPA STS2 have fallen against their stops. Initially, very large events may be visible. Otherwise, data are not useable. END **************************************************************************** DATA PROBLEM REPORT ASL2006:118 2006/04/13 ASL DCC Valerie Peyton ASL OTAV IU 10/*HN 10/*HE 2006,103,03:36:00 2006,103,15:28:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The OTAV CMG3-T horizontal components have fallen against their stops. Data are not useable. END **************************************************************************** DATA PROBLEM REPORT ASL2006:119 2006/04/14 ASL DCC Tyler Storm ASL LSA IC 10/?HE 2006,104,01:30:38 2006,121,20:42:00 Problem Description VERY LARGE PULSE SEED COMMENT REFERENCE C 4410 Channel data quality is poor. Data quality is poor; large negative pulses. END **************************************************************************** DATA PROBLEM REPORT ASL2006:114 2006/04/13 ASL DCC Valerie Peyton ASL INCN IU */* 2006,103,00:22:00 2006,105,08:53:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. An ASL field engineer is on-site at INCN with the station operator for station maintenance. Expect variable data quality and availability, as well as calibrations and other tests. END **************************************************************************** DATA PROBLEM REPORT ASL2006:115 2006/04/13 ASL DCC Valerie Peyton ASL PAB IU 00/*H* 2006,101,12:41:00 2006,101,21:30:00 Problem Description OTHER SEED COMMENT REFERENCE C 1840 Calibration data Calibrations were run on the PAB STS1 instruments during this time. END **************************************************************************** DATA PROBLEM REPORT ASL2006:116 2006/04/13 ASL DCC Valerie Peyton ASL OTAV IU 00/* 2006,102,12:49:00 2006,103,01:32:00 Problem Description OTHER SEED COMMENT REFERENCE C 1840 Calibration data Calibrations were run on the OTAV STS1 seismometers during this time. END **************************************************************************** DATA PROBLEM REPORT ASL2006:117 2006/04/13 ASL DCC Valerie Peyton ASL OTAV IU 10/* 2006,103,03:37:00 2006,103,05:36:00 Problem Description OTHER SEED COMMENT REFERENCE C 1840 Calibration data Calibrations were run on the OTAV CMG3-T during this time. END **************************************************************************** DATA PROBLEM REPORT IDA2010:003 2010/01/28 IDA DCC Erik Klimczak IDA NNA II *** 2009,331,00:00:00 2009,335,00:00:00 Problem Description OTHER IDA station NNA was down from day 2009,331-01:14 to 2009,335-21:36 due to problems with the DAS. The station came back on-line after the station operator reconnected a cable from the digitizer to a switch onsite. END **************************************************************************** DATA PROBLEM REPORT ASL2006:165 2006/07/04 ASL DCC Valerie Peyton ASL LBTB GT BHZ LHZ VHZ 1998,009,14:21:00 1999,343,02:37:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4630 Response may be invalid. We are seeing intermittent "single-ended" output from the vertical borehole 54000 sensors. Between these episodes, the sensor response is correct. This is the same problem pointed out earlier in ASL98:000. The first time we saw this problem it went away before we could troubleshoot it. GTSN field engineers are currently working with the local techs to pinpoint the failure. END PROBLEM RESOLUTION REPORT ASL2006:165 2007/01/12 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The LBTB 54000 Z response problems end at 1999, 343, 02:37. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT IDA2010:004 2010/01/28 IDA DCC Erik Klimczak IDA TAU II *** 2009,321,00:00:00 2009,330,00:00:00 Problem Description OTHER IDA station TAU was down from day 2009,321-10:27 to 2009,330-19:25 due to problems with the station computer. The station came back on-line after the station operator replaced the station computer. END **************************************************************************** DATA PROBLEM REPORT ASL2006:166 2006/07/12 ASL DCC Valerie Peyton ASL BILL IU 00/*HZ 2006,188,03:51:00 2006,209,21:22:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The BILL STS1 Z component has fallen against its stop. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2006:166 2006/07/31 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The BILL station operator recentered the STS1 Z component. Data quality returns to normal at 2006, 209, 21:22. END **************************************************************************** DATA PROBLEM REPORT IDA2010:005 2010/01/28 IDA DCC Erik Klimczak IDA MSVF II *** 2009,335,00:00:00 2009,335,00:00:00 Problem Description OTHER IDA station MSVF has been down intermittently from day 2009,335 to 2009,341, 2009,348 to 2010,010, and day 2010,021 to present due to power problems at the station. The GPS clock at the station has also been intermittently unlocked. END PROBLEM RESOLUTION REPORT IDA2010:005 2012/05/15 IDA Erik Klimczak Description of Problem Resolution RESOLUTION An IDA engineer visited the station on 2010,205 and resolved the ongoing power problems by replacing the System back-up and UPS batteries, and reconfiguring the settings for the UPS. END **************************************************************************** DATA PROBLEM REPORT ASL2006:167 2006/07/12 ASL DCC Valerie Peyton ASL BILL IU 00/*HE 2006,189,00:10:00 2006,209,21:21:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The BILL STS1 E component has fallen against its stop. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2006:167 2006/07/31 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The BILL station operator recentered the STS1 E component. Data qualty returns to normal at 2006, 209, 21:21. END **************************************************************************** DATA PROBLEM REPORT IDA2010:006 2010/01/28 IDA DCC Erik Klimczak IDA CMLA II *** 2009,361,00:00:00 2009,361,00:00:00 Problem Description OTHER IDA station CMLA is down as of day 2009,361 due to problems with the DAS. A new MK8 DAS and GPS clock are being shipped to the station. END PROBLEM RESOLUTION REPORT IDA2010:006 2011/02/04 IDA Erik Klimczak Description of Problem Resolution RESOLUTION IDA station CMLA is back on-line as of day 2010,295 after an IDA engineer visited the station and restored data acquisition. However, all channels from the CMG-3T seismometer remain non-seismic due to a faulty CMG-3T sensor. END **************************************************************************** DATA PROBLEM REPORT ASL2006:168 2006/07/12 ASL DCC Valerie Peyton ASL ANMO IU 10/*HZ 2006,184,14:28:00 2006,187,07:20:00 Problem Description NOISE SEED COMMENT REFERENCE C 4508 Channel has high levels of high frequency noise. The Z component of the ANMO CMG3-T-B has developed a high frequency noise problem. Starting at 5Hz and continuing up through all the higher frequencies, this component is up to 15 dB noisier than it should be. The response curve in these frequencies also looks incorrect. This response problem simply is a result of whatever is causing noise on this component. END PROBLEM RESOLUTION REPORT ASL2006:168 2006/07/12 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The noise problem on the ANMO CMG3-T-B Z component disappeared of its own accord. Data quality returns to normal at 2006, 187, 07:20. END **************************************************************************** DATA PROBLEM REPORT ASL2006:161 2006/07/03 ASL DCC Valerie Peyton ASL FURI IU 10/*HZ 2006,111,04:35:00 2006,132,13:28:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The FURI CMG3-T Z component has fallen against its stop. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2006:161 2006/07/03 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The FURI CMG3-T was recentered. Z component data quality returns to normal at 2006, 132, 13:28. END **************************************************************************** DATA PROBLEM REPORT ASL2006:162 2006/07/03 ASL DCC Valerie Peyton ASL TEIG IU */* 2006,153,17:51:00 2006,156,15:50:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. The TEIG station operator is on-site for station maintenance. Expect variable data quality and availability. END PROBLEM RESOLUTION REPORT ASL2006:162 2006/07/03 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION TEIG station maintenance ended at 2006, 156, 15:50. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT IDA2010:001 2010/01/28 IDA DCC Erik Klimczak IDA ERM II *** 2009,281,00:00:00 2009,301,00:00:00 Problem Description OTHER IDA station ERM was down from day 2009,281-10:59 to 2009,301-18:51 due to a power outage caused by a typhoon. The station came back on-line after the station operator visited the station and restored power, and an IDA engineer cycled power to the DAS and ARS. END **************************************************************************** DATA PROBLEM REPORT ASL2006:163 2006/07/03 ASL DCC Valerie Peyton ASL TEIG IU 10/*HZ 2006,098,07:22:00 2006,156,15:50:00 Problem Description NOISE SEED COMMENT REFERENCE C 4504 Channel exibits high levels of low frequency noise. The Z component of the TEIG CMG3-T-B is exhibiting elevated levels of long- period noise. This noise is rooted in the fact that the mass position is quite far off center. END PROBLEM RESOLUTION REPORT ASL2006:163 2006/07/03 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION It was not possible to recenter the TEIG CMG3-T-B, but it was replaced. Data quality returns to normal at 2006, 156, 15:50. END **************************************************************************** DATA PROBLEM REPORT IDA2010:002 2010/01/28 IDA DCC Erik Klimczak IDA KWAJ II *** 2009,315,00:00:00 2009,322,00:00:00 Problem Description OTHER IDA station KWAJ was down from day 2009,315-22:01 to 2009,322-21:17 due to problems with the station computer. The station came back on-line after the station operator replaced a faulty hard drive in the ISP. END **************************************************************************** DATA PROBLEM REPORT ASL2006:164 2006/07/04 ASL DCC Valerie Peyton ASL LBTB GT BHN LHN VHN 1998,099,08:40:00 1998,105,09:09:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4630 Response may be invalid. We are seeing intermittent "single-ended" output from N/S borehole 54000 sensor. Between these episodes, the sensor response is correct. GTSN field engineers are currently working with the local techs to pinpoint the failure. END PROBLEM RESOLUTION REPORT ASL2006:164 2007/01/12 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The LBTB 54000 N response problems end at 1998, 105, 09:09. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2006:169 2006/07/13 ASL DCC Valerie Peyton ASL GNI IU BH* LH* VH* UH* 00/*H* 1991,191,00:00:00 2006,195,00:00:00 Problem Description INVALID RESPONSE We discovered that the IU/GNI dataless contained incorrect poles and zeroes for the STS1VBB components. From installation until this discovery, the IU/GNI STS1 poles and zeroes were reported with a 5Hz high frequency corner. The instruments themselves have the 10Hz high frequency corner. END PROBLEM RESOLUTION REPORT ASL2006:169 2006/07/13 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The IU/GNI dataless was updated with the correct poles and zeroes for the STS1 components after this discovery was made. The dataless now contains the correct poles and zeroes for all epochs of these instruments. If your copy of the dataless predates 2006, 195, please throw it away and replace it with the updated dataless, which contains the 10Hz high frequency corner poles and zeroes. The IU/GNI dataless volume can be obtained by contacting the IRIS DMC (www.iris.edu), or by accessing the ASL ftp site (aslftp.cr.usgs.gov). END **************************************************************************** DATA PROBLEM REPORT DMCQC2008:0059 2008/12/12 IRIS DMC Mary Templeton DMC PKME US ?H? 2008,349,16:27:00 2008,350,05:32:00 Problem Description DATA DROPOUTS One or more of the STS-2 masses drifted to the stops during this time span. END PROBLEM RESOLUTION REPORT DMCQC2008:0059 2008/12/12 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION Sensor was recentered 2008,350. END **************************************************************************** DATA PROBLEM REPORT DMCQC2008:0057 2008/12/16 IRIS DMC Gillian Sharer DMC FMP CI * 2008,302,07:36:00 2008,347,18:22:00 Problem Description INCORRECT TIME Timing at FMP is suspect during this time period. SeisNetWatch clock quality < 25%. END PROBLEM RESOLUTION REPORT DMCQC2008:0057 2008/12/16 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The problem appears to be fixed with a datalogger reboot on 2008 day 247 18:22 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2008:0058 2008/12/18 IRIS DMC Mary Templeton DMC GOGA US ?H? 2008,312,17:31:00 2008,337,03:57:00 Problem Description DEAD CHANNEL The borehole Guralp CMG-3T recorded only intermittently during this time span. The instrument recorded digitizer noise much of the time. END PROBLEM RESOLUTION REPORT DMCQC2008:0058 2008/12/18 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION This instrument appears to have been repaired or replaced in the field on 2008,337 and the sensor calibrated. END **************************************************************************** DATA PROBLEM REPORT DMCQC2008:0055 2008/11/21 IRIS DMC Mary Templeton DMC CNNC US ?H? 2008,320,12:12:00 2008,322,16:18:00 Problem Description DEAD CHANNEL One or more masses of this STS-2 have drifted against the stop and are not recording ground velocity. END PROBLEM RESOLUTION REPORT DMCQC2008:0055 2008/11/21 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION The sensor at CNNC was recentered. END **************************************************************************** DATA PROBLEM REPORT DMCQC2008:0056 2008/11/21 IRIS DMC Mary Templeton DMC CNNC US ?H? 2008,250,10:17:00 2008,252,15:27:00 Problem Description DEAD CHANNEL One or more masses of this STS-2 have drifted against the stop and are not recording ground velocity END PROBLEM RESOLUTION REPORT DMCQC2008:0056 2008/11/21 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION The sensor at CNNC was recentered. END **************************************************************************** DATA PROBLEM REPORT DMCQC2008:0053 2008/11/20 IRIS DMC Gillian Sharer DMC S19A TA * 2008,291,16:59:00 2008,303,21:37:00 Problem Description DEAD CHANNEL TA.S19A stopped recording accurate seismic data on day 291 17:00 UTC, after failing to respond to a mass recenter. During this time period, DC offsets were on the order of 1000000 counts. END PROBLEM RESOLUTION REPORT DMCQC2008:0053 2008/11/20 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION On 2008 day 303 21:37, the sensor was replaced. END **************************************************************************** DATA PROBLEM REPORT DMCQC2008:0054 2008/11/20 IRIS DMC Gillian Sharer DMC R25A TA * 2008,295,23:12:00 2008,304,17:15:00 Problem Description DEAD CHANNEL TA.R25A stopped recording seismic data after a lock/unlock on day 295 23:14 UTC. END PROBLEM RESOLUTION REPORT DMCQC2008:0054 2008/11/20 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION On 2008 day 304 17:15 UTC, the sensor was replaced. END **************************************************************************** DATA PROBLEM REPORT DMCQC2008:0051 2008/11/20 IRIS DMC Gillian Sharer DMC 219A TA [BL]HZ 2007,180,15:43:00 2007,237,00:00:00 Problem Description INVALID RESPONSE During this time period, 219A experienced intermittent failures of its [BL]HZ channel differential output. Amplitudes are suspect. END PROBLEM RESOLUTION REPORT DMCQC2008:0051 2008/11/20 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The differential output problem resolved spontaneously on day 237 2007. END **************************************************************************** DATA PROBLEM REPORT DMCQC2008:0052 2008/11/20 IRIS DMC Gillian Sharer DMC 626A TA ?HN 2008,069,00:00:00 2008,324,19:03:00 Problem Description INVALID RESPONSE During this time period 626A ?HN had a problem its differential output. Amplitudes are at 50%. END PROBLEM RESOLUTION REPORT DMCQC2008:0052 2008/11/20 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION On 2008 day 324 19:03, the sensor was replaced. END **************************************************************************** DATA PROBLEM REPORT ASL2006:160 2006/07/03 ASL DCC Valerie Peyton ASL FURI IU 10/*HE 2006,134,07:11:00 2006,275,13:35:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The E component of the FURI CMG3-T has fallen against its stop. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2006:160 2006/10/25 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The broken FURI CMG3-T was replaced with a working STS2. Data quality returns to normal at 2006, 275, 13:35. END **************************************************************************** DATA PROBLEM REPORT DMCQC2008:0050 2008/11/06 IRIS DMC Mary Templeton DMC NV31 IM BHZ 2008,307,12:00:00 2008,309,17:27:00 Problem Description DATA DROPOUTS The mass for the Z channel at NV31 drifted against the stops and recorded no seismic energy during this time span. END PROBLEM RESOLUTION REPORT DMCQC2008:0050 2008/11/06 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION The sensor was recentered on 2008,309. END **************************************************************************** DATA PROBLEM REPORT IDA2010:014 2010/05/28 IDA DCC Erik Klimczak IDA ABKT II *** 2010,090,00:00:00 2010,090,00:00:00 Problem Description OTHER IDA station ABKT has problems with the DAS since day 2010,090-07:00. A faulty circuit board in the DAS is suspected. END PROBLEM RESOLUTION REPORT IDA2010:014 2010/08/20 IDA Erik Klimczak Description of Problem Resolution RESOLUTION The station is back on-line after an IDA engineer visited the station and repaired the DAS. END **************************************************************************** DATA PROBLEM REPORT ASL2006:176 2006/07/20 ASL DCC Valerie Peyton ASL PAB IU */* 2006,200,10:52:00 2006,211,20:22:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. It appears that someone is in the PAB vault for station maintenance. Expect variable data quality and availability. END PROBLEM RESOLUTION REPORT ASL2006:176 2006/08/28 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION PAB station maintenance ended at 2006, 211, 20:22. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT IDA2010:015 2010/05/28 IDA DCC Erik Klimczak IDA AAK II *** 2010,141,00:00:00 2010,145,00:00:00 Problem Description OTHER IDA station AAK was down from day 2010,141 to 2010,145 due to a power outage caused by a storm. Data acquisition was restored after a power line to the station was repaired. END **************************************************************************** DATA PROBLEM REPORT ASL2006:177 2006/07/21 ASL DCC Valerie Peyton ASL PAB IU 00/*HZ 2006,201,15:41:00 2006,204,14:09:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The PAB STS1 Z is dead. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2006:177 2006/07/24 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION It appears that the PAB station operator fixed the problem with the STS1 Z. Data quality returns to normal at 2006, 204, 14:09. END **************************************************************************** DATA PROBLEM REPORT IDA2010:016 2010/05/28 IDA DCC Erik Klimczak IDA PFO II *** 2010,132,00:00:00 2010,132,00:00:00 Problem Description OTHER The North-South channels from the STS-1 seismometer are showing high background noise since the seismometer interface box and cables were changed on day 2010,132. IDA engineers are currently investigating the problem. END PROBLEM RESOLUTION REPORT IDA2010:016 2010/10/22 IDA Erik Klimczak Description of Problem Resolution RESOLUTION Data quality for the North-South channels from the STS-1 seismometer improved as of day 2010,211, after an IDA engineer visited the station and replaced the STS-1N seismometer. END **************************************************************************** DATA PROBLEM REPORT ASL2006:178 2006/07/28 ASL DCC Valerie Peyton ASL KMBO IU */* 2006,208,00:00:00 2006,216,13:04:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. An ASL field team is on-site at KMBO for station maintenance. Expect variable data quality and availability, as well as tests and calibrations. END PROBLEM RESOLUTION REPORT ASL2006:178 2006/08/09 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The ASL field team left KMBO in excellent operational order. Data quality returns to normal at 2006, 216, 13:04. END **************************************************************************** DATA PROBLEM REPORT IDA2010:017 2010/06/30 IDA DCC Erik Klimczak IDA NNA II *** 2010,147,00:00:00 2010,151,00:00:00 Problem Description OTHER IDA station NNA was down from day 2010,147-15:50 to 2010,151-16:56 due to problems with the DAS. Data acquisition was restored after the station operator visited the station and cycled power to the DAS. END **************************************************************************** DATA PROBLEM REPORT ASL2006:179 2006/08/02 ASL DCC Valerie Peyton ASL TSUM IU 00/*HE 2006,191,21:38:00 2006,191,21:38:00 Problem Description NOISE SEED COMMENT REFERENCE C 4509 Channel has elevated low frequency noise levels. The E component of the STS1 at TSUM is exhibiting very high levels of low frequency noise. END **************************************************************************** DATA PROBLEM REPORT IDA2010:010 2010/03/30 IDA DCC Erik Klimczak IDA JTS II BBZ-00 2010,065,00:00:00 2010,065,00:00:00 Problem Description OTHER There are long period pulses on the vertical channels from the STS-1 seismometer since day 2010,065-18:00 for reasons yet to be determined. END **************************************************************************** DATA PROBLEM REPORT ASL2006:172 2006/07/17 ASL DCC Valerie Peyton ASL HKT IU 00/*HE 2006,197,17:36:00 2006,201,16:45:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The E component of the HKT STS1 has fallen against one of its stops. Initially, very large events may be visible. Otherwise, data are not useable. END PROBLEM RESOLUTION REPORT ASL2006:172 2006/07/21 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The HKT station operator recentered the STS1 E component. Data quality returns to normal at 2006, 201, 16:45. END **************************************************************************** DATA PROBLEM REPORT IDA2010:011 2010/03/30 IDA DCC Erik Klimczak IDA NNA II *** 2010,084,00:00:00 2010,088,00:00:00 Problem Description OTHER IDA station NNA was down from day 2010,084-23:51 to 2010,088-00:10 due to problems with the DAS. The station came back on-line after repeated attempts to cycle power to the DAS. END **************************************************************************** DATA PROBLEM REPORT ASL2006:173 2006/07/19 ASL DCC Valerie Peyton ASL HIA IC 00/*HZ 2006,199,07:57:00 2006,202,00:36:00 Problem Description NOISE SEED COMMENT REFERENCE C 4509 Channel has elevated low frequency noise levels. Something happened to the HIA STS1 Z component at 2006, 199, 07:57. After this time, long-period noise levels increase by almost 30dB. END PROBLEM RESOLUTION REPORT ASL2006:173 2006/08/08 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The noise on the HIA STS1 Z component went away of its own accord. Data quality returns to normal at 2006, 202, 00:36. END **************************************************************************** DATA PROBLEM REPORT IDA2010:012 2010/05/28 IDA DCC Erik Klimczak IDA BFO II VSB 2010,059,00:00:00 2010,102,00:00:00 Problem Description DEAD CHANNEL The VSB channel from the Cambridge Invar wire strainmeter was nonfunctional from day 2010,059 to day 2010,102. This channel was restored after the station operator replaced the silica gel for the instrument. END **************************************************************************** DATA PROBLEM REPORT ASL2006:174 2006/07/19 ASL DCC Valerie Peyton ASL MAJO IU */* 2006,188,00:41:00 2006,214,05:20:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 454 Timing MAY be in error, as GPS system is not operating consistently. The MAJO GPS system is currently not receiving the 1 pulse-per-minute time mark string. Timing quality cannot be guaranteed. END PROBLEM RESOLUTION REPORT ASL2006:174 2006/08/03 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The MAJO GPS system began receiving the 1 pulse-per-minute time marks again. Timing quality returns to normal at 2006, 214, 05:20. END **************************************************************************** DATA PROBLEM REPORT IDA2010:013 2010/05/28 IDA DCC Erik Klimczak IDA MSEY II *** 2010,110,00:00:00 2010,111,00:00:00 Problem Description OTHER The station was down from day 2010,110-17:09 to 2010,111-21:24 due to problems with the DAS. Data acquisition was restored after a warm reset of the DAS. END **************************************************************************** DATA PROBLEM REPORT ASL2006:175 2006/07/19 ASL DCC Valerie Peyton ASL FURI IU 10/*HN 2006,171,18:20:00 2006,275,13:35:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The N component of the FURI CMG3-T has fallen against its stop. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2006:175 2006/10/25 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The broken FURI CMG3-T was replaced with a working STS2. Data quality returns to normal at 2006, 275, 13:35. END **************************************************************************** DATA PROBLEM REPORT DMCQC2008:0048 2008/11/03 IRIS DMC Gillian Sharer DMC V13A TA BHE, BHZ 2008,286,18:16:00 2008,287,01:18:00 Problem Description DEAD CHANNEL From day 286 18:16 UTC to day 287 01:18 UTC, V13A BHE/BHZ recorded electronic noise only. END PROBLEM RESOLUTION REPORT DMCQC2008:0048 2008/11/03 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION On day 287 01:18 UTC, V13A BHE and BHZ resumed recording seismic data. END **************************************************************************** DATA PROBLEM REPORT DMCQC2008:0049 2008/11/03 IRIS DMC Gillian Sharer DMC Y27A TA * 2008,287,14:07:00 2008,291,21:47:00 Problem Description DEAD CHANNEL Y27A failed after a mass recenter and lock/unlock attempt on day 287 14:38 UTC, resulting in dead channels. The mass recentering mechanism had failed to respond to remote centering commands since 2008 day 109. END PROBLEM RESOLUTION REPORT DMCQC2008:0049 2008/11/03 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION On 2008 day 291 21:47 UTC, the sensor was replaced. END **************************************************************************** DATA PROBLEM REPORT DMCQC2008:0046 2008/11/03 IRIS DMC Gillian Sharer DMC GRA CI * 2008,276,15:47:00 2008,283,19:14:00 Problem Description DEAD CHANNEL During this time period, GRA recorded noise only and no seismic data. END PROBLEM RESOLUTION REPORT DMCQC2008:0046 2008/11/03 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION On day 283 the DC power system was upgraded, restoring normal station function. END **************************************************************************** DATA PROBLEM REPORT DMCQC2008:0047 2008/11/03 IRIS DMC Gillian Sharer DMC R19A TA * 2008,288,01:08:00 2008,288,15:50:00 Problem Description DEAD CHANNEL The new sensor that was installed at R19A on day 288 01:08 UTC failed to center VM3. During this time VM3 was against the stops and the station recorded noise. END PROBLEM RESOLUTION REPORT DMCQC2008:0047 2008/11/03 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The sensor was replaced on day 288 15:15 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2008:0044 2008/10/03 IRIS DMC Gillian Sharer DMC Y13A TA *HE 2008,236,10:21:00 2008,256,18:28:00 Problem Description INVALID RESPONSE During this time period, Y13A BHE/LHE experienced an apparent differential output failure, causing a sudden jump in DC offset and suspect amplitudes. END PROBLEM RESOLUTION REPORT DMCQC2008:0044 2008/10/03 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION Y13A BHE/LHE spontaneously returned to normal operation. END **************************************************************************** DATA PROBLEM REPORT DMCQC2008:0045 2008/10/07 IRIS DMC Mary Templeton DMC PIN UO BHE 2008,273,11:54:00 2008,277,23:09:00 Problem Description DATA GLITCHES The E component of the CMG-3 at UO.PIN experienced temporary failure, possibly electronic, where it recorded only 2 Hz oscillations and no seismic energy for this time span. The problem did not affect the other two components. END PROBLEM RESOLUTION REPORT DMCQC2008:0045 2008/10/07 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION The problem appears to have gone away on its own. The amplitude spectrum had returned to normal by 2008,277,23:09. END **************************************************************************** DATA PROBLEM REPORT DMCQC2008:0042 2008/10/03 IRIS DMC Gillian Sharer DMC ARV CI * 2008,252,05:53:00 2008,260,18:21:00 Problem Description DATA DROPOUTS Multiple gaps made data unusable from day 252 05:53 - day 254 19:50 UTC, day 255 12:56 - day 256 22:34 UTC, and day 257 14:43 - day 260 18:21 UTC. END PROBLEM RESOLUTION REPORT DMCQC2008:0042 2008/10/03 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION Normal data flow was restored on day 260 at 18:21 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2008:0043 2008/10/03 IRIS DMC Gillian Sharer DMC VES CI BH* 2008,267,19:35:00 2008,270,19:38:00 Problem Description DATA DROPOUTS During this time period, multiple gaps limit data useability. END PROBLEM RESOLUTION REPORT DMCQC2008:0043 2008/10/03 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION Normal data flow was restored on day 270 19:38 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2008:0040 2008/10/03 IRIS DMC Mary Templeton DMC RLMT US ?H? 2008,105,16:38:00 2008,151,17:22:00 Problem Description DEAD CHANNEL RLMT recorded only digitizer noise during these time spans: 2008,105,16:38 to 2008,107,03:40 2008,120,14:40 to 2008,122,04:25 2008,138,01:06 to 2008,151,17:22 END PROBLEM RESOLUTION REPORT DMCQC2008:0040 2008/10/03 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION RLMT was serviced and repaired on 2008,151. END **************************************************************************** DATA PROBLEM REPORT ASL2006:170 2006/07/14 ASL DCC Valerie Peyton ASL SJG IU * 1995,237,15:22:00 1995,241,15:06:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. Station maintenance was performed on SJG during this time. Expect variable data availability and quality. END PROBLEM RESOLUTION REPORT ASL2006:170 2006/07/14 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION SJG station maintenance ended at 1995, 241, 15:06. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT DMCQC2008:0041 2008/10/03 IRIS DMC Mary Templeton DMC WMOK US .HR.?H? 2007,090,02:51:00 2007,104,23:13:00 Problem Description DEAD CHANNEL One or more STS-2HG sensor component(s) at the stops. Sensor not responding to remote recenters. END PROBLEM RESOLUTION REPORT DMCQC2008:0041 2008/10/03 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION The instrument was successfully centered on 2007,104. END **************************************************************************** DATA PROBLEM REPORT ASL2006:171 2006/07/17 ASL DCC Valerie Peyton ASL QSPA IU 20/*H* 2006,197,03:53:00 2006,199,01:50:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. All three components of the QSPA STS2 have fallen against their stops. Initially, very large events may be visible. Otherwise, data are not useable. END PROBLEM RESOLUTION REPORT ASL2006:171 2006/07/18 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION We were able to remotely recenter the QSPA STS2. Data quality returns to normal at 2006, 199, 01:50. END **************************************************************************** DATA PROBLEM REPORT IDA2010:007 2010/01/28 IDA DCC Erik Klimczak IDA EFI II *** 2010,012,00:00:00 2010,012,00:00:00 Problem Description OTHER IDA station EFI is down as of day 2010,012-13:57 due to problems with the Q330 efi00 digitizer. A replacement Q330 digitizer is being prepared to ship to the station. END PROBLEM RESOLUTION REPORT IDA2010:007 2010/03/08 IDA Erik Klimczak Description of Problem Resolution RESOLUTION Data telemetry from IDA station EFI was restored on 2010,035-16:42. Timing remained uncertain until 2010,057-00:29 when the station operator replaced the efi00 Q330 digitizer. END **************************************************************************** DATA PROBLEM REPORT IDA2010:008 2010/01/28 IDA DCC Erik Klimczak IDA EFI II BB*-10 2010,012,00:00:00 2010,012,00:00:00 Problem Description DEAD CHANNEL The BB*-10 channels from the CMG-3T seismometer are nonseismic as of day 2010,012-13:57. The station operator has been requested to cylce power to the CMG-3T seismometer followed by recentering the masses for the sensor. END PROBLEM RESOLUTION REPORT IDA2010:008 2010/03/08 IDA Erik Klimczak Description of Problem Resolution RESOLUTION The BB*-10 channels from the CMG-3T seismometer are seismic as of day 2010,035-16:42 after the station operator cycled power to the sensor, and an IDA engineer recentered the masses for the sensor. END **************************************************************************** DATA PROBLEM REPORT IDA2010:009 2010/03/16 IDA DCC Erik Klimczak IDA HOPE II BB*-00 2010,068,00:00:00 2010,068,00:00:00 Problem Description OTHER All channels from the STS-2 seismometer are showing large intermittent spikes starting day 2010,068-08:10. A faulty sensor is suspected and it will be replaced during the next station visit. END **************************************************************************** DATA PROBLEM REPORT IDA2010:025 2010/08/20 IDA DCC Erik Klimczak IDA KWAJ II *** 2010,203,00:00:00 2010,230,00:00:00 Problem Description OTHER The station was down from day 2010,203-05:45 to 2010,230-23:03 due to problems with the ISP. Data acquisition was restored after the station operator cleared disk errors and rebooted the ISP. END **************************************************************************** DATA PROBLEM REPORT ASL2006:143 2006/05/24 ASL DCC Valerie Peyton ASL CCM IU */* 2006,090,18:30:00 2007,011,20:42:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 449 Timing IS in error, as digitizer timing system operating incorrectly. The IU/CCM digitizer is reporting tick errors. This means that there is a timing difference between individual channels on the digitizer. The GPS clock lock varies from good to bad, but with non-identical timestamps across channels, the timing of the data should be considered incorrect. END PROBLEM RESOLUTION REPORT ASL2006:143 2007/01/12 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The timing problems at CCM were resolved by the station operator. Data quality returns to normal at 2007, 011, 20:42. END **************************************************************************** DATA PROBLEM REPORT IDA2010:026 2010/08/20 IDA DCC Erik Klimczak IDA PALK II BH1-10,LH1-10 2010,211,00:00:00 2010,211,00:00:00 Problem Description OTHER The BB110 channels from the CMG-3T seismometer are non-seismic as of day 2010,211 for reasons yet to be determined. END **************************************************************************** DATA PROBLEM REPORT ASL2006:144 2006/06/07 ASL DCC Valerie Peyton ASL QSPA IU 20/*H* 2006,158,06:42:00 2006,160,01:37:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. All three components of the QSPA STS2 have fallen against their stops. Initially, very large events may be visible. Otherwise, data are not useable. END **************************************************************************** DATA PROBLEM REPORT IDA2010:027 2010/08/20 IDA DCC Erik Klimczak IDA PALK II BH*-00,LH*-00,LN*-00 2010,211,00:00:00 2010,221,00:00:00 Problem Description OTHER All channels from the KS-54000 seismometer and FBA-23 accelerometer were not being acquired from day 2010,218-05:27 to 2010,221-18:04 due to problems with the Q330HR digitizer. Data acquisition for these channels resumed after the station operator replaced the Q330HR digitizer. END **************************************************************************** DATA PROBLEM REPORT ASL2006:145 2006/06/07 ASL DCC Valerie Peyton ASL FUNA IU */* 2006,154,00:00:00 2006,164,14:11:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. An ASL field engineer is on site at FUNA for station maintenance. Expect variable data availability and quality, as well as tests and calibrations. END **************************************************************************** DATA PROBLEM REPORT IDA2010:028 2010/08/20 IDA DCC Erik Klimczak IDA HOPE II *** 2010,216,00:00:00 2010,219,00:00:00 Problem Description OTHER The station was down from day 2010,216-16:49 to 2010,219-12:48 due to problems with the DAS. END **************************************************************************** DATA PROBLEM REPORT ASL2006:146 2006/06/07 ASL DCC Valerie Peyton ASL ANMO IU 10/LDO 2006,109,13:07:00 2006,156,16:23:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The secondary microbarograph at ANMO has failed. Data are not useable. END **************************************************************************** DATA PROBLEM REPORT IDA2010:021 2010/06/30 IDA DCC Erik Klimczak IDA TLY II BB*-00 2010,168,00:00:00 2010,171,00:00:00 Problem Description OTHER Broadband channels were not acquired from day 2010,168-17:27 to 2010,171-02:59 due to a problem with the DAS. Following, the vertical and East-West channels were not acquired from day 2010,173-11:10 to 2010,175-22:39. A failing RT303 board in the DAS is suspected. END **************************************************************************** DATA PROBLEM REPORT IDA2010:022 2010/06/30 IDA DCC Erik Klimczak IDA ASCN II *** 2010,165,00:00:00 2010,181,00:00:00 Problem Description OTHER IDA station ASCN was down from day 2010,165-09:15 to 2010,181-10:14 due to problems with the station computer. Data acquisition was restored after the station computer was rebooted and several processes were re-started. END **************************************************************************** DATA PROBLEM REPORT ASL2006:140 2006/05/17 ASL DCC Valerie Peyton ASL FUNA IU 00/*HZ 2005,030,15:03:00 2005,030,15:03:00 Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE C 4503 Channel has intermittant low frequency noise. The FUNA STS1 Z component has an intermittant long-period noise problem. By 2005, 293, 02:21, the problem has developed into a sine wave with a period that varies from 250 to 370 seconds. The amplitude and duration of the long period noise and the sine wave grow over time. Data quality is severely diminished during these long period noise episodes. END **************************************************************************** DATA PROBLEM REPORT IDA2010:023 2010/06/30 IDA DCC Erik Klimczak IDA SHEL II *** 2010,179,00:00:00 2010,179,00:00:00 Problem Description OTHER IDA station SHEL is down as of day 2010,179, following a scheduled power outage, due to problems with a circuit board in the DAS that is causing excessive gapping across all channels. END PROBLEM RESOLUTION REPORT IDA2010:023 2010/08/20 IDA Erik Klimczak Description of Problem Resolution RESOLUTION The station is back on-line after the station operator pulled the faulty RT303 circuit board from the DAS. Subsequently, there were no East-West channels from the KS-54000 seismometer until the station operator replaced the circuit board with one shipped to the station. END **************************************************************************** DATA PROBLEM REPORT ASL2006:141 2006/05/17 ASL DCC Valerie Peyton ASL SSPA IU ?HE 1995,265,14:00:00 1996,327,22:08:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The SSPA 36000I borehole seismometer E/W component data is bad. This is actually a new instrument, but during the seimometer installation, the E/W module would not "level". As a result, the E/W data streams are dead. END **************************************************************************** DATA PROBLEM REPORT IDA2010:024 2010/08/20 IDA DCC Erik Klimczak IDA KURK II *** 2010,207,00:00:00 2010,207,00:00:00 Problem Description OTHER The station is down as of day 2010,207-09:14 due to damages caused by a thunderstorm. A new GPS clock and XCOMM board for the DAS have been shipped to the station. END **************************************************************************** DATA PROBLEM REPORT ASL2006:142 2006/05/22 ASL DCC Valerie Peyton ASL QSPA IU 20/*H* 2006,140,03:03:00 2006,143,01:58:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. All three components of the QSPA STS2 have fallen against their stops. Initially, very large events may be visible. Otherwise, data are not useable. END **************************************************************************** DATA PROBLEM REPORT IDA2010:020 2010/06/30 IDA DCC Erik Klimczak IDA AAK II *** 2010,164,00:00:00 2010,164,00:00:00 Problem Description OTHER IDA station AAK is down due to a problem with the GPS. A new GPS antenna cable and additional lightning protection has been shipped to the station. END PROBLEM RESOLUTION REPORT IDA2010:020 2010/08/20 IDA Erik Klimczak Description of Problem Resolution RESOLUTION The station is back on-line and the clock is locked and functioning normally as of day 2010,219-09:11 after an IDA engineer visited the station and repaired the GPS antenna and replaced the aak10 DAS. END **************************************************************************** DATA PROBLEM REPORT ASL2006:147 2006/06/12 ASL DCC Valerie Peyton ASL TIXI IU 00/*HN 2006,161,21:03:00 2006,165,07:39:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The N component of the TIXI STS1 has fallen against its stop. Data are not useable. END **************************************************************************** DATA PROBLEM REPORT ASL2006:148 2006/06/12 ASL DCC Valerie Peyton ASL WAKE IU 20/*H* 2006,158,22:51:00 2006,189,07:23:00 Problem Description SPIKES SEED COMMENT REFERENCE C 4525 Channel has spiking and other data glitches. The WAKE STS2 has developed a problem. The masses appear to be slightly destabilized. The problem is charachterized by spiking, movements of the masses, and intermittant pegging of the masses. END PROBLEM RESOLUTION REPORT ASL2006:148 2006/07/12 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The WAKE STS2 problem with spiking and data glitches disappered of its own accord. Data quality returns to normal at 2006, 189, 07:23. END **************************************************************************** DATA PROBLEM REPORT ASL2006:149 2006/06/12 ASL DCC Valerie Peyton ASL SJG IU 00/*HN 2006,156,07:39:00 2006,351,19:18:00 Problem Description NOISE SEED COMMENT REFERENCE C 4410 Channel data quality is poor. The SJG STS1 N component has developed a long-period noise problem. The mass position looks fine. But the response is a couple of dB lower than it should be from 2 to 13 seconds, and about 10dB higher than it should be starting at 100 seconds. The instrument has also started spiking. END PROBLEM RESOLUTION REPORT ASL2006:149 2006/07/13 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The SJG station operator replaced the STS1 N feedback electronics box. This corrected the problem the sensor was having. Data quality returns to normal at 2006, 193, 20:50. SUPPLEMENT The noise problem on the SJG STS1 N was fixed during a field visit. Data quality returns to normal at 2006, 351, 19:18. END **************************************************************************** DATA PROBLEM REPORT DMCQC2008:0039 2008/10/02 IRIS DMC Mary Templeton DMC HLID US ?H? 2006,028,17:03:00 2006,029,22:28:00 Problem Description OTHER Site service visit. Replaced Q680 digiziter with Q330 digitizer. Data show cultural noise, calibrations and outages during this time span. No problem resolution report is needed. END **************************************************************************** DATA PROBLEM REPORT DMCQC2008:0037 2008/09/30 IRIS DMC Mary Templeton DMC ATTU1 IM SHZ 2008,267,17:28:00 2008,273,01:24:00 Problem Description DEAD CHANNEL This short-period instrument recorded only digitizer noise during this time span. END PROBLEM RESOLUTION REPORT DMCQC2008:0037 2008/09/30 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION The instrument appears to have been repaired and calibrated on 2008,273. END **************************************************************************** DATA PROBLEM REPORT DMCQC2008:0038 2008/10/02 IRIS DMC Mary Templeton DMC ATTU IM SHZ 2005,330,20:16:00 2005,332,14:49:00 Problem Description DEAD CHANNEL ATTU.SHZ has zero amplitude during this time span. END PROBLEM RESOLUTION REPORT DMCQC2008:0038 2008/10/02 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION ATTU.SHZ resumed sending nonzero seismic data at 2005,332,14:49. END **************************************************************************** DATA PROBLEM REPORT DMCQC2008:0035 2008/09/19 IRIS DMC Gillian Sharer DMC ARV CI * 2008,239,16:41:00 2008,240,03:06:00 Problem Description DEAD CHANNEL During this time period, CI.ARV did not record seismic data. END PROBLEM RESOLUTION REPORT DMCQC2008:0035 2008/09/19 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION On day 240 03:06 UTC, CI.ARV resumed recording data. END **************************************************************************** DATA PROBLEM REPORT DMCQC2008:0036 2008/09/19 IRIS DMC Gillian Sharer DMC X19A TA *HZ 2008,247,01:12:00 2008,251,15:48:00 Problem Description DEAD CHANNEL Beginning day 247 01:12 UTC, TA.X19A BHZ/LHZ recorded electronic noise and no seismic data. END PROBLEM RESOLUTION REPORT DMCQC2008:0036 2008/09/19 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION On day 251 15:48 UTC, TA.X19A BHZ/LHZ resumed recording data. END **************************************************************************** DATA PROBLEM REPORT DMCQC2008:0033 2008/09/10 IRIS DMC Mary Templeton DMC CNNC US * 2008,250,10:17:00 2008,252,15:25:00 Problem Description OTHER One or more masses drifted until they were at or near the stops. One or more channels did not record true ground velocity during this time span. END PROBLEM RESOLUTION REPORT DMCQC2008:0033 2008/09/10 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION Sensor recovered after receiving a re-centering pulse. END **************************************************************************** DATA PROBLEM REPORT DMCQC2008:0034 2008/09/19 IRIS DMC Gillian Sharer DMC 626A TA * 2008,236,21:50:00 2008,237,18:29:00 Problem Description OTHER Beginning on day 236 21:50 UTC, drifting masses affected the seismic data. On day 237 12:48 UTC, VM1 hit the stops. END PROBLEM RESOLUTION REPORT DMCQC2008:0034 2008/09/19 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION TA.626A resumed recording seismic data on day 237 18:29 UTC following a mass recenter. END **************************************************************************** DATA PROBLEM REPORT DMCQC2008:0031 2008/08/19 IRIS DMC Mary Templeton DMC NV31 IM BHZ 2008,227,10:54:00 2008,231,19:55:00 Problem Description INVALID RESPONSE The Z component mass of this CMG-3T was at or near the stops during this time period and not recording ground velocity reliably. END PROBLEM RESOLUTION REPORT DMCQC2008:0031 2008/08/19 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION The sensor masses were re-centered, calibrated and resumed recording ground motion reliably. END **************************************************************************** DATA PROBLEM REPORT DMCQC2008:0032 2008/09/04 IRIS DMC Mary Templeton DMC TNA AK BHN 2008,240,08:59:00 2008,247,01:40:00 Problem Description INVALID RESPONSE The N channel of this CMG-3T drifted near the stops. Its amplitude spectrum indicates that it did not record true ground velocity during this time span. END PROBLEM RESOLUTION REPORT DMCQC2008:0032 2008/09/04 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION The channel appears to have drifted away from the stops without a re-centering pulse. It\'s amplitude spectrum resembles that of the other channels after this. END **************************************************************************** DATA PROBLEM REPORT DMCQC2008:0030 2008/08/18 IRIS DMC Mary Templeton DMC NATX US *H* 2008,225,11:47:00 2008,228,19:08:00 Problem Description INVALID RESPONSE One or more masses of this STS-2 were near the stops and not recording reliable ground velocity. END PROBLEM RESOLUTION REPORT DMCQC2008:0030 2008/08/18 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION STS-2 was re-centered and resumed recording reliable ground velocity. END **************************************************************************** DATA PROBLEM REPORT IDA2010:018 2010/06/30 IDA DCC Erik Klimczak IDA JTS II *** 2010,147,00:00:00 2010,152,00:00:00 Problem Description OTHER IDA station JTS was down from day 2010,147-22:03 to 2010,152-19:03 due to a power outage caused by a storm. Data acquisition was restored after the station operator visited the station and switched the power inverter back on. END **************************************************************************** DATA PROBLEM REPORT IDA2010:019 2010/06/30 IDA DCC Erik Klimczak IDA BORG II *** 2010,154,00:00:00 2010,160,00:00:00 Problem Description OTHER IDA station BORG was down from day 2010,154-14:29 to 2010,160-14:11 due to problems with the DAS. Data acquisition was restored after the station operator visited the station and cycled power to the DAS. END **************************************************************************** DATA PROBLEM REPORT IDA2010:036 2010/10/22 IDA DCC Erik Klimczak IDA NNA II *** 2010,263,00:00:00 2010,277,00:00:00 Problem Description OTHER IDA station NNA was down from day 2010,263 to 2010,277 due to problems with the DAS. Data acquisition was restored after the station operator cycled power to the DAS several times. END **************************************************************************** DATA PROBLEM REPORT ASL2006:154 2006/06/19 ASL DCC Valerie Peyton ASL MBWA IU */* 2006,010,03:29:00 2006,146,08:52:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 454 Timing MAY be in error, as GPS system is not operating consistently. The GPS timing system at MBWA had a considerable number of intermittant locking problems during this time period. Timing is likely mostly correct, but data should be used with caution. END PROBLEM RESOLUTION REPORT ASL2006:154 2006/06/19 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION All the MBWA GPS timing system problems appear to be resolved by 2006, 146, 08:52. Timing quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT IDA2010:037 2010/10/22 IDA DCC Erik Klimczak IDA RAYN II *** 2010,223,00:00:00 2010,271,00:00:00 Problem Description OTHER IDA station RAYN was down from day 2010,223 to 2010,271 due to failure of the power supply. Data acquisition was restored after the station operator bypassed the UPS. A replacement UPS has been shipped to the station. END **************************************************************************** DATA PROBLEM REPORT ASL2006:155 2006/06/26 ASL DCC Valerie Peyton ASL TIXI IU 00/*HE 2006,167,04:03:00 2006,195,22:26:00 Problem Description SPIKES SEED COMMENT REFERENCE C 4510 Channel has frequent spiking. The TIXI STS1 E instrument has developed a severe spiking problem. Spikes are several million counts in amplitude, and most events are lost in the spikes. END PROBLEM RESOLUTION REPORT ASL2006:155 2006/07/17 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The TIXI STS1 E spiking stopped of its own accord. Data quality returns to normal at 2006, 195, 22:26. END **************************************************************************** DATA PROBLEM REPORT IDA2010:038 2010/10/22 IDA DCC Erik Klimczak IDA ERM II BHN-00,LHN-00,VHN-00 2010,287,00:00:00 2010,287,00:00:00 Problem Description OTHER The North-South channels from the STS-1 seismometer are non-seismic as of day 2010,287-13:59. END PROBLEM RESOLUTION REPORT IDA2010:038 2012/12/07 IDA Erik Klimczak Description of Problem Resolution RESOLUTION The North-South channels from the STS-1 seismometer were restored after IDA engineers replaced the STS-1 seismometer and upgraded the station to a Quanterra Q330HR system. There is still some long period noise possibly due to corrosion on the base plate connectors for the sensor. END **************************************************************************** DATA PROBLEM REPORT ASL2006:156 2006/06/28 ASL DCC Valerie Peyton ASL BILL IU 00/*HZ 2006,178,18:01:00 2006,182,11:55:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The BILL STS1 Z component has fallen against its stop. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2006:156 2006/07/03 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The BILL STS1 Z mass has floated back from its stop sufficiently for proper data recording. Data quality returns to normal at 2006, 182, 11:55. END **************************************************************************** DATA PROBLEM REPORT IDA2010:039 2010/10/22 IDA DCC Erik Klimczak IDA RPN II *** 2010,121,00:00:00 2010,121,00:00:00 Problem Description OTHER There have been ongoing problems with the VSAT telemetry link to RPN since May 2010. The station operator has been requested to adjust the transmission levels several times, which has, at times, temporarily restored the link. However, since the link remains unreliable, a new VSAT modem has been shipped to the station on day 2010,294 (Oct. 21,2010). END **************************************************************************** DATA PROBLEM REPORT ASL2006:157 2006/06/28 ASL DCC Valerie Peyton ASL LVC IU 10/*HN 10/*HE 2006,178,02:08:00 2006,179,16:32:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The horizontal components of the LVC CMG3-T are against their stops. A local earthquake (magnitude 5.5) caused the problem. END PROBLEM RESOLUTION REPORT ASL2006:157 2006/06/28 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION We were able to remotely recenter the LVC CMG3-T. Data quality returns to normal at 2006, 179, 16:32. END **************************************************************************** DATA PROBLEM REPORT IDA2010:032 2010/10/22 IDA DCC Erik Klimczak IDA MSEY II *** 2010,232,00:00:00 2010,232,00:00:00 Problem Description OTHER IDA station MSEY is down due to problems with the ARS and GPS clock. A replacement GPS clock was installed, however there are still problems with the ARS. END PROBLEM RESOLUTION REPORT IDA2010:032 2011/02/04 IDA Erik Klimczak Description of Problem Resolution RESOLUTION Data acquisition at IDA station MSEY was restored on day 2010,302-12:01. END **************************************************************************** DATA PROBLEM REPORT ASL2006:150 2006/06/14 ASL DCC Valerie Peyton ASL RCBR IU 00/*H1 2006,160,01:25:00 2006,160,01:25:00 Problem Description NOISE SEED COMMENT REFERENCE C 4507 Channel has excessively high noise levels. The 1 component of the RCBR 54000 has developed a noise problem. Noise levels are up to 50 dB too high, and response to events appears to be incorrect (it is possible that this apparent response problem is simply caused by the noise problem). This component has also developed a spiking problem. END **************************************************************************** DATA PROBLEM REPORT IDA2010:033 2010/10/22 IDA DCC Erik Klimczak IDA SACV II *** 2010,235,00:00:00 2010,235,00:00:00 Problem Description OTHER IDA station SACV is down as of day 2010,235 due to problems with the DAS. A replacement DAS has been shipped to the station. END PROBLEM RESOLUTION REPORT IDA2010:033 2011/07/22 IDA Erik Klimczak Description of Problem Resolution RESOLUTION The station is back on-line as of day 2011,167-14:47 after an IDA engineer visited the station and performed maintenance on the power system. The station operator reported replacing the DAS on day 2011,061, however, a power problem prevented data acquisition. END **************************************************************************** DATA PROBLEM REPORT ASL2006:151 2006/06/15 ASL DCC Valerie Peyton ASL TIXI IU 00/*HE 2006,165,09:54:00 2006,167,04:03:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The E STS1 component at TIXI has fallen against its stops. Some very large events may be visible. Beyond that, data are not useable. END PROBLEM RESOLUTION REPORT ASL2006:151 2006/06/26 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The TIXI station operator recentered the STS1 E component. Mass position returns to normal at 2006, 167, 04:03. Unfortunately, this instrument developed a severe spiking problem after it was recentered. For more information on the spiking problem, please see ASL2006:155. END **************************************************************************** DATA PROBLEM REPORT IDA2010:034 2010/10/22 IDA DCC Erik Klimczak IDA KURK II *** 2010,207,00:00:00 2010,253,00:00:00 Problem Description OTHER IDA station KURK was down from day 2010,207 to 2010,253 due to damage to the DAS caused by a thunderstorm. After a replacement DAS was installed there was a timing problem. Normal data acquisition resumed after the station operator replaced the GPS clock and XCOM board in the DAS. END **************************************************************************** DATA PROBLEM REPORT ASL2006:152 2006/06/15 ASL DCC Valerie Peyton ASL WAKE IU 20/*H* 2006,164,14:30:00 2006,189,07:23:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4620 Incorrect instrument response for low frequencies only The WAKE STS2 has developed a response problem. Starting at 1Hz and continuing down through all the low frequencies, the instrument response is incorrect. It looks as though the instrument has lost at least half of the double- ended output for the low frequencies. END PROBLEM RESOLUTION REPORT ASL2006:152 2006/07/12 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The WAKE STS2 response problem disappeared on its on. Data quality returns to normal at 2006, 189, 07:23. END **************************************************************************** DATA PROBLEM REPORT IDA2010:035 2010/10/22 IDA DCC Erik Klimczak IDA ABPO II *** 2010,265,00:00:00 2010,272,00:00:00 Problem Description OTHER IDA station ABPO was down from day 2010,265-01:54 to 2010,272-12:21 due to problems with the station computer. Data acquisition was restored after an IDA engineer visited the station and upgraded it to a Q330HR system. END **************************************************************************** DATA PROBLEM REPORT ASL2006:153 2006/06/19 ASL DCC Valerie Peyton ASL ANMO IU 10/*HZ 2006,165,18:35:00 2006,170,19:30:00 Problem Description NOISE SEED COMMENT REFERENCE C 4508 Channel has high levels of high frequency noise. The Z component of the ANMO CMG3-T-B has developed a high frequency noise problem. Starting at 5Hz and continuing up through all the higher frequencies, this component is up to 15 dB noisier than it should be. The response curve in these frequencies also looks incorrect. This is problem simply a result of whatever is causing noise on this component. END PROBLEM RESOLUTION REPORT ASL2006:153 2006/06/19 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION We turned off the ANMO CMG3-T-B, turned it back on, unlocked and recentered it. When the instrument settled down, the high frequency noise problem was gone. Data quality returns to normal at 2006, 170, 19:30. END **************************************************************************** DATA PROBLEM REPORT IDA2010:030 2010/10/22 IDA DCC Erik Klimczak IDA ASCN II *** 2010,238,00:00:00 2010,293,00:00:00 Problem Description OTHER IDA station ASCN was down from day 2010,238-13:49 to 2010,293-11:29 due to problems with the station computer. Data acquisition was restored after the station operator replaced the ISP. END **************************************************************************** DATA PROBLEM REPORT IDA2010:031 2010/10/22 IDA DCC Erik Klimczak IDA DGAR II *** 2010,221,00:00:00 2010,255,00:00:00 Problem Description OTHER IDA station DGAR was down from day 2010,221-04:38 to 2010,255-04:05 due to problems with the station computer. Data acquisition was restored after the station operator replaced the ISP. END **************************************************************************** DATA PROBLEM REPORT ASL2006:158 2006/06/29 ASL DCC Valerie Peyton ASL QSPA IU 20/*H* 2006,179,22:22:00 2006,181,00:29:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. All three components of the QSPA STS2 have fallen against their stops. Initially, very large events may be visible. Otherwise, data are not useable. END PROBLEM RESOLUTION REPORT ASL2006:158 2006/06/29 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION We remotely recentered the QSPA STS2. Data quality returns to normal at 2006, 181, 00:29. END **************************************************************************** DATA PROBLEM REPORT ASL2006:159 2006/06/29 ASL DCC Valerie Peyton ASL SDV IU */* 2006,179,16:35:00 2006,179,22:10:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. The SDV station operator was in the vault for station maintenance. Expect degraded data quality. END PROBLEM RESOLUTION REPORT ASL2006:159 2006/06/29 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The SDV station operator finished his maintenance work at 2006, 179, 22:10. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT DMCQC2008:0028 2008/08/04 IRIS DMC Gillian Sharer DMC TUQ CI BHZ 2008,183,01:19:00 2008,191,21:15:00 Problem Description DEAD CHANNEL From 2008 day 183 01:19 - day 191 21:15 UTC, TUQ BHZ recorded electronic noise only. END PROBLEM RESOLUTION REPORT DMCQC2008:0028 2008/08/04 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION On day 191 21:15 UTC, TUQ resumed normal operation after the sensor was replaced. END **************************************************************************** DATA PROBLEM REPORT DMCQC2008:0029 2008/08/04 IRIS DMC Gillian Sharer DMC T24A TA * 2008,184,16:00:00 2008,192,19:58:00 Problem Description DEAD CHANNEL During this time period, T24A masses were against the stops. The station recorded no seismic data, only noise. END PROBLEM RESOLUTION REPORT DMCQC2008:0029 2008/08/04 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION On day 192 19:58 UTC, the masses were recentered. END **************************************************************************** DATA PROBLEM REPORT DMCQC2008:0026 2008/08/01 IRIS DMC Mary Templeton DMC SRU UU EHZ 2008,211,18:44:00 2008,211,18:49:00 Problem Description OTHER The S-13 sensor and digitizer clipped intermittently during an Mw=5.4 Los Angeles event. END PROBLEM RESOLUTION REPORT DMCQC2008:0026 2008/08/01 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION UU.SRU..EHZ resumed recording with fidelity after this event. END **************************************************************************** DATA PROBLEM REPORT DMCQC2008:0027 2008/08/04 IRIS DMC Gillian Sharer DMC X19A TA BHZ 2008,182,15:44:00 2008,186,21:44:00 Problem Description DEAD CHANNEL From 2008 day 182 15:44 to day 186 21:44 UTC, X19A BHZ recorded no seismic data, only electronic noise. END PROBLEM RESOLUTION REPORT DMCQC2008:0027 2008/08/04 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION On day 186 21:44 UTC, X19A returned to normal operation. END **************************************************************************** DATA PROBLEM REPORT DMCQC2008:0024 2008/07/25 IRIS DMC Gillian Sharer DMC X17A TA * 2008,157,19:55:00 2008,158,20:50:00 Problem Description DEAD CHANNEL From 2008 day 157 19:55 - day 158 20:50 UTC, the sensor at X17A had problems unlocking after cleanup from vault flooding. The station produced noise during this time period. END PROBLEM RESOLUTION REPORT DMCQC2008:0024 2008/07/25 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION On day 158 20:50 UTC, X17A resumed recording seismic data after successful unlock. END **************************************************************************** DATA PROBLEM REPORT DMCQC2008:0025 2008/07/25 IRIS DMC Gillian Sharer DMC S14A TA BHN 2008,180,08:03:00 2008,183,01:13:00 Problem Description DEAD CHANNEL From 2008 day 180 08:03 UTC to day 183 01:13 UTC, the BHN channel of S14A recorded electronic noise. END PROBLEM RESOLUTION REPORT DMCQC2008:0025 2008/07/25 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION On 2008 day 183 01:13 UTC, S14A BHN resumed recording seismic data. END **************************************************************************** DATA PROBLEM REPORT DMCQC2008:0022 2008/07/25 IRIS DMC Gillian Sharer DMC VES CI * 2008,172,15:57:00 2008,199,20:50:00 Problem Description DEAD CHANNEL From 2008 day 172 to day 199, VES recorded no seismic data, only noise. END PROBLEM RESOLUTION REPORT DMCQC2008:0022 2008/07/25 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION VES resumed recording seismic data on day 199 20:50 UTC after a service visit repaired problems with the vault power supply. END **************************************************************************** DATA PROBLEM REPORT DMCQC2008:0023 2008/07/25 IRIS DMC Gillian Sharer DMC DVT CI * 2008,169,20:28:00 2008,176,18:58:00 Problem Description DEAD CHANNEL From 2008 day 169-176, DVT recorded non-seismic noise on all channels. END PROBLEM RESOLUTION REPORT DMCQC2008:0023 2008/07/25 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION On 2008 day 176 18:58 UTC, DVT resumed recording seismic data after the sensor was replaced. END **************************************************************************** DATA PROBLEM REPORT DMCQC2008:0021 2008/05/30 IRIS DMC Gillian Sharer DMC SCZ2 CI ?HN 2008,143,04:00:00 2008,148,19:20:00 Problem Description OTHER VMN neared or hit the stops on day 143. On day 145 ~20:10 UTC, [BL]HN experienced large changes in DC offset. END PROBLEM RESOLUTION REPORT DMCQC2008:0021 2008/05/30 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION On day 148 19:20 UTC, a mass recenter restored normal function. END **************************************************************************** DATA PROBLEM REPORT IDA2010:029 2010/08/20 IDA DCC Erik Klimczak IDA NNA II *** 2010,221,00:00:00 2010,222,00:00:00 Problem Description OTHER IDA station NNA was down from day 2010,221-11:17 to 2010,222-21:08 due to problems with the DAS. Data acquisition was restored after the station operator visited the station and cycled power to the DAS. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:0369 2006/10/27 IRIS DMC Mary Templeton DMC DGMT US HR/*/R 2006,293,13:24:00 2006,297,20:48:00 Problem Description OTHER One or more masses of the STS-2HG at DGMT (HR location code) is pegged. END PROBLEM RESOLUTION REPORT DMCQC2006:0369 2006/10/27 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION This sensor was recentered 2006,297,20:39 END **************************************************************************** DATA PROBLEM REPORT DMCQC2008:0019 2008/05/16 IRIS DMC Gillian Sharer DMC BFS CI * 2008,129,22:05:00 2008,136,18:12:00 Problem Description INCORRECT TIME GPS failed resulting in bad timing. END PROBLEM RESOLUTION REPORT DMCQC2008:0019 2008/05/16 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION Accurate timing was restored on day 136 18:12 UTC with the replacement of the GPS antenna and coax. END **************************************************************************** DATA PROBLEM REPORT DMCQC2008:0017 2008/05/16 IRIS DMC Gillian Sharer DMC 319A TA * 2008,106,03:01:00 2008,106,11:37:00 Problem Description OTHER Very large amplitude electronic noise dominates the _HN channel from day 106 03:01 - 11:37 UTC. Smaller amplitude noise, possibly crosstalk, can be observed on _HE and _HZ channels during this time period. END **************************************************************************** DATA PROBLEM REPORT DMCQC2008:0018 2008/05/16 IRIS DMC Gillian Sharer DMC Q22A TA * 2008,120,00:00:00 2008,130,06:32:00 Problem Description OTHER During this time period, drifting masses affected the seismic data and triggered multiple mass recenters. END PROBLEM RESOLUTION REPORT DMCQC2008:0018 2008/05/16 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The masses stopped drifting after a mass recenter on 2008, 130, 06:32 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2008:0015 2008/04/04 IRIS DMC Gillian Sharer DMC W15A TA * 2008,043,12:00:00 2008,053,06:15:00 Problem Description OTHER During this time period, drifting masses affected the seismic signal. VM3 hit the stops on day 048 16:15 UTC and day 049 17:10 UTC. END PROBLEM RESOLUTION REPORT DMCQC2008:0015 2008/04/04 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION END END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:0360 2006/08/02 IRIS DMC Mary Templeton DMC SRU UU EHZ 2006,206,20:25:00 2006,207,00:36:00 Problem Description DATA DROPOUTS The short-period S-13 channel at SRU failed abruptly. This channel commonly experiences frequent data gaps and glitches. END PROBLEM RESOLUTION REPORT DMCQC2006:0360 2006/08/02 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION UU.SRU.EHZ resumed recording seismic signal. END **************************************************************************** DATA PROBLEM REPORT DMCQC2008:0016 2008/04/04 IRIS DMC Gillian Sharer DMC W20A TA * 2008,046,21:15:00 2008,072,18:20:00 Problem Description OTHER During this time period, drifting masses affected the seismic data. VM2 hit the stops on day 49, 21:20 UTC (mass recenter day 51, 23:16) and on day 60, 04:35 (mass recenter day 60, 06:27). END PROBLEM RESOLUTION REPORT DMCQC2008:0016 2008/04/04 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The masses stopped drifting after a mass recenter on 2008, 073, 18:20 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2008:0013 2008/03/21 IRIS DMC Gillian Sharer DMC R21A TA * 2008,035,14:50:00 2008,064,10:15:00 Problem Description DATA DROPOUTS During this time period, multiple gaps severely limit data usability. END PROBLEM RESOLUTION REPORT DMCQC2008:0013 2008/03/21 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION END END **************************************************************************** DATA PROBLEM REPORT DMCQC2008:0014 2008/04/11 IRIS DMC Gillian Sharer DMC SCZ2 CI * 2007,055,05:50:00 2008,058,04:10:00 Problem Description OTHER During this time period, drifting masses affected the seismic signal. VM1 neared/hit the stops on day 057 ~04:00 UTC. END PROBLEM RESOLUTION REPORT DMCQC2008:0014 2008/04/11 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The problem was resolved with a mass recenter at 2008, 058, 19:45 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2008:0011 2008/03/20 IRIS DMC Gillian Sharer DMC ISA CI * 2008,025,13:30:00 2008,036,23:10:00 Problem Description DEAD CHANNEL ISA recorded digitizer noise for all seismic channels from 2008/01/25 13:30 utc to 2008/01/30 20:55 utc. ISA recorded digitizer noise on its E channel from 2008/01/25 13:30 to 2008/02/05 23:10 utc. The electronic host box for the STS-1 E sensor was shorting the DC power. END PROBLEM RESOLUTION REPORT DMCQC2008:0011 2008/03/20 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The electronic host box was repaired. Normal data flow was restored on 2008/02/05 23:10 utc. END **************************************************************************** DATA PROBLEM REPORT DMCQC2008:0012 2008/03/21 IRIS DMC Gillian Sharer DMC SCZ2 CI ?H? 2008,023,19:15:00 2008,029,20:23:00 Problem Description OTHER During this time period drifting masses affected the seismic data. On 2008, 029, 08:55 utc, VMW hit the stops. END PROBLEM RESOLUTION REPORT DMCQC2008:0012 2008/03/21 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The problem was resolved with a mass recenter at 2008, 029, 20:23 utc. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:0365 2006/10/16 IRIS DMC Mary Templeton DMC CNNC US * 2006,283,13:21:00 2006,285,20:25:00 Problem Description DATA DROPOUTS One or more masses of this STS-2 are near the stops. BHE exhibits acausal spikes and records no seismic energy. END PROBLEM RESOLUTION REPORT DMCQC2006:0365 2006/10/16 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION Mass recentered 2006,285. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:0366 2006/10/18 IRIS DMC Peggy Johnson DMC T06C TA ?H? 2006,278,21:14:00 2006,287,00:15:00 Problem Description DEAD CHANNEL The sensor at T06C appears to have failed on 2006,278 following, or due to, a large amplitude signal at 21:14. Sensor signal after failure has amplitude of only a few counts. END PROBLEM RESOLUTION REPORT DMCQC2006:0366 2006/10/18 IRIS DMC Peggy Johnson Description of Problem Resolution RESOLUTION Sensor was replaced on 2006,286 between 19:00 and 23:00. Settling took about a little over an hour. Signal looks good beginning around 2006, 287, 00:15. END **************************************************************************** DATA PROBLEM REPORT DMCQC2008:0010 2008/10/03 IRIS DMC Mary Templeton DMC WRAK US ..?H? 2008,051,04:53:00 2008,069,09:22:00 Problem Description INVALID RESPONSE Due to a likely sensor problem with the standard gain STS-2SG (null location code), the instrument response in the metadata does not describe instrument behavior during this time span. END PROBLEM RESOLUTION REPORT DMCQC2008:0010 2008/10/03 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION On 2008,069, the station went down. The station was repaired and booted on 2008,232. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:0367 2006/10/18 IRIS DMC Peggy Johnson DMC P06A TA ?HZ 2006,232,07:41:00 2006,286,20:43:00 Problem Description LOW FREQUENCY NOISE The vertical signal at P06A began by getting noisy with a series of tilt-like signals at 07:41. Following that, the signal was noisy, with very long period noise > 20 seconds. END PROBLEM RESOLUTION REPORT DMCQC2006:0367 2006/10/18 IRIS DMC Peggy Johnson Description of Problem Resolution RESOLUTION A calibration signal sent at 2006,286,14:08 (during a teleseism) failed to fix the noisy sensor. The sensor was locked/unlocked a few hours later, at 19:43, which fixed the sensor. After an hour of settling, the signal was better, by about 20:43. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:0368 2006/10/18 IRIS DMC Peggy Johnson DMC P06A TA ?HZ 2006,232,07:41:00 2006,286,20:43:00 Problem Description LOW FREQUENCY NOISE The vertical signal at P06A began by getting noisy with a series of tilt-like signals at 07:41. Following that, the signal was noisy, with very long period noise greater than 20 seconds. END PROBLEM RESOLUTION REPORT DMCQC2006:0368 2006/10/18 IRIS DMC Peggy Johnson Description of Problem Resolution RESOLUTION A calibration signal sent at 2006,286,14:08 (during a teleseism) failed to fix the noisy sensor. The sensor was locked/unlocked a few hours later, at 19:43, which fixed the sensor. After an hour of settling, the signal was better, by about 20:43. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:0361 2006/11/17 IRIS DMC Mary Templeton DMC TX32 IM * 2006,207,21:55:00 2006,279,14:55:00 Problem Description DATA DROPOUTS TX32 stopped sending data following an apparent hardware failure. END PROBLEM RESOLUTION REPORT DMCQC2006:0361 2006/11/17 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION TX32 was repaired and resume sending data 2006,279. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:0362 2006/08/02 IRIS DMC Mary Templeton DMC KSU1 US /?H? 2006,191,15:01:00 2006,206,19:14:00 Problem Description DEAD CHANNEL The Q330SR digitizer at KSU1 recorded digitizer noise until the CMG-3Tb sensor could be installed. END PROBLEM RESOLUTION REPORT DMCQC2006:0362 2006/08/02 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION The CMG-3Tb sensor was connected at 2006,206,19:14. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:0363 2006/09/20 IRIS DMC Mary Templeton DMC KVTX US * 2006,257,13:06:00 2006,262,21:28:00 Problem Description OTHER One or more sensor masses of the STS-2 at KVTX are significantly off center. END PROBLEM RESOLUTION REPORT DMCQC2006:0363 2006/09/20 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION Sensor recentered at 2006,262,21:26:22. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:0364 2006/09/20 IRIS DMC Mary Templeton DMC JFWS US HR/*/* 2006,256,10:37:00 2006,262,21:19:00 Problem Description OTHER All three of the KS54000 masses at JFWS pegged abruptly. The station recorded high-frequency noise with no discernable seismic signal while the masses were pegged. END PROBLEM RESOLUTION REPORT DMCQC2006:0364 2006/09/20 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION The KS54000 at JFWS was recentered at 2006,262,21:14. END **************************************************************************** DATA PROBLEM REPORT DMCQC2008:0008 2008/02/20 IRIS DMC Mary Templeton DMC SRU UU EHZ 2008,050,22:44:00 2008,050,22:47:00 Problem Description OTHER The S-13 sensor and digitizer clipped during an M=3.0 Guadalupe Victoria, Mexico event (near the Baja California-California border). END PROBLEM RESOLUTION REPORT DMCQC2008:0008 2008/02/20 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION UU.SRU..EHZ resumed recording with fidelity after this event. END **************************************************************************** DATA PROBLEM REPORT DMCQC2008:0009 2008/02/25 IRIS DMC Mary Templeton DMC SRU UU EHZ 2008,052,14:17:00 2008,053,23:30:00 Problem Description OTHER The S-13 sensor and digitizer clipped intermittently during an M=6.0 NE Nevada event and subsequent large aftershocks. END PROBLEM RESOLUTION REPORT DMCQC2008:0009 2008/02/25 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION UU.SRU..EHZ resumed recording with fidelity after these larger events. END **************************************************************************** DATA PROBLEM REPORT DMCQC2008:0006 2008/02/07 IRIS DMC Gillian Sharer DMC 119A TA * 2007,337,06:30:00 2008,009,18:30:00 Problem Description OTHER Starting on 12/03/2007 06:30 utc, the vertical mass position stopped responding to recenter commands. On 01/05/2008 at 14:45 utc a further attempt at mass recenter broke the instrument. From then until 01/09/2008 18:30 utc the seismic channels recorded noise only. END PROBLEM RESOLUTION REPORT DMCQC2008:0006 2008/02/07 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The sensor was replaced on 01/09/2008 at 18:30 utc. END **************************************************************************** DATA PROBLEM REPORT DMCQC2008:0007 2008/02/12 IRIS DMC Mary Templeton DMC SRU UU EHZ 2008,042,18:32:00 2008,042,18:36:00 Problem Description OTHER The S-13 sensor and digitizer clipped during an M=5.1 Guadalupe Victoria, Mexico event (near the Baja California-California border). END PROBLEM RESOLUTION REPORT DMCQC2008:0007 2008/02/12 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION UU.SRU..EHZ resumed recording with fidelity after this event. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:0370 2006/11/02 IRIS DMC Mary Templeton DMC ATTU IM * 2003,253,00:00:00 2006,164,18:55:00 Problem Description DATA GLITCHES Occasional high-amplitude spikes on all channels. Typically a few spikes daily. Spikes do not usually appear across all channels at the same time. They are likely related to telemetry. END PROBLEM RESOLUTION REPORT DMCQC2006:0370 2006/11/02 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION Spikes ceased when the ATTU was upgraded to send CD1.1 telemetry packets. END **************************************************************************** DATA PROBLEM REPORT DMCQC2008:0004 2008/02/07 IRIS DMC Gillian Sharer DMC DEC CI * 2008,017,17:47:00 2008,018,15:43:00 Problem Description DEAD CHANNEL From 01/17/2008 17:47 utc to 01/18/2008 15:43 utc all channels recorded noise only. This was caused by unbalanced DC power. END PROBLEM RESOLUTION REPORT DMCQC2008:0004 2008/02/07 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION Battery was replaced on 01/18/2008. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:0371 2006/11/02 IRIS DMC Mary Templeton DMC NV31 IM BHZ 2005,152,00:00:00 2006,301,08:22:00 Problem Description LOW FREQUENCY NOISE The Z component at of the CMG-3T at NV31 is bad. It may have corroded magnet keepers. Records show high noise levels releative to horizontal channels below 10 seconds. This channel has become progressively worse with time. END PROBLEM RESOLUTION REPORT DMCQC2006:0371 2006/11/02 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION The end time represents the pegging of the vertical mass. END **************************************************************************** DATA PROBLEM REPORT DMCQC2008:0005 2008/02/07 IRIS DMC Gillian Sharer DMC SBC CI * 2008,009,23:43:00 2008,016,01:11:00 Problem Description DEAD CHANNEL From 01/09/22008 23:43 to 01/16/2008 01:11 utc, SBC recorded digitizer noise only. END PROBLEM RESOLUTION REPORT DMCQC2008:0005 2008/02/07 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION Data was restored following field service on day 016. END **************************************************************************** DATA PROBLEM REPORT DMCQC2008:0002 2008/01/01 IRIS DMC Mary Templeton DMC SRU UU EHZ 2008,032,06:52:00 2008,032,06:54:00 Problem Description OTHER The S-13 sensor and digitizer clipped during an M=5.2 Utah event. END PROBLEM RESOLUTION REPORT DMCQC2008:0002 2008/01/01 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION UU.SRU..EHZ resumed recording with fidelity after this event. END **************************************************************************** DATA PROBLEM REPORT DMCQC2008:0003 2008/02/07 IRIS DMC Gillian Sharer DMC GLA CI BHZ , LHZ 2008,001,08:09:00 2008,010,21:22:00 Problem Description OTHER The Z component of GLA was near the stops causing extreme DC offset changes in the seismic data. END PROBLEM RESOLUTION REPORT DMCQC2008:0003 2008/02/07 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The STS-1 vertical component was recentered on 01/10/2008 at 21:22 utc. END **************************************************************************** DATA PROBLEM REPORT DMCQC2008:0001 2008/01/03 IRIS DMC Mary Templeton DMC CNNC US ?HN, ?HZ 2007,360,20:25:00 2007,362,00:59:00 Problem Description OTHER The U component of the STS-2 at CNNC began drifting and neared the stops, affecting data on channels E and Z. END PROBLEM RESOLUTION REPORT DMCQC2008:0001 2008/01/03 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION The CNNC STS-2 was recentered at 2007,362,00:57. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:0376 2006/11/15 IRIS DMC Mary Templeton DMC SRU UU EHZ 2006,317,01:37:00 2006,317,01:38:00 Problem Description OTHER S-13 sensor/digitizer clipped during a Mw=6.8 Argentinian event at 2006,317,01:26:45. END PROBLEM RESOLUTION REPORT DMCQC2006:0376 2006/11/15 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION UU.SRU..EHZ resumed recording with fidelity after the event. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:0377 2006/11/16 IRIS DMC Mary Templeton DMC SRU UU EHZ 2006,319,11:25:00 2006,319,11:27:00 Problem Description DATA DROPOUTS S-13 sensor/digitizer clipped during a Mw=8.3 Kuril Island event at 2006,319,11:15:09. END PROBLEM RESOLUTION REPORT DMCQC2006:0377 2006/11/16 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION UU.SRU..EHZ resumed recording with fidelity after the event. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:0378 2006/11/16 IRIS DMC Mary Templeton DMC DUG US ?HE,?HN 2005,043,07:56:00 2005,059,16:51:00 Problem Description LOW FREQUENCY NOISE Approximately once a day, the sensor at DUG responds to a step acceleration consistent with transient SW tilt. The cause of the tilt is unknown, though weights such as a parked vehicle can cause such a signature. The tilt appears as a long period pulse on the E and N channels. END PROBLEM RESOLUTION REPORT DMCQC2006:0378 2006/11/16 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION The cause of SW tilt at DUG appears to have ceased after 2006,059. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:0379 2006/11/16 IRIS DMC Mary Templeton DMC DUG US ?HZ 2004,298,22:24:00 2004,323,09:12:00 Problem Description LOW FREQUENCY NOISE The vertical component of this STS-2 began showing intermittent very long period vertical variations of ~600 counts. These variations show some correlation with system temperature in the digitizer. END PROBLEM RESOLUTION REPORT DMCQC2006:0379 2006/11/16 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION Long period vertical variations subsided 2004,323. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:0372 2006/11/02 IRIS DMC Mary Templeton DMC GOGA US * 2004,027,00:00:00 2006,017,15:24:00 Problem Description LOW FREQUENCY NOISE GOGA shows high levels of diurnal thermal noise, particularly on horizontals channels. END PROBLEM RESOLUTION REPORT DMCQC2006:0372 2006/11/02 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION Diurnal thermal noise ceased when the vault at GOGA was upgraded from an irrigation valve box to a borehole. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:0373 2006/11/02 IRIS DMC Mary Templeton DMC MVCO US * 2006,173,23:49:00 2006,230,19:55:00 Problem Description DATA LOGGER PROBLEM The Q330 is rebooting frequently causing data gaps followed by acausal spikes upon powerup. This is typically caused by system current exceeding a threshold monitored by an internal watchdog. END PROBLEM RESOLUTION REPORT DMCQC2006:0373 2006/11/02 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION Transmission was turned on at 2005,230,19:55 until the problem could be fixed in the field. Transmission resumed without further reboots at 2006,270,06:56. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:0374 2006/11/07 IRIS DMC Mary Templeton DMC NV31 IM BHZ 2006,294,12:24:00 2006,310,07:32:00 Problem Description DEAD CHANNEL The vertical channel at NV31 is pegged. This channel is recording no seismic signal. END PROBLEM RESOLUTION REPORT DMCQC2006:0374 2006/11/07 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION NV31.BHZ appears to have been recentered during a data outage between 2006,310,07:32 and 10:57. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:0375 2006/11/07 IRIS DMC Mary Templeton DMC NV33 IM * 2004,364,08:37:00 2004,364,08:37:00 Problem Description DEAD CHANNEL The KS54000 at NV33 is broken and records no seismic data. END **************************************************************************** DATA PROBLEM REPORT ASL2006:187 2006/08/22 ASL DCC Valerie Peyton ASL LVC IU 10/*HN 10/*HE 2006,237,00:46:00 2006,237,00:46:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The horizontal components of the LVC CMG3-T fell against their stops during a local event (magnitude 6.6). Data are not useable. END PROBLEM RESOLUTION REPORT ASL2006:187 2006/09/13 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The LVC station operator recentered the CMG3-T. N & E data quality return to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2006:188 2006/08/23 ASL DCC Valerie Peyton ASL RAR IU 10/*H* 2006,037,01:47:00 2006,037,01:47:00 Problem Description SPIKES SEED COMMENT REFERENCE C 4510 Channel has frequent spiking. The CMG3-T at RAR has developed a bad spiking problem. Spike amplitudes are 100,000 to 400,000 counts on the N & E components, and only a few 100 counts on the Z component. Since background noise levels are so high at this island site, the spikes are often just barely above the background until one filters the data. Usually, the Z & E component spikes have the same polarity, and the N component spikes have opposite polarity. The spikes are quasi- periodic, with the frequency of occurrance varying from 300 seconds to 800 seconds. At times the spikes disappear for up to a day. It is likely that these spikes are being caused by the air conditioning system in the vault. END **************************************************************************** DATA PROBLEM REPORT ASL2006:189 2006/08/28 ASL DCC Valerie Peyton ASL RAR IU */* 2006,239,23:35:00 2006,239,23:35:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. An ASL field engineer is on site at RAR for station maintenance. Expect variable data quality and availability, as well as tests and calibrations. END PROBLEM RESOLUTION REPORT ASL2006:189 2006/09/06 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The ASL field engineer left RAR in excellent operational order. Data quality returns to normal at 2006, 245, 02:48. END **************************************************************************** DATA PROBLEM REPORT ASL2006:183 2006/08/14 ASL DCC Tyler Storm ASL HKT IU 00/?HE 2006,223,14:35:00 2006,223,14:35:00 Problem Description OTHER SEED COMMENT REFERENCE C 4010 Channel is down. The mass of the E/W instrument is rapidly falling toward the stop. Data are degraded and will most likely be unuseable very soon. END **************************************************************************** DATA PROBLEM REPORT ASL2006:184 2006/08/16 ASL DCC Valerie Peyton ASL PMG IU */* 2006,228,01:23:00 2006,238,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. An ASL field engineer is on site at PMG for station maintenance. Expect variable data quality and availability, as well as tests and calibrations. END PROBLEM RESOLUTION REPORT ASL2006:184 2006/08/28 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The ASL field engineer left PMG in excellent operational order. Data quality returns to normal on 2006, 238. END **************************************************************************** DATA PROBLEM REPORT ASL2006:185 2006/08/16 ASL DCC Valerie Peyton ASL TEIG IU 00/*H* 2006,215,20:30:00 2006,225,21:34:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The TEIG 54000 channels are dead during this time. END PROBLEM RESOLUTION REPORT ASL2006:185 2006/08/16 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Someone vandalized station TEIG, severely damaging the property, the instruments and the data acquisition system. The TEIG station operator was able to repair much of the damage. 54000 data quailty returns to normal at 2006, 225, 21:34. END **************************************************************************** DATA PROBLEM REPORT ASL2006:186 2006/08/18 ASL DCC Valerie Peyton ASL QSPA IU 20/*H* 2006,228,18:59:00 2006,263,20:57:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. All three components of the QSPA STS2 have fallen against their stops. Initially, very large events may be visible. Otherwise, data are not useable. END PROBLEM RESOLUTION REPORT ASL2006:186 2006/09/21 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The QSPA station operator manually releved the STS2. After that, we were able to remotely recenter the instrument. Data quality returns to normal at 2006, 263, 20:57. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:0380 2006/11/16 IRIS DMC Mary Templeton DMC DUG US ?HZ 2005,097,15:05:00 2005,156,00:00:00 Problem Description LOW FREQUENCY NOISE The vertical component of this STS-2 began showing intermittent very long period vertical variations of ~600 counts. These variations show some correlation with system temperature in the digitizer. END PROBLEM RESOLUTION REPORT DMCQC2006:0380 2006/11/16 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION Long period vertical variations subsided 2005,156. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:0381 2006/11/16 IRIS DMC Mary Templeton DMC DUG US ?HZ 2005,280,13:38:00 2006,014,00:00:00 Problem Description LOW FREQUENCY NOISE The vertical component of this STS-2 began showing intermittent very long period vertical variations of ~600 counts. These variations show some correlation with system temperature in the digitizer. END PROBLEM RESOLUTION REPORT DMCQC2006:0381 2006/11/16 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION Long period vertical variations subsided 2006,014. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:0382 2006/11/16 IRIS DMC Mary Templeton DMC TX02 IM SHZ 2006,159,18:01:00 2006,159,19:11:00 Problem Description DEAD CHANNEL TX02 went dead at 2006,159,18:08 and then ceased sending data altogether at 2006,159,19:11. END PROBLEM RESOLUTION REPORT DMCQC2006:0382 2006/11/16 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION TX02 resumed recording seismic data when it was brought back online 2006,173,14:15. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:0387 2006/11/21 IRIS DMC Mary Templeton DMC JCT US ?HE,?HN 2004,156,21:28:00 2004,169,00:49:00 Problem Description LOW FREQUENCY NOISE At intervals of ~2600 to 4500 seconds, the sensor at JCT responds to a step acceleration consistent with transient tilt. The sense of tilt is WSW. The cause of the tilt is unknown, though weights such as a parked vehicle can cause such a signature. The tilt appears as a long period pulse on the E and N channels. END PROBLEM RESOLUTION REPORT DMCQC2006:0387 2006/11/21 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION The cause of the tilt appears to have ceased 2004,169. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:0388 2006/11/21 IRIS DMC Mary Templeton DMC JCT US ?HE,?HN 2004,095,07:32:00 2004,117,19:50:00 Problem Description LOW FREQUENCY NOISE The sensor at JCT began responding to a step accelerations consistent with transient tilt that increased in frequency from once to several times per day. The sense of tilt is NNW. The cause of the tilt is unknown, though weights such as a parked vehicle can cause such a signature. The tilt appears as a long period pulse on the E and N channels. END PROBLEM RESOLUTION REPORT DMCQC2006:0388 2006/11/21 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION Tilting gradually subsided and was no longer visible by 2004,117,19:50. END **************************************************************************** DATA PROBLEM REPORT ASL2006:180 2006/08/07 ASL DCC Valerie Peyton ASL QSPA IU 20/*H* 2006,219,00:03:00 2006,219,21:18:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. All three components of the QSPA STS2 have fallen against their stops. Initially, very large events may be visible. Otherwise, data are not useable. END PROBLEM RESOLUTION REPORT ASL2006:180 2006/08/08 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION We were able to remotely recenter the QSPA STS2. Data quality returns to normal at 2006, 219, 21:18. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:0389 2006/11/22 IRIS DMC Mary Templeton DMC SRU UU EHZ 2006,325,19:38:00 2006,325,19:40:00 Problem Description OTHER S-13 sensor/digitizer clipped during a strong regional event at ~2006,325,19:38. END PROBLEM RESOLUTION REPORT DMCQC2006:0389 2006/11/22 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION UU.SRU..EHZ resumed recording with fidelity after the event. END **************************************************************************** DATA PROBLEM REPORT ASL2006:181 2006/08/07 ASL DCC Valerie Peyton ASL TIXI IU 00/*HE 2006,212,19:12:00 2006,236,03:28:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The E component of the TIXI STS1 is dead. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2006:181 2006/10/25 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The TIXI station operator reset the STS1 E component. Data quality returns to normal at 2006, 236, 03:28. END **************************************************************************** DATA PROBLEM REPORT ASL2006:182 2006/08/14 ASL DCC Tyler Storm ASL TEIG IU 10/?H? 2006,226,00:36:00 2006,245,20:13:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. Data are unuseable. END PROBLEM RESOLUTION REPORT ASL2006:182 2006/09/06 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The problem with the TEIG CMG3-T-B was fixed. Data quality returns to normal at 2006, 245, 20:13. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:0383 2006/11/16 IRIS DMC Mary Templeton DMC WMOK US ?HN 2005,299,19:52:00 2005,335,17:16:00 Problem Description LOW FREQUENCY NOISE The NS channel has oscillatory noise of ~250 seconds in period and approximately 900 counts. Harmonics are also present. END PROBLEM RESOLUTION REPORT DMCQC2006:0383 2006/11/16 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION The long period noise stopped abruptly when the site was visited on 2006,335. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:0384 2006/11/17 IRIS DMC Mary Templeton DMC JCT US * 2005,059,00:00:00 2005,085,00:00:00 Problem Description HIGH FREQUENCY NOISE JCT shows high-frequency noise from 12:00 to 00:00 UTC each weekday. The dominant bandwidth of the noise is 2-6 Hz. END PROBLEM RESOLUTION REPORT DMCQC2006:0384 2006/11/17 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION The noise source appears to have disappeared after 2005,085. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:0385 2006/11/17 IRIS DMC Mary Templeton DMC WUAZ US ?HE,?HN 2004,267,00:00:00 2004,267,00:00:00 Problem Description LOW FREQUENCY NOISE Several times a day, the sensor at WUAZ responds to a step acceleration consistent with transient tilt. The sense of tilt is sometimes SE and other times NE. The cause of the tilt is unknown, though weights such as a parked vehicle can cause such a signature. WUAZ is sited within the Wupatki National Monument. The tilt appears as a long period pulse on the E and N channels. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:0386 2006/11/21 IRIS DMC Mary Templeton DMC WUAZ US ?HE,?HN 2004,267,00:00:00 2004,267,00:00:00 Problem Description LOW FREQUENCY NOISE WUAZ shows noticeable levels of low frequency diurnal thermal noise, particularly on the horizontal channels. END **************************************************************************** DATA PROBLEM REPORT ASL2006:198 2006/10/03 ASL DCC Valerie Peyton ASL MDJ IC */* 2006,234,14:17:00 2006,235,06:00:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 454 Timing MAY be in error, as GPS system is not operating consistently. The MDJ GPS timing system was not operating properly during this time. Timing quality cannot be guaranteed. END PROBLEM RESOLUTION REPORT ASL2006:198 2006/10/03 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The MDJ GPS timing system recovered proper timing at 2006, 235, 06:00. END **************************************************************************** DATA PROBLEM REPORT ASL2006:199 2006/10/05 ASL DCC Valerie Peyton ASL GUMO IU 10/*HE 2006,275,15:10:00 2006,275,20:58:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. A local event caused the E component of the GUMO CMG3-T to peg. Data for this time period are not useable. END PROBLEM RESOLUTION REPORT ASL2006:199 2006/10/05 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The GUMO station operator recentered the CMG3-T. Data quality returns to normal at 2006, 275, 20:58. END **************************************************************************** DATA PROBLEM REPORT ASL2006:194 2006/09/07 ASL DCC Valerie Peyton ASL RCBR IU 00/*H1 2006,247,09:32:00 2006,247,09:32:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The 1 component of the 54000 at RCBR has malfunctioned. It has lost 5dB to 35dB of its double-ended output, and part of the time it is not even recording real data. END **************************************************************************** DATA PROBLEM REPORT ASL2006:195 2006/09/11 ASL DCC Valerie Peyton ASL TEIG IU 10/*H* 2006,252,01:03:00 2006,291,01:52:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. All three components of the TEIG CMG3-T-B have failed. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2006:195 2006/10/20 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The TEIG CMG3-T-B was fixed. Data quality returns to normal at 2006, 291, 01:52. END **************************************************************************** DATA PROBLEM REPORT ASL2006:196 2006/09/13 ASL DCC Valerie Peyton ASL MDJ IC */* 2006,218,01:20:00 2006,223,07:10:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 454 Timing MAY be in error, as GPS system is not operating consistently. The MDJ GPS timing system was not operating properly during this time. Timing quality cannot be guaranteed. END PROBLEM RESOLUTION REPORT ASL2006:196 2006/09/13 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The MDJ GPS timing system recovered proper timing at 2006, 223, 07:10. END **************************************************************************** DATA PROBLEM REPORT ASL2006:197 2006/09/22 ASL DCC Valerie Peyton ASL GUMO IU */* 2006,264,06:37:00 2006,266,15:35:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. An ASL field engineering team is on site at GUMO for station maintenance. Expect variable data quality and availability, as well as calibrations and other tests. END PROBLEM RESOLUTION REPORT ASL2006:197 2006/10/05 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The ASL field team left GUMO in excellent operational order. Data quality returns to normal at 2006, 266, 15:35. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:0390 2008/10/03 IRIS DMC Mary Templeton DMC MIAR US ?HE,?HN 2004,019,00:00:00 2004,019,00:00:00 Problem Description LOW FREQUENCY NOISE MIAR shows noticeable levels of low frequency diurnal thermal noise, particularly on the horizontal channels. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:0391 2006/11/22 IRIS DMC Mary Templeton DMC TX31 IM * 2004,071,16:37:00 2004,299,23:02:00 Problem Description HIGH FREQUENCY NOISE TX31 and the rest of the TXAR array shows high-frequency noise between 12:00 to 00:00 UTC most weekdays during this time span. The dominant bandwidth of the noise is 1-10 Hz. END PROBLEM RESOLUTION REPORT DMCQC2006:0391 2006/11/22 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION The noise source appears to have disappeared after 2004,300. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:0392 2006/11/28 IRIS DMC Mary Templeton DMC TX31 IM * 2005,249,12:00:00 2005,316,00:00:00 Problem Description HIGH FREQUENCY NOISE TX31 and the rest of the TXAR array shows high-frequency noise between 12:00 to 00:00 UTC most weekdays during this time span. The dominant bandwidth of the noise is 1-10 Hz. END PROBLEM RESOLUTION REPORT DMCQC2006:0392 2006/11/28 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION The noise source appears to have disappeared after 2005,316. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:0393 2006/11/29 IRIS DMC Mary Templeton DMC CNNC US ?H? 2006,329,11:25:00 2006,332,22:01:00 Problem Description OTHER The U component of the STS-2 at CNNC began drifting and neared the stops, affecting data on all three channels. END PROBLEM RESOLUTION REPORT DMCQC2006:0393 2006/11/29 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION Thc CNNC STS-2 was recentered at 2006,332,02:05:57. END **************************************************************************** DATA PROBLEM REPORT ASL2006:190 2006/08/28 ASL DCC Valerie Peyton ASL PAB IU */* 2006,237,00:04:00 2006,237,00:04:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. It appears that someone is in the PAB vault for station maintenance. Expect variable data quality and availability. END PROBLEM RESOLUTION REPORT ASL2006:190 2006/10/16 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Station maintenance at PAB appears to have ended at 2006, 238, 12:52. END **************************************************************************** DATA PROBLEM REPORT ASL2006:191 2006/08/28 ASL DCC Valerie Peyton ASL PAB IU 00/*H* 2006,238,12:30:00 2006,238,12:52:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. All three components of the STS1 instruments at PAB are producing digitizer noise. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2006:191 2006/10/16 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Station maintenance at PAB appears to have ended at 2006, 238, 12:52. END **************************************************************************** DATA PROBLEM REPORT ASL2006:192 2006/08/29 ASL DCC Valerie Peyton ASL HRV IU *HZ 2006,240,13:56:00 2006,241,16:07:00 Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE C 4509 Channel has elevated low frequency noise levels. The HRV STS1 Z component is displaying an unusual amount of low frequency noise. The station operator has been asked to investigate. END PROBLEM RESOLUTION REPORT ASL2006:192 2006/09/08 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The noise on the HRV STS1 component disappeared on its own. Data quality returns to normal at 2006, 241, 16:07. END **************************************************************************** DATA PROBLEM REPORT ASL2006:193 2006/09/06 ASL DCC Valerie Peyton ASL SDV IU */* 2006,241,21:30:00 2006,298,15:41:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 452 Timing IS in error, as clock is unlocked. The GPS system at SDV is reporting a clock quality of 0. The system is apparently unable to lock onto the GPS signal. It also has lost the 1ppm clock string from the GPS satellites. Timing quality is presumed bad. END PROBLEM RESOLUTION REPORT ASL2006:193 2006/10/30 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The GPS system at SDV resumed reception of the GPS clock string at 2006, 298, 15:41. Timing quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:0394 2007/01/19 IRIS DMC Mary Templeton DMC NV31 IM * 2006,298,02:34:00 2007,018,00:16:00 Problem Description DATA DROPOUTS NV31 only receives data during 3 each day that correspond to noise bursts at coincident station NV11. Received data contains frequent gaps. END PROBLEM RESOLUTION REPORT DMCQC2006:0394 2007/01/19 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION Station recorded normally after digitizer and GPS were replaced and the station recabled. END **************************************************************************** DATA PROBLEM REPORT ASL2002:107 2002/11/18 ASL DCC Valerie Peyton ASL BILL IU 00/*HE 2002,321,18:37:00 2002,325,05:55:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The E component of the STS1 at BILL has fallen against one of its stops. Data are not usable during this time. END PROBLEM RESOLUTION REPORT ASL2002:107 2002/11/21 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The BILL station operator recentered the E component of the STS1. Data quality returns to normal at 2002, 325, 05:55. END **************************************************************************** DATA PROBLEM REPORT ASL2002:108 2002/11/20 ASL DCC Valerie Peyton ASL ANMO IU */* 2002,323,15:12:00 2002,326,19:35:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. The ANMO station is being moved back to its original location during this time. Data quality is compromised as instruments are removed from their current locations and re-installed in their original locations. END PROBLEM RESOLUTION REPORT ASL2002:108 2003/03/12 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The complete re-installation of ANMO at the original site was finished at 2002, 326, 19:35. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2002:109 2002/11/21 ASL DCC Valerie Peyton ASL SPA IU 20/*H2 2002,322,19:00:00 2002,326,05:34:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4625 Invalid instrument response. The 2 component (nominal E) of the KS54000 at SPA now has a corrupt response. Beginning at 2002, 322, 19:00, the response gradually degrades. Beginning at 2002, 323, 21:17, the component becommes horribly noisy, and the response is completely corrupt. We are investigating the problem. END PROBLEM RESOLUTION REPORT ASL2002:109 2002/11/25 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The 2 component of the KS54000 at SPA is once more producing data with the correct response. We did nothing to the instrument, but somehow the problem went away on its own. Data quality returns to normal at 2002, 326, 05:34. END **************************************************************************** DATA PROBLEM REPORT ASL2002:103 2002/11/13 ASL DCC Valerie Peyton ASL DWPF IU */* 2002,312,13:30:00 2002,318,16:50:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 451 Timing MAY be in error, as clock is unlocked. The GPS clock at DWPF is not locking on to the GPS timing standard. Timing is potentially unreliable. We are looking into the cause of the problem. END PROBLEM RESOLUTION REPORT ASL2002:103 2002/11/20 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The GPS clock at DWPF locked back onto the GPS timing standard at 2002, 318, 16:50. Timing quality has returned to normal. END **************************************************************************** DATA PROBLEM REPORT ASL2002:104 2002/11/13 ASL DCC Valerie Peyton ASL XAN IC 10/*H* 2002,271,11:54:00 2002,317,02:35:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The STS2 at XAN is producing digitizer noise. It looks like someone has unplugged the seismometer. Data are unuseable. END PROBLEM RESOLUTION REPORT ASL2002:104 2002/12/26 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION The instrument started working again 2002,317,02:35:00. END **************************************************************************** DATA PROBLEM REPORT ASL2002:105 2002/11/15 ASL DCC Valerie Peyton ASL CASY IU 00/*H* 2002,051,09:30:00 2002,062,09:10:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The CASY STS1 Z mass has fallen against one of its stops. Data are unuseable. END PROBLEM RESOLUTION REPORT ASL2002:105 2002/11/15 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The CASY STS1 Z mass has begun moving away from the stop. Data are once more useable as of 2002, 062, 09:10. Since the mass position appears to have been corrected by environmental changes, it is likely that at some point the mass will fall against the opposite stop. Until then, data quality is good. END **************************************************************************** DATA PROBLEM REPORT ASL2002:106 2002/11/18 ASL DCC Valerie Peyton ASL KBS IU 00/*HZ 2002,321,14:04:00 2002,324,10:46:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The Z component of the STS1 at KBS has lost mass capture. Data are not useable during this time. END PROBLEM RESOLUTION REPORT ASL2002:106 2002/11/21 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The KBS station operator recentered the Z component of the STS1. Data quality returns to normal at 2002, 324, 10:46. END **************************************************************************** DATA PROBLEM REPORT ASL2002:100 2002/11/07 ASL DCC Valerie Peyton ASL MA2 IU */* 2002,292,05:00:00 2002,317,13:48:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 451 Timing MAY be in error, as clock is unlocked. The MA2 clock is not locked on to the GPS timing standard. We are trying to diagnose the cause of the problem. Timing accuracy cannot be guaranteed during this time period. END PROBLEM RESOLUTION REPORT ASL2002:100 2002/11/13 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The MA2 station operator managed to fix the GPS clock problem. We're not sure how he did it, but are we ever grateful! Timing quality returns to normal at 2002, 317, 13:48. END **************************************************************************** DATA PROBLEM REPORT ASL2002:101 2002/11/08 ASL DCC Valerie Peyton ASL OTAV IU 00/*HE 2002,312,16:49:00 2003,014,22:15:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The E component of the STS1 at OTAV is dead. We are not sure what the problem is, but we are investigating. END PROBLEM RESOLUTION REPORT ASL2002:101 2002/11/18 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Currently, there is no resolution SUPPLEMENT An ASL field engineer was able to repair the E component of the STS1 at OTAV during a site maintenance visit. Data quality returns to normal at 2003, 014 22:15. END **************************************************************************** DATA PROBLEM REPORT ASL2002:102 2002/11/12 ASL DCC Valerie Peyton ASL HKT IU 00/*HN 2002,315,17:21:00 2002,320,07:28:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The N component of the STS1 at HKT is recording digitizer noise. The problem started during an attempt to relevel the seismometer. The station operator is working on fixing the problem. END PROBLEM RESOLUTION REPORT ASL2002:102 2002/11/18 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The HKT station operator has fixed the STS1 N component. The problem was a broken bell jar. Data quality returns to normal at 2002, 320, 07:28. END **************************************************************************** DATA PROBLEM REPORT ASL2002:118 2002/12/11 ASL DCC Tyler Storm ASL HKT IU 00/?HN 2002,315,17:21:45 2002,320,07:30:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. Channels from the STS-1 N/S are dead. END PROBLEM RESOLUTION REPORT ASL2002:118 2002/12/11 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION Back to normal at 2002,320,07:30. END **************************************************************************** DATA PROBLEM REPORT IDA1993:2 1993/03/29 IDA DCC Holly Given IDA PFO II ??E 1993,041,00:00:00 1993,078,18:00:00 Problem Description LOW FREQUENCY NOISE Beginning approximately 1993:041 data streams derived from the EW STS-1 have noise levels approximately 10x (time domain amplitude) the NS channels for frequencies below about .05 Hz. The problem was found to be caused by the top piece of the protective housing touching the bell jar over the seismometer. The proctective housing had been changed when the seismometers were switched from glass baseplates on sand to aluminum baseplates on micrometer legs following several episodes of vault flooding. No action or resolution report is required; the piece was replaced and EW noise levels have returned to normal. END **************************************************************************** DATA PROBLEM REPORT ASL2002:119 2002/12/12 ASL DCC Valerie Peyton ASL TIXI IU 00/*HZ 2002,344,21:01:00 2002,347,03:15:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The Z component of the STS1 at TIXI has fallen against one of the stops. Data quality has been compromised. Some events are being recorded properly, other events are being recorded fine. END PROBLEM RESOLUTION REPORT ASL2002:119 2002/12/13 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Despite an intense blizzard and a vault buried in snow, the TIXI station operator was able to recenter the STS1 Z. Data quality returns to normal at 2002, 347, 03:15. END **************************************************************************** DATA PROBLEM REPORT IDA1993:5 1993/05/24 IDA DCC Holly Given IDA PFO II VHZ 1993,091,00:00:00 1993,142,00:00:00 Problem Description LOW FREQUENCY NOISE We discovered that the STS-1 vertical had lost vacuum sometime around 93:091, although the exact start date of this problem is uncertain. Low-frequency noise levels increased by at least a factor of 40 in the time domain such that the Earth tides, usually apparent at PFO, are masked. Vacuum was restored on 93:142 and thus no resolution report is required. END **************************************************************************** DATA PROBLEM REPORT ASL2002:114 2002/11/27 ASL DCC Valerie Peyton ASL ANMO IU */* 2002,331,16:15:00.2002 2002,331,16:15:00.2002 Problem Description OTHER SEED COMMENT REFERENCE S 110 TEST DATA: Calibration, and testing in progress. Calibrations are being run on the ANMO seismometers at this time. The KS54000 calibrations will be found in the first half of the time window on this report; CMG3-T-B calibrations will be found in the second half of the time window. END PROBLEM RESOLUTION REPORT ASL2002:114 2002/12/04 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Because of grounding problems with the Guralp, the first attempt at calibrating it failed, and the entire calibration process took several days. The KS54000 calibrations can be found in the first 20 hours of this time window, and the CMG3-T-B calibrations can be found in the last 20 hours of this time window. END **************************************************************************** DATA PROBLEM REPORT ASL2002:115 2002/12/04 ASL DCC Valerie Peyton ASL BILL IU 00/*HZ 2002,337,18:36:00 2002,342,08:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The Z component of the STS1 at BILL has fallen against one of the stops. Data are unuseable. END PROBLEM RESOLUTION REPORT ASL2002:115 2002/12/19 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The BILL station operator recentered the STS1 Z component at 2002, 342, 08:00. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2002:116 2002/12/04 ASL DCC Valerie Peyton ASL KONO IU */* 2002,336,14:27:00 2002,338,18:10:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 451 Timing MAY be in error, as clock is unlocked. The GPS clock at KONO is unlocked from the GPS timing standard. The clock is drifting at a rate of approximately -0.1 seconds per day. Timing of the data is currently unreliable. END PROBLEM RESOLUTION REPORT ASL2002:116 2003/08/20 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The GPS clock at KONO began locking on to the GPS timing standard at 2002, 338, 18:10. Timing quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2002:117 2002/12/05 ASL DCC Tyler Storm ASL PAYG IU * 2002,338,22:02:00 2003,011,00:27:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. All channels are dead. END PROBLEM RESOLUTION REPORT ASL2002:117 2003/01/30 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION A satellite engineer was able to kick-start the PAYG system while on site for a satellite maintenance trip. Data quality to normal at 2003, 011, 00:27. END **************************************************************************** DATA PROBLEM REPORT ASL2002:110 2002/11/21 ASL DCC Valerie Peyton ASL OTAV IU 10/* 2002,312,00:00:00 2003,286,19:28:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The CMG3-T at OTAV is dead. All three channels are producing digitizer noise. The operator is trying to solve the problem. END PROBLEM RESOLUTION REPORT ASL2002:110 2003/10/14 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The OTAV station operator fixed whatever problem the CMG3-T having. Data quality returns to normal at 2003, 286, 19:28. END **************************************************************************** DATA PROBLEM REPORT ASL2002:111 2002/11/21 ASL DCC Valerie Peyton ASL DWPF IU */* 2002,325,10:00:00 2002,327,16:40:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. An ASL field engineer is at DWPF performing station maintenance. Data quality may vary; calibrations and other tests may be run. END PROBLEM RESOLUTION REPORT ASL2002:111 2002/12/17 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Our field engineer left DWPF in fine working condition at 2002, 327, 16:40. Data quality returns to normal at this time. Good calibrations were run from 2002, 326, 20:09 to 2002, 327, 06:42. END **************************************************************************** DATA PROBLEM REPORT ASL2002:113 2002/11/25 ASL DCC Valerie Peyton ASL KBS IU 00/*HZ 2002,326,04:05:00 2003,022,15:02:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The Z component of the STS1 at KBS has lost mass capture. Data are not useable during this time. END PROBLEM RESOLUTION REPORT ASL2002:113 2003/01/24 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION An ASL field engineer was able to repair the STS1 Z component at KBS during a station maintenance visit. Data quality returns to normal at 2003, 022, 15:02. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:009 2006/02/26 IRIS DMC Mary Templton DMC PD02 IM SH? 2005,359,02:06:00 2006,005,20:12:00 Problem Description OTHER There are 1054 gaps and 1781 overlaps in the data during this time span. END PROBLEM RESOLUTION REPORT DMCQC2006:009 2006/02/26 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION Gaps and overlaps ceased 2006,005,20:12. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:008 2006/01/26 IRIS DMC Mary Templton DMC PD01 IM SH? 2005,359,02:06:00 2006,005,20:12:00 Problem Description OTHER There are 1054 gaps and 1781 overlaps in the data during this time span. END PROBLEM RESOLUTION REPORT DMCQC2006:008 2006/01/26 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION Gaps and overlaps ceased 2006,005,20:12. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:007 2006/01/26 IRIS DMC Mary Templton DMC PD31 IM BH? 2005,359,02:06:00 2006,005,20:12:00 Problem Description OTHER There are 1054 gaps and 1781 overlaps in the data during this time span. END PROBLEM RESOLUTION REPORT DMCQC2006:007 2006/01/26 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION Gaps and overlaps ceased 2006,,005,20:12. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:006 2006/01/26 IRIS DMC Mary Templton DMC MIAR US ??? 2006,023,23:55:00 2006,025,17:55:00 Problem Description OTHER Data outage of unknown cause in raw/realtime data with quality flag R. END PROBLEM RESOLUTION REPORT DMCQC2006:006 2006/01/26 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION MIAR R data resumed 2006,025,17:55. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:005 2006/10/24 IRIS DMC Mary Templeton DMC LONY US * 2005,364,08:58:00 2006,010,23:11:00 Problem Description DATA DROPOUTS An interruption in data delivery for raw/real-time data occurred when the station code was changed from LOZ to LONY. Data prior to the station code change has been updated as LONY. The gap in the raw data having quality flag R should be filled by data with quality flag Q when the NEIC submits quality-controlled data for this time period. END PROBLEM RESOLUTION REPORT DMCQC2006:005 2006/10/24 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION Quality controlled data from the NEIC has been archived for this time period. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:004 2006/01/26 IRIS DMC Mary Templton DMC ATTU IM ??? 2006,007,02:23:00 2006,007,02:49:00 Problem Description OTHER The broadband and short period sensors were swamped during this Mw=5.5 Aleutians event beneath the station and its first aftershock. During the strongest arrivals, the broadband KS54000 (BH?) channels show many segments of zero amplitude interspersed with high amplitude values. The short period (SHZ) instrument is clipped. END PROBLEM RESOLUTION REPORT DMCQC2006:004 2006/01/26 IRIS DMC Mary Templeton Description of Problem Resolution NONE ATTU records with fidelity in the absence of large nearby events. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:003 2006/01/24 IRIS DMC Mary Templeton DMC GOGA US ??? 2006,017,15:23:00 2006,104,16:01:00 Problem Description OTHER Station removed during GSN upgrade. Borehole drilling is taking place at the site. END PROBLEM RESOLUTION REPORT DMCQC2006:003 2006/05/04 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION GOGA started sending data containing digitizer noise on 2006,104. Borehole must be redrilled before sensors can be attached to the digitizers. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:002 2006/01/24 IRIS DMC Mary Templton DMC NV31 IM BHZ 2006,020,10:18:00 2006,020,10:18:00 Problem Description DEAD CHANNEL The Z component at NV31 pegged and is recording no seismic signal. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:001 2006/01/24 IRIS DMC Mary Templton DMC NV31 IM BH? 2006,016,23:06:00 2006,018,18:22:06 Problem Description OTHER Data outage. END PROBLEM RESOLUTION REPORT DMCQC2006:001 2006/01/23 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION NV31 data resumed 2006,018,18:22:06. END **************************************************************************** DATA PROBLEM REPORT ASL2002:125 2002/12/26 ASL DCC Tyler Storm ASL XAN IC 10/?HZ 2002,317,02:35:00 2002,358,03:32:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4625 Invalid instrument response. Amplitudes are 30db too small. END PROBLEM RESOLUTION REPORT ASL2002:125 2003/02/21 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The XAN station operator reset the STS2 at 2002, 358, 03:32. Data quality returns normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2002:126 2002/12/30 ASL DCC Tyler Storm ASL AFI IU 00/*HN 2002,321,04:20:00 2003,015,21:19:00 Problem Description OTHER SEED COMMENT REFERENCE C 4010 Channel is down. Data from the N/S STS-1 are unuseable; instrument mass is pegged. END PROBLEM RESOLUTION REPORT ASL2002:126 2003/03/13 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION Instrument was reset 2003,015,21:19:00. END **************************************************************************** DATA PROBLEM REPORT ASL2002:121 2002/12/13 ASL DCC Valerie Peyton ASL SPA IU 20/*H2 2002,326,05:38:00 2002,326,05:38:00 Problem Description OTHER SEED COMMENT REFERENCE C 4410 Channel data quality is poor. The 2 component of the KS54000 at SPA is so far off center that data quality and response are completely unstable. Sometimes both are excellent, sometimes both are ridiculously bad. We will soon have field engineers on site and they will attempt to center the mass. END PROBLEM RESOLUTION REPORT ASL2002:121 2002/12/13 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Our field engineers were successful in recentering the 2 component of the KS54000 at SPA. Data quality returns to normal at 2002, 346, 22:26. END **************************************************************************** DATA PROBLEM REPORT ASL2002:122 2002/12/13 ASL DCC Valerie Peyton ASL MSKU IU 00/*HZ 2002,338,16:45:00 2002,352,14:23:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The Z component of the STS1 at MSKU is inoperational. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2002:122 2003/03/13 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The Z component of the STS1 at MSKU returned to normal operation at 2002, 352, 14:23. Data quality also returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2002:123 2002/12/13 ASL DCC Valerie Peyton ASL MSKU IU 10/*HN 2002,338,16:45:00 2003,172,10:15:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The N component of the CMG3-T at MSKU is inoperational. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2002:123 2003/06/23 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION ASL field engineers were able to repair the N channel of the CMG3-T during a station maintenance visit to MSKU. Data quality returns to normal at 2003, 172, 10:15. END **************************************************************************** DATA PROBLEM REPORT ASL2002:124 2002/12/16 ASL DCC Valerie Peyton ASL WCI IU */* 2002,347,19:46:00 2003,032,15:45:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. All channels at WCI are currently recording digitizer noise. We are looking into the source of the problem. END PROBLEM RESOLUTION REPORT ASL2002:124 2003/02/03 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The WCI station operator fixed a problem with the seismometer power supplies. Data quality returns to normal at 2003, 032, 15:45. END **************************************************************************** DATA PROBLEM REPORT ASL2002:120 2002/12/13 ASL DCC Valerie Peyton ASL KBS IU 00/*HE 2002,345,13:46:00 2003,021,11:37:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The STS1 E component at KBS is producing raw digitizer noise. Data are unusable. END PROBLEM RESOLUTION REPORT ASL2002:120 2003/01/24 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION An ASL field engineer was able to repair the STS1 E component at KBS during a station maintenance visit. Data quality returns to normal at 2003, 021, 11:37. END **************************************************************************** DATA PROBLEM REPORT DMCQC2008:0060 2008/12/23 IRIS DMC Mary Templeton DMC PKME US * 2008,355,04:07:00 2008,357,16:38:00 Problem Description DEAD CHANNEL One or more sensor masses began drifting and came to rest against the stops. The E channel no longer recorded seismic energy during this time span. END PROBLEM RESOLUTION REPORT DMCQC2008:0060 2008/12/23 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION The STS-2 at PKME was recentered on 2008,357. END **************************************************************************** DATA PROBLEM REPORT ASL2009:003 2009/02/06 ASL DCC Cory Gilberton ASL LVC IU 00/?H? 2009,036,22:24:00 2008,323,16:07:00 Problem Description CHANNEL ORIENTATION SEED COMMENT REFERENCE C 4625 Invalid instrument response. After a lot of trouble-shooting to get the station back up and running, there was a mix-up on one of the cable connections at the station. The result is that the components are not being displayed correctly, and there are incorrect sensitivity values as well. END **************************************************************************** DATA PROBLEM REPORT ASL2009:004 2009/05/04 ASL DCC Cory Gilberton ASL INCN IU 00/?HN 2000,159,22:12:00 2008,323,16:07:00 Problem Description OTHER SEED COMMENT REFERENCE C 4420 Channel data quality is fair. There has been some low frequency noise on the STS1 N/S component since 2000,159,22:12 that is a result of new equipment installed on the pier. END **************************************************************************** DATA PROBLEM REPORT ASL2009:001 2009/01/07 ASL DCC Tyler Stormton ASL MACI IU * 2008,214,00:00:00 2008,323,16:07:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE C 4110 Channel has small data gap. Data are very "gappy". The com link does not seem to be fast enough for the 100 and 20sps continuous data streams. END **************************************************************************** DATA PROBLEM REPORT ASL2009:002 2009/01/20 ASL DCC Cory Gilberton ASL MAJO IU 00/BHZ 2009,017,08:28:00 2008,323,16:07:00 Problem Description HIGH FREQUENCY NOISE SEED COMMENT REFERENCE S 1510 Data quality is fair. High frequency noise begins on the STS1 vertical on 2009,17. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:019 2006/02/26 IRIS DMC Mary Templton DMC PD12 IM SH? 2005,359,02:06:00 2006,005,20:12:00 Problem Description OTHER There are 1054 gaps and 1781 overlaps in the data during this time span. END PROBLEM RESOLUTION REPORT DMCQC2006:019 2006/02/26 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION Gaps and overlaps ceased 2006,005,20:12. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:018 2006/02/26 IRIS DMC Mary Templton DMC PD11 IM SH? 2005,359,02:06:00 2006,005,20:12:00 Problem Description OTHER There are 1054 gaps and 1781 overlaps in the data during this time span. END PROBLEM RESOLUTION REPORT DMCQC2006:018 2006/02/26 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION Gaps and overlaps ceased 2006,005,20:12. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:017 2006/02/26 IRIS DMC Mary Templton DMC PD10 IM SH? 2005,359,02:06:00 2006,005,20:12:00 Problem Description OTHER There are 1054 gaps and 1781 overlaps in the data during this time span. END PROBLEM RESOLUTION REPORT DMCQC2006:017 2006/02/26 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION Gaps and overlaps ceased 2006,005,20:12. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:016 2006/02/26 IRIS DMC Mary Templton DMC PD09 IM SH? 2005,359,02:06:00 2006,005,20:12:00 Problem Description OTHER There are 1054 gaps and 1781 overlaps in the data during this time span. END PROBLEM RESOLUTION REPORT DMCQC2006:016 2006/02/26 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION Gaps and overlaps ceased 2006,005,20:12. END **************************************************************************** DATA PROBLEM REPORT UW1998:002 1998/09/15 UW Ken Creager DMC FURI IU BHZ 1997,263,00:00:00 1997,365,00:00:00 Problem Description INCORRECT TIME 12 P wave picks from this station during September-December 1997 are consistently late by about 3 s with very little scatter. END PROBLEM RESOLUTION REPORT UW1998:002 2000/03/10 ASL DCC Valerie Peyton Description of Problem Resolution COMMENT Unfortunately, the manner in which we check for timing problems at a station does not allow us sufficient resolution to determine a consistent 3 second problem. However, the clock logs for this time period for station FURI indicate that the clock was working fine and locking consistently. If an internal system clock loses its GPS lock for too long, it may drift. When the clock locks back on to the GPS signal, it is possible for the time to be off, but only in one minute increments. From the problem description, and from looking at the data, the clock does not appear to be drifting, nor otherwise obviously malfunctioning. Unless we can obtain more detailed information on the problem, no further action will be taken. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:015 2006/02/26 IRIS DMC Mary Templton DMC PD08 IM SH? 2005,359,02:06:00 2006,005,20:12:00 Problem Description OTHER There are 1054 gaps and 1781 overlaps in the data during this time span. END PROBLEM RESOLUTION REPORT DMCQC2006:015 2006/02/26 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION Gaps and overlaps ceased 2006,005,20:12. END **************************************************************************** DATA PROBLEM REPORT UW1998:001 1998/05/19 University of Washington Ken Creager SPYDER CPUP GT BHZ,LHZ,VHZ 1998,126,09:30:00 1998,126,09:30:00 Problem Description Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. Horizontals channels are OK, but verticals are dead. See SPYDER plots for CPUP for 1998/05/10 06:05:58 event. END PROBLEM RESOLUTION REPORT UW1998:001 2000/03/10 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The vertical component of the KS54000 recorded only digitizer noise from 1998, 126,09:30 to 1998,148,21:12. We don't know the cause of the problem, but the operator was able to fix it. The data are now good. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:014 2006/02/26 IRIS DMC Mary Templton DMC PD07 IM SH? 2005,359,02:06:00 2006,005,20:12:00 Problem Description OTHER There are 1054 gaps and 1781 overlaps in the data during this time span. END PROBLEM RESOLUTION REPORT DMCQC2006:014 2006/02/26 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION Gaps and overlaps ceased 2006,005,20:12. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:013 2006/02/26 IRIS DMC Mary Templton DMC PD06 IM SH? 2005,359,02:06:00 2006,005,20:12:00 Problem Description OTHER There are 1054 gaps and 1781 overlaps in the data during this time span. END PROBLEM RESOLUTION REPORT DMCQC2006:013 2006/02/26 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION Gaps and overlaps ceased 2006,005,20:12. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:012 2006/02/26 IRIS DMC Mary Templton DMC PD05 IM SH? 2005,359,02:06:00 2006,005,20:12:00 Problem Description OTHER There are 1054 gaps and 1781 overlaps in the data during this time span. END PROBLEM RESOLUTION REPORT DMCQC2006:012 2006/02/26 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION Gaps and overlaps ceased 2006,005,20:12. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:011 2006/02/26 IRIS DMC Mary Templton DMC PD04 IM SH? 2005,359,02:06:00 2006,005,20:12:00 Problem Description OTHER There are 1054 gaps and 1781 overlaps in the data during this time span. END PROBLEM RESOLUTION REPORT DMCQC2006:011 2006/02/26 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION Gaps and overlaps ceased 2006,005,20:12. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:010 2006/02/26 IRIS DMC Mary Templton DMC PD03 IM SH? 2005,359,02:06:00 2006,005,20:12:00 Problem Description OTHER There are 1054 gaps and 1781 overlaps in the data during this time span. END PROBLEM RESOLUTION REPORT DMCQC2006:010 2006/02/26 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION Gaps and overlaps ceased 2006,005,20:12. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:024 2006/02/26 IRIS DMC Mary Templeton DMC TX02 IM SH? 2005,359,01:38:00 2006,005,20:45:00 Problem Description OTHER There are 1402 gaps in the data during this time span. END PROBLEM RESOLUTION REPORT DMCQC2006:024 2006/02/26 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION Gaps and overlaps ceased 2006,005,20:45. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:023 2006/02/26 IRIS DMC Mary Templeton DMC TX01 IM SH? 2005,359,01:38:00 2006,005,20:45:00 Problem Description OTHER There are 1402 gaps in the data during this time span. END PROBLEM RESOLUTION REPORT DMCQC2006:023 2006/02/26 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION Gaps and overlaps ceased 2006,005,20:45. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:022 2006/02/26 IRIS DMC Mary Templeton DMC TX31 IM BH? 2005,359,01:38:00 2006,005,20:45:00 Problem Description OTHER There are 1402 gaps in the data during this time span. END PROBLEM RESOLUTION REPORT DMCQC2006:022 2006/02/26 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION Gaps and overlaps ceased 2006,005,20:45. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:021 2006/02/26 IRIS DMC Mary Templeton DMC PD32 IM SH? 2005,359,02:06:00 2006,005,20:12:00 Problem Description OTHER There are 1054 gaps and 1781 overlaps in the data during this time span. END PROBLEM RESOLUTION REPORT DMCQC2006:021 2006/02/26 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION Gaps and overlaps ceased 2006,005,20:12. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:020 2006/02/26 IRIS DMC Mary Templton DMC PD13 IM SH? 2005,359,02:06:00 2006,005,20:12:00 Problem Description OTHER There are 1054 gaps and 1781 overlaps in the data during this time span. END PROBLEM RESOLUTION REPORT DMCQC2006:020 2006/02/26 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION Gaps and overlaps ceased 2006,005,20:12. END **************************************************************************** DATA PROBLEM REPORT DMC1995:002 1995/09/20 IRIS DMC Rick Benson DMC ANMO IU BH[U,V,W] 1995,231,00:00:00 1995,231,00:00:00 Problem Description INCORRECT SAMPLE RATE The dataless seed (DATALESS.ASL.950909 at the DMC) has the sample rate as 40Hz, but the fixed section of the data records are representing it as 20 Hz. I think a correction to the dataless seed is in order. END PROBLEM RESOLUTION REPORT DMC1995:002 1995/09/21 ASL Tyler Storm Description of Problem Resolution Resolution The sample rate has been corrected. The new dataless SEED volume is in ASL's anonymous ftp area (pub/responses/DATALESS.ASL20.seed). END **************************************************************************** DATA PROBLEM REPORT DMC1995:003 1995/09/20 IRIS DMC Rick Benson DMC HKT IU ? 1995,211,00:00:00 1995,211,00:00:00 Problem Description OTHER INCORRECT DATA RECORD REPRESENTATION Data records for HKT have the word order represented as 1234. In looking at each data record, the first data record for a day has the data format as " VAX/8086", and the rest have "68000/SPARC word order". I used a couple of data records as an example: 1995,211,00:00:00.7530 and 1995,211,00:27:42.7530 start times. END PROBLEM RESOLUTION REPORT DMC1995:003 1995/09/21 ASL Tyler Storm Description of Problem Resolution Resolution The format error has been corrected. The new dataless SEED volume is in ASL's anonymous ftp area (pub/responses/DATALESS.ASL20.seed). END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:059 2006/02/01 IRIS DMC Mary Templeton DMC NV08 IM SH? 2006,005,10:05:00 2006,005,20:38:00 Problem Description DATA DROPOUTS There are 158 gaps in each channel during this time span. No problem resolution report is needed. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:054 2006/02/01 IRIS DMC Mary Templeton DMC NV02 IM SH? 2006,005,10:05:00 2006,005,20:38:00 Problem Description DATA DROPOUTS There are 158 gaps in each channel during this time span. No problem resolution report is needed. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:053 2006/02/01 IRIS DMC Mary Templeton DMC NV01 IM SH? 2006,005,10:05:00 2006,005,20:38:00 Problem Description DATA DROPOUTS There are 158 gaps in each channel during this time span. No problem resolution report is needed. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:052 2006/01/31 IRIS DMC Peg Johnson DMC M05C TA * 2006,026,00:00:00 2006,026,00:00:00 Problem Description SITE VISIT: Visitors: Bob Pierce Ken Oliver STATION SERVICE LOG DATE: 26 Jan 2006. STATION/SENSOR DOWN TIME (UTC): None SERVICE DESCRIPTION: Install Pump Actions taken; Removed about 4 inches of water from vault. There was no water in the battery box. Not able to tell how the water enter the vault. CHANGES AFFECT INSTRUMENT RESPONSE: No. END PROBLEM RESOLUTION REPORT DMCQC2006:052 2006/01/31 IRIS DMC Peg Johnson Description of Problem Resolution RESOLUTION Site visit completed. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:067 2006/02/01 IRIS DMC Mary Templeton DMC BLA US ?H? 2006,025,15:46:00 2006,026,00:28:00 Problem Description OTHER Site service visit. Replaced Q680 digiziter and STS-2 high gain sensor with Q330 digitizer and STS-2 standard gain sensor. Data show cultural noise and outages during this time span. No problem resolution report is needed. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:060 2006/02/01 IRIS DMC Mary Templeton DMC NV09 IM SH? 2006,005,10:05:00 2006,005,20:38:00 Problem Description DATA DROPOUTS There are 158 gaps in each channel during this time span. END PROBLEM RESOLUTION REPORT DMCQC2006:060 2006/02/01 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION Gaps ceased at 2006,005,20:38. END **************************************************************************** DATA PROBLEM REPORT ASL2006:200 2006/10/05 ASL DCC Valerie Peyton ASL GUMO IU */* 2006,267,07:02:00 2006,276,04:52:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 452 Timing IS in error, as clock is unlocked. The GPS system at GUMO is not receiving timemarks from the GPS satellite system. Timing quality should be considered bad. END PROBLEM RESOLUTION REPORT ASL2006:200 2006/10/17 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The GUMO timing problem was resolved. Timing quality returns to normal at 2006, 276, 04:52. END **************************************************************************** DATA PROBLEM REPORT ASL2006:201 2006/10/10 ASL DCC Valerie Peyton ASL LVC IU 10/*HE 2006,280,08:21:00 2006,283,20:35:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The E component of the CMG3-T at LVC has fallen against one of its stops. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2006:201 2006/10/10 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION We remotely recentered the LVC CMG3-T. Data quality returns to normal at 2006, 283, 20:35. END **************************************************************************** DATA PROBLEM REPORT ASL2006:206 2006/10/25 ASL DCC Valerie Peyton ASL TIXI IU 00/*HZ 2006,140,09:41:00 2006,319,05:22:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4620 Incorrect instrument response for low frequencies only The Z component of the TIXI STS1 has developed a spiking problem. Spikes are primarily in the positive direction. By 2006, 170, spiking is nearly continuous, event recording quality is severely compromised, and the instrument response is affected. The problem is in the feedback electronics for the instrument. END PROBLEM RESOLUTION REPORT ASL2006:206 2006/11/28 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The TIXI station operator replaced the defective STS1 Z feedback electronics box with an operational one. The new feedback electronics box solved the response and spiking problems. Data quality returns to normal at 2006, 319, 05:22. END **************************************************************************** DATA PROBLEM REPORT ASL2006:207 2006/10/25 ASL DCC Valerie Peyton ASL MSKU IU 00/*H* 2006,270,00:00:00 2006,270,00:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. All three components of the STS1 at MSKU are producing digitizer noise. The corrosive environment has destroyed the feedback electronics boxes. The sensor themselves still appear to be in good condition, but we will not be able to replace the feedback electronics boxes until we determine how to protect them from the vault environment. END **************************************************************************** DATA PROBLEM REPORT ASL2006:208 2006/10/25 ASL DCC Valerie Peyton ASL FURI IU */* 2006,218,00:00:00 2006,227,23:13:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. An ASL field engineering team was on site at FURI for station maintenance during this time. Expect variable data availability and quality, as well as tests and calibrations. END PROBLEM RESOLUTION REPORT ASL2006:208 2006/10/25 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The ASL field team left FURI at 2006, 227, 23:13. END **************************************************************************** DATA PROBLEM REPORT ASL2006:209 2006/10/25 ASL DCC Valerie Peyton ASL FURI IU 00/*H* 2006,199,21:08:00 2006,223,17:01:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. All three STS1 components at FURI are recording digitizer noise. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2006:209 2006/10/25 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The problem with the FURI STS1 component was solved by an ASL field team during a maintenance trip. Data quality returns to normal at 2006, 223, 17:01. END **************************************************************************** DATA PROBLEM REPORT ASL2006:202 2006/10/13 ASL DCC Valerie Peyton ASL TEIG IU 00/*H1 2006,285,12:38:00 2006,285,12:38:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The 1 component of the TEIG 54000 is not operating properly. END **************************************************************************** DATA PROBLEM REPORT ASL2006:203 2006/10/16 ASL DCC Valerie Peyton ASL PAB IU 00/*HE 2006,268,09:22:00 2006,303,11:46:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The E STS1 component at PAB is producing digitizer noise. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2006:203 2006/10/30 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The PAB STS1 E was fixed. Data quality returns to normal at 2006, 303, 11:46. END **************************************************************************** DATA PROBLEM REPORT ASL2006:205 2006/10/25 ASL DCC Valerie Peyton ASL SFJD IU 10/* 2006,298,16:06:00 2006,335,14:56:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. All three of the SFJD STS2 channels are recording digitizer noise. Data are not useable. This is a continuation of the problem reported for these same channels in ASL2006:204 END PROBLEM RESOLUTION REPORT ASL2006:205 2006/12/04 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The SFJD station operator installed a new STS2 host box. This solved the problem with the instrument. Data quality returns to normal at 2006, 335, 14:56. END **************************************************************************** DATA PROBLEM REPORT ASL2006:210 2006/10/25 ASL DCC Valerie Peyton ASL FURI IU 10/*HZ 2006,199,21:08:00 2006,275,13:35:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The Z component of the CMG3-T at FURI is producing digitizer noise. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2006:210 2006/10/25 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The broken FURI CMG3-T was replaced with a working STS2. Data quality returns to normal at 2006, 275, 13:35. END **************************************************************************** DATA PROBLEM REPORT ASL2006:211 2006/10/25 ASL DCC Valerie Peyton ASL QSPA IU 20/*H* 2006,278,15:58:00 2006,279,17:09:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. All three components of the QSPA STS2 have fallen against their stops. Initially, very large events may be visible. Otherwise, data are not useable. END PROBLEM RESOLUTION REPORT ASL2006:211 2006/10/25 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION We were able to remotely recenter the QSPA STS2. Data quality returns to normal at 2006, 279, 17:09. END **************************************************************************** DATA PROBLEM REPORT ASL2006:212 2006/10/26 ASL DCC Valerie Peyton ASL RSSD IU 00/*HZ 2006,279,00:30:00 2006,279,00:30:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4630 Response may be invalid. The Z component of the RSSD 54000 has an intermittant response problem during this time period. Noise levels are up to 40dB too high, and response to events is incorrect. Instrument response appears to recover completely between the problematic episodes, but the rest of the time data should be used with great caution. END **************************************************************************** DATA PROBLEM REPORT HRV1993:100 1993/12/19 Harvard WQC Misha Salganik ASL PFO TS LHN LHE 1993,190,15:37:00 1993,190,15:37:00 Problem Description LOW FREQUENCY NOISE Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1993:100 1994/04/10 ASL Tyler Storm Description of Problem Resolution COMMENT This is the normal background noise level for PFO at that time of the day. END **************************************************************************** DATA PROBLEM REPORT HRV1993:101 1993/12/19 Harvard WQC Misha Salganik ASL QIZ CD LHN 1993,190,15:37:00 1993,190,15:00:00 Problem Description Problem Description LOW FREQUENCY NOISE Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1993:101 1994/08/16 ASL Tyler Storm Description of Problem Resolution Comment The long-period noise at QIZ (LHN) occurs intermittently. The normal noise level is about 2000 counts (p to p), but when the long-period noise is present the value jumps to around 4000 counts. I do not know what is causing this noise. If I find out anything significant, I'll file a supplemental report. END **************************************************************************** DATA PROBLEM REPORT HRV1993:102 1993/12/19 Harvard WQC Misha Salganik ASL SBC TS BHE BHN LHN LHE 1993,190,15:37:00 1993,209,18:00:00 Problem Description Problem Description LOW FREQUENCY NOISE Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1993:102 1994/04/10 ASL Tyler Storm Description of Problem Resolution Comment This is the normal background noise level for SBC at that time of the day. END **************************************************************************** DATA PROBLEM REPORT IDA2008:041 2008/07/24 IDA DCC Erik Klimczak IDA NIL II BH*-00,LH*-00,VH*-00 2008,010,00:00:00 2008,010,00:00:00 Problem Description DEAD CHANNEL The vertical and horizontal channels from the KS-54000 seismometer are non-seismic due to a faultly seismometer. END PROBLEM RESOLUTION REPORT IDA2008:041 2012/04/11 IDA Erik Klimczak Description of Problem Resolution RESOLUTION The vertical and horizontal channels from the KS-54000 seismometer were restored after IDA engineers upgraded the station and replaced the KS-54000 seismometer. END **************************************************************************** DATA PROBLEM REPORT HRV1993:103 1993/12/19 Harvard WQC Misha Salganik ASL SNZO IU LHZ LHN 1993,207,11:53:00 1993,208,11:00:00 Problem Description Problem Description OTHER Dead channels. Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1993:103 1994/01/04 ASL Tyler Storm Description of Problem Resolution Resolution The vertical and north/south data streams at SNZO were inoperative from day 207, 01:30 through day 209, 02:15; the reason for the outage is unknown. END **************************************************************************** DATA PROBLEM REPORT ASL2006:217 2006/11/02 ASL DCC Valerie Peyton ASL QSPA IU 20/*H* 2006,305,16:31:00 2006,307,18:30:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. All three components of the QSPA STS2 have fallen against their stops. At first, large events may be visible. Beyond that, data are not useable. END PROBLEM RESOLUTION REPORT ASL2006:217 2006/11/06 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The QSPA STS2 was recentered. Data quality returns to normal at 2006, 307, 18:30. END **************************************************************************** DATA PROBLEM REPORT HRV1993:104 1993/12/19 Harvard WQC Misha Salganik ASL TAU II LHZ LHN LHE 1993,190,15:37:00 1993,190,15:00:00 Problem Description Problem Description LOW FREQUENCY NOISE Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1993:104 1994/08/09 ASL Tyler Storm Description of Problem Resolution Comment We do not know what is causing the low-frequency noise at TAU. Looking back through the data, I saw intermittent time periods where the noise level increased, but I could not correlate them with anything. If we find an explanation, I will file a supplemental report. END **************************************************************************** DATA PROBLEM REPORT ASL2006:218 2006/11/07 ASL DCC Valerie Peyton ASL KIP IU */* 2006,306,07:08:00 2006,355,20:33:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 451 Timing MAY be in error, as clock is unlocked. The GPS timing system at KIP has lost the 1 ppm timestring from the GPS satellite system. Timing should be considered inaccurate. END PROBLEM RESOLUTION REPORT ASL2006:218 2007/01/08 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The KIP station operator replaced the old GPS timing system with a new one. Timing quality returns to normal at 2006, 355, 20:33. END **************************************************************************** DATA PROBLEM REPORT HRV1993:105 1993/12/19 Harvard WQC Misha Salganik ASL TBT IU BHN LHN 1993,209,18:07:00 1993,209,18:00:00 Problem Description Problem Description LOW FREQUENCY NOISE Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1993:105 1994/01/05 ASL Tyler Storm Description of Problem Resolution Comment We do not know what is causing the pulses depicted in HRV1993:105_ps. More recently I have noticed the same thing occurring on the vertical channels. So far I have only seen this anomaly in data from instruments contained in belljars with a vacuum applied to them. It is possible that the belljars could be slowly leaking. I will file a supplemental report if we find the answer. END **************************************************************************** DATA PROBLEM REPORT ASL2006:219 2006/11/08 ASL DCC Valerie Peyton ASL KIEV IU 00/*H* 2006,312,10:17:00 2006,312,22:58:00 Problem Description OTHER SEED COMMENT REFERENCE C 1840 Calibration data Calibrations were run on the KIEV STS1 seismometers during this time. END PROBLEM RESOLUTION REPORT ASL2006:219 2006/11/08 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The KIEV STS1 calibrations ended at 2006, 312, 22:58. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT HRV1993:106 1993/12/19 Harvard WQC Misha Salganik ASL TUC IU BHE BHN LHE LHN 1993,205,20:24:00 1993,205,20:00:00 Problem Description Problem Description LOW FREQUENCY NOISE Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1993:106 1994/01/12 ASL Tyler Storm Description of Problem Resolution Resolution Due to cultural noise, the data from TUC has a much higher horizontal n oise level during a twelve hour time frame starting at approximately 14:00 UTC, an d running through 02:00 UTC the following day. This pattern will most likely con tinue. END **************************************************************************** DATA PROBLEM REPORT HRV1993:107 1993/12/19 Harvard WQC Misha Salganik ASL WMQ CD BHZ BHN BHE 1993,187,02:53:00 1993,187,02:00:00 Problem Description Problem Description HIGH FREQUENCY NOISE END PROBLEM RESOLUTION REPORT HRV1993:107 1994/04/13 ASL Tyler Storm Description of Problem Resolution Resolution I usually associate an equipment problem with the term "data glitch". The noise depicted in HRV1993:107 (WMQ) appears to be ground motion; most likely a wind gust, or something along that line. Due to it's high-frequency, the noise is not seen on the long-period channels. END **************************************************************************** DATA PROBLEM REPORT ASL2006:213 2006/10/26 ASL DCC Valerie Peyton ASL SDV IU 10/*H* 2006,264,15:39:00 2006,268,14:05:00 Problem Description NOISE SEED COMMENT REFERENCE C 4410 Channel data quality is poor. During this time period, the CMG3-T at SDV appears swamped by a high- frequency noise signal. At first glance the instrument looks broken, but further analysis leaves the impression that something was being done at the Santo Domingo dam to cause this noise. Data are severely compromised. END PROBLEM RESOLUTION REPORT ASL2006:213 2006/10/26 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The noise problem on the CMG3-T at SDV ended at 2006, 268, 14:05. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT HRV1993:108 1993/12/19 Harvard WQC Misha Salganik ASL YSS IU LHN 1993,190,15:37:00 1993,190,01:00:00 Problem Description Problem Description HIGH FREQUENCY NOISE Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1993:108 1994/01/07 ASL Tyler Storm Description of Problem Resolution Comment I don't know what caused the noise in this situation. The distu rbance (when viewed unfiltered) looks similar to data from a surface se ismometer experiencing pressure or termperature changes. I will file a supplemental report if we discover the source. END **************************************************************************** DATA PROBLEM REPORT ASL2006:214 2006/10/26 ASL DCC Valerie Peyton ASL PMG IU 00/*HN 2006,274,11:00:00 2006,274,14:22:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The N component of the STS1 at PMG experienced an odd excursion during this time. Unfortunately, this destroyed the data from the coda of a magnitude 6.6 earthquake. END PROBLEM RESOLUTION REPORT ASL2006:214 2006/10/26 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The strange excursion on the PMG STS1 N component ended at 2006, 274, 14:22. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2006:215 2006/10/30 ASL DCC Valerie Peyton ASL TATO IU 10/*HZ 10/*HE 2006,301,07:37:00 2006,303,16:45:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The Z and E components of the STS2 at TATO have fallen against their stops. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2006:215 2006/10/30 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION We remotely recentered the TATO STS2. Data quality returns to normal at 2006, 303, 16:45. END **************************************************************************** DATA PROBLEM REPORT ASL2006:216 2006/10/31 ASL DCC Valerie Peyton ASL PAYG IU */* 2006,230,19:25:00 2006,321,20:06:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 454 Timing MAY be in error, as GPS system is not operating consistently. The PAYG GPS timing system is not working properly, and timing quality should be considered suspect. At 2006, 230, 19:25, the PAYG system lost the GPS time mark string. At that point, clock drift increased to 0.9 seconds in two days, and the system began reporting periodic time jumps. At 2006, 264, 18:57, the system reported a tick error of 1327 ticks difference between channels. END PROBLEM RESOLUTION REPORT ASL2006:216 2007/01/10 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The PAYG timing problems have been fixed. Timing quality returns to normal at 2006, 321, 20:06. END **************************************************************************** DATA PROBLEM REPORT IDA1995:001 1995/01/10 IDA DCC Peter Davis IDA PFO II BHE,BLE,VHE 1994,186,00:00:00 1994,186,00:00:00 Problem Description OTHER The performance of the EW STS-1 at PFO has gradually degraded since fire swept through the Observatory on the above date. The problem was believed to originate with the buffer box, which was replaced on 1994228. However, during a three day period beginning around day 1994250, VHE noise increased to a level 20x greater than on VHN. The problem is now thought to center on the STS-1 sensor itself, and steps are being taken to isolate and correct the problem. END PROBLEM RESOLUTION REPORT IDA1995:001 1995/02/14 IDA Peter Davis Description of Problem Resolution Resolution The EW STS-1 at PFO was replaced on 1995019. The quality of the data from the EW seismic channels has returned to normal. END **************************************************************************** DATA PROBLEM REPORT IDA1995:002 1995/01/26 IDA DCC Peter Davis IDA WRAB II *** 1994,317,09:49:00 1995,010,00:00:00 Problem Description INCORRECT TIME During this period, acquisition of the external time signal was lost due to the failure of one of the optical modems following a lightning strike at the vault end of the link. The internal clock continued to run, and the time has been corrected for most of the field volumes by extrapolating the current clock drift backwards. If this assumption is correct, the timing uncertainty is on the order of 1-2 seconds. Plots of major seismic arrivals support this conclusion. END **************************************************************************** DATA PROBLEM REPORT IDA1995:003 1995/02/14 IDA DCC Peter Davis IDA PFO II B*N,VHN 1994,357,00:00:00 1995,033,00:00:00 Problem Description OTHER A degredation of data quality on all NS data channels was traced to the STS-1 seismometer. The instrument was replaced on 1995033. END **************************************************************************** DATA PROBLEM REPORT IDA1995:004 1995/03/01 IDA DCC Peter Davis IDA TAU II *** 1995,056,05:03:00 1995,056,05:03:00 Problem Description OTHER Fire destroyed the power cables leading to the vault and data acquisition system on this date. It is estimated that the repair will required another week to ten days to complete during which time the station will be inoperable. The cable connecting the station to the Sun computer which services NRTS data was also destroyed, but that will require more time to replace. We will advise when data are again being recorded. END PROBLEM RESOLUTION REPORT IDA1995:004 1996/01/26 IDA Peter Davis Description of Problem Resolution Resolution The cable uplink between data logger and Sun workstation has been replaced with a microwave link. Installation was completed as of January 23, 1996. NRTS data are again available as of that date. END **************************************************************************** DATA PROBLEM REPORT IDA1995:005 1995/03/07 IDA DCC Peter Davis IDA WRAB II *** 1995,059,18:37:00 1995,059,18:37:00 Problem Description OTHER The Sun workstation which handles NRTS data (and therefore SPYDER requests) for WRAB failed on 1995059. Replacement parts have been sent. We will advise when the workstation is restored. END PROBLEM RESOLUTION REPORT IDA1995:005 1995/06/12 IDA Peter Davis Description of Problem Resolution Resolution The Sun workstation at WRAB was replaced and began functioning again on 1995145. END **************************************************************************** DATA PROBLEM REPORT IDA1995:006 1995/03/08 IDA DCC Peter Davis IDA KIV II *** 1995,058,14:40:00 1995,066,10:10:00 Problem Description OTHER Station was down because of damage to uplink cable. The cable has been repaired, and the station is again operational. END **************************************************************************** DATA PROBLEM REPORT IDA1995:007 1995/03/21 IDA DCC Peter Davis IDA BORG II *** 1995,330,23:00:00 1995,343,11:00:00 Problem Description OTHER Data acquisition halted because of communication difficulties between the ARS and DAS. Acquisition resumed after the DAS was rebooted on 1995343. END **************************************************************************** DATA PROBLEM REPORT IDA1995:008 1995/04/12 IDA DCC Peter Davis IDA BRVK II *HN,*HE 1994,244,00:00:00 1995,090,00:00:00 Problem Description CHANNEL ORIENTATION Comparison with data from other broadband sensors at the Borovoye complex, as well as analysis at UCSD of long-period surface waves with uniform azimuthal distribution, indicated that the horizontal STS-1 sensors at Borovoye had been initially set up with an orientation of N351degE, N81degE, 9 degrees counterclockwise from North. (An inconsistency had been noted during the installation trip between the indicated direction of N in the IRIS instrument room and the indicated direction of N in adjacent instrument rooms in the BRVK vault complex). The sensors were rotated clockwise 9 degrees on April 4, and are now oriented N0E, N90E. END **************************************************************************** DATA PROBLEM REPORT IDA1995:009 1995/08/31 IDA DCC Peter Davis IDA MSEY II S*N,S*E 1995,135,00:00:00 1995,135,00:00:00 Problem Description CHANNEL ORIENTATION Analysis of seismic data indicates the horizontal components of the Guralp CMG-3T seismometer are rotated 21 degrees clockwise with respect to standard N-S/E-W since installation. That is, the north-south component is aligned along azimuth=21 degrees and the east-west component, along azimuth=111 degrees. END **************************************************************************** DATA PROBLEM REPORT IDA1995:010 1995/11/15 IDA DCC Peter Davis IDA SHEL II **N,**E 95,170 1900,000,00:00:00 1900,000,00:00:00 Problem Description SUPPLEMENTAL Re-analysis of installation information indicates the horizontal components of the KS-54000 are rotated 30 degrees clockwise with respect to standard N-S/E-W since installation. That is, the north-south component is aligned along azimuth=30 degrees and the east-west component, along azimuth=120 degrees. Analysis of seismic data indicates the horizontal components of the STS-2 are rotated approximately 3.5 degrees counter-clockwise with respect to the KS-54000. That is, the north-south component is aligned along azimuth=26.5 degrees and the east-west component, along azimuth=116.5 degrees. This estimate will be refined after the station has been operational for a longer period of time. Because the FBA-23 installed at SHEL was aligned in the same fashion as the others, it should be treated as having approximately the same orientation as the STS-2. END PROBLEM RESOLUTION REPORT IDA1995:010 1995/11/15 IDA Peter Davis Description of Problem Resolution SUPPLEMENT Re-analysis of installation information indicates the horizontal components of the KS-54000 are rotated 30 degrees clockwise with respect to standard N-S/E-W since installation. That is, the north-south component is aligned along azimuth=30 degrees and the east-west component, along azimuth=120 degrees. Analysis of seismic data indicates the horizontal components of the STS-2 are rotated approximately 3.5 degrees counter-clockwise with respect to the KS-54000. That is, the north-south component is aligned along azimuth=26.5 degrees and the east-west component, along azimuth=116.5 degrees. This estimate will be refined after the station has been operational for a longer period of time. Because the FBA-23 installed at SHEL was aligned in the same fashion as the others, it should be treated as having approximately the same orientation as the STS-2. END **************************************************************************** DATA PROBLEM REPORT IDA1995:011 1995/12/22 IDA DCC Peter Davis IDA AAK II B**,VH* 94,012 1900,000,00:00:00 1900,000,00:00:00 Problem Description INVALID RESPONSE Quality control analysis has uncovered a problem with the gains of all data channels connected to the STS-1 at AAK since the data logger there was upgraded on 1994012. The value previously reported was a factor of 2.0 too large. The response for AAK now listed in the dataless SEED volume IDA_SEED_951221 has been corrected. END **************************************************************************** DATA PROBLEM REPORT IDA1995:012 1995/02/14 IDA DCC Peter Davis IDA PFO TS B*N,VHN 1994,357,00:00:00 1995,033,00:00:00 1995,033,00:00:00 Problem Description OTHER A degredation of data quality on all NS data channels was traced to the STS-1 seismometer. The instrument was replaced on 1995033. END **************************************************************************** DATA PROBLEM REPORT IDA1995:013 1995/01/10 IDA DCC Peter Davis IDA PFO TS BHE,BLE,VHE 1994,186,00:00:00 1994,186,00:00:00 Problem Description OTHER The performance of the EW STS-1 at PFO has gradually degraded since fire swept through the Observatory on the above date. The problem was believed to originate with the buffer box, which was replaced on 1994228. However, during a three day period beginning around day 1994250, VHE noise increased to a level 20x greater than on VHN. The problem is now thought to center on the STS-1 sensor itself, and steps are being taken to isolate and correct the problem. END PROBLEM RESOLUTION REPORT IDA1995:013 1995/02/14 IDA Peter Davis Description of Problem Resolution Resolution The EW STS-1 at PFO was replaced on 1995019. The quality of the data from the EW seismic channels has returned to normal. END **************************************************************************** DATA PROBLEM REPORT ASL2006:242 2006/12/14 ASL DCC Valerie Peyton ASL COLA IU */* 2006,322,11:04:00 2006,332,13:27:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 454 Timing MAY be in error, as GPS system is not operating consistently. The GPS system at COLA was having difficulty maintaining its lock on the GPS time marks. Timing quality cannot be guaranteed. END PROBLEM RESOLUTION REPORT ASL2006:242 2006/12/14 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The COLA GPS system resumed solid lock on the GPS time marks. Timing quality returns to normal at 2006, 332, 13:27. END **************************************************************************** DATA PROBLEM REPORT ASL2006:243 2006/12/14 ASL DCC Valerie Peyton ASL BILL IU 00/*HZ 2006,348,00:51:00 2006,346,12:48:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The BILL STS1 Z mass has fallen against its stop. Data are not useable. 2006/12/15 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The BILL station operator recentered the STS1 Z component. Data quality returns to normal at 2006, 346, 12:48. END **************************************************************************** DATA PROBLEM REPORT ASL2006:244 2006/12/14 ASL DCC Valerie Peyton ASL SSPA IU 10/*H* 2006,340,10:26:00 2006,344,15:41:00 Problem Description OTHER SEED COMMENT REFERENCE C 4400 Channel data quality is very poor. Frequent recenterings of the SSPA STS2 made a mess of the data during this time. END PROBLEM RESOLUTION REPORT ASL2006:244 2006/12/14 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The SSPA STS2 recenterings ended. Data quality returns to normal at 2006, 344, 15:41. END **************************************************************************** DATA PROBLEM REPORT ASL2006:245 2006/12/15 ASL DCC Valerie Peyton ASL BILL IU 00/*HE 2006,349,12:27:00 2006,350,22:14:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The BILL STS1 E component is currently producing a massive square wave with a period of 900 seconds and an amplitude of several million counts. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2006:245 2006/12/18 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The BILL station operator fixed the problem with the STS1 E component. Data quality returns to normal at 2006, 350, 22:14. END **************************************************************************** DATA PROBLEM REPORT ASL2006:240 2006/12/11 ASL DCC Valerie Peyton ASL SFJD IU 00/*HE 2006,344,00:31:00 2006,344,00:31:00 Problem Description NOISE SEED COMMENT REFERENCE C 4504 Channel exibits high levels of low frequency noise. The SFJD STS1 E component has developed a long-period noise problem. Noise levels are 5dB to 40dB higher than they should be, starting at 0.1 Hz and continuing through all the lower frequencies. END PROBLEM RESOLUTION REPORT ASL2006:240 2006/12/12 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The long-period noise on the SFJD STS1 E component disappeared of its own accord. Data quality returns to normal at 2006, 345, 21:53. END **************************************************************************** DATA PROBLEM REPORT ASL2006:241 2006/12/14 ASL DCC Valerie Peyton ASL LSA IC 10/*HE 2006,347,18:03:00 2006,351,15:14:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The E component of the LSA STS2 is intermittantly dead. During those times when it is not working, data are not useable. The rest of the time the data are good. END PROBLEM RESOLUTION REPORT ASL2006:241 2006/12/18 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The E component of the LSA STS2 revived on its own. Data quality returns to normal at 2006, 351, 15:14. END **************************************************************************** DATA PROBLEM REPORT ASL2006:246 2006/12/28 ASL DCC Tyler Storm ASL PAB IU */?HE 2006,362,09:25:00 2007,018,10:34:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. Mass is pegged. END PROBLEM RESOLUTION REPORT ASL2006:246 2007/01/18 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The PAB station operator recentered the STS1 E component. Data qualty returns to normal at 2007, 018, 10:34. END **************************************************************************** DATA PROBLEM REPORT DMCQC2016:0218 2016/01/08 IRIS DMC Gillian Sharer DMC 154A N4 ?HZ 2015,349,00:10:00 2015,349,02:20:00 Problem Description INVALID RESPONS On December 15, 2015 (105.349), N4.154A..?HZ suffered a sudden reduction of amplitudes by approximately 50% along with a change in dc offset of 2500 counts. This likely indicates a differential output issue. END PROBLEM RESOLUTION REPORT DMCQC2016:0218 2016/01/08 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The problem resolved itself spontaneously 2 hours later, with a recovery of amplitudes and dc offset. END **************************************************************************** DATA PROBLEM REPORT DMCQC2016:0219 2016/01/08 IRIS DMC Gillian Sharer DMC 154A N4 ?HZ 2015,358,22:28:00 2015,359,08:13:00 Problem Description INVALID RESPONSE On December 24, 2015 22:28 UTC, N4.154A..?HZ suffered a sudden reduction of amplitudes by approximately 50% along with a change in dc offset of 2500 counts. This likely indicates a differential output issue. END PROBLEM RESOLUTION REPORT DMCQC2016:0219 2016/01/08 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The problem resolved itself spontaneously on December 29, 2015 08:13 UTC, with a recovery of amplitudes and dc offset. END **************************************************************************** DATA PROBLEM REPORT ASL1996:057 1996/12/23 ASL DCC Tyler Storm ASL BJT IC SHZ, EHZ 1996,304,01:28:00 1996,351,00:00:00 Problem Description HIGH FREQUENCY NOISE SEED COMMENT REFERENCE C 4510 Channel has frequent spiking. Vertical short-period data contains high-frequency noise. END PROBLEM RESOLUTION REPORT ASL1996:057 1996/12/23 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION The high-frequency spiking was cause by a loose connection on the instrument. The data are back to normal as of 16 Dec 96. END **************************************************************************** DATA PROBLEM REPORT ASL1996:056 1996/12/23 ASL DCC Tyler Storm ASL SDV IU BHZ, BHN, BHE 1996,314,18:45:00 1996,318,14:16:00 Problem Description HIGH FREQUENCY NOISE SEED COMMENT REFERENCE C 4510 Channel has frequent spiking. There are "clusters" of high-frequency noise in the SDV broad-band data. The frequency of the noise appears (may be higher) to be around 6hz, and the duration of each individual cluster is usually two seconds. END PROBLEM RESOLUTION REPORT ASL1996:056 2004/03/16 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The clusters of high-frequency noise on the SDV STS1 BH* channels ended as mysteriously and abruptly as they started. Data quality returns to normal at 1996, 318, 14:16. END **************************************************************************** DATA PROBLEM REPORT ASL1996:055 1996/12/19 ASL DCC Tyler Storm ASL LZH CD VHZ 1996,311,03:38:00 1996,331,01:44:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. VHZ is dead during this time frame. END PROBLEM RESOLUTION REPORT ASL1996:055 2006/07/26 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The VHZ channel at LZH was fixed. Data quality returns to normal at 1996, 331, 01:44. END **************************************************************************** DATA PROBLEM REPORT IDA2008:069 2008/12/29 IDA DCC Erik Klimczak IDA SACV II *** 2008,294,00:00:00 2008,329,00:00:00 Problem Description OTHER IDA station SACV was down from about day 2008,294 to 2008,329 due to power problems and a faulty GPS clock. Data acquisition resumed after the station operator restored power and replaced the GPS clock. END **************************************************************************** DATA PROBLEM REPORT ASL1996:054 1996/12/19 ASL DCC Tyler Storm ASL ENH CD VHE 1992,341,00:00:00 1997,104,20:32:00 Problem Description NOISE SEED COMMENT REFERENCE C 4500 Channel has high noise background. Beginning on 1992, 341, the E/W component of the STS1 at ENH gradually develops a long period noise problem. By 1996, 250, the E/W noise level is approximately five times higher than the N/S level. END PROBLEM RESOLUTION REPORT ASL1996:054 2004/03/04 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The noise problem on the E/W component of the STS1 at ENH resolves itself at 1997, 104, 20:32. Noise levels and data quality return to normal at this time. END **************************************************************************** DATA PROBLEM REPORT IDA2008:068 2008/12/29 IDA DCC Erik Klimczak IDA PFO II LN*00,EN*00 2008,142,00:00:00 2008,339,00:00:00 Problem Description DEAD CHANNEL The vertical and horizontal channels from the Episensor accelerometer were non-seismic due to a faulty sensor. The channels were restored after an IDA engineer visited the station and replaced the sensor. END **************************************************************************** DATA PROBLEM REPORT ASL1996:053 1996/12/18 ASL DCC Tyler Storm ASL SFJ IU BH?, LH?, VH?, UH? LL?, HL? 1996,244,00:00:00 1996,266,00:00:00 Problem Description OTHER These channels were not recorded at the station due to a hardware failure. END PROBLEM RESOLUTION REPORT ASL1996:053 1996/12/18 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION The faulty hardware was replaced on 22 Sept, and SFJ is once again recording the complete data set. END **************************************************************************** DATA PROBLEM REPORT IDA2008:067 2008/12/29 IDA DCC Erik Klimczak IDA RPN II BBN-00 2008,304,00:00:00 2008,304,00:00:00 Problem Description DEAD CHANNEL The North-South channels from the STS-1 seismometer are non-seismic as of about day 2008,304 for reasons yet to be determined. A faulty sensor is suspected. END **************************************************************************** DATA PROBLEM REPORT ASL1996:052 1996/12/11 ASL DCC Tyler Storm ASL MDJ IC BHN, BHE, LHN, LHE, VHN, VHE, UHN, UHE 1996,314,00:00:00 1996,347,01:22:00 Problem Description POLARITY REVERSED SEED COMMENT REFERENCE C 4710 Channel has reversed polarity. Data from the horizontal STS-1 instruments have reversed polarity. END PROBLEM RESOLUTION REPORT ASL1996:052 1997/01/10 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION The polarities are correct as of 12 Dec 96, 01:22 UTC. This polarity reversal is also documented in the meta-data (or dataless SEED). Thus, if rdseed is used to extract these data, and if the option to check reversals is used, the data will be extracted with the proper polarity. Please be sure to use the most recent version of the IC/MDJ dataless SEED. END **************************************************************************** DATA PROBLEM REPORT IDA2008:066 2008/12/29 IDA DCC Erik Klimczak IDA RPN II BB*00,LN*00,EN*00 2008,304,00:00:00 2008,304,00:00:00 Problem Description Problem Description DEAD CHANNEL The horizontal and vertical channels from the STS-1 and FBA-23 sensors were non-seismic from about day 2008,304-10:56 to 2008,305-11:00 due to problems with the sensors. Normal data acquisition has resumed for all except the North- South channels from the STS-1. END **************************************************************************** DATA PROBLEM REPORT ASL1996:051 1996/12/04 ASL DCC Tyler Storm ASL CCM IU ? 1996,330,15:00:00 1996,339,22:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. Station is dead. END PROBLEM RESOLUTION REPORT ASL1996:051 1996/12/11 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION Station is back up 1996,340. END **************************************************************************** DATA PROBLEM REPORT IDA2008:065 2008/12/29 IDA DCC Erik Klimczak IDA NIL II *** 2008,308,00:00:00 2008,312,00:00:00 Problem Description OTHER IDA station NIL was down from about day 2008,308 to 2008,312 due to damage to a cable between the ARS and the DAS caused by construction near the station. END **************************************************************************** DATA PROBLEM REPORT ASL1996:050 1996/12/04 ASL DCC Tyler Storm ASL HRV IU ? 1996,338,00:00:00 1996,343,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. ASL field engineers are on site installing warpless base plates for the STS-1 instruments. During this time frame there will be occasional outages as well as other distrubances while people are working in the vault. END PROBLEM RESOLUTION REPORT ASL1996:050 2001/12/07 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION ASL field engineers left station HRV in fully operational order on 1996, 343. Data quality returned to normal after all installation and testing work was completed. END **************************************************************************** DATA PROBLEM REPORT IDA2008:064 2008/12/29 IDA DCC Erik Klimczak IDA CMLA II *** 2008,300,00:00:00 2008,361,00:00:00 Problem Description OTHER IDA station CMLA was down due to problems with the DAS. The station came back online after a replacement DAS shipped to the station was installed by the station operator. END **************************************************************************** DATA PROBLEM REPORT ASL1996:058 1996/12/24 ASL DCC Tyler Storm ASL TIXI IU BHZ, LHZ, VHZ, UHZ 1996,312,15:43:00 1996,316,09:20:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The mass is "pegged" in the vertical instrument. Vertical data are unusable. END PROBLEM RESOLUTION REPORT ASL1996:058 1996/12/24 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION The mass was recentered at 09:20 UTC, 11 Nov 96. END **************************************************************************** DATA PROBLEM REPORT ASL1996:046 1996/11/15 ASL DCC Tyler Storm ASL TIXI IU BHZ LHZ UHZ VHZ 1996,263,23:15:00 1996,266,14:00:00 Problem Description OTHER SEED COMMENT REFERENCE C 4010 Channel is down. The vertical broad-band data is unusable during this time frame. END PROBLEM RESOLUTION REPORT ASL1996:046 1996/11/15 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION I don't know what the problem was, but the data returned to normal at 14:00 UTC, on 22 Sept. END **************************************************************************** DATA PROBLEM REPORT ASL1996:045 1996/11/15 ASL DCC Tyler Storm ASL COR IU ?HE 1996,176,03:44:00 1997,301,05:00:00 Problem Description OTHER SEED COMMENT REFERENCE C 4510 Channel has frequent spiking. There is a fairly large pulse every 1.6 hours on the broad-band E/W data. This pulsing begins below the noise on 1996, 176. By 1996, 180 the spikes are barely visible above the noise and they continue to grow in amplitude over time until they are painfully obvious. END PROBLEM RESOLUTION REPORT ASL1996:045 2001/03/29 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The amplitude of the spikes on the E component at COR slowly dies below the noise until it disappears completely on 1997, 301. The source of the spikes was not determined, nor do we know why they went away. END **************************************************************************** DATA PROBLEM REPORT ASL1996:044 1996/11/15 ASL DCC Tyler Storm ASL MA2 IU BHE, LHE, VHE, UHE 1996,238,08:01:00 1996,239,23:50:00 Problem Description OTHER SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The mass in the E/W Streckeisen is "pegged"; data is unusable. END PROBLEM RESOLUTION REPORT ASL1996:044 2007/01/16 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The MA2 station operator recentered the STS1 E component. Data quality returns to normal at 1996, 239, 23:50. END **************************************************************************** DATA PROBLEM REPORT ASL1996:043 1996/11/15 ASL DCC Tyler Storm ASL SSE IC HHE, SHE 1996,263,00:00:00 1996,263,00:00:00 Problem Description POLARITY REVERSED The E/W data from the STS-2 instrument have reversed polarity. END PROBLEM RESOLUTION REPORT ASL1996:043 1996/11/15 ASL DCC Tyler Storm Description of Problem Resolution COMMENT Our local China field engineer should be able to get to the station, and fix the problem, around March of 97. END **************************************************************************** DATA PROBLEM REPORT ASL1996:042 1996/11/07 ASL DCC Tyler Storm ASL ANTO IU ?HE 1996,287,04:35:00 1996,306,14:10:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The E/W channels were dead during this time frame. END PROBLEM RESOLUTION REPORT ASL1996:042 1996/11/07 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION E/W channels came back on line on 1 Nov 96. END **************************************************************************** DATA PROBLEM REPORT ASL1996:041 1996/11/07 ASL DCC Tyler Storm ASL INCN IU SH*, EH* 1996,269,00:00:00 1996,269,00:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The Z, and E/W streams from the STS-2 at INCN are dead. END PROBLEM RESOLUTION REPORT ASL1996:041 1996/12/20 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION The INCN Z, and E/W channels (from the STS-2) are back on line 1996, 318, 01:19. END **************************************************************************** DATA PROBLEM REPORT ASL1996:040 1996/10/11 ASL DCC Tyler Storm ASL SPA IU ?HN, ?HE 1991,352,00:00:00 1996,344,00:00:00 Problem Description CHANNEL ORIENTATION SEED COMMENT REFERENCE C 1825 Seismometer has non-standard orientation. The N/S, and E/W instruments at SPA are mis-oriented by 115 degrees. END PROBLEM RESOLUTION REPORT ASL1996:040 1996/10/11 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION The new dataless SEED (which will build tonight, 16 Oct 96) will reflect the error. Instead of the N/S and E/W azimuths being set to the normal 0, and 90 degrees, they are 245, and 335 degrees, respectively. SUPPLEMENT The station IU/SPA was moved on 1996, 344. Beginning at that time, sensor orientations were reset to 0 and 90 degrees. This is reflected in the dataless. Correct orientations for all epochs can be obtained when using rdseed if the "check reversal" option is invoked. END **************************************************************************** DATA PROBLEM REPORT ASL1996:049 1996/12/04 ASL DCC Tyler Storm ASL TBT IU ?HZ 1995,336,00:00:00 1996,327,00:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The vertical instrument was disconnected during this time frame. END PROBLEM RESOLUTION REPORT ASL1996:049 1996/12/04 ASL DCC Tyler Storm Description of Problem Resolution COMMENT Just for clarification...this is what happened: For a very long while, the vertical data was degraded due to excessive corrosion in the feedback electronics box for the vertical instrument. Around Dec 95, the data was getting to the point where it was unusable (i.e. huge spiking, and data between the spikes wasn't much better). At this point, the spiking was so bad it was causing the event detector to trigger continuously and fill up the tapes too fast. Since the data was useless anyway, we had the operator disconnect the instrument until the problem could be solved. It should be NOTED when the new feedback electronics unit was coupled to the old seis (1996,327), it changed the sensitivity quite a bit. The current sensitivity is around 35% of the old value. Anyone using this data should download the new dataless. END **************************************************************************** DATA PROBLEM REPORT ASL1996:048 1996/12/04 ASL DCC Tyler Storm ASL KMBO IU ? 1996,326,00:00:00 1996,326,00:00:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 400 Station has clock problems. Timing is one minute off. END **************************************************************************** DATA PROBLEM REPORT ASL1996:047 1996/11/22 ASL DCC Tyler Storm ASL TUC IU ? 1992,165,00:00:00 1992,252,16:00:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 550 Time may be 1 minute fast. Time is incorrect by one minute. END PROBLEM RESOLUTION REPORT ASL1996:047 1996/11/22 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION The clock was reset to the correct minute at 16:00 UTC on day 1992,252. END **************************************************************************** DATA PROBLEM REPORT ASL2006:220 2006/11/09 ASL DCC Valerie Peyton ASL KIEV IU 10/*H* 2006,312,22:57:00 2006,313,08:08:00 Problem Description OTHER SEED COMMENT REFERENCE C 1840 Calibration data Calibrations were run on the KIEV S13 seismometers during this time. END PROBLEM RESOLUTION REPORT ASL2006:220 2006/11/09 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The KIEV S13 calibrations ended at 2006, 313, 08:08. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2006:221 2006/11/13 ASL DCC Valerie Peyton ASL PTCN IU 00/*HZ 2006,260,16:58:00 2006,260,16:58:00 Problem Description NOISE SEED COMMENT REFERENCE C 4509 Channel has elevated low frequency noise levels. The Z component of the STS2 at PTCN has developed an lp noise problem. Noise levels are up to 30dB higher than they should be, starting at 100 seconds. END **************************************************************************** DATA PROBLEM REPORT ASL2006:222 2006/11/13 ASL DCC Valerie Peyton ASL MSKU IU 10/*HN 10/*HE 2006,314,20:34:00 2006,314,20:34:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The N and E component of the CMG3-T at MSKU appear to have fallen against their stops. Data are not useable. END **************************************************************************** DATA PROBLEM REPORT ASL2006:223 2006/11/13 ASL DCC Valerie Peyton ASL RAR IU 10/*HN 2006,317,01:00:00 2006,339,23:18:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The N component of the CMG3-T at RAR has fallen against its stop. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2006:223 2006/12/06 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The RAR CMG3-T was replaced, and the new sensor has a working N component. Data quality returns to normal at 2006, 339, 23:18. END **************************************************************************** DATA PROBLEM REPORT ASL2006:228 2006/11/28 ASL DCC Valerie Peyton ASL TIXI IU 00/*HN 2006,330,02:41:00 2006,337,04:15:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The N component of the STS1 at TIXI is dead. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2006:228 2006/12/04 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The TIXI station operator repaired the STS1 N component. Data quality returns to normal at 2006, 337, 04:15. END **************************************************************************** DATA PROBLEM REPORT ASL2006:229 2006/11/28 ASL DCC Valerie Peyton ASL QSPA IU 20/*H* 2006,330,13:51:00 2006,331,21:11:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. All three components of the QSPA STS2 have fallen against their stops. At first, large events may be visible. Beyond that, data are not useable. END PROBLEM RESOLUTION REPORT ASL2006:229 2006/11/28 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION We were able to remotely recenter the QSPA STS2. Data quality returns to normal at 2006, 331, 21:11. END **************************************************************************** DATA PROBLEM REPORT ASL2006:224 2006/11/13 ASL DCC Valerie Peyton ASL ANMO IU 00/*H* 2006,109,12:59:00 2006,110,02:20:00 Problem Description OTHER SEED COMMENT REFERENCE C 1840 Calibration data Calibrations were run on the ANMO 54000 during this time frame. Data are not useful for earthquake analysis. END PROBLEM RESOLUTION REPORT ASL2006:224 2006/11/13 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The ANMO 54000 calibrations ended at 2006, 110, 02:20. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2006:225 2006/11/15 ASL DCC Valerie Peyton ASL LVC IU 10/*HN 2006,318,22:22:00 2006,347,18:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The N component of the CMG3-T at LVC has fallen against its stop. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2006:225 2006/12/14 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The LVC station operator recentered the CMG3-T. Data quality returns to normal at 2006, 347, 18:00. END **************************************************************************** DATA PROBLEM REPORT ASL2006:226 2006/11/15 ASL DCC Valerie Peyton ASL MSKU IU 10/*HZ 2006,318,10:07:00 2006,318,10:07:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The Z component of the CMG3-T at MSKU has fallen against its stop. Data are not useable. END **************************************************************************** DATA PROBLEM REPORT ASL2006:227 2006/11/20 ASL DCC Valerie Peyton ASL KONO IU 10/*H* 2006,319,17:49:00 2006,319,18:30:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The KONO station operator was replacing the CMG3-T during this time. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2006:227 2006/11/20 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The KONO station operator finished installation of the new CMG3-T at 2006, 319, 18:30. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL1996:034 1996/09/13 ASL DCC Tyler Storm ASL MAJO IU ?HZ 1996,244,17:31:00 1996,244,23:51:00 Problem Description NOISE SEED COMMENT REFERENCE C 2008 Long period "burps". There are large pulses in the vertical broad-band data during this time frame. END PROBLEM RESOLUTION REPORT ASL1996:034 1996/09/13 ASL DCC Tyler Storm Description of Problem Resolution COMMENT This appears to be an isolated incident. No further action will be taken at this time. END **************************************************************************** DATA PROBLEM REPORT ASL1996:033 1996/08/28 ASL DCC Tyler Storm ASL ANTO IU BHE, LHE, VHE, UHE 1996,189,13:40:00 1996,206,12:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. E/W broad-band channels are dead. END PROBLEM RESOLUTION REPORT ASL1996:033 1996/08/28 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION E/W broad-band data is back on line at 1996, 206, 12:00 UTC. END **************************************************************************** DATA PROBLEM REPORT ASL1996:032 1996/08/27 ASL DCC Tyler Storm ASL ULN IU ? 1996,238,00:00:00 1996,240,08:00:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. Data are intermittently dead or unusable during this time frame. END PROBLEM RESOLUTION REPORT ASL1996:032 1996/08/27 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION The data are back to normal at 08:00 UTC, 27 Aug 96. A field engineer was on site, working a a noisy vertical seismometer, during this time frame. END **************************************************************************** DATA PROBLEM REPORT ASL1996:031 1996/08/26 ASL DCC Tyler Storm ASL SPA IU BHN,LHN,VHN,UHN 1996,229,03:42:00 1996,237,06:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. N/S broad-band data are dead. END **************************************************************************** DATA PROBLEM REPORT ASL1996:030 1996/08/23 ASL DCC Tyler Storm ASL SPA IU BHN, LHN, VHN, UHN 1996,210,01:12:00 1996,214,05:40:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. N/S broad-band data are dead during this time frame. END PROBLEM RESOLUTION REPORT ASL1996:030 1996/08/26 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION N/S mass was re-centered on 1 Aug 1996, at 05:40 UTC. END **************************************************************************** DATA PROBLEM REPORT ASL1996:039 1996/10/09 ASL DCC Tyler Storm ASL TUC IU ?HE 1996,275,05:13:00 1996,283,18:23:00 Problem Description DEAD CHANNEL The E/W broad-band streams are not present during this time frame. END PROBLEM RESOLUTION REPORT ASL1996:039 1996/10/09 ASL DCC Tyler Storm Description of Problem Resolution COMMENT I viewed the on-line holdings of TUC (via dialup session) and noticed the E/W streams start up again at 18:23 on 9 Oct. No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT ASL1996:038 1996/10/08 ASL DCC Tyler Storm ASL SSE IC SH?, HH? 1996,263,00:00:00 1996,263,00:00:00 Problem Description POLARITY REVERSED Data from the STS-2 instrument at SSE have reversed polarity. END PROBLEM RESOLUTION REPORT ASL1996:038 1996/11/14 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION The polarities for the Z, and N/S data were only reversed for a little more than a day. From day 1996,265 on, the Z, and N/S polarities are correct for the STS-2 data. However, the E/W data still have reversed polarities. I will file a separate DPR to track the continuing problem with the E/W data. END **************************************************************************** DATA PROBLEM REPORT ASL1996:037 1996/10/01 ASL DCC Tyler Storm ASL YSS IU BHZ, LHZ, UHZ, VHZ 1996,182,22:48:00 1997,240,23:25:00 Problem Description OTHER SEED COMMENT REFERENCE C 4810 Channel has transient long period signals. There is a large pulse on the vertical broad-band streams. It takes approximately ten minutes for the noise levels to return to normal following the disturbance. END PROBLEM RESOLUTION REPORT ASL1996:037 1997/06/10 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION The vertical instrument still has some sort of a problem. With any decent size event (including teleseisms) I see a very large 300 second pulse which oscillates for a few cycles. Possibly the damping, or some other adjustment, is out of sorts. We will continue to work with the station operators until we can find a solution. Resolution (2000/03/30): The pulses, which varied in duration from 200 to 900 seconds began occuring on 1996,182,22:48. The last observed pulse is late in the day on 1997,240. Not long after this pulse a calibration pulse is observed on all three components of the STS1. It appears that the station operator was in the vault doing something to the instruments, and after the calibration pulse the random large pulses on the vertical are seen no more. We have no idea what produced the pulsing, or what exactly cured it. Since 1997,240,23:25, however, we have no more observations of pulsing on the vertical component of the STS1. END **************************************************************************** DATA PROBLEM REPORT ASL1996:036 1996/09/13 ASL DCC Tyler Storm ASL YAK IU EH?, SH? 1993,243,00:00:00 1996,256,00:00:00 Problem Description INVALID RESPONSE The reported gains for these channels were approximately 2x the actual value during this time fame. END PROBLEM RESOLUTION REPORT ASL1996:036 1996/09/13 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION The response is correct as of today, 13 Sept 96. The problem most likely occurred because a db attenuation switch was set one click (6db) too high. A 6db increase in attenuation will yield approximately 1/2 the gain. END **************************************************************************** DATA PROBLEM REPORT ASL2006:231 2006/11/29 ASL DCC Valerie Peyton ASL BJT IC 00/*H* 2006,332,02:00:00 2006,332,03:11:00 Problem Description OTHER SEED COMMENT REFERENCE C 1836 Instrument maintenance. Tests may be in progress. The BJT station operator was working on the STS1 instruments during this time. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2006:231 2006/11/29 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The BJT station operator finished working on the STS1 instruments. Data quality returns to normal at 2006, 332, 03:11. END **************************************************************************** DATA PROBLEM REPORT ASL2006:232 2006/11/29 ASL DCC Valerie Peyton ASL BJT IC 00/*H* 2006,333,02:22:00 2006,333,08:09:00 Problem Description OTHER SEED COMMENT REFERENCE C 1836 Instrument maintenance. Tests may be in progress. The BJT station operator was working on the STS1 instruments during this time. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2006:232 2006/11/29 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The BJT station operator finished working on the STS1 instruments. Data quality returns to normal at 2006, 333, 08:09. END **************************************************************************** DATA PROBLEM REPORT ASL2006:233 2006/11/29 ASL DCC Valerie Peyton ASL BJT IC 00/*HN 2006,333,08:08:00 2006,335,07:13:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The BJT STS1 N component appears to have fallen against its stop. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2006:233 2006/12/01 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The BJT station operator recentered the STS1 N component. Data quality returns to normal at 2006, 335, 07:13. END **************************************************************************** DATA PROBLEM REPORT ASL2006:234 2006/11/30 ASL DCC Valerie Peyton ASL BILL IU 00/*HE 2006,334,01:48:00 2006,334,01:48:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The BILL STS1 E component has fallen against its stop. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2006:234 2006/12/01 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The BILL station operator recentere the STS1 E component. Data quality returns to normal at 2006, 335, 04:22. END **************************************************************************** DATA PROBLEM REPORT ASL2006:230 2006/11/28 ASL DCC Valerie Peyton ASL TATO IU 10/*H* 2006,326,14:26:00 2006,331,08:14:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. All three components of the TATO STS2 have fallen against their stops. At first, large events may be visible. Beyond that, data are not useable. END PROBLEM RESOLUTION REPORT ASL2006:230 2006/11/28 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The TATO STS2 was recentered. Data quality returns to normal at 2006, 331, 08:14. END **************************************************************************** DATA PROBLEM REPORT IDA2008:063 2008/12/29 IDA DCC Erik Klimczak IDA KAPI II BHN-00,LHN-00,VHN-00 1900,000,00:00:00 1900,000,00:00:00 Problem Description Problem Description OTHER The North-South channels from the KS-54000 seismometer were showing excessive spiking from about day 2008,312 to 2008,338 due to a faulty circuit board in the DAS. The channels were restored after an IDA engineer repaired a KS-54000 cable and termination box. END **************************************************************************** DATA PROBLEM REPORT ASL2006:239 2006/12/07 ASL DCC Valerie Peyton ASL ADK IU 00/*HZ 00/*HE 2006,340,22:03:00 2006,341,23:09:00 Problem Description OTHER SEED COMMENT REFERENCE C 4331 Vertical and east-west inputs swapped (ie Z <=> E). During this time period, the STS1 E data from ADK was being recorded on the STS1 Z channel, and vice versa. END PROBLEM RESOLUTION REPORT ASL2006:239 2006/12/07 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION An ASL field engineer on location at ADK swapped the STS1 E and Z inputs. As of 2006, 341, 23:09, these components are once more being recorded on the correct channels. END **************************************************************************** DATA PROBLEM REPORT IDA2008:062 2008/12/29 IDA DCC Erik Klimczak IDA KAPI II *** 2008,297,00:00:00 2008,303,00:00:00 Problem Description OTHER IDA station KAPI was down from about day 2008,297 to 2008,303 due to communication problems between the DAS and the ISP. Data acquisition resumed after power was cycled to the DAS. END **************************************************************************** DATA PROBLEM REPORT IDA2008:061 2008/12/29 IDA DCC Erik Klimczak IDA KWAJ II *** 2008,291,00:00:00 2008,303,00:00:00 Problem Description OTHER IDA station KWAJ was down from about day 2008,291 to 2008,303 due to communication problems between the DAS and the ISP. Data acquisition was restored after the station operator cycled power to the DAS. END **************************************************************************** DATA PROBLEM REPORT IDA2008:060 2008/12/29 IDA DCC Erik Klimczak IDA PALK II *** 2008,313,00:00:00 2008,313,00:00:00 Problem Description OTHER IDA station PALK is down since about day 2008,313 due to problems with the DAS. END **************************************************************************** DATA PROBLEM REPORT ASL2006:235 2006/12/06 ASL DCC Valerie Peyton ASL RAR IU 10/*H* 2006,339,22:45:00 2006,339,23:18:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. All three components of the RAR CMG3-T were down while the instrument was being replaced. END PROBLEM RESOLUTION REPORT ASL2006:235 2006/12/06 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The new RAR CMG3-T began operating at 2006, 339, 23:18. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2006:236 2006/12/06 ASL DCC Valerie Peyton ASL ADK IU 00/*H* 2006,339,14:07:00 2006,340,23:21:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. All three components of the ADK STS1 are inoperational. Data is not useable. END PROBLEM RESOLUTION REPORT ASL2006:236 2006/12/07 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION An ASL field engineer replaced the DMA-1 box at ADK, returning the STS1 instruments to service. Data quality returns to normal at 2006, 340, 23:21. END **************************************************************************** DATA PROBLEM REPORT ASL2006:237 2006/12/07 ASL DCC Valerie Peyton ASL ADK IU */* 2006,338,00:00:00 2006,344,02:04:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. An ASL field engineer is on site at ADK for station maintenance. Expect variable data quality and availability, as well as tests and calibrations. END PROBLEM RESOLUTION REPORT ASL2006:237 2006/12/11 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The ASL field engineer left ADK in excellent operational condition. Data quality returns to normal at 2006, 344, 02:04. END **************************************************************************** DATA PROBLEM REPORT ASL2006:238 2006/12/07 ASL DCC Valerie Peyton ASL LSA IC 10/*HE 2006,340,10:00:00 2006,343,15:15:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The E component of the LSA STS2 is dead. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2006:238 2006/12/11 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The E component of the LSA STS2 revived on its own. Data quality returns to normal at 2006, 343, 15:15. END **************************************************************************** DATA PROBLEM REPORT ASL1996:024 1996/07/16 ASL DCC Tyler Storm ASL YSS IU LH? 1996,197,21:40:08 1996,197,21:40:08 Problem Description DEAD CHANNEL The LHZ data stream "flatlines" at 21:39:29 UTC. The LHN data stream stops at 22:10:00 UTC. The LHE data stream stops at 21:40:08 UTC. END PROBLEM RESOLUTION REPORT ASL1996:024 1996/07/16 ASL DCC Tyler Storm Description of Problem Resolution COMMENT It's possible some of the problem was a bad connection when SPYDER was pulling over the data. I tried to verify this via dialup session, but the line would not stay up long enough for me to look at any data. I'll have to try the line again, and send another PRR when I find the problem. END **************************************************************************** DATA PROBLEM REPORT ASL1996:023 1996/07/16 ASL DCC Tyler Storm ASL LPAZ GT ?H? 1996,197,21:15:00 1996,197,21:45:00 Problem Description OTHER SEED COMMENT REFERENCE C 1840 Calibration data A large sine wave calibration is present during the time frame of the Guerreru, Mexico quake. END PROBLEM RESOLUTION REPORT ASL1996:023 1996/07/16 ASL DCC Tyler Storm Description of Problem Resolution COMMENT The Air Force calibrates the GTSN stations once a week. LPAZ data quality returns to normal at 1996, 197, 21:45. END **************************************************************************** DATA PROBLEM REPORT IDA2008:059 2008/12/29 IDA DCC Erik Klimczak IDA PALK II BHZ-10,BH1-10,BL1-10 1900,000,00:00:00 1900,000,00:00:00 Problem Description Problem Description DEAD CHANNEL The BHZ-10 and B*1-10 channels from the CMG-3T seismometer have drifted out of normal operating range. END **************************************************************************** DATA PROBLEM REPORT ASL1996:022 1996/07/12 ASL DCC Tyler Storm ASL KBS IU ? 1996,158,11:00:00 1996,158,11:00:00 Problem Description OTHER There is a strange disturbance in the KBS data at these times: 1996,158,11 1996,159,07:51 1996,160,15:39 1996,171,06:07 In the horizontal data, I see a very jagged (non-coherent) signal which is approximately 30 times as large as the normal data level. The data is degraded for about two hours. The vertical data look fairly normal during this same time frame, but I see a large pulse beginning where the horizontal anomaly ends, and ending approximately two hours later, in each case. Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT ASL1996:022 1996/07/12 ASL DCC Tyler Storm Description of Problem Resolution COMMENT If have sent the DPR and the .ps file to the station operators to see if they have any ideas about what could be happening. Possibly, they will be able to correlate the signals with something they were doing at the station. END **************************************************************************** DATA PROBLEM REPORT ASL1996:021 1996/07/11 ASL DCC Tyler Storm ASL KIEV IU ? 1996,153,08:52:00 1996,160,08:45:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. Field engineers were on site testing and calibrating during this time frame. END PROBLEM RESOLUTION REPORT ASL1996:021 1996/07/11 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION See DPR. END **************************************************************************** DATA PROBLEM REPORT ASL1996:020 1996/07/11 ASL DCC Tyler Storm ASL COLA IU ? 1996,166,00:00:00 1996,170,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. Field engineers were testing, and calibrating during this time frame. END **************************************************************************** DATA PROBLEM REPORT ASL1996:029 1996/08/23 ASL DCC Tyler Storm ASL SPA IU BHN, LHN, VHN, UHN 1996,161,15:37:00 1996,192,06:30:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. N/S broad-band data are dead. END PROBLEM RESOLUTION REPORT ASL1996:029 1996/08/23 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION N/S mass was re-centered on 1996,192 at 06:30 UTC. END **************************************************************************** DATA PROBLEM REPORT ASL1996:028 1996/08/12 ASL DCC Tyler Storm ASL SFJ IU ?HN, ?HE 1996,081,00:00:00 1996,081,00:00:00 Problem Description NOISE Due to high wind, and the surface vault being fairly close to the coast, the horizontal data are noisy at SFJ. END PROBLEM RESOLUTION REPORT ASL1996:028 1996/08/12 ASL DCC Tyler Storm Description of Problem Resolution COMMENT Unless the station is moved, the data will remain noisy. Possibly, the noise will be less during other seasons. Since SFJ has only been recording since 1996,081, we don't know what the seasonal variations are going to do to the noise level. No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT ASL1996:027 1996/08/12 ASL DCC Tyler Storm ASL ULN IU ?HZ 1996,152,04:53:00 1996,240,08:00:00 Problem Description NOISE The noise level on the vertical channels increased drastically at this time. END PROBLEM RESOLUTION REPORT ASL1996:027 1996/08/27 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION The vertical noise level is back to normal at 08:00 UTC, 27 Aug 96. END **************************************************************************** DATA PROBLEM REPORT ASL1996:026 1996/07/17 ASL DCC Tyler Storm ASL SDV IU ?N? 1996,149,10:00:00 1996,149,10:00:00 Problem Description SPIKES SEED COMMENT REFERENCE C 4520 Channel has occasional spiking. There are large, positive spikes in the N/S broad-band data. Usually, there are around five spikes per day. END PROBLEM RESOLUTION REPORT ASL1996:026 1996/07/17 ASL DCC Tyler Storm Description of Problem Resolution COMMENT The station was down for 45 days. When it came back on line, the spikes were present in the N/S data. At this point, the reason for the disturbance is unknow. PROBLEM RESOLUTION REPORT ASL1996:026 1996/07/17 ASL DCC Tyler Storm Description of Problem Resolution COMMENT The station was down for 45 days. When it came back on line, the spikes were present in the N/S data. At this point, the reason for the disturbance is unknown. SUPPLEMENT The spiking problem on the SDV N/S data disappeared of its own accord at 1997, 317, 07:20. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL1996:025 1996/07/17 ASL DCC Tyler Storm ASL NEE TS ?H? 1996,145,00:00:00 1997,050,02:37:00 Problem Description NOISE There is some very large amplitude noise which occurs at NEE on a daily basis. The noise is present from around 16:00 UTC through 00:00 UTC, the next day. END PROBLEM RESOLUTION REPORT ASL1996:025 1996/07/17 ASL DCC Tyler Storm Description of Problem Resolution COMMENT The noise correlates with normal work hours. It's mostly likely a cycling cooler, or something of that nature. For the full duration of this noise problem, please see HRV1993:071. No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT UW1994:011 1994/07/07 University of Washington Luciana Astiz DMC WFM G VH? 1989,181,00:00:00 1990,180,00:00:00 Problem Description SPIKES Data for the VH? channels contains multitude of spikes in this time period. There is a t least 2 or 3 spikes randomly distributed throughout the day. For many days there are up to I would guess 20-30 spikes/day The problem is specially bad for data recorded between 1989,300 and 1990,170 END **************************************************************************** DATA PROBLEM REPORT UW1994:010 1994/07/07 University of Washington Luciana Astiz DMC RER G MHN 1989,181,00:00:00 1990,180,00:00:00 Problem Description DEAD CHANNEL The data for the MHN channel is flat.... i.e. "dead" for this time period END **************************************************************************** DATA PROBLEM REPORT ASL1996:013 1996/06/12 ASL DCC Tyler Storm ASL AAE IU ? 1996,155,00:00:00 1996,195,00:00:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 400 Station has clock problems. Station timing is unreliable END PROBLEM RESOLUTION REPORT ASL1996:013 1996/06/20 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION Accurate timing was restored on 13 Jul 96. END **************************************************************************** DATA PROBLEM REPORT ASL2005:003 2005/01/13 ASL DCC Valerie Peyton ASL MIDW IU 00/*H* 2004,359,04:42:00 2004,360,14:57:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. All three components of the MIDW STS2 are currently pegged. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2005:003 2005/01/13 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The MIDW STS2 recovered sufficiently good mass positions for the data quality to return to normal quality at 2004, 360, 14:57. END **************************************************************************** DATA PROBLEM REPORT ASL1996:012 1996/06/03 ASL DCC Tyler Storm ASL BJT IC BHZ LHZ UHZ VHZ 1996,122,00:00:00 1996,165,03:00:00 Problem Description OTHER SEED COMMENT REFERENCE C 1850 Sensor has lost vacuum containment. The bell jar containing the vertical instrument at BJT lost vacuum at 00:00 on 1 May 96. The data is still usable after this time, but the noise level is approximately eight times higher than before. END PROBLEM RESOLUTION REPORT ASL1996:012 1996/06/16 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION The problem was fixed at 03:00 UTC, 14 June 96. Vertical noise levels should be back to normal. END **************************************************************************** DATA PROBLEM REPORT ASL2005:004 2005/01/13 ASL DCC Tyler Storm ASL KEV IU 10/?HN, 10/?HE 2004,361,01:41:00 2005,006,12:15:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The horizontal channels from the CMG3-T are dead. END PROBLEM RESOLUTION REPORT ASL2005:004 2006/01/03 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION There is an 11 day gap in KEV data. When the data returns at 2005, 006, 12:15, the data from the CMG3-T horizontals is good again. END **************************************************************************** DATA PROBLEM REPORT ASL1996:011 1996/05/31 ASL DCC Tyler Storm ASL ANMO IU ? 1996,141,19:20:00 1996,145,14:13:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 450 Time Uncertain. Incorrect timing (one minute slow). END PROBLEM RESOLUTION REPORT ASL1996:011 1996/06/21 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION Timing was corrected on 24 May at 14:13 UTC. END **************************************************************************** DATA PROBLEM REPORT ASL2005:001 2005/01/13 ASL DCC Tyler Storm ASL XAN IC 00/?HZ 2004,200,10:00:00 2005,339,07:25:00 Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE C 4815 Channel has long period noise. The bell jar containing the STS-1 vertical seismometer at XAN has lost vacuum. During this time frame the noise levels at the lower frequencies are considerably higher. END **************************************************************************** DATA PROBLEM REPORT ASL1996:010 1996/05/13 ASL DCC Tyler Storm ASL KMI IC BHZ,LHZ,VHZ,UHZ,BHE,LHE,VHE,UHE 1996,118,00:00:00 1996,118,00:00:00 Problem Description POLARITY REVERSED The polarities of the broad-band e/w, and vertical channels (from the STS-1) are reversed. END **************************************************************************** DATA PROBLEM REPORT ASL2005:002 2005/01/13 ASL DCC Valerie Peyton ASL MIDW IU 00/*H* 2005,012,21:44:00 2005,013,15:55:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. All three components of the MIDW STS2 are currently pegged. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2005:002 2005/01/13 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION We were able to remotely recenter the MIDW STS2. Data quality returns to normal at 2005, 013, 15:55. END **************************************************************************** DATA PROBLEM REPORT ASL2005:000 2005/01/04 ASL DCC Valerie Peyton ASL QSPA IU 20/*H* 2004,365,17:29:00 2004,365,17:29:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. All three masses of the QSPA STS2 are currently pegged. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2005:000 2005/01/05 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION We were able to remotely recenter the QSPA STS2. Data quality returns to normal at 2005, 004, 17:27. END **************************************************************************** DATA PROBLEM REPORT UW1994:009 1994/07/07 University of Washington Luciana Astiz DMC RER G VH? 1989,181,00:00:00 1990,180,00:00:00 Problem Description SPIKES Data for the VH? channels contains multitude of spikes in this time period. There is a t least 2 or 3 spikes randomly distributed throughout the day. For many days there are up to I would guess 20-30 spikes/day END **************************************************************************** DATA PROBLEM REPORT ASL1996:019 1996/07/11 ASL DCC Tyler Storm ASL COLA IU ? 1996,169,13:20:00 1996,169,16:31:00 Problem Description DEAD CHANNEL Dead channels. END PROBLEM RESOLUTION REPORT ASL1996:019 1996/07/11 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION The channels came back up at 16:31 UTC on 17 June. The field engineers who installed the station were still on site at this time, and the outage was most likely due to testing. No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT ASL2005:009 2005/01/28 ASL DCC Tyler Storm ASL SBA IU 00/* 2005,027,19:55:00 2005,028,08:05:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. All channels from the CMG3-t are dead during this time frame. END PROBLEM RESOLUTION REPORT ASL2005:009 2005/01/28 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION Data are back to normal at 2005,028,08:05:00. END **************************************************************************** DATA PROBLEM REPORT ASL1996:018 1996/07/11 ASL DCC Tyler Storm ASL ENH CD BHZ, LHZ, VHZ 1996,158,05:17:04 1996,158,06:31:21 Problem Description OTHER There is a large, "clipped" pulse on the vertical channels. Looking at some previous data, I see the station operator had been performing some sort of calibration every three days. This pulse falls into the three day pattern. I would guess there was some sort of equipment failure, or operator error associated with the scheduled calibration. I have seen this same sort of pulse on all of the old CDSN stations. END PROBLEM RESOLUTION REPORT ASL1996:018 1996/07/11 ASL DCC Tyler Storm Description of Problem Resolution COMMENT None needed; see DPR. END **************************************************************************** DATA PROBLEM REPORT ASL1996:017 1996/07/03 ASL DCC Tyler Storm ASL HRV IU ? 1996,150,00:00:00 1996,243,01:15:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 451 Timing MAY be in error, as clock is unlocked. Timing is off +/- 10 seconds. The data was originally time-tagged with a bogus date of 1984. With help from a note from the HRV station personnel, we were able to move the time stamps within several minutes of being correct. Through further event analysis, we tweeked the error down to several seconds. END PROBLEM RESOLUTION REPORT ASL1996:017 1996/07/03 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION None needed. See DPR ASL96:017. END **************************************************************************** DATA PROBLEM REPORT UW1994:006 1994/07/07 University of Washington Luciana Astiz DMC AGD G VH? 1989,181,00:00:00 1990,180,00:00:00 Problem Description SPIKES Data for the VH? channels contains multitude of spikes in this time period. There is a t least 2 or 3 spikes randomly distributed throughout the day. For many days there are up to I would guess 20-30 spikes/day END **************************************************************************** DATA PROBLEM REPORT ASL2005:007 2005/01/21 ASL DCC Valerie Peyton ASL LVC IU 10/*HE 2005,020,22:19:00 2005,021,15:49:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The E component of the CMG3T at LVC has fallen against one of its stops. This was caused by the onset of a local earthquake. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2005:007 2005/01/31 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION A remote recenter from ASL fixed the problem with the E component of the LVC CMG3T. Data quality returns to normal at 2005, 021, 15:49. END **************************************************************************** DATA PROBLEM REPORT ASL1996:016 1996/07/02 ASL DCC Tyler Storm SPYDER GRFO IU LHZ, LHN, LHE 1996,182,11:42:00 1996,182,11:42:00 Problem Description OTHER The GRFO LH data which SPYDER collected for this event looks strange. One trace is almost dead, another looks like unrelated data, and they are all misnamed. END PROBLEM RESOLUTION REPORT ASL1996:016 1996/07/02 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION The data logger selection script had been changed, so SPYDER could not collect the correct channels. The personnel operating GRFO have fixed the problem. SUPPLEMENT The SPYDER data holdings have been corrected, and the GRFO data available for this event is now correct. END **************************************************************************** DATA PROBLEM REPORT UW1994:005 1994/03/10 University of Washington Luciana Astiz DMC TSK PS ??? 1990,001,00:00:00 1990,031,00:00:00 Problem Description INVALID RESPONSE In the response file for TSK the frequency for the sensitivity may not be given or listed as 0 Hz, it should read 1 Hz for it to be correct. END **************************************************************************** DATA PROBLEM REPORT ASL2005:008 2005/01/24 ASL DCC Valerie Peyton ASL QSPA IU 20/*H* 2005,023,13:52:00 2005,026,18:24:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. All three components of the STS2 at QSPA have fallen against their stops. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2005:008 2005/01/27 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION A remote recenter of the QSPA STS2 solved the problem. Data quality returns to normal at 2005, 026, 18:24. END **************************************************************************** DATA PROBLEM REPORT ASL1996:015 1996/06/26 ASL DCC Tyler Storm ASL BOCO IU ?HZ 1996,001,00:00:00 1996,235,00:00:00 Problem Description NOISE SEED COMMENT REFERENCE C 4502 Channel has intermittant high frequency noise. The vertical data at BOCO is noisy, off and on, all year. The noise is fairly high-frequency, and usually last for several days. After the noise disappears, the data remains quiet for several days, and then the noise comes back. Although the noise characteristics of the horizontal data do not change during these time frames, I do notice a data "glitch" on the horizontal data which corresponds to the times when the vertical noise increases and decreases. Postscript file was placed into/pub/qc/qc_ps END PROBLEM RESOLUTION REPORT ASL1996:015 2000/08/22 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Station BOCO was shut down effective 1996,235 as the political situation in Bogota made it unsafe for anyone to visit the station. In summer 2000, the situation had improved sufficiently for the former station operator to return to the inoperative station and retrieve the seismometer. More cannot be done at this point. END **************************************************************************** DATA PROBLEM REPORT UW1994:008 1994/07/07 University of Washington Luciana Astiz DMC KIP IU VH? LH? 1989,181,00:00:00 1990,180,00:00:00 1990,180,00:00:00 Problem Description SPIKES Data for the VH? and LH? channels contains multitude of spikes during this time period. There are at least 5 to 15 spikes randomly distributed. For many days there are up to 30 spikes/day or more. END PROBLEM RESOLUTION REPORT UW1994:008 2006/01/02 ASL Valerie Peyton Description of Problem Resolution COMMENT The KIP STS1 instruments do indeed display occasional spikes during this time frame. The frequency indicated in the Data Problem Report appears to only have occurred for a few days at random times. This type of spiking is not at all unusual, and seems intractable. No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT ASL2005:005 2005/01/17 ASL DCC Valerie Peyton ASL GNI IU */* 2003,360,11:22:00 2004,038,09:38:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 452 Timing IS in error, as clock is unlocked. The GNI GPS system is not locked on to the GPS satellite signal. Timing in the data should be considered incorrect. END PROBLEM RESOLUTION REPORT ASL2005:005 2005/01/17 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The GNI GPS system returns to normal operation at 2004, 038, 09:38. Timing quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL1996:014 1996/06/26 ASL DCC Tyler Storm ASL BOCO IU ? 1996,123,00:00:00 1996,235,00:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE S 15 Station has power problems & consequent data outages. Starting around the first of May, the BOCO data has many outages. The outages usually occur once a day, and last for several hours. END PROBLEM RESOLUTION REPORT ASL1996:014 1996/06/26 ASL DCC Tyler Storm Description of Problem Resolution COMMENT The field engineers believe the solar panels are not soaking up enough rays during the day to keep the repeater (between the data acquisition, and data processing systems) operating through the night. This is possible, but I wouldn't be surprised if there is some sort of problem with how the entire solar panel/changing system is working. We are in the process of investigating the problem. 2000/235 : Station BOCO was shut down effective 1996,235 as the political situation in Bogota made it unsafe for anyone to visit the station. END **************************************************************************** DATA PROBLEM REPORT ASL2005:006 2005/01/20 ASL DCC Tyler Storm ASL FURI IU 10/?HE 2004,361,01:37:00 2005,021,08:18:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. E/W channels from the CMG3-T are dead. END PROBLEM RESOLUTION REPORT ASL2005:006 2006/07/03 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The FURI CMG3-T was recentered, fixing the problem with the E/W channels. Data quality returns to normal at 2005, 021, 08:18. END **************************************************************************** DATA PROBLEM REPORT UW1994:002 1994/03/10 University of Washington Luciana Astiz DMC AQU MN [VLB]HZ 1991,001,00:00:00 1991,365,00:00:00 Problem Description OTHER The gain at AQU reported in the data-base for this station is not correct. END PROBLEM RESOLUTION REPORT UW1994:002 1900/01/01 Description of Problem Resolution sensitivity should be: BHZ 5.25 e+09 before day 212/1991 BHZ 1.0542e+09 after day 212/1991 VHZ 8.4 e+10 before day 212/1991 VHZ 1.68672e+10 after day 212/1991 Information for LHZ is not available at this time. (3/14/94) END **************************************************************************** DATA PROBLEM REPORT UW1994:001 1994/01/19 University of Washington Creager/Benson Gopher IDA II ??? 1900,000,00:00:00 1900,000,00:00:00 Problem Description OTHER It appears that IDA stations have lat and lon of 0.0,0.0 in the SAC headers in gopher data. Probably not noticed before now because the distance and azimuth between station and event has been put into the SAC file locally at the UW. END PROBLEM RESOLUTION REPORT UW1994:001 1994/01/25 IDA Peter Davis Description of Problem Resolution Resolution The NRTS software responsible for forming the SAC headers was not reading the station information database properly. The version installed on all IDA gopher stations on 1994023 now functions as expected. Beginning with the 27th event for this quarter, the station coordinates should appear in the SAC header of IDA gopher data. We regret any inconvenience this may have caused. END **************************************************************************** DATA PROBLEM REPORT UW1994:004 1994/03/10 University of Washington Luciana Astiz DMC GNI IU VHZ 1991,001,00:00:00 1991,365,00:00:00 Problem Description OTHER From the results of the Noise study, the VHZ channel was very high in comparison to the horizontal channels. END PROBLEM RESOLUTION REPORT UW1994:004 1994/03/16 IU Bob Woodward Description of Problem Resolution COMMENT The gain had been misreported, instead of e+08 should read e+09. REFERRED ASL 94/03/14 END **************************************************************************** DATA PROBLEM REPORT UW1994:003 1994/03/10 University of Washington Luciana Astiz DMC MDT MN ?HZ ?HE 1990,159,14:47:00 1990,243,09:32:00 1990,243,09:32:00 Problem Description CHANNEL ORIENTATION SEED COMMENT REFERENCE C 4331 Vertical and east-west inputs swapped (ie Z <=> E). From the results of the Noise study, the VHZ channel was very high in comparison to the VHE channel. Perhaps these two channels have been switched? END PROBLEM RESOLUTION REPORT UW1994:003 2007/01/19 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Looking at the small portion of MN/MDT archived here at ASL, it is indeed the case that the Z and E data streams are misnamed: The Z data stream contains E data, and the E data stream contains Z data. We can only speak to the time period for which we have MN/MDT data (1990, 159, 14:47 to 1990, 243, 09:32), but we can indeed say that this channel mis-naming is present for the duration. The DMC has data for MN/MDT starting at the same time as our archive, and ending at 1998, 077, 04:47. We cannot be sure for how much of the station's operating life these channels were misnamed, so we advise users to check the MN/MDT data carefully before using it. END **************************************************************************** DATA PROBLEM REPORT ASL1996:002 1996/01/09 ASL DCC Tyler Storm ASL BILL IU ? 1995,234,00:00:00 1995,241,00:00:00 Problem Description OTHER Calibrations are present during this time frame. No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT ASL2005:014 2005/02/01 ASL DCC Valerie Peyton ASL RAR IU 10/*H* 2005,030,15:44:00 2005,033,01:18:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. All three channels of the CMG at RAR died simultaneously. It looks like some kind of electrical impulse caused the problem. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2005:014 2005/02/02 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The RAR station operator replaced a fuse in the CMG handheld control unit. This restored power to the instrument. Data quality returns to normal at 2005, 033, 01:18. END **************************************************************************** DATA PROBLEM REPORT ASL1996:001 1996/01/09 ASL DCC Tyler Storm ASL DAV IU ?H* 00/*H* 1994,352,00:00:00 1994,352,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE C 4510 Channel has frequent spiking. DAV data contains a considerable amount of spiking; E/W and vertical data are by far the worst. END PROBLEM RESOLUTION REPORT ASL1996:001 1996/06/21 ASL DCC Tyler Storm Description of Problem Resolution COMMENT The data still contains a lot of spikes. Our field engineers think the problem might be linked to moisture in the electronic feedback boxes, and possibly some connections. The next time a team visits the station they will try replacing some the suspect connections and putting dessicant in the electronic feedback box enclosures. SUPPLEMENT The spiking observed on DAV data appears to have two causes: high levels of cultural noise, and recurring moisture problems with the instruments. The frequency of spiking varies from time to time, but in general one should expect DAV data to contain frequent spikes. We will address instrument problems as possible, but the background noise will continue to produce spiking unless the station is moved. END **************************************************************************** DATA PROBLEM REPORT ASL2005:015 2005/02/02 ASL DCC Valerie Peyton ASL GUMO IU 10/*HE 2005,033,02:31:00 2005,033,03:02:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The CMG3T E component at GUMO was pegged by a local event. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2005:015 2005/02/02 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The GUMO station operator recentered the CMG3T E. Data quality returns to normal at 2005, 033, 03:02. END **************************************************************************** DATA PROBLEM REPORT ASL2005:012 2005/01/31 ASL DCC Valerie Peyton ASL SBA IU 00/*H* 2005,028,19:04:00 2005,029,04:30:00 Problem Description OTHER SEED COMMENT REFERENCE C 4531 Seismometer mass is intermittantly against stops. Scott Base is doing minor repair work that involves heavy machinery. In order to prevent damage to the SBA sensor, the station operator locks up the CMG. Expect random locking and unlocking episodes, as well as variable data quality during this time. END PROBLEM RESOLUTION REPORT ASL2005:012 2005/01/31 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The Scott Base repair work was temporarily finished at 2005, 029, 04:30. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2005:013 2005/01/31 ASL DCC Valerie Peyton ASL BILL IU 00/*HE 2005,015,21:38:00 2005,029,22:20:00 Problem Description NOISE SEED COMMENT REFERENCE C 4509 Channel has elevated low frequency noise levels. The E component of the STS1 at BILL is experiencing high levels of spiking and low frequency noise. Data quality is compromised. END PROBLEM RESOLUTION REPORT ASL2005:013 2005/01/31 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The E component of the STS1 BILL resumed normal noise levels at 2005, 029, 22:20. END **************************************************************************** DATA PROBLEM REPORT ASL2005:010 2005/01/28 ASL DCC Tyler Storm ASL RCBR IU 10/*H* 2004,203,14:12:00 2004,203,14:12:00 Problem Description NOISE SEED COMMENT REFERENCE C 4503 Channel has intermittant low frequency noise. The STS2 at RCBR experiences daily episodes of long period noise. This noise is especially severe on the horizontals, but affects the vertical as well. Episodes last 11 to 13 hours, and happen every 11 to 13 hours. They are caused by the air conditioner at the station. The STS2 vault receives power through a plastic conduit which comes from the station house. In order for the station house to maintain a proper temperature for the digitizer, an air conditioner must run during the day. This air conditioner vibrates intensely, and the vibration is communicated to the STS2 vault via the power conduit. Thus this low frequency noise is an unfortunate consequence of the operating temperature of the digitizer's electronics. The problem starts at installation, as it is a function of the installation conditions. END PROBLEM RESOLUTION REPORT ASL2005:010 2005/01/28 ASL DCC Tyler Storm Description of Problem Resolution COMMENT This daily noise problem will persist as long as power to the RCBR STS2 continues to be supplied through conduit connected to the main station structure END **************************************************************************** DATA PROBLEM REPORT ASL2005:011 2005/01/28 ASL DCC Tyler Storm ASL BILL IU 00/*HZ 2005,027,20:41:00 2005,029,22:19:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The Z component of the STS1 at BILL has fallen against one of its stops. Data can be used with caution until 2005,028,05:34:00. After this time, data are not useable at all. END PROBLEM RESOLUTION REPORT ASL2005:011 2005/01/31 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The BILL station operator recentered the STS1 Z at 2005, 029, 22:19. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL1996:009 1996/05/13 ASL DCC Tyler Storm ASL KONO IU ?HZ, ?HN 1996,126,22:13:00 1996,129,08:00:00 Problem Description DEAD CHANNEL Dead channel. END PROBLEM RESOLUTION REPORT ASL1996:009 1996/05/13 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION The channels came back after the system was reset. Apparently, the digitizer had deleted the channels when it encountered a certain amount of errors. END **************************************************************************** DATA PROBLEM REPORT ASL1996:008 1996/05/13 ASL DCC Tyler Storm ASL ANTO IU *HE 1996,039,07:38:00 1996,067,12:48:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The e/w channels are dead. END PROBLEM RESOLUTION REPORT ASL1996:008 1996/04/17 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION The e/w data is back on line at 10 UTC, 14 Apr 96. END **************************************************************************** DATA PROBLEM REPORT ASL1996:007 1996/05/13 ASL DCC Tyler Storm ASL SPA IU ?HN 1996,092,10:00:00 1996,122,08:35:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The north/south channels are dead at SPA due to the mass being "pegged". END **************************************************************************** DATA PROBLEM REPORT ASL1996:006 1996/03/14 ASL DCC Tyler Storm ASL KONO IU ?HN 1996,075,04:37:00 1996,075,04:37:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The n/s data at KONO started to "flatline" at 04:37 UTC 15 Mar 96. END PROBLEM RESOLUTION REPORT ASL1996:006 1996/04/01 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION The n/s data is back on line as of 12:37 UTC 1 Apr 96. END **************************************************************************** DATA PROBLEM REPORT ASL2005:018 2005/02/04 ASL DCC Valerie Peyton ASL SFJ IU */* 2005,028,00:00:00 2005,042,18:35:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. An ASL field team is on site at SFJ for station reinstallation (the sensors are being moved to a new vault), maintenance, and upgrade. Expect variable data quality and availability, as well as tests, calibrations, and other anomalies. END PROBLEM RESOLUTION REPORT ASL2005:018 2005/02/14 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The ASL field team left SFJ in excellent working condition at 2005, 042, 18:35. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL1996:005 1996/03/14 ASL DCC Tyler Storm ASL SPA IU ?HN 1996,042,16:25:00 1996,074,12:15:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The N/S data at SPA has been dead since 9 Feb 96, when the mass "pegged" against the stop. END PROBLEM RESOLUTION REPORT ASL1996:005 1996/03/14 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION The mass was re-centered at 11:49 UTC on 14 Mar 96. Data quality returns to normal roughly half an hour after the recentering. END **************************************************************************** DATA PROBLEM REPORT ASL2005:019 2005/02/07 ASL DCC Valerie Peyton ASL GUMO IU 10/*HE 10/*HN 2005,036,03:35:00 2005,036,04:18:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. Both horizontal components of the GUMO CMG3T fell against their stops when a close-in event arrived. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2005:019 2005/02/07 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The GUMO station operator recentered the CMG3T. Data quality retunrs to normal at 2005, 036, 04:18. END **************************************************************************** DATA PROBLEM REPORT ASL1996:004 1996/02/12 ASL DCC Tyler Storm ASL SSPA IU ? 1995,334,00:00:00 1996,032,10:00:00 Problem Description INCORRECT TIME The data at SSPA was time tagged incorrectly from 30 Nov 95 through 1 Feb 1996 16:00 UTC. During this time the system was running on "internal time" which was about ten seconds off. END **************************************************************************** DATA PROBLEM REPORT ASL2005:016 2005/02/02 ASL DCC Valerie Peyton ASL QSPA IU 00/LDO 2003,359,20:45:00 2006,018,06:28:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The QSPA microbarograph was disconnected for maintenance reasons. It appears that when it was reconnected, something in the connector wasn't working. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2005:016 2006/01/19 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The broken QSPA NovaLynx Model 230-700 (BP01) high-altitude microbarograph was replaced with a working Paroscientific microbarograph. Data quality returns to normal at 2006, 018, 06:28. END **************************************************************************** DATA PROBLEM REPORT ASL1996:003 1996/01/09 ASL DCC Tyler Storm ASL RAR IU ? 1996,001,00:00:00 1996,015,18:55:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 455 Data does not contain leap second. The timing at RAR has been off by one second since 1996, 001, 00:00 (the clock was not adjusted for the leap second). END PROBLEM RESOLUTION REPORT ASL1996:003 1996/01/16 ASL Tyler Storm Description of Problem Resolution Resolution The leap second was put in on 15 Jan 96 at 18:54:02 UTC. END **************************************************************************** DATA PROBLEM REPORT ASL2005:017 2005/02/03 ASL DCC Valerie Peyton ASL KMBO IU 00/LDO 2003,221,09:20:00 2006,210,08:51:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4625 Invalid instrument response. The ParoScientific microbarograph at KMBO developed a sensitivity problem starting at 2003, 221, 09:20. Starting at this time, the instrument appears to have gradually lost 10% of its originaly sensitivity. The full 10% appears to be lost by ~2004, 114, 13:00. After this time, the instrument remains steady with its "new" sensitivity. Since we cannot determine the precise drop in sensitivity, we will not be modifying the 00/LDO response information in the KMBO dataless. We will replace the instrument at the earliest opportunity. END PROBLEM RESOLUTION REPORT ASL2005:017 2006/08/09 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The ParoScientific microbarograph at KMBO was fixed. Data quality returns to normal at 2006, 210, 08:51. END **************************************************************************** DATA PROBLEM REPORT DMCQC2016:0220 2016/01/12 IRIS DMC Gillian Sharer DMC 143B N4 * 2015,289,17:55:00 2015,295,18:17:00 Problem Description OTHER Starting on 2015.289 17:55 UTC, N4.143B became unstable, with its dc offsets trending downwards with day-long periodicity to millions of counts. This pattern rotated onto the V-element and the VM2 channel also mirrored this. END PROBLEM RESOLUTION REPORT DMCQC2016:0220 2016/01/12 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION N4.143B returned to normal operation after a mass recenter on 2015.295 18:17 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2016:0221 2016/01/12 IRIS DMC Gillian Sharer DMC 143B N4 * 2015,308,08:12:00 2015,308,21:31:00 Problem Description OTHER Starting on 2015.308 08:12 UTC, N4.143B became unstable, with its dc offsets trending to hundreds of thousands of counts. This pattern rotated onto the V-element and the VM2 channel also mirrored this. END PROBLEM RESOLUTION REPORT DMCQC2016:0221 2016/01/12 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION N4.143B returned to normal operation after a mass recenter on 2015.308 21:31 UTC. END **************************************************************************** DATA PROBLEM REPORT ASL2005:040 2005/03/14 ASL DCC Tyler Storm ASL OTAV IU 10/?HE 2005,070,17:38:00 2005,073,15:08:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The Channels from the E/W component of the CMG3-T at OTAV are dead. END PROBLEM RESOLUTION REPORT ASL2005:040 2005/03/16 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION A remote recenter of the OTAV CMG3-T solved the problem with the E/W component. Data quality returns to normal at 2005, 073, 15:08. END **************************************************************************** DATA PROBLEM REPORT ASL2005:047 2005/04/07 ASL DCC Tyler Storm ASL ULN IU 00/?HZ 2005,042,23:26:00 2005,042,23:26:00 Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE C 1850 Sensor has lost vacuum containment. The bell jar containing the vertical STS-1 seismometer has lost vacuum. Data contain significant low-frequency noise. END PROBLEM RESOLUTION REPORT ASL2005:047 2005/04/14 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The ULN station operator evacuated the STS1 Z bell jar, fixing the low-frequency noise problem. Data quality returns to normal at 2005, 102, 04:20. END **************************************************************************** DATA PROBLEM REPORT ASL2005:048 2005/04/11 ASL DCC Valerie Peyton ASL QSPA IU 20/*H* 2005,102,18:24:00 2005,102,18:24:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. All three components of the QSPA STS2 are pegged. Data are unuseable. END **************************************************************************** DATA PROBLEM REPORT ASL2005:045 2005/03/29 ASL DCC Valerie Peyton ASL BILL IU 00/*HZ 2005,088,11:53:00 2005,089,21:31:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The Z component of the STS1 at BILL has fallen against its stop. Only extremely large events are visible, and the instrument response may be incorrect. END PROBLEM RESOLUTION REPORT ASL2005:045 2005/04/21 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The BILL station operator recentered the STS1 Z. Data returns to normal at 2005, 089, 21:31. END **************************************************************************** DATA PROBLEM REPORT ASL2005:046 2005/04/05 ASL DCC Valerie Peyton ASL HKT IU */* 2005,095,00:00:00 2006,013,00:01:00 Problem Description OTHER SEED COMMENT REFERENCE S 10 Station is down. HKT is in danger of being flooded by a leaking pipe. The station will be closed down and moved to high ground for the duration of the repairs. END PROBLEM RESOLUTION REPORT ASL2005:046 2006/01/24 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION HKT was restored to proper operational order at 2006, 013, 00:01. A full complement of data is not available until 2006, 020, 18:14. END **************************************************************************** DATA PROBLEM REPORT ASL2005:043 2005/03/28 ASL DCC Valerie Peyton ASL SNZO IU 00/*H1 00/*H2 2004,350,02:07:00 2004,350,02:07:00 Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE C 4509 Channel has elevated low frequency noise levels. The horizontal components of the SNZO 54000 have excessive long-period noise. Noise levels are 10 to 40dB higher than they should be. END PROBLEM RESOLUTION REPORT ASL2005:043 2005/05/11 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION Noise levels are back to normal at 2005,089,23:50:00. END **************************************************************************** DATA PROBLEM REPORT ASL2005:044 2005/03/29 ASL DCC Valerie Peyton ASL QSPA IU 20/*H* 2005,085,11:52:00 2005,088,14:22:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. All three components of the STS2 at QSPA have fallen against their stops. Only extremely large events are visible, and response is affected. END PROBLEM RESOLUTION REPORT ASL2005:044 2005/03/29 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION A remote recenter of the QSPA STS2 brought all three masses back to their proper positions. Data quality returns to normal at 2005, 088, 14:22. END **************************************************************************** DATA PROBLEM REPORT ASL2005:041 2005/03/17 ASL DCC Valerie Peyton ASL QSPA IU 20/*H* 2005,066,02:38:00 2005,066,03:26:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The QSPA station operator was relevelling the STS2 and preparing it for the long winter ahead. Data are not useable during this time. END PROBLEM RESOLUTION REPORT ASL2005:041 2005/03/17 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The QSPA station operator stopped working on the STS2 at 2005, 066, 03:26. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2005:042 2005/03/23 ASL DCC Valerie Peyton ASL RSSD IU */* 2005,082,00:00:00 2005,087,17:20:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. An ASL field team is on site at RSSD performing station maintenance. Expect variable data quality and availability, as well as tests, calibrations, and other anomalies. END PROBLEM RESOLUTION REPORT ASL2005:042 2005/04/01 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION RSSD maintenance work finished at 2005, 087, 17:20. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2005:049 2005/04/14 ASL DCC Valerie Peyton ASL WCI IU */* 2005,046,19:00:00 2005,046,19:24:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 454 Timing MAY be in error, as GPS system is not operating consistently. The WCI system was reset, and timing errors were introduced at the beginning of data acquisition. Timing quality is probably incorrect for this time. END PROBLEM RESOLUTION REPORT ASL2005:049 2005/04/14 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Timing quality at WCI returns to normal at 2005, 046, 19:24. END **************************************************************************** DATA PROBLEM REPORT ASL2005:050 2005/04/15 ASL DCC Valerie Peyton ASL QSPA IU 00/* 20/* 40/* 2005,060,00:19:00 2005,066,02:50:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE C 4210 Time uncertain. The QSP1 DA at QSPA has a timing problem during this time. Timing quality should be considered suspect for location codes 00, 20, and 40. Data streams from the 54000, STS2 and GS13 instruments should be considered to potentially have incorrect timing. END PROBLEM RESOLUTION REPORT ASL2005:050 2005/04/15 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The timing problem on the QSP1 DA at QSPA was caused by tickerror problems on the digitizers. The problem was resolved by resetting the DA. Timing quality returns to normal at 2005, 066, 02:50. END **************************************************************************** DATA PROBLEM REPORT ASL2005:051 2005/04/18 ASL DCC Valerie Peyton ASL HIA IC */* 2005,075,04:31:00 2005,091,06:11:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 450 Time Uncertain. HIA timing should be considered suspect. The digitizer is returning error message that indicate timing is not synchronized across all channels. It is possible that timing quality will vary from channel to channel during this time period. END PROBLEM RESOLUTION REPORT ASL2005:051 2005/04/18 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION HIA timing returned to normal at 2005, 091, 06:11. END **************************************************************************** DATA PROBLEM REPORT ASL2005:058 2005/04/27 ASL DCC Valerie Peyton ASL BILL IU 00/*HZ 2005,117,05:38:00 2005,117,17:20:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The Z component of the STS1 at BILL appears to be pegged during this time frame. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2005:058 2005/04/27 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The Z component of the BILL STS1 appears to have recovered its mass position by itself. Data quality returns to normal at 2005, 117, 17:20. END **************************************************************************** DATA PROBLEM REPORT ASL2005:059 2005/04/27 ASL DCC Valerie Peyton ASL SDV IU */* 2005,043,06:13:00 2005,043,19:25:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 454 Timing MAY be in error, as GPS system is not operating consistently. The GPS system at SDV was not able to obtain a solid lock on the GPS satellites during this time. This caused the GPS system to not operate consistently, and produced 27 jumps in timing. Data should be used with caution. END PROBLEM RESOLUTION REPORT ASL2005:059 2005/04/27 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The SDV GPS system obtained a solid lock on the satellite signal at 2005, 043, 19:25. Timing quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2005:056 2005/04/22 ASL DCC Valerie Peyton ASL RSSD IU 10/*H* 2005,099,02:00:00 2005,121,16:40:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The STS2 host box at RSSD appears to have blown a fuse. Only digitizer noise is currently being recorded from the instrument, making the data unuseable. A replacement host box has been shipped. END PROBLEM RESOLUTION REPORT ASL2005:056 2005/06/07 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The RSSD station operator installed a new STS2 host box, thus fixing the problem. Data quality returns to normal at 2005, 121, 16:40. END **************************************************************************** DATA PROBLEM REPORT ASL2005:057 2005/04/25 ASL DCC Valerie Peyton ASL AFI IU 00/*HZ 2005,056,15:46:00 2005,056,15:46:00 Problem Description NOISE SEED COMMENT REFERENCE C 4504 Channel exibits high levels of low frequency noise. The Z component of the STS1 at AFI is displaying increasing long-period noise. The source of the noise is being investigated. At times the noise levels decrease, but the overall background noise level has been raised at least 10 - 20 dB below 0.04 Hz. END **************************************************************************** DATA PROBLEM REPORT ASL2005:054 2005/04/21 ASL DCC Valerie Peyton ASL KBS IU 00/*HN 00/*HE 2005,110,13:19:00 2005,115,17:33:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The N and E components of the STS1 at KBS have their masses pegged. The station operator will recenter them as soon as possible. END PROBLEM RESOLUTION REPORT ASL2005:054 2005/04/25 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The KBS station operator recentered the N and E STS1. Data quality returns to normal at 2005, 115, 17:33. END **************************************************************************** DATA PROBLEM REPORT ASL2005:055 2005/04/22 ASL DCC Valerie Peyton ASL GUMO IU 10/*HE 2005,111,21:32:00 2005,111,22:09:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The E component of the GUMO CMG3-T fell against one of its stops. This was precipitated by the arrival of a local event. END PROBLEM RESOLUTION REPORT ASL2005:055 2005/04/22 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The GUMO station operator, sensitive to the fact that the CMG3-T under his care is particularly squirrely during local events, recentered the seismometer swiftly after feeling the event himself. Data quality returns to normal at 2005, 111, 22:09. END **************************************************************************** DATA PROBLEM REPORT ASL2005:052 2005/04/18 ASL DCC Valerie Peyton ASL GUMO IU 00/*HZ 2004,330,18:00:00 2004,330,18:00:00 Problem Description NOISE SEED COMMENT REFERENCE C 4504 Channel exibits high levels of low frequency noise. The Z component of the 54000 at GUMO has developed a severe long-period noise problem. Noise levels can reach 30dB or greater above what they should be. The noise problem dominates from 0.02Hz down through all the lower frequencies. END **************************************************************************** DATA PROBLEM REPORT DMC2006:001 2006/03/17 IRIS DMC Rick Benson DMC TX06 XM ?N,?E 1999,303,18:39:00 2001,070,10:07:00 Problem Description POLARITY REVERSED The horizontals were recording reversed polarities during the entire RISTRA experiment deployment in 1999-2001. END PROBLEM RESOLUTION REPORT DMC2006:001 2006/03/17 IRIS DMC Rick Benson Description of Problem Resolution receiving work from David Wilson. If you are ONLY using miniSEED, you could see this reversal, since the "fix" is in the station metadata, blockette 52, fields 14,15. END **************************************************************************** DATA PROBLEM REPORT ASL2005:053 2005/04/19 ASL DCC Valerie Peyton ASL GNI IU */* 2005,104,09:42:00 2005,131,07:20:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 454 Timing MAY be in error, as GPS system is not operating consistently. The GNI timing system is not operating consistently, and timing is currently ambiguously incorrect. The system is reporting tick errors, which indicate that the timing in the digitizer channels cannot be synchronized. Timing may be correct on some channels, while incorrect on others. Since it is impossible to determine which channels have incorrect timing, all channels are considered to be mistimed. END PROBLEM RESOLUTION REPORT ASL2005:053 2005/05/16 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The GNI timing system recovered and timing quality returned to normal at 2005, 131, 07:20. END **************************************************************************** DATA PROBLEM REPORT ASL2005:025 2005/02/10 ASL DCC Valerie Peyton ASL SNZO IU */* 2004,348,00:00:00 2005,103,20:28:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 454 Timing MAY be in error, as GPS system is not operating consistently. The GPS system at SNZO is not operating correctly, and timing in the data is ambiguously incorrect. It appears that the clock is drifting so quickly as to introduce data gaps of 0.5 - 1 sample width. This occurs roughly daily for the 1sps and lower-sample-rate data and roughly every 48 - 90 minutes for the 20sps and higher-sample-rate data. However, the GPS system is reporting a decent clock lock, making it difficult to determine how big a timing problem may or may not be present. Data should be used with caution. END PROBLEM RESOLUTION REPORT ASL2005:025 2005/04/13 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The SNZO clock problems were resolved at 2005, 103, 20:28. Timing quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2005:026 2005/02/14 ASL DCC Valerie Peyton ASL QSPA IU 40/HHZ 2004,020,06:00:00 2004,020,06:00:00 Problem Description OTHER SEED COMMENT REFERENCE C 4502 Channel has intermittant high frequency noise. There is a project at the South Pole called Enon that broadcasts 4 times an hour and swamps the entire area with RF. The Enon signal is broadcast at 6, 21, 36, and 51 minutes after every hour in one-minute bursts. Enon is a 7 kilometer long dipole oriented North/South running at 19.4 khz, and ~800 watts. Within the one-minute interval of each Enon broadcast, the QSPA GS13 shows DC offsets (one at the beginning of the broadcast and one at the end), as well as small pulses every second. The interference is most visible with a 2 Hz high pass filter, and when there is no tractor noise. END PROBLEM RESOLUTION REPORT ASL2005:026 2005/02/14 ASL DCC Valerie Peyton Description of Problem Resolution COMMENT The Enon broadcast interference will be present on the QSPA GS13 data as long as this instrument continues to operate without a shielded cable. Since removal and re-installation of seismometers at QSPA is such a gargantuan task, this interference will likely be present for the operational lifetime of the instrument. END **************************************************************************** DATA PROBLEM REPORT ASL2005:023 2005/02/10 ASL DCC Valerie Peyton ASL QSPA IU 20/*H* 2005,040,21:03:00 2005,041,17:59:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. All three components of the of the STS2 at QSPA have fallen against their stops. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2005:023 2005/02/11 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION We were able to remotely recenter the QSPA STS2. Data quality returns to normal at 2005, 041, 17:59. END **************************************************************************** DATA PROBLEM REPORT ASL2005:024 2005/02/10 ASL DCC Valerie Peyton ASL SNZO IU 10/*HN 10/*HE 2004,358,15:04:00 2005,020,22:12:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. A close-in event caused the horizontal components of the CMG3T at SNZO to fall against their stops. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2005:024 2005/02/10 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The SNZO CMG3T horizontal masses returned to center at 2005, 020, 22:12. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2005:021 2005/02/08 ASL DCC Valerie Peyton ASL KONO IU 00/*H* 2005,038,14:05:00 2005,054,09:44:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. All three of the STS1 components are dead. The entire station was down for two days, and when the station returned to life, the STS1s did not. The cause of the problem is unknown, but data are not useable. END PROBLEM RESOLUTION REPORT ASL2005:021 2005/02/25 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION An ASL field team doing maintenance work at KONO repaired the dead STS1s. The problem was a blown tranzorb in the DMA1 box. Data quality returns to normal at 2005, 054, 09:44. END **************************************************************************** DATA PROBLEM REPORT ASL2005:022 2005/02/10 ASL DCC Valerie Peyton ASL INCN IU 00/*HZ 2005,041,05:11:00 2005,047,03:06:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The Z component of the STS1 at INCN has fallen against one of its stops. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2005:022 2005/02/16 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The INCN station operator recentered the STS1 Z at 2005, 047, 03:06. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2005:020 2005/02/07 ASL DCC Valerie Peyton ASL BJT IC */* 2005,037,02:26:00 2005,039,07:26:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. The BJT station operator was in the vault for station maintenance. Expect variable data quality as well as calibrations and tests. END PROBLEM RESOLUTION REPORT ASL2005:020 2005/02/07 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION BJT station maintenance finished at 2005, 039, 07:26. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2005:029 2005/02/18 ASL DCC Valerie Peyton ASL BILL IU */* 2004,246,06:32:00 2004,251,12:41:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 454 Timing MAY be in error, as GPS system is not operating consistently. The GPS system at BILL is not operating correctly, and timing in the data is suspect. Data should be used with caution. END PROBLEM RESOLUTION REPORT ASL2005:029 2005/02/18 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The BILL GPS system returned to normal operation at 2004, 251, 12:41. Timing quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2005:027 2005/02/14 ASL DCC Valerie Peyton ASL TIXI IU 00/*HN 2005,034,16:35:00 2005,070,23:32:00 Problem Description NOISE SEED COMMENT REFERENCE C 4410 Channel data quality is poor. The TIXI STS1 N/S data become very noisy at 16:30 UTC on Feb 3, 2005. END PROBLEM RESOLUTION REPORT ASL2005:027 2005/06/17 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The noise problem on the TIXI STS1 N appears to be gone as of 2005, 070, 23:32. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2005:028 2005/02/14 ASL DCC Valerie Peyton ASL GNI IU */* 2004,131,06:40:00 2004,163,09:17:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 452 Timing IS in error, as clock is unlocked. The GNI GPS system is not locked on to the GPS satellite signal. Timing in the data should be considered incorrect. END PROBLEM RESOLUTION REPORT ASL2005:028 2005/02/14 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The GNI GPS system returns to normal operation at 2004, 163, 09:17. Timing quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT IDA2004:001 2004/02/12 IDA DCC Erik Klimczak IDA JTS II BHN-00,LHN-00,VHN-00 2004,009,00:26:00 2004,009,00:26:00 Problem Description DEAD CHANNEL The north-south and vertical channels for the STS-1 sensor are out. Failure of DAS RT303 boards are suspected. END **************************************************************************** DATA PROBLEM REPORT ASL2005:036 2005/02/23 ASL DCC Valerie Peyton ASL HRV IU */* 2005,051,08:35:00 2005,054,14:36:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. The HRV station operator is performing station maintenance to repair damage done by a UPS failure. Expect variable data quality and availability. END PROBLEM RESOLUTION REPORT ASL2005:036 2005/02/23 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The HRV station operator finished station maintenance at 2005, 054, 14:36. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2005:037 2005/02/25 ASL DCC Valerie Peyton ASL QSPA IU 20/*H* 2005,056,01:04:00 2005,056,16:12:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. All three masses of the QSPA STS2 have fallen against their stops. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2005:037 2005/02/25 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION We were able to remotely recenter the QSPA STS2. Data quality returns to normal at 2005, 056, 16:12. END **************************************************************************** DATA PROBLEM REPORT ASL2005:034 2005/02/21 ASL DCC Valerie Peyton ASL KONO IU */* 2005,050,10:24:00 2005,068,09:03:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. An ASL field team is on site at KONO for station maintenance. Expect variable data quality and availability, as well as tests, calibrations, and other data anomalies. Since two goals of this visit are to replace the DA-DP comm link and to replace the GPS cable (an ~3km run of cable), long data outages are expected. END PROBLEM RESOLUTION REPORT ASL2005:034 2005/03/17 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The ASL field team left KONO in excellent operational condition at 2005, 068, 09:03. With the exception of the continuing timing problems, data quality returns to normal at this time. Please continue to reference ASL2004:070 for updates on the timing problem. END **************************************************************************** DATA PROBLEM REPORT ASL2005:035 2005/02/22 ASL DCC Valerie Peyton ASL HRV IU *HZ 2005,051,23:12:00 2005,054,14:36:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4625 Invalid instrument response. The Z component of the STS1 at HRV has developed a response problem. The response is correct only below 0.12 Hz (8.3 sec). Above 0.12 Hz, the response is 2dB to 28dB to low. END PROBLEM RESOLUTION REPORT ASL2005:035 2005/02/23 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The HRV station operator repaired the Z component of the STS1. Data quality and instrument response return to normal at 2005, 054, 14:36. END **************************************************************************** DATA PROBLEM REPORT ASL2005:032 2005/02/21 ASL DCC Valerie Peyton ASL PAYG IU 10/*H* 2005,051,06:15:00 2005,051,06:15:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. All three components of the CMG3T-B at PAYG have gone to digitizer noise. Data are not useable. END **************************************************************************** DATA PROBLEM REPORT ASL2005:033 2005/02/21 ASL DCC Valerie Peyton ASL KBS IU */* 2005,045,00:00:00 2005,048,21:16:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. An ASL field team is on site at KBS for station maintenance. Expect variable data quality and availability, as well as tests, calibrations, and other data anomalies. END PROBLEM RESOLUTION REPORT ASL2005:033 2005/02/21 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The ASL field team left KBS in excellent operational condition at 2005, 048, 21:16. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2005:030 2005/02/18 ASL DCC Valerie Peyton ASL BILL IU */* 2004,259,07:24:00 2004,291,03:45:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 454 Timing MAY be in error, as GPS system is not operating consistently. The GPS system at BILL is not operating correctly, and timing in the data is suspect. Data should be used with caution. END PROBLEM RESOLUTION REPORT ASL2005:030 2005/02/21 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The GPS system at BILL returns to normal operation at 2004, 291, 03:45. Timing quality in the data also returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2005:031 2005/02/18 ASL DCC Valerie Peyton ASL TRQA IU 10/*HZ 2005,046,16:55:00 2005,066,18:18:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4620 Incorrect instrument response for low frequencies only The Z component of the CMG3T-B at TRQA has a response problem. The problem is dominant in the low frequecies. From 1Hz down through all the lower frequencies the response is 2dB to 35dB lower than it should be. Above 1Hz all through the high frequencies, the reponse appears to be correct. Despite this appearance, we recommend the high frequency data only be used with caution. END PROBLEM RESOLUTION REPORT ASL2005:031 2005/03/08 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The TRQA station operator locked, unlocked and recentered the CMG3T-B. This action corrected the response problem on the Z component. Data quality returns to normal at 2005, 066, 18:18. END **************************************************************************** DATA PROBLEM REPORT ASL2005:038 2005/03/02 ASL DCC Valerie Peyton ASL TIXI IU 00/*HN 2005,057,01:13:00 2005,057,01:13:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The TIXI STS1 N component is currently in a square wave oscillation with a period of ~1445 sec (24 minutes) and an amplitude of ? 3.9 million counts. This is making the data unuseable. This problem started when the TIXI swapped the STS1 N & E feedback electronics boxes in an attempt to diagnose a noise problem on the N. Hopefully the problem will be corrected when the feedback boxes are returned their original configuration. END PROBLEM RESOLUTION REPORT ASL2005:038 2005/03/14 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION The square wave oscillation is gone; data seem normal. END **************************************************************************** DATA PROBLEM REPORT ASL2005:039 2005/03/04 ASL DCC Valerie Peyton ASL WVT IU *H* 2005,062,16:23:00 2005,062,16:23:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. ALl three STS1 components at WVT are dead. END **************************************************************************** DATA PROBLEM REPORT ASL1999:061 1999/10/07 ASL DCC Tyler Storm ASL WAKE IU ? 1999,249,14:15:00 1999,277,02:50:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 451 Timing MAY be in error, as clock is unlocked. Clock is intermittently unlocked from the timing standard during this time frame. END PROBLEM RESOLUTION REPORT ASL1999:061 2001/08/13 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION A more consistent clock lock at WAKE is achieved beginning early in the day on 1999,277. During the time that the clock was locking intermittantly, there are entire day spans of good lock interspersed with episodes of no clock of varying duration. END **************************************************************************** DATA PROBLEM REPORT ASL1999:060 1999/10/07 ASL DCC Tyler Storm ASL PET IU ? 1999,184,20:15:00 1999,210,06:27:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 440 Clock Unlocked. System clock is unlocked from timing standard. END PROBLEM RESOLUTION REPORT ASL1999:060 2003/06/24 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION A reliable clock lock was re-established at PET at 1999, 210, 06:27. Timing quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL1999:063 1999/10/15 ASL DCC Tyler Storm ASL KBS DW 10/*HN, 10/*HE 1999,105,14:20:00 1999,279,18:35:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. Data from the STS-2 instrument N and E channels unusable. END PROBLEM RESOLUTION REPORT ASL1999:063 2000/06/12 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The N and E channels of the STS-2 at KBS came back online on 1999,279,18:35. END **************************************************************************** DATA PROBLEM REPORT ASL1999:062 1999/10/12 ASL DCC Tyler Storm ASL NWAO IU 00/BHZ, 00/LHZ, 00/VHZ, 00/UHZ, *HZ 1998,001,00:00:00 1998,001,00:00:00 Problem Description Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE C 2008 Long period "burps". There are one or two large pulses per hour. END PROBLEM RESOLUTION REPORT ASL1999:062 2001/09/24 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The long period pulses on the Z component of the KS36000I at NWAO appear to have disappeared. Data quality is much better. END **************************************************************************** DATA PROBLEM REPORT ASL1999:065 1999/11/04 ASL DCC Tyler Storm ASL PMG IU 00/BH?, 00/LH?, 00/VH?, 00/UH? 1999,237,04:20:00 1999,243,01:30:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. Channels from the STS-1 instruments are dead. END PROBLEM RESOLUTION REPORT ASL1999:065 2003/06/11 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION All three of the STS1 channels at PMG returned to normal operation at 1999, 243, 01:30. END **************************************************************************** DATA PROBLEM REPORT ASL1999:064 1999/11/01 ASL DCC Tyler Storm ASL ANMO IU 10/?H? 1999,290,01:12:00 1999,302,23:30:00 Problem Description OTHER SEED COMMENT REFERENCE C 4010 Channel is down. Data from the CMG3-T instrument are unusable due to problems associated with a lightning strike. END PROBLEM RESOLUTION REPORT ASL1999:064 2000/06/09 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The problems caused to the ANMO CMG3-T by a lightning strike were fixed on 1999,302,23:30:00. END **************************************************************************** DATA PROBLEM REPORT HRV1997:008 1997/01/23 Harvard WQC N.Maternovskaya ASL MDJ CD LHN LHE 1996,122,09:21:00 1996,122,09:21:00 Problem Description LOW FREQUENCY NOISE Postscript file was placed into /pub/qc/qc_ps. END PROBLEM RESOLUTION REPORT HRV1997:008 1997/02/06 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION The N/S, and Z data are unusable during this time frame. The old system was "on it way out" at this point, and it was not worth the effort (money) to diagnose/fix a problem with a system which was slotted for an upgrade within a few months. SUPPLEMENT For the full duration of these and other digitizer-related problems, please see HRV1995:051. END **************************************************************************** DATA PROBLEM REPORT ASL2005:083 2005/06/07 ASL DCC Valerie Peyton ASL MA2 IU 00/*HN 2005,158,03:57:00 2005,159,03:30:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The N component of the STS1 at MA2 has fallen against one of its stops. Very large events are still visible, but data should be used with caution. END PROBLEM RESOLUTION REPORT ASL2005:083 2005/06/08 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The MA2 station operator recentered the STS1 N component. Data quality returns to normal at 2005, 159, 03:30. END **************************************************************************** DATA PROBLEM REPORT ASL1999:067 1999/11/17 ASL DCC George Slad ASL BJT IC EH*, SH* 1994,342,00:00:00 1994,348,00:00:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 1835 TEST DATA Maintenance personnel were working on the GS-13 at this time. Data may not be usable END PROBLEM RESOLUTION REPORT ASL1999:067 1999/11/17 ASL DCC george Description of Problem Resolution COMMENT Maintenance personnel adjusted the sensitivities during this time period. END **************************************************************************** DATA PROBLEM REPORT HRV1997:009 1997/01/23 Harvard WQC N.Maternovskaya SPYDER MDJ IC LHE LHN 1997,017,11:20:00 1997,017,11:20:00 Problem Description POLARITY REVERSED Postscript file was placed into /pub/qc/qc_ps. END PROBLEM RESOLUTION REPORT HRV1997:009 1997/02/06 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION See ASL1996:052 (DPR, and PRR). SUPPLEMENT The polarity of the IC/MDJ STS1 horizontals was no longer reversed at this time. However, if an old copy of the dataless had been used to extract the IC/MDJ data, it is possible that a polarity reversal could have been introduced into the data. The channel epoch covering the time period for which polarities were reversed ended at 1996, 347, 01:22. All IC/MDJ STS1 horizontal data has correct polarity after that time. END **************************************************************************** DATA PROBLEM REPORT ASL2005:084 2005/06/07 ASL DCC Valerie Peyton ASL MA2 IU 00/*HE 2005,158,12:35:00 2005,159,03:30:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The E component of the STS1 at MA2 has fallen against one of its stops. Very large events are still visible, but data should be used with caution. END PROBLEM RESOLUTION REPORT ASL2005:084 2005/06/08 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The MA2 station operator recentered the STS1 E component. Data quality returns to normal at 2005, 159, 03:30. END **************************************************************************** DATA PROBLEM REPORT ASL1999:066 1999/11/17 ASL DCC George Slad ASL BJT IC EH*, SH* 1994,145,00:00:00 1994,342,00:00:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4615 Channel has high sensitivity. The sensitivity of the GS-13 after the initial installation was incorrect. END PROBLEM RESOLUTION REPORT ASL1999:066 1999/11/17 ASL DCC George Slad Description of Problem Resolution RESOLUTION The sensitivity has been corrected to reflect the value computed by comparing data recorded simultaneously on the STS-1 seismometers at BJT. END **************************************************************************** DATA PROBLEM REPORT ASL2005:081 2005/06/06 ASL DCC Valerie Peyton ASL QSPA IU 20/*H* 2005,154,11:28:00 2005,156,03:45:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. All three compnents of the STS2 at QSPA have fallen against their stops. Very large events are still visible, but data should be used with caution. END PROBLEM RESOLUTION REPORT ASL2005:081 2005/06/06 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The QSPA STS2 was recentered, and data quality returns to normal at 2005, 156, 03:45. END **************************************************************************** DATA PROBLEM REPORT ASL1999:069 1999/11/29 ASL DCC Tyler Storm ASL JOHN IU 10/BH1, 10/LH1, 10/HH1 1999,294,00:00:00 1999,299,21:41:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The Guralp (1) component has lost mass capture. Data are unusable. END PROBLEM RESOLUTION REPORT ASL1999:069 2001/08/09 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The station operator at JOHN recentered the CMG3-T-B. Data quality returns to normal late in the day on 1999,299. END **************************************************************************** DATA PROBLEM REPORT ASL2005:082 2005/06/06 ASL DCC Valerie Peyton ASL GNI IU */* 2003,352,14:29:00 2003,352,17:17:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 454 Timing MAY be in error, as GPS system is not operating consistently. The GNI GPS system is not locked on to the GPS satellite signal. Timing in the data should be considered incorrect. END PROBLEM RESOLUTION REPORT ASL2005:082 2005/06/06 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The GNI GPS system returns to normal operation at 2003, 352, 17:17. Timing quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL1999:068 1999/11/22 ASL DCC George Slad ASL MIDW IU BH*,LH*,VH*,UH* 1999,296,00:00:00 1999,316,11:18:00 Problem Description OTHER SEED COMMENT REFERENCE S 110 TEST DATA: Calibration, and testing in progress. Initial installation test data exists during this time period. No action necessary. END PROBLEM RESOLUTION REPORT ASL1999:068 2003/05/29 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Installation of MIDW ended at 1999, 316, 11:18. Data quality is normal beginning at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2005:080 2005/06/02 ASL DCC Tyler Storm ASL KIP IU 10/* 2005,152,10:14:00 2005,153,23:05:15 Problem Description OTHER SEED COMMENT REFERENCE C 4010 Channel is down. Data from the STS-2 are unusable. END PROBLEM RESOLUTION REPORT ASL2005:080 2005/06/03 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Data are back to normal at 2005,153,23:05:15 END **************************************************************************** DATA PROBLEM REPORT HRV1997:001 1997/01/23 Harvard WQC N.Maternovskaya DMC AFI IU LHE 1996,162,04:03:00 1996,162,04:03:00 Problem Description POLARITY REVERSED Postscript file was placed into /pub/qc/qc_ps. # END **************************************************************************** DATA PROBLEM REPORT HRV1997:002 1997/01/23 Harvard WQC N.Maternovskaya SPYDER ANMO IU VHZ 1996,366,12:41:00 1996,366,12:41:00 Problem Description OTHER Postscript file was placed into /pub/qc/qc_ps. END **************************************************************************** DATA PROBLEM REPORT ASL2005:089 2005/06/09 ASL DCC Valerie Peyton ASL TIXI IU 00/*HE 2005,159,00:07:00 2005,165,05:11:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The E component of the STS1 at TIXI has fallen against one of its stops. Very large events might be visible, but aside from that, data are not useable. END PROBLEM RESOLUTION REPORT ASL2005:089 2005/06/16 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The TIXI station operator finished recentering the STS1 E component at 2005, 162, 05:22. For the next couple of days, the mass was still unstable, although there are a few quiet periods of useable data. Data quality returns to normal at 2005, 165, 05:11. END **************************************************************************** DATA PROBLEM REPORT HRV1997:003 1997/01/23 Harvard WQC N.Maternovskaya ASL BORG II LHN 1996,210,06:11:00 1996,210,06:11:00 Problem Description LOW FREQUENCY NOISE Postscript file was placed into /pub/qc/qc_ps. END PROBLEM RESOLUTION REPORT HRV1997:003 1997/02/07 IDA Peter Davis Description of Problem Resolution COMMENT For most time periods since installation, we have observed the noise on the NS component of the KS-54000 at BORG to be 10 dB higher than for the EW component at periods of 200 seconds and greater. During very brief spells, this is not the case: the NS component quiets to levels comparable to the EW. We generally attribute this behavior to malfunctioning of the instrument, but it has also been suggested that geothermal activity near the site may be responsible. END **************************************************************************** DATA PROBLEM REPORT HRV1997:004 1996/01/23 Harvard WQC N.Maternovskaya ASL BRVK II BHN 1996,132,13:43:00 1996,132,13:43:00 Problem Description LOW FREQUENCY NOISE Postscript file was placed into /pub/qc/qc_ps. END PROBLEM RESOLUTION REPORT HRV1997:004 1997/02/07 IDA Peter Davis Description of Problem Resolution COMMENT We concur that the NS component of the STS-1 is noisier. The station operator noted on 1996,136 that "The level of noise is 10.0 db. greater than the E-W for frequencies < 0.1 Hz." We do not believe the noise existed at this sustained level before 1996,105. It appears to persist at a level of about 10 dB greater than EW up to the present. The reason for the noise is unknown at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2005:087 2005/06/07 ASL DCC Valerie Peyton ASL KONO IU 10/*HE 10/*HN 2005,158,16:50:00 2005,159,17:09:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The horizontal components of the CMG3T at KONO have fallen against their stops. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2005:087 2005/06/08 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION We were able to remotely recenter the KONO CMG3T. Data quality returns to normal at 2005, 159, 17:09. END **************************************************************************** DATA PROBLEM REPORT HRV1997:005 1997/01/23 Harvard WQC N.Maternovskaya DMC DBIC GT LHN 1996,212,17:38:00 1996,212,17:38:00 Problem Description OTHER Amplitude of the observed signals is much lower than expected. Postscript file was placed into /pub/qc/qc_ps. END **************************************************************************** DATA PROBLEM REPORT ASL2005:088 2005/06/07 ASL DCC Valerie Peyton ASL TEIG IU */* 2005,152,15:17:00 2005,158,16:42:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 451 Timing MAY be in error, as clock is unlocked. The TEIG data acquisition system set itself to internal timing at 2005, 152, 15:17. This means the data were timed without reference to the GPS timing standard. Timing quality should be considered suspect. END PROBLEM RESOLUTION REPORT ASL2005:088 2005/06/07 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION ASL staff were able to remotely reset the TEIG clock and cause it to start using the GPS timing system. Timing quality returns to normal at 2005, 158, 16:42. END **************************************************************************** DATA PROBLEM REPORT HRV1997:006 1997/01/23 Harvard WQC N.Maternovskaya ASL ENH CD BHZ BHN BHE 1996,198,03:48:00 1996,198,03:48:00 Problem Description OTHER Postscript file was placed into /pub/qc/qc_ps. END **************************************************************************** DATA PROBLEM REPORT ASL2005:085 2005/06/07 ASL DCC Valerie Peyton ASL KIP IU */* 2005,153,22:20:00 2005,153,23:03:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. There is an ASL field team at KIP performing station maintenance. Expect variable data quality and availability. END PROBLEM RESOLUTION REPORT ASL2005:085 2005/06/07 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION KIP station maintenance was finished at 2005, 153, 23:03. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT HRV1997:007 1997/01/23 Harvard WQC N.Maternovskaya SPYDER HNR IU VHZ VHN VHE 1997,000,23:02:15 1997,000,23:02:15 Problem Description DATA DROPOUTS The data for the first 100 minutes after the event are missing. Postscript file was placed into /pub/qc/qc_ps. END **************************************************************************** DATA PROBLEM REPORT ASL2005:086 2005/06/07 ASL DCC Valerie Peyton ASL KONO IU */* 2005,158,13:33:00 2005,158,19:00:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. The KONO station operator is in the vault performing station maintenance during this time. Expect variable data quality and availability. END PROBLEM RESOLUTION REPORT ASL2005:086 2005/06/20 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The KONO station operator finished station maintenance at 2005, 158, 19:00. For the most part, data quality returns to normal at this time. For a maintenance- induced problem on the STS2 horizontals, please see ASL2005:087. END **************************************************************************** DATA PROBLEM REPORT ASL1999:070 1999/12/08 ASL DCC George Slad ASL DAV IU BHE,LHE,VHE,UHE 1999,277,09:00:00 1999,302,07:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. Location code 00 The east component STS-1 lost mass capture. Data are unusable. END **************************************************************************** DATA PROBLEM REPORT ASL1999:072 1999/12/14 ASL DCC George Slad ASL XMAS IU ?H? 1999,335,08:00:00 1999,350,18:12:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The STS-2 has lost mass capture. Data are unusable. END PROBLEM RESOLUTION REPORT ASL1999:072 2000/01/21 ASL DCC valerie Description of Problem Resolution RESOLUTION Masses in the XMAS STS-2 sensor were re-centered 1999,350,18:12 and the data are now useable once more. END **************************************************************************** DATA PROBLEM REPORT ASL1999:071 1999/12/14 ASL DCC George Slad ASL XMAS IU 00/*H* 01/*H* 1999,298,17:00:00 1999,328,08:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The STS-2 has lost mass capture. Data are unusuable. END PROBLEM RESOLUTION REPORT ASL1999:071 1999/12/14 ASL DCC George Slad Description of Problem Resolution RESOLUTION The seismometer mass came off the stop. Normal data follows. END **************************************************************************** DATA PROBLEM REPORT HRV1997:019 1997/05/15 Harvard WQC N.Maternovskaya ASL YSS IU LHZ, BHZ 1996,283,13:10:00 1996,283,13:10:00 Problem Description DATA GLITCHES Postscript file was placed into /pub/qc/qc_ps. END PROBLEM RESOLUTION REPORT HRV1997:019 2000/03/30 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Random long-period pulses were observed on the vertical component of the STS1 at YSS from 1996,182 to 1997,240. The cause and the cure have not been identified, but the problem appears to have ceased. For more information, please also see ASL1996:037. END **************************************************************************** DATA PROBLEM REPORT ASL2005:094 2005/06/09 ASL DCC Valerie Peyton ASL POHA IU */* 2005,147,20:00:00 2005,150,23:10:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. An ASL field team is at POHA for station maintenance. Expect variable data quality and availability, as well as calibrations and tests. END PROBLEM RESOLUTION REPORT ASL2005:094 2005/06/10 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The ASL field team finished maintenance work and left POHA in excellent operational order. Data quality returns to normal at 2005, 150, 23:10. END **************************************************************************** DATA PROBLEM REPORT ASL2005:095 2005/06/10 ASL DCC Valerie Peyton ASL MIDW IU */* 2005,151,13:38:00 2005,163,23:43:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. An ASL field engineer is at MIDW for station maintenance, and to move the STS2 sensor out of the room it is in to a surface vault. Expect variable data quality and availability, as well as calibrations and tests. END PROBLEM RESOLUTION REPORT ASL2005:095 2005/06/16 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The ASL field engineer left MIDW in excellent operational condition at 2005, 163, 23:43. Data quality returns to normal at this time. Acutally, to better than normal: Now that the STS2 is in a surface vault, not in a small room with an air conditioner which cycles on and off, data is overall much quieter. END **************************************************************************** DATA PROBLEM REPORT ASL2005:092 2005/06/09 ASL DCC Valerie Peyton ASL JOHN IU */* 2005,157,02:10:00 2005,157,02:10:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE S 2505 Data intermittant. The JOHN power system appears unable to sustain the station when the sun sets. As a result, data are available during local daylight hours only. This problem will persist until we are next able to reach Johnston Atoll. This will take some time, as Johnston Atoll is currently closed down, transportation to and from the Atoll is nigh-unto non-existent, and the JOHN station essentially is running without maintenance opportunities. A recent field trip (see ASL2005:090) was made possible by the marooning of a privately-owned sailboat on Johnston Atoll. The US Coast Guard, aware of our desire to visit to Atoll to try and get JOHN running, asked if we wanted to send a field engineer on the rescue boat. We were given ~5 hours to prepare for the trip, and the success was in bringing JOHN up at all. END **************************************************************************** DATA PROBLEM REPORT ASL2005:093 2005/06/09 ASL DCC Valerie Peyton ASL WAKE IU */* 2005,149,01:44:00 2005,161,02:41:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. An ASL field engineer is at WAKE for station maintenance. Expect variable data quality and availability, as well as calibrations and tests. END PROBLEM RESOLUTION REPORT ASL2005:093 2005/06/10 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The ASL field engineer finished maintenance work and left WAKE in excellent operational order. Data quality returns to normal at 2005, 161, 02:41. END **************************************************************************** DATA PROBLEM REPORT ASL2005:090 2005/06/09 ASL DCC Valerie Peyton ASL JOHN IU */* 2005,157,02:00:00 2005,158,10:00:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. An ASL field engineer is on-site at JOHN in an attempt to get the station operational. Expect variable data quality and availability. END PROBLEM RESOLUTION REPORT ASL2005:090 2005/06/09 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The ASL field engineer left JOHN in operational order at 2005, 158, 10:00. Data quality returns almost to normal at this time. The CMG3-T-B was found in partially operational order: only the Z component is working. Because this field trip was a trip of opportunity (tagging along on a Coast Guard rescue mission to Johnston Atoll), our field engineer had no equipment along for seismometer repairs. The next trip of opportunity may not be for years. For the full time span of the CMG3-T-B problems, please see ASL2005:091. END **************************************************************************** DATA PROBLEM REPORT ASL2005:091 2005/06/09 ASL DCC Valerie Peyton ASL JOHN IU 00/*H1 00/*H2 2005,157,02:10:00 2005,157,02:10:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The horizontal components of the CMG3-T-B at JOHN are both pegged. Data are unuseable. Johnston Atoll is currently closed down, and the JOHN station essentially is running without maintenance opportunities. A recent field trip (see ASL2005:090) was made possible by the marooning of a privately-owned sailboat on Johnston Atoll. The US Coast Guard, aware of our desire to visit to Atoll to try and get JOHN running, asked if we wanted to send a field engineer on the rescue boat. We were given ~5 hours to prepare for the trip, and the success was in bringing JOHN up at all. Repair of the CMG3-T-B was impossible. But hopefully we will have more notice before the next trip of opportunity. END **************************************************************************** DATA PROBLEM REPORT HRV1997:011 1997/01/23 Harvard WQC N.Maternovskaya ASL MLAC TS BHZ BHN BHE 1996,155,08:15:00 1996,155,08:15:00 Problem Description INCORRECT TIME Postscript file was placed into /pub/qc/qc_ps. END PROBLEM RESOLUTION REPORT HRV1997:011 2000/03/28 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Looking at the data from station MLAC on 1996, 155, there are no apparent timing errors. The event visible in the file /pub/qc/qc_ps/HRV97:011 is a large local event. If you low-pass these data, a teleseismic event is visible, and the predicted P arrival for this event plots right on time. Looking at a couple of weeks of data from MLAC in 1996, it appears that the station is in a region that produces a large number of local events. These local events often dominate the signal and must be filtered out in order to see teleseisms. END **************************************************************************** DATA PROBLEM REPORT HRV1997:012 1997/01/23 Harvard WQC N.Maternovskaya DMC SHEL II VHZ 1996,155,08:15:00 1996,155,08:15:00 Problem Description INVALID RESPONSE Postscript file was placed into /pub/qc/qc_ps. END **************************************************************************** DATA PROBLEM REPORT HRV1997:013 1997/01/23 Harvard WQC N.Maternovskaya ASL SNZO IU LHZ 1996,366,12:41:00 1996,366,12:41:00 Problem Description DATA DROPOUTS Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1997:013 1997/02/06 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION The problem has already been cited in ASL1997:000. END **************************************************************************** DATA PROBLEM REPORT HRV1997:014 1997/01/24 Harvard WQC N.Maternovskaya ASL TAU II LHZ 1996,226,06:38:00 1996,226,06:38:00 Problem Description DATA GLITCHES Postscript file was placed into /pub/qc/qc_ps. END PROBLEM RESOLUTION REPORT HRV1997:014 1997/02/06 IDA Peter Davis Description of Problem Resolution COMMENT The data glitches evident in the PostScript file attached to HRV1997:044 are completely absent from the corresponding data in our archive. As a test of our procedures, we remade a SEED volume for these data, and then used rdseed to extract the data (in CSS format, the format used in our archive) to compare with our archived data. This test showed the data were recovered perfectly. We conclude that the glitches were either introduced when the data were archived or de-archived at the DMC or by some step in the Harvard analysis procedure. END **************************************************************************** DATA PROBLEM REPORT HRV1997:015 1997/01/24 Harvard WQC N.Maternovskaya ASL TAU II LHN 1996,207,12:49:00 1996,207,12:49:00 Problem Description DATA GLITCHES Postscript file was placed into /pub/qc/qc_ps. END PROBLEM RESOLUTION REPORT HRV1997:015 1997/02/06 IDA Peter Davis Description of Problem Resolution COMMENT Please see HRV1997:014. END **************************************************************************** DATA PROBLEM REPORT ASL2005:098 2005/06/13 ASL DCC Valerie Peyton ASL TEIG IU 10/*H* 2005,162,01:14:00 2005,326,00:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. All three components of the TEIG CMG3-T-B have developed a problem, rendering the data unuseable. The problem has an ~53-second period. On the Z component, it manifests itself as a dual-polarity pulse. On the 1 component, the problem manifests itself as the mass oscillating between 400 and 500 counts; this causes the data counts to oscillate between +/- 3.4 million counts. On the 2 component, the problem manifests itself as electrical impulses interfering with the data. All three channels are synchronized in their pulsing. SUPPLEMENT 2005, 165 The borehole control unit of the TEIG CMG3-T-B has malfuntioned and is sending mass centering commands to the seismometer every minute. This is the source of the problems described above. To prevent further damage to the instrument, it will be powered off until the borehole control unit can be replaced. END PROBLEM RESOLUTION REPORT ASL2005:098 2006/07/03 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The TEIG CMG3-T-B was replaced. Data quality returns to normal at 2005, 326, 00:00. END **************************************************************************** DATA PROBLEM REPORT HRV1997:016 1997/01/28 Harvard WQC Misha Salganik SPYDER SSPA IU LHE 1997,000,11:20:28 1997,000,11:20:28 Problem Description POLARITY REVERSED Postscript file was placed into /pub/qc/qc_ps # END PROBLEM RESOLUTION REPORT HRV1997:016 1997/02/06 ASL DCC Tyler Storm Description of Problem Resolution COMMENT The station management is aware of the polarity reversal. If they correct the reversal, I will modify the response. END **************************************************************************** DATA PROBLEM REPORT ASL2005:099 2005/06/21 ASL DCC Valerie Peyton ASL GUMO IU */* 2005,172,07:24:00 2005,178,06:09:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 452 Timing IS in error, as clock is unlocked. The GPS system at GUMO appears to be operating inconsistently. Clock drift values are erratic and large, causing small gaps in the data from the jumps in timing. Timing should be considered incorrect, and data should only be used with caution. END PROBLEM RESOLUTION REPORT ASL2005:099 2005/06/27 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The GUMO station operator replaced the GPS system and timing quality returns to normal at 2005, 178, 06:09. END **************************************************************************** DATA PROBLEM REPORT HRV1997:017 1997/02/14 Harvard WQC N.Maternovskaya ASL BAR TS LHN, BHN, UHN, VHN 1996,212,19:33:00 1996,212,19:33:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. It looks like a digitizer problem. Postscript file was placed into /pub/qc/qc_ps. END PROBLEM RESOLUTION REPORT HRV1997:017 2000/03/28 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The N component of the STS1 at BAR was inoperational from 1996,212,19:33 to 1996,219,21:30. Since only digitizer noise was recorded for the N component during this time span, it is likely that this component was not properly connected to the digitizer at the time. END **************************************************************************** DATA PROBLEM REPORT ASL2005:096 2005/06/13 ASL DCC Valerie Peyton ASL COLA IU 00/*H* 2005,162,07:14:00 2005,271,21:04:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. All three channels of the 54000 borehole instrument at COLA have gone to digitizer noise. All three channels failed simultaneously. The problem is being investigated. Meanwhile, data are not useable. END PROBLEM RESOLUTION REPORT ASL2005:096 2005/10/06 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The COLA 54000 was removed, repaired on site, and reinstalled. Data quality returns to normal at 2005, 271, 21:04. END **************************************************************************** DATA PROBLEM REPORT HRV1997:018 1997/03/27 Harvard WQC N.Maternovskaya DMC YSS IU BHZ LHZ 1996,255,02:37:00 1996,255,02:37:00 Problem Description LOW FREQUENCY NOISE Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1997:018 2000/03/30 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Random long-period pulses were observed on the vertical component of the STS1 at YSS from 1996,182 to 1997,240. The cause and the cure have not been identified, but the problem appears to have ceased. For more information, please also see ASL1996:037. END **************************************************************************** DATA PROBLEM REPORT ASL2005:097 2005/06/13 ASL DCC Valerie Peyton ASL SDV IU */* 2005,163,20:43:00 2005,166,05:56:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 454 Timing MAY be in error, as GPS system is not operating consistently. The GPS system at SDV was not able to obtain a solid lock on the GPS satellites during this time. This caused the GPS system to not operate consistently, and produced timing jumps. Data should be used with caution. END PROBLEM RESOLUTION REPORT ASL2005:097 2005/06/27 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The SDV GPS system obtained a solid lock on the satellite signal at 2005, 166, 05:56. Timing quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT HRV1997:010 1997/01/23 Harvard WQC N.Maternovskaya SPYDER PAS TS VHZ 1997,021,01:48:00 1997,021,01:48:00 Problem Description INVALID RESPONSE Postscript file was placed into /pub/qc/qc_ps. END PROBLEM RESOLUTION REPORT HRV1997:010 1997/02/06 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION See HRV1996:015 (DPR, and PRR). END **************************************************************************** DATA PROBLEM REPORT ASL2005:061 2005/04/28 ASL DCC Tyler Storm ASL SAML IU 00/?H1, 00/?H2 2005,082,15:35:00 2005,082,15:35:00 Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE C 2604 Long period "burps". Data contain pulses during this time frame. END **************************************************************************** DATA PROBLEM REPORT ASL2005:062 2005/04/29 ASL DCC Tyler Storm ASL QSPA IU 20/* 2005,118,21:42:00 2005,122,12:56:00 Problem Description OTHER SEED COMMENT REFERENCE C 4410 Channel data quality is poor. The instrument masses begin drifting toward the stops at 2005,118,21:42:00. END PROBLEM RESOLUTION REPORT ASL2005:062 2005/05/02 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Instrument was re-centered 2005,122,12:56:00. END **************************************************************************** DATA PROBLEM REPORT ASL2005:060 2005/04/27 ASL DCC Valerie Peyton ASL KEV IU */* 2005,109,23:29:00 2005,117,19:14:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 451 Timing MAY be in error, as clock is unlocked. The GPS system at KEV has lost contact with the GPS satellite system. Timing is ambiguously incorrect as the system tries to keep time without the help of the GPS standard. END PROBLEM RESOLUTION REPORT ASL2005:060 2005/04/27 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION ASL field personnel were able to remotely reset the KEV GPS system. This action enabled the GPS system to re-establish contact with the GPS satellite system. Timing quality returns to normal at 2005, 117, 19:14. END **************************************************************************** DATA PROBLEM REPORT HRV1997:022 1997/06/18 Harvard WQC N.Maternovskaya ASL ANMO IU LHU 1997,000,35:10:37 1997,000,35:10:37 Problem Description OTHER It looks like a digitizer problem. Postscript file was placed into /pub/qc/qc_ps. END PROBLEM RESOLUTION REPORT HRV1997:022 2000/03/24 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The problem is not with the digitizer, so much as with the seismometer. The seismometer being recorded on the LHU/V/W channels at ANMO was disconnected at 1997,022,16:22 so it could be shipped to a station that needed it. Unfortunately, data acquisition on the LHU/V/W channels continued for about three months after the seismometer was removed. For the full time span of the problem, please see ASL2000:080. END **************************************************************************** DATA PROBLEM REPORT ASL2005:069 2005/05/19 ASL DCC Valerie Peyton ASL SDV IU */* 2005,138,21:36:00 2005,139,10:43:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 454 Timing MAY be in error, as GPS system is not operating consistently. The GPS system at SDV was not able to obtain a solid lock on the GPS satellites during this time. This caused the GPS system to not operate consistently, and produced timing jumps. Data should be used with caution. END PROBLEM RESOLUTION REPORT ASL2005:069 2005/05/19 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The SDV GPS system obtained a solid lock on the satellite signal at 2005, 125, 11:36. Timing quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT HRV1997:023 1997/06/18 Harvard WQC N.Maternovskaya ASL ENH CD LHZ LHN LHE 1997,000,58:21:08 1997,000,58:21:08 Problem Description OTHER LH? data missing after BH? trigger.Postscript file was placed into /pub/qc/qc_ps. END PROBLEM RESOLUTION REPORT HRV1997:023 2000/03/23 ASL DCC Valerie Peyton Description of Problem Resolution COMMENT Station ENH had several data dropouts on 1997, 058, and we currently do not know why. Among these data dropouts are a loss of 19.5minutes of LH? data beginning at 1997,058,21:16 (just after an event begins to come in). Since ENH is at this point collecting data well, no further action will be taken. END **************************************************************************** DATA PROBLEM REPORT HRV1997:024 1997/06/18 Harvard WQC N.Maternovskaya ASL SPA IU LHN 1997,057,18:27:00 1997,057,18:27:00 Problem Description DATA DROPOUTS Postscript file was placed into /pub/qc/qc_ps. END PROBLEM RESOLUTION REPORT HRV1997:024 2000/03/22 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION In the file /pub/qc/qc_ps/HRV1997:024.ps it is evident that there are data missing from the LHN datastream. However, a check of our current data holdings indicates that we now have all the LHN data, and there are no longer any gaps for 1997,057. I'm not sure why not all of the data were available at the time of the original request, but they are all availble now. END **************************************************************************** DATA PROBLEM REPORT ASL2005:067 2005/05/16 ASL DCC Valerie Peyton ASL TEIG IU 10/*HZ 2005,134,19:18:00 2005,143,20:26:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The Z compnent of the CMG3-T-B at TEIG has fallen against one of its stops. Very large events are still visible, but data should be used with caution. END PROBLEM RESOLUTION REPORT ASL2005:067 2005/05/23 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The TEIG CMG3-T-B was remotely recentered. Data quality returns to normal at 2005, 143, 20:26. END **************************************************************************** DATA PROBLEM REPORT HRV1997:025 1997/06/18 Harvard WQC N.Maternovskaya SPYDER PAS TS VHN VHZ 1997,111,12:02:00 1997,111,12:02:00 Problem Description POLARITY REVERSED Postscript file was placed into /pub/qc/qc_ps. END PROBLEM RESOLUTION REPORT HRV1997:025 2000/04/06 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Although the postscript file /pub/qc/qc_ps/HRV97_025.ps does indeed show there is a problem with the data at PAS for this event, this problem is not currently reproduceable. Our best guess is that the problem was the result of a bad dataless seed volume. The current dataless volume for PAS is correct. The SPYDER data appear to be fine, so we simply recommend users use these data with the most recent dataless volume available. No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT ASL2005:068 2005/05/17 ASL DCC Valerie Peyton ASL QSPA IU 20/*H* 2005,136,21:43:00 2005,139,13:11:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. All three compnents of the STS2 at QSPA have fallen against their stops. Very large events are still visible, but data should be used with caution. END PROBLEM RESOLUTION REPORT ASL2005:068 2005/05/19 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION We were able to remotely recenter the QSPA STS2. Data quality returns to normal at 2005, 139, 13:11. END **************************************************************************** DATA PROBLEM REPORT HRV1997:026 1997/11/14 Harvard WQC N.Maternovskaya ASL HKT IU BHZ BHN BHE 1997,168,21:03:00 1997,168,21:03:00 Problem Description DATA DROPOUTS Postscript file was placed into /pub/qc/qc_ps. END END PROBLEM RESOLUTION REPORT HRV1997:026 2000/03/22 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The BH? data streams at HKT are missing data from 1997,168,19:40 to 1997,168,21:15. HKT is a remote station; the comm links are programmed to send the data through from lowest to highest sample rate, so that when communication problems come up, the first data lost will be higher sample rate data. And indeed for 1997,168, there is continuous data for all but the BH? channels. The comm link at HKT is currently working fine, so no further action will be taken. END **************************************************************************** DATA PROBLEM REPORT ASL2005:065 2005/05/09 ASL DCC Valerie Peyton ASL TIXI IU 00/*HZ 2005,126,17:15:00 2005,133,11:25:00 Problem Description NOISE SEED COMMENT REFERENCE C 4504 Channel exibits high levels of low frequency noise. The Z component of the STS1 at TIXI has developed a long period noise problem. Noise levels are up to 30 dB too high starting at 0.13 Hz and going down through all the lower frequencies. END PROBLEM RESOLUTION REPORT ASL2005:065 2005/05/16 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Noise levels on the Z component of the STS1 at TIXI have returned to normal as of 2005, 133, 11:25. END **************************************************************************** DATA PROBLEM REPORT HRV1997:027 1997/11/14 Harvard WQC N.Maternovskaya ASL PTGA IU LHZ BHZ 1997,168,21:03:00 1997,168,21:03:00 Problem Description LOW FREQUENCY NOISE Postscript file was placed into /pub/qc/qc_ps. END PROBLEM RESOLUTION REPORT HRV1997:027 2000/03/28 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The seismometer at PTGA had been damaged in a lightning strike. Part of the effect of the lightning was to raise the low frequency noise level on the vertical component. The damaged seismometer was replaced 1999,092 and the data quality improved immensely. For more detail on the problem, please see ASL1997:025. END **************************************************************************** DATA PROBLEM REPORT ASL2005:066 2005/05/16 ASL DCC Valerie Peyton ASL KMBO IU 00/*HZ 2005,135,07:25:00 2005,135,07:25:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The Z component of the STS1 at KMBO is pegged. Data are not useable. END **************************************************************************** DATA PROBLEM REPORT HRV1997:028 1997/11/14 Harvard WQC N.Maternovskaya ASL SFJ IU LHN LHE BHN BHE 1997,175,23:04:00 1997,175,23:04:00 Problem Description LOW FREQUENCY NOISE Postscript file was placed into /pub/qc/qc_ps. END PROBLEM RESOLUTION REPORT HRV1997:028 2000/03/22 ASL DCC Valerie Peyton Description of Problem Resolution COMMENT Station SFJ is location in a high noise area; unfortunately, the noise on the horizontals often swamps useful signals. For more information on the station location and consequent noise problems, please see ASL1996:028. END **************************************************************************** DATA PROBLEM REPORT ASL2005:063 2005/05/05 ASL DCC Valerie Peyton ASL SDV IU */* 2005,123,23:14:00 2005,125,11:36:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 454 Timing MAY be in error, as GPS system is not operating consistently. The GPS system at SDV was not able to obtain a solid lock on the GPS satellites during this time. This caused the GPS system to not operate consistently, and produced timing jumps. Data should be used with caution. END PROBLEM RESOLUTION REPORT ASL2005:063 2005/05/06 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The SDV GPS system obtained a solid lock on the satellite signal at 2005, 125, 11:36. Timing quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT HRV1997:029 1997/11/14 Harvard WQC N.Maternovskaya SPYDER SSPA IU LHE LHV LHZ 1997,313,22:56:00 1997,313,22:56:00 Problem Description INVALID RESPONSE (factor 0f 4) Postscript file was placed into /pub/qc/qc_ps. END PROBLEM RESOLUTION REPORT HRV1997:029 1997/11/25 ASL DCC Tyler Storm Description of Problem Resolution COMMENT Yes, the current response is incorrect. With the previous system, 1sps data was taken from stage six of the Quanterra. In this configuration, the gain of the 1sps data is the same as with the 20sps. Currently, we are running a configuration where 1sps data are derived from the 20sps data, with a X4 gain step added. However, we failed to add this change to the dataless SEED data base. We will have the correct response posted within a week. (Ed. note: This is from 11/25/97) END **************************************************************************** DATA PROBLEM REPORT ASL2005:064 2005/05/06 ASL DCC Valerie Peyton ASL KMBO IU 00/*HN 2005,065,01:30:00 2005,146,13:16:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4620 Incorrect instrument response for low frequencies only The N component of the STS1 at KMBO has developed either a noise problem or a response problem. From 0.33 Hz to 0.05 Hz the response is 2dB to 7dB too low. From 0.05 Hz down through the low frequencies, the response is 2dB to 27dB too high. The high frequencies (about 0.33 Hz) appear to be unaffected. Lower- frequency data should be used with caution. END PROBLEM RESOLUTION REPORT ASL2005:064 2005/05/26 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The KMBO station operator recentered the STS1 N. This fixed the response problem. Data quality returns to normal 2005, 146, 13:16. END **************************************************************************** DATA PROBLEM REPORT HRV1997:020 1997/06/06 Harvard WQC N.Maternovskaya ASL KMBO IU *HE *HN 00/*HE 00/*HN 10/*HE 10/*HN 1996,337,22:17:00 1996,337,22:17:00 Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE C 4500 Channel has high noise background. Postscript file was placed into /pub/qc/qc_ps. END PROBLEM RESOLUTION REPORT HRV1997:020 2000/03/27 ASL DCC Valerie Peyton Description of Problem Resolution COMMENT Station KMBO indeed appears to have a high background level of low frequency noise. Looking through old data, it seems this is a characteristic of the site. The noise is more noticeable on the LH? data streams than on the BH? data streams. Unless the station is moved, this noise will persist. END **************************************************************************** DATA PROBLEM REPORT HRV1997:021 1997/06/18 Harvard WQC N.Maternovskaya ASL ANMO IU BHW BHV BHU 1997,000,23:02:15 1997,000,23:02:15 Problem Description OTHER It looks like a digitizer problem. Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1997:021 2000/03/24 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The problem is not with the digitizer, so much as with the seismometer. The seismometer being recorded on the BHU/V/W channels at ANMO was disconnected at 1997,022,16:22 so it could be shipped to a station that needed it. Unfortunately, data acquisition on the BHU/V/W channels continued for about a day after the seismometer was removed. END **************************************************************************** DATA PROBLEM REPORT ASL2005:072 2005/05/19 ASL DCC Valerie Peyton ASL KBS IU 10/*HN 10/*HE 2005,090,16:08:00 2005,110,12:36:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The horizontal components of the STS2 at KBS have fallen against their stops. For the first couple of days, large events are still visible. After that, data are unuseable. END PROBLEM RESOLUTION REPORT ASL2005:072 2005/05/19 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The KBS station operator recentered the STS2 at 2005, 110, 12:36. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ANSS2006:062 2006/12/05 ANSS DCC leo ANSS CBKS US ?H? 2006,326,03:55:00 2006,326,03:55:00 Problem Description OTHER SEED COMMENT REFERENCE S 2501 Data unusable. CBKS/ Instrument drifted to stops: 2006,326,03:55 Data UnUseable END **************************************************************************** DATA PROBLEM REPORT ASL2005:073 2005/05/19 ASL DCC Valerie Peyton ASL KBS IU 10/*HZ 2005,090,16:09:00 2005,093,02:21:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The Z component of the STS2 at KBS has fallen against one of its stops. Large events are visible, but data should be used with caution. END PROBLEM RESOLUTION REPORT ASL2005:073 2005/05/19 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The Z component of the STS2 at KBS came away from its stop sufficiently far for data quality to return to normal at 2005, 093, 02:21. END **************************************************************************** DATA PROBLEM REPORT ANSS2006:061 2006/12/01 ANSS DCC leo ANSS AAM US ?H? 2006,307,18:26:00 2006,307,18:26:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE S 2501 Data unusable. NLWA/ Instrumet drifted to STOP 2006,307,18:26 Also Excessive gapping noted END **************************************************************************** DATA PROBLEM REPORT ASL2005:070 2005/05/19 ASL DCC Valerie Peyton ASL MA2 IU */* 2005,067,08:34:00 2005,079,23:23:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 454 Timing MAY be in error, as GPS system is not operating consistently. The GPS system at MA2 was not able to obtain a solid lock on the GPS satellites during this time. Timing quality should be considered suspect, and data should be used with caution. END PROBLEM RESOLUTION REPORT ASL2005:070 2005/05/19 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The MA2 GPS system obtained a solid lock on the satellite signal at 2005, 079, 23:23. Timing quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ANSS2006:060 2006/12/01 ANSS DCC leo ANSS LTX US ?H? 2006,314,17:05:00 2006,314,17:05:00 Problem Description OTHER LTX/ HORIZONTAL CHANNELS ON THE STOPS INSTRUMENT PROBLEM NO HORIZONTAL DATA END **************************************************************************** DATA PROBLEM REPORT ASL2005:071 2005/05/19 ASL DCC Valerie Peyton ASL MA2 IU */* 2005,119,08:58:00 2005,170,05:41:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 454 Timing MAY be in error, as GPS system is not operating consistently. The GPS system at MA2 was not able to obtain a solid lock on the GPS satellites during this time. Timing quality should be considered suspect, and data should be used with caution. NB: Because of a gap in the live data, we cannot at this time determine the precise start time of this problem. It may have started as early as 2005, 104, 00:00. The start time will be updated when the data tapes come in from the station. END PROBLEM RESOLUTION REPORT ASL2005:071 2005/06/20 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The MA2 station operator fixed the GPS clock problem. Timing quality returns to normal at 2005, 170, 05:41. END **************************************************************************** DATA PROBLEM REPORT ANSS2006:064 2006/12/05 ANSS DCC leo ANSS DGMT US ?H? 2006,326,18:37:00 2006,335,13:35:00 Problem Description OTHER SEED COMMENT REFERENCE S 2515 Data dropouts DGMT/ No Data Available 2006,326,18:37->335,13:35 END **************************************************************************** DATA PROBLEM REPORT ANSS2006:063 2006/12/05 ANSS DCC leo ANSS CNNC US ?H? 2006,329,21:30:00 2006,332,02:35:00 Problem Description OTHER SEED COMMENT REFERENCE S 2501 Data unusable. CNNC/ Instrument drift to stops 2006,329,21:30 -> 332, 02:35 Data also has many gaps END **************************************************************************** DATA PROBLEM REPORT HRV1997:034 1998/01/06 Harvard WQC N.Maternovskaya ASL PAB IU LHN, BHN 1997,190,19:24:00 1997,190,19:24:00 Problem Description OTHER Strange LP "precursor" before impulsive P. Postscript file was placed into /pub/qc/qc_ps. END PROBLEM RESOLUTION REPORT HRV1997:034 2000/03/17 ASL DCC Valerie Peyton Description of Problem Resolution COMMENT Reviewing the data from PAB for 1997,190 it is apparent that both horizontal channels are prone to long period swings that last about 400-500 seconds and are of moderate amplitude. These swings are non-periodic and occur once every few hours. They do not occur on both horizontal channels at the same time. They are not currently a problem, and do not appear to require further action. END **************************************************************************** DATA PROBLEM REPORT ASL2005:078 2005/05/27 ASL DCC Valerie Peyton ASL KEV IU */* 2005,104,18:47:00 2005,105,20:28:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 451 Timing MAY be in error, as clock is unlocked. The GPS system at KEV has lost contact with the GPS satellite system. Timing is ambiguously incorrect as the system tries to keep time without the help of the GPS standard. END PROBLEM RESOLUTION REPORT ASL2005:078 2005/05/27 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION ASL field personnel were able to remotely reset the KEV GPS system. This action enabled the GPS system to re-establish contact with the GPS satellite system. Timing quality returns to normal at 2005, 105, 20:28. END **************************************************************************** DATA PROBLEM REPORT ASL2005:079 2005/05/31 ASL DCC Tyler Storm ASL TEIG IU 10/?HZ 2005,147,20:49:00 2005,162,00:13:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. Channels from the CMG3-T are dead at 2005,147,20:49:00. END PROBLEM RESOLUTION REPORT ASL2005:079 2005/06/13 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The Z component of the CMG3-T-B at TEIG was recentered. Data quality returns to normal at 2005, 162, 00:13. END **************************************************************************** DATA PROBLEM REPORT HRV1997:037 1998/01/06 Harvard WQC N.Maternovskaya ASL WVT IU LHN, LHE, BHN, BHE, ?HN, ?HE, ?HZ 1997,210,12:00:00 1997,210,12:00:00 Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE C 4500 Channel has high noise background. Postscript file was placed into /pub/qc/qc_ps. END PROBLEM RESOLUTION REPORT HRV1997:037 2000/03/17 ASL DCC Valerie Peyton Description of Problem Resolution COMMENT Station WVT is located in a high background noise area. The noise seen on days 1997,210 - 1997,256 is worse than usual, and mostly goes away at the SUPPLEMENT this station, please also see ASL2000:069. END **************************************************************************** DATA PROBLEM REPORT ASL2005:076 2005/05/24 ASL DCC Valerie Peyton ASL RSSD IU 10/*H* 2005,144,02:27:00 2005,154,01:13:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. All three channels of the STS2 at RSSD are producing raw digitizer noise. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2005:076 2005/06/03 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION Data are back to nomal at 2005,154,01:13:00. END **************************************************************************** DATA PROBLEM REPORT ASL2005:077 2005/05/26 ASL DCC Valerie Peyton ASL KMBO IU */* 2005,144,14:28:00 2005,144,14:28:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 454 Timing MAY be in error, as GPS system is not operating consistently. KMBO has a timing problem during this time. Timing quality should be considered suspect, and data should be used with caution. SUPPLEMENT 2005, 188 The clock problem at KMBO has been caused by the theft of the GPS antenna. Timing is completely incorrect. We have shipped a replacement antenna and a longer cable, to hopefully elevate the antenna above the level of convenient theft. END **************************************************************************** DATA PROBLEM REPORT ASL2005:074 2005/05/20 ASL DCC Valerie Peyton ASL COR IU */* 2004,021,04:05:00 2004,021,19:24:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 450 Time Uncertain. The COR data acquisition system is generating messages which indicate the system is no longer capable of synchronizing timing across all channels. This means that, even though the system is receiving a clear signal and time stamp from the GPS system, channels may or may not have the same time stamp when they should. Time stamps should be considered useless until the problem can be fixed. END PROBLEM RESOLUTION REPORT ASL2005:074 2005/05/20 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The COR timing problem was solved by resetting the DA. Thankfully, this happened just over 15 hours after the problem started. Timing quality returns to normal at 2004, 169, 11:57. END **************************************************************************** DATA PROBLEM REPORT ASL2005:075 2005/05/24 ASL DCC Valerie Peyton ASL GUMO IU */* 2005,132,16:26:00 2005,133,10:12:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 454 Timing MAY be in error, as GPS system is not operating consistently. GUMO has a timing problem during this time. Timing quality should be considered suspect, and data should be used with caution. END PROBLEM RESOLUTION REPORT ASL2005:075 2005/05/24 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The GPS system at GUMO returned to proper operation at 2005, 133, 10:12. Timing quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT HRV1997:030 1997/11/14 Harvard WQC N.Maternovskaya ASL YSS IU LHZ BHZ 1997,168,21:03:00 1997,168,21:03:00 Problem Description Long-period pulse (period=600c) follows P-wave onset. Postscript file was placed into /pub/qc/qc_ps. END PROBLEM RESOLUTION REPORT HRV1997:030 2000/03/22 ASL DCC Valerie Peyton Description of Problem Resolution COMMENT This long-period pulse is the first of two on the vertical component in a roughly 6 hour time span (1997,168,21:05 - 1997,169,03:44). The cause of the pulse has not been determined. Random long-period pulses were observed on the vertical component of the STS1 at YSS from 1996,182 to 1997,240. The cause and the cure have not been identified, but the problem appears to have ceased. For more information, please also see ASL1996:037. END **************************************************************************** DATA PROBLEM REPORT HRV1997:031 1998/01/02 Harvard WQC Ekstrom RAYN II VHZ,VHN,VHE 1998,001,06:00:00 1998,001,06:00:00 Problem Description Wrong sample rate. #SAC file gives sampling rate as 1/5 sec -- should be 1/10 sec. END PROBLEM RESOLUTION REPORT HRV1997:031 1998/01/07 IDA Peter Davis Description of Problem Resolution COMMENT I downloaded the SPYDER data in SAC format for this event and station and then inspected the headers using the listhdr function. My understanding of SAC is limited, but I believe the DELTA variable is the sample rate, and if so, the values in the header appear to be correct. Below is a listing of what I see with this function: FILE: rayn.vhe -------------- NPTS = 1920 B = 0.0000000e+00 E = 1.9190000e+04 IFTYPE = TIME SERIES FILE LEVEN = TRUE DELTA = 1.0000000e+01 IDEP = UNKNOWN DEPMIN = -4.6147100e+05 DEPMAX = -4.5975300e+05 DEPMEN = -4.6053012e+05 KZDATE = JAN 01 (001), 1998 KZTIME = 06:04:07.823 IZTYPE = BEGIN TIME KSTNM = RAYN FILE: rayn.vhn -------------- NPTS = 1920 B = 0.0000000e+00 E = 1.9190000e+04 IFTYPE = TIME SERIES FILE LEVEN = TRUE DELTA = 1.0000000e+01 IDEP = UNKNOWN DEPMIN = -6.7517000e+04 DEPMAX = -6.5686000e+04 DEPMEN = -6.6619445e+04 KZDATE = JAN 01 (001), 1998 KZTIME = 06:04:07.823 IZTYPE = BEGIN TIME KSTNM = RAYN FILE: rayn.vhz -------------- NPTS = 1920 B = 0.0000000e+00 E = 1.9190000e+04 IFTYPE = TIME SERIES FILE LEVEN = TRUE DELTA = 1.0000000e+01 IDEP = UNKNOWN DEPMIN = -1.2384600e+05 DEPMAX = -1.2316300e+05 DEPMEN = -1.2359100e+05 KZDATE = JAN 01 (001), 1998 KZTIME = 06:04:07.823 IZTYPE = BEGIN TIME KSTNM = RAYN END **************************************************************************** DATA PROBLEM REPORT HRV1997:032 1998/01/06 Harvard WQC N.Maternovskaya ASL BILL IU LHN LHE BHN BHE 1997,190,19:24:00 1997,190,19:24:00 Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE C 4500 Channel has high noise background. Postscript file was placed into /pub/qc/qc_ps. END **************************************************************************** DATA PROBLEM REPORT ANSS2006:059 2006/11/28 ANSS DCC leo ANSS BINY US ?H? 2006,315,12:52:00 2006,320,18:15:00 Problem Description OTHER SEED COMMENT REFERENCE S 2501 Data unusable. BINY/ Instruemt drifted to stops 2006,315,12:52->320,18:15 END **************************************************************************** DATA PROBLEM REPORT ANSS2006:057 2006/11/08 ANSS DCC leo ANSS HDIL US ?H? 2006,300,01:15:00 2006,311,22:58:00 Problem Description VERY LARGE PULSE SEED COMMENT REFERENCE S 2501 Data unusable. HDIL/ Instrumet drift to stopps NO DATA 2006,300,01:15->311,22:58 END **************************************************************************** DATA PROBLEM REPORT ANSS2006:056 2006/11/08 ANSS DCC leo ANSS ECSD US ?H? 2006,301,00:22:00 2006,311,16:04:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE S 2515 Data dropouts ECSD/ NO DATA 2006,301,00:22->311,16:04 END **************************************************************************** DATA PROBLEM REPORT ANSS2006:051 2006/10/27 ANSS DCC leo ANSS DGMT US ?H? 2006,275,23:52:00 2006,291,00:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 2504 Little or no data available. NO HR_channels available? reason unknown. 2006,275,23:52->291,00:00 END **************************************************************************** DATA PROBLEM REPORT ANSS2006:050 2006/10/13 ANSS DCC leo ANSS CNNC US ?H? 2006,244,04:37:00 2006,285,20:24:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE S 2515 Data dropouts CNNC/ NO DATA telemetry problems: 2006,244,04:37 -> 285,20:24 (41.5 days) END **************************************************************************** DATA PROBLEM REPORT ANSS2006:055 2006/11/08 ANSS DCC leo ANSS KVTX US ?H? 2006,292,14:11:00 2006,311,16:03:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE S 2507 Station down. KVTX/ No DATA for 2006,292,14:11-> 311,16:03 END **************************************************************************** DATA PROBLEM REPORT ANSS2006:054 2006/11/08 ANSS DCC leo ANSS ISCO US ?H? 2006,295,14:18:00 2006,295,14:18:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE S 2515 Data dropouts ISCO/ 2006,295,14:18 Excessive gaps all channels END **************************************************************************** DATA PROBLEM REPORT ANSS2006:053 2006/11/08 ANSS DCC leo ANSS AAM US ?H? 2006,291,04:03:00 2006,291,04:03:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE S 2501 Data unusable. CBKS/ 2006,291,04:03 Drift to Stops END **************************************************************************** DATA PROBLEM REPORT ANSS2006:052 2006/10/27 ANSS DCC leo ANSS JCT US ?H? 2006,285,15:00:00 2006,285,15:00:00 Problem Description OTHER SEED COMMENT REFERENCE S 2515 Data dropouts Excessive data gaps at JCT/ 2006,285,15:00 Cause Unknown END **************************************************************************** DATA PROBLEM REPORT ANSS2006:048 2006/10/11 ANSS DCC leo ANSS PKME US ?H? 2006,237,17:47:00 2006,278,20:17:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE S 2515 Data dropouts PKME/ Data dropouts all Channels as Noted: 2006,237,17:47->249,16:16 (11.9days) 2006,262,00:06->263,14:19 (1.6days) 2006,266,15:39->278,20:17 (12.2days) Telemetry Problems Noted. END **************************************************************************** DATA PROBLEM REPORT ANSS2006:047 2006/10/11 ANSS DCC leo ANSS ECSD US ?H? 2006,251,00:00:00 2006,261,00:00:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE C 2504 Little or no data available. Telemetry problems 2006,251->261 HR channel excessive gaps only 2 days of data END **************************************************************************** DATA PROBLEM REPORT ANSS2006:046 2006/09/27 ANSS DCC leo ANSS KVTX US ?H? 2006,257,13:12:00 2006,262,21:30:00 Problem Description OTHER KVTX/- STS-2 Drift toward stops Data Unuseable 2006,257,13:12->262,21:30 (5.4days) DATA PROBLEM REPORT ANSS2006:045 2006/09/26 ANSS DCC leo ANSS BOZ US ?H? 2006,252,23:28:00 2006,257,15:17:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE S 2515 Data dropouts No DATA 2006,252,23:28->257,15:17 END **************************************************************************** DATA PROBLEM REPORT ANSS2006:049 2006/10/11 ANSS DCC leo ANSS EYMN US ?H? 2006,275,22:04:00 2006,278,12:30:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE S 2515 Data dropouts Data Dropouts Noted: 2006,275,22:04->278,12:30 (2.6days). END **************************************************************************** DATA PROBLEM REPORT ANSS2006:040 2006/09/18 ANSS DCC leo ANSS CNNC US ?H? 2006,244,04:38:00 2006,244,04:38:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE S 2507 Station down. Data Stopped 2006,244,04:38 END **************************************************************************** DATA PROBLEM REPORT ANSS2006:044 2006/09/25 ANSS DCC Tyler Storm ANSS TGUH CU * 2006,266,02:45:00 2006,266,02:45:00 Problem Description OTHER Masses are "pegged" on the STS2. Data are unuseable. END PROBLEM RESOLUTION REPORT ANSS2006:044 2006/09/25 ANSS DCC Tyler Storm Description of Problem Resolution RESOLUTION Instrument was centered at 2006,268,13:26. Data quality is back to normal for this station. END **************************************************************************** DATA PROBLEM REPORT ANSS2006:043 2006/09/18 ANSS DCC leo ANSS PKME US ?H? 2006,237,17:45:00 2006,237,17:45:00 Problem Description OTHER SEED COMMENT REFERENCE S 2507 Station down. PKME/ Telemetry problem; NO DATA 2006,237,17:45->249,16:05 END PROBLEM RESOLUTION REPORT ANSS2006:043 2006/09/18 ANSS DCC leo Description of Problem Resolution RESOLUTION PKME/ Telemetry problem resolved PKME/ Back online 2006,249,16:05 END **************************************************************************** DATA PROBLEM REPORT ANSS2006:042 2006/09/18 ANSS DCC leo ANSS NEW US ?H? 2006,240,14:56:00 2006,250,14:45:00 Problem Description OTHER SEED COMMENT REFERENCE S 2507 Station down. NEW/ Station telemetry problem; NO DATA 2006, 240,14:56->2006, 250,14:45 END PROBLEM RESOLUTION REPORT ANSS2006:042 2006/09/18 ANSS DCC leo Description of Problem Resolution RESOLUTION NEW/ Station telemetry problem resolved NEW/ back online 2006,250,14:45 END **************************************************************************** DATA PROBLEM REPORT ANSS2006:041 2006/09/18 ANSS DCC leo ANSS DGMT US ?H? 2006,115,08:05:00 2006,115,08:05:00 Problem Description OTHER SEED COMMENT REFERENCE S 2507 Station down. DGMT/ back online 2006,250,22:10 has been down for the period noted: 2006,115,08:05 -> 2006,250,22:10 END PROBLEM RESOLUTION REPORT ANSS2006:041 2006/09/18 ANSS DCC leo Description of Problem Resolution RESOLUTION DGMT/ telemetry problem has been resolved, back online 2006,250,22:10 END **************************************************************************** DATA PROBLEM REPORT ANSS2006:037 2006/08/30 ANSS DCC leo ANSS WUAZ US ?H? 2005,174,20:00:00 2005,260,00:00:00 Problem Description DATA LOGGER PROBLEM SEED COMMENT REFERENCE S 2507 Station down. NO DATA for the period noted: 2005,174,20:00 -> 2005,260,00:00. END **************************************************************************** DATA PROBLEM REPORT ANSS2006:036 2006/08/29 ANSS DCC leo ANSS PKME US ?H? 2006,187,11:00:00 2006,187,11:00:00 Problem Description DATA GLITCHES SEED COMMENT REFERENCE C 2516 Systematic long period pulses Pulses are noted on ALL channels but are most evident on the N-S. These are caused by water well pump that is very near the PKME vault. These Pulses should stop when the Park closes for the winter season. END **************************************************************************** DATA PROBLEM REPORT ANSS2006:035 2006/08/29 ANSS DCC leo ANSS PKME US ?H? 2006,187,11:00:00 2006,201,00:00:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE C 2504 Little or no data available. Excessive Data Dropouts for the period NOTED: 2006,187,11:00->2006,201,00:00. END **************************************************************************** DATA PROBLEM REPORT ANSS2006:034 2006/08/29 ANSS DCC leo ANSS SCIA US ?H? 2006,188,07:00:00 2006,218,03:00:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE C 2504 Little or no data available. Large Gaps in time series as Noted: 2006,188,07:00->2006,218,03:00 END **************************************************************************** DATA PROBLEM REPORT ANSS2006:039 2006/08/30 ANSS DCC leo ANSS WVOR US ?H? 2005,203,12:00:00 2005,207,11:00:00 Problem Description DATA GLITCHES Instrument Re Leveling during the period noted: 2005,203,12:00 -> 2005,207,11:00 many Re Level commands to the instrument during this period. Data is noisy. END **************************************************************************** DATA PROBLEM REPORT ANSS2006:038 2006/08/30 ANSS DCC leo ANSS WVOR US ?H? 2005,157,00:00:00 2005,181,00:00:00 Problem Description DIGITIZER PROBLEM SEED COMMENT REFERENCE S 2507 Station down. NO DATA for the period noted: 2005,157,00:00 -> 2005,181,00:00. END **************************************************************************** DATA PROBLEM REPORT ANSS2006:033 2006/08/29 ANSS DCC leo ANSS WMOK US ?H? 2005,188,00:00:00 2005,274,00:00:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE C 2504 Little or no data available. US_WMOK NO DATA during the following dates NOTED: 188,00->214,00 233,00->238,00 241,00->249,00 260,00->274,00. END **************************************************************************** DATA PROBLEM REPORT ANSS2006:032 2006/08/29 ANSS DCC leo ANSS TZTN US ?H? 2005,155,00:00:00 2005,188,00:00:00 Problem Description DIGITIZER PROBLEM SEED COMMENT REFERENCE S 2507 Station down. No Data for the time period noted: 2005,155,00:00 -> 2005,188,00:00 END **************************************************************************** DATA PROBLEM REPORT ANSS2006:031 2006/08/29 ANSS DCC leo ANSS TPNV US ?H? 2005,071,00:00:00 2005,292,20:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE S 2501 Data unusable. TPNV NO USEABLE Data for the period noted; 2005,071 -> 2005,292,20:00 Data sets discarded. END **************************************************************************** DATA PROBLEM REPORT ANSS2006:030 2006/08/28 ANSS DCC leo ANSS OCWA US ?H? 2005,260,03:00:00 2005,283,01:00:00 Problem Description DIGITIZER PROBLEM SEED COMMENT REFERENCE S 2507 Station down. NO DATA for the period noted: 2005,260,03:00 -> 2005,283,01:00 Station Down END **************************************************************************** DATA PROBLEM REPORT ANSS2006:026 2006/08/23 ANSS DCC leo ANSS MIAR US ?H? 2005,136,00:00:00 2006,116,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE C 2504 Little or no data available. Tilt problem at MIAR and Excessive gaps in data DATA Not USEABLE 2005,136 -> 2006,116 New MC vault installed at MIAR. END **************************************************************************** DATA PROBLEM REPORT ANSS2006:025 2006/08/23 ANSS DCC leo ANSS MCWV US ?H? 2005,260,03:37:00 2005,260,03:37:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE S 2507 Station down. NO DATA from MCWV 2005,260->272,18:00 Back OnLine 2005,272,18:00 END **************************************************************************** DATA PROBLEM REPORT ANSS2006:024 2006/08/23 ANSS DCC leo ANSS MCWV US ?HN 2005,136,00:00:00 2005,136,00:00:00 Problem Description OTHER Long period Drift on N_S component can still see ground motion. END **************************************************************************** DATA PROBLEM REPORT ANSS2006:023 2006/08/18 ANSS DCC leo ANSS KSU1 US ?HE 2005,221,08:48:00 2005,221,08:48:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 2504 Little or no data available. STS-2 E/W channel died 2005,221 08:48 till station upgrade to Borehole 2006 NO E/W data 2005,221,08:48->2006,050,23:00 END **************************************************************************** DATA PROBLEM REPORT ANSS2006:029 2006/08/28 ANSS DCC leo ANSS NHSC US ?H? 2005,259,18:00:00 2005,301,18:36:00 Problem Description DATA LOGGER PROBLEM SEED COMMENT REFERENCE S 2507 Station down. NO Data for the period noted: 2005, 259, 18:00 -> 2005,301,18:36 Station Down. END **************************************************************************** DATA PROBLEM REPORT ANSS2006:028 2006/08/23 ANSS DCC leo ANSS MSO US ?H? 2005,260,02:30:00 2005,267,23:20:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE C 2504 Little or no data available. NO Data from MSO during this time 2005,260,02:30 -> 2005,267,32:20 7.9days END **************************************************************************** DATA PROBLEM REPORT ANSS2006:027 2006/08/23 ANSS DCC leo ANSS MNV US ?H? 2005,147,00:00:00 2005,256,00:00:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE S 2515 Data dropouts Data Gaps at MNV 2005,147 -> 256,00:00 BH? data has gaps in all time series. 2005,281 19:30 -> 286,00:00 No DATA, END **************************************************************************** DATA PROBLEM REPORT ANSS2006:022 2006/08/18 ANSS DCC leo ANSS JFWS US ?H? 2005,176,05:00:00 2005,230,12:00:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE C 2504 Little or no data available. No DATA Available from JFWS 2005,176,05:00 ->2005,230,12:00 END **************************************************************************** DATA PROBLEM REPORT ANSS2006:021 2006/08/18 ANSS DCC leo ANSS JCT US ?H? 2005,161,00:00:00 2005,161,00:00:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE C 2504 Little or no data available. No DATA or Ecessive Gaps from 2005,161,00:00 ->2005,215,15:00 Also 1.2 day gap noted: 2005,219,08:21->220,13:47 END **************************************************************************** DATA PROBLEM REPORT ANSS2006:020 2006/08/18 ANSS DCC leo ANSS ISCO US ?H? 2005,202,11:17:00 2005,202,11:17:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE C 2504 Little or no data available. No Data Available from ISCO 2005, 202,11:17 to 2005, 214,00:21 3 day gap also noted 2005,260,03:00 for 3.3days ->2005, 263, 09:00 and Excessive Gaps for 24 hours all channels 2005,272,12:51 ->273,13:00. END **************************************************************************** DATA PROBLEM REPORT IDA2002:003 2002/01/28 IDA DCC Peter Davis IDA KAPI II BH*-10 2001,129,03:23:00 2001,129,03:23:00 Problem Description DEAD CHANNEL The data streams from the CMG-3T failed on the above date. END PROBLEM RESOLUTION REPORT IDA2002:003 2006/01/12 IDA Erik Klimczak Description of Problem Resolution RESOLUTION The data streams for the CMG-3T seismometer were restored when IDA engineers visited the site and replaced the CMG-3T seismometer. END **************************************************************************** DATA PROBLEM REPORT IDA2002:002 2002/01/28 IDA DCC Peter Davis IDA FFC II *** 2001,256,21:38:2001.354 2001,256,21:38:2001.354 Problem Description DATA LOGGER PROBLEM The DAS' RT303 card digitizing data from the EW component of the STS1 began failing on the above date. This card was diagnosed as the source of the problems recording data at the station and was replaced on 2001,354. END **************************************************************************** DATA PROBLEM REPORT IDA2002:001 2002/01/28 IDA DCC Peter Davis IDA CMLA II BHN,LHN,VHN 2001,284,16:14:00 2001,284,16:14:00 Problem Description DATA LOGGER PROBLEM The DAS' RT303 card digitizing data from the NS component of the KS54000 failed on the above date. This disrupted the timing on all other channels, so all data from CMLA was withheld until 2001,327-14:54 when the problematic board was removed and the system, reset. A replacement card has been shipped to the station. END PROBLEM RESOLUTION REPORT IDA2002:001 2002/07/10 IDA Peter Davis Description of Problem Resolution RESOLUTION Acquisition of bhn,lhn and vhn was restored on 2002,046-11:29 when the RT303 board was replaced. END **************************************************************************** DATA PROBLEM REPORT IDA2002:007 2002/04/02 IDA DCC Peter Davis IDA KURK II *** 2001,361,03:01:00 2002,042,02:53:00 Problem Description DATA LOGGER PROBLEMS The communications board within the DAS failed completely on the above date causing loss of data acquisition. Data acquisition was spotty from 2001,351 to 2001,361 as the board began to fail. The problem was solved with the replacement of the board on 2002,042. END **************************************************************************** DATA PROBLEM REPORT ANSS2006:015 2006/08/08 ANSS DCC leo ANSS GOGA US ?H? 2005,136,00:00:00 2005,232,00:00:00 Problem Description OTHER Instrument Drift and Gaps. 2005, 136 to 232. Instrument ReCentered 2005,232,00:00 END **************************************************************************** DATA PROBLEM REPORT IDA2002:006 2002/03/05 IDA DCC Peter Davis IDA PALK II BH*00,LH*00,VH*00 2002,008,11:34:00 2002,008,11:34:00 Problem Description LOW FREQUENCY NOISE A series of long period transients of varying duration and spaced at one day intervals began on the above date. The nature of the signal is similar to a 5mV RC input with a 40 minute time constant. Their source is believed to originate in the battery recharge system. The station is exposed to brownouts to the mains power on a daily basis, which activates the battery recharger. The circuitry of the integrated power system at the station is being re-evaluated in light of these signals. END PROBLEM RESOLUTION REPORT IDA2002:006 2003/09/09 IDA Erik Klimczak Description of Problem Resolution On 2003,064, the main power system at PALK was altered to accept input from a new solar power array rather than from mains power, which was proving to be unreliable. This reduces the dependency on the battery recharge system, which was inducing low frequency noise in the recording system. END **************************************************************************** DATA PROBLEM REPORT ANSS2006:014 2006/08/08 ANSS DCC leo ANSS EYMN US ?H? 2005,171,04:00:00 2005,266,18:00:00 Problem Description DIGITIZER PROBLEM SEED COMMENT REFERENCE S 2507 Station down. Station Down END **************************************************************************** DATA PROBLEM REPORT IDA2002:005 2002/01/28 IDA DCC Peter Davis IDA PALK II *** 2001,221,14:15:00 2001,221,14:15:00 Problem Description DATA LOGGER PROBLEM Data acquisition to the station was lost on the above date due to a failure of the power system. END **************************************************************************** DATA PROBLEM REPORT ANSS2006:013 2006/08/08 ANSS DCC leo ANSS ERPA US ?H? 2005,151,00:00:00 2005,256,00:00:00 Problem Description DATA LOGGER PROBLEM SEED COMMENT REFERENCE S 2507 Station down. Station Down END **************************************************************************** DATA PROBLEM REPORT IDA2002:004 2002/01/28 IDA DCC Peter Davis IDA KAPI II *** 2001,166,20:17:00 2002,015,00:00:00 Problem Description DATA LOGGER PROBLEM Data acquisition to the station was lost on the above date due to a failure of the power system. An engineer visited the site and restored data acquisition on 2002,015. END **************************************************************************** DATA PROBLEM REPORT ANSS2006:012 2006/08/07 ANSS DCC leo ANSS MIAR US ?H? 2006,213,03:45:00 2006,213,03:45:00 Problem Description OTHER SEED COMMENT REFERENCE S 2501 Data unusable. Mass Position Drift 2006,213,03:45 to 2006,216,18:38 END **************************************************************************** DATA PROBLEM REPORT ANSS2006:019 2006/08/08 ANSS DCC leo ANSS MVCO US ?H? 2006,108,00:00:00 2006,108,00:00:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE S 2515 Data dropouts Lots of Data Dropouts 2006,173,23:00 System Failure Data Droputs and Q330 ReStarts END PROBLEM RESOLUTION REPORT ANSS2006:019 2006/10/11 ANSS DCC leo Description of Problem Resolution RESOLUTION MVCO/ Station Back On Line 2006, 270, 06:44 END **************************************************************************** DATA PROBLEM REPORT ANSS2006:018 2006/08/08 ANSS DCC leo ANSS LTX US ?HN ?HE 2006,189,00:00:00 1900,000,00:00:00 1900,000,00:00:00 Problem Description DATA GLITCHES SEED COMMENT REFERENCE C 2512 Data spiky and possibly asymmetric. Data Spikes on N and E components Coherent Noise END **************************************************************************** DATA PROBLEM REPORT IDA2002:009 2002/07/10 IDA DCC Peter Davis IDA PALK II BHZ-00,LHZ-00,VHZ-00 2002,168,03:47:00 2002,168,03:47:00 Problem Description DATA LOGGER PROBLEMS The RT303 A2D board in the data logger is not functioning. END **************************************************************************** DATA PROBLEM REPORT ANSS2006:017 2006/08/08 ANSS DCC leo ANSS GOGA US ?H? 2006,104,00:00:00 2006,205,12:46:00 Problem Description OTHER SEED COMMENT REFERENCE S 2515 Data dropouts Digitizer Open Input 2006,104,00:00 to 2006,205,12:46 Excessive Data Gaps 171 instrument installed to 205. END **************************************************************************** DATA PROBLEM REPORT IDA2002:008 2002/04/25 IDA DCC Peter Davis IDA PFO II LNZ-00 2002,008,00:04:00 2002,114,20:09:00 Problem Description DATA LOGGER PROBLEMS The A2D board on the SAN2012 was not functioning properly and was replaced on the above date. Data acquisition is now normal. END **************************************************************************** DATA PROBLEM REPORT ANSS2006:016 2006/08/08 ANSS DCC leo ANSS GOGA US ?H? 2005,268,19:51:00 2005,283,00:00:00 Problem Description OTHER Mass Drift to stop Instrument ReCentered 2005,283,05:00 No Usable Data END **************************************************************************** DATA PROBLEM REPORT ANSS2006:011 2006/08/07 ANSS DCC leo ANSS WVOR US ?H? 2006,216,17:20:00 2006,216,17:20:00 Problem Description OTHER Mass Drifting Need Re Center. END **************************************************************************** DATA PROBLEM REPORT ANSS2006:010 2006/05/08 ANSS DCC leo ANSS ACSO US ALL 2005,136,00:00:00 2005,136,00:00:00 Problem Description SPIKES SEED COMMENT REFERENCE S 4002 Data unusable. Spike and Data Gaps END PROBLEM RESOLUTION REPORT ANSS2006:010 2006/05/08 ANSS DCC leo Description of Problem Resolution RESOLUTION Data Drops and Spikes stopped 05,256,00:00 END **************************************************************************** DATA PROBLEM REPORT IDA2002:010 2002/07/10 IDA DCC Peter Davis IDA MBAR II BHZ-00,LHZ-00,VHZ-00 2002,066,15:21:00 2002,066,15:21:00 Problem Description DATA LOGGER PROBLEMS The RT303 A2D board in the data logger for recording channels from the vertical component of the KS54000 is not functioning. END **************************************************************************** DATA PROBLEM REPORT IDA2002:014 2002/07/10 IDA DCC Peter Davis IDA JTS II ***-** 2002,146,08:15:00 2002,146,08:15:00 Problem Description DATA LOGGER PROBLEMS The main RT303 A2D board in the data logger has failed and caused all data acquisition to cease. The operator has been in contact and been given an interim solution. IDA engineers will visit the site shortly to replace a number of pieces of equipment at the station. END PROBLEM RESOLUTION REPORT IDA2002:014 2002/12/04 IDA Peter Davis Description of Problem Resolution RESOLUTION The problem was resolved on 9/4/02 (2002,247) when the defective board was replaced during a site visit to upgrade to MK7-ISP. END **************************************************************************** DATA PROBLEM REPORT IDA2002:013 2002/07/10 IDA DCC Peter Davis IDA KAPI II BHZ-00,LHZ-00,VHZ-00 2002,149,05:01:00 2002,149,05:01:00 Problem Description DATA LOGGER PROBLEMS The RT303 A2D board in the data logger for recording channels from the north-south component of the KS54000 is not functioning. END PROBLEM RESOLUTION REPORT IDA2002:013 2006/01/12 IDA Erik Klimczak Description of Problem Resolution RESOLUTION The North-South channels from the KS-54000 seismometer were restored after IDA engineers repaired the DC-DC converter in the AFU power supply, and other components damaged by power surges. END **************************************************************************** DATA PROBLEM REPORT IDA2002:011 2002/07/10 IDA DCC Peter Davis IDA MBAR II BHE-00,LHE-00,VHE-00 2002,102,09:22:00 2002,102,09:22:00 Problem Description DATA LOGGER PROBLEMS The RT303 A2D board in the data logger for recording channels from the east-west component of the KS54000 is not functioning. END **************************************************************************** DATA PROBLEM REPORT ANSS2006:004 2006/03/07 ANSS DCC Mark Meremonte ANSS TPNV US ALL 2005,001,00:00:00 2006,001,00:00:00 Problem Description OTHER Calendar year of 2005: Station susceptible to short and long periods of down times; Cause(s): Weather conditions; Rain/Snow/Ice on dish; Power outage; VSAT communication difficulties; Other out of our control conditions Extended down times of 1 day or more enumerated here: DDD+HH:MM to DDD+HH:MM UTC --------- --------- 001+00:00 -- 012+17:43 014+12;14 -- 067+00:20 071+19:25 -- 171+16:17 219+01:56 -- 292+20:21 END **************************************************************************** DATA PROBLEM REPORT IDA2002:017 2002/07/10 IDA DCC Peter Davis IDA AAK II ***-** 2002,051,06:15:00 2002,051,06:15:00 Problem Description DATA LOGGER PROBLEMS The power system for the station has failed. Spare parts were shipped to the operator, but their installation did not resolve the problem. We are sending a field team to the station in the near future. END **************************************************************************** DATA PROBLEM REPORT ANSS2006:003 2006/03/07 ANSS DCC Mark Meremonte ANSS TPNV US ALL 2004,001,00:00:00 2005,001,00:00:00 Problem Description OTHER Calendar year of 2004: Station susceptible to short and long periods of down times; Cause(s): Weather conditions; Rain/Snow/Ice on dish; Power outage; VSAT communication difficulties; Other out of our control conditions Extended down times of 1 day or more enumerated here: DDD+HH:MM to DDD+HH:MM UTC --------- --------- 363+19:00 -- 366+24+00 END **************************************************************************** DATA PROBLEM REPORT IDA2002:016 2002/07/10 IDA DCC Peter Davis IDA BRVK II ***-** 2002,168,02:59:00 2002,168,02:59:00 Problem Description DATA LOGGER PROBLEMS The power system for the station has failed. Spare parts have been shipped to the operator, and we are optimistic the station can be restored to operation soon. END **************************************************************************** DATA PROBLEM REPORT ANSS2006:002 2006/02/13 ANSS DCC leo ANSS MIAR US ALL 2005,286,00:00:00 2005,286,00:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE S 4002 Data unusable. Tilt effecting data Quality, END **************************************************************************** DATA PROBLEM REPORT IDA2002:015 2002/07/10 IDA DCC Peter Davis IDA COCO II ***-** 2002,135,00:00:00 2002,179,00:00:00 Problem Description INCORRECT TIME The clock at the station was not operating correctly on the above dates. The timing can be corrected by extrapolating internal drift for part of the effected period. The quality of the time is noted in IDA dataless SEED volume comments. END **************************************************************************** DATA PROBLEM REPORT ANSS2006:001 2006/02/13 ANSS DCC leo ANSS LRAL US ZALL 2005,315,00:00:00 2005,349,15:00:00 Problem Description NOISE SEED COMMENT REFERENCE S 4002 Data unusable. Data Un USABLE all Mass Drifted to STOPS. 315-349 Instrument Releveled and operational 05,349 15:04 END PROBLEM RESOLUTION REPORT ANSS2006:001 2006/02/13 ANSS DCC leo Description of Problem Resolution RESOLUTION LRAL Recentered and OPERATIONAL 05,349,15 END **************************************************************************** DATA PROBLEM REPORT ANSS2006:008 2006/04/06 ANSS DCC leo ANSS SDCO US BHZ 2006,074,02:32:00 2006,074,02:32:00 Problem Description DIGITIZER PROBLEM BHZ channel dead at 2006,074,02:32 utc END **************************************************************************** DATA PROBLEM REPORT ANSS2006:007 2006/03/09 ANSS DCC leo ANSS HLID US ALL 2006,034,00:00:00 2006,034,00:00:00 Problem Description DIGITIZER PROBLEM SEED COMMENT REFERENCE S 2515 Data dropouts Q330 Swppwed Data Process Problem. END **************************************************************************** DATA PROBLEM REPORT ANSS2006:006 2006/03/09 ANSS DCC leo ANSS BLA US ALL 2006,026,00:00:00 2006,026,00:00:00 Problem Description DIGITIZER PROBLEM SEED COMMENT REFERENCE S 2515 Data dropouts Excessive data Drop Outs Data UnUsable END **************************************************************************** DATA PROBLEM REPORT IDA2002:019 2002/07/10 IDA DCC Peter Davis IDA EFI II ***-** 2002,133,00:00:00 2002,133,00:00:00 Problem Description DATA GLITCHES The spread spectrum radio telemetry system connecting the ARS to the NRTS workstation is introducing glitches into all data streams. These glitches are not present in data recorded on tape and processed at the IDA DCC. New radios and cables have been shipped to the station and will be installed shortly. END **************************************************************************** DATA PROBLEM REPORT ANSS2006:005 2006/03/07 ANSS DCC Mark Meremonte ANSS AAM US ALL 2005,155,15:00:00 2005,215,00:00:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE S 2515 Data dropouts VSAT Communications: Q330 sites only Problem: UDP packets are dropped intermittently during transit where frequency of occurrence varies for each site and varies greatly from site to site. Resolution: Created a TCP/IP "tunnel" for the UDP packets to transmit through similar to a VPN without the encryption. END **************************************************************************** DATA PROBLEM REPORT IDA2002:021 2002/12/12 IDA DCC Peter Davis IDA EFI II BHE-10 2002,261,07:00:00 2002,329,12:39:00 Problem Description DEAD CHANNEL The mass hit the stops during this period. The problem was corrected by recentering the mass on day 329. END **************************************************************************** DATA PROBLEM REPORT IDA2002:020 2002/11/14 IDA DCC Peter Davis IDA SUR II BH*-10 2002,196,06:58:00 2002,301,07:00:00 Problem Description DATA LOGGER PROBLEM When EPROMs were replaced on the DAS DSP board, the board was reinserted into the DAS in the incorrect slot resulting in loss of data acquisition from the above channels. When the board was reseated, data acquisition returned to normal. END **************************************************************************** DATA PROBLEM REPORT ANSS2006:009 2006/05/08 ANSS DCC leo ANSS ACSO US ALL 2005,136,00:00:00 2005,136,00:00:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE C 9002 Little or no data available. Excess Gaps END **************************************************************************** DATA PROBLEM REPORT ASL2001:000 2001/01/04 ASL DCC Valerie Peyton ASL COLA IU 00/*HZ 00/*H1 2001,003,19:57:00 2001,003,23:20:00 Problem Description OTHER SEED COMMENT REFERENCE C 4332 Vertical and 1 (nominal N) inputs sqpped (ie, Z < = > 1). The input data cables for the KS5400 Z and nominal N (1) components were switched to test for the source of a noise problem on the Z component. >From 2001,003,19:57 to 2001,003,23:20 the COLA data labeled Z is actually nominal N (1) and the data labeled 1 is actually Z. The noise on the Z component moved with swapping the data inputs, indicating that there is a problem down hole. END PROBLEM RESOLUTION REPORT ASL2001:000 2001/01/04 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The KS5400 data input cables at COLA were returned to their proper configuration at 2001,003,23:20; Z and 1 component data are once more properly labeled. END **************************************************************************** DATA PROBLEM REPORT DMCQC2009:0009 2009/03/17 IRIS DMC Gillian Sharer DMC H07A TA *HZ 2006,227,23:28:00 2006,229,20:24:00 Problem Description DEAD CHANNEL During this time period, the Z channel recorded no seismic energy; noise only. END PROBLEM RESOLUTION REPORT DMCQC2009:0009 2009/03/17 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION After service, the Z channel began recording seismic data on 2006,229 20:24 UTC. END **************************************************************************** DATA PROBLEM REPORT ASL2001:009 2001/01/29 ASL DCC Tyler Storm ASL WCI IU *HN 2000,252,00:00:00 2001,227,20:12:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. Data from the N/S STS-1 are unusable. END PROBLEM RESOLUTION REPORT ASL2001:009 2002/05/14 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION Instrument was repaired 2001,227,20:12:00. END **************************************************************************** DATA PROBLEM REPORT DMCQC2009:0004 2009/02/02 IRIS DMC Gillian Sharer DMC Y26A TA * 2009,009,16:59:00 2009,014,23:32:00 Problem Description DATA DROPOUTS Multiple gaps limit data usability during this time period. END PROBLEM RESOLUTION REPORT DMCQC2009:0004 2009/02/02 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION Normal data flow resumed on day 014 23:32 UTC. END **************************************************************************** DATA PROBLEM REPORT ASL2001:007 2001/01/22 ASL DCC Valerie Peyton ASL BILL IU 00/*HN 2001,017,13:51:00 2001,024,14:50:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The north component of the STS-1 at BILL is against one of the stops. END PROBLEM RESOLUTION REPORT ASL2001:007 2001/01/25 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The north component of the STS-1 at BILL was recentered on 2001,024,14:50, and the data quality returned to normal. END **************************************************************************** DATA PROBLEM REPORT DMCQC2009:0003 2009/02/02 IRIS DMC Gillian Sharer DMC X24A TA ?HN 2008,341,03:26:00 2009,004,00:00:00 Problem Description INVALID RESPONSE During this time period, TA.X24A experienced an apparent differential output failure causing a sudden drop in DC offset and a reduced amplitudes on the N channel. END PROBLEM RESOLUTION REPORT DMCQC2009:0003 2009/02/02 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The DC offset and reduced amplitudes gradually drifted back to expected values over a period of weeks. As of day 004 2009, the station appears to be functioning normally again. END **************************************************************************** DATA PROBLEM REPORT ASL2001:008 2001/01/26 ASL DCC Valerie Peyton ASL ADK IU 00/*HZ 2001,005,05:39:00 2001,021,20:16:00 Problem Description NOISE SEED COMMENT REFERENCE C 4410 Channel data quality is poor. The Z component of the STS1 at ADK is plagued with long period noise and spiking during this time period. The frequency, amplitude and severity of the noise is variable throughout. END PROBLEM RESOLUTION REPORT ASL2001:008 2001/01/26 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Data quality for the Z component of the STS1 at ADK returns to normal near the end of 2001, 021. The source and solution of the problem are both unknown. END **************************************************************************** DATA PROBLEM REPORT DMCQC2009:0002 2009/02/02 IRIS DMC Gillian Sharer DMC BC3 CI * 2008,357,19:33:00 2008,363,17:47:00 Problem Description OTHER CI.BC3 masses neared the stops during this time period. Seismic data may be suspect. END PROBLEM RESOLUTION REPORT DMCQC2009:0002 2009/02/02 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION Ci.BC3 masses were recentered on day 363 17:47 UTC. END **************************************************************************** DATA PROBLEM REPORT ASL2001:005 2001/01/12 ASL DCC Tyler Storm ASL XMAS IU */* 2000,345,05:50:00 2000,363,10:37:00 Problem Description OTHER SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The STS-2 has lost mass capture. Data are degraded from 2000,345,05:50 to 2000,357,21:50 and unusable from 2000,351,09:08 to 2000,355,21:50. END PROBLEM RESOLUTION REPORT ASL2001:005 2001/01/12 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION Data are sometimes good and sometimes degraded between 2000,357,21:50 and 2000,363,10:37. END **************************************************************************** DATA PROBLEM REPORT DMCQC2009:0001 2009/01/16 IRIS DMC Mary Templeton DMC SRU UU EHZ 2009,015,18:00:00 2009,015,18:02:00 Problem Description OTHER The S-13 sensor and digitizer clipped intermittently during an Mw=7.4 Kuril Islands event. END PROBLEM RESOLUTION REPORT DMCQC2009:0001 2009/01/16 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION UU.SRU..EHZ resumed recording with fidelity after this event. END **************************************************************************** DATA PROBLEM REPORT ASL2001:006 2001/01/18 ASL DCC Valerie Peyton ASL SNZO IU 10/*HN 2001,018,11:45:00 2001,018,16:05:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The N component of the CMG3-T at SNZO is against the stops as of 2001, 018, 11:45. END PROBLEM RESOLUTION REPORT ASL2001:006 2001/01/18 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION ASL field engineers were able to remotely recenter the CMG3-T at SNZO. N data return to normal quality at 2001, 018, 16:05. END **************************************************************************** DATA PROBLEM REPORT DMCQC2009:0008 2009/03/17 IRIS DMC Gillian Sharer DMC G03A TA * 2006,265,18:28:00 2006,272,18:20:00 Problem Description DEAD CHANNEL VM1, VM2, VM3 were against the stops. G03A recorded no seismic energy during this time period. END PROBLEM RESOLUTION REPORT DMCQC2009:0008 2009/03/17 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION Sensor reinstalled and leveled. G03A resumed recording seismic data on 2006, 272 18:20 UTC. END **************************************************************************** DATA PROBLEM REPORT ASL2001:003 2001/01/05 ASL DCC Valerie Peyton ASL COLA IU 00/*HZ 2000,344,18:40:00 2001,026,12:00:00 Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE C 4504 Channel exibits high levels of low frequency noise. The Z component of the KS54000 at COLA is exhibiting excessive low frequency noise. This noise has appeared and subsequently disappeared before, and the source has never been identified. Remote tests done with the station operator's help have indicated the problem is either in the seismometer or in the data cable coming from the seismometer (see ASL2001:000). Until we can send a field engineer to the site or replace the instrument, we will simply have to wait and hope that the noise disappears on its own, as it has in the past. END PROBLEM RESOLUTION REPORT ASL2001:003 2001/01/29 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The Z component of the KS54000 at COLA has "healed" itself of the low frequency noise problem. No maintenance action was taken, but the low frequency noise is gone as of 2001,026,12:00. END **************************************************************************** DATA PROBLEM REPORT DMCQC2009:0007 2009/03/17 IRIS DMC Gillian Sharer DMC F09A TA *HE 2008,038,22:38:00 2008,074,23:43:00 Problem Description DEAD CHANNEL VM3 was against the stops during this time period. E channel recorded no seismic data. END PROBLEM RESOLUTION REPORT DMCQC2009:0007 2009/03/17 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION F09A resumed recording seismic data after a mass recenter on 2008 day 074 23:43 UTC. END **************************************************************************** DATA PROBLEM REPORT ASL2001:004 2001/01/10 ASL DCC Valerie Peyton ASL SPA IU **/*** 2001,009,00:00:00 2001,037,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. Field engineers are on site for testing and maintenance. Data quality will be variable during this time period, and channels may periodically be dead or simply not be available. END PROBLEM RESOLUTION REPORT ASL2001:004 2001/02/27 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Field engineers left SPA and returned home on 2001, 036. END **************************************************************************** DATA PROBLEM REPORT DMCQC2009:0006 2009/02/12 IRIS DMC Mary Templeton DMC DWPF IU * 2009,041,01:35:00 2009,042,14:35:00 Problem Description DEAD CHANNEL The KS54000 sensor was offline during this time span. END PROBLEM RESOLUTION REPORT DMCQC2009:0006 2009/02/12 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION The station resumed recording seismic energy at 2009,042,14:35. END **************************************************************************** DATA PROBLEM REPORT ASL2001:001 2001/01/04 ASL DCC Valerie Peyton ASL LSA IC 10/*H* 2001,003,01:00:00 2001,008,11:25:00 Problem Description NOISE SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. Noise levels on the STS-2 at LSA have increased dramatically as of 2001,003,01:00. The noise tracks on all three channels, with varying amplitude, and inverse polarity on nominal E with respect to nominal Z and N. Because of these noise characteristics, we think one of the U/V/W masses has lost mass capture, and the station operator will attempt to center the STS-2 at the next possible opportunity. END PROBLEM RESOLUTION REPORT ASL2001:001 2001/01/10 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The noise on the STS-2 at LSA is gone as of 2001,008,11:25. We're not sure how the problem was fixed, but we believe the station operator may have recentered the instrument. END **************************************************************************** DATA PROBLEM REPORT DMCQC2009:0005 2009/02/02 IRIS DMC Gillian Sharer DMC 118A TA * 2008,361,14:53:00 2009,021,17:21:00 Problem Description DEAD CHANNEL Starting on 2008 day 361, TA.118A recorded no seismic data, only noise. The masses were against the stops and the station stopped responding to mass recenters. END PROBLEM RESOLUTION REPORT DMCQC2009:0005 2009/02/02 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION On 2009 day 021 17:21 UTC, the station was removed. END **************************************************************************** DATA PROBLEM REPORT ASL2001:002 2001/01/05 ASL DCC Valerie Peyton ASL BJT IC 00/*HZ 2001,003,03:26:00 2001,005,02:30:00 Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE C 4810 Channel has transient long period signals. The Z component of the STS-1 at BJT is exhibiting intermittant episodes of non-periodic, high amplitude, low frequency noise. The source of this noise has not been determined. END PROBLEM RESOLUTION REPORT ASL2001:002 2001/01/08 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The station operator reset the STS-1 vertical component, and the low frequency noise disappeared. The data return to normal quality as of 2001,005,02:30. END **************************************************************************** DATA PROBLEM REPORT ASL2001:010 2001/02/06 ASL DCC Valerie Peyton ASL KBS IU 10/*H* 2001,015,08:52:00 2001,045,16:05:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The N component of the STS-2 at KBS is recording digitizer noise only as of 2001, 015, 08:52. The station operator will take a look at the instrument at the next available opportunity to see about diagnosing and solving the problem. The Z and E components of the STS-2 at KBS also have a problem during this time period: they are both recording the same data, 180 degrees out of phase, with different amplitudes. From the amplitude of first arrivals, it seems that the data being recorded is primarily vertical data, but there is no way to know for sure. The fact that one of the components in the STS-2 is malfunctioning means that the triaxial system cannot properly resolve ground motion. We cannot guarantee the validity of the Z and E data from the STS-2 during this time. END PROBLEM RESOLUTION REPORT ASL2001:010 2001/02/14 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The STS-2 was recentered on 2001, 045, 16:05 and the problems on all three components were resolved. Data quality have returned to normal. END **************************************************************************** DATA PROBLEM REPORT ASL2001:011 2001/02/12 ASL DCC Valerie Peyton ASL SNZO IU 10/*HN 2001,043,12:45:00 2001,044,00:35:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The N component of the CMG3-T at SNZO is against the stops as of 2001, 043, 12:45. The station operator will recenter the instrument at the earliest available convenience. END PROBLEM RESOLUTION REPORT ASL2001:011 2001/02/13 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The station operator recentered the CMG3-T at SNZO on 2001, 044, 00:35 and the data quality returned to normal. END **************************************************************************** DATA PROBLEM REPORT ASL2001:018 2001/03/05 ASL DCC Valerie Peyton ASL COLA IU 00/*HZ 2001,059,21:00:00 2001,084,14:17:00 Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE C 4504 Channel exibits high levels of low frequency noise. The Z component of the KS54000 at COLA is exhibiting excessive low frequency noise. The PSD looks normal until 0.05Hz (and below), at which point the noise levels increase dramatically. This noise has appeared and subsequently disappeared before, and the source has never been identified. Remote tests done with the station operator's help have indicated the problem is either in the seismometer or in the data cable coming from the seismometer (see ASL2001:000). Until we can send a field engineer to the site or replace the instrument, we will simply have to wait and hope that the noise disappears on its own, as it has in the past. END PROBLEM RESOLUTION REPORT ASL2001:018 2001/03/27 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The Z component of the KS54000 at COLA has "healed" itself of the low frequency noise problem. No maintenance action was taken, but the low frequency noise is gone as of 2001,084,14:17. END **************************************************************************** DATA PROBLEM REPORT ASL2001:019 2001/03/05 ASL DCC Valerie Peyton ASL COLA IU 00/*H2 2001,035,20:00:00 2001,035,20:00:00 Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE C 4555 High noise levels render data only marginally useable. The E component of the KS54000 at COLA is exhibiting excessive low frequency noise. The PSD looks normal until 0.05Hz (and below), at which point the noise levels increase dramatically. This noise has appeared and subsequently disappeared before, and the source has never been identified, but the problem is either in the seismometer or in the data cable coming from the seismometer. Until we can send a field engineer to the site or replace the instrument, we will simply have to wait and hope that the noise disappears on its own, as it has in the past. SUPPLEMENT 2003, 301 Over time, this problem on the 2 component of the 54000 at COLA also begins to affect the high frequency response. High frequency noise levels are 2 to 12dB too high from 0.6Hz on up to 10Hz. These noise problems are intermittant, and this problem report is simply being left open until the instrument can be repaired or replaced. END **************************************************************************** DATA PROBLEM REPORT ASL2001:016 2001/03/02 ASL DCC Valerie Peyton ASL SSE IC 00/*HE 2001,060,17:22:00 2001,068,06:45:00 Problem Description NOISE SEED COMMENT REFERENCE C 4400 Channel data quality is very poor. Noise levels and amplitudes are so high on the E component of the STS-1 at SSE that the E data are unuseable. END PROBLEM RESOLUTION REPORT ASL2001:016 2001/03/14 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The station operator at SSE was able to fix the noise problem on the STS-1 E. Data quality returns to normal early in the day on 2001, 068. END **************************************************************************** DATA PROBLEM REPORT ASL2001:017 2001/03/02 ASL DCC Valerie Peyton ASL OTAV IU 10/*HE 10/*HN 2001,060,16:30:00 2001,061,20:08:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The N and E components of the CMG3-T at OTAV have lost mass capture. The exact start time of the problem cannot be determined at this time because of gaps in live data transmission, but the last piece of good data from these two components was on 2001, 060, 16:30. When the data gaps are filled, we will modify the start time of the problem if necessary. END PROBLEM RESOLUTION REPORT ASL2001:017 2001/03/02 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION We were able to remotely recenter the CMG3-T at OTAV. As of 2001, 061, 20:08 the N and E component data quality is good. END **************************************************************************** DATA PROBLEM REPORT ASL2001:014 2001/02/27 ASL DCC George Slad ASL QIZ IC **/*** 2001,049,00:00:00 2001,055,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. Station is recording test data. Station installation in progress. END PROBLEM RESOLUTION REPORT ASL2001:014 2001/02/27 ASL DCC George Slad Description of Problem Resolution COMMENT Normal data resume at IC QIZ after installation stage. END **************************************************************************** DATA PROBLEM REPORT ASL2001:015 2001/02/27 ASL DCC Valerie Peyton ASL SPA IU 20/*** 2001,012,00:00:00 2001,080,16:40:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4105 Seismometer not connected to digitizer. The 20 instrument (a KS54000) at SPA was having operational problems, and eventually had to be shipped back to Albuquerque for repairs. Because of the rush to get everything done before summer ended at the pole, the 20 channels were mistakenly not shut off. We therefore have digitizer noise for the 20 channels during this time period. END PROBLEM RESOLUTION REPORT ASL2001:015 2001/03/22 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The station operator at SPA turned off collection of the 20 channels late in the day on 2001, 080. We will remove the months of 20 digitizer noise from the tape-based data archive when the tapes come in, so only the LISS data will be affected by this excess digitizer noise. END **************************************************************************** DATA PROBLEM REPORT ASL2001:012 2001/02/13 ASL DCC Tyler Storm ASL PTGA IU 10/* 2000,024,19:00:00 2000,024,19:00:00 Problem Description OTHER SEED COMMENT REFERENCE C 4010 Channel is down. Data from the CMG-3T are unuseable. END **************************************************************************** DATA PROBLEM REPORT ASL2001:013 2001/02/26 ASL DCC Valerie Peyton ASL GUMO IU 10/*HN 2001,056,01:30:00 2001,074,06:10:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The N component of the CMG3-T at GUMO lost mass capture early in the day on 2001, 056. END PROBLEM RESOLUTION REPORT ASL2001:013 2001/03/15 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The station operator at GUMO recentered the CMG3-T early in the day on 2001, 074. The N channel data quality has returned to normal. END **************************************************************************** DATA PROBLEM REPORT ASL2001:021 2001/03/05 ASL DCC Tyler Storm ASL BILL IU 00/*HE 2001,017,13:51:00 2001,018,09:21:53 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The east component of the STS-1 at BILL is against one of the stops. END PROBLEM RESOLUTION REPORT ASL2001:021 2001/03/05 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION The east component of the STS-1 at BILL was recentered on 2001,018,09:21:53, and the data quality returned to normal. END **************************************************************************** DATA PROBLEM REPORT ASL2001:022 2001/03/09 ASL DCC Tyler Storm ASL INCN IU 10/?HN 2000,358,01:01:00 2001,005,07:14:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The N/S data streams from the STS-2 instrument are unuseable. END PROBLEM RESOLUTION REPORT ASL2001:022 2001/03/09 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION Instrument was reset 2001,005,07:14:00. END **************************************************************************** DATA PROBLEM REPORT ASL2001:020 2001/03/05 ASL DCC Tyler Storm ASL TSUM IU 10/* 2001,011,10:00:00 2002,040,15:55:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. Data from the STS-2 are unuseable. END PROBLEM RESOLUTION REPORT ASL2001:020 2003/06/06 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The instrument problems with the STS2 at TSUM were resolved at 2002, 040, 15:55. Unfortunately, the instrument problems were followed by a noise problem. Data quality is not completely back to normal at this time, but it is close. For a description of the noise problem, and for the duration, please see ASL2003:128. END **************************************************************************** DATA PROBLEM REPORT ASL2001:029 2001/03/23 ASL DCC Tyler Storm ASL CASY IU 00/??Z 2000,339,07:35:00 2001,110,01:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. Data from the vertical STS-1 are unuseable. END PROBLEM RESOLUTION REPORT ASL2001:029 2002/04/17 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION Although the data are useable again as of 2001,110,01:00:00 the mass position does not stabilize until 2001,154. END **************************************************************************** DATA PROBLEM REPORT ASL2001:027 2001/03/20 ASL DCC Valerie Peyton ASL POHA IU 00/*H2 1999,317,00:00:00 2004,266,05:50:00 Problem Description SPIKES SEED COMMENT REFERENCE C 4520 Channel has occasional spiking. The 2 component (nominal E) of the KS54000 at POHA exhibits low-amplitude periodic spiking. Spikes are a couple hundred to a couple thousand counts in amplitude (thus below the noise) and are roughly 200 - 300 seconds in width. They are best seen on low-passed data. The spikes appear once every 4 to 10 hrs. The source of the spikes is unknown. These spikes occasionally occur during events, compromising event data. We will investigate further to see if the spike source can be found. END PROBLEM RESOLUTION REPORT ASL2001:027 2004/11/26 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The POHA 54000 was pulled and repaired for reasons unrelated to the spiking. However, the repairs have solved the spiking problem as of 2004, 266, 05:50. END **************************************************************************** DATA PROBLEM REPORT ASL2001:028 2001/03/21 ASL DCC Valerie Peyton ASL INCN IU 20/*** 1999,213,02:35:00 2004,311,13:06:00 Problem Description DATA GLITCHES SEED COMMENT REFERENCE C 4525 Channel has spiking and other data glitches. The FBA23 at INCN intermittantly displays what might be termed "fake" data: instead of digitizer noise, spurious signals appear. Sometimes event data are obscured by the spurious signals. The N component is generally most affected by whatever problem is causing these spurious signals; at times large events are clearly recorded on the Z & E components, while not at all visible on the N. We are investigating the cause of the problem. END PROBLEM RESOLUTION REPORT ASL2001:028 2005/08/08 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The INCN FBA23 spiking and data glitches appear to have disappeared by 2004, 311, 13:06. In addition, the N component resumed proper recording of events by this time. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2001:025 2001/03/19 ASL DCC Valerie Peyton ASL SSE IC 00/*HE 2001,076,03:25:00 2001,079,03:05:00 Problem Description NOISE SEED COMMENT REFERENCE C 4550 High noise levels render data unusable. Noise levels and amplitudes are so high on the E component of the STS-1 at SSE that the E data are unuseable. END PROBLEM RESOLUTION REPORT ASL2001:025 2001/03/20 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The station operator at SSE swapped the input cable on the STS1 E and N instruments. As of 2001, 079, 03:05 the data labeled 00/*HE are noise free, and are actually N data. For the end time on this cable swap, please see ASL2001:026. END **************************************************************************** DATA PROBLEM REPORT ASL2001:026 2001/03/20 ASL DCC Valerie Peyton ASL SSE IC 00/*HN, 00/*HE 2001,079,02:45:00 2001,080,07:45:00 Problem Description OTHER SEED COMMENT REFERENCE C 4334 N and E inputs swapped (ie, N <=> E). The station operator at SSE swapped data cable inputs between the STS1 E and N components in an effort to track down a noise problem on the E component. For this time period, data labeled 00/*HN are actually E component data; data labeled 00/*HE are actually N component data. With this swapping of cables, the high noise recorded earlier on 00/*HE data is now recorded on 00/*HN data. END **************************************************************************** DATA PROBLEM REPORT ASL2001:023 2001/03/15 ASL DCC Tyler Storm ASL XMAS IU */?H? 2000,363,10:37:00 2001,093,21:20:15 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. Data from the STS-2 are unuseable. END PROBLEM RESOLUTION REPORT ASL2001:023 2001/05/04 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION The instrument was reset 2001,093,21:20:15. END **************************************************************************** DATA PROBLEM REPORT ASL2001:024 2001/03/19 ASL DCC Valerie Peyton ASL GUMO IU 10/*HE 2001,078,05:57:00 2001,079,03:18:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The E component of the CMG3-T at GUMO lost mass capture on 2001, 078. The station operator will recenter the instrument at his earliest opportunity. END PROBLEM RESOLUTION REPORT ASL2001:024 2001/03/20 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The station operator at GUMO recentered the CMG3-T, and E data quality returns to normal on 2001, 079, 03:18. END **************************************************************************** DATA PROBLEM REPORT ASL2001:032 2001/03/30 ASL DCC Tyler Storm ASL KOWA IU 00/?HN, 00/?HE 2001,049,16:40:00 2001,049,16:40:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. N/S and E/W data from the STS-1 instruments are unuseable. END **************************************************************************** DATA PROBLEM REPORT ASL2001:033 2001/04/02 ASL DCC Valerie Peyton ASL SNZO IU 10/*HN 2001,088,19:46:00 2001,098,23:59:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The N component of the CMG3-T at SNZO is resting against the stop. Data are unuseable. The station operator will recenter the instrument at the earliest available opportunity. END PROBLEM RESOLUTION REPORT ASL2001:033 2001/04/09 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The CMG3-T at SNZO was recentered at the very end of the day on 2001, 098. Data quality has returned to normal. END **************************************************************************** DATA PROBLEM REPORT ASL2001:030 2001/03/26 ASL DCC Valerie Peyton ASL SSE IC 00/*HE 2001,082,07:25:00 2001,088,07:30:00 Problem Description NOISE SEED COMMENT REFERENCE C 4550 High noise levels render data unusable. Noise levels and amplitudes are so high on the E component of the STS-1 at SSE that the E data are unuseable. This is the same noise problem that has been coming and going recently on the 00-E channel at SSE. The source is still unidentified. END PROBLEM RESOLUTION REPORT ASL2001:030 2001/03/29 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The station operator at SSE was able to fix the noise problem on the STS-1 E. Data quality returns to normal early in the day on 2001, 088. END **************************************************************************** DATA PROBLEM REPORT ASL2001:031 2001/03/30 ASL DCC Tyler Storm ASL KOWA IU 10/?HE 2001,049,16:40:00 2001,049,16:40:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. E/W data from the CMG3-T are unuseable. END **************************************************************************** DATA PROBLEM REPORT ASL2001:038 2001/04/02 ASL DCC Valerie Peyton ASL CCM IU **/*** 2001,069,23:00:00 2001,071,16:00:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 440 Clock Unlocked. The clock at CCM has lost its lock on the GPS timing standard. Timing in the data is unreliable. END PROBLEM RESOLUTION REPORT ASL2001:038 2001/04/02 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The clock at CCM locked back onto the GPS signal around midday on 2001, 071. END **************************************************************************** DATA PROBLEM REPORT ASL2001:039 2001/04/02 ASL DCC Valerie Peyton ASL CCM IU **/*** 2001,075,02:00:00 2001,075,18:00:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 440 Clock Unlocked. The clock at CCM has lost its lock on the GPS timing standard. Timing in the data is unreliable. END PROBLEM RESOLUTION REPORT ASL2001:039 2001/04/02 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The clock at CCM locked back onto the GPS signal after about 16 hours. During this time, the station operator was working on the clock in order to fix some problems it was having. This clock has been having intermittant problems since the beginning of February 2001, but with the station operator's help the clock has been repaired. This should be the last clock problem for a while. END **************************************************************************** DATA PROBLEM REPORT ASL2001:036 2001/04/02 ASL DCC Valerie Peyton ASL CCM IU **/*** 2001,055,04:50:00 2001,055,22:20:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 440 Clock Unlocked. The clock at CCM has lost its lock on the GPS timing standard. Timing in the data is unreliable. END PROBLEM RESOLUTION REPORT ASL2001:036 2001/04/02 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The clock at CCM locked back onto the GPS signal about 18 hrs after losing the signal lock. END **************************************************************************** DATA PROBLEM REPORT ASL2001:037 2001/04/02 ASL DCC Valerie Peyton ASL CCM IU **/*** 2001,059,22:50:00 2001,061,17:00:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 440 Clock Unlocked. The clock at CCM has lost it's lock on the GPS timing standard. Timing in the data is unreliable. END PROBLEM RESOLUTION REPORT ASL2001:037 2001/04/02 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The clock at CCM locked back onto the GPS signal on 2001, 061. END **************************************************************************** DATA PROBLEM REPORT ASL2001:034 2001/04/02 ASL DCC Valerie Peyton ASL CCM IU **/*** 2001,036,20:42:00 2001,042,23:00:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 440 Clock Unlocked. The clock at CCM has lost it's lock on the GPS timing standard. Timing in the data is unreliable. END PROBLEM RESOLUTION REPORT ASL2001:034 2001/04/02 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The clock at CCM locked back onto the GPS signal near the close of the day on 2001, 042. END **************************************************************************** DATA PROBLEM REPORT ASL2001:035 2001/04/02 ASL DCC Valerie Peyton ASL CCM IU **/*** 2001,047,23:45:00 2001,054,02:50:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 440 Clock Unlocked. The clock at CCM has lost its lock on the GPS timing standard. Timing in the data is unreliable. END PROBLEM RESOLUTION REPORT ASL2001:035 2001/04/02 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The clock at CCM locked back onto the GPS signal near the beginning of the day on 2001, 054. END **************************************************************************** DATA PROBLEM REPORT ASL2001:043 2001/04/06 ASL DCC Valerie Peyton ASL DAV IU *LE 1997,224,09:48:00 1998,015,01:30:00 Problem Description NOISE SEED COMMENT REFERENCE C 4420 Channel data quality is fair. The E/W component of the FBA-23 at DAV is exhibiting spiking and spurious signals. Sometimes these signals interfere with actual event signals. END PROBLEM RESOLUTION REPORT ASL2001:043 2001/04/06 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The FBA-23 at DAV was replaced on 1998,015. The new FBA-23 produces good clean E/W data. END **************************************************************************** DATA PROBLEM REPORT ASL2001:044 2001/04/12 ASL DCC Valerie Peyton ASL BGCA GT SHZ 2001,092,01:41:00 2001,130,01:45:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4625 Invalid instrument response. The GS21 at BGCA is producing data with corrupt response. The SHZ response is roughly 30dB quieter than it should be. All other aspects of the response curve look fine, just shifted down 30dB. We do not know what caused the problem but in many respects it appears that only half of the double-ended output of the instrument is being recorded. We will do our best to inform the GT network operators of the problem. END PROBLEM RESOLUTION REPORT ASL2001:044 2001/05/23 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The GTSN operators fixed the GS21 at BGCA, and the instrument response has returned to normal. END **************************************************************************** DATA PROBLEM REPORT ASL2001:041 2001/04/06 ASL DCC Valerie Peyton ASL OTAV IU 10/*** 2001,094,17:35:00 2001,095,20:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. All three masses of the CMG3-T at OTAV are against their stops. The 10 instrument data are useless during this time period. END PROBLEM RESOLUTION REPORT ASL2001:041 2001/04/06 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The CMG3-T at OTAV was recentered just over a day after the masses hit their stops. Data quality has returned to normal. END **************************************************************************** DATA PROBLEM REPORT ASL2001:042 2001/04/06 ASL DCC Valerie Peyton ASL DAV IU 00/*HZ 1999,356,03:00:00 1999,356,03:00:00 Problem Description OTHER SEED COMMENT REFERENCE C 4410 Channel data quality is poor. The vertical component of the STS1 at DAV exhibits spiking whose frequency gradually increases from roughly 4 hrs between spikes on 1999, 356, to so little time between spikes that the low frequency response of the instrument appears to be inaccurate. By early 2001 the low frequency response is about 20 dB noisier than it should be. We will investigate the source of the problem and endeavor to rectify it. END **************************************************************************** DATA PROBLEM REPORT ASL2001:040 2001/04/04 ASL DCC Valerie Peyton ASL DAV IU * 1999,092,00:00:00 1999,110,08:00:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 440 Clock Unlocked. The clock at DAV is unlocked from the GPS timing standard during this time. Timing is unreliable. END PROBLEM RESOLUTION REPORT ASL2001:040 2001/04/04 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The clock at DAV locked back onto the timing standard in the morning of 1999, 110. Timing is once more reliable. END **************************************************************************** DATA PROBLEM REPORT ASL2001:049 2001/04/19 ASL DCC Tyler Storm ASL LVC IU 10/?HN, 10/?HE 2000,188,22:12:00 2001,090,19:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The N/S and E/W channels from the CMG3-T are dead. END PROBLEM RESOLUTION REPORT ASL2001:049 2001/08/20 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION An ASL field engineer was at LVC and recentered the CMG3-T on 2001, 090. Data quality returns to normal. END **************************************************************************** DATA PROBLEM REPORT ASL2001:047 2001/04/18 ASL DCC Valerie Peyton ASL ENH IC 10/*H* 2001,106,21:15:00 2001,111,09:18:00 Problem Description SPIKES SEED COMMENT REFERENCE C 4510 Channel has frequent spiking. All three components of the STS-2 at ENH are exhibiting coherent spikes of considerable amplitude. From the mass position data, it is apparent that the U mass (nominal Z) is almost against the stop, and the V & W masses (nominal N & E) are wending their ways towards their stops as well. The station operator has been asked to recenter the instrument at the next available opportunity. Recentering should solve the spiking problem. END PROBLEM RESOLUTION REPORT ASL2001:047 2004/03/03 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The coherent spiking on the STS2 at ENH ended at 2001, 111, 09:18. The problem was not solved by centering the masses, so the source of the spiking is unknown. However, data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2001:048 2001/04/19 ASL DCC Valerie Peyton ASL AFI IU 00/BHN 2000,315,09:38:00 2003,015,21:19:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4622 Incorrect instrument response for high frequencies only The response of the STS1 N at AFI is incorrect at high frequencies. For 0.7Hz and higher, the STS1 N response is up to 12dB lower than the response of the STS2 N. END PROBLEM RESOLUTION REPORT ASL2001:048 2004/11/26 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The response problem on the STS1 N at AFI appears to have been corrected by recentering the mass. Regardless of the source of the solution, data quality returns to normal at 2003, 015, 21:19. END **************************************************************************** DATA PROBLEM REPORT ASL2001:045 2001/04/16 ASL DCC Valerie Peyton ASL GUMO IU 10/*HE 2001,104,19:16:00 2001,105,22:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The E component of the CMG3-T at GUMO was pegged by a large event. Data are unuseable. END PROBLEM RESOLUTION REPORT ASL2001:045 2001/04/16 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The station operator noticed the pegged mass and recentered the GUMO CMG3-T about a day later. Data quality has returned to normal. END **************************************************************************** DATA PROBLEM REPORT ASL2001:046 2001/04/18 ASL DCC Valerie Peyton ASL QIZ IC 00/*H* 2001,106,12:05:00 2001,109,03:37:00 Problem Description OTHER SEED COMMENT REFERENCE C 4410 Channel data quality is poor. The STS-2 at QIZ has begun to cycle between periods of high and low background noise. Each cycle last roughly 3 hours (~1.5 hours of low background noise, followed by ~1.5 hours of high background noise). We have asked the station operator to look into the source of the problems and see if a solution cannot be found which allows the seismometer to operate only in the low background noise regime. END PROBLEM RESOLUTION REPORT ASL2001:046 2001/04/19 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The station operator at QIZ was able to stop the STS-2 from cycling between high and low background noise. Early in the day on 2001,109 the seismometer settles down with lower background noise than before the cycling problem began. END **************************************************************************** DATA PROBLEM REPORT ASL2001:054 2001/05/14 ASL DCC Valerie Peyton ASL LPAZ GT *** 2001,031,08:16:00 2001,141,17:51:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The KS54000 at LPAZ is down and all three channels are recording digitizer noise. There are also problems with the digitizer at LPAZ. GTSN field engineers are working on the problem. END PROBLEM RESOLUTION REPORT ASL2001:054 2001/05/22 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION GTSN field engineers fixed both the seismometer and the digitizer at LPAZ. The station is once more acquiring normal quality data. END **************************************************************************** DATA PROBLEM REPORT ASL2001:055 2001/05/15 ASL DCC George Slad ASL ZLP HG LH? 1975,172,00:00:00 1975,174,00:00:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4625 Invalid instrument response. The instrument response and sensitivity may be inaccurate during this time period. END PROBLEM RESOLUTION REPORT ASL2001:055 2001/05/15 ASL DCC George Slad Description of Problem Resolution RESOLUTION No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT ASL2001:052 2001/04/25 ASL DCC Valerie Peyton ASL GUMO IU 10/*HN 2001,115,09:30:00 2001,116,06:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The N component of the CMG3-T at GUMO is against the stop as of 2001,115,09:30. END PROBLEM RESOLUTION REPORT ASL2001:052 2001/04/26 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The station operator at GUMO recentered the CMG3-T about 20 hrs after the N mass had fallen against the stop. Data quality have returned to normal. END **************************************************************************** DATA PROBLEM REPORT ASL2001:053 2001/04/30 ASL DCC Valerie Peyton ASL ANMO IU 10/*H* 2001,115,14:00:00 2001,119,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. A maintence team was installing the global communications infrastructure signal splitter on the CMG3-T-B to allow data to be beamed to the CTBTO via a satellite link. This work did not affect the KS54000 (the 00 instrument) or the FBA23 (the 20 instrument). END PROBLEM RESOLUTION REPORT ASL2001:053 2001/04/30 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The maintenance tean finished their work on the CMG3-T-B at ANMO late in the day on 2001,118. END **************************************************************************** DATA PROBLEM REPORT ASL2001:050 2001/04/23 ASL DCC Valerie Peyton ASL RCBR IU 00/*H* 2000,361,20:36:00 2001,071,12:33:00 Problem Description OTHER The DC offset on the KS54000 at RCBR has once more changed drastically. Instead of being around zero, the DC offset is now in the hundreds of thousands of counts for the BH* channels. Except for this huge DC offset, the data are fine. END PROBLEM RESOLUTION REPORT ASL2001:050 2001/04/23 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The DC offsets on the KS54000 at RCBR have returned to normal. The DC offsets for the digitizer are usually set in the DA hard drive. Because the comm link at RCBR is unreliable, the station operator swaps DA hard drives on a regular basis and ships them to us so we can recover more data than is written to tape. A number of the DA hard drives do not have the proper DC offset programmed into them. We are tracking them down so that the DC offset will remain stable. END **************************************************************************** DATA PROBLEM REPORT ASL2001:051 2001/04/23 ASL DCC Valerie Peyton ASL RCBR IU 00/*H* 2001,113,11:39:00 2001,197,17:40:00 Problem Description OTHER The DC offset on the KS54000 at RCBR has once more changed drastically. Instead of being around zero, the DC offset is now in the hundreds of thousands of counts for the BH* channels. Except for this huge DC offset, the data are fine. END PROBLEM RESOLUTION REPORT ASL2001:051 2001/07/17 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The DC offsets on the KS54000 at RCBR have returned to normal. END **************************************************************************** DATA PROBLEM REPORT ASL2001:058 2001/05/15 ASL DCC George Slad ASL MAT HG LHN 1976,245,00:00:00 1977,111,00:00:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4625 Invalid instrument response. The instrument response and sensitivity given may be inaccurate during this time period. END PROBLEM RESOLUTION REPORT ASL2001:058 2001/05/15 ASL DCC George Slad Description of Problem Resolution RESOLUTION No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT ASL2001:059 2001/05/15 ASL DCC George Slad ASL KON HG LH? 1975,094,00:00:00 1975,104,00:00:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4625 Invalid instrument response. The instrument response and sensitivity given may be inaccurate during this time period. END PROBLEM RESOLUTION REPORT ASL2001:059 2001/05/15 ASL DCC George Slad Description of Problem Resolution RESOLUTION No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT ASL2001:056 2001/05/15 ASL DCC George Slad ASL TLO HG LH? 1976,219,00:00:00 1976,296,00:00:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4625 Invalid instrument response. The instrument response and sensitivity given may be inaccurate during this time period. END PROBLEM RESOLUTION REPORT ASL2001:056 2001/05/15 ASL DCC George Slad Description of Problem Resolution RESOLUTION No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT ASL2001:057 2001/05/15 ASL DCC George Slad ASL MAT HG LHZ 1976,201,00:00:00 1976,245,00:00:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4625 Invalid instrument response. The instrument response and sensitivity given may be inaccurate during this time period. END PROBLEM RESOLUTION REPORT ASL2001:057 2001/05/15 ASL DCC George Slad Description of Problem Resolution RESOLUTION No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT ASL2001:065 2001/05/22 ASL DCC Tyler Storm ASL DWPF IU */* 2000,073,05:10:00 2001,169,17:01:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 450 Time Uncertain. Timing "may" be in error. Although I cannot detect a timing error when comparing predicted P arrival times to actual P-picks, the system is logging error messages which indicate the system cannot see the GPS receiver. END PROBLEM RESOLUTION REPORT ASL2001:065 2001/06/13 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The GPS receiver has been replaced. The old GPS receiver appears to have been compromised by an overabundance of antennae: it was found to be infested with large ants. Replacing the unit was rather aardvark. The station operator will keep an eye on the new receiver and attempt to prevent future infestations by regular recourse to extermination techniques appropriate to the locale. END **************************************************************************** DATA PROBLEM REPORT ASL2001:066 2001/05/23 ASL DCC Valerie Peyton ASL BILL IU 00/*HN 2001,142,11:50:00 2001,144,10:15:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The N component of the STS1 at BILL is dead. First the mass slides to one of the stops and is pegged, and then it begins to record only digitizer noise. END PROBLEM RESOLUTION REPORT ASL2001:066 2001/05/24 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The station operator fixed whatever problem the STS1 N at BILL had had. Data return to normal quality just before midday on 2001, 144. END **************************************************************************** DATA PROBLEM REPORT ASL2001:063 2001/05/17 ASL DCC Valerie Peyton ASL LSA IC 10/*H* 2001,072,22:02:00 2001,253,09:18:00 Problem Description NOISE SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. One of the masses on the STS2 at LSA is pegged. This is causing severe noise on all three channels. The start time of the problem is currently unknown, as live LSA data were unavailable for a couple of weeks. We will correct the start time when the data tapes come in. END PROBLEM RESOLUTION REPORT ASL2001:063 2001/09/10 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The STS2 at LSA proved to be impossible to recenter, so a replacement seismometer was shipped. The new seismometer was installed and began producing good data on 2001,253. END **************************************************************************** DATA PROBLEM REPORT ASL2001:064 2001/05/17 ASL DCC Valerie Peyton ASL GUMO IU **/*** 2001,132,07:40:00 2001,141,14:50:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. Field engineers are on site at GUMO installing a signal splitter for the CTBTO. Testing and other data anomalies are expected. END PROBLEM RESOLUTION REPORT ASL2001:064 2001/05/21 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The last field engineer left GUMO and the station returned to normal operational behaviour late in the day on 2001,141. END **************************************************************************** DATA PROBLEM REPORT ASL2001:061 2001/05/15 ASL DCC George Slad ASL KON HG LHE 1977,071,00:00:00 1977,118,00:00:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4625 Invalid instrument response. The instrument response and sensitivity given may be inaccurate during this time period. END PROBLEM RESOLUTION REPORT ASL2001:061 2001/05/15 ASL DCC George Slad Description of Problem Resolution RESOLUTION No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT ASL2001:062 2001/05/15 ASL DCC George Slad ASL KIP HG LHZ 1976,029,00:00:00 1976,140,00:00:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4625 Invalid instrument response. The instrument response and sensitivity given may be inaccurate during this time period. END PROBLEM RESOLUTION REPORT ASL2001:062 2001/05/15 ASL DCC George Slad Description of Problem Resolution RESOLUTION No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT ASL2001:060 2001/05/15 ASL DCC George Slad ASL KON HG LHN 1977,118,00:00:00 1977,278,00:00:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4625 Invalid instrument response. The instrument response and sensitivity given may be inaccurate during this time period. END PROBLEM RESOLUTION REPORT ASL2001:060 2001/05/15 ASL DCC George Slad Description of Problem Resolution RESOLUTION No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT ASL2001:069 2001/06/04 ASL DCC Tyler Storm ASL MAKZ IU 00/?HZ 2001,072,19:04:00 2001,128,18:36:00 Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE C 1850 Sensor has lost vacuum containment. The bell jar containing the vertical STS-2 instrument has lost vacuum. END PROBLEM RESOLUTION REPORT ASL2001:069 2001/06/04 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION Vacuum was restored 2001,128,18:36:00. Data noise levels are back to normal. END **************************************************************************** DATA PROBLEM REPORT ASL2001:067 2001/05/30 ASL DCC Valerie Peyton ASL SJG IU **/*** 2001,149,12:00:00 2001,157,01:00:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. Field engineers are on site at SJG installing CTBTO-related equipment. Testing and other data anomalies are expected. END PROBLEM RESOLUTION REPORT ASL2001:067 2001/06/06 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The fields engineers finished their work and left SJG on 2001,157 just after midday. SJG data quality have returned to normal. END **************************************************************************** DATA PROBLEM REPORT ASL2001:068 2001/05/31 ASL DCC Valerie Peyton ASL LVC IU 10/*HE 2001,150,07:39:00 2001,229,20:05:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The E component of the CMG3-T at LVC has lost mass capture. END PROBLEM RESOLUTION REPORT ASL2001:068 2001/08/20 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The station operator recentered the CMG3-T at LVC late in the day on 2001,229. Data quality has returned to normal. END **************************************************************************** DATA PROBLEM REPORT ASL2001:076 2001/06/18 ASL DCC Valerie Peyton ASL TIXI IU 00/*HE 2001,168,11:14:00 2001,169,10:46:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The E component of the STS1 at TIXI is pegged. END PROBLEM RESOLUTION REPORT ASL2001:076 2001/06/18 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The station operator at TIXI recentered the E component of the STS1 roughly a day after the mass had fallen against its stop. END **************************************************************************** DATA PROBLEM REPORT ASL2001:077 2001/06/18 ASL DCC Tyler Storm ASL KOWA IU 00/*HZ 2001,068,19:48:00 2001,068,19:48:00 Problem Description OTHER SEED COMMENT REFERENCE C 4010 Channel is down. Data from the vertical STS-1 instrument are unuseable. END **************************************************************************** DATA PROBLEM REPORT ASL2001:074 2001/06/18 ASL DCC Valerie Peyton ASL BILL IU 00/*HE 2001,167,03:43:00 2001,168,12:47:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The E component of the STS1 at BILL is pegged. END PROBLEM RESOLUTION REPORT ASL2001:074 2001/06/18 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The station operator at BILL recentered the E component of the STS1 roughly a day after the mass had fallen against its stop. END **************************************************************************** DATA PROBLEM REPORT ASL2001:075 2001/06/18 ASL DCC Valerie Peyton ASL BILL IU 00/*HN 2001,168,06:59:00 2001,168,12:47:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The N component of the STS1 at BILL is pegged. END PROBLEM RESOLUTION REPORT ASL2001:075 2001/06/18 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The station operator at BILL recentered the N component of the STS1 roughly 6 hours after the mass had fallen against its stop. END **************************************************************************** DATA PROBLEM REPORT ASL2001:072 2001/06/15 ASL DCC Valerie Peyton ASL BILL IU 00/*HE 2001,164,14:00:00 2001,165,02:27:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The E component of the STS1 at BILL is pegged. END PROBLEM RESOLUTION REPORT ASL2001:072 2001/06/15 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The station operator at BILL recentered the E component of the STS1 roughly 12 hours after the mass had fallen against its stop. END **************************************************************************** DATA PROBLEM REPORT ASL2001:073 2001/06/15 ASL DCC Valerie Peyton ASL TIXI IU 00/*HE 2001,166,05:18:00 2001,167,08:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The E component of the STS1 at TIXI is pegged. END PROBLEM RESOLUTION REPORT ASL2001:073 2001/06/18 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The station operator at TIXI recentered the E component of the STS1 roughly a day after the mass had fallen against its stop. END **************************************************************************** DATA PROBLEM REPORT ASL2001:070 2001/06/08 ASL DCC Valerie Peyton ASL DBIC GT *HN 2001,154,05:00:00 2001,228,17:40:00 Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE C 4504 Channel exibits high levels of low frequency noise. The N component of the 54000 at DBIC is exhibiting excessive low frequency noise. The PSD looks normal until about 0.12 Hz (and below), at which point the noise levels increase dramatically. The source of the noise has not been determined. END PROBLEM RESOLUTION REPORT ASL2001:070 2001/08/17 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Low frequency noise levels on the N component of the 54000 at DBIC have returned to normal. Neither the source of nor the solution to the problem are currently known. Data quality is, however, back to normal. END **************************************************************************** DATA PROBLEM REPORT ASL2001:071 2001/06/12 ASL DCC Valerie Peyton ASL BILL IU 00/*HN 2001,162,12:55:00 2001,165,02:27:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The N component of the STS1 at BILL is pegged. The station operator has been informed of the problem and will attempt to recenter the instrument at the earliest available opportunity. END PROBLEM RESOLUTION REPORT ASL2001:071 2001/06/15 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The station operator at BILL recentered the N component of the STS1 on 2001,165. END **************************************************************************** DATA PROBLEM REPORT ASL2010:090 2010/04/15 ASL DCC Cory Gilbert ASL PMG IU ALL CHANNELS 2010,104,00:00:00 2010,104,00:00:00 Problem Description OTHER There will be a field crew on-site for the next 8-10 days performing the Q330 upgrade. END **************************************************************************** DATA PROBLEM REPORT ASL2010:091 2010/04/15 ASL DCC Cory Gilbert ASL SNZO IU 10/?HN, 10/?HE 2010,101,09:40:33 2010,101,09:40:33 Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE C 4504 Channel exibits high levels of low frequency noise. Following a M6.9 event on 2010,101 the CMG horizontals are quite noisy above about 9 seconds. ASL field engineers are looking into it. END PROBLEM RESOLUTION REPORT ASL2010:091 2010/04/21 ASL DCC Cory Gilbert Description of Problem Resolution RESOLUTION The instrument was re-centered and is operating normally again. END **************************************************************************** DATA PROBLEM REPORT ASL2010:092 2010/04/19 ASL DCC Cory Gilbert ASL HKT IU 00/?HE 2010,101,11:00:00 2010,101,11:00:00 Problem Description OTHER SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The STS-1 E/W component has fallen against its stops. END **************************************************************************** DATA PROBLEM REPORT ASL2010:093 2010/04/21 ASL DCC Cory Gilbert ASL PAB IU ALL CHANNELS 2010,111,00:00:00 2010,111,00:00:00 Problem Description OTHER There is a field crew on-site performing maintenance for the next 8-10 days. END PROBLEM RESOLUTION REPORT ASL2010:093 2010/05/03 ASL DCC Cory Gilbert Description of Problem Resolution RESOLUTION The field crew has finished with the maintennance work and is enroute back home. END **************************************************************************** DATA PROBLEM REPORT ASL2010:098 2010/05/03 ASL DCC Cory Gilbert ASL PASC CI ?0/?H? 2010,122,04:00:00 2010,122,04:00:00 Problem Description OTHER SEED COMMENT REFERENCE C 4527 Channel displays digitizer-related data glitches. It looks like the digitizer may be dropping out at PASC. Both components show very gappy data beginning on May 2 around 04:00 UTC. END PROBLEM RESOLUTION REPORT ASL2010:098 2010/05/05 ASL DCC Cory Gilbert Description of Problem Resolution RESOLUTION The gappy data issue has been resolved. END **************************************************************************** DATA PROBLEM REPORT ASL2010:099 2010/05/03 ASL DCC Cory Gilbert ASL PAYG IU ?0/?H? 2010,118,00:00:00 2010,118,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE C 4010 Channel is down. There is a field crew currently on-site performing the Q330 upgrade. END **************************************************************************** DATA PROBLEM REPORT ASL2010:094 2010/04/21 ASL DCC Cory Gilbert ASL KBS IU 00/?HE 2010,081,10:37:50 2010,081,10:37:50 Problem Description OTHER SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The STS-1 E/W has fallen against its stops. END **************************************************************************** DATA PROBLEM REPORT ASL2010:095 2010/04/21 ASL DCC Cory Gilbert ASL HNR IU ALL CHANNELS 2010,111,00:00:00 2010,111,00:00:00 Problem Description OTHER There is a field crew on-site right now performing the Q330 upgrade. They will be there for the next 8-10 days. END PROBLEM RESOLUTION REPORT ASL2010:095 2010/05/03 ASL DCC Cory Gilbert Description of Problem Resolution RESOLUTION The field crew finished the Q330 upgrade process and is now enroute back home. END **************************************************************************** DATA PROBLEM REPORT ASL2001:078 2001/06/20 ASL DCC Valerie Peyton ASL TIXI IU 00/*HE 2001,170,14:08:00 2001,172,10:13:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The E component of the STS1 at TIXI is pegged. END PROBLEM RESOLUTION REPORT ASL2001:078 2001/06/21 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The TIXI station operator recentered the E component of the STS-1 roughly 2 days after the mass had fallen against the stop. Data quality has returned to normal. END **************************************************************************** DATA PROBLEM REPORT ASL2010:096 2010/04/29 ASL DCC Cory Gilbert ASL PASC CI 00/?H1 2010,103,00:00:00 2010,103,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE C 4521 Channel displays regular pulsing. This instrument has been pulsing on the ?H1 component for a little over a week now. There seems to be a period of about 1.3 hours on the pulses. END **************************************************************************** DATA PROBLEM REPORT ASL2001:079 2001/06/25 ASL DCC Valerie Peyton ASL RCBR IU 10/*H1 2001,174,20:57:00 2001,177,18:53:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The 1 component (nominal N) of the CMG3-T-B is pegged. The 8.0 earthquake off the coast of Peru caused the mass to fall against one of the stops. END PROBLEM RESOLUTION REPORT ASL2001:079 2001/06/27 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The station operator at RCBR recentered the CMG3-T-B roughly three days after the 1 component had fallen against a stop. Data quality has returned to normal. END **************************************************************************** DATA PROBLEM REPORT ASL2010:097 2010/04/30 ASL DCC Cory Gilbert ASL TARA IU 00/?H? 2009,317,12:00:00 2009,317,12:00:00 Problem Description NOISE SEED COMMENT REFERENCE C 4400 Channel data quality is very poor. All three components are very noisy and almost unusable. END **************************************************************************** DATA PROBLEM REPORT ASL2001:087 2001/07/09 ASL DCC Valerie Peyton ASL GUMO IU 10/*HE 2001,188,08:03:00 2001,190,15:08:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The E component of the CMG3-T at GUMO has fallen against one of the stops. Data from this component are useless. The station operator at GUMO has been informed of the problem. He is fantastic and usually addresses such problems in less than 24 hours. We anticipate that this problem will be short-lived. END PROBLEM RESOLUTION REPORT ASL2001:087 2001/07/10 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The CMG3-T at GUMO was recentered on 2001,190. Data quality has returned to normal. END **************************************************************************** DATA PROBLEM REPORT ASL2001:088 2001/07/09 ASL DCC Valerie Peyton ASL MSKU IU **/*** 2001,187,00:00:00 2001,194,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. Field engineers are on-site at MSKU, trying to get the station in operational order. Tests, calibrations, and general data anomalies are expected. END PROBLEM RESOLUTION REPORT ASL2001:088 2001/07/17 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The field engineers did what they could to get MSKU operating, but were unable to. The station infrastructure needs replacing, as do many of the components of the data acquisition system. Another attempt at getting the station working will be made after the tunnel has been rehabilitated and we have devised a means of keeping corrosive elements from infiltrating the station electronics. END **************************************************************************** DATA PROBLEM REPORT ASL2001:085 2001/07/06 ASL DCC Valerie Peyton ASL MA2 IU 00/*HN 2001,187,04:01:00 2001,190,01:31:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The N component of the STS-1 at MA2 has fallen against one of the stops. Data quality is compromised. END PROBLEM RESOLUTION REPORT ASL2001:085 2001/07/09 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The station operator at MA2 recentered the N component of the STS-2 near the beginning of the day on 2001,190. END **************************************************************************** DATA PROBLEM REPORT ASL2001:086 2001/07/09 ASL DCC Valerie Peyton ASL ANMO IU 10/*H2 2001,188,18:48:00 2001,189,21:35:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The 2 component (nominal E) of the CMG3-T-B at ANMO is inoperational during this time period. END PROBLEM RESOLUTION REPORT ASL2001:086 2001/07/09 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The 2 component of the CMG3-T-B at ANMO returned to normal operation of its own accord. Data quality is fine once again. END **************************************************************************** DATA PROBLEM REPORT ASL2001:083 2001/07/05 ASL DCC Valerie Peyton ASL LVC IU 10/*HZ 2001,177,15:11:00 2001,229,20:05:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The Z component of the CMG3-T at LVC is pegged. At this point, all three components of the CMG3-T at LVC are pegged. The station operator is having difficulty recentering the instrument, as the instrument is unresponsive. We have sent instructions on how to coax a recalcitrant CMG into recentering, and hopefully the station operator will have more success with his next attempt. END PROBLEM RESOLUTION REPORT ASL2001:083 2001/08/20 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The station operator recentered the CMG3-T at LVC late in the day on 2001,229. Data quality has returned to normal. END **************************************************************************** DATA PROBLEM REPORT ASL2001:084 2001/07/05 ASL DCC Valerie Peyton ASL BGCA GT SHZ 2001,180,09:50:00 2001,223,07:34:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4625 Invalid instrument response. The GS21 at BGCA is producing data with corrupt response. The SHZ response is roughly 30dB quieter than it should be. All other aspects of the response curve look fine, just shifted down 30dB. We do not know what caused the problem but in many respects it appears that only half of the double-ended output of the instrument is being recorded. END PROBLEM RESOLUTION REPORT ASL2001:084 2001/08/22 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The response of the GS21 at BGCA has gradually returned to normal. The response is fully normalized by 2001,223. END **************************************************************************** DATA PROBLEM REPORT ASL2001:081 2001/06/25 ASL DCC Valerie Peyton ASL OTAV IU 10/*HN 10/*HE 2001,174,20:43:00 2001,264,17:19:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The CMG3-T N and E components at OTAV are pegged. The 8.0 earthquake off the coast of Peru caused the masses to fall against their stops. END PROBLEM RESOLUTION REPORT ASL2001:081 2001/10/01 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION One of our field engineers was on-site doing maintenance work on OTAV. During this time he managed to recenter the CMG3-T. Data quality returns to normal late in the day on 2001,264. END **************************************************************************** DATA PROBLEM REPORT ASL2001:082 2001/06/28 ASL DCC Valerie Peyton ASL GUMO IU 10/*HE 2001,178,12:25:00 2001,179,14:50:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The E component of the CMG3-T at GUMO has fallen against one of the stops. END PROBLEM RESOLUTION REPORT ASL2001:082 2001/06/28 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION We were able to recenter the CMG3-T remotely. Data quality has returned to normal. END **************************************************************************** DATA PROBLEM REPORT ASL2001:080 2001/06/25 ASL DCC Valerie Peyton ASL LVC IU 10/*HN 2001,174,20:36:00 2001,229,20:05:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The N component of the CMG3-T at LVC is pegged. The 8.0 earthquake off the coast of Peru caused the mass to fall against one of the stops. END PROBLEM RESOLUTION REPORT ASL2001:080 2001/08/20 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The station operator recentered the CMG3-T at LVC late in the day on 2001,229. Data quality has returned to normal. END **************************************************************************** DATA PROBLEM REPORT ASL2001:089 2001/07/09 ASL DCC Valerie Peyton ASL LSZ IU **/*** 2001,156,00:00:00 2001,181,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. Field engineers are on-site at LSZ, trying to get the station in operational order. Tests, calibrations, and general data anomalies are expected. END PROBLEM RESOLUTION REPORT ASL2001:089 2001/07/09 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION For the first time since late 1998, station LSZ is up and running! Live data are available over the LISS, and all station components are in working order. The field engineers left the site in fantastic working order on 2001,181. We hope the current station condition lasts a long time. END **************************************************************************** DATA PROBLEM REPORT ASL2001:098 2001/08/08 ASL DCC Valerie Peyton ASL DBIC GT SHZ 2001,214,23:50:00 2001,353,10:40:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. Data from the SHZ channel of the GS21 at DBIC are unuseable. The mass appears to be pegged. END PROBLEM RESOLUTION REPORT ASL2001:098 2001/12/20 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The GS21 at DBIC has been fixed. Data quality returns to normal as of 2001,353 10:40. END **************************************************************************** DATA PROBLEM REPORT ASL2001:099 2001/08/13 ASL DCC Valerie Peyton ASL SBA IU 00/*HN 2001,225,01:25:00 2001,225,19:04:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The N component of the CMG3-T at SBA is pegged. END PROBLEM RESOLUTION REPORT ASL2001:099 2001/08/13 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION We were able to recenter the CMG3-T at SBA from ASL. Data quality returns to normal roughly 18 hours after the problem began. Let's here it for the remote centering capability! END **************************************************************************** DATA PROBLEM REPORT ASL2001:096 2001/07/30 ASL DCC Valerie Peyton ASL TIXI IU 00/*HE 2001,209,20:58:00 2001,213,10:50:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The E component of the STS1 has fallen against one of the stops. END PROBLEM RESOLUTION REPORT ASL2001:096 2001/08/01 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The TIXI station operator was able to recenter the E component of the STS1. Data quality returns to normal on 2001,213. END **************************************************************************** DATA PROBLEM REPORT ASL2001:097 2001/08/02 ASL DCC Tyler Storm ASL TSUM IU 00/?HZ 2001,151,05:30:00 2001,155,08:30:00 Problem Description OTHER SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The data from the vertical STS-1 are unusable. END PROBLEM RESOLUTION REPORT ASL2001:097 2001/08/02 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION Instrument was reset 2001,155,08:30:00. END **************************************************************************** DATA PROBLEM REPORT ASL2001:094 2001/07/19 ASL DCC Tyler Storm ASL PTCN IU * 2000,095,10:00:00 2000,095,10:00:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 450 Time Uncertain. Timing is unreliable. END **************************************************************************** DATA PROBLEM REPORT ASL2001:095 2001/07/24 ASL DCC Valerie Peyton ASL SPA IU 10/*HN 2000,306,09:15:00 2000,307,07:35:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The N component of the CMG3-T (10) instrument at SPA was pegged by a series of spikes in the data (recorded in ASL2000:141). END PROBLEM RESOLUTION REPORT ASL2001:095 2001/07/24 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The station operator at SPA recentered the CMG3-T on 2000,307. Data quality has returned to normal. END **************************************************************************** DATA PROBLEM REPORT ASL2001:092 2001/07/12 ASL DCC Valerie Peyton ASL ANMO IU 10/*H2 2001,192,22:24:00 2001,193,16:30:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4600 Channel has low sensitivity.|90 On 2001,192, 22:24 the 2 component (nominal E) of the CMG3-T-B at ANMO lost half of the double-ended output. As a result, the response of this channel is now between 20 and 30dB lower than it should be (the sensitivity is now approximately 90% lower than it should be). The data may be useable with caution. END PROBLEM RESOLUTION REPORT ASL2001:092 2001/07/12 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Less than a day later a field engineer was able to correct the problem with the 2 component of the CMG3-T-B at ANMO. Data quality has returned to normal. END **************************************************************************** DATA PROBLEM REPORT ASL2001:093 2001/07/17 ASL DCC Valerie Peyton ASL BILL IU 00/*HE 2001,198,11:57:00 2001,200,21:49:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The E component of the STS-1 at BILL has fallen against a stop. END PROBLEM RESOLUTION REPORT ASL2001:093 2001/07/20 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The station operator recentered the E component of the STS-1 at BILL. Data quality has returned to normal. END **************************************************************************** DATA PROBLEM REPORT ASL2001:090 2001/07/09 ASL DCC Tyler Storm ASL KMBO IU HL?, LL?, 20/?L? 1995,260,00:00:00 2001,059,09:25:00 Problem Description Problem Description OTHER SEED COMMENT REFERENCE C 4400 Channel data quality is very poor. For several reasons over various time spans, data from the FBA-23 have basically been unuseable since installation. END PROBLEM RESOLUTION REPORT ASL2001:090 2003/10/06 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The FBA23 channel names at KMBO changed from *L* to *N* on 2001, 059. For the continuation of problems with the FBA23 at KMBO, please see ASL2001:091. END **************************************************************************** DATA PROBLEM REPORT ASL2001:091 2001/07/09 ASL DCC Tyler Storm ASL KMBO IU 20/HN?, 20/LN? 2001,059,09:46:00 2001,059,09:46:00 Problem Description OTHER SEED COMMENT REFERENCE C 4400 Channel data quality is very poor. Data from the FBA-23 are unuseable. At times, the E component of the FBA23 appears to be recording real events. Teleseisms are especially well-recorded on the E. However, there are other events recorded on the E that may not be real. With nothing being recorded on the N and Z components, the entire instrument is being considered unreliable. END **************************************************************************** DATA PROBLEM REPORT HRV1993:031 1993/08/23 Harvard WQC Misha Salganik ASL CCM IU BHN LHN UHN VHN 1989,209,00:00:00 1994,188,00:00:00 Problem Description DATA GLITCHES SEED COMMENT REFERENCE C 4525 Channel has spiking and other data glitches. The time of the glitches is the same for LHN and BHN. Postscript file available on dmc.iris.washington.edu cd pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1993:031 1993/10/04 ASL Tyler Storm Description of Problem Resolution COMMENT I have sent a message to CCM explaining the problem, and some troubleshooting ideas. If the station operator gets back to me with any information, I will pass it on in a supplemental report. SUPPLEMENT The N channel of the STS-1 was prone to data glitches which can be described as small-amplitude, narrow spikes from 1989,209 - 1994,188. These spikes appear to be digitizer-induced, perhaps a FIR filter impulse response. Initially, there are only one or two per day; by the beginning of 1993 they are appearing every 15 - 60 minutes. When the station was upgraded to an IRIS-2 system (1994,193) the digitizer was replaced and the data glitches disappeared. END **************************************************************************** DATA PROBLEM REPORT HRV1993:032 1993/08/23 Harvard WQC Misha Salganik ASL ENH CD BHN BHE BHZ 1993,000,65:03:05 1993,000,65:03:05 Problem Description DATA DROPOUTS Postscript file available on dmc.iris.washington.edu cd pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1993:032 1993/09/25 ASL Tyler Storm Description of Problem Resolution Comment Problem was caused by a very low voltage source making the recording system drop out. END **************************************************************************** DATA PROBLEM REPORT ASL2010:069 2010/03/25 ASL DCC Cory Gilbert ASL HNR IU 00/?HZ,00/?H1 2008,142,00:00:00 2008,142,00:00:00 Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE C 4400 Channel data quality is very poor. The vertical and ?H1 components of the 54000 are basically unusable as of now. Both have been suspect since the winter, but have had periods where at least some of the data was usable at times. The instrument will need to be replace on the next scheduled station visit. END PROBLEM RESOLUTION REPORT ASL2010:069 2010/05/03 ASL DCC Cory Gilbert Description of Problem Resolution RESOLUTION The STS-2 HG that was already on-site was installed in place of the 54000 until it can be removed from the borehole. An STS-2 SG was installed during the Q330 upgrade process. END **************************************************************************** DATA PROBLEM REPORT HRV1993:033 1993/08/23 Harvard WQC Misha Salganik ASL ERM II BHN 1993,000,60:01:39 1993,000,60:01:39 Problem Description DATA GLITCHES Postscript file available on dmc.iris.washington.edu cd pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1993:033 1993/09/29 IDA Holly Given Description of Problem Resolution Resolution We immediately noted three things about this report; first, the time of the glitch coincided exactly with a join between two station volumes (tapes). Secondly, there was is no glitch in the original data archived at the IDA Data Collection Center in CSS format. And thirdly, the problem seemed to effect only one stream. The problem was traced to a bug in the Steim compressor of the SEED writer supplied to the IDA DCC by the IRIS DMC. This bug affects a small percentage of data where the last sample in the last record in a continuous data stream is compressed incorrectly. The problem does not affect all data in the final record, but only occurs under certain circumstances (which is why only the high in NS channel was affected). Tim Ahern of the IRIS DMC has suggested that all affected data can be corrected at the IRIS DMC. Action taken by the IDA DCC was to correct the compressor code bug, but previously affected data will not be resent. ***************************************************************************** DATA PROBLEM REPORT HRV1993:034 93/08/23 Harvard WQC Misha Salganik ASL HIA CD BHZ BHN BHE 1993, 65, 3: 5 1993, 65, 3: 5 Problem Description DATA DROPOUTS The gap in the data exceeds 100 sec. Postscript file available on dmc.iris.washington.edu cd pub/qc/qc_ps END **************************************************************************** DATA PROBLEM REPORT HRV1993:035 1993/08/23 Harvard WQC Misha Salganik ASL KEV DW LHZ LHN LHE 1993,060,01:39:00 1993,148,00:00:00 Problem Description DATA DROPOUTS Gaps in the data exceed 10 sec. Postscript file available on dmc.iris.washington.edu cd pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1993:035 1993/09/28 ASL Tyler Storm Description of Problem Resolution RESOLUTION We have noticed this problem many times on several DWWSSN stations. The system will lose a long period record (5 min 30 sec) because of a failing piece of equipment, or sometimes for no apparent reason. It is a problem that we have lived with as the older stations are being replaced with IRIS equipment. The problem no longer exists in KEV data after 93,158 (IRIS-2 installation). No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT HRV1993:036 1993/08/23 Harvard WQC Misha Salganik ASL MDJ CD LHE 1993,065,03:05:00 1993,080,05:04:00 Problem Description LOW FREQUENCY NOISE LHE noise is similar to LHN noise for 1993/03/01. Postscript file available on dmc.iris.washington.edu cd pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1993:036 1993/09/25 ASL Tyler Storm Description of Problem Resolution COMMENT The problem was caused by faulty Remote Control and Test (RCT) electronics in the seismometer. For the full duration of the problem, please see HRV1993:016. END **************************************************************************** DATA PROBLEM REPORT HRV1993:037 1993/08/23 Harvard WQC Misha Salganik ASL MDJ CD BHN LHN VHN 1993,046,00:58:00 1993,063,06:43:00 Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE C 4510 Channel has frequent spiking. The LHN noise is similar to LHE noise ( 1993/03/12). Postscript file available on dmc.iris.washington.edu cd pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1993:037 1993/09/25 ASL Tyler Storm Description of Problem Resolution COMMENT Problem was caused by faulty Remote Control and Test (RCT) electronics in the seismometer. END **************************************************************************** DATA PROBLEM REPORT HRV1993:038 1993/08/23 Harvard WQC Misha Salganik ASL PMSA IU BHN BHE BHZ LHN LHE LHZ 1993,000,65:03:05 1993,000,65:03:05 Problem Description HIGH FREQUENCY NOISE Postscript file available on dmc.iris.washington.edu cd pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1993:038 1993/09/09 ASL Tyler Storm Description of Problem Resolution Comment The high frequency noise referred to is actually a dead channel (probably just unplugged from the seismometer at the time). Day 93,065 was during the test period of the station. As a result, technicians were still on site doing tests and calibrations. There is a comment for this time frame (93,062 - that states: TEST DATA - Calibration and testing in progress. We distribute this "test data" even though it has many flaws because the time periods the testing and calibration may be of some use. END **************************************************************************** DATA PROBLEM REPORT HRV1993:039 1993/08/23 Harvard WQC Misha Salganik ASL SNZO IU BHN BHZ BHE LHN LHZ LHE 1993,000,60:01:39 1993,000,60:01:39 Problem Description INCORRECT TIME Station clock is slow by 30-60 sec. The delay differs for the different days. Postscript file available on dmc.iris.washington.edu cd pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1993:039 1995/04/14 ASL Tyler Storm Description of Problem Resolution Resolution See Data Problem Resolution Report HRV1993:020. END **************************************************************************** DATA PROBLEM REPORT ASL2010:060 2010/03/24 ASL DCC Cory Gilbert ASL QIZ IC 00/?H? 2007,100,00:00:00 2007,100,00:00:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4630 Response may be invalid. There is a probable gain issue on the STS-2, but we can't tell for sure without a sensorloc analysis. END **************************************************************************** DATA PROBLEM REPORT ASL2010:065 2010/03/25 ASL DCC Cory Gilbert ASL KMBO IU 10/?H? 2010,079,00:00:00 2010,079,00:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. After a short gap in the data, all components of the STS-2 are producing only digitizer noise. END PROBLEM RESOLUTION REPORT ASL2010:065 2010/05/03 ASL DCC Cory Gilbert Description of Problem Resolution RESOLUTION This problem was resolved as a result of the Q330 upgrade process. END **************************************************************************** DATA PROBLEM REPORT ASL2010:066 2010/03/25 ASL DCC Cory Gilbert ASL KMBO IU 00/?HN 2010,018,13:00:00 2010,018,13:00:00 Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE C 4400 Channel data quality is very poor. There was a large pulse on all sensors around 13:00 UTC. Everything came back ok except for the N/S, which seems to be stuck in a ~180 sine wave of varying amplitude. END PROBLEM RESOLUTION REPORT ASL2010:066 2010/03/30 ASL DCC Cory Gilbert Description of Problem Resolution RESOLUTION The calibration that started on 2010,084 fixed the problem. We are still going to replace the sensor during the next station visit. END **************************************************************************** DATA PROBLEM REPORT ASL2010:067 2010/03/25 ASL DCC Cory Gilbert ASL ANTO IU 10/?N? 2006,111,00:00:00 2006,111,00:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The FBA at ANTO has not detected an event since 2006,111. I checked several event large events every year between then and now. END **************************************************************************** DATA PROBLEM REPORT ASL2010:068 2010/03/25 ASL DCC Cory Gilbert ASL CHTO IU 00/?H1,00/?H2 2009,280,00:00:00 2009,280,00:00:00 Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE C 4521 Channel displays regular pulsing. The 54000 horizontals go through period of really nasty pulsing. It has happened several times in the last few years. We are not sure about what is causing it, but it seems to go away on its own. Currently, the pulsing is not as bad as it was in October, but it is still present. END **************************************************************************** DATA PROBLEM REPORT ASL2010:061 2010/03/25 ASL DCC Cory Gilbert ASL DAV IU 00/?H? 1997,111,00:00:00 1997,111,00:00:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4625 Invalid instrument response. This instrument haas an amplitude dependent lowered response at longer periods. The effect is non-linear and is greater as the ground motion amplitude increases. Most likely this problem was caused by moisture in the feedback electronics box or the seismometer enclosure. The problem most like has become worse over time. Although we recognize this problem we do not have a good way to describe it in the dataless SEED at this time, but we are working on it. This problem gets worse through the years with the E/W component always being the worst, followed by the N/S then the vertical END **************************************************************************** DATA PROBLEM REPORT ASL2010:062 2010/03/25 ASL DCC Cory Gilbert ASL ULN IU 00/?H? 2004,100,00:00:00 2004,100,00:00:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4625 Invalid instrument response. This instrument has a potential amplitude dependent lowered response at longer periods on the horizontal components. The effect is non-linear and is greater as the ground motion amplitude increases. Most likely this problem was caused by moisture in the feedback electronics box or the seismometer enclosure. The problem most like has become worse over time. Although we recognize this problem we do not have a good way to describe it in the dataless SEED at this time, but we are working on it. END **************************************************************************** DATA PROBLEM REPORT ASL2010:063 2010/03/25 ASL DCC Cory Gilbert ASL GNI IU 00/?HN, 00/?HE 2005,100,00:00:00 2005,100,00:00:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4625 Invalid instrument response. This instrument has a potential amplitude dependent lowered response at longer periods on the horizontal components. The effect is non-linear and is greater as the ground motion amplitude increases. Most likely this problem was caused by moisture in the feedback electronics box or the seismometer enclosure. The problem most like has become worse over time. Although we recognize this problem we do not have a good way to describe it in the dataless SEED at this time, but we are working on it. END **************************************************************************** DATA PROBLEM REPORT ASL2010:064 2010/03/25 ASL DCC Cory Gilbert ASL KMBO IU 00/?HN 2007,001,00:00:00 2007,001,00:00:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4625 Invalid instrument response. This instrument has a potential amplitude dependent lowered response at longer periods on the. The effect is non-linear and is greater asthe ground motion amplitude increases. Most likely this problem was caused by moisture in the feedback electronics box or the seismometer enclosure. The problem most like has become worse over time. Although we recognize this problem we do not have a good way to describe it in the dataless SEED at this time, but we are working on it. END PROBLEM RESOLUTION REPORT ASL2010:064 2010/05/03 ASL DCC Cory Gilbert Description of Problem Resolution RESOLUTION This problem was resolved as a result of the Q330 upgrade process. END **************************************************************************** DATA PROBLEM REPORT HRV1993:020 1993/07/07 Harvard WQC Misha Salganik ASL SNZO IU BHZ BHE BHN LHZ LHE LHN 1993,000,13:18:50 1993,000,13:18:50 Problem Description INCORRECT TIME Clock is slow by 50-60 sec. The shift is time dependent. END PROBLEM RESOLUTION REPORT HRV1993:020 1993/08/09 ASL Tyler Storm Description of Problem Resolution Resolution Refer to DPR UW1993:005. END **************************************************************************** DATA PROBLEM REPORT HRV1993:021 1993/07/07 Harvard WQC Misha Salganik ASL YSS IU BHZ 1993,000,00:00:00 1904,020,41:00:00 Problem Description INVALID RESPONSE Deconvolution underestimates BHZ amplitude by 10 times. END PROBLEM RESOLUTION REPORT HRV1993:021 1993/07/20 ASL Tyler Storm Description of Problem Resolution The sensitivity value for YSS, BHZ channel had been stated at 9.965e09 V/M/S; the correct value is 9.965e08 V/M/S. The correction was made in the ASL data base Jun 93. END **************************************************************************** DATA PROBLEM REPORT ASL2010:058 2010/03/24 ASL DCC Cory Gilbert ASL LSA IC 20/?NN 2009,223,00:00:00 2009,223,00:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The N/S component of the FBA has been down since August of 2009. END **************************************************************************** DATA PROBLEM REPORT HRV1993:022 1993/07/07 Harvard WQC Misha Salganik ASL ESK II MHE 1993,000,36:07:15 1993,000,36:07:15 Problem Description DATA DROPOUTS Low amplitude signal. The channel is probably dead. END PROBLEM RESOLUTION REPORT HRV1993:022 1993/07/09 IDA Holly Given Description of Problem Resolution begins abruptly on 93:043 as previously reported in DPR IDA:93:001. The ?HE channels 'came back' on their own in the coda of a large transient signal on 93:064 approx 05:00. However beginning about 93:068, the ?HE channels began to show this gain reduction problem again intermittently, and the channels were 'flaky' until the station was visited on 93:132. The problem was traced to an analog mutiplexer in the older IDA data acquisition systems that allows the station operator to select a data stream to be displayed on an external voltmeter. After this was removed, normal operation was restored. **************************************************************************** DATA PROBLEM REPORT HRV1993:023 93/07/07 Harvard WQC Misha Salganik ASL KIV II BHN BHE 1993, 36, 7:15 1993, 49,10:10 Problem Description LOW FREQUENCY NOISE The channels are very noisy. END **************************************************************************** DATA PROBLEM REPORT ASL2010:059 2010/03/24 ASL DCC Cory Gilbert ASL LSA IC 00/?HN, 10/?HN 2009,190,00:00:00 2009,190,00:00:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4605 Channel has low sensitivity. There is a sensitivity difference on N/S component between the primary and secondary sensors. It's difficult to determine which one is the culprit without performing a sensorloc analysis. END **************************************************************************** DATA PROBLEM REPORT HRV1993:024 1993/07/07 Harvard WQC Misha Salganik ASL TLY II BHE,BHN 1993,000,36:07:15 1993,000,36:07:15 Problem Description DATA LOGGER PROBLEM We think that digitizer does not behave. END PROBLEM RESOLUTION REPORT HRV1993:024 1993/07/13 IDA Holly Given Description of Problem Resolution This problem appears to have first shown up on the station tape covering the period 93:039-045; we were made aware of it by data analysts at Obninsk on 93:088 and it was confirmed after data arrival here on 93:110. The symptoms are 'flat spots' on microseisms reminiscent of 'sticky bit' behavior, although not exactly like a classical 'sticky bit'. The problem is most pronounced on the E, less so on the N, and very minimal on Z. Recommended action from IDA engineering was to replace the A/D (DSP) board in the data acquisition unit. Spare boards were sent to Russia on 93:140. Daily plotouts of ground noise show that the problem disappeared sometime between 93:118 and 93:128 (a data gap prevents more accurate specification of the exact time). This is about the time VULCAN personnel visited the station and performed several maintenance tasks, implying that one of them apparently corrected the problem, although it is my understanding that the A/D board was not replaced as spares had not yet arrived. Plotouts from day 128 through 133 (the most recent data at IGPP) appear normal. However we continue to monitor this problem. >From a quick look at the data, my assessment is that this problem primarily affects low amplitudes (less than 200 counts) and is seen mostly in ground noise. Waveforms on large teleseisms are very minimally affected (e.g. 93:084:07:08; 93:109:21:09). To our knowledge, this behavior has not been observed elsewhere in the IRIS/IDA network. **************************************************************************** DATA PROBLEM REPORT HRV1993:025 1993/07/07 Harvard WQC Misha Salganik ASL GDH DW LHZ MHZ 1982,238,00:00:00 1993,293,00:00:00 Problem Description NOISE SEED COMMENT REFERENCE C 4500 Channel has high noise background. LHZ channel is noisier than horizontals. END **************************************************************************** DATA PROBLEM REPORT HRV1993:026 1993/08/14 Harvard WQC Misha Salganik ASL CHTO IU *HZ *HN *HE 1993,210,00:00:00 1993,239,05:12:00 Problem Description POLARITY REVERSED Data disagree with the CMT compatible sesmograms. END PROBLEM RESOLUTION REPORT HRV1993:026 1993/08/16 ASL Tyler Storm Description of Problem Resolution COMMENT Thank you for the notification; we were unaware of the problem. Luckily, we have a technician in the area to switch the polarities back to normal. The problem most likely occurred when CHTO underwent major repairs on 30 July 93. When we can verify a start time and end time (once the technician fixes the problem) I will file a supplement report. SUPPLEMENT The polarity reversals on the 36000I Z, E and N components at CHTO are being corrected in the dataless. To get correct polarities out, be sure to invoke the "Check Reversal" option in rdseed. END **************************************************************************** DATA PROBLEM REPORT HRV1993:027 1993/08/14 Harvard WQC Misha Salganik ASL SJG IU LHN LHE 1993,221,11:38:00 1993,223,14:17:00 Problem Description LOW FREQUENCY NOISE LHN is more noisy than LHE. END PROBLEM RESOLUTION REPORT HRV1993:027 1993/08/19 ASL Tyler Storm Description of Problem Resolution COMMENT SJG is very near a busy road. I have observed that during work hours at San Juan (11:00 - 22:00 UTC) the noise is consistantly higher. The problem is predominate on the north/south seismometer because the road is close to being directly south of the site. END **************************************************************************** DATA PROBLEM REPORT HRV1993:028 1993/08/14 Harvard WQC Misha Salganik ASL KIP IU BHE LHE VHE UHE 1993,208,06:07:00 1994,120,00:35:00 Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE C 4010 Channel is down. Low Frequency Noise END PROBLEM RESOLUTION REPORT HRV1993:028 1993/09/29 ASL Tyler Storm Description of Problem Resolution COMMENT All channels derived from the east/west seismometer are dead. This condition began at 1993, 208, 06:07 for the E component; at 1993, 225, 09:24 for the N and Z components; and still exists for all components. Also, there was a time period from approximately 1993,228 through 1993,261, 00:55 where all of the broad-band channels were down. It appears that the east/west seismometer, or something controlling it, was causing a power problem. After the east/west seismometer was disconnected (around 1993,261) the broad-band channels being derived from the vertical and north/south seismometers came back. The team on site is in the process of troubleshooting the east/west seismometer and the electronics controlling it. >PROBLEM RESOLUTION REPORT HRV1993:028 >1994/05/24 ASL Tyler Storm >Description of Problem Resolution >Supplemental > >KIP's east/west seismometer was replaced day 120, 1994. END **************************************************************************** DATA PROBLEM REPORT HRV1993:029 1993/08/23 Harvard WQC Misha Salganik ASL ALE II BHN BHE 1993,000,60:00:00 1993,000,60:00:00 Problem Description LOW FREQUENCY NOISE Postscript file available on dmc.iris.washington.edu cd pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1993:029 1993/08/27 IDA Holly Given Description of Problem Resolution Comment Inspection of plotouts of auxiliary diagnostic channels which record the temperature of the DA and AR units of the IRIS/IDA ALE system showed that a transient temperature change lasting several hours occurred in the early part of 1993:060. The transients in the BHE and BHN seismic channels (described as LOW FREQUENCY NOISE) appear to correlate with the last part of the temperature transient. VH* channels are affected more dramatically than BH*, and an effect on the mass position channels is also seen. This transient temperature change is observed periodically at ALE and most likely corresponds to staff entry into the recording building, or, an adjusment of thermostat within the recording building while staff work there. Although the vault portion of the building is maintained at below freezing, it is separated only by a wall from the recording room (where the DA and AR units are located) such that a change in the recording room temperature would couple into the vault until thermal stability there is restored. The temperature-related signal is low frequency and unlikely to affect many seismological studies. It seems to occur roughly once per week. No action will be taken. ***************************************************************************** DATA PROBLEM REPORT HRV1993:030 93/08/23 Harvard WQC Misha Salganik ASL BJI CD LHN LHE 1993, 60, 1:39 1993, 80, 5: 4 Problem Description LOW FREQUENCY NOISE Postscript file available on dmc.iris.washington.edu cd pub/qc/qc_ps Long period pulses. END **************************************************************************** DATA PROBLEM REPORT ASL2010:054 2010/03/24 ASL DCC Cory Gilbert ASL TEIG IU 20/?N? 2009,100,00:00:00 2009,100,00:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The N/S component of the FBA is dead, and the other two components both look like their sensitivities are elevated. All of these problems seem to go back into mid-2009, but it's tough to pin-point the exact dates. END **************************************************************************** DATA PROBLEM REPORT ASL2010:055 2010/03/24 ASL DCC Cory Gilbert ASL ENH IC 10/?H? 2009,320,00:00:00 2009,320,00:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4050 Channel not recording seismic data. The STS-2 has issues on all three components. The vertical component has massive long period noise. The horizontals are essentially dead. At first I thought it was a mass position issue, but has turned out to be something different altogether. A new sensor is en route. END **************************************************************************** DATA PROBLEM REPORT ASL2010:056 2010/03/24 ASL DCC Cory Gilbert ASL ENH IC 20/?N? 2009,223,00:00:00 2009,223,00:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The FBA data has been down since August of 2009. END **************************************************************************** DATA PROBLEM REPORT ASL2010:057 2010/03/24 ASL DCC Cory Gilbert ASL HIA IC 20/?N? 2009,223,00:00:00 2009,223,00:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The FBA has been down since August of 2009. END **************************************************************************** DATA PROBLEM REPORT ASL2010:050 2010/03/22 ASL DCC Cory Gilbert ASL DWPF IU ALL COMPONENTS 2009,264,00:00:00 2009,264,00:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE S 10 Station is down. The 54000 at DWPF is lost. It is producing only digitizer noise. END **************************************************************************** DATA PROBLEM REPORT ASL2010:051 2010/03/23 ASL DCC Cory Gilbert ASL COLA IU 20/?N1 2010,001,00:00:00 2010,001,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE C 4410 Channel data quality is poor. The E/W component of the episensor has developed a high level of noise, that in the case of the Chilean event, is basically burying the event signal. It's difficult to determine exactly when it started, but it was good late last year. END **************************************************************************** DATA PROBLEM REPORT ASL2010:052 2010/03/23 ASL DCC Cory Gilbert ASL FURI IU 20/?NE 2009,250,00:00:00 2009,250,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE C 4605 Channel has low sensitivity. The E/W component of the episensor displays a lowered response during the Chilean event. I see this back in the mid-2009. The other components look fine however. END **************************************************************************** DATA PROBLEM REPORT ASL2010:053 2010/03/23 ASL DCC Cory Gilbert ASL LSZ IU 10/?H? 2008,343,00:00:00 2008,343,00:00:00 Problem Description CHANNEL ORIENTATION SEED COMMENT REFERENCE C 1826 Instrument orientation is unknown. Upon first look during the Chilean event, it appears the STS-2 has been moved somehow off it's original orientation by as much as 40%. We are still investigating, and are not completely sure that the instrument has been moved, but for now everything points in that direction. END **************************************************************************** DATA PROBLEM REPORT HRV1993:010 1993/06/11 Harvard WQC Misha Salganik ASL WMQ IU LHZ 1992,313,03:43:00 1992,313,03:43:00 Problem Description HIGH FREQUENCY NOISE Frequent spiking. END PROBLEM RESOLUTION REPORT HRV1993:010 1993/06/23 ASL Tyler Storm Description of Problem Resolution Spiking at WMQ was being caused by a problem with the digitizer. The spiking continues until around 93,050, but it's not always on the same channels. We will investigate the high frequency noise, and take the appropriate action. END **************************************************************************** DATA PROBLEM REPORT HRV1993:011 1993/06/11 Harvard WQC Misha Salganik ASL YSS IU BHZ 1992,317,13:09:00 1992,317,13:09:00 Problem Description INVALID RESPONSE Small by the factor of 10 relative to LHZ after deconvolution END PROBLEM RESOLUTION REPORT HRV1993:011 1993/06/23 ASL Tyler Storm Description of Problem Resolution I had apparently entered the wrong value in the database. The BHZ sensitivity was changed from 9.965e09 to 9.965e08 (correct value) on 23 Jun 93. Thanks for the info. END **************************************************************************** DATA PROBLEM REPORT HRV1993:012 1993/06/11 Harvard WQC Misha Salganik ASL ZOBO IU LHN LHE LHZ 1992,309,01:59:00 1992,309,01:59:00 Problem Description INCORRECT TIME Poor fit to synthetic waveforms -timing END PROBLEM RESOLUTION REPORT HRV1993:012 1993/06/24 ASL Tyler Storm Description of Problem Resolution I agree, ZOBO did fit poorly for that earthquake; it appears that the data was timed about 14 seconds off. We were not aware of the problem, and looking back at the station logs for that time frame did not help me pinpoint when the error occurred. I did look at another event later on in the month and ZOBO's timing appeared to be good. No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT HRV1993:013 1993/07/07 Harvard WQC Misha Salganik ASL COL IU *HN *HZ 1993,020,02:29:00 1993,036,18:50:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE C 4010 Channel is down. The channels are dead. END PROBLEM RESOLUTION REPORT HRV1993:013 1993/07/20 ASL Tyler Storm Description of Problem Resolution TYPE??? COL was not recording any vertical or north/south channels from 19 Jan 93 through 5 Feb 93 due to a bad PC board (ASL Newsletter 35.2D). END **************************************************************************** DATA PROBLEM REPORT HRV1993:015 1993/07/07 Harvard WQC Misha Salganik ASL CHTO IU *** 1992,347,00:00:00 1993,016,00:00:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 451 Timing MAY be in error, as clock is unlocked. Clock is fast by 10-25 sec. The value of time shift is changing. END PROBLEM RESOLUTION REPORT HRV1993:015 1993/08/24 ASL Tyler Storm Description of Problem Resolution COMMENT There are no entries in the timing log from 12 Dec 92 through 15 Jan 93 for CHTO. Therefore we assume the clock was unlocked, and we cannot verify the timing during this period. SUPPLEMENT Looking at CHTO station records, the clock likely was unlocked from 1992,347 to 1993,016. Looking at the data, most of the events arrive within a few seconds of their predicted arrival times. But since the clock likely was unlocked, we cannot guarantee timing accuracy for this time period. END **************************************************************************** DATA PROBLEM REPORT HRV1993:016 1993/07/07 Harvard WQC Misha Salganik ASL MDJ CD BHE LHE VHE 1993,005,18:34:00 1993,088,08:04:00 Problem Description DATA GLITCHES SEED COMMENT REFERENCE C 4510 Channel has frequent spiking. Large amplitude glitches. END PROBLEM RESOLUTION REPORT HRV1993:016 1993/07/22 ASL Tyler Storm Description of Problem Resolution COMMENT Yes, we have noticed it also. The maintenance people at China were notified of the noise a few months ago. We haven`t seen the problem after 1993,090. SUPPLEMENT The spiking problem on the MDJ STS1 E component ended at 1993, 088, 08:04. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT HRV1993:017 1993/07/07 Harvard WQC Misha Salganik ASL MDJ IU LHN LHE 1993,036,07:15:00 1993,049,10:10:00 Problem Description DATA GLITCHES Large amplitude noise. END PROBLEM RESOLUTION REPORT HRV1993:017 1993/07/22 ASL DCC Tyler Storm Description of Problem Resolution COMMENT Same answer as an earlier report; refer to HRV1993:016. END **************************************************************************** DATA PROBLEM REPORT HRV1993:018 1993/07/07 Harvard WQC Misha Salganik ASL PFO II BHN,BHE,LHN,LHE 1993,000,00:00:00 1904,020,41:00:00 Problem Description HIGH FREQUENCY NOISE Noisy. END PROBLEM RESOLUTION REPORT HRV1993:018 1993/07/09 IDA Holly Given Description of Problem Resolution Inspection of plotouts at the IDA DCC revealed a variety of anomalous signals on all PFO components during the time period desribed, particularly from days 005-008, 017-018, on 025, 029-035, on 040, on 042, and on 043. Days 004,009-016,019-024, and 035-039 generally looked normal. There was intensive maintenance over during this period, mainly related to several episodes of vault flooding during the southern California rainy season which caused the seismometer bases to shift (baseplates were set on sand in a tray). On 93:006, the STS-1's were removed, the vault was dried out, and sensors were reinstalled. On 93:007, a calibration was run. Water got in the vault again sometime around days 017-018. The system was shut off from 040-042 and STS-1's were moved to aluminum baseplates on micrometer legs in order to minimize the effect of a small amount of water in the vault. Sometime during the time period in the Problem Report trenching was done around the IDA vault in order to try and reroute drainage away from the vault which appears to have been sucessful as the vault remained dry during subsequent storms. Also, sometime around day 030, drilling was done in the vault with a hand drill for a new cable run for the LaCoste gravimeter. Also, during various times of the flooding, a dehumidifier was operating in the vault and caused periodic noise, particularly on horizontal channels. Note that all these effects will be apparent in PFO TERRAscope data as well since both systems share the IDA STS-1's. END **************************************************************************** DATA PROBLEM REPORT HRV1993:019 1993/07/07 Harvard WQC Misha Salganik ASL SLR IU LHN LHE LHZ 1993,000,10:14:39 1993,000,10:14:39 Problem Description INCORRECT TIME Clock is fast by 10 sec approximately. END PROBLEM RESOLUTION REPORT HRV1993:019 1993/08/09 ASL Tyler Storm Description of Problem Resolution Comment We did not have good timing information for the SLR tape covering the time in question; therefore, we "counted records" (this process is explained in PRR HRV1993:009). The timing setup at SLR is not optimal and there are no plans for upgrade there is now a new station, BOSA, that is in the same area. Since BOSA (Boshof, South Africa) will effectively be replacing SLR we will no longer be formally supporting SLR. As a result, the timing will most likely be questionable for the remainding time the station is operational. END **************************************************************************** DATA PROBLEM REPORT ASL2010:080 2010/03/26 ASL DCC Cory Gilbert ASL SSE IC 10/?H? 2008,261,00:00:00 2008,261,00:00:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4625 Invalid instrument response. The STS2 sensitivity is low as of 09/18/2008. The vertical component is the certainly the worst of the three, but the horizontals are low as well. END **************************************************************************** DATA PROBLEM REPORT ASL2010:081 2010/04/05 ASL DCC Cory Gilbert ASL SSPA IU 10/?H? 2010,091,00:00:00 2010,091,00:00:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The instrument response over the M7.2 event on Easter is wrong. After some investigation, I determined that the instrument is close to being against its stops, causing the instrument to clip. It needs to be re-centered. END PROBLEM RESOLUTION REPORT ASL2010:081 2010/04/05 ASL DCC Cory Gilbert Description of Problem Resolution RESOLUTION The STS-2 was re-centered on 2010,095,17:26:47 and mass postitions are normal again. END **************************************************************************** DATA PROBLEM REPORT ASL2010:082 2010/04/05 ASL DCC Cory Gilbert ASL TEIG IU 10/?H? 2010,093,03:15:31 2010,093,03:15:31 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. As of 2010,093 the CMG is producing only digitizer noise. I checked the mass positions and they seem to be ok, so I think something else is going on. END PROBLEM RESOLUTION REPORT ASL2010:082 2010/04/14 ASL DCC Cory Gilbert Description of Problem Resolution RESOLUTION The station was visited by the operator on 2010,104. I am unsure of exactly what he did, but the CMG is working normally again. END **************************************************************************** DATA PROBLEM REPORT ASL2010:087 2010/04/13 ASL DCC Cory Gilbert ASL KMBO IU ALL CHANNELS 2010,102,00:00:00 2010,102,00:00:00 Problem Description OTHER There is a field crew on-site for the next 8-10 days performing the Q330 upgrade. END PROBLEM RESOLUTION REPORT ASL2010:087 2010/05/03 ASL DCC Cory Gilbert Description of Problem Resolution RESOLUTION The field crew finished the Q330 upgrade process is enroute back home. END **************************************************************************** DATA PROBLEM REPORT ASL2010:088 2010/04/13 ASL DCC Cory Gilbert ASL SJG IU ALL CHANNELS 2010,103,00:00:00 2010,103,00:00:00 Problem Description OTHER There is a field crew on-site for the next 8-10 days performing the Q330 upgrade. END **************************************************************************** DATA PROBLEM REPORT ASL2010:089 2010/04/14 ASL DCC Cory Gilbert ASL KMI IC 10/?HE 2008,133,06:00:00 2008,133,06:00:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4605 Channel has low sensitivity. After a large event on 2008,133,06:00 the E/W component of the STS-2 shows a large loss in sensitivity. It looks to be around 3-4 dB. END **************************************************************************** DATA PROBLEM REPORT ASL2010:083 2010/04/08 ASL DCC Tyler Storm ASL PMG IU 10/?HZ 2008,132,00:00:00 2009,160,00:00:00 Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE C 4521 Channel displays regular pulsing. Low-frequency pulses increased the background noise level during this time frame. END **************************************************************************** DATA PROBLEM REPORT ASL2010:084 2010/04/08 ASL DCC Tyler Storm ASL PMG IU 00/?HN 2009,154,00:00:00 2009,197,00:00:00 Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE C 4521 Channel displays regular pulsing. Low-frequency pulses increased the background noise level during this time frame. END **************************************************************************** DATA PROBLEM REPORT ASL2010:085 2010/04/08 ASL DCC Tyler Storm ASL AFI IU ??/*H* 2010,054,00:00:00 2010,054,00:00:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4625 Invalid instrument response. Current sensitivities are in error. We are waiting for the SensOrLoc data (in a return shipment) in order to make the sensitivity adjustments. These data could not be transferred in the field due to technical difficulties. END **************************************************************************** DATA PROBLEM REPORT ASL2010:086 2010/04/08 ASL DCC Tyler Storm ASL PAYG IU 00/?H1, 00/?H2 2008,001,00:00:00 2008,001,00:00:00 Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE C 4509 Channel has elevated low frequency noise levels. Low-frequency pulses increased the background noise level during this time frame. END **************************************************************************** DATA PROBLEM REPORT HRV1993:001 1993/03/26 Harvard WQC Misha Salganik HARVARD COL IU LPZ LPN 1900,000,00:00:00 1993,065,00:00:00 Problem Description INCORRECT TIME Time shift is as large as 1 minute. END PROBLEM RESOLUTION REPORT HRV1993:001 1993/05/07 ASL Tyler Storm Description of Problem Resolution TYPE??? The clock was set wrong at COL on 5 Feb 93; refer to problem report UW1993:019 for more info. END **************************************************************************** DATA PROBLEM REPORT HRV1993:002 1993/01/01 Harvard WQC Misha Salganik GOPHER ANMO IU LHN LHE LHZ 1993,095,04:00:00 1993,095,04:00:00 Problem Description INVALID RESPONSE Amplitude of the signal is larger than expected. END PROBLEM RESOLUTION REPORT HRV1993:002 1993/05/07 ASL Tyler Storm Description of Problem Resolution At this time I can't find what is invalid in the response. Our files contain the poles and zeros for a modified KS36000, the digital coefficients for the FIR filters associated with a Martin Marietta data logger, and sensitivities of about 4.00e+09. Could you please get back to me with some more specifics on what part of the response could have the error? Thanks. END **************************************************************************** DATA PROBLEM REPORT HRV1993:003 1993/04/16 Harvard WQC Misha Salganik GOPHER COL IU LHN LHE LHZ 1993,106,00:00:00 1993,106,00:00:00 Problem Description INCORRECT TIME Station time is delayed for 60 sec. END PROBLEM RESOLUTION REPORT HRV1993:003 1993/05/07 ASL Tyler Storm Description of Problem Resolution TYPE??? The clock was set wrong at COL on 5 Feb 93; refer to problem report UW1993:019 for more info. END **************************************************************************** DATA PROBLEM REPORT HRV1993:004 1993/04/16 Harvard WQC Misha Salganik GOPHER CCM IU LHN LHE LHZ 1993,099,09:00:00 1993,111,00:00:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 452 Timing IS in error, as clock is unlocked. Station time is advanced for 50 sec. END PROBLEM RESOLUTION REPORT HRV1993:004 1993/06/25 ASL Tyler Storm Description of Problem Resolution TYPE??? SAME AS UW1993:027 On 9 Apr 1993 09:00Z lightning hit the receiver that provides a timing signal for CCM. The system was on internal timing until 20 Apr 1993 when the problem was corrected. As a result, from 9 Apr through 20 Apr the timing could be up to a minute off. After 20 Apr the timing should be back to normal (an event on 28 Apr 1993 was checked, and timing was good). END **************************************************************************** DATA PROBLEM REPORT HRV1993:005 1993/01/01 Harvard WQC Misha Salganik GOPHER ANTO IU LHN LHE LHZ 1993,137,23:20:00 1993,138,10:19:00 Problem Description INCORRECT TIME Time mark is nearly 10 sec ahead. END PROBLEM RESOLUTION REPORT HRV1993:005 1993/09/24 ASL Tyler Storm Description of Problem Resolution Comment The timing at ANTO is unreliable. Refer to problem resolution report HRV1993:055. END **************************************************************************** DATA PROBLEM REPORT HRV1993:006 1993/06/11 Harvard WQC Misha Salganik ASL NNA II LHN LHE LHZ 1993,365,20:17:00 1993,365,20:17:00 Problem Description INCORRECT TIME Poor fit to synthetic waveforms - timing # Incorrect time in above report noted, email sent to Harvard END PROBLEM RESOLUTION REPORT HRV1993:006 1993/08/27 IDA Holly Given Description of Problem Resolution COMMENT Inspection of plotouts from the station volume in the Data Problem Report showed that NNA appeared to be operating more or less normally. However this was an abnormally long tape during which there were many power outages at the station longer than the back-up capacity. Still, the system clock at NNA is a GOES (satellite) clock and always indicated locked condition. Also, the plots of +/- 30 sec around P wave JB times of teleseisms in the PDE catalog showed a normal scatter (+/- 2-3 seconds), which is another indication that the timing was not off significantly (the 4-5 s suggested by the DPR). Thus I cannot find any independent indications that suggest a clock problem at NNA for that time. The Global Seismology group at IGPP will look at this event soon and if we learn more we'll file a supplement. # Please! NNA belongs to the IRIS/IDA Network (II), not the IRIS # University Network (IU). END **************************************************************************** DATA PROBLEM REPORT HRV1993:007 1993/06/11 Harvard WQC Misha Salganik ASL RPN IU BHN,BHE,BHZ 1992,354,06:44:00 1992,354,06:44:00 Problem Description Observed 2-4 times too small - response problem END END **************************************************************************** DATA PROBLEM REPORT HRV1993:008 1993/06/11 Harvard WQC Misha Salganik ASL SNZO IU LHN LHE LHZ BHN BHE BHZ 1992,309,01:59:00 1992,359,12:14:00 Problem Description INCORRECT TIME Clock slow by 10-20 sec END PROBLEM RESOLUTION REPORT HRV1993:008 1993/08/06 ASL Tyler Storm Description of Problem Resolution Resolution From 92,247 through 92,313 the clock at SNZO was unlocked. During this period the timing is off up to 16 seconds. END **************************************************************************** DATA PROBLEM REPORT HRV1993:009 1993/06/11 Harvard WQC Misha Salganik ASL TAU IU BHN BHE BHZ LHN LHE LHZ 1992,313,03:43:00 1992,313,03:43:00 Problem Description INCORRECT TIME Clock fast by approx 20 sec. END PROBLEM RESOLUTION REPORT HRV1993:009 1993/06/23 ASL Tyler Storm Description of Problem Resolution There is a problem with the timing system at TAU and the data basically comes in without any timing information. Our data processing personnel look at the start time on the tape and count the continuous LP records in order to apply an approximate time to the data. The timing is not accurate enough to be used for event determination. No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT ASL2010:070 2010/03/25 ASL DCC Cory Gilbert ASL LVC IU 20/HN? 2010,058,00:00:00 2010,058,00:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The episensor did not trigger on the Chilean event. However it did trigger on a few events last year. The first was a M8.1 event at 95.8 arc degrees away. The second was a M6.6 event at 3.6 arc degrees away. By comparison, the Chilean event from earlier this year was a M8.8 at 13.8 arc degrees away. END **************************************************************************** DATA PROBLEM REPORT ASL2010:071 2010/03/25 ASL DCC Cory Gilbert ASL OTAV IU 20/HN? 2010,058,00:00:00 2010,058,00:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The episensor did not trigger on the Chilean event from earlier this year. I went back and checked a few large events from last year, and it didn't trigger then either. However, the Chilean event caused the STS-2 instrument to clip. I would've expected the episensor to trigger in this instance. END **************************************************************************** DATA PROBLEM REPORT ASL2010:076 2010/03/25 ASL DCC Cory Gilbert ASL TEIG IU 00/?H1 2006,340,00:00:00 2006,340,00:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The ?H1 component of the 36000 is down as of 2006,340. END **************************************************************************** DATA PROBLEM REPORT ASL2010:077 2010/03/25 ASL DCC Cory Gilbert ASL WCI IU 00/?HZ 2009,209,00:00:00 2009,209,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE C 4625 Invalid instrument response. This instrument has a probable amplitude dependent lowered response at longer periods. The effect is non-linear and is greater as the ground motion amplitude increases. Most likely this problem was caused by moisture in the feedback electronics box or the seismometer enclosure. The problem has most likely becomeworse over time. Although we recognize this problem we do not have a good way to describe it in the dataless SEED at this time, but we are working on it. END **************************************************************************** DATA PROBLEM REPORT ASL2010:078 2010/03/26 ASL DCC Cory Gilbert ASL PASC CI 00/?HN 2010,058,00:00:00 2010,058,00:00:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4625 Invalid instrument response. The N/S component of the STS-1 has a potential problem with moisture in the components. Further analysis is needed to determine exactly when the problem started, but it was quite evident during the Chilean event. We will continue to investigate and update as necessary. END **************************************************************************** DATA PROBLEM REPORT ASL2010:079 2010/03/26 ASL DCC Cory Gilbert ASL BJT IC 00/BHZ 2007,272,00:00:00 2007,272,00:00:00 Problem Description HIGH FREQUENCY NOISE SEED COMMENT REFERENCE C 4508 Channel has high levels of high frequency noise. The vertical component has high frequency noise above 2Hz END **************************************************************************** DATA PROBLEM REPORT ASL2010:072 2010/03/25 ASL DCC Cory Gilbert ASL RCBR IU 20/?N? 2010,058,00:00:00 2010,058,00:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The episensor did not trigger on the Chilean event from earlier this year. I went back and checked a few large events from last year, and it didn't trigger then either. However, the Chilean event caused the STS-2 instrument to clip. I would've expected the episensor to trigger in this instance. END **************************************************************************** DATA PROBLEM REPORT ESMT2010:001 2010/10/14 OSU-MT Anna Kelbert ES CAN06 EM * 2010,255,11:50:00 2010,279,16:33:00 Problem Description DEAD CHANNEL Dead Hz channel throughout END **************************************************************************** DATA PROBLEM REPORT ASL2010:073 2010/03/25 ASL DCC Cory Gilbert ASL SAML IU 20/HN? 2010,058,00:00:00 2010,058,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE C 4010 Channel is down. The episensor did not trigger on the Chilean event from earlier this year. I could not go back and check events from last year because the station did not come up till late in the year. However, the Chilean event caused the STS-2 instrument to clip. I would've expected the episensor to trigger in this instance. END **************************************************************************** DATA PROBLEM REPORT ASL2010:074 2010/03/25 ASL DCC Cory Gilbert ASL SDV IU 20/HN? 2010,058,00:00:00 2010,058,00:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The episensor did not trigger on the Chilean event from earlier this year. I could not go back and check events from last year because the station did not come up till early this year. However, the Chilean event caused the STS-2 instrument to clip. I would've expected the episensor to trigger in this instance. END **************************************************************************** DATA PROBLEM REPORT ASL2010:075 2010/03/25 ASL DCC Cory Gilbert ASL KIP IU 00/?HN,00/?HE 2007,300,00:00:00 2007,300,00:00:00 Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE C 4521 Channel displays regular pulsing. Beginning in late 2007, there are some pulses showing up randomly in the data from the horizontal components of the primary sensor. They have grown worse over time and are affecting the background noise level of the station, however there doesn't seem to be any kind of noticable period to them, making them difficult to describe. We believe there is moisture in the system somewhere, hopefully and once the station gets upgraded the pulsing will go away. END **************************************************************************** DATA PROBLEM REPORT ESMT2010:002 2010/10/14 OSU-MT Anna Kelbert ES CAP01 EM * 2010,204,00:00:00 2010,214,00:00:00 Problem Description CHANNEL ORIENTATION NIMS magnetometer was misoriented so that Hx (not Hy) was close to 0 nT. Thus, Hx was pointing West and Hy was pointing North. At OSU, magnetic fields were rotated so that Hx points North. The archived time series have correct channel orientation. END PROBLEM RESOLUTION REPORT ESMT2010:002 2010/10/14 OSU-MT Anna Kelbert Description of Problem Resolution Description of Problem Resolution RESOLUTION At OSU, magnetic fields were rotated so that Hx points North. The archived time series have correct channel orientation. END **************************************************************************** DATA PROBLEM REPORT DMCQC2011:0068 2011/12/02 IRIS DMC Peggy Johnson DMC F37A TA ?HE 2011,240,00:00:00 2011,269,00:00:00 Problem Description OTHER E recorded low amplitudes since installation. END PROBLEM RESOLUTION REPORT DMCQC2011:0068 2011/12/02 IRIS DMC Peggy Johnson Description of Problem Resolution RESOLUTION Replacement of the digitizer resulted in expected amplitudes. END **************************************************************************** DATA PROBLEM REPORT ASL2010:029 2010/01/25 ASL DCC Cory Gilbert ASL TUC IU ALL CHANNELS 2009,148,19:00:00 2006,181,00:00:00 Problem Description OTHER This station has been upgraded to a Q330 digitizer. New metadata are available. An Episensor was installed in place of the FBA. A CMG was installed in addition to the pre-existing STS-1. END **************************************************************************** DATA PROBLEM REPORT HRV1993:073 1993/10/16 Harvard WQC Misha Salganik ASL RPV TS LHN LHE BHN BHE 1993,150,17:08:00 1993,150,17:08:00 Problem Description LOW FREQUENCY NOISE Postscript file was placed into /pub/qc/qc_ps. END PROBLEM RESOLUTION REPORT HRV1993:073 1993/11/15 ASL Tyler Storm Description of Problem Resolution Resolution The low frequency noise at RPV is probably caused by the station location (very close to the coastline). END **************************************************************************** DATA PROBLEM REPORT HRV1993:074 1993/10/16 Harvard WQC Misha Salganik ASL TUC IU LHN LHE BHN BHE 1993,145,23:16:00 1993,145,23:16:00 Problem Description LOW FREQUENCY NOISE Postscript file was placed into /pub/qc/qc_ps. END PROBLEM RESOLUTION REPORT HRV1993:074 1994/04/10 ASL Tyler Storm Description of Problem Resolution Comment This is the normal background noise level for TUC at that time of the day. END **************************************************************************** DATA PROBLEM REPORT HRV1993:075 1993/10/16 Harvard WQC Misha Salganik ASL YSS IU LHN LHE BHN BHE 1993,149,06:50:00 1993,149,06:50:00 Problem Description LOW FREQUENCY NOISE Postscript file was placed into /pub/qc/qc_ps. END PROBLEM RESOLUTION REPORT HRV1993:075 1994/01/07 ASL Tyler Storm Description of Problem Resolution Resolution The noise levels seen on the horizontal data at YSS are somewhat higher than normal due to the location. However, the extra high noise levels seen in this example appear to be caused by cultural noise. There is a significant noise increase in the 8hr period from approximately 21:00 UTC through 5:00 UTC (normal working hours). END **************************************************************************** DATA PROBLEM REPORT DMCQC2011:0066 2011/12/02 IRIS DMC Peggy Johnson DMC J17A TA ?HZ 2009,112,13:00:00 2009,115,00:08:00 Problem Description OTHER On d 112 at 13:00 the E component experienced a sudden DC offset drop of about 2000 counts. This was accompanied by a drop in amplitude, though maybe not as much as a factor of 2. In the preceding 21 seconds, amplitudes decreased and fluctuated, which may or may not be related or indicative of the imminent failure. MRC at 1534 day 114 did not restore the DC level nor amplitudes. END PROBLEM RESOLUTION REPORT DMCQC2011:0066 2011/12/02 IRIS DMC Peggy Johnson Description of Problem Resolution RESOLUTION A calibration d 115 00:07:16 restored the Z component to normal operation. END **************************************************************************** DATA PROBLEM REPORT DMCQC2011:0067 2011/12/02 IRIS DMC Peggy Johnson DMC N02C TA ?HZ 2005,336,00:00:00 2007,223,19:42:00 Problem Description OTHER Z recorded low amplitudes. END PROBLEM RESOLUTION REPORT DMCQC2011:0067 2011/12/02 IRIS DMC Peggy Johnson Description of Problem Resolution RESOLUTION Replacement of the digitizer resulted in expected amplitudes. END **************************************************************************** DATA PROBLEM REPORT HRV1993:076 1993/10/16 Harvard WQC Misha Salganik ASL ZOBO AS LHZ LHN LHE 1993,150,17:08:00 1993,150,17:08:00 Problem Description DATA DROPOUTS Postscript file was placed into /pub/qc/qc_ps. END PROBLEM RESOLUTION REPORT HRV1993:076 1993/11/04 ASL Tyler Storm Description of Problem Resolution Resolution The dropouts occurred from approximately day 93,142 through 93,172. The problem was caused by a bad tape deck that was only writing out about half of the data to tape. END **************************************************************************** DATA PROBLEM REPORT ASL2010:025 2010/01/25 ASL DCC Cory Gilbert ASL TARA IU ALL CHANNELS 2009,317,00:10:27 2006,181,00:00:00 Problem Description OTHER This station has been upgraded to a Q330 digitizer. New metadata are available. An Episensor was installed in place of the FBA. The primary STS-2-HG was replaced with another STS-2-HG. END **************************************************************************** DATA PROBLEM REPORT HRV1993:077 1993/11/17 Harvard WQC Misha Salganik ASL BJI CD LHN LHE 1993,169,17:57:00 1993,169,17:57:00 Problem Description POLARITY REVERSED END PROBLEM RESOLUTION REPORT HRV1993:077 1994/09/21 ASL Tyler Storm Description of Problem Resolution SUPPLEMENT All of the broad-band N/S, and E/W channels at BJI had reversed polarities from 93, 161 until the station was moved on 94, 105. No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT ASL2010:026 2010/01/25 ASL DCC Cory Gilbert ASL TATO IU ALL CHANNELS 2009,265,13:56:41 2006,181,00:00:00 Problem Description OTHER This station has been upgraded to a Q330 digitizer. New metadata are available. An Episensor was installed in place of the FBA. An STS-2-SG was installed in place of the previous STS-2. END **************************************************************************** DATA PROBLEM REPORT HRV1993:078 1993/11/17 Harvard WQC Misha Salganik ASL BAR TS BHZ BHN 1993,169,17:57:00 1993,169,17:57:00 Problem Description OTHER END PROBLEM RESOLUTION REPORT HRV1993:078 1994/04/10 ASL Tyler Storm Description of Problem Resolution Comment This data was on the first tape we received from BAR. I would imagine the square wave we see was some sort of calibration or test. END **************************************************************************** DATA PROBLEM REPORT ASL2010:027 2010/01/25 ASL DCC Cory Gilbert ASL TRQA IU ALL CHANNELS 2009,139,20:00:00 2006,181,00:00:00 Problem Description OTHER This station has been upgraded to a Q330 digitizer. New metadata are available. An Episensor was installed in place of the FBA. The existing CMG was replaced with another CMG. END **************************************************************************** DATA PROBLEM REPORT HRV1993:079 1993/11/17 Harvard WQC Misha Salganik ASL CCM IU LHN BHN 1993,169,17:57:00 1993,169,17:57:00 Problem Description DATA GLITCHES We would like to remind you about the problem.Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1993:079 1993/11/19 ASL Tyler Storm Description of Problem Resolution COMMENT At this time, we do not know what is causing the data glitches. The CCM operater will be returning from Adak, Alaska soon. Hopefully we will have more luck and we will file a supplemental report once he is back on site. SUPPLEMENT For more information on this problem, and the full time span, please see the PRR for HRV1993:031. END **************************************************************************** DATA PROBLEM REPORT ASL2010:028 2010/01/25 ASL DCC Cory Gilbert ASL TSUM IU ALL CHANNELS 2008,260,10:00:00 2006,181,00:00:00 Problem Description OTHER This station has been upgraded to a Q330 digitizer. New metadata are available. An Episensor was installed in place of the FBA. Existing STS-2-HG was replaced with a new STS-2-HG. END **************************************************************************** DATA PROBLEM REPORT ASL2005:124 2005/08/25 ASL DCC Valerie Peyton ASL QSPA IU 20/*H* 2005,236,05:14:00 2005,237,20:51:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. All three compnents of the STS2 at QSPA have fallen against their stops. Very large events are still visible, but data should be used with caution. END PROBLEM RESOLUTION REPORT ASL2005:124 2005/08/25 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION We were able to remotely recenter the QSPA STS2. Data quality returns to normal at 2005, 237, 20:51. END **************************************************************************** DATA PROBLEM REPORT ASL2005:125 2005/08/29 ASL DCC Valerie Peyton ASL KBS IU 10/*H* 2005,237,16:03:00 2005,241,15:45:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. All three compnents of the STS2 at KBS have fallen against their stops. Very large events are still visible, but data should be used with caution END PROBLEM RESOLUTION REPORT ASL2005:125 2005/08/31 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The KBS station operator was able to recenter the STS2. Data quality returns to normal at 2005, 241, 15:45. END **************************************************************************** DATA PROBLEM REPORT HRV96:020 1996/06/04 Harvard WQC Misha Salganik SPYDER NIL II LHE LHZ 1996,155,08:15:00 1996,155,08:15:00 Problem Description LOW FREQUENCY NOISE Postscript file was placed into /pub/qc/qc_ps. # END **************************************************************************** DATA PROBLEM REPORT ASL2005:122 2005/08/22 ASL DCC Valerie Peyton ASL RSSD IU 00/*HZ 2005,233,22:19:00 2005,234,00:04:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4625 Invalid instrument response. The Z component of the RSSD 54000 had a strange problem with its response during this time period. Data should be considered suspect. END PROBLEM RESOLUTION REPORT ASL2005:122 2005/08/22 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The Z component of the RSSD 54000 recovered on its own. The instrument response returns to normal at 2005, 234, 00:04. END **************************************************************************** DATA PROBLEM REPORT ASL2005:123 2005/08/25 ASL DCC Valerie Peyton ASL SDV IU */* 2005,236,03:36:00 2005,238,19:34:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 454 Timing MAY be in error, as GPS system is not operating consistently. The GPS system at SDV was not able to obtain a solid lock on the GPS satellites during this time. This caused the GPS system to not operate consistently, and produced timing jumps. Data should be used with caution. END PROBLEM RESOLUTION REPORT ASL2005:123 2005/08/31 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The SDV GPS timing system recovered at 2005, 238, 19:34. Timing quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2005:120 2005/08/10 ASL DCC Valerie Peyton ASL QSPA IU 20/*HZ 20/*HE 2005,221,16:31:00 2005,223,22:23:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The Z and E channels of the STS2 at QSPA have lost mass capture. Only very large events are visible. Data should be used with caution. END PROBLEM RESOLUTION REPORT ASL2005:120 2005/08/11 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION We were able to remotely recenter the QSPA STS2. Both the Z and E components recovered mass position sufficiently for data quality to return to normal at 2005, 223, 22:23. END **************************************************************************** DATA PROBLEM REPORT ASL2005:121 2005/08/10 ASL DCC Valerie Peyton ASL PMSA IU *HE 1993,272,17:08:00 1993,275,00:35:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The E component of the STS1 at PMSA was dead during this time period. END PROBLEM RESOLUTION REPORT ASL2005:121 2005/08/10 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The E component of the STS1 at PMSA recovered at 1993, 275, 00:35. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT DMCQC2011:0060 2011/10/27 IRIS DMC Gillian Sharer DMC W37A TA * 2010,328,19:30:00 2010,330,16:16:00 Problem Description DEAD CHANNEL Due to flooding, TA.W37A was non-seismic from 2010 day 328 19:30- day 330 16:16 UTC. END PROBLEM RESOLUTION REPORT DMCQC2011:0060 2011/10/27 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The station was removed after it was determined to be unserviceable. END **************************************************************************** DATA PROBLEM REPORT ASL2010:021 2010/01/25 ASL DCC Cory Gilbert ASL RSSD IU ALL CHANNELS 2009,252,00:00:00 2006,181,00:00:00 Problem Description OTHER This station has been upgraded to a Q330 digitizer. New metadata are available. An Episensor was installed in place of the FBA. END **************************************************************************** DATA PROBLEM REPORT DMCQC2011:0061 2011/11/11 IRIS DMC Gillian Sharer DMC 638A TA * 2011,228,15:22:00 2011,310,15:40:00 Problem Description INVALID RESPONSE TA.638A masses began drifting rapidly on 2011 day 228 15:22 UTC. On day 255 the station stopped responding to mass recenters. VM2 quickly hit the stops and VM3 followed suit by day 262. Data is unreliable during this time period. END PROBLEM RESOLUTION REPORT DMCQC2011:0061 2011/11/11 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The station was removed on 2011 day 310 15:40 UTC. The removal report noted that there was 2 inches of water in the vault. END **************************************************************************** DATA PROBLEM REPORT ASL2010:022 2010/01/25 ASL DCC Cory Gilbert ASL SAML IU ALL CHANNELS 2009,318,00:00:00 2006,181,00:00:00 Problem Description OTHER This station has been upgraded to a Q330 digitizer. New metadata are available. An Episensor was installed in place of the FBA. END **************************************************************************** DATA PROBLEM REPORT ASL2010:023 2010/01/25 ASL DCC Cory Gilbert ASL SDV IU ALL CHANNELS 2010,017,00:00:00 2006,181,00:00:00 Problem Description OTHER This station has been upgraded to a Q330 digitizer. New metadata are available. An Episensor was installed in place of the FBA. END **************************************************************************** DATA PROBLEM REPORT ASL2010:024 2010/01/25 ASL DCC Cory Gilbert ASL SFJD IU ALL CHANNELS 2008,264,00:00:00 2006,181,00:00:00 Problem Description OTHER This station has been upgraded to a Q330 digitizer. New metadata are available. An Episensor was installed in place of the FBA. END **************************************************************************** DATA PROBLEM REPORT DMCQC2011:0064 2011/12/02 IRIS DMC Peggy Johnson DMC H15A TA ?HN 2008,292,00:00:00 2008,320,00:00:00 Problem Description OTHER N recorded low amplitudes. END PROBLEM RESOLUTION REPORT DMCQC2011:0064 2011/12/02 IRIS DMC Peggy Johnson Description of Problem Resolution RESOLUTION Sensor replacement resulted in expected amplitudes. END **************************************************************************** DATA PROBLEM REPORT HRV1993:080 1993/11/17 Harvard WQC Misha Salganik ASL MLAC TS BHZ BHN BHE 1993,154,09:38:00 1993,154,09:38:00 Problem Description HIGH FREQUENCY NOISE Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1993:080 1993/11/19 ASL Tyler Storm Description of Problem Resolution COMMENT The high winds at MLAC will increase the noise level throughout the spectrum. The noise in example in HRV93:080_ps, however, was not caused by wind. This appears to an event that occurred very close to the station. END **************************************************************************** DATA PROBLEM REPORT ASL2005:128 2005/08/31 ASL DCC Valerie Peyton ASL SDV IU */* 2005,243,00:32:00 2005,245,08:19:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 454 Timing MAY be in error, as GPS system is not operating consistently. The GPS system at SDV was not able to obtain a solid lock on the GPS satellites during this time. This caused the GPS system to not operate consistently, and produced timing jumps. Data should be used with caution. END PROBLEM RESOLUTION REPORT ASL2005:128 2005/09/07 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The SDV GPS timing system recovered at 2005, 245, 08:19. Timing quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT HRV1993:081 1993/11/17 Harvard WQC Misha Salganik ASL NEE TS BHN BHE LHN LHE 1993,169,17:57:00 1993,169,17:57:00 Problem Description LOW FREQUENCY NOISE Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1993:081 1993/11/18 ASL Tyler Storm Description of Problem Resolution RESOLUTION Refer to Problem Resolution Report HRV1993:071. I was told there is a possibility that the station will be moved to a location where a cycling cooler is not necessary. END **************************************************************************** DATA PROBLEM REPORT ASL2005:129 2005/09/12 ASL DCC Valerie Peyton ASL MBWA IU */* 2005,255,00:57:00 2005,260,03:04:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. An ASL field team is on location at MBWA performing station maintenance. Expect variable data quality and availability, as well as tests, calibrations, and other disturbances. END PROBLEM RESOLUTION REPORT ASL2005:129 2005/09/19 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The ASL field team left MBWA in excellent operational condition at 2005, 260, 03:04. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT DMCQC2011:0065 2011/12/02 IRIS DMC Peggy Johnson DMC J17A TA ?HZ 2007,320,06:51:00 2008,251,13:00:00 Problem Description OTHER Z recorded low amplitudes. END PROBLEM RESOLUTION REPORT DMCQC2011:0065 2011/12/02 IRIS DMC Peggy Johnson Description of Problem Resolution RESOLUTION Sensor replacement resulted in expected amplitudes. END **************************************************************************** DATA PROBLEM REPORT DMCQC2011:0062 2011/12/02 IRIS DMC Peggy Johnson DMC E05A TA ?HN 2005,302,00:00:00 2006,231,00:00:00 Problem Description DATA DROPOUTS N recorded low amplitudes since installation. END PROBLEM RESOLUTION REPORT DMCQC2011:0062 2011/12/02 IRIS DMC Peggy Johnson Description of Problem Resolution RESOLUTION Sensor replacement on 2006.08.18 resulted in expected amplitudes. END **************************************************************************** DATA PROBLEM REPORT HRV1993:082 1993/11/21 Harvard WQC Misha Salganik ASL KIP IU *H* 1993,180,12:00:00 1993,183,02:00:00 Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. Low Frequency Noise END PROBLEM RESOLUTION REPORT HRV1993:082 1994/01/04 ASL Tyler Storm Description of Problem Resolution RESOLUTION A Geoscope maintenance team was troublshooting a problem from day 180, 12:00 until day 183, 02:00. For portions of this time frame, the digitizer, and/or seismometers did not have power. The data in HRV1993:082_ps has a digitizer problem on the vertical and north/south channels. The east/west seismometer was dead at that time. END **************************************************************************** DATA PROBLEM REPORT ASL2005:126 2005/08/31 ASL DCC Valerie Peyton ASL RAR IU 00/*H* 2005,243,06:47:00 2005,243,06:47:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The 54000 at RAR is dead. Data are not useable. END **************************************************************************** DATA PROBLEM REPORT DMCQC2011:0063 2011/12/02 IRIS DMC Peggy Johnson DMC F16A TA ?HE 2008,365,00:00:00 2009,025,00:00:00 Problem Description OTHER E recorded low amplitudes. END PROBLEM RESOLUTION REPORT DMCQC2011:0063 2011/12/02 IRIS DMC Peggy Johnson Description of Problem Resolution RESOLUTION Sensor replacement 2009.025 resulted in expected amplitudes. END **************************************************************************** DATA PROBLEM REPORT ASL2010:020 2010/01/25 ASL DCC Cory Gilbert ASL RCBR IU ALL CHANNELS 2009,210,00:00:00 2006,181,00:00:00 Problem Description OTHER This station has been upgraded to a Q330 digitizer. New metadata are available. An Episensor was installed in place of the FBA. END **************************************************************************** DATA PROBLEM REPORT HRV1993:083 1993/11/21 Harvard WQC Misha Salganik ASL NRIL II BHZ 1993,181,23:47:00 1993,181,23:47:00 Problem Description DATA GLITCHES Data Glitches END PROBLEM RESOLUTION REPORT HRV1993:083 1993/11/23 IDA Peter Davis Description of Problem Resolution RESOLUTION This is the same problem and resolution described in HRV1993:033; field data are actually continuous but a bug in the compression portion of the SEED generation code at the DCC occasionally compresses the last sample of a continuous data stream incorrectly. Previously this error was observed only at a station volume (weekly tape) join, but here it occurs at a day join where the station volume was segmented prior to generation of a SEED volume. The spike therefore appears at what is the last sample of a continuous data stream. See Resolution Report for HRV1993:033. # Tim - It looks like this problem might occur more frequently than was # once thought, and it could be a big time pain for someone. What was # eventually decided about what users should do to get corrected data? END **************************************************************************** DATA PROBLEM REPORT ASL2005:127 2005/08/31 ASL DCC Valerie Peyton ASL GUMO IU */* 2005,242,22:02:00 2005,250,23:28:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. An ASL field team is on location at GUMO performing station maintenance. Expect variable data quality and availability, as well as tests, calibrations, and other disturbances. END PROBLEM RESOLUTION REPORT ASL2005:127 2005/09/08 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The ASL field team left GUMO in excellent operational condition. Data quality returns to normal at 2005, 250, 23:28. END **************************************************************************** DATA PROBLEM REPORT DMCQC2011:0057 2011/10/27 IRIS DMC Gillian Sharer DMC GLA CI VMZ, ?HZ 2010,333,00:00:00 2011,020,18:46:00 Problem Description INVALID RESPONSE CI.GLA.VMZ began drifting on 2010 day 266 21:29 UTC. By 2010 day 333, it had reached values of -8V. On 2011 day 004 11:02 UTC, VMZ came up against the stops and the ?HZ channel became non-seismic. END PROBLEM RESOLUTION REPORT DMCQC2011:0057 2011/10/27 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION CI.GLA.VMZ was re-centered on 2011 day 020 18:46 UTC during a service visit. END **************************************************************************** DATA PROBLEM REPORT ASL2010:018 2010/01/25 ASL DCC Cory Gilbert ASL PAB IU ALL CHANNELS 2009,226,00:00:00 2006,181,00:00:00 Problem Description OTHER This station has been upgraded to a Q330 digitizer. New metadata are available. An Episensor was installed in place of the FBA. An STS-2-HG was installed in addition to the STS-1 already in place. END **************************************************************************** DATA PROBLEM REPORT HRV1993:062 1993/10/16 Harvard WQC Misha Salganik ASL CCM IU LHZ LHN LHE 1993,126,13:03:00 1993,126,13:03:00 Problem Description DATA DROPOUTS Postscript file was placed into /pub/qc/qc_ps. END PROBLEM RESOLUTION REPORT HRV1993:062 1993/11/18 ASL Tyler Storm Description of Problem Resolution COMMENT I looked at CCM long-period data (day 126, 12 UTC - 14 UTC) and I did not see yny dropouts. However, I did notice some pluses in the data. We do not have an explanation for this anomaly at this time. SUPPLEMENT Less than 20 minutes of LH* data are missing on 1993,126 between 13:43 and 13:59. #Did you zero out these pulses, and then send the postscript file, or was the picture you sent to me (HRV93:062_ps) actually what you saw? END **************************************************************************** DATA PROBLEM REPORT DMCQC2011:0058 2011/10/27 IRIS DMC Gillian Sharer DMC Z35A TA ?HN 2010,321,00:13:00 2010,321,23:19:00 Problem Description DEAD CHANNEL From 2010 day 321 00:13-23:19 UTC, the N channel of TA.Z35A was non-seismic. END PROBLEM RESOLUTION REPORT DMCQC2011:0058 2011/10/27 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION Normal operation was restored following a mass lock/unlock. END **************************************************************************** DATA PROBLEM REPORT ASL2010:019 2010/01/25 ASL DCC Cory Gilbert ASL PTGA IU ALL CHANNELS 2009,310,12:00:00 2006,181,00:00:00 Problem Description OTHER This station has been upgraded to a Q330 digitizer. New metadata are available. An Episensor was installed in place of the FBA. An STS-2-HG was installed in place of the CMG. END **************************************************************************** DATA PROBLEM REPORT HRV1993:063 1993/10/16 Harvard WQC Misha Salganik ASL CMB BK LHN LHE BHN BHE 1993,150,17:08:00 1993,150,17:08:00 Problem Description LOW FREQUENCY NOISE Postscript file was placed into /pub/qc/qc_ps. END PROBLEM RESOLUTION REPORT HRV1993:063 1994/04/10 ASL Tyler Storm Description of Problem Resolution Comment This is the normal background noise level for CMB at that time of the day. END **************************************************************************** DATA PROBLEM REPORT DMCQC2011:0055 2011/10/27 IRIS DMC Gillian Sharer DMC SNCC CI VME, ?HE 2010,192,00:00:00 2011,025,18:46:00 Problem Description INVALID RESPONSE CI.SNCC.VME began developing mass position problems on 2010 day 192. By 2010 day 258, VME was near or against the stops and the ?HE seismic channels were non-seismic. END PROBLEM RESOLUTION REPORT DMCQC2011:0055 2011/10/27 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION CI.SNCC.VME was re-centered on 2011 day 025 18:46 during a service visit. The station resumed normal operation. END **************************************************************************** DATA PROBLEM REPORT HRV1993:064 1993/10/16 Harvard WQC Misha Salganik ASL COL IU LHE 1993,150,17:08:00 1993,150,17:08:00 Problem Description LOW FREQUENCY NOISE Postscript file was placed into /pub/qc/qc_ps. END PROBLEM RESOLUTION REPORT HRV1993:064 1993/11/02 ASL Tyler Storm Description of Problem Resolution Comment The east channel at COL is noisy, it probably always will be. I asked the station operator to verify that the bell-jar containing the Streckeisen had not lost vacuum; it had not. END **************************************************************************** DATA PROBLEM REPORT DMCQC2011:0056 2011/10/28 IRIS DMC Peggy Johnson DMC H32A TA * 2011,234,00:00:00 2011,287,00:00:00 Problem Description DATA DROPOUTS During this time period, drifting masses affected the seismic data and triggered multiple mass recenters. Masses became unresponsive to mass recenter commands. END PROBLEM RESOLUTION REPORT DMCQC2011:0056 2011/10/28 IRIS DMC Peggy Johnson Description of Problem Resolution RESOLUTION The Guralp sensor was replaced with a STS-2 d 285 16:47. The instrument finally settled by about d 287 0000. END **************************************************************************** DATA PROBLEM REPORT HRV1993:065 1993/10/16 Harvard WQC Misha Salganik ASL ERM II BHE 1993,145,23:16:00 1993,145,23:16:00 Problem Description DATA GLITCHES Postscript file was placed into /pub/qc/qc_ps. END PROBLEM RESOLUTION REPORT HRV1993:065 1993/10/19 IDA Holly Given Description of Problem Resolution Resolution This is the same problem and resolution described in HRV1993:033; field data are actually continuous but a bug in compressor code occasionally compresses the last sample of a continuous data stream incorrectly. As with HRV1993:033, the error occurs at a station volume (weekly tape) join. See Resolution Report for HRV1993:033. END **************************************************************************** DATA PROBLEM REPORT ASL2010:014 2010/01/25 ASL DCC Cory Gilbert ASL LSZ IU ALL CHANNELS 2008,252,00:00:00 2006,181,00:00:00 Problem Description OTHER This station has been upgraded to a Q330 digitizer. New metadata are available. An Episensor was installed in place of the FBA. END **************************************************************************** DATA PROBLEM REPORT HRV1993:066 1993/10/16 Harvard WQC Misha Salganik ASL GSC TS LHN LHE BHN BHE 1993,150,17:08:00 1993,150,17:08:00 Problem Description LOW FREQUENCY NOISE Postscript file was placed into /pub/qc/qc_ps. END PROBLEM RESOLUTION REPORT HRV1993:066 1993/11/15 ASL Tyler Storm Description of Problem Resolution Comment For whatever reason, the low frequency noise appears to be the normal background at GSC. The station operator could not attribute the high noise levels to anything in particular, and I have not noticed a significant change in the data since the station has been operational. END **************************************************************************** DATA PROBLEM REPORT ASL2010:015 2010/01/25 ASL DCC Cory Gilbert ASL LVC IU ALL CHANNELS 2009,100,00:00:00 2006,181,00:00:00 Problem Description OTHER This station has been upgraded to a Q330 digitizer. New metadata are available. An Episensor was installed in place of the FBA. END **************************************************************************** DATA PROBLEM REPORT HRV1993:067 1993/10/16 Harvard WQC Misha Salganik ASL ISA TS LHN BHN 1993,145,23:16:00 1993,145,23:16:00 Problem Description LOW FREQUENCY NOISE Postscript file was placed into /pub/qc/qc_ps. END PROBLEM RESOLUTION REPORT HRV1993:067 1993/11/15 ASL Tyler Storm Description of Problem Resolution Comment The station operator will check the vacuum on the bell-jar containing the N/S Streckeisen the next time he visits the station. If he finds anything significant I will file a supplemental report. If the equipment appears to functioning normally, we will assume that the N/S data has a higher noise level that the E/W data. END **************************************************************************** DATA PROBLEM REPORT DMCQC2011:0059 2011/10/27 IRIS DMC Gillian Sharer DMC 539A TA * 2010,331,20:55:00 2010,332,21:43:00 Problem Description DEAD CHANNEL TA.539A was non-seismic from 2010 day 331 20:55 UTC - day 332 21:43 UTC. END PROBLEM RESOLUTION REPORT DMCQC2011:0059 2011/10/27 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The station has had problems with flooding. This data loss was the result of a service visit to raise the sensor onto a 2 inch pier. END **************************************************************************** DATA PROBLEM REPORT ASL2010:016 2010/01/25 ASL DCC Cory Gilbert ASL MAJO IU ALL CHANNELS 2009,311,12:00:00 2006,181,00:00:00 Problem Description OTHER This station has been upgraded to a Q330 digitizer. New metadata are available. An Episensor was installed in place of the FBA. END **************************************************************************** DATA PROBLEM REPORT HRV1993:068 1993/10/16 Harvard WQC Misha Salganik ASL LBTB GT LHE LHN LHZ 1993,126,13:03:00 1993,126,13:03:00 Problem Description HIGH FREQUENCY NOISE Postscript file was placed into /pub/qc/qc_ps. END PROBLEM RESOLUTION REPORT HRV1993:068 1993/11/02 ASL Tyler Storm Description of Problem Resolution COMMENT LBTB data has a lot of noise at both ends (high and low frequency). In order to find the signal in the example mentioned for this problem report I had to apply a fairly tight bandpass filter. The noise worsened across the spectrum when the seismometer was moved to a shallower borehole (1993,203). Sometime in the future we intend to replace the seismometer at LBTB in order to eliminate large pulses (transients) on the horizontals, but this problem is unrelated to the naturally high noise levels. END **************************************************************************** DATA PROBLEM REPORT ASL2010:017 2010/01/25 ASL DCC Cory Gilbert ASL OTAV IU ALL CHANNELS 2009,091,00:00:00 2006,181,00:00:00 Problem Description OTHER This station has been upgraded to a Q330 digitizer. New metadata are available. An Episensor was installed in place of the FBA. An STS-2-HG was installed in place of the CMG. END **************************************************************************** DATA PROBLEM REPORT HRV1993:069 1993/10/16 Harvard WQC Misha Salganik ASL LON DW LHZ LHN LHE 1993,126,13:03:00 1993,126,13:03:00 Problem Description OTHER Klipping. Postscript file was placed into /pub/qc/qc_ps. END PROBLEM RESOLUTION REPORT HRV1993:069 1993/11/17 ASL Tyler Storm Description of Problem Resolution Resolution The power supply controlling the mid-range portion of the digitizer is faulty at LON. We have not received any data from LON since 93,250. The station personnel told me their technician would contact us (ASL) in the near future for advice on the repair. END **************************************************************************** DATA PROBLEM REPORT ASL2005:135 2005/10/03 ASL DCC Valerie Peyton ASL PAB IU */* 2005,227,01:37:00 2005,227,20:27:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 451 Timing MAY be in error, as clock is unlocked. The PAB GPS system is unlocked from the GPS timing standard during this time. Timing quality cannot be guaranteed and data should be used with caution. END PROBLEM RESOLUTION REPORT ASL2005:135 2005/10/03 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The PAB GPS system locked back onto the GPS timing standard at 2005, 227, 20:27. Timing quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2005:136 2005/10/03 ASL DCC Valerie Peyton ASL PAB IU */* 2005,229,00:45:00 2005,229,17:15:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 451 Timing MAY be in error, as clock is unlocked. The PAB GPS system is unlocked from the GPS timing standard during this time. Timing quality cannot be guaranteed and data should be used with caution. END PROBLEM RESOLUTION REPORT ASL2005:136 2005/10/03 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The PAB GPS system locked back onto the GPS timing standard at 2005, 229, 17:15. Timing quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2005:133 2005/10/03 ASL DCC Valerie Peyton ASL HIA IC */* 2005,226,09:22:00 2005,226,22:03:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 451 Timing MAY be in error, as clock is unlocked. The HIA GPS system is unlocked from the GPS timing standard during this time. Timing quality cannot be guaranteed and data should be used with caution. END PROBLEM RESOLUTION REPORT ASL2005:133 2005/10/03 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The HIA GPS system re-locked onto the GPS timing standard at 2005, 226, 22:03. Timing quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2005:134 2005/10/03 ASL DCC Valerie Peyton ASL PAB IU */* 2005,221,22:48:00 2005,226,08:49:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 451 Timing MAY be in error, as clock is unlocked. The PAB GPS system is unlocked from the GPS timing standard during this time. Timing quality cannot be guaranteed and data should be used with caution. END PROBLEM RESOLUTION REPORT ASL2005:134 2005/10/03 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The PAB GPS system locked back onto the GPS timing standard at 2005, 226, 08:49. Timing quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2005:131 2005/09/19 ASL DCC Valerie Peyton ASL KMBO IU 00/*HN 2005,256,10:00:00 2006,209,10:44:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The N compnent of the STS1 at KMBO has fallen against its stop. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2005:131 2006/08/09 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The problems with the N component of the STS1 at KMBO were fixed during a maintenance visit. Data quality returns to normal at 2006, 209, 10:44. END **************************************************************************** DATA PROBLEM REPORT ASL2005:132 2005/09/28 ASL DCC Tyler Storm ASL HNR IU 00/?H1, 00/?H2, 00/*HZ 2005,234,13:00:00 2005,234,13:00:00 Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE C 4504 Channel exibits high levels of low frequency noise. Low-frequency noise is present on all three channels from the KS54000. END **************************************************************************** DATA PROBLEM REPORT ASL2005:130 2005/09/19 ASL DCC Valerie Peyton ASL QSPA IU 20/*H* 2005,259,08:18:00 2005,262,20:22:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. All three compnents of the STS2 at QSPA have fallen against their stops. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2005:130 2005/09/19 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION We were able to remotely center the QSPA STS2. Data quality returns to normal at 2005, 262, 20:22. END **************************************************************************** DATA PROBLEM REPORT ASL2010:010 2010/01/25 ASL DCC Cory Gilbert ASL HRV IU ALL CHANNELS 2008,266,00:00:00 2006,181,00:00:00 Problem Description OTHER This station has been upgraded to a Q330 digitizer. New metadata are available. An STS-2-HG and an Episensor were intalled in addition to the STS-1. END **************************************************************************** DATA PROBLEM REPORT DMCQC2011:0050 2011/10/03 IRIS DMC Gillian Sharer DMC S43A TA ?HZ 2011,141,00:00:00 2011,141,00:00:00 Problem Description INVALID RESPONSE Since installation on 2011 day 141, TA.S43A.?HZ has had lower than expected amplitude values, by approximately 50%. END PROBLEM RESOLUTION REPORT DMCQC2011:0050 2012/12/14 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The sensor was replaced on 2011.345, resulting in normal amplitudes on ?HZ. END **************************************************************************** DATA PROBLEM REPORT ASL2010:011 2010/01/25 ASL DCC Cory Gilbert ASL INCN IU ALL CHANNELS 2009,320,03:00:00 2006,181,00:00:00 Problem Description OTHER This station has been upgraded to a Q330 digitizer. New metadata are available. The STS-2-HG was replaced with a new STS-2-HG, as well as an Episensor was installed in place of the FBA. END **************************************************************************** DATA PROBLEM REPORT ASL2010:012 2010/01/25 ASL DCC Cory Gilbert ASL KEV IU ALL CHANNELS 2008,255,00:00:00 2006,181,00:00:00 Problem Description OTHER This station has been upgraded to a Q330 digitizer. New metadata are available. An Episensor was installed in place of the FBA. END **************************************************************************** DATA PROBLEM REPORT ASL2010:013 2010/01/25 ASL DCC Cory Gilbert ASL KONO IU ALL CHANNELS 2009,255,15:02:42 2006,181,00:00:00 Problem Description OTHER This station has been upgraded to a Q330 digitizer. New metadata are available. An Episensor was installed in place of the FBA. END **************************************************************************** DATA PROBLEM REPORT DMCQC2011:0053 2011/10/27 IRIS DMC Gillian Sharer DMC PASC CI 00/?H? 2011,242,14:55:00 2011,280,21:00:00 Problem Description DEAD CHANNEL The CI.PASC.00 STS-1 was removed from the vault on 2011 day 245 14:55 UTC. The station returned digitizer noise during this time period. END PROBLEM RESOLUTION REPORT DMCQC2011:0053 2011/10/27 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The STS-1 was reinstalled on day 280 21:00 UTC. END **************************************************************************** DATA PROBLEM REPORT ASL2005:139 2005/10/04 ASL DCC Valerie Peyton ASL COLA IU */* 2005,269,18:55:00 2005,277,14:52:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. An ASL field engineer is on location at COLA performing station maintenance. Expect variable data quality and availability, as well as tests, calibrations, and other disturbances. END PROBLEM RESOLUTION REPORT ASL2005:139 2005/10/17 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The ASL field engineer left COLA in excellent operational condition, and the last calibration ended at 2005, 277, 14:52. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT DMCQC2011:0054 2011/10/27 IRIS DMC Gillian Sharer DMC ISA CI VMZ 2010,354,20:27:00 2011,034,08:20:00 Problem Description INVALID RESPONSE During this time period, CI.ISA.VMZ was stuck between -8.0V and -8.8V. The ?HZ channel is suspect. END PROBLEM RESOLUTION REPORT DMCQC2011:0054 2011/10/27 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION VMZ was re-centered on 2011 day 034 08:20 UTC after a service visit. END **************************************************************************** DATA PROBLEM REPORT HRV1993:070 1993/10/16 Harvard WQC Misha Salganik ASL MLAC TS LHN LHE BHN BHE 1993,150,17:08:00 1993,150,17:08:00 Problem Description LOW FREQUENCY NOISE Postscript file was placed into /pub/qc/qc_ps. END PROBLEM RESOLUTION REPORT HRV1993:070 1993/11/15 ASL Tyler Storm Description of Problem Resolution RESOLUTION The low frequency noise on the horizontal data is most likely being caused by high winds at the site. These noise levels are characteristic for this site. END **************************************************************************** DATA PROBLEM REPORT DMCQC2011:0051 2011/10/03 IRIS DMC Gillian Sharer DMC T41A TA ?H[EN] 2011,131,08:12:00 2011,236,21:00:00 Problem Description INVALID RESPONSE On 2011 day 131 08:12 UTC, the E channel of TA.T41A experienced a sudden decrease in amplitude values. On 2011 day 137 00:10, the N channel also had a drop in amplitudes. Both occurrences were accompanied by a change in dc offset of ~2000-3000 counts. END PROBLEM RESOLUTION REPORT DMCQC2011:0051 2011/10/03 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The amplitudes returned to normal levels on 2011 day 236 21:00 UTC after a service visit to replace the sensor cable. Following the cable swap however, the Z channel amplitudes became suspect. END **************************************************************************** DATA PROBLEM REPORT HRV1993:071 1993/10/16 Harvard WQC Misha Salganik ASL NEE TS *H* 1993,106,17:00:00 1997,050,02:37:00 Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE C 4506 Channel has high levels of cultural noise for all frequencies. Postscript file was placed into /pub/qc/qc_ps. END PROBLEM RESOLUTION REPORT HRV1993:071 1993/11/15 ASL Tyler Storm Description of Problem Resolution RESOLUTION The low frequency noise depicted in HRV93:071 is being caused by a cycling cooler. This noise was present throughout the life of the station. END **************************************************************************** DATA PROBLEM REPORT ASL2005:137 2005/10/03 ASL DCC Valerie Peyton ASL PAB IU */* 2005,233,16:19:00 2005,235,08:57:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 451 Timing MAY be in error, as clock is unlocked. The PAB GPS system is unlocked from the GPS timing standard during this time. Timing quality cannot be guaranteed and data should be used with caution. END PROBLEM RESOLUTION REPORT ASL2005:137 2005/10/03 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The PAB GPS system locked back onto the GPS timing standard at 2005, 235, 08:57. Timing quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT DMCQC2011:0052 2011/10/27 IRIS DMC Gillian Sharer DMC T41A TA ?HZ 2011,236,21:00:00 2011,295,00:00:00 Problem Description INVALID RESPONSE Following a sensor cable swap on day 2011 236 21:00 UTC, TA.T41A.?HZ experienced a decrease in amplitude values accompanied by a change in dc offset of ~3000 counts. After a calibration on 2011 day 245 00:00 UTC, the channel recovered temporarily. Low amplitude values recurred on day 247 03:25 UTC. END PROBLEM RESOLUTION REPORT DMCQC2011:0052 2011/10/27 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The sensor was replaced and normal operation resumed on day 295 00:00. END **************************************************************************** DATA PROBLEM REPORT HRV1993:072 1993/10/16 Harvard WQC Misha Salganik ASL PMSA IU LHE 1993,150,17:08:00 1993,150,17:08:00 Problem Description DATA GLITCHES Postscript file was placed into /pub/qc/qc_ps. END PROBLEM RESOLUTION REPORT HRV1993:072 1993/11/04 ASL Tyler Storm Description of Problem Resolution Comment We have not been able to find the source of the data glitches (we have been labeling this problem "pulses"). We asked the operator to investigate whether large temperature fluctuations, or the bell-jars leaking could be associated with this anomaly, but so far he has not come up with anything. END **************************************************************************** DATA PROBLEM REPORT ASL2005:138 2005/10/03 ASL DCC Valerie Peyton ASL BILL IU 00/*HE 2005,273,20:20:00 2005,277,18:44:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The E component of the STS1 at BILL has fallen against one of its stops. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2005:138 2005/10/05 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The BILL station operator recentered the STS1 E component. Data quality returns to normal at 2005, 277, 18:44. END **************************************************************************** DATA PROBLEM REPORT DMCQC2011:0046 2011/10/03 IRIS DMC Gillian Sharer DMC V44A TA ?HN 2011,143,06:31:00 2011,186,23:50:00 Problem Description INVALID RESPONSE On 2011 day 143 06:31 UTC, TA.V44A.?HN experienced a decrease in amplitudes accompanied by a sudden change in dc offset of ~3000 counts. During this time period the channel is at approximately half amplitude. END PROBLEM RESOLUTION REPORT DMCQC2011:0046 2011/10/03 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION On 2011 day 186 23:50 UTC, the amplitude and dc offset values spontaneously returned to normal levels. END **************************************************************************** DATA PROBLEM REPORT HRV1993:051 1993/09/14 Harvard WQC Misha Salganik ASL USC TS LHE LHN 1993,108,09:16:00 0939,108,16:00:00 Problem Description LOW FREQUENCY NOISE Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1993:051 1993/09/27 ASL Tyler Storm Description of Problem Resolution Comment The USC seismometers are in a basement on the campus. We are assuming that the activity surrounding the site and the lack of an isolated vault are causing the noise. END **************************************************************************** DATA PROBLEM REPORT DMCQC2011:0047 2011/10/03 IRIS DMC Gillian Sharer DMC V44A TA ?HN 2011,213,06:53:00 2011,259,05:40:00 Problem Description INVALID RESPONSE On 2011 day 213 06:53 UTC, TA.V44A.?HN experienced a decrease in amplitudes accompanied by a sudden change in dc offset of ~2500 counts. During this time period the channel was at approximately half amplitude. This is a recurring issue (see previous data problem report). END PROBLEM RESOLUTION REPORT DMCQC2011:0047 2011/10/03 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION By 2011 day 259 05:40 UTC, the amplitude and dc offset values spontaneously returned to normal levels. END **************************************************************************** DATA PROBLEM REPORT HRV1993:052 1993/09/14 Harvard WQC Misha Salganik ASL VTV TS BHE BHN LHN LHE 1993,114,09:54:00 1993,114,09:04:00 Problem Description LOW FREQUENCY NOISE Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1993:052 1993/09/27 ASL Tyler Storm Description of Problem Resolution Comment The seismometers at VTV are under a false floor in a communications room. Unless the instuments are moved, the site will continue to be noisy. END **************************************************************************** DATA PROBLEM REPORT DMCQC2011:0044 2011/09/08 IRIS DMC Gillian Sharer DMC R11A TA * 2011,131,21:36:00 2011,132,15:40:00 Problem Description DEAD CHANNEL From day 2011 131 21:36 - day 132 15:40 UTC, TA.R11A was non-seismic. END PROBLEM RESOLUTION REPORT DMCQC2011:0044 2011/09/08 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The station returned to normal operation after a service visit re-sited the sensor power cable. END **************************************************************************** DATA PROBLEM REPORT HRV1993:053 1993/09/14 Harvard WQC Misha Salganik ASL WMQ CD LHN 1993,114,09:54:00 1993,114,09:54:00 Problem Description LOW FREQUENCY NOISE Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1993:053 1993/11/15 ASL Tyler Storm Description of Problem Resolution Comment The technician on site has test tapes (WMQ data) that hopefully will help him narrow down where the problem is located. Unfortunately, he is unable to look at the data until the China DMC is reconfigured (a couple weeks). If he is successful in diagnosing the problem, he will then have to travel to the station and make the appropriate changes. I will file a supplemental report when I get updated on the situation. END **************************************************************************** DATA PROBLEM REPORT DMCQC2011:0045 2011/09/13 IRIS DMC Peggy Johnson DMC P41A TA ?HN 2011,160,00:00:00 2011,233,2120:00:00 Problem Description OTHER Since installation 2011.160, the N component has low amplitudes (approximately half). END PROBLEM RESOLUTION REPORT DMCQC2011:0045 2011/09/13 IRIS DMC Peggy Johnson Description of Problem Resolution RESOLUTION The N component resumed normal operation after the Trillium sensor cable was replaced. END **************************************************************************** DATA PROBLEM REPORT HRV1993:054 1993/09/14 Harvard WQC Misha Salganik GOPHER TATO IU LHN LHE LHZ 1993,256,12:37:00 1993,256,12:37:00 Problem Description POLARITY REVERSED Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1993:054 1993/10/20 ASL Tyler Storm Description of Problem Resolution SUPPLEMENT The polarities were reversed on all of the broad-band data at TATO from 10 Sept 93 through 03:00 UTC on 25 Sept 93. END **************************************************************************** DATA PROBLEM REPORT ASL2010:047 2010/03/22 ASL DCC Cory Gilbert ASL CASY IU 20/?NN 1996,169,00:00:00 2010,006,00:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The N/S component of the FBA has been down since the middle of 1996. The other two components are working just fine. END **************************************************************************** DATA PROBLEM REPORT HRV1993:055 1993/09/24 Harvard WQC Misha Salganik GOPHER ANTO IU LHN LHZ LHE 1993,263,10:17:00 1993,263,10:17:00 Problem Description INCORRECT TIME Clock fast by 15 sec. Postscript file is in /pub/qc/qc_ps. END PROBLEM RESOLUTION REPORT HRV1993:055 1993/09/24 ASL Tyler Storm Description of Problem Resolution COMMENT The clock at ANTO is not staying locked to the timing standard. Consequently, the timing is off. In the past we thought the problem was eliminated, but this is not the case. In the future (no exact date set yet) we plan to replace this timing system with a more reliable one. Until this replacement the timing at ANTO will remain unreliable. END **************************************************************************** DATA PROBLEM REPORT ASL2010:048 2010/03/22 ASL DCC Cory Gilbert ASL CHTO IU 20/?N1 2009,270,00:00:00 2010,006,00:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The ?N1 component of the episensor seems to have gone down soon after the field crew left the station after the upgrade last year. Everything checked out well before they left site and there hasn't been any events large enough to push the sensor, so it's tough to tell exactly when it happened. END **************************************************************************** DATA PROBLEM REPORT HRV1993:056 1993/10/01 Harvard WQC Goran Ekstrom DMC LPAZ GT SCI 1993,232,00:00:00 1993,232,00:00:00 Problem Description INVALID RESPONSE This problem report is based on the ASL dataless SEED volume dated 93/09/06: overall gain does not match cumulative gain, at least the way I calculate it: 6: LPAZ SCI 0 -16.2879 -68.1307 4774.0 30.0 0.00 0.00 20.00000 1993 189 0 0 0.0 2000 366 23 59 60.0 437 6:check of gain factor --- cumulative: 0.92986E+15 --- from overall sensitivity 0.79041E+15 # If this is indeed an error, there might be similar problems # for other GTSN stations. END PROBLEM RESOLUTION REPORT HRV1993:056 1993/10/22 ASL Tyler Storm Description of Problem Resolution RESOLUTION The wrong poles and zeros file was stated for SCI. The correct numbers were input approximately 15 Oct 1993. Please make sure to use the latest version of the GT/LPAZ dataless to know that you have the corrected information. END **************************************************************************** DATA PROBLEM REPORT DMCQC2011:0048 2011/10/03 IRIS DMC Gillian Sharer DMC 247A TA ?HE 2011,201,16:50:00 2011,201,16:50:00 Problem Description INVALID RESPONSE On day 2011 201 16:50 UTC, TA.247A.?HE experienced a significant decrease in amplitudes accompanied by a change in dc offset of ~1500-2500 counts. Amplitude values are unreliable. END **************************************************************************** DATA PROBLEM REPORT ASL2010:049 2010/03/22 ASL DCC Cory Gilbert ASL CHTO IU 00/?H? 2009,336,00:00:00 2010,006,00:00:00 Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE C 4503 Channel has intermittant low frequency noise. The horizontal components of the primary instrument go through periods of pulsing that seems to come and go on it's own. It is starting to improve, but is not completely solved at this time. END **************************************************************************** DATA PROBLEM REPORT HRV1993:057 1993/10/01 Harvard WQC Goran Ekstrom DMC LPAZ GT SCI 1993,232,00:00:00 1993,232,00:00:00 Problem Description CHANNEL ORIENTATION This problem report is based on the ASL dataless SEED volume dated 93/09/06: this should be a vertical component but dip,azim looks like a N-S # If this is indeed an error, there might be similar problems # for other GTSN stations. END PROBLEM RESOLUTION REPORT HRV1993:057 1993/10/02 ASL Tyler Storm Description of Problem Resolution COMMENT You have brought up a good point that I had forgot about when I set up the channels. The calibration channels, in this situation, do not have an orientation. For this reason, I left the default "0" value for the azimuth, and dip. I can see how this is confusing, being that 0 azimuth, and 0 dip indicate a north/south channel. We will discuss what options SEED has for describing this particular type of channel. I will file a supplemental to keep you informed. >PROBLEM RESOLUTION REPORT HRV1993:057 >1993/10/08 ASL Tyler Storm >Description of Problem Resolution >Supplemental > >Since the dip and azimuth are "not applicable" (reference appendix A, SEED >Manual version 2.3) they will be set to zero. This is a little confusing in >that some of the dip/azimuth parameters for other channels actually state >"Not applicable - Should be zero". Our policy will be that for any channel >where the dip/azimuth value is not applicable, the value should be zero. END **************************************************************************** DATA PROBLEM REPORT DMCQC2011:0049 2011/11/11 IRIS DMC Gillian Sharer DMC Q42A TA ?HE 2011,127,00:00:00 2011,302,18:00:00 Problem Description INVALID RESPONSE Since installation on 2011 day 127, The E channel of TA.Q42A has had amplitude values that are approximately half of expected levels. END PROBLEM RESOLUTION REPORT DMCQC2011:0049 2011/11/11 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The sensor was replaced on 2011 day 302 18:00, resulting in normal amplitudes on ?HE. END **************************************************************************** DATA PROBLEM REPORT HRV1993:058 1993/10/01 Harvard WQC Goran Ekstrom DMC SPA IU BHN 1993,189,00:00:00 1993,189,00:00:00 Problem Description INVALID RESPONSE This problem report is based on the ASL dataless SEED volume dated 93/09/06: There is something funny about the BHN channel -- the response is different from BHE and BHZ (and I don't think it should be). END PROBLEM RESOLUTION REPORT HRV1993:058 1993/10/02 ASL Tyler Storm Description of Problem Resolution Resolution The BHN channel did not contain the coeficients for the second stage of filters in the system. I corrected the BHN response by adding the coeficients file on 2 Oct 93. Thanks for the info. END **************************************************************************** DATA PROBLEM REPORT HRV1993:059 1993/10/01 Harvard WQC Goran Ekstrom DMC * IU * 1993,189,00:00:00 1993,189,00:00:00 Problem Description OTHER This problem report is based on the ASL dataless SEED volume dated 93/09/06: much of the header information is flagged as updates (U) -- I thought these volumes would only contain the correct information END PROBLEM RESOLUTION REPORT HRV1993:059 1993/10/02 ASL Tyler Storm Description of Problem Resolution Comment After we make a change to the database (no matter how slight) the appropriate update flag is set for 60 days. The information on the volumes is always the most current and correct information that we are aware of at the time of production. END **************************************************************************** DATA PROBLEM REPORT ASL2005:102 2005/06/23 ASL DCC Valerie Peyton ASL RAR IU 10/*H* 2005,173,13:36:00 2006,017,01:44:00 Problem Description SPIKES SEED COMMENT REFERENCE C 4510 Channel has frequent spiking. The CMG3-T at RAR has developed a bad spiking problem. Spike amplitudes are 100,000 to 400,000 counts on the N & E components, and only a few 100 counts on the Z component. Since background noise levels are so high at this island site, the spikes are just barely above the background until one filters the data. The Z & N component spikes have the same polarity, and the E component spikes have opposite polarity. The spikes are quasi-periodic, with the frequency of occurrance varying from 300 seconds to 800 seconds. An attempt to recenter the masses had no effect on the spiking problem. Past spiking episodes on this sensor at RAR have had a different character (N & E spikes have previously had identical polarity; spiking sequences have been shorter; spikes have been longer-period; generally, spikes have had the characteristics of noise generated by activity too close to the vault). This time it appears we may have an instrument problem. END PROBLEM RESOLUTION REPORT ASL2005:102 2006/01/18 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The RAR CMG3-T was replaced. The new instrument appears to be free of the spiking problem which plagued the old instrument. Data quality returns to normal at 2006, 017, 01:44. END **************************************************************************** DATA PROBLEM REPORT ASL2005:103 2005/06/24 ASL DCC Valerie Peyton ASL SDV IU */* 2005,174,22:16:00 2005,177,07:21:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 454 Timing MAY be in error, as GPS system is not operating consistently. The GPS system at SDV was not able to obtain a solid lock on the GPS satellites during this time. This caused the GPS system to not operate consistently, and produced timing jumps. Data should be used with caution. END PROBLEM RESOLUTION REPORT ASL2005:103 2005/06/27 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The SDV GPS system obtained a solid lock on the satellite signal at 2005, 177, 07:21. Timing quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2005:100 2005/06/22 ASL DCC Valerie Peyton ASL ANMO IU 10/*H2 2005,172,17:02:00 2005,173,16:09:00 Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE C 4504 Channel exibits high levels of low frequency noise. The 2 component of the CMG3T-B at ANMO has developed a most strange problem. There is a long-period (~2.9 hour) roller-coaster-like waveform in the data. The amplitude of this long-period disturbance is 1 million to 4 million counts. The mass position is not changing, so it possible this is an electrical problem. Data may not be useable. END PROBLEM RESOLUTION REPORT ASL2005:100 2005/06/22 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION An ASL field engineer determined that the ANMO CMG3T-B 2 component had almost fallen against one of its stops. He recentered the instrument, and data quality returns to normal at 2005, 173, 16:09. END **************************************************************************** DATA PROBLEM REPORT ASL2005:101 2005/06/22 ASL DCC Valerie Peyton ASL KONO AS * 1978,214,11:35:00 1978,224,11:48:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. KONO was being installed and tested during this time. Expect variable data quality and availability, as well as test and calibrations. END PROBLEM RESOLUTION REPORT ASL2005:101 2005/06/22 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Installation of KONO was completed and data quality becomes normal at 1978, 224, 11:48. END **************************************************************************** DATA PROBLEM REPORT ASL2010:043 2010/03/05 ASL DCC Cory Gilbert ASL SDV IU 00/?HZ, 00/?HN, 00/?HE 2004,074,00:00:00 2010,021,00:00:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4625 Invalid instrument response. This instrument has an amplitude dependent lowered response at longer periods. The effect is non-linear and is greater as the ground motion amplitude increases. Most likely this problem was caused by moisture in the feedback electronics box or the seismometer enclosure. The problem has most likely become worse over time. Although we recognize this problem we do not have a good way to describe it in the dataless SEED at this time, but we are working on it. END **************************************************************************** DATA PROBLEM REPORT ASL2010:044 2010/03/05 ASL DCC Cory Gilbert ASL PET IU 00/?HN 2005,151,00:00:00 2010,006,00:00:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4625 Invalid instrument response. This instrument has an amplitude dependent lowered response at longer periods. The effect is non-linear and is greater as the ground motion amplitude increases. Most likely this problem was caused by moisture in the feedback electronics box or the seismometer enclosure. The problem has most likely become worse over time. Although we recognize this problem we do not have a good way to describe it in the dataless SEED at this time, but we are working on it. END **************************************************************************** DATA PROBLEM REPORT ASL2010:045 2010/03/05 ASL DCC Cory Gilbert ASL SSE IC 00/?HZ, 00/?HN, 00/?HE 2001,001,00:00:00 2010,006,00:00:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4625 Invalid instrument response. This instrument has an amplitude dependent lowered response at longer periods. The effect is non-linear and is greater as the ground motion amplitude increases. Most likely this problem was caused by moisture in the feedback electronics box or the seismometer enclosure. The problem has most likely become worse over time. Although we recognize this problem we do not have a good way to describe it in the dataless SEED at this time, but we are working on it. NOTE: This issue is definitely present on the vertical component. It looks like it is present on the horizontals as well, although it's tough to pin down an exact date. END **************************************************************************** DATA PROBLEM REPORT ASL2005:108 2005/07/05 ASL DCC Valerie Peyton ASL KMBO IU 00/*HN 2005,185,19:00:00 2006,209,10:44:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4630 Response may be invalid. The N component of the STS1 at KMBO has developed a problem. It periodically goes into bouts of oscillations. These oscillations have a period of 250 - 300 seconds and an amplitude of a few thousand to a few hundred thousand counts. These oscillations dominate the instrument response from 1.0 Hz all the way down through the lower frequencies. The PSD of these oscillations peaks at 285.7 seconds. END PROBLEM RESOLUTION REPORT ASL2005:108 2006/08/09 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The problems with the N component of the STS1 at KMBO were fixed during a maintenance visit. Data quality returns to normal at 2006, 209, 10:44. END **************************************************************************** DATA PROBLEM REPORT ASL2010:046 2010/03/05 ASL DCC Cory Gilbert ASL SAML IU 00/?H? 2009,318,00:00:00 2010,006,00:00:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4625 Invalid instrument response. The 54000 that is installed at SAML has some gain (and other) issues. The field crew discovered that it had been damaged during transport to the station. While on-site, they used what they could of the sensor that was to be replaced in addition to what was usable from the new instrument to get something that would produce data. A plan is in place to send another instrument when time and funding are available. END **************************************************************************** DATA PROBLEM REPORT ASL2005:109 2005/07/11 ASL DCC Valerie Peyton ASL QSPA IU 20/*H* 2005,191,02:16:00 2005,215,22:21:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. All three compnents of the STS2 at QSPA have fallen against their stops. Very large events are still visible, but data should be used with caution. SUPPLEMENT 2005, 193 The QSPA STS2 has tilted past the point of remotely recentering the masses. Data will not be useable until the weather warms to the point that the station operator can access the site. In addition, the moon must be sufficiently full for the vehicle operator to see the road. Since it is currently mid-winter,it could take several weeks for the weather conditions to allow a site visit. END PROBLEM RESOLUTION REPORT ASL2005:109 2005/08/04 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION Data are back to normal at 2005,215,22:21:00. END **************************************************************************** DATA PROBLEM REPORT DMCQC2011:0042 2011/09/08 IRIS DMC Gillian Sharer DMC 539A TA * 2011,091,06:29:00 2011,186,10:30:00 Problem Description OTHER TA.539A.VM1 stopped responding to mass recenter commands on 2011.091 06:29 UTC. The masses continued drifting and hit the stops from : day 095 23:30 - 097 01:17 UTC day 097 01:30- 06:17 UTC. day 120 06:05 - 126 15:30 UTC. day 164 14:36 - 185 16:45 UTC. (VM1 and VM2) causing the station to become non-seismic. END PROBLEM RESOLUTION REPORT DMCQC2011:0042 2011/09/08 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION A service visit on day 126 rebedded and releveled the sensor, but the masses continued to drift. Service visits on days 183 and 186 mucked water from the vault and rebedded the sensor again. Masses are now responding to mass recenter commands. Water continues to be an issue at the site and the horizontals have excessive tilt noise. END **************************************************************************** DATA PROBLEM REPORT ASL2005:106 2005/06/29 ASL DCC Valerie Peyton ASL ULN IU */* 2005,178,20:30:00 2005,178,20:30:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 452 Timing IS in error, as clock is unlocked. The GPS system at ULN has lost its clock string. This means that there is no way to calculate or control timing drift. This timing problem started after a system reset; when the system came back up, it was unable to make contact with the GPS system. Timing quality should be considered incorrect. END **************************************************************************** DATA PROBLEM REPORT DMCQC2011:0043 2011/09/08 IRIS DMC Gillian Sharer DMC Y22D TA ?HN, VM2 2011,124,18:25:00 2011,124,23:25:00 Problem Description DEAD CHANNEL From day 124 18:25-23:25 UTC, TA.Y22D.VM2 was at the stops resulting in ?HN becoming non-seismic. END PROBLEM RESOLUTION REPORT DMCQC2011:0043 2011/09/08 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The station returned to normal operation after a mass recenter. END **************************************************************************** DATA PROBLEM REPORT ASL2010:040 2010/03/05 ASL DCC Cory Gilbert ASL MA2 IU 00/?HZ 2005,035,00:00:00 2010,054,00:00:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4625 Invalid instrument response. This instrument has an amplitude dependent lowered response at longer periods. The effect is non-linear and is greater as the ground motion amplitude increases. Most likely this problem was caused by moisture in the feedback electronics box or the seismometer enclosure. The problem has most likely become worse over time. Although we recognize this problem we do not have a good way to describe it in the dataless SEED at this time, but we are working on it. END **************************************************************************** DATA PROBLEM REPORT ASL2005:107 2005/07/05 ASL DCC Valerie Peyton ASL BILL IU 00/*HE 2005,185,13:31:00 2005,185,13:31:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The E component of the STS1 at BILL has fallen against one of its stops. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2005:107 2005/07/07 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The BILL station operator recentered the STS1 N component. Data quality returns to normal at 2005, 188, 04:28. END **************************************************************************** DATA PROBLEM REPORT DMCQC2011:0040 2011/09/08 IRIS DMC Gillian Sharer DMC 444A TA ?HN 2011,122,16:09:00 2011,122,21:11:00 Problem Description DEAD CHANNEL From 2011 day 122 16:09 - 21:11 UTC, TA.444A.?HN was effectively non-seismic due to noise on the order of 3000000 counts. END PROBLEM RESOLUTION REPORT DMCQC2011:0040 2011/09/08 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The channel resumed normal operation on day 122 21:11 UTC. END **************************************************************************** DATA PROBLEM REPORT ASL2010:041 2010/03/05 ASL DCC Cory Gilbert ASL MA2 IU 00/?HN 2007,331,00:00:00 2010,054,00:00:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4625 Invalid instrument response. This instrument has an amplitude dependent lowered response at longer periods. The effect is non-linear and is greater as the ground motion amplitude increases. Most likely this problem was caused by moisture in the feedback electronics box or the seismometer enclosure. The problem has most likely become worse over time. Although we recognize this problem we do not have a good way to describe it in the dataless SEED at this time, but we are working on it. END **************************************************************************** DATA PROBLEM REPORT HRV1993:060 1993/10/16 Harvard WQC Misha Salganik ASL ARU II BHN BHE 1993,150,17:08:00 1993,150,17:08:00 1993,150,17:08:00 Problem Description LOW FREQUENCY NOISE Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1993:060 1993/11/23 IDA Peter Davis Description of Problem Resolution Comment Extensive time series plots for this station indicate that the long period horizontal noise apparent in this record is comparable in magnitude to other recording periods. Sensors are located in a surface vault, a type of deployment known to be noisy for horizontal instruments, particularly at low frequencies. END **************************************************************************** DATA PROBLEM REPORT ASL2005:104 2005/06/27 ASL DCC Valerie Peyton ASL QSPA IU 20/*H* 2005,176,08:43:00 2005,181,00:37:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. All three compnents of the STS2 at QSPA have fallen against their stops. Very large events are still visible, but data should be used with caution. END PROBLEM RESOLUTION REPORT ASL2005:104 2005/06/30 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION We were able to remotely recenter the QSPA STS2. Data quality returns to normal at 2005, 181, 00:37. END **************************************************************************** DATA PROBLEM REPORT DMCQC2011:0041 2011/09/08 IRIS DMC Gillian Sharer DMC 236A TA * 2011,122,08:56:00 2011,122,15:24:00 Problem Description DEAD CHANNEL TA.Z36A.VM[23] started drifting rapidly on day 122 08:56 UTC and approached or hit the stops on day 122 11:30. The horizontals became non-seismic. END PROBLEM RESOLUTION REPORT DMCQC2011:0041 2011/09/08 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The station returned to normal operation after a mass recenter on day 122 15:24 UTC. END **************************************************************************** DATA PROBLEM REPORT ASL2010:042 2010/03/05 ASL DCC Cory Gilbert ASL AFI IU 00/?HN 2005,121,00:00:00 2010,054,00:00:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4625 Invalid instrument response. This instrument has an amplitude dependent lowered response at longer periods. The effect is non-linear and is greater as the ground motion amplitude increases. Most likely this problem was caused by moisture in the feedback electronics box or the seismometer enclosure. The problem has most likely become worse over time. Although we recognize this problem we do not have a good way to describe it in the dataless SEED at this time, but we are working on it. END **************************************************************************** DATA PROBLEM REPORT HRV1993:061 1993/10/16 Harvard WQC Misha Salganik ASL BDF DW LHZ LHN LHE 1993,122,11:26:00 1993,122,11:26:00 Problem Description DATA DROPOUTS Postscript file was placed into /pub/qc/qc_ps. END PROBLEM RESOLUTION REPORT HRV1993:061 1993/11/02 ASL Tyler Storm Description of Problem Resolution Comment BDF had been going down hill for a while, and it was not feasible to put the money into repairing the station. The GTSN station BDFB is now providing braodband data from approximately the same location. FYI: BDF is no longer being formally supported by ASL. The most recent data I have received from BDF was day 93,159, and I assume this will be last data we distibute for the station. END **************************************************************************** DATA PROBLEM REPORT ASL2005:105 2005/06/27 ASL DCC Valerie Peyton ASL KMBO IU */* 2005,176,10:16:00 2005,176,13:43:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. The KMBO station operator was in the vault during this time, attempting (unsuccessfully) to repair the STS1 Z component. Data quality on all channels is compromised. END PROBLEM RESOLUTION REPORT ASL2005:105 2005/06/27 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The KMBO station operator's vault visit lasted about 3.5 hours. Data quality (except for the STS1 Z) returns to normal at 2005, 176, 13:43. END **************************************************************************** DATA PROBLEM REPORT DMCQC2011:0035 2011/07/22 IRIS DMC Gillian Sharer DMC 236A TA ?H? 2011,187,19:31:00 2011,188,03:09:00 Problem Description DEAD CHANNEL During this time period, the masses of TA.236A were locked and the seismic channels were non-seismic. END PROBLEM RESOLUTION REPORT DMCQC2011:0035 2011/07/22 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The station was unlocked on 211 day 188 03:09 UTC. ?HN and ?HE became seismic again. ?HZ remained non-seismic. END **************************************************************************** DATA PROBLEM REPORT HRV1993:040 1993/08/23 Harvard WQC Misha Salganik ASL SPA IU LHN LHE 1993,000,60:00:00 1993,000,60:00:00 Problem Description LOW FREQUENCY NOISE This is well known problem that was not mentioned in the bulletin. Postscript file available on dmc.iris.washington.edu cd pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1993:040 1993/09/09 ASL Tyler Storm Description of Problem Resolution Comment The low frequency noise has been present in SPA data since the station was installed. The period of the noise ranges from 17 to 40 minutes. Our colleagues at the South Pole have been running tests to try to determine the source, but have not had much luck so far. We at ASL had presumed that the anomaly was being caused by a cycling heater on a thermostat; however, tests at the Pole have all but ruled out this theory. If we can locate the source I will file a supplemental report. END **************************************************************************** DATA PROBLEM REPORT DMCQC2011:0036 2011/07/22 IRIS DMC Gillian Sharer DMC 236A TA ?HE 2011,195,12:00:00 2011,198,02:13:00 Problem Description DEAD CHANNEL During this time period VM3 was near or against the stops. ?HE was non-seismic. END PROBLEM RESOLUTION REPORT DMCQC2011:0036 2011/07/22 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION TA.236A.?HE became seismic again after a mass recenter. END **************************************************************************** DATA PROBLEM REPORT HRV1993:041 1993/09/14 Harvard WQC Misha Salganik ASL ERM II BHN BHE 1993,114,09:54:00 1993,114,09:54:00 Problem Description LOW FREQUENCY NOISE Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1993:041 1993/09/28 IDA Holly Given Description of Problem Resolution Comment Although long section time series plots show that long period horizontal noise is indeed higher than average for about 3 days around the time in question, levels are not abnormally high for 'noisy' periods at ERM. This is probably related to weather or storms, which are known to affect horizontal sensors at long periods. All instrumentation appears to be operating normally. END **************************************************************************** DATA PROBLEM REPORT DMCQC2011:0033 2011/07/22 IRIS DMC Gillian Sharer DMC 444A TA ?HN 2011,194,11:03:00 2011,213,19:20:00 Problem Description LOW FREQUENCY NOISE Since day 194, TA.444A.?HN has shown increased noise at periods > 15 seconds. END PROBLEM RESOLUTION REPORT DMCQC2011:0033 2011/09/08 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The sensor was replaced on day 213 19:20 UTC. END **************************************************************************** DATA PROBLEM REPORT HRV1993:042 1993/09/14 Harvard WQC Misha Salganik ASL ESK II BHZ BHN BHE 1993,000,92:00:00 1993,106,00:00:00 Problem Description DATA DROPOUTS Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1993:042 1993/09/28 IDA Holly Given Description of Problem Resolution Comment There is no problem. Users are reminded that for older IDA systems, 20 sps data streams (BH*) are event triggered. For applications requiring continuous data, please use MH* (5 sps) data streams. The following dates of when stations had the lower continuous sample rate may be helpful: ESK: 87:317 - 93:218 (currently being upgraded) NNA: 88:174 - 93:173 (currently being upgraded) PFO: 86:297 - 92:025 RPN: 87:166 - 90:150 All other IRIS/IDA stations have always had 20 sps as the basic continuous sample rate. ************************************************************************** DATA PROBLEM REPORT HRV1993:043 1993/09/14 Harvard WQC Misha Salganik ASL LBTB GT BH* LH* VH* 1993,108,08:35:00 1993,108,16:43:00 Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE C 1840 Calibration data Postscript file was placed into /pub/qc/qc_ps END **************************************************************************** DATA PROBLEM REPORT DMCQC2011:0034 2011/07/21 IRIS DMC Gillian Sharer DMC 236A TA ?HZ 2011,184,06:11:00 2011,210,21:25:00 Problem Description DEAD CHANNEL On day 184, TA.236A.?HZ became non-seismic. After an attempted lock and unlock of the masses on day 187, VM1 came up against the stops and stayed there. END PROBLEM RESOLUTION REPORT DMCQC2011:0034 2011/09/01 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The sensor was replaced on 2011 day 210 21:25 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2011:0039 2011/09/08 IRIS DMC Gillian Sharer DMC 147A TA ?HZ 2011,107,00:41:00 2011,112,20:00:00 Problem Description INVALID RESPONSE On 2011 day 107, TA.147A.?HZ experienced a decrease in amplitudes accompanied by a sudden drop in its dc offset of ~3000 counts. END PROBLEM RESOLUTION REPORT DMCQC2011:0039 2011/09/08 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The problem resolved itself spontaneously. The dc offset began to gradually recover on day 110, and by day 112 20:00 UTC both amplitudes and dc offset had returned to normal levels. END **************************************************************************** DATA PROBLEM REPORT ASL2010:036 2010/03/05 ASL DCC Cory Gilbert ASL OTAV IU 00/?HZ, 00/?HN, 00/?HE 2007,165,00:00:00 2010,054,00:00:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4625 Invalid instrument response. This instrument has an amplitude dependent lowered response at longer periods. The effect is non-linear and is greater as the ground motion amplitude increases. Most likely this problem was caused by moisture in the feedback electronics box or the seismometer enclosure. The problem has most likely become worse over time. Although we recognize this problem we do not have a good way to describe it in the dataless SEED at this time, but we are working on it. END **************************************************************************** DATA PROBLEM REPORT HRV1993:044 1993/09/14 Harvard WQC Misha Salganik ASL LSA CD LHN LHE 1993,000,33:08:04 1993,000,33:08:04 Problem Description LOW FREQUENCY NOISE Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1993:044 1993/10/08 ASL Tyler Storm Description of Problem Resolution Comment As with SSE we could not associate any equipment failure with the horizontal noise at LSA. The technician in China did said that the noise is worse in the springtime (particularly April) due to the runoff generated by the thaw. END **************************************************************************** DATA PROBLEM REPORT ASL2010:037 2010/03/05 ASL DCC Cory Gilbert ASL BJT IC 00/?HZ 2003,001,00:00:00 2010,054,00:00:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4625 Invalid instrument response. This instrument has an amplitude dependent lowered response at longer periods. The effect is non-linear and is greater as the ground motion amplitude increases. Most likely this problem was caused by moisture in the feedback electronics box or the seismometer enclosure. The problem has most likely become worse over time. Although we recognize this problem we do not have a good way to describe it in the dataless SEED at this time, but we are working on it. END **************************************************************************** DATA PROBLEM REPORT HRV1993:045 1993/09/14 Harvard WQC Misha Salganik ASL MDJ CD LHE LHN LHZ 1993,095,04:00:00 1993,095,04:00:00 Problem Description LOW FREQUENCY NOISE Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1993:045 1993/10/07 ASL Tyler Storm Description of Problem Resolution RESOLUTION The noise on this plot (at 52 minutes) is the broadband calibration. END **************************************************************************** DATA PROBLEM REPORT DMCQC2011:0037 2011/07/22 IRIS DMC Gillian Sharer DMC 539A TA * 2011,163,13:45:00 2011,185,10:40:00 Problem Description DEAD CHANNEL During this time period, TA.539A had problems with flooding. On 2011 day 163, VM1 approached the stops. On day 165 ~15:00 the station became non-seismic. END PROBLEM RESOLUTION REPORT DMCQC2011:0037 2011/07/22 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION On 2011 day 185, the site was serviced and the sensor rebedded in dry sand. TA.539A became seismic again at 10:40 UTC. However, the vault continues to have problems with water. END **************************************************************************** DATA PROBLEM REPORT ASL2010:038 2010/03/05 ASL DCC Cory Gilbert ASL BJT IC 00/?HN 2005,001,00:00:00 2010,054,00:00:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4625 Invalid instrument response. This instrument has an amplitude dependent lowered response at longer periods. The effect is non-linear and is greater as the ground motion amplitude increases. Most likely this problem was caused by moisture in the feedback electronics box or the seismometer enclosure. The problem has most likely become worse over time. Although we recognize this problem we do not have a good way to describe it in the dataless SEED at this time, but we are working on it. END **************************************************************************** DATA PROBLEM REPORT HRV1993:046 1993/09/14 Harvard WQC Misha Salganik ASL NEE TS * 1993,106,17:00:00 1993,124,18:54:00 Problem Description DATA LOGGER PROBLEM SEED COMMENT REFERENCE C 4010 Channel is down. Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1993:046 1993/09/18 ASL Tyler Storm Description of Problem Resolution COMMENT This time frame is the first data received from NEE. It looks like the station personnel were still in the installation process because the Streckeisen seismometers do not appear to be hooked up. I did not notice the problems on the next tape beginning day 1993,124. END **************************************************************************** DATA PROBLEM REPORT DMCQC2011:0038 2011/07/22 IRIS DMC Gillian Sharer DMC 343A TA ?HN 2011,153,22:55:00 2011,181,00:41:00 Problem Description DEAD CHANNEL On day 2011 153 22:55, TA.343A.?HN experienced an increase in noise. Shortly thereafter, the channel became non-seismic. END PROBLEM RESOLUTION REPORT DMCQC2011:0038 2011/07/22 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The station resumed normal operation on 2011,181,00:41 UTC after the sensor was replaced. END **************************************************************************** DATA PROBLEM REPORT ASL2010:039 2010/03/05 ASL DCC Cory Gilbert ASL MA2 IU 00/?HE 2006,120,00:00:00 2010,054,00:00:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4625 Invalid instrument response. This instrument has an amplitude dependent lowered response at longer periods. The effect is non-linear and is greater as the ground motion amplitude increases. Most likely this problem was caused by moisture in the feedback electronics box or the seismometer enclosure. The problem has most likely become worse over time. Although we recognize this problem we do not have a good way to describe it in the dataless SEED at this time, but we are working on it. END **************************************************************************** DATA PROBLEM REPORT HRV1993:047 1993/09/14 Harvard WQC Misha Salganik ASL NNA II BHZ BHN BHE 1993,095,04:00:00 1993,095,04:00:00 Problem Description DATA DROPOUTS Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1993:047 1993/09/28 IDA Holly Given Description of Problem Resolution COMMENT There is no problem. Users are reminded that for older IDA systems, 20 sps data streams (BH*) are event triggered. For applications requiring continuous data, please use MH* (5 sps) data streams. The following dates of when stations had the lower continuous sample rate may be helpful: ESK: 87:317 - 93:218 (currently being upgraded) NNA: 88:174 - 93:173 (currently being upgraded) PFO: 86:297 - 92:025 RPN: 87:166 - 90:150 All other IRIS/IDA stations have always had 20 sps as the basic continuous sample rate. # NOTE: There is continuous 5 Hz data for the event on 93:095. END **************************************************************************** DATA PROBLEM REPORT HRV1993:048 1993/09/14 Harvard WQC Misha Salganik ASL PMSA IU LHN LHE LHZ 1993,000,95:16:51 1993,000,95:16:51 Problem Description LOW FREQUENCY NOISE Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1993:048 1993/09/25 ASL Tyler Storm Description of Problem Resolution Comment Due to high winds, and being so close to the water PMSA will probably always be a noisy station. END **************************************************************************** DATA PROBLEM REPORT HRV1993:049 1992/09/14 Harvard WQC Misha salganik ASL PFO TS BHZ LHZ 1993,092,08:04:00 1993,092,08:04:00 Problem Description LOW FREQUENCY NOISE Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1993:049 1993/11/10 ASL Tyler Storm Description of Problem Resolution RESOLUTION The vertical STS-1 lost vacuum from 1993,091 through 1993,142; refer to data problem report IDA1993:005 for details. END **************************************************************************** DATA PROBLEM REPORT ASL2005:113 2005/07/26 ASL DCC Valerie Peyton ASL INCN IU 00/*HZ 2005,207,06:06:00 2005,217,06:10:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The Z component of the STS1 at INCN has fallen against its stop. Very large events are still visible, but data should be used with caution. SUPPLEMENT 2005, 215 As of 2005, 214, 13:37, events are no longer visible and data are unuseable. END PROBLEM RESOLUTION REPORT ASL2005:113 2005/08/05 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The INCN station operator re-established vacuum in the STS1 Z bell jar. This pulled the mass back to center. Data quality returns to normal at 2005, 217, 06:10. END **************************************************************************** DATA PROBLEM REPORT ASL2005:114 2005/07/27 ASL DCC Valerie Peyton ASL SDV IU */* 2005,204,19:11:00 2005,205,08:06:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 454 Timing MAY be in error, as GPS system is not operating consistently. The GPS system at SDV was not able to obtain a solid lock on the GPS satellites during this time. This caused the GPS system to not operate consistently. Data should be used with caution. END PROBLEM RESOLUTION REPORT ASL2005:114 2005/07/27 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The SDV GPS system obtained a solid lock on the satellite signal at 2005, 205, 08:06. Timing quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2005:111 2005/07/11 ASL DCC Valerie Peyton ASL SDV IU *HE 1996,241,11:09:00 1997,345,00:29:00 Problem Description SPIKES SEED COMMENT REFERENCE C 4520 Channel has occasional spiking. There are large spikes in the E/W broad-band data. END PROBLEM RESOLUTION REPORT ASL2005:111 2005/07/11 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The spiking problem on the SDV E/W data disappeared of its own accord at 1997, 345, 00:29. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2005:112 2005/07/14 ASL DCC Valerie Peyton ASL KONO AS LHZ 1990,308,12:08:00 1991,103,11:41:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4630 Response may be invalid. The Z component (S11 seismometer) intermittantly loses its proper response. Data should be used with caution. END PROBLEM RESOLUTION REPORT ASL2005:112 2005/07/14 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The Z component (S11 seismometer) response problem disappeared at 1991, 103, 11:41. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2005:110 2005/07/11 ASL DCC Valerie Peyton ASL MAJO IU */* 2005,186,00:34:00 2005,186,00:34:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 454 Timing MAY be in error, as GPS system is not operating consistently. The GPS system at MAJO is not working properly. The clock is sometimes able to lock on, and sometimes not. Timing quality should be considered suspect. END **************************************************************************** DATA PROBLEM REPORT ASL2010:032 2010/03/05 ASL DCC Cory Gilbert ASL KIP IU 00/?HN, 00/?HE 2007,090,00:00:00 2010,055,00:00:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4625 Invalid instrument response. This instrument has an amplitude dependent lowered response at longer periods. The effect is non-linear and is greater as the ground motion amplitude increases. Most likely this problem was caused by moisture in the feedback electronics box or the seismometer enclosure. The problem has most likely become worse over time. Although we recognize this problem we do not have a good way to describe it in the dataless SEED at this time, but we are working on it. END **************************************************************************** DATA PROBLEM REPORT ASL2010:033 2010/03/05 ASL DCC Cory Gilbert ASL INCN IU 00/?HN 2002,080,00:00:00 2004,106,00:00:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4625 Invalid instrument response. This instrument has an amplitude dependent lowered response at longer periods. The effect is non-linear and is greater as the ground motion amplitude increases. Most likely this problem was caused by moisture in the feedback electronics box or the seismometer enclosure. The problem has most likely become worse over time. Although we recognize this problem we do not have a good way to describe it in the dataless SEED at this time, but we are working on it. END **************************************************************************** DATA PROBLEM REPORT ASL2010:034 2010/03/05 ASL DCC Cory Gilbert ASL HIA IC 00/?HZ 2006,001,00:00:00 2010,054,00:00:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4625 Invalid instrument response. This instrument has an amplitude dependent lowered response at longer periods. The effect is non-linear and is greater as the ground motion amplitude increases. Most likely this problem was caused by moisture in the feedback electronics box or the seismometer enclosure. The problem has most likely become worse over time. Although we recognize this problem we do not have a good way to describe it in the dataless SEED at this time, but we are working on it. END **************************************************************************** DATA PROBLEM REPORT ASL2005:119 2005/08/09 ASL DCC Valerie Peyton ASL TIXI IU 00/*HE 2005,219,21:30:00 2005,220,13:32:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The E component of the STS1 at TIXI has lost mass capture. Only very large events are visible. Data should be used with caution. END PROBLEM RESOLUTION REPORT ASL2005:119 2005/08/09 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The TIXI station operator recentered the STS1 E component. Data quality returns to normal at 2005, 220, 13:32. END **************************************************************************** DATA PROBLEM REPORT ASL2010:035 2010/03/05 ASL DCC Cory Gilbert ASL CASY IU 00/?HN, 00/?HE 2006,202,00:00:00 2010,054,00:00:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4625 Invalid instrument response. This instrument has an amplitude dependent lowered response at longer periods. The effect is non-linear and is greater as the ground motion amplitude increases. Most likely this problem was caused by moisture in the feedback electronics box or the seismometer enclosure. The problem has most likely become worse over time. Although we recognize this problem we do not have a good way to describe it in the dataless SEED at this time, but we are working on it. END **************************************************************************** DATA PROBLEM REPORT DMCQC2011:0031 2011/07/22 IRIS DMC Gillian Sharer DMC 634A TA ?HN 2009,340,00:00:00 2011,202,13:29:00 Problem Description INVALID RESPONSE During this time period, the ?HN channel exhibited lower than expected amplitudes. END PROBLEM RESOLUTION REPORT DMCQC2011:0031 2011/07/22 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The problem was fixed by replacing the cable. Normal amplitudes were restored on 2011 day 202. END **************************************************************************** DATA PROBLEM REPORT ASL2005:117 2005/08/05 ASL DCC Valerie Peyton ASL GUMO IU */* 2005,216,04:41:00 2005,216,04:41:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 452 Timing IS in error, as clock is unlocked. GUMO sustained a direct lightning strike. The GPS system did not survive. Without a functioning GPS system, there is no way to guarantee timing quality in the data. Data should be considered mistimed and used with caution. END **************************************************************************** DATA PROBLEM REPORT DMCQC2011:0032 2011/07/22 IRIS DMC Gillian Sharer DMC 444A TA ?H? 2011,197,06:42:00 2011,198,01:42:00 Problem Description DEAD CHANNEL During this time period, the masses of TA.444A were locked and the station was non-seismic. END PROBLEM RESOLUTION REPORT DMCQC2011:0032 2011/07/22 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The masses were successfully unlocked on day 198 01:42. END **************************************************************************** DATA PROBLEM REPORT ASL2005:118 2005/08/05 ASL DCC Valerie Peyton ASL SDV IU */* 2005,216,21:14:00 2005,216,21:14:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 454 Timing MAY be in error, as GPS system is not operating consistently. The GPS system at SDV was not able to obtain a solid lock on the GPS satellites during this time. This caused the GPS system to not operate consistently, and produced timing jumps. Data should be used with caution. END **************************************************************************** DATA PROBLEM REPORT ASL2010:030 2010/01/25 ASL DCC Cory Gilbert ASL WAKE IU ALL CHANNELS 2007,319,00:00:00 2006,181,00:00:00 Problem Description OTHER This station has been upgraded to a Q330 digitizer. New metadata are available. An Episensor was installed in place of the FBA. The pre-existing STS-2-HG was replaced with a new STS-2-HG. END **************************************************************************** DATA PROBLEM REPORT ASL2005:115 2005/08/01 ASL DCC Valerie Peyton ASL SDV IU */* 2005,212,21:29:00 2005,212,21:29:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 454 Timing MAY be in error, as GPS system is not operating consistently. The GPS system at SDV was not able to obtain a solid lock on the GPS satellites during this time. This caused the GPS system to not operate consistently, and produced timing jumps. Data should be used with caution. END PROBLEM RESOLUTION REPORT ASL2005:115 2005/08/05 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The SDV GPS timing system recovered at 2005, 214, 11:41. Timing quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT DMCQC2011:0030 2011/07/08 IRIS DMC Peggy Johnson DMC I38A TA ?HZ 2011,158,30:00:00 2011,158,22:14:00 Problem Description OTHER I38A, a Guralp, exhibits SNOFLU-like behavior on Z beginning d 158. END PROBLEM RESOLUTION REPORT DMCQC2011:0030 2011/07/08 IRIS DMC Peggy Johnson Description of Problem Resolution RESOLUTION Fixed by a mass lock/unlock sequence started at 21:14 UTC. END **************************************************************************** DATA PROBLEM REPORT ASL2010:031 2010/03/05 ASL DCC Cory Gilbert ASL KIP IU 00/?HZ 2004,001,00:00:00 2006,181,00:00:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4625 Invalid instrument response. This instrument has an amplitude dependent lowered response at longer periods. The effect is non-linear and is greater as the ground motion amplitude increases. Most likely this problem was caused by moisture in the feedback electronics box or the seismometer enclosure. The problem has most likely become worse over time. Although we recognize this problem we do not have a good way to describe it in the dataless SEED at this time, but we are working on it. END **************************************************************************** DATA PROBLEM REPORT HRV1993:050 1993/09/14 Harvard WQC Misha Salganik ASL SSE CD LHE LHN 1993,000,92:08:04 1993,000,92:08:04 Problem Description LOW FREQUENCY NOISE Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1993:050 1993/10/07 ASL Tyler Storm Description of Problem Resolution Comment The low frequency noise at SSE was not caused by any equipment failure that we could find. Therefore, we are assuming that the horizontal channels are noisy due to some unidentified natural cause that cannot be removed. END **************************************************************************** DATA PROBLEM REPORT ASL2005:116 2005/08/04 ASL DCC Tyler Storm ASL GUMO IU 00/* 2005,216,04:47:00 2005,216,04:47:00 Problem Description OTHER SEED COMMENT REFERENCE C 4010 Channel is down. Data from the KS54000 are unuseable. END **************************************************************************** DATA PROBLEM REPORT DMCQC2011:0024 2011/06/03 IRIS DMC Peggy Johnson DMC F06A TA [BL]HN 2007,009,00:00:00 2007,023,1700:00:00 Problem Description DEAD CHANNEL N component went offscale and was recording only a aseismic signal. END PROBLEM RESOLUTION REPORT DMCQC2011:0024 2011/06/03 IRIS DMC Peggy Johnson Description of Problem Resolution RESOLUTION A mass recenter restored a seismic signal on the N component. END **************************************************************************** DATA PROBLEM REPORT DMCQC2011:0025 2011/06/06 IRIS DMC Peggy Johnson DMC F25A TA [BL]H[ENZ] 2009,198,04:00:00 2009,205,01:00:00 Problem Description DEAD CHANNEL F25A recorded only digitizer noise from aproximately 2009.198 0400 UTC to 2009.205 0100 UTC. END PROBLEM RESOLUTION REPORT DMCQC2011:0025 2011/06/06 IRIS DMC Peggy Johnson Description of Problem Resolution RESOLUTION Sensor was replaced. END **************************************************************************** DATA PROBLEM REPORT DMCQC2011:0022 2011/07/15 IRIS DMC Peggy Johnson DMC I34A TA BH? LH? 2011,129,08:54:00 2011,156,254:00:00 Problem Description DEAD CHANNEL The seismic channels are aseismic, recording only digitizer noise since a lightning strike destroyed equipment. END PROBLEM RESOLUTION REPORT DMCQC2011:0022 2011/07/15 IRIS DMC Peggy Johnson Description of Problem Resolution RESOLUTION Station serviced d 154. Several components were replaced: batteries, solar panels, sensor, sensor cable, and host box. Shortly after a mass recenter on d 156 at 02:47, the sensor settled down to normal operation. END **************************************************************************** DATA PROBLEM REPORT DMCQC2011:0023 2011/06/03 IRIS DMC Peggy Johnson DMC F03A TA [BL]H[ENZ] 2007,187,1800:00:00 2007,226,1930:00:00 Problem Description DEAD CHANNEL F03A recorded only digitizer noise from July 6, 2007 (d 187) 1800 UTC through August 14, 2007 (d 226) 1930 UTC. END PROBLEM RESOLUTION REPORT DMCQC2011:0023 2011/06/03 IRIS DMC Peggy Johnson Description of Problem Resolution RESOLUTION Swapped sensor. END **************************************************************************** DATA PROBLEM REPORT DMCQC2011:0028 2011/06/24 IRIS DMC Mary Templeton DMC JCT US ?H? 2011,168,18:28:00 2011,183,11:27:00 Problem Description DEAD CHANNEL The STS-2 went offline at the start of this time span. END PROBLEM RESOLUTION REPORT DMCQC2011:0028 2011/06/24 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION The sensor came back online on 2011,173 and data quality returned to normal around 11:27 UTC that day. END **************************************************************************** DATA PROBLEM REPORT DMCQC2011:0029 2011/06/26 IRIS DMC Mary Templeton DMC PASC CI 00/?H? 2011,174,18:17:00 2011,175,20:41:00 Problem Description DEAD CHANNEL All three channels of the STS-1 were offline from the beginning of this time span until 2011,175,17:17. END PROBLEM RESOLUTION REPORT DMCQC2011:0029 2011/06/26 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION The sensor was brought back online and data quality returned to normal by 2011,175,20:41. END **************************************************************************** DATA PROBLEM REPORT DMCQC2011:0026 2011/06/06 IRIS DMC Peggy Johnson DMC F25A TA [BL]H[ENZ] 2009,204,140:00:00 2009,212,1900:00:00 Problem Description DEAD CHANNEL Sensor not powered since last service visit, from 2009.0723 0140 UTC until 2009.0731 1900 UTC. END PROBLEM RESOLUTION REPORT DMCQC2011:0026 2011/06/06 IRIS DMC Peggy Johnson Description of Problem Resolution RESOLUTION Securely connected sensor power cable. END **************************************************************************** DATA PROBLEM REPORT DMCQC2011:0027 2011/06/21 IRIS DMC Peggy Johnson DMC G23A TA BH? LH? 2009,103,00:00:00 2009,115,202:00:00 Problem Description DATA DROPOUTS After the masses began to drift, several mass recenters were sent, none of which effected an improvement. Ultimately, the seismic channels went aseismic. END PROBLEM RESOLUTION REPORT DMCQC2011:0027 2011/06/21 IRIS DMC Peggy Johnson Description of Problem Resolution RESOLUTION Sensor replaced. END **************************************************************************** DATA PROBLEM REPORT IDA2011:008 2011/02/04 IDA DCC Erik Klimczak IDA ARU II *** 2010,298,00:00:00 2010,328,00:00:00 Problem Description OTHER IDA station ARU was down from day 2010,298-05:40 to 2010,328 due to faulty circuit boards in the DAS. END **************************************************************************** DATA PROBLEM REPORT ASL2005:160 2005/11/23 ASL DCC Valerie Peyton ASL QSPA IU 20/*H* 2005,326,09:15:00 2005,327,17:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. All three compnents of the STS2 at QSPA have fallen against their stops. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2005:160 2005/11/23 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION We were able to remotely center the QSPA STS2. Data quality returns to normal at 2005, 327, 17:00. END **************************************************************************** DATA PROBLEM REPORT IDA2011:009 2011/02/04 IDA DCC Erik Klimczak IDA AAK II BB*10 2010,343,00:00:00 2010,343,00:00:00 Problem Description OTHER The BB*10 channels from the STS-2 seismometer are showing long period pulses starting around day 2010,343 for reasons yet to be determined. END **************************************************************************** DATA PROBLEM REPORT ASL2005:161 2005/11/28 ASL DCC Valerie Peyton ASL OTAV IU 00/*HE 2005,330,16:12:00 2005,333,23:17:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The E component of the STS1 at OTAV is down. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2005:161 2007/01/23 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The OTAV STS1 E component recovered by itself. Data quality returns to normal at 2005, 333, 23:17. END **************************************************************************** DATA PROBLEM REPORT IDA2011:006 2011/02/04 IDA DCC Erik Klimczak IDA RPN II *** 2010,348,00:00:00 2010,348,00:00:00 Problem Description OTHER IDA station RPN is down due to the GPS clock becoming unlocked and problems with the digitizer. The station operator has cycled power and reconfigured connections to the GPS clock, and has been requested to cycle power to the DAS. A trip to upgrade the station is being prepared. END PROBLEM RESOLUTION REPORT IDA2011:006 2011/04/11 IDA Erik Klimczak Description of Problem Resolution RESOLUTION The station is back on-line as of day 2011,099-12:34 after an IDA engineer visited the station and upgraded it to a Quanterra Q330HR system. END **************************************************************************** DATA PROBLEM REPORT IDA2011:007 2011/02/04 IDA DCC Erik Klimczak IDA PFO II *** 2010,286,00:00:00 2010,286,00:00:00 Problem Description OTHER There are long period pulses on the vertical channels from the STS-1 seismometer since day 2010,286, for reasons yet to be determined. END PROBLEM RESOLUTION REPORT IDA2011:007 2011/02/23 IDA Erik Klimczak Description of Problem Resolution RESOLUTION Data quality for the STS-1 seismometer improved after an IDA engineer visited the station and replaced the base plate for the STS-1V and re-installed the seismometer. The long period pulses appear to have been caused by the seismometer losing vacuum. END **************************************************************************** DATA PROBLEM REPORT IDA2011:011 2011/02/04 IDA DCC Erik Klimczak IDA MSEY II *** 2011,014,00:00:00 2011,014,00:00:00 Problem Description OTHER IDA station MSEY is down as of day 2011,014-1700 due to problems with the DAS that are yet to be determined. In addition, there is a power outage at the station. The power company has removed power lines to the station. The station will remain down until power is restored. END PROBLEM RESOLUTION REPORT IDA2011:011 2011/12/15 IDA Erik Klimczak Description of Problem Resolution RESOLUTION Data acquisition at IDA station MSEY was restored on day 2011,210-11:57 after an IDA engineer visited the station and restored power and upgraded it to a Quanterra Q330HR system. END **************************************************************************** DATA PROBLEM REPORT ASL2005:168 2005/12/29 ASL DCC Tyler Storm ASL LVC IU 10/?HN, 10/?HE 2005,362,16:00:00 2005,363,17:11:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The horizontal channels from the CMG3-T are dead. END PROBLEM RESOLUTION REPORT ASL2005:168 2005/12/29 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION Horizontals are good at 2005,363,17:11:00. END **************************************************************************** DATA PROBLEM REPORT IDA2011:012 2011/02/04 IDA DCC Erik Klimczak IDA SHEL II *** 2011,012,00:00:00 2011,012,00:00:00 Problem Description OTHER IDA station SHEL is down as of day 2011,012-13:55 due to communication problems between the DAS and the ARS caused by failure of the remote power supply. A new power supply has been shipped to the station. END PROBLEM RESOLUTION REPORT IDA2011:012 2011/04/11 IDA Erik Klimczak Description of Problem Resolution RESOLUTION The station is back on-line as of day 2011,100-09:40 after the station operator replaced the remote power supply. END **************************************************************************** DATA PROBLEM REPORT ASL2005:169 2005/12/30 ASL DCC Tyler Storm ASL PMG IU 00/* 2005,363,17:00:00 2006,004,23:43:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. All channels from the STS-1 instruments are dead. ROBLEM RESOLUTION REPORT ASL2005:169 2006/01/05 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The PMG station operator replaced the CCU power supply. This fixed the problem with the STS1 instruments. Data quality returns to normal at 2006, 004, 23:43. END **************************************************************************** DATA PROBLEM REPORT ASL2005:166 2005/12/19 ASL DCC Valerie Peyton ASL COR IU 00/*H* 2005,352,20:30:00 2006,003,02:11:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. All three channels of the COR STS1 are dead. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2005:166 2006/01/03 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The COR station operator replaced the DMA1, which provides power to all three components of the STS1. This fixed the problem with all three instruments. Data quality returns to normal at 2006, 003, 02:11. END **************************************************************************** DATA PROBLEM REPORT IDA2011:010 2011/02/04 IDA DCC Erik Klimczak IDA MSEY II BBE-10 2011,012,00:00:00 2011,012,00:00:00 Problem Description OTHER The East-West channels from the CMG-3T seismometer are non-seismic as of day 2011,012-2021 for reasons yet to be determined. END PROBLEM RESOLUTION REPORT IDA2011:010 2012/06/28 IDA Erik Klimczak Description of Problem Resolution RESOLUTION The East-West channels from the CMG-3T seismometer are seismic and back in normal operating range as of day 2012,096-07:29 after IDA engineers visited the station and re-centered the CMG-3T seismometer. END **************************************************************************** DATA PROBLEM REPORT ASL2005:167 2005/12/28 ASL DCC Tyler Storm ASL TIXI IU 00/?HZ 2005,359,05:51:00 2006,005,08:34:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The mass of the STS-1 is against the stop. Data are unuseable. END PROBLEM RESOLUTION REPORT ASL2005:167 2006/01/05 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The TIXI station operator recentered the STS1 vertical component. Data quality returns to normal at 2006, 005, 08:34. END **************************************************************************** DATA PROBLEM REPORT IDA2011:015 2011/04/11 IDA DCC Erik Klimczak IDA PALK II *** 2011,094,00:00:00 2011,094,00:00:00 Problem Description OTHER The station is down as of day 2011,094-11:37 due to a faulty power supply. A new power supply is being shipped to the station. END PROBLEM RESOLUTION REPORT IDA2011:015 2011/06/17 IDA Erik Klimczak Description of Problem Resolution RESOLUTION IDA station PALK is back on-line as of day 2011,125-16:59 after the station operator replaced the power supply shipped from UCSD. END **************************************************************************** DATA PROBLEM REPORT ASL2005:164 2005/12/09 ASL DCC Tyler Storm ASL LSA IC 00/?HZ 2005,341,04:36:00 2006,036,03:21:00 Problem Description OTHER SEED COMMENT REFERENCE C 4630 Response may be invalid. The vertical STS-1 has a response problem. The seismometer may be in some sort of free period mode. Any impulse causes the instrument to "ring" at a 33 second period. END PROBLEM RESOLUTION REPORT ASL2005:164 2006/02/06 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The LSA station operator replaced the opto-coupler in the STS1 vertical feedback electronics box. Data quality returns to normal at 2006, 036, 03:21. END **************************************************************************** DATA PROBLEM REPORT IDA2011:016 2011/04/15 IDA DCC Erik Klimczak IDA MBAR II *** 2011,072,00:00:00 2011,072,00:00:00 Problem Description OTHER IDA station MBAR is down as of about day 2011,072 due to problems with the station computer that are yet to be determined. END PROBLEM RESOLUTION REPORT IDA2011:016 2011/06/17 IDA Erik Klimczak Description of Problem Resolution RESOLUTION IDA station MBAR is back on-line as of day 2011,142-07:01 after the station operator replaced the ISP and network switches with those given to him on his visit to UCSD. END **************************************************************************** DATA PROBLEM REPORT ASL2005:165 2005/12/19 ASL DCC Valerie Peyton ASL POHA IU 00/*H* 2005,350,14:50:00 2006,115,03:21:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. All three channels of the POHA 54000 died simultaneously. Data are not useable. END **************************************************************************** DATA PROBLEM REPORT IDA2011:013 2011/03/03 IDA DCC Erik Klimczak IDA HOPE II BB*-00 2011,055,00:00:00 2011,055,00:00:00 Problem Description OTHER Data quality for all channels from the STS-2 is poor since day 2010,055-02:30 for reasons yet to be determined. The channels are showing excessive spiking and noise. A trip to upgrade the station is underway. END PROBLEM RESOLUTION REPORT IDA2011:013 2011/04/06 IDA Erik Klimczak Description of Problem Resolution RESOLUTION Data quality for all channels from the STS-2 improved on day 2011,072-12:00 after an IDA engineer visited and upgraded the station to a Quanterra Q330HR system and replaced the STS-2. END **************************************************************************** DATA PROBLEM REPORT ASL2005:162 2005/11/28 ASL DCC Valerie Peyton ASL BILL IU 00/*HZ 2005,331,11:56:00 2005,333,12:04:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The Z component of the STS1 at BILL has fallen against a stop. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2005:162 2005/11/29 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The BILL station operator recentered the STS1 Z component. Data quality returns to normal at 2005, 333, 12:04. END **************************************************************************** DATA PROBLEM REPORT IDA2011:014 2011/04/06 IDA DCC Erik Klimczak IDA ALE II *** 2011,049,00:00:00 2011,091,00:00:00 Problem Description OTHER The station was down from day 2011,049-12:58 to day 2011,091 due to the GPS clock becoming unlocked. The station operator reports restoring normal data acquisition after cycling power to the GPS on day 2011,091. END **************************************************************************** DATA PROBLEM REPORT ASL2005:163 2005/11/30 ASL DCC Valerie Peyton ASL KIP IU 00/*HZ 2005,327,01:00:00 2005,339,20:00:00 Problem Description NOISE SEED COMMENT REFERENCE C 4509 Channel has elevated low frequency noise levels. The KIP STS1 Z component has excessive long-period noise. We suspect there is a problem with the feedback electronics. END PROBLEM RESOLUTION REPORT ASL2005:163 2006/01/26 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The noise on the KIP STS1 Z component disappeared of its own accord. Data quality returns to normal at 2005, 339 , 20:00. END **************************************************************************** DATA PROBLEM REPORT DMCQC2011:0020 2011/03/25 IRIS DMC Peggy Johnson DMC D12A TA ?HE 2008,208,00:00:00 2008,222,00:00:00 Problem Description DEAD CHANNEL END PROBLEM RESOLUTION REPORT DMCQC2011:0020 2011/03/25 IRIS DMC Peggy Johnson Description of Problem Resolution RESOLUTION Sensor replaced. cmg3t -> sts2. END **************************************************************************** DATA PROBLEM REPORT DMCQC2011:0021 2011/05/24 IRIS DMC Mary Templeton DMC RLMT US *H* 2011,141,22:50:00 2011,143,15:48:00 Problem Description OTHER All three STS-2 components were drifting significantly during this time period resulting in increased LP noise. END PROBLEM RESOLUTION REPORT DMCQC2011:0021 2011/05/24 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION The masses were recentered at 2011,153,15:48 and recording returned to normal by 2011,153,15:54. END **************************************************************************** DATA PROBLEM REPORT DMCQC2011:0013 2011/01/31 IRIS DMC Mary Templeton DMC WCN NN ?HE 2009,113,17:53:00 2009,163,17:15:00 Problem Description OTHER The E channel of the CMG-3T was near the stops and recorded no seismic energy during this time. END PROBLEM RESOLUTION REPORT DMCQC2011:0013 2011/01/31 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION This sensor failed and was removed for testing and maintenance on 2009,163. END **************************************************************************** DATA PROBLEM REPORT DMCQC2011:0014 2011/01/31 IRIS DMC Mary Templeton DMC WCN NN ?HE 2010,116,18:19:00 2010,121,00:00:00 Problem Description OTHER Despite the occurrence of events, the E channel of the CMG-3T recorded only broadband noise during this time span. END PROBLEM RESOLUTION REPORT DMCQC2011:0014 2011/01/31 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION Equipment was removed and the station was abandoned after 2010,120 due to vandalism. END **************************************************************************** DATA PROBLEM REPORT DMCQC2011:0011 2011/03/28 IRIS DMC Mary Templeton DMC TZTN US ?HN 2011,028,23:22:00 2011,086,17:28:00 Problem Description DEAD CHANNEL The N channel has zero amplitude. END PROBLEM RESOLUTION REPORT DMCQC2011:0011 2011/03/28 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION Replacing the sensor cable on 2011,086 restored normal recording quality. END **************************************************************************** DATA PROBLEM REPORT DMCQC2011:0012 2011/01/31 IRIS DMC Mary Templeton DMC WCN NN ?H? 2009,163,17:15:00 2010,116,18:17:00 Problem Description OTHER The CMG-3T at WCN failed and was removed for testing and maintenance. The station recorded no seismic energy during this time span. END PROBLEM RESOLUTION REPORT DMCQC2011:0012 2011/01/31 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION The sensor was reinstalled after maintenance. END **************************************************************************** DATA PROBLEM REPORT DMCQC2011:0017 2011/03/02 IRIS DMC Mary Templeton DMC ISA CI ?HN 2011,053,12:41:00 2011,053,12:41:00 Problem Description LOW FREQUENCY NOISE The N channel of this STS-1 began developing asymmetric LP pulses that are becoming more frequent with time. END **************************************************************************** DATA PROBLEM REPORT DMCQC2011:0018 2011/04/13 IRIS DMC Mary Templeton DMC DWPF IU 00.?H? 2011,069,19:55:00 2011,091,22:42:00 Problem Description DEAD CHANNEL The KS-54000 at DWPF abruptly stopped recording seismic energy at 2011,069,19:55:30. END PROBLEM RESOLUTION REPORT DMCQC2011:0018 2011/04/13 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION The sensor was brought back online at ~2011,091,22:42:16. After calibration on 2011,092-093, data quality appears to have returned to normal by 2011,093,12:00. END **************************************************************************** DATA PROBLEM REPORT DMCQC2011:0015 2011/02/18 IRIS DMC Mary Templeton DMC DGMT US HR.?HZ 2011,046,03:34:00 2011,047,08:31:00 Problem Description DATA LOGGER PROBLEM After a large pulse, the Z channel experienced a 160,000 count DC shift and elevated broadband noise levels with asymmetric amplitudes common. The problem affects only the Z channel and so appears to lie beyond the STS-2 mixing electronics. END PROBLEM RESOLUTION REPORT DMCQC2011:0015 2011/02/18 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION The channel recovered on its own and resumed recording with a normal amplitude spectrum by 2011,047,08:31. END **************************************************************************** DATA PROBLEM REPORT DMCQC2011:0016 2011/02/18 IRIS DMC Mary Templeton DMC KSU1 US --.?HZ 2011,039,21:26:00 2011,045,20:56:00 Problem Description INVALID RESPONSE After a large LP pulse (mass recenter?), the Z channel of the CMG-3Tb at KSU1 began recording with reduced amplitudes below 1 Hz. Amplitude decrease was -17dB at 80s. END PROBLEM RESOLUTION REPORT DMCQC2011:0016 2011/02/18 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION After a similar pulse on 2011,045, the Z channel resumed normal recording. END **************************************************************************** DATA PROBLEM REPORT DMCQC2011:0019 2011/03/22 IRIS DMC Mary Templeton DMC PKME US *H* 2011,076,18:46:00 2011,078,00:00:00 Problem Description OTHER The U and V components of the STS-2 at PKME began drifting so significantly that the E channel stopped recording seismic energy. Recording fidelity is also suspect on the N and Z channels during this time. END PROBLEM RESOLUTION REPORT DMCQC2011:0019 2011/03/22 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION The masses were recentered on 2011,080, after which data quality returned to normal. END **************************************************************************** DATA PROBLEM REPORT IDA2011:001 2011/02/04 IDA DCC Erik Klimczak IDA ALE II *** 2010,221,00:00:00 2010,263,00:00:00 Problem Description OTHER IDA station ALE was down from day 2010,221-16:44 to 2010,263-11:54 due to problems with the station processor. Data acquisition was restored after the station operator replaced the station processor. END **************************************************************************** DATA PROBLEM REPORT IDA2011:004 2011/02/04 IDA DCC Erik Klimczak IDA HOPE II *** 2010,306,00:00:00 2010,311,00:00:00 Problem Description OTHER IDA station HOPE was down from day 2010,306-03:22 to 2010,311-15:33 due to problems with the STS-2. The masses for the STS-2 were saturated. The channels for the STS-2 were restored to normal operating range after the station operator re-centered the masses for the STS-2. END **************************************************************************** DATA PROBLEM REPORT IDA2011:005 2011/02/04 IDA DCC Erik Klimczak IDA MSVF II *** 2010,351,00:00:00 2010,351,00:00:00 Problem Description OTHER IDA station MSVF has been down intermittently from day 2010,351 to 2010,355, and 2011,003 to present due to the GPS clock becoming unlocked. The station operator has cycled power to the GPS clock. A new GPS clock has been shipped to the station. END PROBLEM RESOLUTION REPORT IDA2011:005 2011/04/06 IDA Erik Klimczak Description of Problem Resolution RESOLUTION IDA station MSVF is back on-line as of day 2011,068-01:43 after the station operator replaced the GPS clock with one shipped from UCSD. END **************************************************************************** DATA PROBLEM REPORT IDA2011:002 2011/02/04 IDA DCC Erik Klimczak IDA ALE II *** 2010,275,00:00:00 2010,337,00:00:00 Problem Description OTHER The mass positions for the STS-2 were saturated from day 2010,275-08:00 to 2010,337-14:29. The channels for the STS-2 were restored to normal operating range after the station operator re-centered the masses for the STS-2. END **************************************************************************** DATA PROBLEM REPORT IDA2011:003 2011/02/04 IDA DCC Erik Klimczak IDA CMLA II BB*-10 2010,294,00:00:00 2010,294,00:00:00 Problem Description DEAD CHANNEL All channels from the CMG-3T seismometer are non-seismic due to a faulty CMG-3T sensor. END PROBLEM RESOLUTION REPORT IDA2011:003 2011/12/15 IDA Erik Klimczak Description of Problem Resolution RESOLUTION All channels from the CMG-3T seismometer have been restored as of day 2011,315-13:29 after an IDA engineer visited the station and replaced the faulty CMG-3T seismometer. END **************************************************************************** DATA PROBLEM REPORT DMCQC2011:0010 2011/01/21 IRIS DMC Mary Templeton DMC HUMO BK * 2010,348,18:27:00 2011,019,21:53:00 Problem Description OTHER The GPS clock at HUMO obtained no locks from the start of this time span to the end when the Q330 was replaced. Timing is unknown during this time span. (As background, this GPS clock obtained no locks from 2010,313 through 2010,340 and reported only a -0.0097 second clock error once it obtained a lock.) END **************************************************************************** DATA PROBLEM REPORT DMCQC2011:0002 2011/01/04 IRIS DMC Mary Templeton DMC PKME US *H* 2011,002,01:22:00 2011,003,18:00:00 Problem Description OTHER The U and V masses of this STS-2 began drifting significantly enough for seismic signal to become completely overtaken by noise. END PROBLEM RESOLUTION REPORT DMCQC2011:0002 2011/01/04 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION The instrument resumed recording seismic signal with fidelity after being recentered on 2011,001. END **************************************************************************** DATA PROBLEM REPORT ASL2010:007 2010/01/25 ASL DCC Cory Gilbert ASL COLA IU ALL CHANNELS 2009,190,00:00:00 2006,181,00:00:00 Problem Description OTHER This station has been upgraded to a Q330 digitizer. New metadata are available. END **************************************************************************** DATA PROBLEM REPORT HRV1993:095 1993/12/19 Harvard WQC Misha Salganik ASL ISA TS LHZ 1993,190,15:37:00 1993,190,15:00:00 Problem Description Problem Description LOW FREQUENCY NOISE Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1993:095 1994/04/22 ASL Tyler Storm Description of Problem Resolution Comment I have looked at these pulses on the ISA data, but I have not found the source. It's most likely some sort of sudden tilt in the vault, or a vacuum problem. Unless I find something conclusive, no further action will be taken. END **************************************************************************** DATA PROBLEM REPORT DMCQC2011:0003 2011/01/31 IRIS DMC Mary Templeton DMC TZTN US * 2010,341,23:00:00 2011,028,23:22:00 Problem Description DEAD CHANNEL After cultural activity at the site, the sensor went offline, leaving all three channels to record only digitizer noise. END PROBLEM RESOLUTION REPORT DMCQC2011:0003 2011/01/31 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION Following a site visit on 2011,028, channels E and Z resumed recording seismic energy, but the N channel had zero amplitude. END **************************************************************************** DATA PROBLEM REPORT ASL2010:008 2010/01/25 ASL DCC Cory Gilbert ASL COR IU ALL CHANNELS 2009,269,00:00:00 2006,181,00:00:00 Problem Description OTHER This station has been upgraded to a Q330 digitizer. New metadata are available. A Trillium 240 was added to the station. END **************************************************************************** DATA PROBLEM REPORT HRV1993:096 1993/12/19 Harvard WQC Misha Salganik ASL ISA TS BHN BHZ BHE 1993,209,18:07:00 1993,209,18:00:00 Problem Description Problem Description DATA GLITCHES Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1993:096 1994/04/14 ASL Tyler Storm Description of Problem Resolution Comment I am unsure of the source, but the disturbance on ISA is ground motion and not an equipment problem. END **************************************************************************** DATA PROBLEM REPORT HRV1993:097 1993/12/19 Harvard WQC Misha Salganik ASL KMI CD LHZ LHN LHE 1993,187,02:53:00 1993,187,02:00:00 Problem Description Problem Description DATA GLITCHES Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1993:097 1994/04/18 ASL Tyler Storm Description of Problem Resolution Comment Possibly the glitches are the operator testing some equipment; I don't know for sure. I looked at the next day of data after the problem, and it appeared OK. END **************************************************************************** DATA PROBLEM REPORT DMCQC2011:0001 2011/01/06 IRIS DMC Mary Templeton DMC TNA AK ?HN 2010,357,11:43:00 2010,363,19:15:00 Problem Description OTHER The N mass of the CMG-3TB drifted against its stops and stopped recording seismic energy. END PROBLEM RESOLUTION REPORT DMCQC2011:0001 2011/01/06 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION It resumed recording normally when the mass was recentered on 2010,363. END **************************************************************************** DATA PROBLEM REPORT HRV1993:098 1993/12/19 Harvard WQC Misha Salganik ASL KONO IU LHZ LHN 1993,189,10:35:00 1993,189,10:00:00 Problem Description Problem Description OTHER Dead channel. Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1993:098 1994/02/23 ASL Tyler Storm Description of Problem Resolution Comment We show a data outage between tapes from day 188,05:00 through 189,14:00. During this time frame, I do not have information on the the system, or individual channel status. END **************************************************************************** DATA PROBLEM REPORT DMCQC2011:0006 2011/01/06 IRIS DMC Mary Templeton DMC MCWV US *H* 2010,305,00:56:00 2010,350,18:28:00 Problem Description OTHER One or more masses of the STS-2 at MCWV began drifting significantly, resulting in increased long period noise on all three channels. END PROBLEM RESOLUTION REPORT DMCQC2011:0006 2011/01/06 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION After the masses were recentered on 2010,350, the station returned to original noise levels. END **************************************************************************** DATA PROBLEM REPORT ASL2010:003 2010/01/25 ASL DCC Cory Gilbert ASL ADK IU ALL CHANNELS 2009,200,00:00:00 2006,181,00:00:00 Problem Description OTHER This station has been upgraded to a Q330 digitizer. New metadata are available. A Trillium 240 was added to the station, as was a wind powered generator. END **************************************************************************** DATA PROBLEM REPORT HRV1993:099 1993/12/19 Harvard WQC Misha Salganik ASL NRIL II BHN BHE 1993,192,13:36:00 1993,192,13:36:00 Problem Description LOW FREQUENCY NOISE Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1993:099 1994/01/12 IDA Holly Given Description of Problem Resolution COMMENT This long-period transient of about 400 s period observed on the horizontal components is a known regular feature of the NRIL (Norilsk) station, where the sensors are deployed approximately 490 m below the surface in a working nickel mine. We do not know the exact cause of these transients but believe they are related to venting of the mine using large fans to clear explosion fumes. This occurs several times each working day after blasting periods. Each venting episode lasts for roughly one hour. There is not much we can do about these transients; the user may wish to note this comment for future reference END **************************************************************************** DATA PROBLEM REPORT DMCQC2011:0007 2011/01/06 IRIS DMC Mary Templeton DMC MSO US ?HZ 2009,204,19:22:00 2009,204,19:22:00 Problem Description LOW FREQUENCY NOISE The Z channel of this STS-2 has shown a DC shift of ~6 million counts since the station was equipped with a Q330 datalogger. This channel is also characterized by increased long-period noise. END **************************************************************************** DATA PROBLEM REPORT ASL2010:004 2010/01/25 ASL DCC Cory Gilbert ASL ANMO IU ALL CHANNELS 2008,182,20:00:00 2006,181,00:00:00 Problem Description OTHER This station has been upgraded to a Q330 digitizer. New metadata are available. END **************************************************************************** DATA PROBLEM REPORT DMCQC2011:0004 2011/01/06 IRIS DMC Mary Templeton DMC GMR CI * 2010,314,00:27:00 2010,322,20:41:00 Problem Description DATA DROPOUTS After servicing the site, little continuous realtime data was received until transmissions parameters could be optimized. END PROBLEM RESOLUTION REPORT DMCQC2011:0004 2011/01/06 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION Optimizing data transmission parameters allowed data to flow continuously again. END **************************************************************************** DATA PROBLEM REPORT ASL2010:005 2010/01/25 ASL DCC Cory Gilbert ASL BBSR IU ALL CHANNELS 2008,214,00:00:00 2006,181,00:00:00 Problem Description OTHER This station has been upgraded to a Q330 digitizer. New metadata are available. An STS-2-HG was added to the station. END **************************************************************************** DATA PROBLEM REPORT DMCQC2011:0005 2011/01/06 IRIS DMC Mary Templeton DMC ISA CI ?HZ 2010,354,20:27:00 2010,354,20:27:00 Problem Description INVALID RESPONSE On this date, the Z channel experienced an abrupt large pulse and DC shift, after which it became characterized by broadband noise. The channel still records seismic and microseismic energy when it exceeds the increased noise floor, but event amplitudes appear consistently larger than for accompanying channels. END **************************************************************************** DATA PROBLEM REPORT ASL2010:006 2010/01/25 ASL DCC Cory Gilbert ASL CHTO IU ALL CHANNELS 2009,262,14:35:27 2006,181,00:00:00 Problem Description OTHER This station has been upgraded to a Q330 digitizer. New metadata are available. END **************************************************************************** DATA PROBLEM REPORT DMCQC2011:0008 2011/01/06 IRIS DMC Mary Templeton DMC RLMT US *H* 2010,302,16:10:00 2010,313,18:22:00 Problem Description OTHER The V component of this STS-2 was near the stops during this time and not recording seismic signal with fidelity. END PROBLEM RESOLUTION REPORT DMCQC2011:0008 2011/01/06 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION Recentering the masses on 2010,313 allowed the station to resume recording seismic signal with fidelity. END **************************************************************************** DATA PROBLEM REPORT IDA2011:028 2011/09/27 IDA DCC Erik Klimczak IDA KAPI II *** 2011,221,00:00:00 2011,224,00:00:00 Problem Description OTHER IDA station KAPI was down from day 2011,221-13:47 to 2011,224-05:47 due to a power outage at the station. Data acquisition resumed when power was restored. END **************************************************************************** DATA PROBLEM REPORT DMCQC2011:0009 2011/01/14 IRIS DMC Peggy Johnson DMC O38A TA [BL]H[ENZ] 2010,322,22:23:00 2010,343,23:59:00 Problem Description OTHER All channels aseismic, likely due to extreme flooding which began at installation. END PROBLEM RESOLUTION REPORT DMCQC2011:0009 2011/01/14 IRIS DMC Peggy Johnson Description of Problem Resolution RESOLUTION Fixed with the swap of the sensor and other components. END **************************************************************************** DATA PROBLEM REPORT IDA2011:029 2011/09/27 IDA DCC Erik Klimczak IDA MBAR II *** 2011,243,00:00:00 2011,243,00:00:00 Problem Description OTHER IDA station MBAR is down as of day 2011,243-19:06 due to communication problems between the DAS and the ISP. The station operator visited the station to investigate and cycle power to the DAS. However, the station remains down due to suspected DAS failure. A replacement DAS is being prepared to ship to the station. END PROBLEM RESOLUTION REPORT IDA2011:029 2012/01/24 IDA Erik Klimczak Description of Problem Resolution RESOLUTION IDA station MBAR is back on-line as of day 2012,023-08:07 after the station operator replaced the DAS and Ethernet extender. END **************************************************************************** DATA PROBLEM REPORT IDA2011:033 2011/11/10 IDA DCC Erik Klimczak IDA RAYN II BHZ-00,LHZ-00 2011,276,00:00:00 2011,276,00:00:00 Problem Description DEAD CHANNEL The vertical channels from the CMG-3TB seismometer are non-seismic. Attempts to re-center the CMG-3TB have been unsuccessful. END **************************************************************************** DATA PROBLEM REPORT ASL2005:146 2005/10/31 ASL DCC Valerie Peyton ASL BILL IU 00/*HN 2005,302,16:40:00 2005,306,09:42:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The Z component of the STS1 at BILL has fallen against one of its stops. Data can be used with caution until 2005, 303, 10:37. After this time, data are not useable at all. END PROBLEM RESOLUTION REPORT ASL2005:146 2005/11/02 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The BILL station operator recentered the STS1 N component. Data quality returns to normal at 2005, 306, 09:42. END **************************************************************************** DATA PROBLEM REPORT IDA2011:034 2011/11/10 IDA DCC Erik Klimczak IDA JTS II *** 2011,272,00:00:00 2011,272,00:00:00 Problem Description OTHER IDA station JTS is down due to problems with the GPS clocks. A trip by an IDA engineer to replace the GPS antennas and the digitizers is being planned. END PROBLEM RESOLUTION REPORT IDA2011:034 2011/12/15 IDA Erik Klimczak Description of Problem Resolution RESOLUTION IDA station JTS is back on-line as of day 2011,318-20:46 after an IDA engineer visited the station and replaced the GPS antenna modules and cables. END **************************************************************************** DATA PROBLEM REPORT ASL2005:147 2005/11/01 ASL DCC Valerie Peyton ASL SDV IU 10/*HZ 2005,304,16:37:00 2005,306,15:14:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The Z component of the CMG3T at SDV has lost mass capture. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2005:147 2005/11/02 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION We were able to remotely recenter the SDV CMG3T. Data quality returns to normal at 2005, 306, 15:14. END **************************************************************************** DATA PROBLEM REPORT IDA2011:031 2011/09/27 IDA DCC Erik Klimczak IDA JTS II BHZ-00,LHZ-00 2011,241,00:00:00 2011,241,00:00:00 Problem Description DEAD CHANNEL The vertical channels from the STS-1 seismometer are not connected due to a faulty seismometer. The seismometer has been shipped back to UCSD for repair and replacement. END PROBLEM RESOLUTION REPORT IDA2011:031 2011/12/15 IDA Erik Klimczak Description of Problem Resolution RESOLUTION The vertical channels from the STS-1 seismometer have been restored as of day 2011,319-20:14 after an IDA engineer visited the station and replaced the seismometer. END **************************************************************************** DATA PROBLEM REPORT ASL2005:144 2005/10/26 ASL DCC Valerie Peyton ASL TATO IU 10/*H* 2005,296,19:50:00 2005,298,01:18:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. All three channels of the STS2 at TATO are dead. END PROBLEM RESOLUTION REPORT ASL2005:144 2005/10/26 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The problem was caused by a bad QAP board. The TATO station operator replaced the board, which fixed the problem with the data. Data quality returns to normal at 2005, 298, 01:18. END **************************************************************************** DATA PROBLEM REPORT IDA2011:032 2011/09/27 IDA DCC Erik Klimczak IDA KAPI II BH*-10,LH*-10 2011,256,00:00:00 2011,256,00:00:00 Problem Description OTHER All channels from the CMG-3T seismometer are non-seismic as of day 2011,256-21:17 for reasons yet to be determined. END PROBLEM RESOLUTION REPORT IDA2011:032 2013/03/07 IDA Erik Klimczak Description of Problem Resolution RESOLUTION All channels from the CMG-3T are seismic as of day 2013,061-03:57 after an IDA engineer visited the station and replaced the CMG-3T seismometer. END **************************************************************************** DATA PROBLEM REPORT ASL2005:145 2005/10/27 ASL DCC Valerie Peyton ASL GUMO IU */* 2005,273,09:42:00 2005,274,05:05:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 452 Timing IS in error, as clock is unlocked. The GPS system at GUMO was having problems during this time. Timing quality should be considered inaccurate. END PROBLEM RESOLUTION REPORT ASL2005:145 2005/10/27 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The problems with the GUMO GPS system were fixed at 2005, 274, 05:05. Timing quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT IDA2011:037 2011/12/23 IDA DCC Erik Klimczak IDA HOPE II LN200,EN200 2011,350,00:00:00 2011,350,00:00:00 Problem Description DEAD CHANNEL The East-West channels from the strong motion sensor at HOPE are non-seismic for reasons yet to be determined. END **************************************************************************** DATA PROBLEM REPORT ASL2005:142 2005/10/17 ASL DCC Valerie Peyton ASL RAR IU 10/*HN 2005,288,10:00:00 2005,290,15:13:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The N component of the CMG3T at RAR has fallen against its stop. For the first 2 days, large events are still visible. After that, data are not useable. END PROBLEM RESOLUTION REPORT ASL2005:142 2005/10/17 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION We were able to remotely recenter the CMG3T at RAR. Data quality returns to normal at 2005, 290, 15:13. END **************************************************************************** DATA PROBLEM REPORT ASL2005:143 2005/10/19 ASL DCC Valerie Peyton ASL CHTO IU 00/LDO 2003,304,07:53:00 2005,311,07:23:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The CHTO Paroscientific microbarograph has failed. It appears that a power surge may have damaged the DC-DC converter off of which the microbarograph operates. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2005:143 2006/05/10 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The CHTO Paroscientific microbarograph was replaced. Data quality returns to normal at 2005, 311, 07:23. END **************************************************************************** DATA PROBLEM REPORT IDA2011:035 2011/12/15 IDA DCC Erik Klimczak IDA JTS II BH*-10,LH*-10 2011,309,00:00:00 2011,348,00:00:00 Problem Description OTHER Data quality from the STS-2 seismometer was poor from day 2011,309 until day 2011,348 due to a faulty STS-2 seisometer. Data quality improved after the station operator replaced the STS-2 seismometer. END **************************************************************************** DATA PROBLEM REPORT ASL2005:140 2005/10/05 ASL DCC Valerie Peyton ASL TSUM IU 00/*HZ 2005,277,19:36:00 2005,279,07:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The Z component of the STS1 at TSUM has fallen against its stop. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2005:140 2005/10/06 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The TSUM station operator recentered the STS1 Z. Data quality returns to normal at 2005, 279, 07:00. END **************************************************************************** DATA PROBLEM REPORT IDA2011:036 2011/12/23 IDA DCC Erik Klimczak IDA ABKT II *** 2011,288,00:00:00 2011,288,00:00:00 Problem Description OTHER IDA station ABKT is down as of day 2011,288-08:05 due to timing problems caused by a bug in the software for the GPS clock. END PROBLEM RESOLUTION REPORT IDA2011:036 2012/03/20 IDA Erik Klimczak Description of Problem Resolution RESOLUTION IDA station ABKT is back on-line as of day 2012,071-07:58 after an IDA engineer visited the station and replaced the GPS clock. END **************************************************************************** DATA PROBLEM REPORT ASL2005:141 2005/10/10 ASL DCC Valerie Peyton ASL ANMO IU 10/*H* 2005,282,01:27:00 2005,284,13:50:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. All three components of the CMG3TB at ANMO are dead. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2005:141 2005/10/11 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The signal control unit on the ANMO CMG3TB failed. Once this was replaced, the instrument returned to operational order. Data quality returns to normal at 2005, 284, 13:50. END **************************************************************************** DATA PROBLEM REPORT ASL2010:001 2010/01/21 ASL DCC Cory Gilbert ASL NWAO IU 00 -- ALL CHANNELS 2009,310,04:47:00 2006,181,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE S 2007 Station down. The 54000 seismometer was lost on 2009,310,04:47 UTC. There are no data coming through. END PROBLEM RESOLUTION REPORT ASL2010:001 2010/10/05 ASL DCC Cory Gilbert Description of Problem Resolution RESOLUTION The instrument was replaced with KS54000 s/n 113 on 2010,268. Metadata has been updated. END **************************************************************************** DATA PROBLEM REPORT ASL2010:002 2010/01/25 ASL DCC Cory Gilbert ASL KONO IU 00/?H1 2009,258,14:57:00 2006,181,00:00:00 Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE C 4815 Channel has long period noise. QC noticed some lp noise on the ?H1 component of the STS-1 directly after the upgrade. After reporting to the field team, some work was done at the station and the noise seemed to be calming down. However, it started to come back as a random pulsing. As of today, it is a very cyclic (approx 3000 second) pulsing. END **************************************************************************** DATA PROBLEM REPORT IDA2011:030 2011/09/27 IDA DCC Erik Klimczak IDA JTS II *** 2011,140,00:00:00 2011,241,00:00:00 Problem Description OTHER IDA station JTS was decommissioned from day 2011,140 to 2011,241 for replacement of the pier and recording building. The station was brought back on-line after IDA enginneers visited the station and installed all equipment on the new pier and in the new recording building. END **************************************************************************** DATA PROBLEM REPORT ASL2005:148 2005/11/03 ASL DCC Tyler Storm ASL MAJO IU 00/*HZ 2005,207,00:00:00 2006,113,10:29:00 Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE C 4815 Channel has long period noise. The bell jar containing the vertical STS-1 at has lost vacuum. END PROBLEM RESOLUTION REPORT ASL2005:148 2006/04/25 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION An ASL field engineer replaced the MAJO STS1 Z component and its base plate. Data quality and noise levels return to normal at 2006, 113, 10:29. END **************************************************************************** DATA PROBLEM REPORT ASL2005:149 2005/11/04 ASL DCC Valerie Peyton ASL QSPA IU 20/*H* 2005,307,14:15:00 2005,308,15:42:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. All three compnents of the STS2 at QSPA have fallen against their stops. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2005:149 2005/11/04 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION We were able to remotely center the QSPA STS2. Data quality returns to normal at 2005, 308, 15:42. END **************************************************************************** DATA PROBLEM REPORT HRV1993:084 1993/11/21 Harvard WQC Misha Salganik ASL TLY II BHZ BHN BHE 1993,181,23:47:00 1993,181,23:47:00 Problem Description DATA GLITCHES END PROBLEM RESOLUTION REPORT HRV1993:084 1993/11/23 IDA Peter Davis Description of Problem Resolution Resolution This is the same problem and resolution described in HRV1993:033; field data are actually continuous but a bug in the compression portion of the SEED generation code at the DCC occasionally compresses the last sample of a continuous data stream incorrectly. Previously this error was observed only at a station volume (weekly tape) join, but here it occurs at a day join where the station volume was segmented prior to generation of a SEED volume. The spike therefore appears at what is the last sample of a continuous data stream. See Resolution Reports for HRV1993:033 and HRV1993:083. END **************************************************************************** DATA PROBLEM REPORT HRV1993:085 1993/12/19 Harvard WQC Misha Salganik ASL AAK II BHN 1993,190,15:37:00 1993,190,15:00:00 Problem Description Problem Description LOW FREQUENCY NOISE Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1993:085 1994/01/13 IDA Peter Davis Description of Problem Resolution Comment Given the size of the event (mb=5.9) and the distance (116 degrees), the lack of a prominent Pdiff phase does not surprise us. Filtering the data with a 3 pole Butterworth causal filter in the passband 0.01-5.0 Hz enhances prominent PP and SKS arrivals. Please see the Postscript file that was placed in /pub/qc/qc_ps. The noise level is consistent with the longer term behavior of the station over many days. END **************************************************************************** DATA PROBLEM REPORT HRV1993:086 1993/12/19 Harvard WQC Misha Salganik ASL ABKT II BHN 1993,187,02:53:00 1993,205,20:00:00 Problem Description Problem Description HIGH FREQUENCY NOISE Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1993:086 1994/01/13 IDA Peter Davis Description of Problem Resolution Comment The backazimuth of this event results in a 'natural polarization' of the horizontal components into radial (EW) and transverse (NS). For an event at this distance (113 degrees), one would not expect to observe any prominent transversely polarized body waves in this time segment. Phases which are discernible such as PP and SP or PS appear on the vertical and the radial (in this case, EW) components. Filtering the data with a 3 pole Butterworth causal filter in the passb and 0.5-5.0 Hz enhances a high frequency arrival at the time expected of PKiKP, but the amplitudes on both the horizontal components are larger than expected of such a phase, so this is probably registration of a small local event. Please see the Postscript file that was placed in /pub/qc/qc_ps. END **************************************************************************** DATA PROBLEM REPORT HRV1993:087 1993/12/19 Harvard WQC Misha Salganik ASL BAR TS LHN 1993,187,02:53:00 1993,187,02:00:00 Problem Description Problem Description POLARITY REVERSED Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1993:087 2000/06/19 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION There is too much noise in the data for the event on 1993,187 for me to make a determination on polarity of the north component at BAR. However, analysis of two larger events 5 and 6 days later (1993,192,13:36 and 1993,193,13:17) indicates that the polarity of the north component is fine. END **************************************************************************** DATA PROBLEM REPORT HRV1993:088 1993/12/19 Harvard WQC Misha Salganik ASL BAR TS LHZ LHN LHE 1993,209,18:07:00 1993,209,18:00:00 Problem Description Problem Description DATA DROPOUTS Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1993:088 1994/04/18 ASL Tyler Storm Description of Problem Resolution Comment Most likely the error at BAR (1 hour gap) was caused by problem with the system writing to the DAT drive. END **************************************************************************** DATA PROBLEM REPORT HRV1993:089 1993/12/19 Harvard WQC Misha Salganik ASL BDFB GT BHN BHE LHN LHE 1993,205,20:24:00 1993,205,20:00:00 Problem Description Problem Description LOW FREQUENCY NOISE Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1993:089 1994/04/13 ASL Tyler Storm Description of Problem Resolution Comment The noise level on the long-period horizontals at BDFB comes down to about the same level as the vertical around the middle of October. I cannot correlate any maintenance work to this change. It's possible that it took the seismometer several months to settle in. END **************************************************************************** DATA PROBLEM REPORT IDA2011:019 2011/06/17 IDA DCC Erik Klimczak IDA MBAR II BHN-10,LHN-10,VHN-10 2011,142,00:00:00 2011,142,00:00:00 Problem Description OTHER The North-South channels from the CMG-3T are flat-lined as of day 2011,142-07:01. A warm re-set of the DAS did not resolve the problem. The station operator has been requested to re-center the masses for the CMG-3T seismometer. END PROBLEM RESOLUTION REPORT IDA2011:019 2011/07/22 IDA Erik Klimczak Description of Problem Resolution RESOLUTION The North-South channels for the CMG-3T are back in normal operating range as of day 2011,186-11:33, after the station operator re-centered the masses for the CMG-3T. END **************************************************************************** DATA PROBLEM REPORT ASL2005:150 2005/11/04 ASL DCC Valerie Peyton ASL MA2 IU */* 2004,266,00:25:00 2004,267,23:04:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 454 Timing MAY be in error, as GPS system is not operating consistently. The GPS system at MA2 was not able to obtain a solid lock on the GPS satellites during this time. Timing quality should be considered suspect, and data should be used with caution. END PROBLEM RESOLUTION REPORT ASL2005:150 2005/11/04 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The MA2 GPS system obtained a solid lock on the satellite signal at 2004, 267, 23:04. Timing quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT IDA2011:017 2011/04/26 IDA DCC Erik Klimczak IDA FFC II *** 2011,116,00:00:00 2011,116,00:00:00 Problem Description OTHER Data acquisition at IDA station FFC is intermittent due to a power problem at the station. IDA engineers are working with the station operator to resolve the problem. END PROBLEM RESOLUTION REPORT IDA2011:017 2011/06/17 IDA Erik Klimczak Description of Problem Resolution RESOLUTION The station is back online as of day 2011,138-13:19 after the station operator replaced the power supply IDA engineers shipped from UCSD. END **************************************************************************** DATA PROBLEM REPORT IDA2011:018 2011/06/17 IDA DCC Erik Klimczak IDA AAK II *** 2011,139,00:00:00 2011,141,00:00:00 Problem Description OTHER IDA station AAK was down intermittently from day 2011,139-12:22 to 2011,140-03:57 and 2011,140-11:53 to 2011,141-02:18 due to power outages caused by inclement weather. END **************************************************************************** DATA PROBLEM REPORT IDA2011:022 2011/06/17 IDA DCC Erik Klimczak IDA TAU II *** 2011,142,00:00:00 2011,145,00:00:00 Problem Description OTHER IDA station TAU was down from day 2011,142-08:23 to 2011,145-00:39 due to problems with the microwave link between the DASs and station computer. The station came back on-line after the station operator replaced the link's power supply. END **************************************************************************** DATA PROBLEM REPORT ASL2005:157 2005/11/17 ASL DCC Valerie Peyton ASL SDV IU */* 2005,294,22:16:00 2005,297,05:39:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 454 Timing MAY be in error, as GPS system is not operating consistently. The GPS system at SDV was not able to obtain a solid lock on the GPS satellites during this time. This caused the GPS system to not operate consistently, and produced timing jumps. Data should be used with caution. END PROBLEM RESOLUTION REPORT ASL2005:157 2005/11/17 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The SDV GPS system obtained a solid lock on the satellite signal at 2005, 297, 05:39. Timing quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT IDA2011:023 2011/06/17 IDA DCC Erik Klimczak IDA PALK II BH*-00,LH*-00 2011,125,00:00:00 2011,125,00:00:00 Problem Description OTHER There is high background noise on all channels from the KS54000 seismometer for reasons yet to be determined. The noise has worsened since the station operator replaced the power supply. END **************************************************************************** DATA PROBLEM REPORT ASL2005:158 2005/11/21 ASL DCC Valerie Peyton ASL BILL IU 00/*HN 2005,324,04:50:00 2005,326,07:14:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The N component of the STS1 at BILL has fallen against one of its stops. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2005:158 2005/11/22 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The BILL station operator recenter the STS1 N component. Data quality returns to normal at 2005, 326, 07:14. END **************************************************************************** DATA PROBLEM REPORT IDA2011:020 2011/06/17 IDA DCC Erik Klimczak IDA MBAR II WDO 2011,142,00:00:00 2011,142,00:00:00 Problem Description OTHER The WDO barometer channel is not being acquired as of day 2011,142-07:01 due to problems with the USB port on the ISP. END PROBLEM RESOLUTION REPORT IDA2011:020 2012/05/04 IDA Erik Klimczak Description of Problem Resolution RESOLUTION The barometer was replaced when an IDA engineer upgraded the station on day 2012,109-09:07. END **************************************************************************** DATA PROBLEM REPORT ASL2005:155 2005/11/15 ASL DCC Tyler Storm ASL ANMO IU 10/*H* 2005,284,13:15:00 2005,284,13:15:00 Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE C 4509 Channel has elevated low frequency noise levels. All components have long-period noise. END **************************************************************************** DATA PROBLEM REPORT IDA2011:021 2011/06/17 IDA DCC Erik Klimczak IDA MBAR II *** 2011,144,00:00:00 2011,165,00:00:00 Problem Description OTHER IDA station MBAR was down from day 2011,144-17:08 to 2011,165-07:19 due to problems with the DAS. Data acquisition was restored after the station operator cycled power to the DAS. END **************************************************************************** DATA PROBLEM REPORT ASL2005:156 2005/11/17 ASL DCC Valerie Peyton ASL SDV IU 10/*HN 10/*HE 2005,320,22:22:00 2005,322,15:56:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The horizontal masses of the CMG3T at SDV have fallen against their stops. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2005:156 2005/11/18 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION We were able to remotely recenter the SDV CMG3T. Data quality returns to normal at 2005, 322, 15:56. END **************************************************************************** DATA PROBLEM REPORT IDA2011:026 2011/07/22 IDA DCC Erik Klimczak IDA KDAK II BHN-00,LHN-00,VHN-00 2009,223,00:00:00 2009,223,00:00:00 Problem Description OTHER The output of the KS-54000 North-South channel has been variable and anomalously low since day 2009,223 for unknown causes believed to be related to the sensor's downhole electronics. END **************************************************************************** DATA PROBLEM REPORT ASL2005:153 2005/11/07 ASL DCC Valerie Peyton ASL SDV IU */* 2005,310,14:06:00 2005,312,22:49:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 454 Timing MAY be in error, as GPS system is not operating consistently. The GPS system at SDV was not able to obtain a solid lock on the GPS satellites during this time. This caused the GPS system to not operate consistently, and produced timing jumps. Data should be used with caution. END PROBLEM RESOLUTION REPORT ASL2005:153 2005/11/10 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The SDV GPS timing system recovered at 2005, 312, 22:49. Timing quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT IDA2011:027 2011/07/22 IDA DCC Erik Klimczak IDA COCO II BH100,LH100 2011,189,00:00:00 2011,189,00:00:00 Problem Description OTHER Data quality for the North-South channels from the KS-54000 seismometer is poor as of day 2011,189-17:30 for reasons yet to be determined. END **************************************************************************** DATA PROBLEM REPORT ASL2005:154 2005/11/10 ASL DCC Tyler Storm ASL PTCN IU 00/*H* 2005,314,05:47:00 2005,357,18:43:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. All three channels of the STS2 at PTCN have gone dead. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2005:154 2005/12/29 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION STS-2 is back up at 2005,357,18:43:00. END **************************************************************************** DATA PROBLEM REPORT IDA2011:024 2011/07/22 IDA DCC Erik Klimczak IDA MBAR II *** 2011,172,00:00:00 2011,186,00:00:00 Problem Description OTHER IDA station MBAR was down from day 2011,172-20:20 to 2011,186-11:33 due to problems with the DAS. Data acquisition was restored after the station operator cycled power to the DAS. END **************************************************************************** DATA PROBLEM REPORT ASL2005:151 2005/11/07 ASL DCC Valerie Peyton ASL KIP IU 10/*H* 2005,308,19:50:00 2005,311,20:47:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. All three channels of the STS2 at KIP are dead. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2005:151 2005/11/07 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The KIP station operator was able to recenter the STS2. Data quality returns to normal at 2005, 311, 20:47. END **************************************************************************** DATA PROBLEM REPORT IDA2011:025 2011/07/22 IDA DCC Erik Klimczak IDA TAU II *** 2011,170,00:00:00 2011,170,00:00:00 Problem Description OTHER There is excessive background noise for data from all sensors for reasons yet to be determined. The noise is electromagnetic in nature and suspected from an external source. END PROBLEM RESOLUTION REPORT IDA2011:025 2011/12/15 IDA Erik Klimczak Description of Problem Resolution RESOLUTION Data quality at IDA station TAU improved and the excessive background noise ceased on day 2011,227-00:00. END **************************************************************************** DATA PROBLEM REPORT ASL2005:152 2005/11/07 ASL DCC Valerie Peyton ASL KIP IU 00/*H* 2005,308,19:53:00 2005,311,20:44:00 Problem Description NOISE SEED COMMENT REFERENCE C 4509 Channel has elevated low frequency noise levels. The KIP station operator was asked to change the positions of the calibration switches in the feeback electronic boxes of the STS1s. Unfortunately, this introduced excessive long-period noise on the instruments. END PROBLEM RESOLUTION REPORT ASL2005:152 2005/11/07 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The KIP station operator returned the calibration switches to their original positions. This eliminated the long-period noise problem. Data quality returns to normal 2005, 311, 20:44. END **************************************************************************** DATA PROBLEM REPORT HRV1993:090 1993/12/19 Harvard WQC Misha Salganik ASL BJI CD LHN LHE 1993,205,20:24:00 1993,205,20:00:00 Problem Description Problem Description LOW FREQUENCY NOISE Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1993:090 1994/01/06 ASL Tyler Storm Description of Problem Resolution Resolution The seismometers are located in a high noise area (ref. HRV1993:030). FYI - Originally the seismometers were supposed to be moved to a better site in Nov 93, but it didn't happen. Hopefully the relocation will take place withi n the first couple months of 1994. END **************************************************************************** DATA PROBLEM REPORT HRV1993:091 1993/12/19 Harvard WQC Misha Salganik ASL BJI CD LHN LHE 1993,209,07:49:00 1993,209,07:00:00 Problem Description Problem Description POLARITY REVERSED Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1993:091 1994/01/10 ASL Tyler Storm Description of Problem Resolution Comment The horizontal polarities were reversed at BJI when the system was upgraded on day 93, 161. The polarities will be corrected when the seismometers are move d to a better location (scheduled Feb/Mar 94). END **************************************************************************** DATA PROBLEM REPORT HRV1993:092 1993/12/19 Harvard WQC Misha salganik ASL DGR TS BHN BHE LHN LHE 1993,209,18:07:00 1993,209,18:00:00 Problem Description Problem Description LOW FREQUENCY NOISE Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1993:092 1994/08/09 ASL Tyler Storm Description of Problem Resolution Comment I don't know what caused the low-frequency noise at DGR. No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT HRV1993:093 1993/12/19 Harvard WQC Misha Salganik ASL ENH CD BHZ LHZ VHZ 1993,191,14:45:00 1993,193,12:24:00 Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE C 4504 Channel exibits high levels of low frequency noise. Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1993:093 1994/08/08 ASL Tyler Storm Description of Problem Resolution Comment We do not know what is causing the low-frequency noise at ENH. If we find an explanation, I will file a supplemental report. END **************************************************************************** DATA PROBLEM REPORT ASL2005:159 2005/11/21 ASL DCC Valerie Peyton ASL BILL IU 00/*HE 2005,324,11:08:00 2005,326,07:14:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The N component of the STS1 at BILL has fallen against one of its stops. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2005:159 2005/11/22 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The BILL station operator recenter the STS1 E component. Data quality returns to normal at 2005, 326, 07:14. END **************************************************************************** DATA PROBLEM REPORT HRV1993:094 1993/12/19 Harvard WQC Misha Salganik ASL ERM II BHN BHE 1993,205,20:24:00 1993,209,18:00:00 Problem Description Problem Description LOW FREQUENCY NOISE Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1993:094 1994/01/13 IDA Peter Davis Description of Problem Resolution Comment The body wave phases and particularly the surface waves which appear in the pass band 0.02-0.10 Hz encourage us to conclude that the horizontal components, though somewhat noisy at long periods, are well within the performance expected from this station close to the sea. Please see the Postscript file that was placed in /pub/qc/qc_ps. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:249 2006/11/16 IRIS DMC Mary Templeton DMC AAM US ?HE,?HN 2005,315,18:10:00 2006,178,11:14:00 Problem Description LOW FREQUENCY NOISE AAM.?HE has oscillatory noise of ~500 seconds in period and approximately 1700 counts. END PROBLEM RESOLUTION REPORT DMCQC2006:249 2006/11/16 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION AAM stopped transmitting data temporarily at 2006,178. When the station resumed transmission, the long-period noise was absent. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:248 2008/10/02 IRIS DMC Mary Templeton DMC AAM IM LH? 2005,154,00:00:00 2005,291,00:00:00 Problem Description INCORRECT TIME LH data with quality control flag R frequently lags the BH stream by 1 second from 6/3/05 (154) through 7/17/2005 (198). After installation of Q330 digitizers, an extra sample was being introduced into the LH stream during a post-processing step within 31-33 seconds after each time tear. END PROBLEM RESOLUTION REPORT DMCQC2006:248 2008/10/02 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION The post-processing step was corrected 2005,291 and no longer inserts an extra sample. The extra sample does not exist in data with quality flag Q for the affected times span END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:247 2006/11/16 IRIS DMC Mary Templeton DMC NV32 IM * 2005,247,12:08:00 2006,089,10:57:00 Problem Description HIGH FREQUENCY NOISE NV32 began experiencing high-frequency noise episodes during the night, ending at approximately 15:00-16:00 UTC or 08:00-09:00 local time each morning. The noise burst lasts from approximately 3 to 18 hours and consists of transient pulses every 20 seconds of up to 50,000 counts and smaller transient pulses each second of up to 2500 counts. The signal is stongest on BHZ, the top KS54000 component in the borehole and weakest (almost negligible) on BHE, the deepest borehole component. This noise is possibly an electromagnetic transmission. END PROBLEM RESOLUTION REPORT DMCQC2006:247 2006/11/16 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION The noise persisted until the sensor failed on 2006,089. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:245 2008/10/02 IRIS DMC Mary Templeton DMC ATTU IM ?H? 2005,230,21:47:00 2005,253,21:44:00 Problem Description DATA GLITCHES ATTU channels show episodes of excessive spiking making the data unusable. Problem time spans are as follows: 2005,230,21:47 2005,237,02:22 2005,238,22:37 2005,243,01:34 2005,245,02:58 2005,250,16:27 2005,252,16:44 2005,253,21:44 END PROBLEM RESOLUTION REPORT DMCQC2006:245 2008/10/02 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION Spiking ceased when all channels went dead 2005,254,02:48. When the station revived on 2005,295,05:28, the number of spikes was again at normal levels for ATTU. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:216 2006/02/27 IRIS DMC Mary Templeton DMC JCT US ??? 2006,042,00:06:00 2006,060,14:48:00 Problem Description DATA GLITCHES The Q330SR digiterzer at JCT began rebooting frequently, causing data dropouts and acausal glitches in the data. END PROBLEM RESOLUTION REPORT DMCQC2006:216 2006/03/14 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION Frequent reboots ceased after 2006,060,14:48. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:214 2006/02/14 IRIS DMC Peg Johnson DMC E04A TA ?H? 2006,043,03:20:00 2006,052,22:00:00 Problem Description Vertical channels went bad at 2006,043,03:20. Horizontal channels are of questionable quality. Probably extends to earlier time, however there is a decently recorded earthquake at 2006,041,22:47. Email from Jennifer: Mass positions for m1 are 10.6V and m2 is 4.0V. Mass recenters do not bring these values into the acceptable range. Visual inspection of the data has already noted obvious problems with the vertical component, and questionable quality for the horizontals. --Jennifer END PROBLEM RESOLUTION REPORT DMCQC2006:214 2018/10/09 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The sensor was replaced on 2006.052 22:00 UTC. END **************************************************************************** DATA PROBLEM REPORT UW1995:001 1995/03/06 University of Washington Ken Creager SPYDER DUG US LH? 1995,016,00:00:00 1995,016,00:00:00 Problem Description POLARITY REVERSED After rotating, the polarity of the transverse channel of the S wave for the Kobe earthquake is flipped relative to other stations in the United States. END PROBLEM RESOLUTION REPORT UW1995:001 2001/04/26 ASL DCC Valerie Peyton Description of Problem Resolution COMMENT Since we don't qc the US data, there is no way for us to respond to this dpr. No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:279 2006/04/14 IRIS DMC Mary Templeton DMC ATTU IM ?H? 2004,327,18:14:36 2004,337,10:34:13 Problem Description INCORRECT TIME There is a 1 second time difference between the coincidentally located KS54000 broadband sensor and the Geotech 23900 short period sensor at ATTU during this time span. The instrument which has correct timing could not be determined with confidence using traveltime residuals. END PROBLEM RESOLUTION REPORT DMCQC2006:279 2006/04/14 IRIS DMC Mary Templeton Description of Problem Resolution NONE Timing agreement between these collocated sensors was observed at 2004,337,10:34:13 and thereafter. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:278 2006/04/12 IRIS DMC Mary Templeton DMC NV31 IM BHZ 2004,302,22:28:00 2004,308,18:47:00 Problem Description OTHER The Z component of this CMG-3T pegged and remained at or near the stops. END PROBLEM RESOLUTION REPORT DMCQC2006:278 2006/04/12 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION The BHZ component of the CMG-3T at NV31 was recentered at 2004,308,18:47 UTC. END **************************************************************************** DATA PROBLEM REPORT ASL2001:108 2001/08/27 ASL DCC Tyler Storm ASL JOHN IU 10/?H1 2001,220,04:46:00 2003,209,07:14:00 Problem Description OTHER SEED COMMENT REFERENCE C 4010 Channel is down. Data from the H1 component of the CMG3-T are unusable. END PROBLEM RESOLUTION REPORT ASL2001:108 2003/11/06 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The CMG3-T-B at JOHN was replaced with a working instrument. Since the 54000 borehole instrument was also broken beyond on-site repair, the data streams from the working CMG3-T-B were moved to location code 00. Data quality returns to normal at 2003, 309, 07:14. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:277 2006/04/11 IRIS DMC Mary Templeton DMC ATTU IM ??? 2004,321,23:36:00 2004,321,23:37:00 Problem Description OTHER The broadband and short period sensors were swamped during a local event near the station (S-P = 2.7 seconds). During the strongest arrivals, the broadband KS54000 (BH?) channels show many segments of zero amplitude interspersed with high amplitude values. The short period (SHZ) instrument is clipped. END PROBLEM RESOLUTION REPORT DMCQC2006:277 2006/01/26 IRIS DMC Mary Templeton Description of Problem Resolution NONE ATTU records with fidelity in the absence of large nearby events. END **************************************************************************** DATA PROBLEM REPORT ASL2001:109 2001/08/28 ASL DCC Valerie Peyton ASL MAKZ IU 00/*HZ 2000,200,21:20:00 2000,200,21:20:00 Problem Description NOISE SEED COMMENT REFERENCE C 4520 Channel has occasional spiking. There is occasional spiking on the STS1-Z component at MAKZ. The amplitude and frequency of the spikes varies. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:276 2006/03/29 IRIS DMC Mary Templeton DMC WMOK US ??/?H? 2004,339,14:25:00 2004,342,19:40:00 Problem Description HIGH FREQUENCY NOISE Installed new Q330, STS-2SG sensor and ES-T 2g accelerometer. Data are characterized by cultural noise, gaps, tests and system reboots during this time period. No problem resolution report is needed. END **************************************************************************** DATA PROBLEM REPORT ASL2001:106 2001/08/20 ASL DCC Valerie Peyton ASL MA2 IU * 2001,208,08:38:00 2001,273,21:38:00 Problem Description OTHER SEED COMMENT REFERENCE S 451 Timing MAY be in error, as clock is unlocked. There is a problem with the clock at MA2. We are in the process of diagnosing whether the problem lies with the GPS antenna and receiver, or with the portion of the digitizer which time-stamps data. Once the problem is diagnosed, we will go about fixing it. Meanwhile, timing accuracy at MA2 is unreliable. END PROBLEM RESOLUTION REPORT ASL2001:106 2001/10/01 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The QVI board at MA2 had failed. We shipped a replacement board to the station and the station operator installed the new board on 2001,273. Timing is once more reliable at MA2. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:275 2006/03/28 IRIS DMC Mary Templeton DMC MIAR US ??/?H? 2004,346,21:01:00 2004,358,17:27:00 Problem Description OTHER One or more components of the STS-2 at MIAR are at or near the stops. END PROBLEM RESOLUTION REPORT DMCQC2006:275 2006/03/28 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION The STS-2 at MIAR may have been recentered during a data outage on 2004,348. END **************************************************************************** DATA PROBLEM REPORT ASL2001:107 2001/08/24 ASL DCC Valerie Peyton ASL DBIC GT *HN 2001,235,16:07:00 2001,240,15:43:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4625 Invalid instrument response. The N component of the KS54000 at DBIC is producing data with corrupt response. The N response is anywhere from 6dB to 16dB quieter than it should be throughout the entire response curve. The shape of the response curve is exactly as it should be, only the amplitude is incorrect. We do not know what caused the problem, but in many respects it appears that only half of the double-ended output of the instrument is being recorded. END PROBLEM RESOLUTION REPORT ASL2001:107 2001/10/03 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The N component of the KS54000 at DBIC is once again producing data with the correct response. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:274 2006/03/23 IRIS DMC Mary Templeton DMC ATTU IM ?H? 2006,081,09:43:00 2006,089,23:52:00 Problem Description DATA GLITCHES Data during this time show glitches in rapid succession on the order of 8,400,000 counts, probably due to temporary telemetry problems. No problem resolution resport is needed. END **************************************************************************** DATA PROBLEM REPORT ASL2001:104 2001/08/15 ASL DCC Valerie Peyton ASL HIA IC 00/*HZ 2001,225,23:46:00 2001,228,16:47:00 Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE C 4504 Channel exibits high levels of low frequency noise. The Z component of the STS1 at HIA is exhibiting inordinate levels of long period noise. The cause is currently unknown. END PROBLEM RESOLUTION REPORT ASL2001:104 2001/08/17 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Low frequency noise levels on the Z component of the STS-1 at HIA have returned to normal. Neither the source of nor the solution to the problem are currently known. Data quality is, however, back to normal. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:273 2006/03/15 IRIS DMC Mary Templeton DMC WUAZ US ??? 2005,072,20:44:00 2005,075,21:03:00 Problem Description DATA DROPOUTS Data gaps ensued when the Q680 digitizer at WUAZ was replaced with the current Q330 digitizer. Gaps occur every 750 to 800 seconds and last between 15 and 60 seconds, approximately. END PROBLEM RESOLUTION REPORT DMCQC2006:273 2006/03/15 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION Gaps were being introduced by a software issue on the server receiving telemetered Q330 data. The software reconfigured on the server and the gaps ceased. END **************************************************************************** DATA PROBLEM REPORT ASL2001:105 2001/08/20 ASL DCC Valerie Peyton ASL XMAS IU */* 2001,093,21:20:00 2001,093,21:20:00 Problem Description NOISE SEED COMMENT REFERENCE C 4510 Channel has frequent spiking. One of the masses of the STS-2 at XMAS is unresponsive to recentering. The triaxial nature of this instrument prevents this single pegged mass from completely corrupting the data. However, the masses' inability to move properly is causing excessive coherent spiking on all three data channels, as well as high levels of long period noise. Long period noise levels begin rising above normal at roughly 20 second period; and by 30 second's period, noise levels are about 20dB above normal. The instrument cannot be fixed by the station operator, so we are planning to send a field engineer at the earliest available opportunity. Fortunately, some events can still be resolved through the noise. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:272 2006/03/14 IRIS DMC Mary Templeton DMC DUG US ??? 2005,073,00:00:00 2005,075,23:02:00 Problem Description DATA DROPOUTS Data gaps ensued when the Q680 digitizer at DUG was replaced with the current Q330 digitizer. Gaps occur every 750 to 800 seconds and last between 15 and 60 seconds, approximately. END PROBLEM RESOLUTION REPORT DMCQC2006:272 2006/03/14 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION Gaps were being introduced by a software issue on the server receiving telemetered Q330 data. The software reconfigured on the server and the gaps ceased. END **************************************************************************** DATA PROBLEM REPORT ASL2001:102 2001/08/14 ASL DCC Valerie Peyton ASL WAKE IU *HU *HW 10/*HZ 10/*H2 1997,302,20:46:00 1999,044,08:28:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The vertical (U or Z) and nominal east (W or 2) components of the CMG3-T-B at WAKE have fallen against the stops. END PROBLEM RESOLUTION REPORT ASL2001:102 2001/08/14 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The vertical (U or Z) and nominal east (W or 2) components of the CMG3-T-B at WAKE were recentered on 1999,044. Data quality for these two components has returned to normal. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:271 2008/10/03 IRIS DMC Mary Templeton DMC WVOR US ?H? 2005,206,00:00:00 2005,206,00:00:00 Problem Description LOW FREQUENCY NOISE WVOR shows noticeable levels of low frequency diurnal thermal noise, particularly on the horizontal channels. END **************************************************************************** DATA PROBLEM REPORT ASL2001:103 2001/08/14 ASL DCC Valerie Peyton ASL WAKE IU 10/*H* 2000,130,08:11:00 2002,214,00:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. All three channels of the CMG3-T-B at WAKE are currently down. There is nothing the station operator can do to remedy the problem, as the entire instrument appears to be damaged. The next course of action will be for an ASL field engineer to visit the site, retrieve the instrument from its borehole, and determine whether repairs can be made onsite, or will have to be made here at the lab. END PROBLEM RESOLUTION REPORT ASL2001:103 2002/08/06 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The CMG3-T-B at WAKE needs to be returned to ASL for repairs. We have removed the instrument from the borehole to ship home. Since WAKE still has two other instruments (a KS54000 and an STS2), we have no plans to re-install the CMG3-T-B. If we can repair the instrument, we will probably use it for another station. END **************************************************************************** DATA PROBLEM REPORT ASL2001:100 2001/08/13 ASL DCC Valerie Peyton ASL WAKE IU LH1, LH2 1997,168,14:27:00 1997,175,14:30:00 Problem Description OTHER SEED COMMENT REFERENCE C 2200 Data quality compromised by rapid jumps in mean DC offset The mean value of these data streams jumps plus or minus 1.0e+06 counts, and remains constant for some time (anywhere from 30 minutes to several hours) and then drops back to the original mean value. Data between these large offsets appear to be ok. END PROBLEM RESOLUTION REPORT ASL2001:100 2001/08/13 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The data are back to normal as of the middle of the day on 1997,175. The reason for the problem is unknown. END **************************************************************************** DATA PROBLEM REPORT ASL2001:101 2001/08/13 ASL DCC Valerie Peyton ASL WAKE IU LHZ 1997,168,14:27:00 1997,170,07:25:00 Problem Description OTHER SEED COMMENT REFERENCE C 2200 Data quality compromised by rapid jumps in mean DC offset The mean value of these data streams jumps plus or minus 1.0e+06 counts, and remains constant for some time (anywhere from 30 minutes to several hours) and then drops back to the original mean value. Data between these large offsets appear to be ok. END PROBLEM RESOLUTION REPORT ASL2001:101 2001/08/13 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The data are back to normal as of early in the day on 1997,170. The reason for the problem is unknown. END **************************************************************************** DATA PROBLEM REPORT ASL2001:110 2001/08/28 ASL DCC Valerie Peyton ASL MAKZ IU *L* 20/*L* 1997,051,04:19:00 2002,238,04:37:00 Problem Description NOISE SEED COMMENT REFERENCE C 4520 Channel has occasional spiking. There is periodic spiking on all three components of the FBA23 at MAKZ. The source likely is moisture somewhere in the connectors, as the vault is rather wet most of the year. Some events are visible, and others are partially to completely obscured by the spiking. We will see if it is possible to dry out the instrument and keep it dry. END PROBLEM RESOLUTION REPORT ASL2001:110 2003/03/20 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The FBA23 at MAKZ was replaced. Data quality returns to normal at 2002, 238, 04:37. END **************************************************************************** DATA PROBLEM REPORT ASL2001:119 2001/09/13 ASL DCC Valerie Peyton ASL LVC IU 10/*HE 2001,255,14:08:00 2001,285,19:28:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The E component of the CMG3-T at LVC has fallen against the stop. Data are unuseable. END PROBLEM RESOLUTION REPORT ASL2001:119 2001/10/13 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The station operator at LVC recentered the CMG3-T late in the day on 2001,285. Data quality has returned to normal. END **************************************************************************** DATA PROBLEM REPORT ASL2001:117 2001/09/10 ASL DCC Valerie Peyton ASL NWAO IU */* 2001,253,04:50:00 2001,258,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. Field engineers were on location at NWAO during this time span working on the station; expect some problems with data quality and availability. The primary objective of this maintenance trip is to upgrade the KS36000I borehole instrument to a KS54000. Since the CMG3-T-B instrument shares a borehole with the old KS (and will with the new KS), it has to be removed from the hole in order for the old KS to be retrieved and the new KS to be installed. We will likely be telemetering digitizer noise while the instruments are out of their hole. Tests were run at various times during this time span. END PROBLEM RESOLUTION REPORT ASL2001:117 2001/09/19 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Field engineers left NWAO in working condition late in the day on 2001,257. END **************************************************************************** DATA PROBLEM REPORT ASL2001:118 2001/09/12 ASL DCC Valerie Peyton ASL RCBR IU 00/*** 2001,252,09:26:00 2001,264,19:15:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The KS54000 at RCBR is dead. It appears that the instrument may have been struck by lightning a number of times. We have contacted the station operator with instructions on how to repair the up-hole electronics that are usually burnt out by lightning strikes. If the problem is down-hole, it is doubtful that the problem can be fixed quickly. END PROBLEM RESOLUTION REPORT ASL2001:118 2001/09/21 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The problem with the KS54000 at RCBR was a result of a malfunctioning board in the data processor. The station operator replaced the board with a new one, and data quality is back to normal. END **************************************************************************** DATA PROBLEM REPORT ASL2001:115 2001/08/31 ASL DCC Valerie Peyton ASL MBWA IU 10/HH1 10/BH1 2001,237,05:40:00 2001,241,03:12:00 Problem Description POLARITY REVERSED SEED COMMENT REFERENCE C 4710 Channel has reversed polarity. The 1 (nominal E) component of the CMG3-T-B at MBWA has reversed polarity. END PROBLEM RESOLUTION REPORT ASL2001:115 2001/08/31 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION As of 2001,241,03:12, we are correcting the polarity of two of the data streams from the CMG3-T-B 1 component in acquisition. The data streams affected by this correction are HH1 and BH1. Data before this time must be corrected for polarity by the user. After this time, data polarity is correct. Acquisition with proper polarity for LH1 does not begin until 2001,243,00:08 (see ASL2001:116). END **************************************************************************** DATA PROBLEM REPORT ASL2001:116 2001/08/31 ASL DCC Valerie Peyton ASL MBWA IU 10/LH1 2001,237,05:40:00 2001,243,00:08:00 Problem Description POLARITY REVERSED SEED COMMENT REFERENCE C 4710 Channel has reversed polarity. The 1 (nominal E) component of the CMG3-T-B at MBWA has reversed polarity. END PROBLEM RESOLUTION REPORT ASL2001:116 2001/08/31 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION As of 2001,243,00:08, we are correcting the polarity of all three of the data streams from the CMG3-T-B 1 component in acquisition. Data before this time must be corrected for polarity by the user. After this time, data polarity is correct. Acquisition with proper polarity for HH1 and BH1 began at 2001,241,03:12 (see ASL2001:115). END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:283 2006/07/20 IRIS DMC Mary Templeton DMC MIAR US ?H? 2006,114,19:55:00 2006,115,16:21:00 Problem Description DEAD CHANNEL Data from MIAR contains digitizer noise following a vault upgrade until the sensor could be installed. END PROBLEM RESOLUTION REPORT DMCQC2006:283 2006/07/20 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION Sensor was installed and recording of seismic data began at 2006,115,16:52 after a brief outage. END **************************************************************************** DATA PROBLEM REPORT ASL2001:113 2001/08/31 ASL DCC Tyler Storm ASL FURI IU 10/?HN, 10/?HE 2001,084,06:27:00 2001,243,16:22:00 Problem Description OTHER SEED COMMENT REFERENCE C 4010 Channel is down. Horizontal data from the CMG3-T are unuseable. END PROBLEM RESOLUTION REPORT ASL2001:113 2001/10/03 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION Instrument was centered at 2001,243,16:22:00 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:282 2006/06/23 IRIS DMC Mary Templeton DMC GOGA US ?H? 2006,104,16:01:00 2006,169,15:30:00 Problem Description DEAD CHANNEL Data from GOGA contains digitizer noise. Sensors have not yet been installed pending redrilling of the borehole. END PROBLEM RESOLUTION REPORT DMCQC2006:282 2006/06/23 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION A new CMG-3TB was installed 2006,169. END **************************************************************************** DATA PROBLEM REPORT ASL2001:114 2001/08/31 ASL DCC Valerie Peyton ASL MBWA IU **/*** 2001,237,05:40:00 2001,249,07:25:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. Field engineers were on location at MBWA during this time span working on the station installation; expect some problems with data quality and availability. Calibrations and other tests were run at various times during this time span. END PROBLEM RESOLUTION REPORT ASL2001:114 2003/09/03 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Field engineers left MBWA in fantastic operational order at 2001, 249, 07:25. Unfortunately, the field engineers had to leave the station shut down: the telecommunications network needed to telemeter MBWA data was not completed on time, and data transmission was impossible. MBWA was officially turned on, and data collection resumed, at 2002, 043, 11:30. Data quality was not compromised in the least by this fallow period. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:281 2006/04/27 IRIS DMC Mary Templeton DMC DUG US ??/?HN ??/?HE 2004,267,02:07:00 2005,073,00:00:00 Problem Description CHANNEL ORIENTATION Horizontal channels of the STS-2 at DUG had reversed polarity during this time span. The metadata describes the correct channel orientations. END PROBLEM RESOLUTION REPORT DMCQC2006:281 2006/04/27 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION The STS-2 was replaced in the field on 2005,073. END **************************************************************************** DATA PROBLEM REPORT ASL2001:111 2001/08/29 ASL DCC Valerie Peyton ASL CPUP GT SHZ 2001,234,15:31:00 2002,079,19:38:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The Z component of the GS21 at CPUP appears to have lost mass capture. Data are unuseable. The problem may begin as early as 2001, 230, 14:22, but it is not possible to determine this for sure because of a gap in the data. END PROBLEM RESOLUTION REPORT ASL2001:111 2006/01/30 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The CPUP GS21 Z component was fixed at 2002, 079, 19:38. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2001:112 2001/08/30 ASL DCC Valerie Peyton ASL ANMO IU 10/*HZ 2001,241,18:46:00 2001,242,17:23:00 Problem Description NOISE SEED COMMENT REFERENCE C 4504 Channel exibits high levels of low frequency noise. The Z component of the CMG3-T-B at ANMO is exhibiting excessive levels of low- frequency noise. Beginning around 0.12Hz, the noise levels on the Z component are anywhere from 8dB to 35dB higher than the noise levels on the horizontals. The noise was likely precipitated by a lightning storm. We are investigating to see whether or not the noise problem can be fixed. END PROBLEM RESOLUTION REPORT ASL2001:112 2001/08/30 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION An ASL field engineer was able to fix the noise problem on the ANMO CMG3-T-B Z component roughly a day after the problem began. Data returns to normal quality late in the day on 2001,242. END **************************************************************************** DATA PROBLEM REPORT ASL2001:120 2001/09/20 ASL DCC Valerie Peyton ASL ENH IC 10/*H* 2001,262,04:03:00 2001,265,15:17:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. All three components of the STS2 at ENH are producing corrupt data. At least two of the masses are pegged. We are working with the station operator to correct the problem. END PROBLEM RESOLUTION REPORT ASL2001:120 2001/09/24 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The station operator ENH recentered the STS2, and data quality has returned to normal. END **************************************************************************** DATA PROBLEM REPORT ASL2001:121 2001/09/20 ASL DCC Valerie Peyton ASL QIZ IC 00/*H* 01/*H* 2001,262,02:55:00 2001,271,03:18:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. All three components of the STS2 at QIZ are producing corrupt data. At least two of the masses are pegged. We are working with the station operator to correct the problem. END PROBLEM RESOLUTION REPORT ASL2001:121 2001/10/01 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The station operator at QIZ recentered the STS2. Data quality returns to normal on 2001,271. END **************************************************************************** DATA PROBLEM REPORT ANSS2009:007 2009/05/07 ANSS DCC leo ANSS MVCO US *H* 2009,126,01:26:00 2009,126,01:26:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE S 2515 Data dropouts US_MVCO 2009,126,01:16 System Restarts END **************************************************************************** DATA PROBLEM REPORT ANSS2009:006 2009/04/22 ANSS DCC leo ANSS AAM US *H* 2009,084,01:40:00 2009,084,01:40:00 Problem Description DIGITIZER PROBLEM SEED COMMENT REFERENCE S 2507 Station down. US_NATX DAS problem nodata 2009,084,01:40 END **************************************************************************** DATA PROBLEM REPORT ANSS2009:009 2009/05/26 ANSS DCC leo ANSS DBIC GT *H* 2009,111,00:00:00 2009,121,00:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE S 2501 Data unusable. GT_DCIC No data 2009,111,00:00->121,00:00 END PROBLEM RESOLUTION REPORT ANSS2009:009 2009/05/26 ANSS DCC leo Description of Problem Resolution COMMENT GT_DCIC operational 2009,121,00:00 END **************************************************************************** DATA PROBLEM REPORT ANSS2009:008 2009/05/12 ANSS DCC leo ANSS REDW IW *H* 2009,112,03:17:00 2009,112,03:17:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE S 2501 Data unusable. IW_REDW 2009,112,03:17 Seismometer on stops END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:259 2008/10/02 IRIS DMC Mary Templeton DMC HLID US ?H? 2005,205,00:00:00 2005,205,00:00:00 Problem Description LOW FREQUENCY NOISE HLID shows noticeable levels of low frequency diurnal thermal noise, particularly on the horizontal channels. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:258 2008/10/02 IRIS DMC Mary Templeton DMC HAWA US * 2005,244,00:00:00 2005,257,17:19:00 Problem Description DATA GLITCHES The Q330 digitizer is rebooting frequently during this time span, causing data gaps and acausal glitches on power up. END PROBLEM RESOLUTION REPORT DMCQC2006:258 2008/10/02 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION The Q330 stopped rebooting for unknown reasons. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:257 2008/10/02 IRIS DMC Mary Templeton DMC HAWA US LH? 2005,076,00:00:00 2005,291,00:00:00 Problem Description INCORRECT TIME LH data with quality control flag R frequently lags the BH stream by 1 second from 3/17/05 (076) through 10/17/2005 (290). After installation of Q330 digitizers, an extra sample was being introduced into the LH stream during a post-processing step within 31-33 seconds after each time tear. END PROBLEM RESOLUTION REPORT DMCQC2006:257 2008/10/02 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION The post-processing step was corrected 2005,291 and no longer inserts an extra sample. The extra sample does not exist in data with quality flag Q for the affected times span. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:255 2008/10/02 IRIS DMC Mary Templeton DMC GOGA US ?H? 2005,272,00:00:00 2005,283,04:48:00 Problem Description OTHER One or more components of the STS-2 at GOGA are at or near the stops. Data may be unreliable. END PROBLEM RESOLUTION REPORT DMCQC2006:255 2008/10/02 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION The STS-2 at GOGA was recentered at 2005,283,04:48:39 UTC. END **************************************************************************** DATA PROBLEM REPORT ASL2001:128 2001/10/11 ASL DCC Valerie Peyton ASL NWAO IU 00/*H* 2001,283,14:16:00 2001,284,01:43:00 Problem Description OTHER SEED COMMENT REFERENCE C 1840 Calibration data Calibrations were being run on the 00 instrument (KS54000) at NWAO during this time span. END PROBLEM RESOLUTION REPORT ASL2001:128 2001/10/11 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Calibration of the 00 instrument at NWAO lasted approximately 11 hours. END **************************************************************************** DATA PROBLEM REPORT ANSS2009:003 2009/01/08 ANSS DCC leo ANSS PKME US *H* 2008,349,16:30:00 2008,349,16:30:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE S 2501 Data unusable. US_PKME Instrument on Stops' Data Unuseable Instrument UnResponsive Station Snowed in for Winter Season... END PROBLEM RESOLUTION REPORT ANSS2009:003 2009/08/18 ANSS DCC leo Description of Problem Resolution RESOLUTION US_PKME Station Operational after Maint trip. Back on line 2009,223,22:18 END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:253 2008/10/02 IRIS DMC Mary Templeton DMC GOGA US LH? 2004,347,00:00:00 2005,291,00:00:00 Problem Description INCORRECT TIME LH data with quality control flag R frequently lags the BH stream by 1 second from 12/12/04 (347) through 10/17/2005 (290). After installation of Q330 digitizers, an extra sample was being introduced into the LH stream during a post-processing step within 31-33 seconds after each time tear. END PROBLEM RESOLUTION REPORT DMCQC2006:253 2008/10/02 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION The post-processing step was corrected 2005,291 and no longer inserts an extra sample. The extra sample does not exist in data with quality flag Q for the affected times span. END **************************************************************************** DATA PROBLEM REPORT ASL2001:129 2001/10/11 ASL DCC Valerie Peyton ASL NWAO IU 10/* 2001,284,02:13:00 2001,284,12:54:00 Problem Description OTHER SEED COMMENT REFERENCE C 1840 Calibration data Calibrations were being run on the 10 instrument (CMG3-T-B) at NWAO during this time span. END PROBLEM RESOLUTION REPORT ASL2001:129 2001/10/11 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Calibration of the 10 instrument at NWAO lasted approximately 11 hours. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:252 2008/10/02 IRIS DMC Mary Templeton DMC DUG US LH? 2005,071,00:00:00 2005,291,00:00:00 Problem Description INCORRECT TIME LH data with quality control flag R frequently lags the BH stream by 1 second from 3/12/05 (071) through 10/17/2005 (290). After installation of Q330 digitizers, an extra sample was being introduced into the LH stream during a post-processing step within 31-33 seconds after each time tear. END PROBLEM RESOLUTION REPORT DMCQC2006:252 2008/10/02 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION The post-processing step was corrected 2005,291 and no longer inserts an extra sample. The extra sample does not exist in data with quality flag Q for the affected times span. END **************************************************************************** DATA PROBLEM REPORT ASL2001:126 2001/10/05 ASL DCC Valerie Peyton ASL KMBO IU */* 2001,278,08:00:00 2002,067,19:20:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 451 Timing MAY be in error, as clock is unlocked. Something has happened to timing at KMBO. We are not yet sure the cause of the timing problem, but we are investigating. END PROBLEM RESOLUTION REPORT ASL2001:126 2002/04/30 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION A new QVI board was installed at KMBO. The station clock is locked and giving good timing results as of 2002, 067, 19:20. END **************************************************************************** DATA PROBLEM REPORT ANSS2009:005 2009/02/03 ANSS DCC leo ANSS OGNE US *H* 2009,014,00:00:00 2009,016,16:00:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE S 2515 Data dropouts US_OGNE No Data available for 2009,014,00:00:00 -> 016,16:00:00 Data Gap. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:251 2008/10/02 IRIS DMC Mary Templeton DMC ACSO US ?H? 2005,154,00:00:00 2005,154,00:00:00 Problem Description DATA DROPOUTS ACSO began showing increased levels of diurnal thermal noise and decreased levels of high frequency cultural noise after the instruments were moved from a location in a public building to an outdoor vault. Low-frequency noise is most pronounced on the horizontal channels. END **************************************************************************** DATA PROBLEM REPORT ASL2001:127 2001/10/08 ASL DCC Valerie Peyton ASL FURI IU */* 2000,182,05:40:00 2001,278,11:42:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 452 Timing IS in error, as clock is unlocked. The QVI board at FURI went out of operation early in the day on 2000, 182. Without a functional QVI board, it is impossible for the data acquisition system to place accurate time stamps on the data. Much of the time the timing looks relatively good, but accuracy cannot be guaranteed. Another problem caused by the bad QVI board is an inconsistent sampling rate. This causes samples to be lost or mistimed. So not only is timing not reliable, but the data are terribly fragmented. END PROBLEM RESOLUTION REPORT ASL2001:127 2001/10/08 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION We sent a new QVI board to FURI, and the station operator replaced the bad board. Timing and sampling rate qualities are back to normal as of around mid-day on 2001,278. END **************************************************************************** DATA PROBLEM REPORT ANSS2009:004 2009/01/21 ANSS DCC leo ANSS MOOW IW *H* 2009,003,20:30:00 2009,008,16:34:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE S 2507 Station down. IW_MOOW No Data 2009,003->008,16:34 Station Comm down due to Weather? END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:250 2008/10/02 IRIS DMC Mary Templeton DMC ACSO US LH? 2005,155,00:00:00 2005,291,00:00:00 Problem Description INCORRECT TIME LH data with quality control flag R frequently lags the BH stream by 1 second from 6/4/05 (155) through 10/17/2005 (290). After installation of Q330 digitizers, an extra sample was being introduced into the LH stream during a post-processing step within 31-33 seconds after each time tear. END PROBLEM RESOLUTION REPORT DMCQC2006:250 2008/10/02 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION The post-processing step was corrected 2005,291 and no longer inserts an extra sample. The extra sample does not exist in data with quality flag Q for the affected times span. END **************************************************************************** DATA PROBLEM REPORT ASL2001:124 2001/10/01 ASL DCC Valerie Peyton ASL OTAV IU */* 2001,263,00:00:00 2001,280,05:50:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. One of our field engineers was at OTAV during this time, performing station maintenance work. Many calibrations were run during this time. Expect data quality inconsistencies and tests. END PROBLEM RESOLUTION REPORT ASL2001:124 2001/10/10 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Our field engineer left OTAV early in the day on 2001,280. The station is once more in normal operating condition. Among the tasks accomplished during this visit was the replacement of the STS1-E seismometer and feedback box. END **************************************************************************** DATA PROBLEM REPORT ASL2001:125 2001/10/03 ASL DCC Valerie Peyton ASL DBIC GT *HN 2001,275,20:27:00 2001,276,11:11:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4625 Invalid instrument response. The N component of the KS54000 at DBIC is producing data with corrupt response. The N response is roughly 30dB quieter than it should be throughout the entire response curve. The shape of the response curve is exactly as it should be, only the amplitude is incorrect. We do not know what caused the problem, but in many respects it appears that only half of the double-ended output of the instrument is being recorded. END PROBLEM RESOLUTION REPORT ASL2001:125 2001/10/03 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The N component of the KS54000 at DBIC is once again producing data with the correct response. END **************************************************************************** DATA PROBLEM REPORT ASL2001:122 2001/09/24 ASL DCC Valerie Peyton ASL CHTO IU */* 2001,221,00:00:00 2001,254,05:00:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 451 Timing MAY be in error, as clock is unlocked. The GPS clock at CHTO is broken during this time period. Data are being timed by the data acquisition system's internal clock. Timing accuracy cannot be guaranteed END PROBLEM RESOLUTION REPORT ASL2001:122 2001/09/24 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION A replacement GPS clock was sent to CHTO, and the station operator installed it. Timing is once more accurate. END **************************************************************************** DATA PROBLEM REPORT ASL2001:123 2001/09/24 ASL DCC Valerie Peyton ASL SNZO IU */* 2001,266,20:13:00 2001,270,03:05:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. A field engineer was on site at SNZO repairing the UPS system. Calibrations were also run during the visit. END PROBLEM RESOLUTION REPORT ASL2001:123 2001/10/05 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Both calibrations and UPS system repair at SNZO have been completed. The station is once more fully operational and producing good data. END **************************************************************************** DATA PROBLEM REPORT ASL2001:131 2001/10/15 ASL DCC Valerie Peyton ASL INCN IU 10/*H* 2001,285,04:20:00 2001,285,05:40:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. It appears from the STS2 data at INCN that someone was attempting to recenter the instrument during the above time span. The data are unuseable, and the magnitude 6.1 earthquake which occurred during this time span was not recorded by the STS2 (10 instrument). END PROBLEM RESOLUTION REPORT ASL2001:131 2001/10/15 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION After an hour and 20 minutes of messy data, INCN STS2 data quality returned to normal. END **************************************************************************** DATA PROBLEM REPORT ASL2001:132 2001/10/18 ASL DCC Valerie Peyton ASL KEV IU */* 2001,265,12:00:00 2001,266,12:00:00 Problem Description OTHER SEED COMMENT REFERENCE C 1840 Calibration data The station operator was running calibrations at this time. The calibrations were slightly non-standard, and the input amplitudes used were smaller than our standard input amplitudes. For more information, please contact ASL (gsnmaint@asl.cr.usgs.gov). END PROBLEM RESOLUTION REPORT ASL2001:132 2001/10/18 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Calibrations at KEV ended around noon GMT on 2001,266. Data quality returned to normal. END **************************************************************************** DATA PROBLEM REPORT ASL2001:130 2001/10/15 ASL DCC Valerie Peyton ASL GUMO IU 10/*HE 10/*HN 2001,285,15:03:00 2001,285,17:10:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The horizontal channels of the CMG3-T at GUMO were thrown to their stops by a near-by 7.0 earthquake on 2001,285. Only the Z component of this instrument was able to record the event properly. END PROBLEM RESOLUTION REPORT ASL2001:130 2001/10/15 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Someone, most likely the station operator, caught the problem with the CMG3-T N & E at GUMO and recentered the instrument about 2 hours after the onset of the event. Data quality returns to normal after the recentering. END **************************************************************************** DATA PROBLEM REPORT ANSS2009:018 2009/08/27 ANSS DCC Leo Sandoval ANSS CBKS US *H* 2008,146,00:00:00 2009,190,23:00:00 Problem Description OTHER SEED COMMENT REFERENCE S 2515 Data dropouts US_CBKS No Data for periods noted: 2008, 146 -> 147 2009, 019 2009, 127 -> 190 END **************************************************************************** DATA PROBLEM REPORT ANSS2009:017 2009/08/27 ANSS DCC Leo Sandoval ANSS BOZ US *H* 2008,063,00:00:00 2008,217,23:00:00 Problem Description NOISE SEED COMMENT REFERENCE S 2515 Data dropouts US_BOZ No Dat for the dates noted: 2008, 063 -> 076 2008, 207 -> 217 END **************************************************************************** DATA PROBLEM REPORT ANSS2009:019 2009/08/27 ANSS DCC Leo Sandoval ANSS ERPA US *H* 2008,182,00:00:00 2008,187,23:00:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE S 2515 Data dropouts US_ERPA No Data for : 2008, 182 -> 187 END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:269 2006/06/20 IRIS DMC Mary Templeton DMC WMOK US * 2004,033,00:00:00 2005,285,16:55:00 Problem Description LOW FREQUENCY NOISE WMOK showed noticeable levels of low frequency diurnal thermal noise, particularly on the horizontal channels until the vault type was changed during its EarthScope upgrade. END PROBLEM RESOLUTION REPORT DMCQC2006:269 2006/06/20 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION Diurnal thermal noise subsided with the installation of a Ceri-style vault 2005,284-292. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:267 2006/03/06 IRIS DMC Mary Templeton DMC MIAR US ??/?H? 2005,113,22:03:00 2006,031,21:40:00 Problem Description OTHER One or more components of the STS-2 at MIAR are at or near the stops. Frequently during earthquakes, various channels will show the wrong polarity or two channels may have very high correlation. Data is unreliable during this time span. The vault has probably tilted and the sensor has difficulty remaining centered for any length of time. END PROBLEM RESOLUTION REPORT DMCQC2006:267 2006/03/06 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION The STS-2 at MIAR was recentered at 2006,031,21:40:27 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:266 2008/10/03 IRIS DMC Mary Templeton DMC MIAR US ??/LH?/R 2004,342,00:00:00 2005,291,00:00:00 Problem Description INCORRECT TIME LH data with quality control flag R frequently lags the BH stream by 1 second from 12/07/04 (342) through 10/17/2005 (290). After installation of Q330 digitizers, an extra sample was being introduced into the LH stream during a post-processing step within 31-33 seconds after each time tear. END PROBLEM RESOLUTION REPORT DMCQC2006:266 2008/10/03 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION The post-processing step was corrected 2005,291 and no longer inserts an extra sample. The extra sample does not exist in data with quality flag Q for the affected times span. END **************************************************************************** DATA PROBLEM REPORT ASL2001:139 2001/10/31 ASL DCC Valerie Peyton ASL SFJ IU */* 2001,295,07:00:00 2001,303,14:53:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 451 Timing MAY be in error, as clock is unlocked. The GPS antenna at SFJ is damaged and the system is no longer receiving time stamps from the GPS clock. Timing in the data is not reliable. END PROBLEM RESOLUTION REPORT ASL2001:139 2001/10/31 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The station operator at SFJ has installed a temporary GPS antenna. This antenna has fixed the timing problems at SFJ. A permanent replacement for the GPS antenna was shipped today and will be installed when it arrives at the station. END **************************************************************************** DATA PROBLEM REPORT ANSS2009:014 2009/08/18 ANSS DCC leo ANSS CPUP GT *H* 2009,191,00:00:00 2009,205,00:00:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE S 2508 Data intermittant. GT_CPUP EXCESSIVE GAPS 2009,191 -> 205,00:00 END PROBLEM RESOLUTION REPORT ANSS2009:014 2009/08/18 ANSS DCC leo Description of Problem Resolution RESOLUTION GT_CPUP TELEMETRY PROBLEMS RESOLVED 2009,205,00:00 END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:264 2008/10/03 IRIS DMC Mary Templeton DMC JCT US LH? 2004,351,00:00:00 2005,291,00:00:00 Problem Description INCORRECT TIME LH data with quality control flag R frequently lags the BH stream by 1 second from 12/16/04 (351) through 10/17/2005 (290). After installation of Q330 digitizers, an extra sample was being introduced into the LH stream during a post-processing step within 31-33 seconds after each time tear. END PROBLEM RESOLUTION REPORT DMCQC2006:264 2008/10/03 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION The post-processing step was corrected 2005,291 and no longer inserts an extra sample. The extra sample does not exist in data with quality flag Q for the affected times span END **************************************************************************** DATA PROBLEM REPORT ANSS2009:013 2009/08/18 ANSS DCC leo ANSS BMO US *H* 2008,043,00:00:00 2008,356,23:59:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE S 2515 Data dropouts US_BMO for 2008 No data avail for the following time periods: 2008,043 -> 045 2008,135 -> 153 2008,230 -> 267 2008,356 END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:263 2008/10/02 IRIS DMC Mary Templeton DMC ISCO US ?H? 2005,117,19:00:00 2006,024,00:00:00 Problem Description CHANNEL ORIENTATION Horizontal channels of the STS-2 at ISCO had reversed polarity during this time span. The metadata describes the correct channel orientations. END PROBLEM RESOLUTION REPORT DMCQC2006:263 2008/10/02 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION The STS-2 was reoriented in the field on 2006,024. END **************************************************************************** DATA PROBLEM REPORT ASL2001:137 2001/10/26 ASL DCC Tyler Storm ASL COR IU 00/?HZ 2001,194,13:10:00 2001,208,21:22:32 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The Z mass is pegged; vertical data are unuseable. END PROBLEM RESOLUTION REPORT ASL2001:137 2002/12/03 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION Vertical instrument was centered 2001,208,21:22:32. END **************************************************************************** DATA PROBLEM REPORT ANSS2009:016 2009/08/18 ANSS DCC Leo Sandoval ANSS LBTB GT *H* 2009,198,12:16:00 2009,205,00:00:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE S 2515 Data dropouts GT_LBTB Excessive Gaps 2009,198,12:16 -> 205,00:00 END PROBLEM RESOLUTION REPORT ANSS2009:016 2009/08/18 ANSS DCC Leo Sandoval Description of Problem Resolution RESOLUTION GT_LBTB Telemerty Problems Resolved 2009 205,00:00 END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:262 2008/10/02 IRIS DMC Mary Templeton DMC ISCO US ??/??? 2005,119,19:17:00 2006,123,18:55:00 Problem Description OTHER Sensors cables were connected to the wrong digitizer ports. ?H? data for this time contains accelerometer data and ?L? data contains broadband data. END PROBLEM RESOLUTION REPORT DMCQC2006:262 2008/10/02 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION Sensor cables were switched to their intended digitizer ports at the site on 2005,123. END **************************************************************************** DATA PROBLEM REPORT ASL2001:138 2001/10/29 ASL DCC Tyler Storm ASL FURI IU 10/?HE 2001,253,13:48:00 2002,044,14:38:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. E/W data from the CMG-3 are unuseable. END PROBLEM RESOLUTION REPORT ASL2001:138 2002/03/19 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION Instrument was reset 2002,044,14:38. END **************************************************************************** DATA PROBLEM REPORT ANSS2009:015 2009/08/18 ANSS DCC Leo Sandoval ANSS DBIC GT *H* 2009,198,12:41:00 2009,205,00:00:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE S 2515 Data dropouts GT_DBIC EXCESSIVE GAPS 2009,198,12:41 ->205,00:00 END PROBLEM RESOLUTION REPORT ANSS2009:015 2009/08/18 ANSS DCC Leo Sandoval Description of Problem Resolution RESOLUTION GT_DBIC TELEMETRY PROBLEMS RESOLVED 2009,205,00:00 END **************************************************************************** DATA PROBLEM REPORT DMCQC2006:261 2006/03/03 IRIS DMC Mary Templeton DMC ISCO US ??/LH?/R 2005,118,00:00:00 2005,291,00:00:00 Problem Description INCORRECT TIME LH data with quality control flag R frequently lags the BH stream by 1 second from 4/28/05 (118) through 10/17/2005 (290). After installation of Q330 digitizers, an extra sample was being introduced into the LH stream during a post-processing step within 31-33 seconds after each time tear. END PROBLEM RESOLUTION REPORT DMCQC2006:261 2006/03/03 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION The post-processing step was corrected 2005,291 and no longer inserts an extra sample. The extra sample does not exist in data with quality flag Q for the affected times span. END **************************************************************************** DATA PROBLEM REPORT ASL2001:135 2001/10/22 ASL DCC Valerie Peyton ASL COLA IU 20/*L* 2001,023,17:49:00 2001,178,23:04:00 Problem Description DATA GLITCHES SEED COMMENT REFERENCE C 4502 Channel has intermittant high frequency noise. All three components of the FBA23 at COLA are exhibiting spiking and other forms of noise. Data quality is severely degraded. Pieces of earthquakes which arrive between spikes look good. END PROBLEM RESOLUTION REPORT ASL2001:135 2001/10/22 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The FBA23 at COLA appears to have recovered from whatever was causing the spiking. Data quality has returned to normal. END **************************************************************************** DATA PROBLEM REPORT ANSS2009:010 2009/05/28 ANSS DCC leo ANSS RLMT US *H* 2009,116,11:28:00 2009,116,11:28:00 Problem Description OTHER SEED COMMENT REFERENCE S 2501 Data unusable. US_RLMT Instrument lost capture 2009,116,11:28 Mass on stops no data avail END **************************************************************************** DATA PROBLEM REPORT ASL2001:136 2001/10/23 ASL DCC Valerie Peyton ASL DAV IU 10/*L* 1999,357,12:01:00 1999,357,12:01:00 Problem Description NOISE SEED COMMENT REFERENCE C 4420 Channel data quality is fair. All three components of the FBA-23 at DAV are exhibiting spiking and spurious signals. Sometimes these signals interfere with actual event signals, but most of the time they do not. The problem comes and goes. A likely source of the problem is moisture. END **************************************************************************** DATA PROBLEM REPORT ASL2001:133 2001/10/22 ASL DCC Valerie Peyton ASL ANMO IU 20/*N* 2001,141,16:40:00 2001,184,17:30:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The FBA23 at ANMO was not properly powered during this time period. As a result of improper power, the data are all bad. END PROBLEM RESOLUTION REPORT ASL2001:133 2001/10/22 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION A proper power source was connected to the FBA23 at ANMO on 2001,184 at 17:30. Data quality is normal from then on. END **************************************************************************** DATA PROBLEM REPORT ANSS2009:012 2009/08/18 ANSS DCC leo ANSS BOSA GT *H* 2009,198,12:49:00 2009,205,00:00:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE S 2515 Data dropouts GT_BOSA Excessive Gaps 2009, 198,12:49 -> 205,00:00 END PROBLEM RESOLUTION REPORT ANSS2009:012 2009/08/18 ANSS DCC leo Description of Problem Resolution RESOLUTION GT_BOSA telemetry problems resolved 2009,205,00 END **************************************************************************** DATA PROBLEM REPORT ASL2001:134 2001/10/22 ASL DCC Valerie Peyton ASL CTAO IU 10/*LN 2000,226,18:29:00 2001,311,01:16:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The N component of the FBA23 at CTAO is down. We are investigating the problem. END PROBLEM RESOLUTION REPORT ASL2001:134 2001/11/14 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The faulty FBA23 at CTAO was replaced with a new one. N channel data quality return to normal at 2001,311,01:16. END **************************************************************************** DATA PROBLEM REPORT ANSS2009:011 2009/05/28 ANSS DCC leo ANSS RLMT US *H* 2009,116,11:28:00 2009,139,04:39:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 2504 Little or no data available. US_RLMT 209,116,11:28 -> 139,04:39 No Data Instrument ReLeveled 139, 04:39 END PROBLEM RESOLUTION REPORT ANSS2009:011 2009/05/28 ANSS DCC leo Description of Problem Resolution COMMENT US RLMT Re Leveled 2009,139,04:39 END **************************************************************************** DATA PROBLEM REPORT ASL2001:142 2001/11/07 ASL DCC Tyler Storm ASL SNZO IU 10/?HN, 10/?HE 2001,309,02:27:00 2001,310,02:02:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. Horizontal data from the CMG3-T are unuseable. END PROBLEM RESOLUTION REPORT ASL2001:142 2001/11/07 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION Instrument was reset 2001,310,02:02:00. END **************************************************************************** DATA PROBLEM REPORT ASL2001:143 2001/11/08 ASL DCC Tyler Storm ASL XMAS IU * 2001,221,02:50:00 2001,221,02:50:00 Problem Description OTHER SEED COMMENT REFERENCE C 4010 Channel is down. Data from the STS-2 are unuseable. END **************************************************************************** DATA PROBLEM REPORT NEW 2010/10/14 OSU-MT Anna Kelbert ES CAN06 EM 2010,255,11:50 2010,279,16:33:00 2010,279,16:33:00 Problem Description DEAD CHANNEL Dead Hz channel throughout END **************************************************************************** DATA PROBLEM REPORT ASL2001:140 2001/11/02 ASL DCC Valerie Peyton ASL ADK IU */* 2001,005,04:15:00 2001,311,05:00:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 452 Timing IS in error, as clock is unlocked. The GPS clock at ADK appears to be broken. We have sent a replacement GPS clock and antenna, and the station operator will install the replacements at the next available opportunity. END PROBLEM RESOLUTION REPORT ASL2001:140 2001/11/14 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The ADK station operator replaced all the broken GPS parts, and timing quality returned to normal at 2001,311,05:00. END **************************************************************************** DATA PROBLEM REPORT ASL2001:141 2001/11/02 ASL DCC Valerie Peyton ASL TIXI IU 00/*HZ 2001,305,23:47:00 2001,308,07:35:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The Z component of the STS-1 at TIXI has fallen against the stop. Data quality is poor to worthless. The station operator will recenter the instrument at the next available opportunity. END PROBLEM RESOLUTION REPORT ASL2001:141 2003/05/19 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The Z component of the STS-1 at TIXI was recentered at 2001, 308, 07:35. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ANSS2009:029 2009/10/08 ANSS DCC Leo Sandoval ANSS RLMT US *H* 2009,261,14:21:00 2009,280,20:16:00 Problem Description OTHER SEED COMMENT REFERENCE S 2501 Data unusable. US_RLMT Instrument on Stops 2009,261,14:21 -> 280,20:16 Data Un Useable END **************************************************************************** DATA PROBLEM REPORT ASL2008:010 2008/10/31 ASL DCC Cory Gilberton ASL KIP IU 00/?HZ 2008,298,18:27:00 2007,113,16:00:00 Problem Description OTHER The mass position on the vertical component are against their stops. Data quality is poor and unusable. END **************************************************************************** DATA PROBLEM REPORT ANSS2009:028 2009/08/31 ANSS DCC Leo Sandoval ANSS MTDJ CU *H* 2009,183,00:00:00 2009,183,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE S 2515 Data dropouts CU_MTDJ Data Dropouts from 2009,183 END **************************************************************************** DATA PROBLEM REPORT ASL2008:011 2008/10/31 ASL DCC Cory Gilberton ASL JOHN IU 00/?H? 2008,302,08:49:00 2007,113,16:00:00 Problem Description NOISE SEED COMMENT REFERENCE C 4400 Channel data quality is very poor. There was a small drop in mass position for the vertical component of the CMG which resulted in noise in the data making it basically unusable. The horizontal components have been dead since the last station visit in the fall 2007. END **************************************************************************** DATA PROBLEM REPORT ASL2008:012 2008/10/31 ASL DCC Cory Gilberton ASL KIP IU 00/?HZ 2008,298,18:27:00 2007,113,16:00:00 Problem Description OTHER SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The mass positions on the STS1 vertical have fallen against its stops. Data is unusable. END PROBLEM RESOLUTION REPORT ASL2008:012 2010/03/25 ASL DCC Cory Gilbert Description of Problem Resolution RESOLUTION The instrument was re-centered, and data quality is good once again. END **************************************************************************** DATA PROBLEM REPORT ASL2008:013 2008/11/20 ASL DCC Cory Gilberton ASL HKT IU 00/?H? 2008,266,15:48:00 2008,323,16:07:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The STS1 is producing digitizer noise on all components: 00 ?HN started at 2008,266,15:48, ?HZ and ?HE started at 2008,306,15:57 END **************************************************************************** DATA PROBLEM REPORT ANSS2009:025 2009/08/27 ANSS DCC Leo Sandoval ANSS NATX US *H* 2008,031,00:00:00 2009,166,23:00:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE S 2515 Data dropouts US_MNTX No Data for Periods Noted: 2008, 031 -> 036 2008, 064 -> 068 2008, 071 2008, 258 2008, 294 2009, 085 -> 092 2009, 120 2009, 140 -> 166 END **************************************************************************** DATA PROBLEM REPORT ANSS2009:024 2009/08/27 ANSS DCC Leo Sandoval ANSS MSO US *H* 2008,361,00:00:00 2009,008,23:00:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE S 2515 Data dropouts US_MSO No Data for Periods Noted: 2008, 361 -> 362 2009, 003 -> 008 END **************************************************************************** DATA PROBLEM REPORT ASL2001:148 2001/11/26 ASL DCC Valerie Peyton ASL KMI IC 10/* 2001,307,11:15:00 2001,352,17:30:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The STS2 at KMI has failed and all three components are producing corrupt data. The station operator alerted us to the problem, but we do not have a precise start date. Once more data become available, we will refine the start date on the problem. Meanwhile, we will investigate repair and/or replacement possibilities. END PROBLEM RESOLUTION REPORT ASL2001:148 2002/02/13 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The STS2 at KMI was replaced on 2001, 352, 17:30. Data quality returns to normal with the installation of the replacement instrument. END **************************************************************************** DATA PROBLEM REPORT ANSS2009:027 2009/08/27 ANSS DCC Leo Sandoval ANSS OXF US *H* 2008,038,00:00:00 2009,190,23:00:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE S 2515 Data dropouts US_OXF No Data for Periods Noted: 2008, 038 -> 048 2008, 148 -> 149 2008, 151 -> 157 2008, 171 2008, 213 -> 234 2008, 264 2008, 275 2008, 364 -> 366 2009, 001 -> 004 2009, 100 2009, 146 2009, 163 -> 164 2009, 168 -> 190 END **************************************************************************** DATA PROBLEM REPORT ASL2001:149 2001/11/27 ASL DCC Valerie Peyton ASL BILL IU 00/*HZ 2001,331,07:16:00 2001,332,01:12:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The Z component of the STS1 at BILL has fallen against the stops. END PROBLEM RESOLUTION REPORT ASL2001:149 2001/11/28 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The BILL station operator recentered the STS1-Z on 2001,332,01:12. Data quality returned to normal. END **************************************************************************** DATA PROBLEM REPORT ANSS2009:026 2009/08/27 ANSS DCC Leo Sandoval ANSS NHSC US *H* 2009,019,00:00:00 2009,190,23:00:00 Problem Description OTHER SEED COMMENT REFERENCE S 2515 Data dropouts US_NHSC No Data for Periods Noted: 2009, 019 2009, 147 END **************************************************************************** DATA PROBLEM REPORT ASL2001:146 2001/11/23 ASL DCC Tyler Storm ASL MAKZ IU 10/* 2001,273,10:28:00 2001,274,19:06:00 Problem Description OTHER SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. Data from the STS-2 are unuseable. END PROBLEM RESOLUTION REPORT ASL2001:146 2002/04/18 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The MAKZ station operator recentered the STS2 on 2001, 274 at 19:06. Data quality returns to normal. END **************************************************************************** DATA PROBLEM REPORT ANSS2009:021 2009/08/27 ANSS DCC Leo Sandoval ANSS LBNH US *H* 2008,038,00:00:00 2009,022,23:00:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE S 2515 Data dropouts US_LBNH No data for periods noted: 2008, 038 -> 045 2009, 013 2009, 022 END **************************************************************************** DATA PROBLEM REPORT ASL2001:147 2001/11/23 ASL DCC Valerie Peyton ASL AFI IU 00/*HN 2001,068,21:40:00 2001,068,21:40:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The N component of the STS1 at AFI has fallen against the stop. Data are unuseable. END **************************************************************************** DATA PROBLEM REPORT ANSS2009:020 2009/08/27 ANSS DCC Leo Sandoval ANSS LAO US *H* 2008,001,00:00:00 2009,161,23:00:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE S 2515 Data dropouts US_LAO No data for periods noted 2008, 001 -> 015 2008, 210 -> 211 2009, 001 -> 161 END **************************************************************************** DATA PROBLEM REPORT ASL2001:144 2001/11/13 ASL DCC Valerie Peyton ASL KBS IU 00/*HN 2001,316,10:29:00 2001,326,15:42:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The N component of the STS1 at KBS has fallen against one of the stops. Data are currently useless. END PROBLEM RESOLUTION REPORT ASL2001:144 2001/11/23 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The KBS station operator recentered the N component of the STS1 at 2001,326 15:42. Data quality has returned to normal. END **************************************************************************** DATA PROBLEM REPORT ANSS2009:023 2009/08/27 ANSS DCC Leo Sandoval ANSS MNTX US *H* 2008,279,00:00:00 2008,324,23:00:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE S 2515 Data dropouts US_MNTX No Data for Periods Noted: 2008, 279 -> 324 END **************************************************************************** DATA PROBLEM REPORT ASL2001:145 2001/11/13 ASL DCC Valerie Peyton ASL INCN IU 00/* 10/* 2001,313,09:20:00 2002,080,02:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The three STS1 channels, as well as the three STS2 channels at INCN are inoperational. It appears that the QVI Master board in the INCN digitizer has malfunctioned. A replacement board has been sent to the station operator. END PROBLEM RESOLUTION REPORT ASL2001:145 2005/01/17 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION ASL field engineers were able to repair the digitizer board problems at INCN during a maintenance visit. The STS1 and STS2 channels resume recording with normal data quality at 2002, 080, 02:00. END **************************************************************************** DATA PROBLEM REPORT ANSS2009:022 2009/08/27 ANSS DCC Leo Sandoval ANSS LRAL US *H* 2008,011,00:00:00 2008,345,23:00:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE S 2515 Data dropouts US_LRAL No data for periods noted: 2008, 011 -> 021 2008, 049 -> 083 2008, 311 -> 345 END **************************************************************************** DATA PROBLEM REPORT ASL2001:153 2001/12/18 ASL DCC Tyler Storm ASL JOHN IU 10/*HZ 2001,326,05:33:00 2003,309,07:14:00 Problem Description OTHER SEED COMMENT REFERENCE C 4010 Channel is down. Data from the vertical component of the CMG3-T-B are unusable. END PROBLEM RESOLUTION REPORT ASL2001:153 2003/11/06 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The CMG3-T-B at JOHN was replaced with a working instrument. Since the 54000 borehole instrument was also broken beyond on-site repair, the data streams from the working CMG3-T-B were moved to location code 00. Data quality returns to normal at 2003, 309, 07:14. END **************************************************************************** DATA PROBLEM REPORT IDA2009:025 2009/09/21 IDA DCC Erik Klimczak IDA SACV II *** 2009,209,00:00:00 2009,209,00:00:00 Problem Description OTHER IDA station SACV is having persistant power problems since day 2009,209. This is causing intermittent gaps in data acquisition. A visit by an IDA engineer to upgrade the power system is being planned. END PROBLEM RESOLUTION REPORT IDA2009:025 2010/01/28 IDA Erik Klimczak Description of Problem Resolution RESOLUTION The power problems at IDA station SACV were resolved on day 2009,343 after an IDA engineer visited the station and upgraded the power system. END **************************************************************************** DATA PROBLEM REPORT ASL2001:154 2001/12/19 ASL DCC Valerie Peyton ASL TRQA IU 10/* 2001,352,18:33:00 2002,007,19:50:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. All three masses of the CMG3-T-B at TRQA are against their stops. We will ask the station operator to recenter the instrument at the next available opportunity. END PROBLEM RESOLUTION REPORT ASL2001:154 2002/02/22 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The TRQA station operator recentered the CMG3-T-B. Data quality returns to normal at 2002,007,19:50. END **************************************************************************** DATA PROBLEM REPORT IDA2009:026 2009/09/21 IDA DCC Erik Klimczak IDA RPN II *** 2009,250,00:00:00 2009,274,00:00:00 Problem Description OTHER IDA station RPN was down from day 2009,250 to 2009,274 due to damages to power equipment caused by a lightning strike. Data acquisition was restored after the station operator replaced the power inverter. END **************************************************************************** DATA PROBLEM REPORT ASL2001:151 2001/12/12 ASL DCC Valerie Peyton ASL TRQA IU 10/*HZ 10/*H1 2001,343,01:04:00 2001,343,01:04:00 Problem Description SPIKES SEED COMMENT REFERENCE C 4510 Channel has frequent spiking. There are coherent, mid-size spikes on the Z and 1 components of the CMG3-T-B at TRQA. The spikes occur every 800 - 850 seconds, and between each of these large spikes, 2 to 4 smaller spikes appear. All of the spikes are smallish in amplitude, but they distort the power spectra in the low frequencies. The spikes may have begun appearing as early as 2001,341,01:00 but we don't yet have the data for that time. END PROBLEM RESOLUTION REPORT ASL2001:151 2001/12/12 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Spiking on the Z and 1 components of the CMG3-T-B at TRQA ceased of its own accord on 2001,346,12:14. The source of the spikes is unknown, as is the cure for them. SUPPLEMENT This dpr has just been reopened: the spiking started up again on 2001,346,18:35. The cause is still unknown. END **************************************************************************** DATA PROBLEM REPORT IDA2009:023 2009/09/21 IDA DCC Erik Klimczak IDA NNA II *** 2009,217,00:00:00 2009,231,00:00:00 Problem Description OTHER IDA station NNA was down from day 2009,217 to 2009,231 due to problems with the DAS. An IDA engineer visited the site and replaced the power supply and CPU stack for the DAS, and restored data acquisition. END **************************************************************************** DATA PROBLEM REPORT ASL2001:152 2001/12/18 ASL DCC Tyler Storm ASL JOHN IU 10/*H2 2001,289,17:35:00 2003,309,07:14:00 Problem Description OTHER SEED COMMENT REFERENCE C 4010 Channel is down. Data from the H2 component of the CMG3-T are unusable. END PROBLEM RESOLUTION REPORT ASL2001:152 2003/11/06 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The CMG3-T-B at JOHN was replaced with a working instrument. Since the 54000 borehole instrument was also broken beyond on-site repair, the data streams from the working CMG3-T-B were moved to location code 00. Data quality returns to normal at 2003, 309, 07:14. END **************************************************************************** DATA PROBLEM REPORT IDA2009:024 2009/09/21 IDA DCC Erik Klimczak IDA KDAK II WDO-00 2009,218,00:00:00 2009,261,00:00:00 Problem Description DEAD CHANNEL The WDO channel from the paroscientific microbarometer showed excessive spiking from day 2009,218 to 2009,261. The station operator replaced the microbarometer and the channel is back in normal operating range. END **************************************************************************** DATA PROBLEM REPORT IDA2009:021 2009/07/02 IDA DCC Erik Klimczak IDA NNA II BB*-10 2009,167,00:00:00 2009,191,00:00:00 Problem Description DEAD CHANNEL All channels from the STS-2 seismometer were non-seismic from day 2009,167-14:47 to 2009,191-20:58. This was a result of testing being done to investigate excessive spiking on all horizontal channels at the station. END **************************************************************************** DATA PROBLEM REPORT ASL2001:150 2001/11/30 ASL DCC Valerie Peyton ASL MAJO IU * 1998,095,00:26:00 1999,110,00:00:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 451 Timing MAY be in error, as clock is unlocked. The GPS clock at MAJO is unlocked. Timing is unreliable. END PROBLEM RESOLUTION REPORT ASL2001:150 2001/11/30 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The timing problem at MAJO changed character on 1999,110. Please see ASL1999:032 for the next phase of the problem (which was not fixed entirely until 1999,116). END **************************************************************************** DATA PROBLEM REPORT IDA2009:022 2009/09/21 IDA DCC Erik Klimczak IDA ABKT II *** 2009,185,00:00:00 2009,185,00:00:00 Problem Description OTHER IDA station ABKT is down since day 2009,185 due to problems with the DAS. The station operator replaced the DAS on 2009,239 but the station remains down due to excessive reboots caused by communication problems between the DAS and ISP. END PROBLEM RESOLUTION REPORT IDA2009:022 2010/01/28 IDA Erik Klimczak Description of Problem Resolution RESOLUTION Data acquisition was restored on day 2009,339 after IDA engineers visited the station and replaced the GPS clock, and reconfigured cables in the DAS. END **************************************************************************** DATA PROBLEM REPORT ASL2008:001 2008/03/26 ASL DCC Cory Gilberton ASL XAN IC 00/?HZ 2008,056,09:28:00 2007,113,16:00:00 Problem Description DEAD CHANNEL Mass is pegged as of day 056 of 2008 at approximately 09:28. END PROBLEM RESOLUTION REPORT ASL2008:001 2010/08/25 ASL DCC Cory Gilbert Description of Problem Resolution RESOLUTION The instrument has been re-centered and is operating normally again. END **************************************************************************** DATA PROBLEM REPORT IDA2009:020 2009/07/02 IDA DCC Erik Klimczak IDA JTS II BB*-00 2009,174,00:00:00 2009,174,00:00:00 Problem Description DEAD CHANNEL All channels from the STS-1 seismometers are non-seismic as of day 2009,174-20:55 for reasons yet to be determined. END PROBLEM RESOLUTION REPORT IDA2009:020 2009/09/21 IDA Erik Klimczak Description of Problem Resolution RESOLUTION The broadband channels from the STS-1 seismometer were restored as of day 2009,230 after an IDA engineer visited the station and replaced the E300 seismometer electronics. END **************************************************************************** DATA PROBLEM REPORT ASL2008:002 2008/10/02 ASL DCC Tyler Stormton ASL WMQ IC 10/?HZ, 10/?HN 2008,051,08:08:00 2007,113,16:00:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4605 Channel has low sensitivity. Sensitivities for the STS-2 vertical and north/south channels are 5db low. END **************************************************************************** DATA PROBLEM REPORT ASL2008:003 2008/10/15 ASL DCC Cory Gilberton ASL BBSR IU 00/?H? 2008,265,16:22:00 2007,113,16:00:00 Problem Description OTHER SEED COMMENT REFERENCE C 4400 Channel data quality is very poor. There are numerous DC shifts and long period noise during this time frame. The following are approximate start times: ?H2 - 2008,265,16:22 ?HZ - 2008,283,19:50 ?H1 - 2008,285,02:41 Data quality is poor. END **************************************************************************** DATA PROBLEM REPORT ASL2008:004 2008/10/15 ASL DCC Cory Gilberton ASL BJT IC 00/BHZ 2007,272,08:00:00 2007,113,16:00:00 Problem Description HIGH FREQUENCY NOISE SEED COMMENT REFERENCE C 2603 Large high frequency noise. The STS1 vertical has noise at 2 Hz and higher END PROBLEM RESOLUTION REPORT ASL2008:004 2010/08/05 ASL DCC Cory Gilbert Description of Problem Resolution RESOLUTION The high frequency noise is gone as of 2010,203. There some spots in the data from 2010,202 that looked like free period oscillations. There was a new vertical sensor sent to the station, but it is unclear at this point whether it was installed or the sensor was repaired in some other way. END **************************************************************************** DATA PROBLEM REPORT ASL2008:005 2008/10/15 ASL DCC Cory Gilberton ASL WMQ IC 10/?HZ , 10/?HE 2008,051,08:08:00 2007,113,16:00:00 Problem Description OTHER SEED COMMENT REFERENCE C 4625 Invalid instrument response. There has been a sensitivity drop for the ?HZ and ?HE components of the STS2. The vertical component dropped by about 6 dB and the E/W component dropped by about 4 dB. END **************************************************************************** DATA PROBLEM REPORT ASL2008:006 2008/10/15 ASL DCC Cory Gilberton ASL GRFO IU ?H? 2008,217,00:00:00 2007,113,16:00:00 Problem Description DATA LOGGER PROBLEM The Q330 is resetting numerous times a day resulting 2.7-3.0 hour chunks of data throughout the day. END PROBLEM RESOLUTION REPORT ASL2008:006 2010/03/25 ASL DCC Cory Gilbert Description of Problem Resolution RESOLUTION The Q330 on-site was replace and the gaps are gone now. Unfortunately, the gaps were still present during the Chilean event. END **************************************************************************** DATA PROBLEM REPORT ASL2008:007 2008/10/16 ASL DCC Cory Gilberton ASL XAN IC 00/?HZ 2008,056,09:30:00 2007,113,16:00:00 Problem Description OTHER SEED COMMENT REFERENCE C 4010 Channel is down. The STS1 vertical component has fallen against its stops. Data are not usable. END **************************************************************************** DATA PROBLEM REPORT ASL2008:008 2008/10/16 ASL DCC Cory Gilberton ASL XAN IC 10/?H? 2008,250,01:38:00 2007,113,16:00:00 Problem Description OTHER SEED COMMENT REFERENCE C 4605 Channel has low sensitivity. Following a large pulse in the data on 2008,250,01:38 all three components of STS2 show a ~5-6dB drop in sensitivity. END **************************************************************************** DATA PROBLEM REPORT IDA2009:027 2009/09/21 IDA DCC Erik Klimczak IDA KURK II *** 2009,178,00:00:00 2009,261,00:00:00 Problem Description OTHER IDA station KURK had timing issues due to problems with the DAS and GPS clock from day 2009,178 to 2009,261. The station operator replaced the GPS clock on day 2009,240 but the clock remained unlocked. A replacement DAS was sent and installed which resolved the timing issue. END **************************************************************************** DATA PROBLEM REPORT ASL2008:009 2008/10/16 ASL DCC Cory Gilberton ASL LSA IC 10/?HE 2006,105,00:00:00 2007,113,16:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The STS2 E/W component is dead. Data are unusable. END **************************************************************************** DATA PROBLEM REPORT IDA2009:028 2009/10/06 IDA DCC Erik Klimczak IDA NNA II *** 2009,273,00:00:00 2009,273,00:00:00 Problem Description OTHER IDA station NNA is down since day 2009,273-1420 due to problems with the DAS. A replacement DAS is being prepared to ship to the station. END PROBLEM RESOLUTION REPORT IDA2009:028 2010/01/28 IDA Erik Klimczak Description of Problem Resolution RESOLUTION IDA station NNA came back on-line on day 2009,303 after the station operator replaced the DAS. END **************************************************************************** DATA PROBLEM REPORT ANSS2009:030 2009/11/30 ANSS DCC Leo Sandoval ANSS EYMN US HR_HL* 2009,313,23:50:00 2009,322,22:50:00 Problem Description DATA LOGGER PROBLEM SEED COMMENT REFERENCE S 2515 Data dropouts US_EYMN No HL Data 2009,313,23:50 --. 322,22:50 END **************************************************************************** DATA PROBLEM REPORT ASL2001:155 2001/12/20 ASL DCC Valerie Peyton ASL NWAO IU 10/* 2001,354,06:52:00 2001,354,08:50:00 Problem Description OTHER SEED COMMENT REFERENCE C 1840 Calibration data Calibrations were being run on the 10 instrument (CMG3-T-B) at NWAO during this time span. END PROBLEM RESOLUTION REPORT ASL2001:155 2001/12/20 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Calibration of the 10 instrument at NWAO lasted approximately 2 hours. END **************************************************************************** DATA PROBLEM REPORT IDA2009:014 2009/07/02 IDA DCC Erik Klimczak IDA NIL II *** 2009,123,00:00:00 2009,123,00:00:00 Problem Description OTHER IDA station NIL is down as of day 2009,123-10:26 due to damage to the DAS and ARS caused by lightning. END PROBLEM RESOLUTION REPORT IDA2009:014 2012/04/11 IDA Erik Klimczak Description of Problem Resolution RESOLUTION Data acquisition at IDA station NIL was restored on day 2012,088 after IDA engineers upgraded the station to a Quanterra Q330HR system. END **************************************************************************** DATA PROBLEM REPORT IDA2009:015 2009/07/02 IDA DCC Erik Klimczak IDA MSEY II *** 2009,123,00:00:00 2009,127,00:00:00 Problem Description OTHER IDA station MSEY was down from day 2009,123-00:37 to 2009,127-11:36 due to communication problems between the DAS and ARS. Data acquisition was restored after the station operator cycled power to the DAS. END **************************************************************************** DATA PROBLEM REPORT IDA2009:012 2009/07/02 IDA DCC Erik Klimczak IDA ASCN II *** 2009,073,00:00:00 2009,142,00:00:00 Problem Description OTHER IDA station ASCN was down from day 2009,073 to 2009,142. Data acquisition was restored after an IDA engineer visited the station and upgraded it to a Quanterra Q330HR system. END **************************************************************************** DATA PROBLEM REPORT IDA2009:013 2009/07/02 IDA DCC Erik Klimczak IDA MSEY II *** 2009,107,00:00:00 2009,111,00:00:00 Problem Description OTHER IDA station MSEY was down from day 2009,107-16:28 to 2009,111-10:38 due to problems with the DAS. Data acquisition was restored after the station operator cycled power to the DAS. END **************************************************************************** DATA PROBLEM REPORT IDA2009:010 2009/07/02 IDA DCC Erik Klimczak IDA BFO II UAN,UAE 2009,098,00:00:00 2009,098,00:00:00 Problem Description DEAD CHANNEL The UAN and UAE channels from the Askania vertical pendula are non- functional as of day 2009,098-12:07. The Askania pendula were disconnected and will be reconnected after they are relocated within the site. END **************************************************************************** DATA PROBLEM REPORT IDA2009:011 2009/07/02 IDA DCC Erik Klimczak IDA JTS II BH*-10,BL*-10 2009,112,00:00:00 2009,122,00:00:00 Problem Description DEAD CHANNEL The short period channels from the STS-2 seismometer were saturated from day 2009,112-17:36 to 2009,122-00:00. The channels were restored after an IDA engineer recentered the masses for the STS-2. END **************************************************************************** DATA PROBLEM REPORT IDA2009:018 2009/07/02 IDA DCC Erik Klimczak IDA RPN II BB*-10 2009,171,00:00:00 2009,171,00:00:00 Problem Description DEAD CHANNEL All channels from the STS-2 seismometer are non-seismic since day 2009,171 due to a faulty sensor. END PROBLEM RESOLUTION REPORT IDA2009:018 2010/03/08 IDA Erik Klimczak Description of Problem Resolution RESOLUTION The BB*10 channels are seismic as of day 2010,048-18:10, after the station operator replaced the STS-2 seismometer with one shipped from UCSD. END **************************************************************************** DATA PROBLEM REPORT IDA2009:019 2009/07/02 IDA DCC Erik Klimczak IDA JTS II *** 2009,156,00:00:00 2009,161,00:00:00 Problem Description OTHER IDA station JTS was down from day 2009,156 to 2009,161 due to communication problems between the DAS and the ISP. Data acquisition was restored after the station operator visited the station and reconfigured the uplink cables in the vault, followed by an IDA engineer cycling power to the digitizers. END **************************************************************************** DATA PROBLEM REPORT IDA2009:016 2009/07/02 IDA DCC Erik Klimczak IDA FFC II *** 2009,127,00:00:00 2009,132,00:00:00 Problem Description OTHER IDA station FFC was down from day 2009,127-20:00 to 2009,132-21:16 due to problems with the DAS and ARS. Data acquisition was restored after the station operator cycled power to the DAS and ARS. END **************************************************************************** DATA PROBLEM REPORT IDA2009:017 2009/07/02 IDA DCC Erik Klimczak IDA RPN II *** 2009,139,00:00:00 2009,171,00:00:00 Problem Description OTHER IDA station RPN was down from about day 2009,139 to 2009,156 due to a faulty power supply. The station operator reported replacing the power supply, however the station remained down due to GPS problems. The GPS clock began functioning normally again without action on day 2009,171. END **************************************************************************** DATA PROBLEM REPORT IDA2009:003 2009/03/04 IDA DCC Erik Klimczak IDA ASCN II BBN-10 2008,164,00:00:00 2008,164,00:00:00 Problem Description DEAD CHANNEL The north-south channels from the CMG3-T seismometer are non-seismic. The sensor needs to be recentered. END PROBLEM RESOLUTION REPORT IDA2009:003 2009/07/02 IDA Erik Klimczak Description of Problem Resolution RESOLUTION The north-south channels from the CMG3-T seismometer were restored on day 2009,143 after an IDA engineer visited the station and replaced the CMG-3T sensor. END **************************************************************************** DATA PROBLEM REPORT IDA2009:004 2009/03/04 IDA DCC Erik Klimczak IDA WRAB II BB*-10 2009,019,00:00:00 2009,026,00:00:00 Problem Description DEAD CHANNEL The masses for the STS-2 seismometer drifted out of normal operating range on day 2009,019. The mass position was adjusted and normal operation resumed on day 2009,026. END **************************************************************************** DATA PROBLEM REPORT IDA2009:001 2009/03/04 IDA DCC Erik Klimczak IDA OBN II BHN-10 2008,328,00:00:00 2008,355,00:00:00 Problem Description DEAD CHANNEL The North-South short period channels from the CMG3-T seismometer were saturated from about day 2008,328-18:50 to 2008,355-13:41. END **************************************************************************** DATA PROBLEM REPORT IDA2009:002 2009/03/04 IDA DCC Erik Klimczak IDA NIL II BB*-10 2009,004,00:00:00 2009,006,00:00:00 Problem Description DEAD CHANNEL The high gain short period channels from the Trillium seismometer were saturated from about day 2009,004-22:50 to 2009,006-18:00. END **************************************************************************** DATA PROBLEM REPORT IDA2009:009 2009/04/01 IDA DCC Erik Klimczak IDA OBN II BHZ-00,LHZ-00,VHZ-00 1900,000,00:00:00 1900,000,00:00:00 Problem Description Problem Description DEAD CHANNEL The vertical channels from the STS-1 seismometer were non-seismic from about day 2009,082-2010 to 2009,083-0828 due to a damaged circuit board in the DAS. END **************************************************************************** DATA PROBLEM REPORT IDA2009:007 2009/04/01 IDA DCC Erik Klimczak IDA MSVF II EN*00 2009,082,00:00:00 2009,082,00:00:00 Problem Description DEAD CHANNEL The triggered channels from the Episensor strong motion sensor are non-seismic for reasons yet to be determined. END PROBLEM RESOLUTION REPORT IDA2009:007 2011/02/18 IDA Erik Klimczak Description of Problem Resolution RESOLUTION The triggered channels from the Episensor strong motion sensor were restored on day 2010,205 after an IDA enginneer visited the station and re-installed the Episensor. END **************************************************************************** DATA PROBLEM REPORT IDA2009:008 2009/04/01 IDA DCC Erik Klimczak IDA PALK II *** 2009,081,00:00:00 2009,088,00:00:00 Problem Description OTHER IDA station PALK was down from about day 2009,081 to 2009,088 due to problems with communication between the DAS and the ISP. END **************************************************************************** DATA PROBLEM REPORT IDA2009:005 2009/03/04 IDA DCC Erik Klimczak IDA KWAJ II *** 2009,049,00:00:00 2009,057,00:00:00 Problem Description OTHER IDA station KWAJ was down from about day 2009,049 to 2009,057 due to power problems. Data acquisition resumed after the station operator reset the power inverter. END **************************************************************************** DATA PROBLEM REPORT IDA2009:006 2009/03/13 IDA DCC Erik Klimczak IDA PALK II *** 2009,039,00:00:00 2009,071,00:00:00 Problem Description OTHER IDA station PALK was down from about day 2009,039 to 2009,071 due to problems with communication between the DAS and the ISP. Data acquisition was restored after the station operator reconfigured cables at the ethernet switch. END **************************************************************************** DATA PROBLEM REPORT ASL1995:040 1995/12/03 ASL DCC Tyler Storm ASL GUMO IU ?HZ, ?HN 1995,261,15:56:00 1995,272,21:43:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. Outage. The vertical, and N/S data just stop at this time, but the E/W data continues; strange problem. I haven't looked at all of the data yet, but the problem goes on for at least ten days. I see that SPYDER was able to access data during this time frame, so possibly the problem is only with the data that is written to tape. END PROBLEM RESOLUTION REPORT ASL1995:040 2002/05/27 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION For most of this outage, the Z and N/S data from GUMO were recorded to tape as flat lines. Proper waveform data return on 1995, 272, 21:43. The cause of the outage is unknown. END **************************************************************************** DATA PROBLEM REPORT ASL1995:041 1995/12/03 ASL DCC Tyler Storm ASL KMBO IU ? 1995,265,05:17:00 1995,268,13:01:00 Problem Description OTHER SEED COMMENT REFERENCE S 110 TEST DATA: Calibration, and testing in progress. Calibrations are present during this time frame. No further action will be taken. END PROBLEM RESOLUTION REPORT ASL1995:041 2003/10/03 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The calibrations at KMBO ended at 1995, 268, 13:01. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL1995:042 1995/12/03 ASL DCC Tyler Storm ASL PMG IU VHN 1995,260,00:00:00 1995,260,00:00:00 Problem Description OTHER There is some noise on VHN data with a period of nine minutes. The noise is not present on the other two components. Unless a problem is found with the sensor, no further action will be taken. END PROBLEM RESOLUTION REPORT ASL1995:042 2003/06/23 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The noise in the VHN data is part of a larger noise problem at PMG. For more information on this problem, please see ASL1997:006 END **************************************************************************** DATA PROBLEM REPORT ASL1995:043 1995/12/03 ASL DCC Tyler Storm ASL YAK IU ? 1995,260,00:00:00 1995,260,00:00:00 Problem Description OTHER There is a considerable amount of spiking and pulses on all components. I believe all of the equipment is functioning properly, the station is just in a noisy environment. Unless a problem is found, no further action will be taken. END **************************************************************************** DATA PROBLEM REPORT ASL1995:044 1995/12/03 ASL DCC Tyler Storm ASL YSS IU ? 1995,260,00:00:00 1995,260,00:00:00 Problem Description OTHER There is a considerable amount of spiking and pulses on all components. I believe all of the equipment is functioning properly, the station is just in a noisy environment. Unless a problem is found, no further action will be taken. END **************************************************************************** DATA PROBLEM REPORT ASL1995:045 1995/12/08 ASL DCC Tyler Storm ASL COR IU ? 1995,341,19:00:00 1995,341,19:00:00 Problem Description OTHER There is a large pulse on the COR data at around 19:00 UTC 19 Dec 95. The disturbance makes the data from the Kuril Island quake hard to analyze since the deflection of the pulse was quite large (especially on the vertical data). The pulse was most likely caused by somebody walking around in the vault, or a sudden pressure or temperature change. The data looks like it is back to normal now. No further action will be taken. END PROBLEM RESOLUTION REPORT ASL1995:045 2001/03/28 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION This appears to be an isolated pulse. No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT ASL1995:046 1995/12/16 ASL DCC Tyler Storm ASL GLA TS ?HZ 1995,293,19:22:00 1995,313,21:25:00 Problem Description OTHER SEED COMMENT REFERENCE C 4010 Channel is down. The vertical data at GLA is unusable from 19:22, 20 Oct 95 through the most recent data I have looked at, 31 Oct 95. Data during this time frame looks like a massive square wave. END PROBLEM RESOLUTION REPORT ASL1995:046 2001/12/07 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The vertical component of the STS1 at GLA returns to normal operation and normal data quality on 1995,313,21:25. The cause of the continuous square wave sequence is unknown. END **************************************************************************** DATA PROBLEM REPORT ASL1995:047 1995/12/16 ASL DCC Tyler Storm ASL PET IU *H* *C* 1995,244,22:50:00 1995,249,10:17:00 1995,249,10:17:00 Problem Description OTHER SEED COMMENT REFERENCE C 1840 Calibration data Calibrations are present during this time frame. No further action will be taken. END PROBLEM RESOLUTION REPORT ASL1995:047 2003/06/23 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The calibrations at PET ended at 1995, 249, 04:35. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT LDEO2000:01 2000/08/12 LAMONT-DOHERTY EARTH OBSERVATORY Jiakang Xie DMC WMQ CD BHZ SHZ 1991,001,00:00:00 1991,265,23:55:00 Problem Description OTHER (COMPRESSION FORMAT ERROR) READING DATA FROM WMQ FROM YEAR 1991 CONSISTENTLY RESULT IN DATA FORMAT ERROR -rdseed gives error message such as : !!! WARNING !!! Steim Decompression Sample Count Error at Sample: 1984 Expected 1984, found 1276 samples... Lost values will be Padded with Zeros !!! WARNING !!! Steim Decompression Sample Count Error at Sample: 3968 Expected 1984, found 1310 samples... Lost values will be Padded with Zeros !!! WARNING !!! Steim Decompression Sample Count Error at Sample: 5952 Expected 1984, found 1370 samples... Lost values will be Padded with Zeros !!! WARNING !!! Steim Decompression Sample Count Error at Sample: 7936 Expected 1984, found 1403 samples... Lost values will be Padded with Zeros !!! WARNING !!! Steim Decompression Sample Count Error at Sample: 9920 Expected 1984, found 1280 samples... Lost values will be Padded with Zeros !!! WARNING !!! Steim Decompression Sample Count Error at Sample: 11904 Expected 1984, found 1237 samples... Lost values will be Padded with Zeros !!! WARNING !!! Steim Decompression Sample Count Error at Sample: 12844 Expected 940, found 599 samples... Lost values will be Padded with Zeros Writing CD: WMQ: BHZ, 12844 samples (binary), starting 1991,222 20:24:02.4400 UT !!! WARNING !!! Steim Decompression Sample Count Error at Sample: 1984 Expected 1984, found 1367 samples... Lost values will be Padded with Zeros !!! WARNING !!! Steim Decompression Sample Count Error at Sample: 3968 Expected 1984, found 1269 samples... Lost values will be Padded with Zeros !!! WARNING !!! Steim Decompression Sample Count Error at Sample: 5408 Expected 1440, found 887 samples... Lost values will be Padded with Zeros Writing CD: WMQ: SHZ, 5408 samples (binary), starting 1991,222 20:24:10.8700 UT !!! WARNING !!! Steim Decompression Sample Count Error at Sample: 1984 Expected 1984, found 1002 samples... Lost values will be Padded with Zeros !!! WARNING !!! Steim Decompression Sample Count Error at Sample: 3042 Expected 1058, found 626 samples... Lost values will be Padded with Zeros Writing CD: WMQ: SHZ, 3042 samples (binary), starting 1991,222 20:38:41.2200 UT END **************************************************************************** DATA PROBLEM REPORT LDEO2000:02 2000/10/10 LAMONT-DOHERTY EARTH OBSERVATORY Jiakang Xie DMC WMQ CD BHZ SHZ 1989.292.09.40 1989,292,10:40:00 1989,292,10:40:00 Problem Description OTHER (GAIN ERROR) INSTRUMENT-CORRECTED AMPLITUDE SPECTRA FROM CHANNEL SHZ AND BHZ DO NOT MATCH They appear to be a factor of 3-4 off, at frequencies below about 2-3 hz, after deconvolving the instrument response and looking at the Lg, Pg and Pn phases of the event on this day. This problem seems to have started much earlier for this station (the earliest time I observe such kind of problem is for day 319, 1987). END **************************************************************************** DATA PROBLEM REPORT ASL1995:026 1995/10/26 ASL DCC Tyler Storm ASL KIEV IU BHZ LHZ VHZ UHZ 1995,177,12:39:00 1996,035,03:08:00 Problem Description OTHER SEED COMMENT REFERENCE C 4520 Channel has occasional spiking. There are a considerable amount of pulses (positive, and negative) on the vertical data at KIEV. END PROBLEM RESOLUTION REPORT ASL1995:026 2006/01/05 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The spiking on the STS1 Z component at KIEV appears to have ceased by 1996, 035, 03:08. END **************************************************************************** DATA PROBLEM REPORT ASL1995:027 1995/10/26 ASL DCC Tyler Storm ASL USC TS ?HZ 1995,221,00:00:00 1995,221,00:00:00 Problem Description OTHER The offset of the vertical data at USC changes at very specific times during the day. For instance, at 02:36 the offset moves negative several hundred counts, and at 05:45 the offset returns to normal. Also, a similar type glitch occurs at 13:00 (all times are UTC). The problem does not appear to be temperature related; it happens too fast. END **************************************************************************** DATA PROBLEM REPORT ASL1995:029 1995/12/03 ASL DCC Tyler Storm ASL WMQ IC ? 1995,267,00:00:00 1995,269,00:00:00 Problem Description OTHER Calibrations are present during this time frame. No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT ASL1995:020 1995/08/15 ASL DCC Tyler Storm ASL SJG IU BHE,LHE,VHE,UHE 1995,225,03:26:39 1995,237,15:34:00 1995,237,15:34:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The mass of the E/W seismometer at SJG "pegged" positive at 03:26:39 UTC on 13 Aug 95. END PROBLEM RESOLUTION REPORT ASL1995:020 1995/08/28 ASL Tyler Storm Description of Problem Resolution Resolution SJG E/W data is back to normal as of 27 Aug 95. END **************************************************************************** DATA PROBLEM REPORT ASL1995:021 1995/10/18 ASL DCC Tyler Storm ASL ADK IU ? 1995,236,00:00:00 1995,237,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE S 110 TEST DATA: Calibration, and testing in progress. Much of the data is unusable during this time frame due to calibrations. No resolution report is needed. END PROBLEM RESOLUTION REPORT ASL1995:021 2000/06/06 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Calibrations at ADK ended 1995,237. END **************************************************************************** DATA PROBLEM REPORT ASL1995:022 1995/10/18 ASL DCC Tyler Storm ASL SPA IU BHZ, LHZ, VHZ, UHZ 1995,234,20:00:00 1995,240,04:00:00 Problem Description OTHER SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. Due to a heater failure, the offset of the vertical data at SPA was very unstable during this time frame. I have not analyzed all of the data yet, but I would not be surprised if the mass is actually "pegged" during some portion of this time frame. END PROBLEM RESOLUTION REPORT ASL1995:022 2001/09/03 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The temperature was stabilized, and the vertical data is back to normal as of 28 Aug 95. END **************************************************************************** DATA PROBLEM REPORT ASL1995:023 1995/10/19 ASL DCC Tyler Storm ASL PAB IU ?H? 1995,186,00:00:00 1999,052,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE C 4510 Channel has frequent spiking. PAB data has a considerable amount of spiking on all of the broad-band channels. Some spiking is positive only, some is negative only, and some of the spiking deflects positive and negative. The spiking does not occur at the same time on the different components. END PROBLEM RESOLUTION REPORT ASL1995:023 2000/01/27 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION The bell jars containing the STS-1 sonsors had lost vacuum and taken on moisture. It appears the moisture in the electronics was causing the excessive spiking. The instruments have been "dried out" and the bell jars have been sealed. END **************************************************************************** DATA PROBLEM REPORT ASL1995:024 1995/10/20 ASL DCC Tyler Storm ASL LBTB GT ?HN ?HE 1995,243,07:47:00 1995,256,15:20:00 1995,256,15:20:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4630 Response may be invalid. Spiking on the broad-band N/S channels. Between the groups of spikes/ glitches, the data looks dead. END PROBLEM RESOLUTION REPORT ASL1995:024 2006/06/20 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Both the N/S and E/W channels of the LBTB 54000 were intermittantly losing a substantial portion of their double-ended output. The problem appears to end at 1995, 256, 15:20. END **************************************************************************** DATA PROBLEM REPORT ASL1995:025 1995/10/26 ASL DCC Tyler Storm ASL ENH CD ? 1992,276,07:14:00 1997,263,00:00:00 Problem Description DIGITIZER PROBLEM SEED COMMENT REFERENCE S 1200 Problems with station recorder. There are occasionally huge spikes/glitches on the vertical data, and several dropouts on all of the channels. Sometimes there also are large spikes on all three channels. Most of the problems at ENH are due to the old equipment which will not be replaced, or repaired. ENH is scheduled to be upgraded to an IRIS type system spring/summer time frame of 96. No resolution report is needed. END PROBLEM RESOLUTION REPORT ASL1995:025 2001/07/19 ASL Valerie Peyton Description of Problem Resolution SUPPLEMENT ENH was upgraded to an IRIS type station on 1997,263 which fixed all of the various digitizer problems which had been occurring. END **************************************************************************** DATA PROBLEM REPORT ASL1995:037 1995/12/03 ASL DCC Tyler Storm ASL BJT IC BHZ LHZ UHZ VHZ 1995,138,03:27:00 1995,306,02:04:00 1995,306,02:04:00 Problem Description OTHER SEED COMMENT REFERENCE C 1850 Sensor has lost vacuum containment. The bell jar containing the vertical instrument at BJT lost vacuum at 03:27 on 18 May 95. The data is still usable after this time, but the noise level is approximately eight times higher than before. END PROBLEM RESOLUTION REPORT ASL1995:037 1995/12/09 ASL Tyler Storm Description of Problem Resolution Resolution Vacuum was restored at 02:40 UTC, 2 Nov 95. END **************************************************************************** DATA PROBLEM REPORT ASL1995:038 1995/12/03 ASL DCC Tyler Storm ASL BAR TS *H* 1995,065,20:00:00 1997,042,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE C 4400 Channel data quality is very poor. Terrible spiking/glitches on all channels; data seems unusable for the most part. The vertical channel has some quiet periods, but the horizontal channels are degraded throughout this time period. No further action will be taken END PROBLEM RESOLUTION REPORT ASL1995:038 2000/06/15 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The data quality is not at all improved by 1997,042. However, at this point we ceased distributing the data and are therefore not able to comment on the quality of the data after this point in time. END **************************************************************************** DATA PROBLEM REPORT ASL1995:039 1995/12/03 ASL DCC Tyler Storm ASL RPV TS ?HN, ?HE 1995,260,00:00:00 1995,260,00:00:00 Problem Description OTHER Noise levels on the horizontal data are very high. No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT IDA2001:013 2001/09/17 IDA DCC Peter Davis IDA FFC II BHZ,LHZ,VHZ 2001,210,00:00:00 2001,210,00:00:00 Problem Description LOW FREQUENCY NOISE The STS1-V at this station apparently lost vacuum containment on the above date. The operator restored the vacuum and recentered the mass on 2001,237. When he returned to check on 2001,249, the vacuum had not held. He re-greased the seal, restored the vacuum and recentered the masses again. END PROBLEM RESOLUTION REPORT IDA2001:013 2002/01/28 IDA Peter Davis Description of Problem Resolution RESOLUTION The vacuum held when restored on 2001,249, and the noise level of the seismometer returned to normal. END **************************************************************************** DATA PROBLEM REPORT ASL1995:030 1995/12/03 ASL DCC Tyler Storm ASL HKT IU ?HE, 00/*HE 1995,192,00:00:00 1995,192,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE C 4500 Channel has high noise background. The noise level on the E/W data is considerably higher than the vertical, or N/S data. Unless a problem is found with the sensor, no further action will be taken. END PROBLEM RESOLUTION REPORT ASL1995:030 2000/08/25 ASL DCC Valerie Peyton Description of Problem Resolution COMMENT The vault at HKT is located in a salt mine. Consequently, the pier is subject to tilting on a regular basis. The E component is located at one end of the pier and is most sensitive to the tilting. The station operator is aware of the problem and checks the sensor on a regular basis to keep it centered. END **************************************************************************** DATA PROBLEM REPORT IDA2001:012 2001/09/17 IDA DCC Peter Davis IDA MBAR II S** 2001,190,17:00:00 2001,190,17:00:00 Problem Description DEAD CHANNEL All components of the CMG-3T are currently non-seismic. The source of the problem is believed to be the sensor's power supply. This problem will be examined on a routine maintenance visit at the end of this month. END PROBLEM RESOLUTION REPORT IDA2001:012 2002/01/28 IDA Peter Davis Description of Problem Resolution RESOLUTION The CMG-3T sensor was removed from the borehole and the posthole package, examined and cleaned. After recentering the masses, the sensor was found to function well on the surface, so the field team reinstalled the sensor in the original posthole. Acceptable data began to be collected on 2001,288-12:00. END **************************************************************************** DATA PROBLEM REPORT ASL1995:031 1995/12/03 ASL DCC Tyler Storm ASL TIXI IU *HZ, *HN, *HE, *C* 1995,227,00:00:00 1995,228,01:00:00 Problem Description OTHER SEED COMMENT REFERENCE C 1840 Calibration data Calibrations are present during this time frame. No further action will be taken. END PROBLEM RESOLUTION REPORT ASL1995:031 2003/05/27 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The TIXI STS1 sensors were calibrated from 1995, 227, 00:00 to 1995, 227, 10:15. The TIXI S13 sensors were calibrated from 1995, 227, 23:59 to 1995, 228, 01:00. The calibration sequences at TIXI ended at 1995, 228, 01:00. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT IDA2001:015 2001/09/18 IDA DCC Peter Davis IDA PFO II BHN,BHE,LHN,LHE,VHN,VHE 2001,248,02:20:00 2001,260,00:00:00 Problem Description LOW FREQUENCY NOISE A lightning storm at the station damaged the anti-aliasing filter unit and later led to failure of the broadband north-south RT303 A2D board in the DAS. Both were repaired on a visit to the station on 2001,260. END **************************************************************************** DATA PROBLEM REPORT ASL1995:032 1995/12/03 ASL DCC Tyler Storm ASL LZH CD VH? 1986,151,00:00:00 2000,245,08:00:00 Problem Description DATA GLITCHES SEED COMMENT REFERENCE C 4521 Channel displays regular pulsing. The vertical data at LZH contains many glitches and spikes between 22:00 and 12:00 utc the following day (every day). I would assume because of the very definite pattern, the disturbance is due to cultural noise. No further action will be taken. END PROBLEM RESOLUTION REPORT ASL1995:032 2007/01/17 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION All three streams of VH-sample rate data from the KS36000I at LZH had the same random spiking problem. It likely either was cultural noise, borehole noise, or instrument noise. Regardless, it was present for the entire time the station operated. This noise was not visible at any other sample rate, as its period was too long. END **************************************************************************** DATA PROBLEM REPORT IDA2001:014 2001/09/18 IDA DCC Peter Davis IDA PFO II LGZ,LGN,LGE 2001,241,19:40:00 2001,241,19:40:00 Problem Description DEAD CHANNEL The channels from the FBA-23 are dead from this date. END PROBLEM RESOLUTION REPORT IDA2001:014 2002/01/28 IDA Peter Davis Description of Problem Resolution RESOLUTION All FBA channels are recording as of 2002,007-21:00. The EG* channels were recording correctly throughout in triggered mode. The problem existed on for the LG* channels. END **************************************************************************** DATA PROBLEM REPORT ASL1995:033 1995/12/03 ASL DCC Tyler Storm ASL QIZ CD ? 1995,252,00:00:00 1995,252,00:00:00 Problem Description DATA GLITCHES Data contains many glitches and spikes which are most likely caused by either the aging equipment or the poor power supply. No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT ASL1995:034 1995/12/03 ASL DCC Tyler Storm ASL HNR IU ? 00/? 1993,295,00:00:00 1993,295,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE S 800 Station located in high noise background area. Station is very noisy in general. The noise is most likely due to the location. No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT ASL1995:035 1995/12/03 ASL DCC Tyler Storm ASL HNR IU ?HE 1995,024,20:00:00 1998,105,21:44:00 Problem Description OTHER SEED COMMENT REFERENCE C 4510 Channel has frequent spiking. The E/W data at HNR contains many negative spikes. Unless a problem is found, no further action will be taken. END PROBLEM RESOLUTION REPORT ASL1995:035 2001/12/04 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The spiking on the E/W component of the KS54000 at HNR appeared out of nowhere, and went back there about 3.5 years later. We do not know what caused the spikes to begin appearing, or what caused them to stop. Bottom line is that the spikes are gone and data quality returns to normal as of 1998,105,21:44. END **************************************************************************** DATA PROBLEM REPORT IDA2001:011 2001/07/16 IDA DCC Peter Davis IDA TAU II *** 2001,121,21:47:00 2001,137,02:45:00 Problem Description TIMING PROBLEM The GPS clock at TAU failed briefly from 2001,109-21-47 for one day and then permanently on 2001,121-21:47. The clock and antenna were replaced on 2001,137-02:45 restoring accurate timing. END **************************************************************************** DATA PROBLEM REPORT ASL1995:036 1995/12/03 ASL DCC Tyler Storm ASL SBC TS VHZ 1995,257,00:00:00 1995,257,00:00:00 Problem Description OTHER 60 second cycling is present on this data stream. No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT IDA2001:010 2001/04/18 IDA DCC Peter Davis IDA JTS II *** 2000,177,16:27:00 2001,016,20:03:00 Problem Description DATA LOGGER PROBLEM An IDA engineer visited the station and replaced the DAS, DAT tape drive and WYSE terminal controlling the ARS to restore data acquisition. END **************************************************************************** DATA PROBLEM REPORT IDA2001:009 2001/04/18 IDA DCC Peter Davis IDA LVZ II *** 2000,165,00:00:00 2000,165,00:00:00 Problem Description INCORRECT TIME Since installation of the new MK7-ISP recording system on the above date, transmission of timing information acquired by the GPS receiver at the top of the mine to the DAS within the seismic vault deep within the mine has been very problematic. The difficulty appears to be with the RS422 devices and their unreliable operation with the long cable corrupting the timing signals and data. We are working with our colleages of the Experimental Methodological Expedition to correct the problem. The reliability of external timing will by highly variable until the problem is fixed. END **************************************************************************** DATA PROBLEM REPORT IDA2001:006 2001/04/18 IDA DCC Peter Davis IDA PFO II bh*,lh*,vh* 2001,045,17:10:00 2001,045,20:49:00 Problem Description DATA LOGGER PROBLEM An in situ DC calibration test was performed on the DAS during this period to refine the system calibration following the card replacement described in IDA2001:005. Data acquired on the channels indicated was non-seismic during this period. END **************************************************************************** DATA PROBLEM REPORT IDA2001:005 2001/04/18 IDA DCC Peter Davis IDA PFO II bhn,lhn,vhn,bhz,lhz,vhz 2001,009,07:45:00 2001,012,23:09:00 Problem Description DATA LOGGER PROBLEM Data acquisition from the north-south STS1 was lost on 2001,009. An IDA engineer visited the station on 2001,012 and swapped the ns and vertical RT303 boards to diagnose the problem causing the data outage. The DAS returned to normal operation with new RT303 cards at the end of the above period. See also IDA2001:006. END **************************************************************************** DATA PROBLEM REPORT IDA2001:008 2001/04/18 IDA DCC Peter Davis IDA PFO II bhz,lhz,vhz 2001,071,00:00:00 2001,071,00:00:00 Problem Description LOW FREQUENCY NOISE The STS1-V seismometer has become very noisy at long periods. The cause of this problem is under investigation. END PROBLEM RESOLUTION REPORT IDA2001:008 2002/01/28 IDA Peter Davis Description of Problem Resolution RESOLUTION The STS1 seismometers were reinstalled on glass base plates and sand beginning on 2001,289-21:30. The sensors were recalibrated the following day. END **************************************************************************** DATA PROBLEM REPORT IDA2001:007 2001/04/18 IDA DCC Peter Davis IDA PFO II bh*,lh*,vh* 2001,091,21:20:00 2001,097,23:14:00 Problem Description LOW FREQUENCY NOISE In order to help diagnose low frequency noise observed on the PFO data logger since mid-December 2000, the input to the above channels was short circuited during this period. The cabling was returned to normal following the conclusion of the test. END **************************************************************************** DATA PROBLEM REPORT ASL1995:004 1995/02/01 ASL DCC Tyler Storm ASL SSPA IU BHZ, LHZ, VHZ, UHZ 1994,335,00:00:00 1995,027,19:10:00 Problem Description POLARITY REVERSED SEED COMMENT REFERENCE C 4710 Channel has reversed polarity. The instrument at SSPA was installed with the vertical polarity reversed. The polarity was corrected on 27 Jan 95 at 19:10 UTC. No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT ASL1995:005 1995/02/01 ASL DCC Tyler Storm ASL LPAZ GT ? 1995,017,14:39:00 1995,020,14:52:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 555 Time is 1 minute fast. The timing at LPAZ was off by one minute from 16 Jan 95 through 20 Jan 95. No further action will be taken. END PROBLEM RESOLUTION REPORT ASL1995:005 2007/01/12 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION LPAZ timing quality returned to normal at 1995, 020, 14:52. END **************************************************************************** DATA PROBLEM REPORT ASL1995:006 1995/03/22 ASL DCC Tyler Storm ASL HIA IC BHZ, LHZ, VHZ, UHZ 1994,338,00:00:00 1995,108,06:30:00 Problem Description POLARITY REVERSED The polarity of the vertical data at HIA has been reversed since the IRIS/CDSN upgrade (4 Dec 94). END PROBLEM RESOLUTION REPORT ASL1995:006 1995/05/05 ASL Tyler Storm Description of Problem Resolution RESOLUTION The polarity of the vertical data at HIA was corrected at 06:30 UTC on 18 Apr (108) 95. This polarity reversal is documented in the IC/HIA dataless volume. END **************************************************************************** DATA PROBLEM REPORT ASL1995:007 1995/03/22 ASL DCC Tyler Storm ASL TSUM IU BHE, LHE, VHE, UHE 1994,330,07:01:00 1995,315,10:25:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. It appears that the mass is pegged in the E/W instrument at TSUM. END PROBLEM RESOLUTION REPORT ASL1995:007 2003/06/05 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The E/W component of the STS1 at TSUM was recentered at 1995, 315, 10:25. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL1995:008 1995/03/28 ASL DCC Tyler Storm ASL ANMO IU ? 1995,086,15:00:00 1995,087,17:00:00 Problem Description DEAD CHANNEL All broad-band channels from the KS54000 borehole instrument at ANMO are dead during this time frame. The downtime occurred when the seismometer was placed in another borehole. The distance moved was only a few feet; no change of location is required. No response is needed, and no further action will be taken. END **************************************************************************** DATA PROBLEM REPORT ASL1995:009 1995/03/28 ASL DCC Tyler Storm ASL ANMO IU ? 1995,080,17:16:00 1995,087,20:00:00 Problem Description INVALID RESPONSE At 17:16 UTC, 21 Mar 95, the ANMO KS36000 borehole instrument was replaced by a KS54000 borehole instrument. We expect the have the new response calculated, and distributed within a week, or so. END PROBLEM RESOLUTION REPORT ASL1995:009 2000/06/09 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The proper responses for this instrument are in the current ANMO dataless. END **************************************************************************** DATA PROBLEM REPORT IDA2001:002 2001/04/18 IDA DCC Peter Davis IDA KAPI II *** 2001,026,08:14:00 2001,053,05:15:00 Problem Description INCORRECT TIME The logic card within the GPS clock failed causing a loss of external timing information during the above period. The station continued to record data of uncertain timing throughout. An IDA engineer replaced the card on 2001,053, which restored normal timing. END **************************************************************************** DATA PROBLEM REPORT IDA2001:001 2001/04/18 IDA DCC Peter Davis IDA ABKT II EGZ,LGZ 2000,328-08:33 1900,000,00:00:00 1900,000,00:00:00 Problem Description DEAD CHANNEL The output of the veritical FBA-23 channels is dead from the above date. END PROBLEM RESOLUTION REPORT IDA2001:001 2002/07/10 IDA Peter Davis Description of Problem Resolution RESOLUTION Data acquisition from the FBA vertical channels was restored on 2002,162-05:24. END **************************************************************************** DATA PROBLEM REPORT IDA2001:004 2001/04/18 IDA DCC Peter Davis IDA SUR II *** 2001,037,00:00:00 2001,057,00:00:00 Problem Description DATA LOGGER PROBLEM An IDA engineer visited the station and replaced the RT303 card governing digitization of the east-west channels (bhe,lhe,vhe) from the STS1 seismometer and restored the DAS to normal operation. END **************************************************************************** DATA PROBLEM REPORT IDA2001:003 2001/04/18 IDA DCC Peter Davis IDA SACV II *** 2000,220,18:31:00 2001,067,03:21:00 Problem Description DATA LOGGER PROBLEM An IDA engineer visited the station on 2001,067 and replaced the RT303 cards governing digitization of the vertical and east-west channels (bhz,lhz,vhz,bhe,lhe,vhe) from the KS-54000 seismometer and restored the DAS to normal operation. The vertical RT303 board had been replaced on 2000,352 by the station operator but that action did not resolve the problems observed by DCC personnel. The symtoms of problems were lost data points at the end of packets and frequently garbled time strings within the data records themselves. These errors made processing data from the station extremely difficult. END **************************************************************************** DATA PROBLEM REPORT ASL1995:001 1995/01/03 ASL DCC Tyler Storm ASL TBT IU BHZ, LHZ, VHZ, UHZ 1994,000,361:00:00 1994,364,00:00:00 Problem Description OTHER TBT has some sort of a digitizer problem with the vertical channels. There are spikes occurring every minute on the minute, but the data between the spikes is degraded as well. END PROBLEM RESOLUTION REPORT ASL1995:001 1995/01/31 ASL Tyler Storm Description of Problem Resolution Resolution The "spiking every minute" problem, as well as a few others have been fixed at TBT as of 30 Jan 95. Massive corrosion was the culprit in this case, and not the digitizer. The technicians cleaned, and rewired the existing equipment, and brought the instruments back into tolerance. The data looks good. I have not seen enought to know if the long-period pulsing (DPR HRV1994:079) still exists. I should know in a few days. No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT ASL1995:002 1995/01/04 ASL DCC Tyler Storm ASL SNZO IU BHZ,LHZ,VHZ,UHZ,BHN,LHN,VHN,UHN 1994,282,06:43:00 1994,283,23:58:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE C 4010 Channel is down. The vertical and North/South channels at SNZO stop recording more than one day earlier than the East/West channels. No further action will be taken unless we can determine the cause of the problem. END **************************************************************************** DATA PROBLEM REPORT ASL1995:003 1995/01/06 ASL DCC Tyler Storm ASL GUMO IU BHZ,LHZ,VHZ,UHZ,BHN,LHN,VHN,UHN 1994,362,00:00:00 1994,362,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE C 4520 Channel has occasional spiking. We are seeing spiking on the vertical, and North/South channels at GUMO. The spiking seems to begin when an event causes the data amplitudes to increase. As the event coda dies down, the number of spikes also diminishes until they are no longer present. END PROBLEM RESOLUTION REPORT ASL1995:003 1995/01/07 ASL Tyler Storm Description of Problem Resolution Resolution On 7 Jan 95, the station operator reseated a couple of boards in the data processing unit and the spiking stopped. END **************************************************************************** DATA PROBLEM REPORT DMCQC2009:0022 2009/07/24 IRIS DMC Gillian Sharer DMC U20A TA ?HN 2009,162,08:02:00 2009,163,11:27:00 Problem Description LOW FREQUENCY NOISE On day 162 08:02 UTC, U20A experienced sudden-onset noise on its N channel. END PROBLEM RESOLUTION REPORT DMCQC2009:0022 2009/07/24 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The sensor was locked on day 163 00:47 and unlocked at 11:27 UTC. After this lock/unlock, the N channel resumed recording normally. END **************************************************************************** DATA PROBLEM REPORT DMCQC2009:0021 2009/07/24 IRIS DMC Gillian Sharer DMC U20A TA ?HN 2009,142,20:12:00 2009,146,21:47:00 Problem Description LOW FREQUENCY NOISE On day 142 20:12 UTC, U20A experienced sudden-onset noise on its N channel. END PROBLEM RESOLUTION REPORT DMCQC2009:0021 2009/07/24 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION U20A resumed normal recording after a lock/unlock on day 146 21:47 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2009:0020 2009/07/24 IRIS DMC Gillian Sharer DMC U28A TA ?H[EZ] 2009,130,08:00:00 2009,143,17:45:00 Problem Description LOW FREQUENCY NOISE U28A.?HZ exhibited sudden onset noise beginning approximately day 130 08:00 UTC. The noise spontaneously resolved by day 132 08:00. A sensor lock/unlock on day 132 14:40 UTC triggered similar noise on the E channel. This noise continued until the sensor was replaced on day 143 17:45 UTC. END PROBLEM RESOLUTION REPORT DMCQC2009:0020 2009/07/24 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION U28A resumed normal function when the sensor was replaced. END **************************************************************************** DATA PROBLEM REPORT DMCQC2009:0026 2009/08/04 IRIS DMC Mary Templeton DMC SRU UU EHZ 2009,215,18:00:00 2009,215,18:51:00 Problem Description OTHER The S-13 sensor at SRU clipped during the M=6.9 Gulf of California event and its first aftershock. END PROBLEM RESOLUTION REPORT DMCQC2009:0026 2009/08/04 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION The instrument resumed recording with fidelity after this time period. END **************************************************************************** DATA PROBLEM REPORT DMCQC2009:0025 2009/08/04 IRIS DMC Mary Templeton DMC TUC IU 10/?HEN 2009,215,18:02:00 2009,215,18:08:00 Problem Description OTHER The CMG-3T at TUC distorted in during the M=6.9 Gulf of California event such that it recorded little or no seismic energy on the horizontals during this time span. END PROBLEM RESOLUTION REPORT DMCQC2009:0025 2009/08/04 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION IU.TUC.10.* resumed recording with fidelity after this time. END **************************************************************************** DATA PROBLEM REPORT DMCQC2009:0024 2009/08/04 IRIS DMC Mary Templeton DMC NV31 IM BH? 2009,215,18:05:00 2009,215,18:11:00 Problem Description OTHER Amplitudes clipped at this station during the M=6.9 Gulf of California event. END PROBLEM RESOLUTION REPORT DMCQC2009:0024 2009/08/04 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION Recording resumed with fidelity after this time. END **************************************************************************** DATA PROBLEM REPORT DMCQC2009:0023 2009/07/24 IRIS DMC Gillian Sharer DMC TIN CI ?HN 2009,095,08:17:00 2009,097,19:23:00 Problem Description DEAD CHANNEL Starting on day 095 08:17 UTC, the N channel of CI.TIN went aseismic and recorded only noise. END PROBLEM RESOLUTION REPORT DMCQC2009:0023 2009/07/24 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION CI.TIN.?HN began recording seismic data again on day 097 19:23 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2009:0029 2009/08/18 IRIS DMC Peggy Johnson DMC F25A TA BH? LH? 2009,198,06:02:00 2009,212,19:00:00 Problem Description DEAD CHANNEL Starting on day 198 06:02 UTC, the masses reached the threshold, and a mass recenter sent the E and Z channels to large DC offset (1 million counts). After additional MRC attempts, all channels became aseismic. A new sensor was installed 2009.204 01:40 UTC, but the power cable was not secure and failed to send power to the sensor. The power cable was secured 2009.212 19:00 UTC. END PROBLEM RESOLUTION REPORT DMCQC2009:0029 2009/08/18 IRIS DMC Peggy Johnson Description of Problem Resolution RESOLUTION TA.F25A.?H? began recording seismic data again on day 212 19:00 UTC after the power cable was secured. END **************************************************************************** DATA PROBLEM REPORT DMCQC2009:0028 2009/08/07 IRIS DMC Gillian Sharer DMC T24A TA * 2009,214,10:29:00 2009,215,18:17:00 Problem Description DEAD CHANNEL During this time period, T24A masses were against the stops and the data is suspect. END PROBLEM RESOLUTION REPORT DMCQC2009:0028 2009/08/07 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION T24A resumed recording valid seismic data after a mass recenter on day 215 18:17 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2009:0027 2009/08/07 IRIS DMC Gillian Sharer DMC U20A TA ?HN 2009,215,12:04:00 2009,217,19:24:00 Problem Description LOW FREQUENCY NOISE On day 215 12:04 UTC, sudden-onset noise appeared on the N channel of U20A. END PROBLEM RESOLUTION REPORT DMCQC2009:0027 2009/08/07 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION A sensor lock/unlock fixed the noise problem. U20A.?HN resumed normal recording on day 217 19:24 UTC. END **************************************************************************** DATA PROBLEM REPORT ASL1995:015 1995/05/19 ASL DCC Tyler Storm ASL ANMO IU ? 1995,137,16:14:00 1995,138,16:14:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. ANMO was down from 17 May 95, 16:14 UTC through 18 May 95, 16:14 UTC in order to re-level a module within the seismometer. During this time frame the data is "flat-lined" except for the digitizer noise. A problem resolution report is not needed. END PROBLEM RESOLUTION REPORT ASL1995:015 2000/06/12 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION ANMO came back on 1995,138,16:14:00. END **************************************************************************** DATA PROBLEM REPORT ASL1995:016 1995/05/19 ASL DCC Tyler Storm ASL AAE IU ? 1995,129,00:00:00 1995,137,00:00:00 Problem Description INCORRECT TIME The timing is off approximately 7 seconds at AAE from 9 May through 16 May. From viewing the timing log, I could see that the GPS receiver was not "locked on" during this period. No further resolution is needed. END **************************************************************************** DATA PROBLEM REPORT ASL1995:017 1995/06/14 ASL DCC Tyler Storm ASL PAB IU BHZ, LHZ, VHZ, UHZ 1995,162,11:24:00 1995,165,21:13:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The vertical data from PAB is unusable. END PROBLEM RESOLUTION REPORT ASL1995:017 1995/06/15 ASL Tyler Storm Description of Problem Resolution RESOLUTION The vertical data returned to normal at 21:13:00, 14 June 95. The station operator must have found (and fixed) the problem right away. END **************************************************************************** DATA PROBLEM REPORT ASL1995:018 1995/06/21 ASL DCC Tyler Storm ASL SSPA IU ?H? 1995,166,12:16:00 1995,265,14:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The SSPA data is unusable since 12:16 on 15 Jun 95. END PROBLEM RESOLUTION REPORT ASL1995:018 1995/12/02 ASL Tyler Storm Description of Problem Resolution Comment After 26 Sept 95, there is usable data at SSPA again. However, now the E/W data is bad. This is actually a new instrument, but during the seimometer installation, the E/W module would not "level". As a result, the E/W data streams are dead. At this point, I do not know when the problem will be resolved. END **************************************************************************** DATA PROBLEM REPORT ASL1995:019 1995/07/05 ASL DCC Tyler Storm ASL LBTB GT BHZ,BHN,BHE,LHZ,LHN,LHE,VHZ,VHN,VHE 1995,177,08:54:00 1995,201,13:52:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The broad-band seismometer at LBTB has been taken off line for the drilling of a new bore hole. END PROBLEM RESOLUTION REPORT ASL1995:019 2006/06/20 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The LBTB broadband seismometer returned to operation at 1995, 201, 13:52. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL1995:010 1995/03/28 ASL DCC Tyler Storm ASL ANMO IU BHN,LHN,VHN,UHN,BHE,LHE,VHE,UHE 1995,087,17:00:00 1995,087,20:00:00 Problem Description CHANNEL ORIENTATION The broad-band horizontal channels at ANMO have unknown orientation since 17:00 UTC, 28 Mar 95. END PROBLEM RESOLUTION REPORT ASL1995:010 1995/04/19 ASL Tyler Storm Description of Problem Resolution Resolution 17:16 21 Mar 95 - 17:00 28 Mar 95. The KS36000 bore hole seismometer was replaced by a KS54000 instrument. During this time frame, the horizontal data has non-standard orientation (N/S @ 60 degrees azimuth, E/W @ 150 degrees azimuth). 17:00 28 Mar 95 - Present. The KS54000 was moved to a different bore hole next to the previous one (the distance was only a few feet, and does not merit a location change). The horizontal data has non-standard orientation in this borehole as well (N/S @ 160 degrees azimuth, E/W @ 250 degrees azimuth). END **************************************************************************** DATA PROBLEM REPORT ASL1995:011 1995/03/29 ASL DCC Tyler Storm ASL SBC TS BHN,BHE,LHN,LHE,VHN,VHE,UHN,UHE 1995,046,00:00:00 1995,087,21:10:23 Problem Description POLARITY REVERSED The broad-band horizontal data at SBC has had reversed polarity since 15 Feb 95 until the problem was resolved at 21:10:23 UTC, 28 Mar 95. END **************************************************************************** DATA PROBLEM REPORT ASL1995:012 1995/04/07 ASL DCC Tyler Storm ASL ANMO IU BHN,BHE,LHN,LHE,VHN,VHE,UHN,UHE 1995,097,20:00:00 1995,097,21:00:00 Problem Description OTHER SEED COMMENT REFERENCE C 1835 TEST DATA There are most likely some very large data spikes/glitches during this time frame. The disturbance was caused by a technician moving the masses around slightly (some sort of test). The data returned back to normal soon after the test. No problem resolution report is needed. END **************************************************************************** DATA PROBLEM REPORT ASL1995:013 1995/04/13 ASL DCC Tyler Storm ASL DPC CZ ? 1994,125,15:00:00 1994,140,14:00:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 560 Station time is exactly one hour fast. The timing at DPC is off by one hour during this time frame. For example, a P-wave time tagged at 9:30 really registered on the sensor at 8:30. Nothing can be done at this point other than to comment the data. No further action will be taken. NOTE: This DPR was originally issued under an incorrect number (ASL95:005). END PROBLEM RESOLUTION REPORT ASL1995:013 2001/04/16 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT ASL1995:014 1995/03/22 ASL DCC Tyler Storm ASL BJT IC BHZ, LHZ, VHZ, UHZ 1995,018,00:00:00 1995,081,00:00:00 Problem Description OTHER The bell jar containing the vertical instrument at BJT lost vacuum around 95, 018. The data is still usable after this time, but the noise level is approximately eight times higher than before. NOTE: This DPR was originally issued under an incorrect number (ASL1995:005). END PROBLEM RESOLUTION REPORT ASL1995:014 1995/05/12 ASL Tyler Storm Description of Problem Resolution Resolution The vacuum was restored in the bell jar containing the vertical instrument on 12 Apr. END **************************************************************************** DATA PROBLEM REPORT DMCQC2009:0011 2009/03/17 IRIS DMC Gillian Sharer DMC E04A TA * 2005,304,17:50:00 2005,341,16:44:00 Problem Description DEAD CHANNEL Masses at or near the stops. During this time period, E04A recorded no seismic energy; only noise. END PROBLEM RESOLUTION REPORT DMCQC2009:0011 2009/03/17 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION E04A resumed recording seismic data following a mass recenter on 2005, 341 16:44 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2009:0010 2009/03/17 IRIS DMC Gillian Sharer DMC I06A TA *H[NE] 2006,191,04:00:00 2006,201,23:20:00 Problem Description DEAD CHANNEL VM2, VM3 started drifting and ended up against the stops. The E and N channels did not record accurate seismic data during this time period. END PROBLEM RESOLUTION REPORT DMCQC2009:0010 2009/03/17 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION Station resumed recording seismic data following a mass recenter on 2006,201 23:20 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2009:0015 2009/05/29 IRIS DMC Mary Templeton DMC SRU UU EHZ 2009,148,08:31:00 2009,148,08:33:00 Problem Description OTHER The S-13 sensor and digitizer clipped intermittently during an Mw=7.3 Offshore Honduras event. END PROBLEM RESOLUTION REPORT DMCQC2009:0015 2009/05/29 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION UU.SRU..EHZ resumed recording with fidelity after this event. END **************************************************************************** DATA PROBLEM REPORT DMCQC2009:0014 2009/04/29 IRIS DMC Gillian Sharer DMC N08A TA ?HE 2006,047,00:23:00 2006,080,18:58:00 Problem Description DEAD CHANNEL From 2006 day 047-080, VM3 was against the stops. During this time, ?HE recorded no seismic data. END PROBLEM RESOLUTION REPORT DMCQC2009:0014 2009/04/29 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION On 2006 day 080, the sensor was re-leveled. END **************************************************************************** DATA PROBLEM REPORT DMCQC2009:0013 2009/04/29 IRIS DMC Gillian Sharer DMC L02A TA * 2005,353,01:32:00 2006,084,20:42:00 Problem Description DEAD CHANNEL During this time period, the masses at L02A were near or against the stops. The station recorded non-seismic noise only. END PROBLEM RESOLUTION REPORT DMCQC2009:0013 2009/04/29 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION On 2006 day 084, the sensor was re-leveled. END **************************************************************************** DATA PROBLEM REPORT DMCQC2009:0012 2009/04/04 IRIS DMC Gillian Sharer DMC 128A TA * 2009,078,19:45:00 2009,078,20:43:00 Problem Description DEAD CHANNEL During this time period, VM1 was against the stops. TA.128A recorded noise only. END PROBLEM RESOLUTION REPORT DMCQC2009:0012 2009/04/04 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION Following a mass recenter at 20:43 UTC, TA.128A resumed recording seismic data. END **************************************************************************** DATA PROBLEM REPORT DMCQC2009:0019 2009/07/24 IRIS DMC Gillian Sharer DMC ISA CI ?HN 2009,127,18:40:00 2009,139,23:55:00 Problem Description DEAD CHANNEL During this time period the N channel of ISA was non-seismic and/or recording digitizer noise. END PROBLEM RESOLUTION REPORT DMCQC2009:0019 2009/07/24 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION Normal seismic recording was restored on day 139 23:55 UTC after the sensor was serviced for corrosion. END **************************************************************************** DATA PROBLEM REPORT DMCQC2009:0018 2009/06/19 IRIS DMC Gillian Sharer DMC X25A TA ?HE 2009,128,21:00:00 2009,138,20:00:00 Problem Description DEAD CHANNEL During this time period, the E channel of X25A failed and recorded non-seismic noise only. END PROBLEM RESOLUTION REPORT DMCQC2009:0018 2009/06/19 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION X25A resumed normal operation after a sensor swap. END **************************************************************************** DATA PROBLEM REPORT DMCQC2009:0017 2009/06/19 IRIS DMC Gillian Sharer DMC S21A TA * 2009,110,22:08:00 2009,114,22:00:00 Problem Description DEAD CHANNEL The seismic data from S21A is unuseable during this time period due to water in the vault and subsequent pump activity. END PROBLEM RESOLUTION REPORT DMCQC2009:0017 2009/06/19 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION On day 114, the vault was mucked out and alternative drainage established. Normal seismic data recording resumed. END **************************************************************************** DATA PROBLEM REPORT DMCQC2009:0016 2009/06/08 IRIS DMC Gillian Sharer DMC V15A TA * 2007,109,20:58:00 2007,124,22:42:00 Problem Description DEAD CHANNEL From 2007 days 109-122 the mass channels at V15A would not center correctly and VM1 was against the stops. Data during this time period is highly suspect. The sensor was removed on day 122, resulting in the recording of digitizer noise. END PROBLEM RESOLUTION REPORT DMCQC2009:0016 2009/06/08 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION On day 124 V15A resumed normal seismic recording after the installation of a new sensor. END **************************************************************************** DATA PROBLEM REPORT IDA1996:009 1996/10/10 IDA DCC Peter Davis IDA TAU II *** 1996,161,00:00:00 1996,265,00:00:00 Problem Description LOW FREQUENCY NOISE LP noise rises abruptly on all three components of the STS-1 beginning on day 1996161 and diminishing by day 1996265. The apparent cause of this is believed to be a trenching operation to lay high voltage cables underground withing close proximity (200-300m) of the vault. END **************************************************************************** DATA PROBLEM REPORT IDA1996:007 1996/05/13 IDA DCC Peter Davis IDA EFI II S** 1996,092,11:49:26 1996,092,11:49:26 Problem Description DEAD CHANNEL The DC/DC converter in the vault power supply that powers the STS2 apparently failed at this time. A replacement is being shipped. We will notify when the short period channels are restored. END PROBLEM RESOLUTION REPORT IDA1996:007 1996/06/05 IDA Peter Davis Description of Problem Resolution RESOLUTION The DC/DC converter in the vault power supply was replaced on 1996152. Data streams from the STS-2 immediately returned to normal operation. END **************************************************************************** DATA PROBLEM REPORT IDA1996:008 1996/09/30 IDA DCC Peter Davis IDA ABKT II *** 1996,015,00:00:00 1996,015,00:00:00 Problem Description INCORRECT TIME The signal from the external clock at ABKT has been lost for extended periods throughout this year. When there is no mapping of external to internal time available, teleseisms are used to calculate an approximate mapping, and all such data are labeled as time uncertain in SEED channel comments. We are working with the station operator to stabilize the operation of the clock. END PROBLEM RESOLUTION REPORT IDA1996:008 1999/09/16 IDA Peter Davis Description of Problem Resolution RESOLUTION The data logger, along with a new clock, was upgraded on 1999,049. The new clock has functioned satisfactorily. END **************************************************************************** DATA PROBLEM REPORT IDA1996:005 1996/04/17 IDA DCC Peter Davis IDA NRIL II *** 1996,009,12:04:00 1996,050,05:43:00 Problem Description DATA LOGGER PROBLEM The DAT drive mounted on the data logger failed and had to be replaced. Data were not recorded during this time period. END **************************************************************************** DATA PROBLEM REPORT IDA1996:006 1996/05/09 IDA DCC Peter Davis IDA TLY II *** 1995,341,00:00:00 1995,341,00:00:00 Problem Description INCORRECT TIME The signal from the external clock was lost at TLY on 1995341 and has not be re-acquired. The problem is believed to be lie the cable assembly or the antenna. Replacement parts have been shipped. We will notify when the external clock signal is restored. END PROBLEM RESOLUTION REPORT IDA1996:006 1996/09/30 IDA Peter Davis Description of Problem Resolution RESOLUTION The GPS clock at TLY was repaired and came back into lock on 1996,191. END **************************************************************************** DATA PROBLEM REPORT IDA1996:003 1996/01/17 IDA DCC Peter Davis IDA AAK II *** 1995,001,00:00:00 1995,223,00:00:00 Problem Description INCORRECT TIME The leap second setting on the OMEGA clock was set to an incorrect value during this period. Data are precisely one second behind UT. Corrected data will be sent to the IRIS DMC shortly. END **************************************************************************** DATA PROBLEM REPORT IDA1996:004 1996/04/15 IDA DCC Peter Davis IDA FFC II *** 1996,039,22:47:00 1996,090,18:21:00 Problem Description INCORRECT TIME The Truetime 805-290 GPS clock went into an unusual but known corrupt mode at this time. The condition was cleared by consecutive reboots of the clock and data acquisition system on 1996090. These data will be archived at the DMC marked as "Time uncertain by a factor of 0-2 seconds. END **************************************************************************** DATA PROBLEM REPORT IDA1996:001 1996/01/03 IDA DCC Peter Davis IDA JTS II BH*,LH*,VH* 1995,340,00:00:00 1995,340,00:00:00 Problem Description OTHER On a maintenance visit to station JTS, it was discovered that all three STS-1 broadband seismometers were not functioning properly and could not be brought into correct adjustment. Analysis of the standard calibration test made on all site visits revealed that the instruments were too far from nominal response to be of unlimited utility at long periods. It was decided to withhold these streams until the problem can be corrected. Continuous 40 Hz data from the STS-2 co-located with the STS-1s will continue to be distributed, and all SPYDER requests will be satisfied using these data instead. We will apprise as soon as the STS-1s are repaired. END **************************************************************************** DATA PROBLEM REPORT IDA1996:002 1996/01/10 IDA DCC Peter Davis IDA MSEY II BHZ,LHZ,VHZ 1995,342,12:07:00 1995,342,12:07:00 Problem Description DATA LOGGER PROBLEM The behavior of channels BHZ,LHZ and VHZ abruptly became erratic at the time noted above and has persisted to the present. Because the data from the mass position channel VMZ continues to appear normal, the KS-54000 sensor is believed to be operating satisfactorily. Attention has centered on that part of the data logger which digitizes the signal for these channels, and several diagnostic tests are planned over the next few days to determine precisely what part needs to be replaced. We will apprise as soon as more is known or the problem is repaired. END PROBLEM RESOLUTION REPORT IDA1996:002 1996/10/10 IDA Peter Davis Description of Problem Resolution RESOLUTION The KS54000 borehole package was replaced during a site visit in August, 1996. Data flow resumed on 1996,241-04:04. END **************************************************************************** DATA PROBLEM REPORT IDA1996:010 1996/11/25 IDA DCC Peter Davis IDA WRAB II BHZ LHZ VHZ BHE LHE VHE 1996,324,02:05:00 1996,324,02:05:00 Problem Description DEAD CHANNEL Seismic data acquisition from the vertical and east-west sensors in the KS-54000 borehole package was lost during a routine maintenance visit when the procedure to lock the seismometer masses did not work correctly. The signals being received on these channels suggest that the masses of these sensors have been driven against their stops and that the feedback loops have been unable to restore them to an equilibrium position. We are working with the manufacturer to correct the problem. END PROBLEM RESOLUTION REPORT IDA1996:010 1997/03/31 IDA Peter Davis Description of Problem Resolution RESOLUTION The KS-54000 borehole package was replaced on 1997068 and began acquiring data on 1997,068-07:20. All three components of the new sensor are operating satisfactorily. END **************************************************************************** DATA PROBLEM REPORT IDA1996:011 1996/12/11 IDA DCC Peter Davis IDA KIV II *** 1996,298,19:42:00 1996,306,03:15:00 Problem Description INCORRECT TIME Judging from analysis of P-wave arrivals at KIV, there is a +20.000 second timing error in events on field tape kiv405 up to 1996306-03:15:05. We have been unable to detect precisely when this problem began, but it cannot have been before 96,298-19:42, and events after this time are well withing normal working parameters. We speculate that a pathological set of circumstances caused the OMEGA clock to jump two OMEGA frames. One OMEGA frame is 10 seconds long. END **************************************************************************** DATA PROBLEM REPORT DMCQC2009:0033 2009/10/23 IRIS DMC Gillian Sharer DMC IRM CI * 2009,264,18:56:00 2009,264,18:56:00 Problem Description DEAD CHANNEL CI.IRM stopped recording seismic data after a mass recenter on 2009 day 264 18:56 UTC. END PROBLEM RESOLUTION REPORT DMCQC2009:0033 2009/10/23 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION On 2009 day 168 18:45 UTC, the N and Z channels recovered after a lock/unlock. As of 2009 day 296, the E channel is still bad. END **************************************************************************** DATA PROBLEM REPORT DMCQC2009:0032 2009/10/23 IRIS DMC Gillian Sharer DMC T29A TA ?HZ 2009,265,05:59:00 2009,266,11:59:00 Problem Description DEAD CHANNEL During this time period, TA.T29A.?HZ recorded noise only. END PROBLEM RESOLUTION REPORT DMCQC2009:0032 2009/10/23 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION On 2009 day 266 11:59 UTC, T29A.?HZ spontaneously resumed normal operation. END **************************************************************************** DATA PROBLEM REPORT DMCQC2009:0031 2009/10/23 IRIS DMC Gillian Sharer DMC ISA CI ?H[EN] 2009,246,17:34:00 2009,258,20:10:00 Problem Description DEAD CHANNEL During this time period, the E and N channels of ISA were non-seismic. END PROBLEM RESOLUTION REPORT DMCQC2009:0031 2009/10/23 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION ISA ?H[EN] began recording seismic data again after host box repairs. END **************************************************************************** DATA PROBLEM REPORT DMCQC2009:0030 2010/02/12 IRIS DMC Gillian Sharer DMC SCZ2 CI * 2009,156,04:08:00 2009,339,18:00:00 Problem Description DEAD CHANNEL From 2009.156 04:08 UTC, SCZ2 was nonseismic and recorded noise only. END PROBLEM RESOLUTION REPORT DMCQC2009:0030 2014/07/03 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION SCZ2 began recording seismic data again on 2009.338 ~18:00 UTC after the sensor was replaced. END **************************************************************************** DATA PROBLEM REPORT DMCQC2009:0037 2009/10/23 IRIS DMC Gillian Sharer DMC VES CI ?HE 2009,255,21:37:00 2009,286,10:32:00 Problem Description OTHER On 2009 day 255 21:37 UTC, the DC offset of CI.VES.?HE suddenly dropped to -33000 counts. Sensor output is suspect during this time period. END PROBLEM RESOLUTION REPORT DMCQC2009:0037 2009/10/23 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION On 2009 day 286 10:32 UTC, the E channel spontaneously recovered to normal DC offset levels. END **************************************************************************** DATA PROBLEM REPORT DMCQC2009:0036 2009/10/23 IRIS DMC Gillian Sharer DMC 222A TA ?HN 2009,232,00:00:00 2009,279,00:20:00 Problem Description OTHER Around 2009 day 232, pings on TA.222A.?HN became excessive. END PROBLEM RESOLUTION REPORT DMCQC2009:0036 2009/10/23 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The pings stopped on 2009 day 279 00:20 UTC when the sensor was replaced. END **************************************************************************** DATA PROBLEM REPORT DMCQC2009:0035 2009/10/23 IRIS DMC Gillian Sharer DMC 229A TA * 2009,260,09:32:00 2009,275,21:12:00 Problem Description DEAD CHANNEL During this time period, TA.229A recorded digitizer noise only. END PROBLEM RESOLUTION REPORT DMCQC2009:0035 2009/10/23 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION TA.229A resumed normal operation after the battery was replaced on 2009 day 275 21:12 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2009:0034 2009/10/23 IRIS DMC Gillian Sharer DMC X30A TA ?HE 2009,071,00:00:00 2009,276,15:55:00 Problem Description HIGH FREQUENCY NOISE During this time period, the E channel of TA.X30A has 5 Hz noise not seen on the other channels. END PROBLEM RESOLUTION REPORT DMCQC2009:0034 2009/10/23 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The 5 Hz noise disappeared after a sensor swap on 2009 day 276 15:55 UTC. END **************************************************************************** DATA PROBLEM REPORT ASL1999:001 1999/01/23 ASL DCC Tyler Storm ASL MAKZ IU ? 1998,208,06:55:00 1998,237,19:10:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 450 Time Uncertain. Timing is in question. Mid day 98,235 I see a data reversal (two data streams occupying the same time domain). Since I cannot determine which data are timed correctly the entire span is questionable. END PROBLEM RESOLUTION REPORT ASL1999:001 2000/09/13 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The clock at MAKZ was unlocked from 1998,208,06:55 to 1998,237,19:10 (we can tell this from clock quality information in the SEED headers). Plotting predicted arrival times over the data for this time span, timing looks fine. It looks like the station's internal clock kept good time while unlocked from the GPS signal, but even so we cannot guarantee the accuracy of timing for this time period. END **************************************************************************** DATA PROBLEM REPORT ASL1999:000 1999/01/20 ASL DCC George Slad ASL SPA IU * 1998,316,20:00:00 1998,327,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE S 110 TEST DATA: Calibration, and testing in progress. Data unusuable due to seismometer, configuration, and software testing during this time period. END PROBLEM RESOLUTION REPORT ASL1999:000 2001/08/31 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Field engineers finished their testing and upgrading at SPA and left the station in operational order on 1998,327. END **************************************************************************** DATA PROBLEM REPORT ASL1999:003 1999/01/23 ASL DCC Tyler Storm ASL RAIO IU BHN, LHN, VHN, UHN 1998,304,00:00:00 1998,328,00:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. N/S channels are dead during this time frame. END **************************************************************************** DATA PROBLEM REPORT ASL1999:002 1999/01/23 ASL DCC Tyler Storm ASL XAN IC SHZ, SHN, SHE, HHZ, HHN, HHE 1998,287,01:11:00 1999,181,08:10:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. All channels from the STS-2 instrument are dead. END PROBLEM RESOLUTION REPORT ASL1999:002 1999/09/07 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION Instrument has been replaced. END **************************************************************************** DATA PROBLEM REPORT ASL1999:005 1999/01/23 ASL DCC Tyler Storm ASL YSS IU SHE, EHE 1998,322,00:00:00 1998,322,00:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. E/W channels from the GS-13 short-period instrument are dead. END **************************************************************************** DATA PROBLEM REPORT ASL1999:004 1999/01/23 ASL DCC Tyler Storm ASL RAIO IU BHE, LHE, VHE, UHE 1998,304,00:00:00 1998,304,00:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. E/W channels are dead during this time frame. END **************************************************************************** DATA PROBLEM REPORT ASL1999:007 1999/01/23 ASL DCC Tyler Storm ASL BILL IU BHN, LHN, VHN, UHN 1998,300,15:00:00 1998,302,20:30:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. From 1998,300,15:00 to 1998,301,22:00 the instrument mass is moving toward the stop and data are somewhat degraded. From 1998,301,22:00 to 1998,302,20:30 the mass is pegged against the stop and data are unusabe. END PROBLEM RESOLUTION REPORT ASL1999:007 2000/06/20 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The N mass of the STS-1 at BILL was centered on 1998,302. END **************************************************************************** DATA PROBLEM REPORT ASL1999:006 1999/01/23 ASL DCC Tyler Storm ASL KIP IU ? 1998,276,19:22:00 1998,295,21:13:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 440 Clock Unlocked. System clock is unlocked from timing standard; timing is in question. Due to a 12 second data overlap when the timing standard was re-acquired, it would appear the internal oscillator drifted 12 seconds over this three day period. END PROBLEM RESOLUTION REPORT ASL1999:006 2005/11/16 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The KIP clock recovered and timing quality returned to normal at 1998, 295, 21:13. END **************************************************************************** DATA PROBLEM REPORT UW2000:001 2000/02/15 University of Washington Ken Creager SPYDER CTAO IU BHZ 2000,015,00:00:00 2000,186,12:03:49 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 770 Clock is Unlocked. P wave for the deep SPYDER event in the Marianas at 2000,045,02:05:00 is about 25 s late (see BHZ record section using WILBER). 2000,181,03:10:00 -- GPS temporarily came up; it went back down again at 2000,182,02:30. END PROBLEM RESOLUTION REPORT UW2000:001 2000/02/15 ASL DCC Tyler Storm Description of Problem Resolution COMMENT The cable connecting the GPS antenna to the system was severed when a mine shaft collapsed. Timing has been in error since 2000,015. We have sent a new cable to the station. SUPPLEMENT The severed cable has been replaced, as have been all other parts damaged by the mine shaft collapse. GPS timing resumed on 2000,186,12:03:49. END **************************************************************************** DATA PROBLEM REPORT ASL1999:010 1999/03/11 ASL DCC Tyler ASL DAV IU BHE, LHE, VHE, UHE, 00/*HE 1998,245,11:00:00 2001,001,06:58:00 Problem Description OTHER SEED COMMENT REFERENCE C 4400 Channel data quality is very poor. The E/W STS-1 is "way out of tune". The response appears to be very inaccurate. I consider the instrument to be inoperative. For some time the E/W data had been very noisy due to a moisture problem (we think) in the electronics. Most likely the current problem was caused by this corrosion over the years. Currently, we can't go to this station because of political problems so it is unclear when the instrument will get fixed. END PROBLEM RESOLUTION REPORT ASL1999:010 2001/04/05 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The response of the E/W STS-1 component at DAV returns to normal early in the day on 2001,001. From the data it appears that no specific action was taken, although the response comes back at the onset of a magnitude 7.5 event. We have not determined either what caused the response of the instrument to go bad, or what made it return to normal. END **************************************************************************** DATA PROBLEM REPORT NEICQC2007:254:II.TAU 2007/09/11 NEIC Dan McNamara DMC TAU II 10.BHZ 2007,236,00:00:00 2007,254,00:00:00 Problem Description INVALID RESPONSE Hello, It appears that the response for II.TAU.10.BHZ is incorrect. The psds are rotated in a clockwise direction suggesting that the units are wrong.probably displacement instead of velocity which can be fixed by adding a zero to the response. ftp://hazards.cr.usgs.gov/web/mcnamara/NEIC/PDFs/II.TAU/II.TAU.10.BHZ.ALL.png END **************************************************************************** DATA PROBLEM REPORT ASL1999:012 1999/03/11 ASL DCC Tyler ASL SPA IU ?H? 1998,316,00:00:00 1998,316,00:00:00 Problem Description INVALID RESPONSE Most of the broad-band data at SPA have had an incorrect response since the last software upgrade in November 98. We usually set up the LH channels to have a 4x gain step from the BH channels. We mistakenly did not set up these SPA channels with the 4x gain step but we did create the data SEED volume as if the gain steps were present. We have corrected the problem in the station configuration file. This change will "take hold" once the operator resets the system at the next tape change. We are currently correcting the dataless SEED volume to accurately describe era where the gain is off. END PROBLEM RESOLUTION REPORT ASL1999:012 1999/04/05 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION The the 4x gain step is now in place after a system reset on 1 Apr 99. END **************************************************************************** DATA PROBLEM REPORT ASL1999:011 1999/03/11 ASL DCC Tyler ASL SFJ IU BHZ, LHZ, VHZ, UHZ 1999,035,12:30:00 1999,049,11:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The vertical channels were dead while the mass was pegged. Mass was centered on 8 Feb at 11:00. END **************************************************************************** DATA PROBLEM REPORT UW2000:002 2000/02/15 University of Washington Ken Creager SPYDER CPUP GT ? 1999,270,00:00:00 2000,041,21:00:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 770 Clock is Unlocked. P wave at CPUP appears about 2 minutes late for SPYDER event on 2000/01/08, 11:59 in Northern Chile (see WILBER/SPYDER record section plot for BHZ). Clock appears to be off by several minutes for 1999/12/30 14:49 Argentina (SPYDER) event. END PROBLEM RESOLUTION REPORT UW2000:002 2000/02/16 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION Station timing is unreliable from 1999,305 - 2000,041 END **************************************************************************** DATA PROBLEM REPORT ASL1999:014 1999/03/24 ASL DCC Tyler Storm ASL SFJ IU ? 1998,040,00:00:00 1998,070,00:00:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 440 Clock Unlocked. Timing is unreliable during this time frame. END **************************************************************************** DATA PROBLEM REPORT ASL1999:013 1999/03/24 ASL DCC Tyler Storm ASL YSS IU ? 1999,050,00:00:00 1999,061,00:00:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 440 Clock Unlocked. Timing is off several seconds during this time frame. END **************************************************************************** DATA PROBLEM REPORT ASL1999:016 1999/03/25 ASL DCC Tyler Storm ASL SPA IU 00/BHN, 00/LHN, 00/VHN, 00/UHN 1999,074,02:12:00 1999,084,05:51:00 Problem Description Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. N/S data are unuseable. END PROBLEM RESOLUTION REPORT ASL1999:016 1999/03/25 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION Seismometer mass was centered on 25 Mar. END **************************************************************************** DATA PROBLEM REPORT ASL1999:015 1999/03/24 ASL DCC Tyler Storm ASL NWAO IU ? 1999,055,00:00:00 1999,069,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. Field engineer on site. Testing and calibration in progress. END PROBLEM RESOLUTION REPORT ASL1999:015 2001/09/24 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The field engineer left NWAO in working order late in the day on 1999,068. Tests are completed and data quality returned to normal. END **************************************************************************** DATA PROBLEM REPORT ASL1999:018 1999/03/26 ASL DCC Tyler Storm ASL SNZO IU ? 1999,014,14:00:00 1999,046,00:00:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 450 Time Uncertain. Timing is unreliable. END PROBLEM RESOLUTION REPORT ASL1999:018 2001/10/13 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Timing quality at SNZO returned to normal at the beginning of the day on 1999,046. END **************************************************************************** DATA PROBLEM REPORT ASL1999:017 1999/03/26 ASL DCC Tyler Storm ASL SNZO IU BH1, BH2, LH1, LH2, VH1, VH2, UH1, UH2 1999,014,14:00:00 1999,046,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE C 4010 Channel is down. These channels are missing. END PROBLEM RESOLUTION REPORT ASL1999:017 1999/03/26 ASL DCC Tyler Storm Description of Problem Resolution COMMENT I don't have a good explanation why the system stopped "producing" these channels, but the problem went away when we upgraded to the Y2K compliant software. END **************************************************************************** DATA PROBLEM REPORT ASL1999:009 1999/03/11 ASL DCC Tyler ASL VNDA GT ? 1999,048,20:00:00 1999,101,00:00:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 450 Time Uncertain. Timing is off by 13.2 seconds from 17 Feb 20:00 through sometime on 4 Mar when the data acquisition system was reset. However, it appears there is still a timing error of about 4 seconds since this reset on 4 Mar 99. END PROBLEM RESOLUTION REPORT ASL1999:009 2003/04/10 ASL DCC Tyler Storm Description of Problem Resolution COMMENT No further action required. END **************************************************************************** DATA PROBLEM REPORT ASL1999:008 1999/01/23 ASL DCC Tyler Storm ASL BILL IU BHZ, LHZ, VHZ, UHZ 1998,302,19:45:00 1998,305,00:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. From 1998,302,19:45 through 1998,305 data data unusable. END PROBLEM RESOLUTION REPORT ASL1999:008 2000/06/20 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The Z mass of the STS-1 at BILL was centered on 1998,305. END **************************************************************************** DATA PROBLEM REPORT ASL2010:106 2010/06/28 ASL DCC Cory Gilbert ASL KBS IU 00/?HZ 2010,176,02:04:08 2010,176,02:04:08 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The STS-1 vertical mass fell against its stops on 2010,176,02:04:08. It needs to be re-centered. END PROBLEM RESOLUTION REPORT ASL2010:106 2010/07/06 ASL DCC Cory Gilbert Description of Problem Resolution RESOLUTION The instrument was re-centered on 2010,184,04:03 END **************************************************************************** DATA PROBLEM REPORT ASL2010:107 2010/06/30 ASL DCC Cory Gilbert ASL KIP IU 10/?H? 2010,177,16:30:00 2010,177,16:30:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The STS-2 has fallen against its stops as of 2010,177,16:30. Attempts to re-center remotely have not been successful. The station operator has been contacted and asked to re-center the instrument locally. END **************************************************************************** DATA PROBLEM REPORT ASL2010:108 2010/07/02 ASL DCC Cory Gilbert ASL QIZ IC 00/?HN, 00/?HE 2010,172,00:00:00 2010,172,00:00:00 Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE C 4503 Channel has intermittant low frequency noise. The horizontal components of the STS-2 have developed a daily occurence of ringing. We have seen this issue in the past, and usually goes away on it's own. We are unsure of the cause. The ringing seems to have a period of about 260 seconds, and lasts from a few hours at a time up to 20 hours at a time. END **************************************************************************** DATA PROBLEM REPORT ASL2010:109 2010/07/02 ASL DCC Cory Gilbert ASL GUMO IU ?0/?H? 2010,170,00:00:00 2010,170,00:00:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE C 4210 Time uncertain. The clock quality at the station is bad since 2010,170. Field engineers are currently working on it. END **************************************************************************** DATA PROBLEM REPORT ASL2010:102 2010/05/25 ASL DCC Cory Gilbert ASL KIP IU 10/?HN, 10/?HE 2010,076,00:00:00 2010,076,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE C 4510 Channel has frequent spiking. The horizontal components of the STS-1 are pulsing randomly. The vertical component seems to be unaffected for the most part. The pulses are not readily visibly until the data are filtered. END **************************************************************************** DATA PROBLEM REPORT ASL2010:103 2010/05/25 ASL DCC Cory Gilbert ASL OTAV IU 00/?H1 2010,135,00:00:00 2010,135,00:00:00 Problem Description SPIKES SEED COMMENT REFERENCE C 4521 Channel displays regular pulsing. The N/S component of the STS-1 began pulsing during the last site visit. The size and period of the pulses remains quite constant, with the period being around 950 seconds. Field engineers are currently working on the problem. END **************************************************************************** DATA PROBLEM REPORT ASL2010:104 2010/05/25 ASL DCC Cory Gilbert ASL RAR IU 00/?H? 2010,068,00:00:00 2010,068,00:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 2006 Little or no data available. The 54000 was lost during the Q330 upgrade process. The instrument had to be shutdown to switch from the Q680 digitizer to the Q300. Unfortunately, it never came back. It will more than likely take the installation of a new sensor to fix the problem. END **************************************************************************** DATA PROBLEM REPORT ASL1999:021 1999/05/26 ASL DCC Tyler Storm ASL LVC IU SHN, SHE, HHN, HHE 1998,233,14:15:00 1999,354,20:26:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The horizontal channels from the Guralp CMG3-t are dead. END PROBLEM RESOLUTION REPORT ASL1999:021 2001/08/20 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The CMG3-T at LVC was recentered on 1999,354. Data quality has returned to normal. END **************************************************************************** DATA PROBLEM REPORT ASL2010:105 2010/06/04 ASL DCC Cory Gilbert ASL PASC CI 00/?HN 2010,103,00:00:00 2010,103,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE C 4521 Channel displays regular pulsing. This instrument has been pulsing on the ?HN component for a little over a week now. There seems to be a period of about 1.3 hours on the pulses. NOTE: this is a correction for the last dpr because I named the channel ?H1 instead of ?HN END **************************************************************************** DATA PROBLEM REPORT ASL1999:020 1999/04/19 ASL DCC Tyler Storm ASL MA2 IU BHE 1999,063,15:47:55 1999,063,15:48:02 Problem Description OTHER There is seven seconds of completely erroneous data in the same time domain as the "good" data. We know this occurs in the data logger but we are not really sure how it happens. This problem has been referred to in earlier data problem reports as "fictitious data". END PROBLEM RESOLUTION REPORT ASL1999:020 1999/04/19 ASL DCC Tyler Storm Description of Problem Resolution COMMENT Quanterra was made aware of the software problem. I think everyone is satisfied this bug has been fixed on the latest software revision (actually it may have been fixed two revisions ago). Until all of the stations are upgraded to the newest software we should expect to this error ocasionally. END **************************************************************************** DATA PROBLEM REPORT IDA2005:017 2006/01/12 IDA DCC Erik Klimczak KAPI II *** 2005,296,00:00:00 2005,296,00:00:00 Problem Description DATA LOGGER PROBLEM IDA station KAPI is down due to problems with the DAS. END PROBLEM RESOLUTION REPORT IDA2005:017 2006/06/28 IDA Erik Klimczak Description of Problem Resolution RESOLUTION IDA station KAPI is back up as of 2006,143 (May 22) after an IDA engineer visited the station and replaced a blown fuse in the Power Supply board. Power to the station remains intermittent due to rolling power outages. This continually drains the backup batteries in the UPS on a daily basis. A new backup power system is currently being investigated. END **************************************************************************** DATA PROBLEM REPORT ASL1999:023 1999/06/01 ASL DCC Tyler Storm ASL CASY IU BHZ, LHZ, VHZ, UHZ 1998,343,00:00:00 1999,237,00:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. Channels from the STS-1 vertical are dead. END PROBLEM RESOLUTION REPORT ASL1999:023 2000/09/21 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The STS-1 Z data from CASY return to normal quality on 1999,237. END **************************************************************************** DATA PROBLEM REPORT IDA2005:016 2006/01/12 IDA DCC Erik Klimczak KAPI II BBE-00 2005,229,00:00:00 2005,229,00:00:00 Problem Description DEAD CHANNEL The East-West channels from the KS-540000 sensor are out due to a faulty circuit board in the DAS. END **************************************************************************** DATA PROBLEM REPORT ASL1999:022 1999/06/01 ASL DCC Tyler Storm ASL CASY IU SHZ, HHZ, SHN, HHN, SHE, HHE 1998,041,00:00:00 1999,237,00:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. Although the channels from the STS-2 instrument are not completely dead at this time they should be considered unusable. END PROBLEM RESOLUTION REPORT ASL1999:022 2000/09/21 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The STS-2 data from CASY return to good quality on 1999,237. END **************************************************************************** DATA PROBLEM REPORT IDA2005:019 2006/01/12 IDA DCC Erik Klimczak MBAR II BB*-00 2005,261,00:00:00 2005,261,00:00:00 Problem Description DEAD CHANNEL The broadband channels for the KS-54000 seismometer are out for reasons yet to be determined. An IDA engineer is scheduled to visit the station in January. END **************************************************************************** DATA PROBLEM REPORT ASL1999:025 1999/06/07 ASL DCC Tyler Storm ASL CCM IU ? 1999,093,15:30:00 1999,139,23:57:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 770 Clock is Unlocked. The system is no longer receiving a signal from an outside timing source. The internal oscillator is drifting at a rate of approximately .5 seconds per day. END PROBLEM RESOLUTION REPORT ASL1999:025 2000/09/25 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The clock at CCM locked back onto the GPS signal at the end of the day on 1999,139. Proper timing of the data resumes at this time. END **************************************************************************** DATA PROBLEM REPORT IDA2005:018 2006/01/12 IDA DCC Erik Klimczak KIV II *** 2005,222,00:00:00 2005,263,00:00:00 Problem Description OTHER IDA station KIV was down due to lightning strike causing damage to uplink. The station came back up after the station operator replaced the XCOM, RT432, and RT430 circuit boards in the DAS. END **************************************************************************** DATA PROBLEM REPORT ASL1999:024 1999/06/07 ASL DCC Tyler Storm ASL KONO IU 10/BHN, 10/BHE, 10/LHN, 10/LHE 1999,099,00:00:00 1999,119,00:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The horizontal channels from the CMG3-T instrument are dead. END PROBLEM RESOLUTION REPORT ASL1999:024 2005/07/05 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The KONO CMG3-T was recentered, fixing the dead horizontal channels. Data quality returns to normal at 1999, 118, 22:10. END **************************************************************************** DATA PROBLEM REPORT IDA2005:013 2006/01/12 IDA DCC Erik Klimczak CMLA II *** 2005,199,00:00:00 2005,199,00:00:00 Problem Description OTHER IDA station CMLA is down for reasons yet to be determined. A MK8 upgrade system in being prepared to replace the existing equipment. END PROBLEM RESOLUTION REPORT IDA2005:013 2006/09/08 IDA Erik Klimczak Description of Problem Resolution RESOLUTION IDA station CMLA is back up as of about day 239 after an IDA engineer upgraded the station to a MK8 system. New equipment including a CMG-3T seismometer, strong motion sensor, ISP, GPS clock, power supplies, and a Paroscientific microbarograph have been installed. END **************************************************************************** DATA PROBLEM REPORT ASL1999:027 1999/06/17 ASL DCC Tyler Storm ASL ANMO IU 10/BH?, 10/LH?, 10/HH?, 10/VH? 1999,168,00:08:00 1999,169,17:36:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. All channels from the CMG3-t are dead. END PROBLEM RESOLUTION REPORT ASL1999:027 2000/06/06 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION CMG-3T at ANMO was reset at 1999,169,17:36:00. END **************************************************************************** DATA PROBLEM REPORT IDA2005:012 2005/06/07 IDA DCC Erik Klimczak IDA MSEY II *** 2005,132,00:00:00 2005,132,00:00:00 Problem Description OTHER IDA station MSEY is down due to a burglary at the station. The Air Conditioning unit was stolen. The station operator has contacted local authorities and is assessing damages. END PROBLEM RESOLUTION REPORT IDA2005:012 2006/01/12 IDA Erik Klimczak Description of Problem Resolution RESOLUTION IDA station MSEY is back up after an IDA engineer visited the site and replaced the UPS, ISP, and CPU board in the DAS, and restored power to the station. END **************************************************************************** DATA PROBLEM REPORT ASL1999:026 1999/06/08 ASL DCC Tyler Storm ASL CCM IU BHZ,BHN,BHE,LHZ,LHN,LHE,VHZ,VHN,VHE 1999,087,06:30:00 1999,140,00:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. All channels from the STS-1s are dead. END PROBLEM RESOLUTION REPORT ASL1999:026 2000/09/25 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The STS-1 is fixed on 1999,140. The data return to normal quality at this time. END **************************************************************************** DATA PROBLEM REPORT IDA2005:015 2006/01/12 IDA DCC Erik Klimczak JTS II *** 2005,203,00:00:00 2005,234,00:00:00 Problem Description OTHER IDA station JTS was down due to problems with the digitizer. The station came back up after an IDA engineer visited the site and replaced a fuse for the power supply, and faulty circuit boards in the digitizer. END **************************************************************************** DATA PROBLEM REPORT ASL1999:029 1999/06/22 ASL DCC Tyler Storm ASL PMG IU ? 1999,110,05:35:00 1999,112,10:00:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 440 Clock Unlocked. Timing is unreliable. END PROBLEM RESOLUTION REPORT ASL1999:029 2003/06/11 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION PMG timing quality returns to normal at 1999, 112, 10:00 END **************************************************************************** DATA PROBLEM REPORT IDA2005:014 2006/01/12 IDA DCC Erik Klimczak COCO II BBZ-00,BBE-00 2005,350,00:00:00 2005,350,00:00:00 Problem Description DEAD CHANNEL The vertical channels from the KS-54000 seismometer were out due to a faulty circuit board in the DAS. The vertical channels were restored when the board from the East-West channel slot was swapped with the vertical channel slot. The East-West channels are out until a new circuit board can be shipped to the station. END **************************************************************************** DATA PROBLEM REPORT ASL1999:028 1999/06/22 ASL DCC Tyler Storm ASL DAV IU ? 1999,117,08:00:00 1999,120,00:00:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 440 Clock Unlocked. Timing is unreliable. END PROBLEM RESOLUTION REPORT ASL1999:028 2001/04/04 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The clock at DAV locked back onto the GPS timing standard at the beginning of the day on 1999,120. END **************************************************************************** DATA PROBLEM REPORT IDA2005:020 2006/01/12 IDA DCC Erik Klimczak PALK II *** 2005,255,00:00:00 2005,304,00:00:00 Problem Description OTHER The station was down due to a power problem. The station came back up after an IDA engineer visited and restored power to the station. END **************************************************************************** DATA PROBLEM REPORT ASL1999:019 1999/04/08 ASL DCC Tyler Storm ASL BILL IU ? 1999,053,08:18:00 1999,053,08:18:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 10 Station is down. Timing at BILL is at least one minute off. END PROBLEM RESOLUTION REPORT ASL1999:019 2004/06/17 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION A couple new QVI boards were installed at BILL to no effect. The full problem with the GPS system at BILL was finally resolved by moving the antenna to the roof of the apartment building above the station. It seems that between installation of the station in the basement of the building and mid-1996 some other structure began to obstruct the GPS antenna's sky view. A timing signal of sufficient strength to properly time data is once more being received as of 2004, 168, 00:21. YIPPEE:) END **************************************************************************** DATA PROBLEM REPORT IDA2005:022 2006/01/12 IDA DCC Erik Klimczak RAYN II *** 2005,339,00:00:00 2005,339,00:00:00 Problem Description DATA LOGGER PROBLEM IDA station RAYN is down due to problems with the DAS/ARS communication and the station clock. A site visit is planned. END PROBLEM RESOLUTION REPORT IDA2005:022 2006/06/28 IDA Erik Klimczak Description of Problem Resolution RESOLUTION IDA station RAYN is back up around day 023 after an IDA engineer replaced a blown fuse in the DAS, and the station's GPS clock. END **************************************************************************** DATA PROBLEM REPORT IDA2005:021 2006/01/12 IDA DCC Erik Klimczak RAYN II *** 2005,199,00:00:00 2005,249,00:00:00 Problem Description OTHER IDA station RAYN was down for this period due to power problems. Station power was restored when the station operator replaced the batteries for the solar power system. END **************************************************************************** DATA PROBLEM REPORT ASL2010:100 2010/05/04 ASL DCC Cory Gilbert ASL HNR IU 00/?H? 2010,114,00:00:00 2010,114,00:00:00 Problem Description NOISE SEED COMMENT REFERENCE C 4420 Channel data quality is fair. During the Q330 upgrade trip, the original plan was to remove the 54000 that was already in place and replace it with another, as well as replace the existing STS-2-HG with an STS-1-SG. During the trip, the original 54000 became stuck in the borehole. At this point, the best option was to re-install the original STS-2-HG as the primary instrument along with the STS-2-SG as the secondary. Based on the site conditions, a long (~200ft) cable is necessary to install the STS-2 on the pier. Because of the original scope, there was only one long cable on-site. As a result, the primary instrument (STS-2-HG) could not be installed on the pier with the other instrument. Currently it is installed close enough to the rest of the eqipment on site to cause large amount of noise. Expect a noisy primary instrument until the original 54000 can be replaced with a new instrument according to the original scope of the upgrade. END **************************************************************************** DATA PROBLEM REPORT ASL2010:101 2010/05/04 ASL DCC Cory Gilbert ASL TRQA IU 10/?HZ 2009,156,00:00:00 2009,156,00:00:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4605 Channel has low sensitivity. The vertical component of the CMG is going through intermittent periods where it is displaying half a double-ended output. There is not an obvious period, or any other indicator that triggers it. Usually it is fairly short lived, and the data comes back to normal. Multiple attempts to correct this have not been successful. This will probably require a station visit. Data quality is affected during this periods. END **************************************************************************** DATA PROBLEM REPORT ASL1999:030 1999/06/25 ASL DCC Tyler Storm ASL RCBR IU 10/HH1, 10/BH1, 10/LH1 1999,120,11:52:00 1999,125,18:57:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The ?H1 channels from the CMG3-T are dead. END PROBLEM RESOLUTION REPORT ASL1999:030 2003/05/29 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The CMT3-T-B at RCBR was recentered, which fixed the problem with the 1 component. Data quality returns to normal at 1999, 125, 18:57. END **************************************************************************** DATA PROBLEM REPORT IDA2005:009 2005/06/07 IDA DCC Erik Klimczak IDA KDAK II *** 2005,081,00:00:00 2005,099,00:00:00 Problem Description OTHER IDA station KDAK was down from day 081 to 099 due to power problems. The problem was resolved when the station operator replaced the generator powering the DAS. END **************************************************************************** DATA PROBLEM REPORT ASL1999:032 1999/06/26 ASL DCC Tyler Storm ASL MAJO IU ? 1999,110,00:00:00 1999,116,01:32:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 450 Time Uncertain. Timing is off by one minute. END PROBLEM RESOLUTION REPORT ASL1999:032 2001/11/30 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The MAJO station operator reset the station clock at on 1999,116,01:32. Clock quality returned to normal. END **************************************************************************** DATA PROBLEM REPORT ASL1999:031 1999/06/26 ASL DCC Tyler Storm ASL BTDF MS ? 1999,054,00:00:00 1999,054,00:00:00 Problem Description INCORRECT TIME Timing is off by up to 20 seconds. END PROBLEM RESOLUTION REPORT ASL1999:031 2000/08/24 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Timing at BTDF was actually fine on 1999,054. The apparent timing problem was observed when plotting predicted arrival times based on preliminary CMTs; when predicted arrival times from the revised CMTs were used, station timing was determined to be good. END **************************************************************************** DATA PROBLEM REPORT IDA2005:006 2005/03/17 IDA DCC Erik Klimczak IDA MSVF II *** 2005,005,00:00:00 2005,005,00:00:00 Problem Description OTHER IDA station MSVF is down due to problems with the main power supply. END **************************************************************************** DATA PROBLEM REPORT ASL1999:034 1999/06/28 ASL DCC Tyler Storm ASL LBTB GT BHZ, LHZ, VHZ 1999,177,03:56:00 1999,188,10:19:00 Problem Description OTHER SEED COMMENT REFERENCE C 4400 Channel data quality is very poor. The signal quality is very low during this time frame, and the amplitude is approximately one tenth of the normal value. END PROBLEM RESOLUTION REPORT ASL1999:034 2007/01/12 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The LBTB 54000 Z response problems end at 1999, 188, 10:19. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT IDA2005:005 2005/03/17 IDA DCC Erik Klimczak IDA COCO II BBN-00,BBZ-00 2005,073,00:00:00 2005,073,00:00:00 Problem Description DEAD CHANNEL The vertical and North-South channels for the KS-54000 seismometer are out due to faulty RT303 circuit boards in the DAS. END PROBLEM RESOLUTION REPORT IDA2005:005 2006/01/12 IDA Erik Klimczak Description of Problem Resolution RESOLUTION The vertical and North-South channels are back up after an IDA engineer replaced the KS-54000 seismometer. END **************************************************************************** DATA PROBLEM REPORT ASL1999:033 1999/06/26 ASL DCC Tyler Storm ASL FURI IU 10/BH?, 10/LH?, 10/HH?, SH?, HH? 1999,090,00:00:00 1999,173,00:00:00 Problem Description Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. All channels from the CMG3-T instrument are dead. END PROBLEM RESOLUTION REPORT ASL1999:033 2001/10/08 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The CMG3-T at FURI was recentered at 1999,173,08:30 UTC. Data quality returned to normal. END **************************************************************************** DATA PROBLEM REPORT IDA2005:008 2005/03/17 IDA DCC Erik Klimczak IDA SACV II *** 2005,059,00:00:00 2005,059,00:00:00 Problem Description OTHER IDA station SACV is down due to problems with the power supply. The solar batteries are depleted. END **************************************************************************** DATA PROBLEM REPORT IDA2005:007 2005/03/17 IDA DCC Erik Klimczak IDA PALK II *** 2005,050,00:00:00 2005,050,00:00:00 Problem Description DATA LOGGER PROBLEM IDA station PALK is down due to communication problems between the station processor and the DAS. END PROBLEM RESOLUTION REPORT IDA2005:007 2005/06/07 IDA Erik Klimczak Description of Problem Resolution RESOLUTION IDA station PALK back up on day 084 after the station operator replaced the XCOM board in the DAS. END **************************************************************************** DATA PROBLEM REPORT ASL1999:035 1999/07/09 ASL DCC Tyler Storm ASL CASY IU VHZ, VHN, VHE 1998,321,01:00:00 1998,321,03:00:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 450 Time Uncertain. Timing is off by one minute. END PROBLEM RESOLUTION REPORT ASL1999:035 2000/09/22 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Looking at the data, it is apparent that the system was reset. When the clock first came up for operation, it sought which minute to lock onto and eventually locked onto the wrong one. The clock was able to correct itself, so good timing is quickly established. No events are affected by the bad timing. END **************************************************************************** DATA PROBLEM REPORT ASL1999:038 1999/07/28 ASL DCC George Slad ASL PTGA IU 10/*H1 1999,156,12:30:00 1999,241,18:50:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The 1 component lost mass capture. The data is unusable. END PROBLEM RESOLUTION REPORT ASL1999:038 2001/09/25 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The CMG3-T-B at PTGA was recentered and data quality returned to normal late in day on 1999,241. END **************************************************************************** DATA PROBLEM REPORT IDA2005:001 2005/03/17 IDA DCC Erik Klimczak IDA ABKT II *** 2005,005,00:00:00 2005,005,00:00:00 Problem Description DATA LOGGER PROBLEM IDA station ABKT is down due to communication problems between the station processor and the DAS. END PROBLEM RESOLUTION REPORT IDA2005:001 2006/01/12 IDA Erik Klimczak Description of Problem Resolution RESOLUTION IDA station ABKT is back up as of 2005:111 after station operator replaced a faulty circuit board in the DAS. END **************************************************************************** DATA PROBLEM REPORT ASL1999:037 1999/07/27 ASL DCC Tyler Storm ASL WVT IU ? 1999,145,00:00:00 1999,176,00:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. All channels are dead. END **************************************************************************** DATA PROBLEM REPORT IDA2005:004 2005/03/17 IDA DCC Erik Klimczak IDA BRVK II *** 2005,050,00:00:00 2005,050,00:00:00 Problem Description DATA LOGGER PROBLEM IDA station BRVK is down due to communication problems between the station processor and the DAS. END PROBLEM RESOLUTION REPORT IDA2005:004 2005/06/07 IDA Erik Klimczak Description of Problem Resolution RESOLUTION IDA station BRVK is back up after an IDA engineer replaced the station processor, restoring communication between the station processor and the DAS. END **************************************************************************** DATA PROBLEM REPORT IDA2005:003 2005/03/17 IDA DCC Erik Klimczak IDA BFO II BBE-00 2005,010,00:00:00 2005,039,00:00:00 Problem Description DEAD CHANNEL The East-West channels for the STS-1 seismometer were out during this period due to a faulty RT303 circuit board in the DAS. The East-West channels were restored after the station operator replaced the circuit board. END **************************************************************************** DATA PROBLEM REPORT IDA2005:011 2005/06/07 IDA DCC Erik Klimczak IDA COCO II *** 2005,111,00:00:00 2005,292,00:00:00 Problem Description DATA LOGGER PROBLEM IDA station COCO is down due to problems with the DAS. The BB* channels are out due to faulty RT303 boards in the DAS. The short period channels from the STS-2 sensors are out as of day 087, for reasons yet to be determined. A station visit is planned for the end of June. END PROBLEM RESOLUTION REPORT IDA2005:011 2006/01/12 IDA Erik Klimczak Description of Problem Resolution IDA station COCO is back up as of 2005,292 after IDA engineers replaced the KS-54000 and STS-2 seismometers. END **************************************************************************** DATA PROBLEM REPORT IDA2005:010 2005/06/07 IDA DCC Erik Klimczak IDA NNA II *** 2005,080,00:00:00 2005,099,00:00:00 Problem Description DATA LOGGER PROBLEM IDA station NNA was down from day 080 to 099 due to problems with the DAS. The problem was resolved when an IDA engineer replaced a DC/DC converter for the DAS power supply. END **************************************************************************** DATA PROBLEM REPORT ASL2004:017 2004/03/02 ASL DCC Valerie Peyton ASL LSA IC 00/*HE 2001,125,12:00:00 2004,177,06:45:00 Problem Description NOISE SEED COMMENT REFERENCE C 4500 Channel has high noise background. The E/W component of the STS1 at LSA has a severe noise problem. The problem sets in quite slowly, beginning with a gradual rise in low frequency noise. Beginning at 2001, 125, 12:00, the noise problem intermittantly affects the high frequencies. After this time, noise levels are up to 30dB too high in the low frequencies, and up to 20dB too high in the high frequencies. The frequencies affected most by this problem are: 0.1 Hz and lower; and 0.6 to 2 Hz. Data should be used with caution, as this noise problem appears to be corrupting the instrument response for the affected frequencies. END PROBLEM RESOLUTION REPORT ASL2004:017 2004/06/28 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The LSA station operator replaced the broken STS1 E. The new instrument works properly and has the correct response for all frequencies. Data quality returns to normal at 2004, 177, 06:45. END **************************************************************************** DATA PROBLEM REPORT ASL2004:018 2004/03/02 ASL DCC Tyler Storm ASL DAV IU 00/?H? 2003,250,00:00:00 2003,250,00:00:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4400 Channel data quality is very poor. The instrument responses from the STS-1s at DAV are highly suspect. Data quality should be considered poor. Currently we are unable to visit this station due to travel restrictions. The best we can do is offer troubleshooting assistance to the operator and document the problem. END **************************************************************************** DATA PROBLEM REPORT ASL2004:019 2004/03/04 ASL DCC Valerie Peyton ASL LVC IU */* 2004,063,16:30:00 2004,067,18:07:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. An ASL field engineer is at LVC performing station maintenance. Expect variable data quality, tests, and calibrations. END PROBLEM RESOLUTION REPORT ASL2004:019 2004/03/08 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The ASL field engineer left LVC in excellent operating condition at 2004, 067, 18:07. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2010:124 2010/12/02 ASL DCC Tyler Storm ASL DWPF IU 10/?HZ 2010,267,00:00:00 2010,267,00:00:00 Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE C 4509 Channel has elevated low frequency noise levels. Data have pulses (first positive, then negative) just short of every hour from 00 UTC to 12 UTC daily. END **************************************************************************** DATA PROBLEM REPORT ASL1999:041 1999/07/29 ASL DCC George Slad ASL JOHN IU 10/*H2 1999,167,10:45:00 1999,197,05:42:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. location code: 10 instrument: Guralp Mass capture lost. Data unusable. END PROBLEM RESOLUTION REPORT ASL1999:041 2001/08/09 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The station operator at JOHN recentered the CMG3-T-B. Data quality returns to normal early in the day on 1999,197. END **************************************************************************** DATA PROBLEM REPORT ASL1999:040 1999/07/29 ASL DCC George Slad ASL JOHN IU 10/*HZ 1999,175,20:30:00 1999,197,05:42:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. location code: 10 instrument: Guralp CMG3-T-B Mass capture lost. Data unusable. END PROBLEM RESOLUTION REPORT ASL1999:040 2001/08/09 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The station operator at JOHN recentered the CMG3-T-B. Data quality returns to normal early in the day on 1999,197. END **************************************************************************** DATA PROBLEM REPORT ASL1999:043 1999/08/10 ASL DCC George Slad ASL BILL IU 00/*HE 1999,174,22:00:00 1999,178,21:50:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. location code 00 Mass lost capture on the east components. Data are unusable. END **************************************************************************** DATA PROBLEM REPORT ASL1999:042 1999/08/08 ASL DCC George Slad ASL SFJ IU BHZ, LHZ, VHZ, UHZ 1999,185,22:00:00 1999,221,17:20:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 1850 Sensor has lost vacuum containment. The mass position of the vertical component went to zero and was probably caused by a loss of vacuum. The data are unusable. END PROBLEM RESOLUTION REPORT ASL1999:042 1999/09/09 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION Mass has been centered and vacuum has been restored. END **************************************************************************** DATA PROBLEM REPORT ASL1999:045 1999/08/19 ASL DCC Tyler Storm ASL ANMO IU 10/?H? 1999,226,22:00:00 1999,228,21:00:00 Problem Description DEAD CHANNEL Data from the CMG3-t are unuseable. END PROBLEM RESOLUTION REPORT ASL1999:045 2000/06/09 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The CMG3-T at ANMO returned to normal working order on 1999,228,21:00:00. END **************************************************************************** DATA PROBLEM REPORT ASL2004:010 2004/02/27 ASL DCC Valerie Peyton ASL HKT IU */* 2004,016,18:00:00 2004,049,16:55:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 452 Timing IS in error, as clock is unlocked. A port on the Quanterra malfunctioned during this time period, making it impossible for the GPS system to communicate with the digitizer. All HKT data are mistimed during this time period. END PROBLEM RESOLUTION REPORT ASL2004:010 2004/02/27 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The port problem on the Quanterra digitizer was resolved at 2004, 049, 16:55. Timing quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL1999:044 1999/08/19 ASL DCC Tyler Storm ASL INCN IU 00/*HE 1999,214,02:18:00 1999,295,04:52:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. INCN STS1 E/W data are unuseable. END PROBLEM RESOLUTION REPORT ASL1999:044 2005/07/18 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The INCN STS1 E/W instrument was fixed. Data quality returns to normal at 1999, 295, 04:52. END **************************************************************************** DATA PROBLEM REPORT ASL2004:011 2004/02/27 ASL DCC Valerie Peyton ASL RCBR IU 10/*HZ 10/*H2 2004,040,18:31:00 2004,223,14:11:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The Z and 2 components of the CMG3-T-B are completely pegged during this time. Data are unuseable. END PROBLEM RESOLUTION REPORT ASL2004:011 2004/08/10 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The RCBR CMG3T-B proved unretrievable: it is stuck in the borehole and cannot be removed for repair. This borehole instrument has been replaced with an STS2 in a surface vault, effective 2004, 223, 14:11. Data quality is normal for a surface STS2, and new response epochs have been added to the IU/RCBR dataless to describe the new instrument. END **************************************************************************** DATA PROBLEM REPORT ASL1999:047 1999/08/31 ASL DCC Tyler Storm ASL SPA IU 10/?HZ 1999,231,07:00:00 1999,315,07:02:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. All channels from the CMG3-T are inoperative. END PROBLEM RESOLUTION REPORT ASL1999:047 2001/08/30 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION All three components of the CMG3-T at SPA went down at the same time. The Z component returned to normal operation on 1999,315. For information on when the N component returned to normal operation, please see ASL2000:023; for information on when the E component returned to normal operation, please see ASL2000:021. END **************************************************************************** DATA PROBLEM REPORT ASL2004:012 2004/02/27 ASL DCC Valerie Peyton ASL COR IU 00/*H* 2004,048,16:20:00 2004,055,17:40:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4625 Invalid instrument response. All three components of the STS1 at COR are behaving strangely during this time period. The instrument response is incorrect and noise levels are extraordinarily high. Data quality is severly compromised to completely useless. The problem began after some routine maintenance work was performed on the digitizer. There is a high probability that the problem lies entirely in the digitizer. END PROBLEM RESOLUTION REPORT ASL2004:012 2004/02/27 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The problem on the STS1 at COR was resolved at 2004, 055, 17:40. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL1999:046 1999/08/27 ASL DCC George Slad ASL JOHN IU 00/*H1 1999,094,02:55:00 1999,315,11:02:00 Problem Description SPIKES SEED COMMENT REFERENCE C 4450 Channel has frequent negative pulses. VH1 has spiking which occurs somewhat regularly, approximately every 1.5 - 2 hours. IRIS/USGS network operations is looking into the problmm END PROBLEM RESOLUTION REPORT ASL1999:046 2001/08/10 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The spiking apparently is gone as of nearly midday on 1999,315. The amplitude of the spiking starts small, grows, and then falls off below the background noise level. END **************************************************************************** DATA PROBLEM REPORT ASL2004:013 2004/02/27 ASL DCC Valerie Peyton ASL FUNA IU */* 2004,021,20:24:00 2004,040,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE S 110 TEST DATA: Calibration, and testing in progress. An ASL field team was on location at FUNA installing the station. Expect highly variable data quality, as well as calibrations and other tests during this time period. END PROBLEM RESOLUTION REPORT ASL2004:013 2004/02/27 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The ASL field team left FUNA fully installed and in fantastic operating condition on 2004, 040. END **************************************************************************** DATA PROBLEM REPORT ASL1999:049 1999/09/03 ASL DCC George Slad ASL XAN IC VHZ, UHZ, BHZ, LHZ 1999,178,00:00:00 1999,178,00:00:00 Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE C 4410 Channel data quality is poor. location code:00 Long period noise seen on vertical component of STS1. Mass position appears normal. END **************************************************************************** DATA PROBLEM REPORT ASL2004:014 2004/02/27 ASL DCC Valerie Peyton ASL SPA IU */* 2003,349,00:00:00 2004,007,03:43:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. An ASL field team was on site for the decommissioning of station SPA. Expect highly variable data quality and availability. END PROBLEM RESOLUTION REPORT ASL2004:014 2004/02/27 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Station SPA was officially closed at 2004, 007, 03:43. For data from the South Pole after this time, please use station IU/QSPA. END **************************************************************************** DATA PROBLEM REPORT ASL1999:048 1999/09/01 ASL DCC George Slad ASL SSE IC VHE, LHE, BHE, UHE 1999,189,00:00:00 1999,189,00:00:00 Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE C 4010 Channel is down. Large amplitude, low frequency noise follows immediately after new software installation. Data are unusable at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2004:015 2004/02/27 ASL DCC Valerie Peyton ASL MIDW IU */* 2003,350,18:00:00 2003,354,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. An ASL field engineer was on location at MIDW for station maintenance. Expect highly variable data quality, as well as calibrations and other tests during this time period. END PROBLEM RESOLUTION REPORT ASL2004:015 2004/02/27 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The ASL field engineer left MIDW in excellent operating condition on 2003, 354. END **************************************************************************** DATA PROBLEM REPORT ASL2004:016 2004/02/27 ASL DCC Valerie Peyton ASL MIDW IU 00/*H* 2003,351,03:39:00 2005,155,02:44:00 Problem Description NOISE SEED COMMENT REFERENCE C 4504 Channel exibits high levels of low frequency noise. The STS2 at MIDW is installed in a building on the surface at Midway Island. Unfortunately, this is the only structure available for the installation. In order to keep the equipment from overheating, an air conditioner runs in the building. The air conditioner produces long-period spikes on all three channels of the STS2. The frequency of the spikes varies from 2200 seconds to 800 seconds. The amplitude of the spikes is highest on the N component. END PROBLEM RESOLUTION REPORT ASL2004:016 2004/02/27 ASL DCC Valerie Peyton Description of Problem Resolution COMMENT The noise problem on the STS2 at MIDW will continue as long as we are unable to change the installation conditions. SUPPLEMENT During a maintenance visit, an ASL field engineer was able to work with MIDW staff to build a shallow surface vault for the STS2. After removing the STS2 to this surface vault, the air conditioner signature has disappeared from the data. As of 2005, 155, 02:44, lp noise levels on the MIDW STS2 are simply what one would expect from a surface instrument on a small island. END **************************************************************************** DATA PROBLEM REPORT ASL2010:120 2010/10/21 ASL DCC Cory Gilbert ASL GNI IU 00/?H2 2010,293,16:35:15 2010,293,16:35:15 Problem Description SPIKES SEED COMMENT REFERENCE C 4410 Channel data quality is poor. The STS-1 E/W is pulsing after a large spike at 2010,293,16:35:15. Long period data quality is suffering as a result. END **************************************************************************** DATA PROBLEM REPORT ASL2010:121 2010/10/21 ASL DCC Cory Gilbert ASL KMBO IU ?0/?H? 2010,291,00:00:00 2010,291,00:00:00 Problem Description NOISE SEED COMMENT REFERENCE C 4410 Channel data quality is poor. Horizontal components of both instruments have developed very coherent noise in the last several days. The vertical component of the STS-1 is also wandering. Field engineers are looking into these issues. END **************************************************************************** DATA PROBLEM REPORT ASL2010:122 2010/10/21 ASL DCC Cory Gilbert ASL GNI IU 00/?HZ 2010,293,16:42:33 2010,293,16:42:33 Problem Description SPIKES SEED COMMENT REFERENCE C 4410 Channel data quality is poor. The vertical component of the STS-1 has developed some pulsing in the last two days. The pulsing started out gradually beginning at 2010,293,16:42:33. Field engineers are looking into this. END **************************************************************************** DATA PROBLEM REPORT ASL2010:123 2010/10/26 ASL DCC Cory Gilbert ASL AFI IU 00/?H2 2010,295,14:58:51 2010,295,14:58:51 Problem Description VERY LARGE PULSE SEED COMMENT REFERENCE C 4400 Channel data quality is very poor. The STS-1's took a large pulse on 2010,295,14:58:51. The vertical and ?H1 components came back fine, but the ?H2 is now stuck in some sort of clipping free period with very high counts. Field engineers are working on this issue. END **************************************************************************** DATA PROBLEM REPORT ASL2004:006 2004/02/17 ASL DCC Tyler Storm ASL PMG IU 10/?HZ 2004,044,00:00:00 2004,050,00:20:00 Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE C 4504 Channel exibits high levels of low frequency noise. High noise levels at lower frequencies. END PROBLEM RESOLUTION REPORT ASL2004:006 2004/02/19 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION An instrument reset at 2004,050,00:20:00 fixed the problem. END **************************************************************************** DATA PROBLEM REPORT ASL2010:117 2010/09/22 ASL DCC Cory Gilbert ASL INCN IU 00/?H? 2010,228,09:09:00 2010,228,09:09:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. As of 2010,228,09:09:00 the STS-1 is down on all three components. The SIB was replaced, but this did not solve the problem completely. Field engineers are working on this issue. END **************************************************************************** DATA PROBLEM REPORT ASL2004:007 2004/02/24 ASL DCC Valerie Peyton ASL CCM IU */* 2003,339,16:39:00 2003,352,09:40:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 454 Timing MAY be in error, as GPS system is not operating consistently. The GPS system at CCM is behaving inconsistently. Timing quality and accuracy cannot be guaranteed. END PROBLEM RESOLUTION REPORT ASL2004:007 2004/02/24 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The GPS system at CCM returned to good health at 2003, 352, 09:40. Timing quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2010:118 2010/09/30 ASL DCC Cory Gilbert ASL SSE IC 00/?HE 2010,239,12:39:00 2010,239,12:39:00 Problem Description OTHER SEED COMMENT REFERENCE C 4400 Channel data quality is very poor. Beginning on approximately 2010,239,12:39 the STS-1 E/W is showing long period noise. Field engineers are currently working on this issue. END **************************************************************************** DATA PROBLEM REPORT ASL2004:008 2004/02/24 ASL DCC Valerie Peyton ASL KIEV IU */* 2003,338,09:48:00 2003,358,12:59:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 451 Timing MAY be in error, as clock is unlocked. The GPS system at KIEV appears to be unlocked from the GPS timing standard. Timing in the data may be incorrect. END PROBLEM RESOLUTION REPORT ASL2004:008 2004/04/30 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The GPS system at KIEV acheived full lock on the GPS timing standard at 2003, 358, 12:59. Data timing is once more correct as of this time. END **************************************************************************** DATA PROBLEM REPORT ASL2010:119 2010/10/14 ASL DCC Cory Gilbert ASL CTAO IU 00/?H? 2010,286,22:34:00 2010,286,22:34:00 Problem Description NOISE SEED COMMENT REFERENCE C 4400 Channel data quality is very poor. The STS-1's at CTAO show a gap in the data starting on 2010,286,22:34:00 lasting for about 6 hours. When the data comes back, there are large pulses and swings in the data. Field engineers are currently working on the problem. END **************************************************************************** DATA PROBLEM REPORT ASL1999:050 1999/09/09 ASL DCC Tyler Storm ASL SFJ IU BHN, LHN, VHN, UHN 1999,221,17:20:00 1999,229,14:27:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. Channels from the N/S STS-1 are dead. END PROBLEM RESOLUTION REPORT ASL1999:050 1999/10/01 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION Instrument mass has been centered. END **************************************************************************** DATA PROBLEM REPORT ASL2004:009 2004/02/25 ASL DCC Tyler Storm ASL WMQ IC 00/?HZ 2004,009,23:00:00 2004,071,23:00:00 Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE C 4504 Channel exibits high levels of low frequency noise. The STS-1 vertical data have low-frequency noise. END PROBLEM RESOLUTION REPORT ASL2004:009 2004/06/16 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The low-frequency noise on the STS1 Z at WMQ ends at 2004, 071, 23:00. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2010:113 2010/07/26 ASL DCC Cory Gilbert ASL TEIG IU 10/?HZ, 10/?H1 2010,179,22:31:03 2010,179,22:31:03 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4605 Channel has low sensitivity. The CMG ?HZ and ?H1 components have begun showing a half a double ended output after a pulse in the data. It stayed the same until about 2010,203 when the ?H1 component looks to have completely died. Field engineers are currently working on it. END **************************************************************************** DATA PROBLEM REPORT ASL1999:052 1999/09/10 ASL DCC George Slad ASL BDFB GT BHE, BHN, LHE, LHN, VHE, VHN 1999,079,15:30:00 1999,079,15:30:00 Problem Description SPIKES SEED COMMENT REFERENCE C 4810 Channel has transient long period signals. The horizontal components at BDFB have a periodic pulse occuring approximately every 15 to 30 min. The pulses are evident in filtered BH and LH data. The cause of these pulses is unknown. Since ASL is not responsible for this station, we will have to simply wait until AFTAC diagnoses and fixes the problem. END PROBLEM RESOLUTION REPORT ASL1999:052 2001/04/18 ASL DCC Valerie Peyton Description of Problem Resolution COMMENT The pulsing on the 54000 horizontal components is now considerably less frequent, and no longer periodic. By 2001,107, the pulses were appearing in short sequences a couple of times a day. The amplitude of the pulsing is also much reduced. END **************************************************************************** DATA PROBLEM REPORT ASL2010:114 2010/07/28 ASL DCC Cory Gilbert ASL PAYG IU 00/?H2 2010,201,04:14:11 2010,201,04:14:11 Problem Description NOISE SEED COMMENT REFERENCE C 4400 Channel data quality is very poor. On 2010,201,04:14:11 the ?H2 component of the 54000 took a large negative kick and has shown high levels of long period noise ever since. There have also been numerous large negative kicks between then and now. ASL field engineers are currently looking into the problem. END **************************************************************************** DATA PROBLEM REPORT ASL1999:051 1999/09/09 ASL DCC Tyler Storm ASL SDV IU BH?, LH?, VH?, UH? 1999,119,04:35:00 1999,310,19:29:00 Problem Description OTHER Data from the STS-1 instruments are not being written to tape. END PROBLEM RESOLUTION REPORT ASL1999:051 2004/03/16 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Data from the STS1 instruments at SDV began writing to tape again at 1999, 310, 19:29. END **************************************************************************** DATA PROBLEM REPORT ASL2010:115 2010/09/09 ASL DCC Tyler Storm ASL WAKE IU * 2010,062,00:00:00 2010,062,00:00:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 451 Timing MAY be in error, as clock is unlocked. Timing quality is in question. I cannot confirm any timing problems but the system is not receiving the GPS signal. END PROBLEM RESOLUTION REPORT ASL2010:115 2010/09/30 ASL DCC Tyler Storm Description of Problem Resolution SUPPLEMENT On day 2010,253 the timing appeared to jump at WAKE. Although the timing should be considered suspect the entire time the system did not have a timing reference I didn't actually see a problem until day 253. On this day it appeared the 10 Q330 was still good (or close) but the 00 Q330 was 4min off. update: I looked at the Indonesian quake on 29 Sept and the 10/BHZ p-time appeared to be 30 seconds early and the 00/BHZ p-time looked 3:15 late. Parts are in the mail. END **************************************************************************** DATA PROBLEM REPORT ASL1999:054 1999/10/01 ASL DCC George Slad ASL BOSA GT BH?,LH?,VH? 1999,200,00:00:00 1999,200,00:00:00 Problem Description SPIKES SEED COMMENT REFERENCE C 4510 Channel has frequent spiking. Frequenct spiking occurs for days at rates of more than once an hour. The spiking rate rate slows for several days then picks up again and is most prevelant on the horizontal components. END PROBLEM RESOLUTION REPORT ASL1999:054 2000/08/23 ASL DCC Valerie Peyton Description of Problem Resolution COMMENT Roughly 25 days after the onset of the worst spiking, the amplitude and frequency of the spikes decreased substantially. However, spiking is still intermittently present on all channels of the KS54000 at BOSA. END **************************************************************************** DATA PROBLEM REPORT ASL2010:116 2010/09/10 ASL DCC Tyler Storm ASL GRFO IU ?HE 2010,220,00:00:00 2010,220,00:00:00 Problem Description NOISE SEED COMMENT REFERENCE C 4815 Channel has long period noise. We begin to see long-period noise on the E/W channels of the KS36000 around this time. The noise appears to be getting worse (and more contant) over time. END **************************************************************************** DATA PROBLEM REPORT ASL1999:053 1999/09/10 ASL DCC George Slad ASL JOHN IU 10/*H2 1999,232,00:00:00 1999,299,02:30:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. location code = 10 The Guralp east component (2) has lost mass capture. Data are unusable. END PROBLEM RESOLUTION REPORT ASL1999:053 2001/08/09 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The station operator at JOHN recentered the CMG3-T-B. Data quality returns to normal early in the day on 1999,299. END **************************************************************************** DATA PROBLEM REPORT ASL1999:056 1999/10/01 ASL DCC George Slad ASL HNR IU * 1999,200,03:30:00 1999,217,22:35:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE S 10 Station is down. The station is inoperative during this time period. END PROBLEM RESOLUTION REPORT ASL1999:056 1999/10/01 ASL DCC George Slad Description of Problem Resolution RESOLUTION The station became operational on day 99,217. See DPR ASL99:055 regarding the vertical component. END **************************************************************************** DATA PROBLEM REPORT IDA2005:027 2006/01/12 IDA DCC Erik Klimczak WRAB II WDI-00 2005,349,00:00:00 2005,349,00:00:00 Problem Description DEAD CHANNEL The WDI-00 channel is out due to a faulty micro-barometer. END **************************************************************************** DATA PROBLEM REPORT ASL1999:055 1999/10/01 ASL DCC George Slad ASL HNR IU 00/?HZ 1999,180,02:54:00 2004,290,09:27:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The vertical component of the KS54000 is unusable. On day 198 the sensor had large fluctuations in amplitude and later settled down to -2 million counts. On day 1999 180, the Z component went dead. We don't know why, and the initial attempt to fix it failed. The instrument will be replaced at the next available opportunity. END PROBLEM RESOLUTION REPORT ASL1999:055 2004/11/26 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The 54000 at HNR was replaced during a station maintenance trip. The Z component resumes proper operation and data quality at 2004, 290, 09:27. END **************************************************************************** DATA PROBLEM REPORT ASL2004:000 2004/01/09 ASL DCC Tyler Storm ASL BILL IU 00/*HZ 2004,007,17:30:00 2004,008,01:53:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. Data are unuseable. END PROBLEM RESOLUTION REPORT ASL2004:000 2004/01/09 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION Instrument was re-centered. END **************************************************************************** DATA PROBLEM REPORT ASL1999:058 1999/10/01 ASL DCC George Slad ASL INCN IU 00/BHZ, 00/LHZ, 00/VHZ, 00/UHZ 1999,177,20:30:00 1999,182,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. location code 00 The vertical component STS-1 lost mass capture. Data are unusuable. END PROBLEM RESOLUTION REPORT ASL1999:058 1999/10/01 ASL DCC George Slad Description of Problem Resolution RESOLUTION Station operator reset seismometer. Data quality on the INCN STS1 Z component returns to normal at 1999, 182, 00:00. END **************************************************************************** DATA PROBLEM REPORT ASL2004:001 2004/01/09 ASL DCC Tyler Storm ASL MIDW IU 00/?H? 2004,009,00:27:00 2004,009,13:54:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. Data are unuseable. END PROBLEM RESOLUTION REPORT ASL2004:001 2004/01/09 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION STS-2 was reset/re-centered. END **************************************************************************** DATA PROBLEM REPORT ASL1999:057 1999/10/01 ASL DCC George Slad ASL INCN IU 00/BHZ, 00/LHZ, 00/VHZ, 00/UHZ 1999,124,17:19:00 1999,128,10:10:00 Problem Description OTHER SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. location code=00 The vertical component of the STS1 lost mass capture. Data quality is poor to unusuable. END PROBLEM RESOLUTION REPORT ASL1999:057 1999/10/01 ASL DCC George Slad Description of Problem Resolution RESOLUTION Station operators reset the seismometer. Data quality on the INCN STS1 Z component returns to normal at 1999, 128, 10:10. END **************************************************************************** DATA PROBLEM REPORT ASL2004:002 2004/01/13 ASL DCC Tyler Storm ASL CASY IU 00/?HN 2004,011,01:51:20 2004,011,01:51:20 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The mass of the N/S seismometer is against a stop. Data are unuseable. END **************************************************************************** DATA PROBLEM REPORT IDA2005:024 2006/01/12 IDA DCC Erik Klimczak SUR II *** 2005,334,00:00:00 2005,334,00:00:00 Problem Description DATA LOGGER PROBLEM IDA station SUR is out due to communication problems between the DAS and the ISP. END PROBLEM RESOLUTION REPORT IDA2005:024 2006/06/28 IDA Erik Klimczak Description of Problem Resolution RESOLUTION IDA station SUR came back up on day 032 after the station operator replaced the DAS with one shipped from UCSD. END **************************************************************************** DATA PROBLEM REPORT ASL2004:003 2004/01/20 ASL DCC Tyler Storm ASL PAS TS LLE 2003,343,21:40:00 2004,214,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE C 4605 Channel has low sensitivity. There is a sensitivity problem with the E/W component of the FBA-23. The response is around 50db too low. END PROBLEM RESOLUTION REPORT ASL2004:003 2007/01/24 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The response problem on the PAS FBA23 E component appears to have ended by 2004, 214, 00:00. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT IDA2005:023 2006/01/12 IDA DCC Erik Klimczak SHEL II BBZ-00 2005,308,00:00:00 2005,308,00:00:00 Problem Description DEAD CHANNEL The vertical channels for the KS-54000 seismometer are out for reasons yet to be determined. END PROBLEM RESOLUTION REPORT IDA2005:023 2006/06/28 IDA Erik Klimczak Description of Problem Resolution RESOLUTION The vertical channels for the KS-54000 seismometer were restored after the digitizer was remotely reset on day 115. END **************************************************************************** DATA PROBLEM REPORT ASL1999:059 1999/10/07 ASL DCC Tyler Storm ASL LBTB GT ? 1999,205,10:18:00 1999,210,22:20:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 440 Clock Unlocked. Clock is unlocked from timing standard. END PROBLEM RESOLUTION REPORT ASL1999:059 2006/06/26 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION LBTB timing returned to normal at 1999, 210, 22:20. END **************************************************************************** DATA PROBLEM REPORT ASL2004:004 2004/01/26 ASL DCC Tyler Storm ASL XAN IC * 2003,346,12:00:00 2003,358,12:00:00 Problem Description SPIKES SEED COMMENT REFERENCE C 4420 Channel data quality is fair. excessive spiking on all channels. END PROBLEM RESOLUTION REPORT ASL2004:004 2004/01/26 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION Data quality returns to normal. END **************************************************************************** DATA PROBLEM REPORT IDA2005:026 2006/01/12 IDA DCC Erik Klimczak TLY II BBZ-00,BBN-00 2005,287,00:00:00 2005,287,00:00:00 Problem Description DEAD CHANNEL The vertical and North-South channels for the STS-1 sensors are out for reasons yet to be determined. The station operator removed a faulty circuit board for the vertical channel, and the slot remains empty at this time. END PROBLEM RESOLUTION REPORT IDA2005:026 2006/06/28 IDA Erik Klimczak Description of Problem Resolution RESOLUTION All broadband channels for the STS-1 sensors were restored after the station was upgraded to IDA9 data format on day 104. END **************************************************************************** DATA PROBLEM REPORT ASL2004:005 2004/01/26 ASL DCC Tyler Storm ASL XAN IC 00/?HN 2003,346,12:00:00 2003,358,12:00:00 Problem Description SPIKES SEED COMMENT REFERENCE C 4400 Channel data quality is very poor. Although all the XAN channels show excessive spiking during this time frame the N/S STS-1 channels are considerably worse. These data are basically unuseable. END PROBLEM RESOLUTION REPORT ASL2004:005 2004/01/26 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION Data quality has returned to normal. END **************************************************************************** DATA PROBLEM REPORT IDA2005:025 2006/01/12 IDA DCC Erik Klimczak TLY II *** 2005,220,00:00:00 2005,287,00:00:00 Problem Description OTHER IDA station TLY was down during this period due to problems with the DAS following a thunderstorm. Data acquisition resumed after the station operator repaired the damaged DAS circuit boards. END **************************************************************************** DATA PROBLEM REPORT ASL2010:110 2010/07/08 ASL DCC Tyler Storm ASL WCI IU 00/* 2010,188,13:19:40 2010,188,13:19:40 Problem Description DEAD CHANNEL The STS-1 data channels are currently digitizer noise. We pulled out the STS-1 instruments on 2010,188 and brought them back to the lab for testing. Once we have verified we have a good response from these instruments we will re-install. END **************************************************************************** DATA PROBLEM REPORT ASL2010:111 2010/07/12 ASL DCC Tyler Storm ASL GUMO IU * 2010,174,00:00:00 2010,174,00:00:00 Problem Description INCORRECT TIME Timing should be considered suspect during this time frame. END **************************************************************************** DATA PROBLEM REPORT ASL2010:112 2010/07/22 ASL DCC Cory Gilbert ASL XMAS IU 00/?H? 2010,202,03:52:17 2010,202,03:52:17 Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE C 4400 Channel data quality is very poor. Beginning on 2010,202,03:52:17 the primary STS-2 is very ugly. The mass position values seem reasonable, but they do not match the trend of those of the secondary STS-2 at all. Field engineers are looking into it. END **************************************************************************** DATA PROBLEM REPORT ASL2004:039 2004/04/06 ASL DCC Valerie Peyton ASL KBS IU 10/BH* 2004,060,04:46:00 2004,092,20:11:00 Problem Description NOISE SEED COMMENT REFERENCE C 4508 Channel has high levels of high frequency noise. An intermittant high frequency noise problem starts developing on the STS2 at KBS on 2004, 060. The frequencies most affected are 1Hz to 10Hz. Noise levels are up to 10dB too high in this frequency band. END PROBLEM RESOLUTION REPORT ASL2004:039 2004/04/06 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The high frequency noise problem on the STS2 at KBS seems to disappear completely at 2004, 092, 20:11. High frequency noise levels return to normal at this time. END **************************************************************************** DATA PROBLEM REPORT IDA2012:010 2012/06/13 IDA DCC Erik Klimczak IDA MSVF II *** 2012,158,00:00:00 2012,158,00:00:00 Problem Description OTHER IDA station MSVF is down since day 2012,158-12:41 due to communication problems between the DAS and the ISP that are yet to be determined. END PROBLEM RESOLUTION REPORT IDA2012:010 2013/03/07 IDA Erik Klimczak Description of Problem Resolution RESOLUTION Data acquisition was restored on day 2013,018 after IDA engineers visited the station and upgraded it to a Quanterra Q330HR system. Sensors installed include KS54000 and Trillim 120 posthole seismometers, and an Episensor strong motion sensor. END **************************************************************************** DATA PROBLEM REPORT IDA2012:011 2012/06/13 IDA DCC Erik Klimczak IDA BFO II BHZ-00,LHZ-00,VHZ-00 2012,155,00:00:00 2012,155,00:00:00 Problem Description OTHER The vertical channels from the STS-1 seismometer are intermittently drifting out of normal operating range and become flat-lined due to loss of vacuum for the bell jar enclosure. The station operator plans on re-installing the STS-1 seismometer. END PROBLEM RESOLUTION REPORT IDA2012:011 2012/06/28 IDA Erik Klimczak Description of Problem Resolution RESOLUTION The vertical channels from the STS-1 seismometer are back in normal operating range after the station operator re-installed the STS-1 seismometer on day 2012,167-15:41. END **************************************************************************** DATA PROBLEM REPORT IDA2012:012 2012/06/28 IDA DCC Erik Klimczak IDA AAK II *** 2012,169,00:00:00 2012,169,00:00:00 Problem Description OTHER IDA station AAK is down as of day 2012,169-01:40 due to damages caused by a storm. The station is acquiring data, however, the GPS clock is unlocked and timing of the data is uncertain. New GPS antennas, surge protectors, and a bi-directional GPS cable are being shipped to the station. END PROBLEM RESOLUTION REPORT IDA2012:012 2012/09/07 IDA Erik Klimczak Description of Problem Resolution RESOLUTION The GPS clock for the AAK10 digitizer locked on day 2012,184-16:55. The GPS clock for the AAK00 digitizer remained unlocked until day 2012,206-06:41 when the station operator replaced the external GPS cable with an updated bi-directional cable sent from UCSD. END **************************************************************************** DATA PROBLEM REPORT IDA2012:013 2012/06/28 IDA DCC Erik Klimczak IDA ERM II *** 2012,177,00:00:00 2012,177,00:00:00 Problem Description OTHER IDA station ERM is down as of day 2012,177-22:37 due to problems with the DAS that are yet to be determined. END PROBLEM RESOLUTION REPORT IDA2012:013 2012/09/07 IDA Erik Klimczak Description of Problem Resolution RESOLUTION IDA station ERM is back on-line after two outages from day 2012,177 to 2012,187, and from day 2012,225 to 2012,233. Data acquisition was restored after the station operator visited the station to cycle power to the DAS. END **************************************************************************** DATA PROBLEM REPORT IDA2012:014 2012/06/28 IDA DCC Erik Klimczak IDA LVZ II *** 2012,162,00:00:00 2012,162,00:00:00 Problem Description OTHER IDA station LVZ is down as of day 2012,162-04:47 due to problems with the DAS that are yet to be determined. The station operator has been requested to cycle power to the DAS. END PROBLEM RESOLUTION REPORT IDA2012:014 2012/12/07 IDA Erik Klimczak Description of Problem Resolution RESOLUTION IDA station LVZ is back on-line as of day 2012,291 after it was upgraded to a Quanterra Q330 system. Sensors include STS-1 and GS-13 seismometers. END **************************************************************************** DATA PROBLEM REPORT IDA2012:015 2012/06/28 IDA DCC Erik Klimczak IDA TAU II *** 2011,173,00:00:00 2011,173,00:00:00 Problem Description OTHER There is excessive background noise for data from all sensors for reasons yet to be determined. The noise is non-seismic in nature and suspected to be from an external source. END **************************************************************************** DATA PROBLEM REPORT ASL2004:031 2004/03/18 ASL DCC Valerie Peyton ASL OTAV IU */* 2004,077,17:10:00 2004,082,00:23:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. An ASL field engineer is on location at OTAV for station maintenance. Expect variable data quality and availability, as well as calibrations and other tests. END PROBLEM RESOLUTION REPORT ASL2004:031 2004/03/22 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The ASL field engineer left OTAV in excellent working condition at 2004, 082, 00:23. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2004:032 2004/03/18 ASL DCC Valerie Peyton ASL PTGA IU 00/BHZ 1999,092,23:40:00 1999,092,23:40:00 Problem Description HIGH FREQUENCY NOISE SEED COMMENT REFERENCE C 4508 Channel has high levels of high frequency noise. The Z component of the 54000 at PTGA has excessive high frequency noise beginning at 1.5Hz. Noise levels are up to 20dB higher than they should be. The source of the problem is in the mass module itself, and the only means of repair is to dismantle the seismometer and ship the faulty module to the manufacturer. Whether or not this module is repaired will be determined in part by whether or not we can get the secondary seismometer at PTGA functioning. If we can, we will likely not repair the 54000 Z component, since the low frequency response of the 54000 Z component is just fine and the secondary seismometer is better at high frequencies anyway. END **************************************************************************** DATA PROBLEM REPORT ASL2004:033 2004/03/18 ASL DCC Valerie Peyton ASL KBS IU 10/*HN 2003,257,01:05:00 2004,094,03:00:00 Problem Description NOISE SEED COMMENT REFERENCE C 4504 Channel exibits high levels of low frequency noise. The N component of the STS2 at KBS is exhibiting excessive levels of long period noise. Beginning at 0.1Hz and continuing down through all of the low frequencies, noise levels are 5 to 40dB higher than they should be. Data quality is severely compromised in these frequencies. The problem gradually worsens over time. END PROBLEM RESOLUTION REPORT ASL2004:033 2004/04/12 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The noise problem on the N component of the STS2 at KBS solved itself at 2004, 094, 03:00. We have determined neither the source of the noise, nor its solution. Regardless, data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2004:034 2004/03/22 ASL DCC Valerie Peyton ASL MBWA IU 00/*H* 2004,082,06:04:00 2004,082,06:04:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. All three components of the 54000 at MBWA are producing digitizer noise. This started when the station came back up after a catastrophic power outage. END **************************************************************************** DATA PROBLEM REPORT ASL2004:035 2004/03/22 ASL DCC Valerie Peyton ASL QSPA IU 20/*H* 2004,079,20:24:00 2004,081,07:58:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. All three components of the STS2 at QSPA are not useful during this time span. The station operator was working on the instrument in an effort to keep the masses from becoming pegged during the winter. END PROBLEM RESOLUTION REPORT ASL2004:035 2004/03/22 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The QSPA station operator finished working on the STS2 at 2004, 081, 07:58. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2004:036 2004/03/25 ASL DCC Valerie Peyton ASL KBS IU */* 2004,085,12:57:00 2004,085,21:54:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. The station operator is at KBS relevelling the STS2. Expect variable data quality. END PROBLEM RESOLUTION REPORT ASL2004:036 2004/03/26 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Relevelling of the KBS STS2 ended at 2004, 085, 21:54. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2004:037 2004/04/01 ASL DCC Valerie Peyton ASL CHTO IU */* 2004,059,05:20:00 2004,061,04:40:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 451 Timing MAY be in error, as clock is unlocked. The GPS clock at CHTO is unlocked from the timing standard. Timing quailty cannot be guaranteed. END PROBLEM RESOLUTION REPORT ASL2004:037 2004/04/01 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The CHTO GPS clock regained its lock at 2004, 061, 04:40. Timing quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2004:038 2004/04/02 ASL DCC Valerie Peyton ASL SDV IU 00/*H* 20/*N* 2004,092,18:54:00 2004,093,15:06:00 Problem Description OTHER SEED COMMENT REFERENCE C 4336 00 and 20 channel inputs swapped (ie, 00 <=> 20). During this time period, the STS1 data (00 location code) from SDV was being recorded on the FBA23 channels (20 location code), and vice versa. This was done as a test to see if we could track down a noise problem on the STS1 channels. END PROBLEM RESOLUTION REPORT ASL2004:038 2004/04/02 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The SDV STS1 and FBA23 channel inputs were returned to their proper recording configuration at 2004, 093, 15:06. Channels are once more properly named. END **************************************************************************** DATA PROBLEM REPORT ASL1998:022 1998/03/31 ASL DCC Tyler Storm ASL XMAS IU ?H? 1998,057,09:00:00 1998,092,00:40:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. Channels are down. END PROBLEM RESOLUTION REPORT ASL1998:022 1998/04/27 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION Instrument was re-centered 1998,092. END **************************************************************************** DATA PROBLEM REPORT ANSS2005:047 2005/09/08 ANSS DCC Mark Meremonte ANSS MIAR US ALL 2005,001,00:00:00 2006,001,00:00:00 Problem Description OTHER Calendar year of 2005: Station susceptible to short and long periods of down times; Cause(s): Weather conditions; Rain/Snow/Ice on dish; Power outage; VSAT communication difficulties; Other out of our control conditions Extended down times of 1 day or more enumerated here: DDD+HH:MM to DDD+HH:MM UTC --------- --------- 021+18:30 -- 025+17:00 END **************************************************************************** DATA PROBLEM REPORT ASL1998:021 1998/03/31 ASL DCC Tyler Storm ASL MAKZ IU BHE,LHE,VHE,UHE,00/*HE 1998,001,00:00:00 1998,001,00:00:00 Problem Description SPIKES SEED COMMENT REFERENCE C 4510 Channel has frequent spiking. Huge spikes are present in the E/W data (STS-1). END PROBLEM RESOLUTION REPORT ASL1998:021 2000/09/13 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The character of the spiking on the STS-1 E/W at MAKZ changes over time: the spikes start out huge and widely spaced in time; they currently are considerably smaller and more frequent. It is possible the culprit is moisture in the connectors. Until we can get a field engineer to MAKZ, the STS-1 E component will remain spiky. END **************************************************************************** DATA PROBLEM REPORT ANSS2005:046 2005/09/08 ANSS DCC Mark Meremonte ANSS MCWV US ALL 2005,001,00:00:00 2006,001,00:00:00 Problem Description OTHER Calendar year of 2005: Station susceptible to short and long periods of down times; Cause(s): Weather conditions; Rain/Snow/Ice on dish; Power outage; VSAT communication difficulties; Other out of our control conditions NOTE: Appears this site particularly prone to dropouts due to VSAT problems. Extended down times of 1 day or more enumerated here: DDD+HH:MM to DDD+HH:MM UTC --------- --------- 020+17:54 -- 031+15:38 056+18:15 -- 059+15:30 098+20:53 -- 102+16:51 END **************************************************************************** DATA PROBLEM REPORT ASL1998:020 1998/03/31 ASL DCC Tyler Storm ASL MAKZ IU SHZ,SHN,SHE,HHZ,HHN,HHE 1998,014,00:00:00 1998,233,14:50:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4400 Channel data quality is very poor. Channels from the STS-2 should be considered unusable. Starting around 1998,038 large events can be seen, but something is still not working correctly. The background noise is identical on all three component. It looks like some sort of electrical signal is "bleeding over" into some of the electronics common to all three individual components. Or, possibly this is what data from a triaxial instrument looks like when one of individual masses is against the stop. Since Z, N, and E streams are mathematically/ electronically derived from the U, V, W sensors this may be what is happening. Whatever the case, the instrument is not fully functional through at least 1998,038. END PROBLEM RESOLUTION REPORT ASL1998:020 2000/09/14 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION On 1998,233, someone recentered the STS-2 at MAKZ. By 14:50 the data have settled down and the quality is back to normal. END **************************************************************************** DATA PROBLEM REPORT ANSS2005:049 2005/09/08 ANSS DCC Mark Meremonte ANSS MSO US ALL 2005,001,00:00:00 2006,001,00:00:00 Problem Description OTHER Calendar year of 2005: Station susceptible to short and long periods of down times; Cause(s): Weather conditions; Rain/Snow/Ice on dish; Power outage; VSAT communication difficulties; Other out of our control conditions Extended down times of 1 day or more enumerated here: DDD+HH:MM to DDD+HH:MM UTC --------- --------- 013:12:45 -- 017+16:45 END **************************************************************************** DATA PROBLEM REPORT ANSS2005:048 2005/09/08 ANSS DCC Mark Meremonte ANSS MNTX US ALL 2005,001,00:00:00 2006,001,00:00:00 Problem Description OTHER Calendar year of 2005: Station susceptible to short and long periods of down times; Cause(s): Weather conditions; Rain/Snow/Ice on dish; Power outage; VSAT communication difficulties; Other out of our control conditions Extended down times of 1 day or more enumerated here: DDD+HH:MM to DDD+HH:MM UTC --------- --------- 069+10:57 -- 072+16:07 END **************************************************************************** DATA PROBLEM REPORT ASL2004:030 2004/03/17 ASL DCC Tyler Storm ASL WVT IU BHE 2004,072,23:53:00 2004,072,23:53:00 Problem Description HIGH FREQUENCY NOISE SEED COMMENT REFERENCE C 4502 Channel has intermittant high frequency noise. The E/W STS-1 has high-frequency (1hz and higher) noise starting around day 2004,072 and becoming quite pronounced by 2004,077. END **************************************************************************** DATA PROBLEM REPORT ASL1998:026 1998/04/16 ASL DCC Tyler Storm ASL SNZO IU SHN, HHN 1998,084,03:28:31 1998,089,22:11:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. N/S channels from the CMG3-T are dead. END PROBLEM RESOLUTION REPORT ASL1998:026 2001/10/13 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The CMG3-T at SNZO was recentered late in the day on 1998,089. Data quality returned to normal. END **************************************************************************** DATA PROBLEM REPORT IDA2012:005 2012/04/27 IDA DCC Erik Klimczak IDA KDAK II LN*00,EN*00 2012,102,00:00:00 2012,102,00:00:00 Problem Description DEAD CHANNEL All channels from the FBA strong motion sensor are non-seismic for reasons yet to be determined. END PROBLEM RESOLUTION REPORT IDA2012:005 2013/01/02 IDA Erik Klimczak Description of Problem Resolution RESOLUTION An IDA engineer visited the station and replaced the FBA strong motion sensor with an Episensor. END **************************************************************************** DATA PROBLEM REPORT ANSS2005:043 2005/09/07 ANSS DCC Mark Meremonte ANSS KSU1 US ALL 2005,001,00:00:00 2006,001,00:00:00 Problem Description OTHER Calendar year of 2005: Station susceptible to short and long periods of down times; Cause(s): Weather conditions; Rain/Snow/Ice on dish; Power outage; VSAT communication difficulties; Other out of our control conditions Extended down times of 1 day or more enumerated here: DDD+HH:MM to DDD+HH:MM UTC --------- --------- 063+23:32 -- 065+14:54 END **************************************************************************** DATA PROBLEM REPORT ASL1998:025 1998/04/15 ASL DCC Tyler Storm ASL LBTB GT BHE, LHE, VHE 1998,099,08:43:00 1998,119,17:47:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4630 Response may be invalid. We are seeing intermittent "single-ended" output from the E/W borehole 54000 sensor. Between these episodes, the sensor response is correct. GTSN field engineers are currently working with the local techs to pinpoint the failure. END PROBLEM RESOLUTION REPORT ASL1998:025 2007/01/12 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The LBTB 54000 E response problems end at 1998, 119, 17:47. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT IDA2012:006 2012/04/27 IDA DCC Erik Klimczak IDA MSVF II LN*00,EN*00 2012,102,00:00:00 2012,102,00:00:00 Problem Description DEAD CHANNEL The FBA strong motion sensor is not connected due to damaged components in the seismometer interface. END **************************************************************************** DATA PROBLEM REPORT ANSS2005:042 2005/09/07 ANSS DCC Mark Meremonte ANSS JFWS US ALL 2005,001,00:00:00 2006,001,00:00:00 Problem Description OTHER Calendar year of 2005: Station susceptible to short and long periods of down times; Cause(s): Weather conditions; Rain/Snow/Ice on dish; Power outage; VSAT communication difficulties; Other out of our control conditions Extended down times of 1 day or more enumerated here: DDD+HH:MM to DDD+HH:MM UTC --------- --------- 025+08:42 -- 026+23:25 028+00:46 -- 039+00:57 122+04:21 -- 162+16:22 END **************************************************************************** DATA PROBLEM REPORT ASL1998:024 1998/04/06 ASL DCC Tyler Storm ASL SJG IU BHZ, LHZ, VHZ, UHZ, 00/*HZ 1998,066,18:05:00 2001,157,01:00:00 Problem Description SPIKES SEED COMMENT REFERENCE C 4510 Channel has frequent spiking. Vertical data streams contain large spikes. END PROBLEM RESOLUTION REPORT ASL1998:024 2001/06/08 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION While field engineers were installing CTBTO-related equipment at SJG, they were able to solve the spiking problem on the vertical instrument. The sources of the spiking appeared to have been: moisture in the instrument, moisture in the data cables, and lack of vacuum seal on the instrument. These problems have been fixed. However, SJG is located in a very humid climate, so moisture and vacuum problems are likely to recur. END **************************************************************************** DATA PROBLEM REPORT IDA2012:007 2012/04/27 IDA DCC Erik Klimczak IDA PALK II LN*00,EN*00 2012,102,00:00:00 2012,102,00:00:00 Problem Description DEAD CHANNEL All channels from the FBA strong motion sensor are non-seismic for reasons yet to be determined. END **************************************************************************** DATA PROBLEM REPORT ANSS2005:045 2005/09/07 ANSS DCC Mark Meremonte ANSS LTX US ALL 2005,001,00:00:00 2006,001,00:00:00 Problem Description OTHER Calendar year of 2005: Station susceptible to short and long periods of down times; Cause(s): Weather conditions; Rain/Snow/Ice on dish; Power outage; VSAT communication difficulties; Other out of our control conditions Extended down times of 1 day or more enumerated here: DDD+HH:MM to DDD+HH:MM UTC --------- --------- 015+12:20 -- 026+21:51 END **************************************************************************** DATA PROBLEM REPORT ASL1998:023 1998/04/01 ASL DCC Tyler Storm ASL MAKZ IU BHZ,LHZ,VHZ,UHZ 1998,042,00:00:00 1998,141,00:00:00 Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE C 1850 Sensor has lost vacuum containment. The bell jar containing the vertical STS-1 lost vacuum sometime on 1998,042. Currently, the VH background noise is about +/- 4 million counts. END PROBLEM RESOLUTION REPORT ASL1998:023 2000/09/13 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The vacuum in the STS-1 Z bell jar at MAKZ was reestablished on 1998,141. Background noise returned to normal levels and events are once more visible as of the beginning of the day on 1998,141. END **************************************************************************** DATA PROBLEM REPORT IDA2012:008 2012/05/15 IDA DCC Erik Klimczak IDA ABPO II BH*-10 2012,127,00:00:00 2012,127,00:00:00 Problem Description OTHER All channels from the STS-2 seismometer are showing abrupt changes in amplitudes as of day 2012,127-12:00, for reasons yet to be determined. END PROBLEM RESOLUTION REPORT IDA2012:008 2012/09/07 IDA Erik Klimczak Description of Problem Resolution RESOLUTION The station operator replaced the STS-2 on day 2012,199-10:45 with one shipped from UCSD. Remote calibration is now possible, and the data quality has improved. END **************************************************************************** DATA PROBLEM REPORT ANSS2005:044 2005/09/07 ANSS DCC Mark Meremonte ANSS LRAL US ALL 2005,001,00:00:00 2006,001,00:00:00 Problem Description OTHER Calendar year of 2005: Station susceptible to short and long periods of down times; Cause(s): Weather conditions; Rain/Snow/Ice on dish; Power outage; VSAT communication difficulties; Other out of our control conditions Extended down times of 1 day or more enumerated here: DDD+HH:MM to DDD+HH:MM UTC --------- --------- END **************************************************************************** DATA PROBLEM REPORT IDA2012:009 2012/05/15 IDA DCC Erik Klimczak IDA KAPI II *** 2012,135,00:00:00 2012,135,00:00:00 Problem Description OTHER IDA station KAPI is down due to problems with the ISP. Data are being acquired, however there is significant gapping. A new computer is being prepared to ship to the station. END PROBLEM RESOLUTION REPORT IDA2012:009 2012/06/28 IDA Erik Klimczak Description of Problem Resolution RESOLUTION Continuous data acquisition was restored after the station operator replaced the station computer on day 2012,145-01:51. END **************************************************************************** DATA PROBLEM REPORT ASL1998:029 1998/05/15 ASL DCC Tyler Storm ASL GUMO IU SHN, HHN 1998,108,22:55:00 1998,135,07:40:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. N/S channels from the CMG3-T instrument are dead. END **************************************************************************** DATA PROBLEM REPORT ASL1998:028 1998/05/14 ASL DCC Tyler Storm ASL NWAO IU ? 1998,098,16:34:00 1998,119,04:22:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 440 Clock Unlocked. Station has lost the timing standard. END PROBLEM RESOLUTION REPORT ASL1998:028 2001/10/13 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION A couple of parts in the data acquisition system had failed, and their failure interfered with proper timing in the data. The station operator at NWAO replaced the defective parts and timing quality returned to normal early in the day on 1998,119. END **************************************************************************** DATA PROBLEM REPORT ANSS2005:041 2005/09/07 ANSS DCC Mark Meremonte ANSS JCT US ALL 2005,001,00:00:00 2006,001,00:00:00 Problem Description OTHER Calendar year of 2005: Station susceptible to short and long periods of down times; Cause(s): Weather conditions; Rain/Snow/Ice on dish; Power outage; VSAT communication difficulties; Other out of our control conditions Extended down times of 1 day or more enumerated here: DDD+HH:MM to DDD+HH:MM UTC --------- --------- 087+21:40 -- 092+17:58 END **************************************************************************** DATA PROBLEM REPORT ASL1998:027 1998/04/30 ASL DCC Tyler Storm ASL KIP IU SHZ,SHN,SHE,HHZ,HHN,HHE 1998,072,21:11:00 1998,100,02:49:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. Channels from the STS-2 instrument are dead. END PROBLEM RESOLUTION REPORT ASL1998:027 1998/04/30 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION Instrument was re-centered. END **************************************************************************** DATA PROBLEM REPORT ANSS2005:040 2005/09/06 ANSS DCC Mark Meremonte ANSS ISCO US ALL 2005,001,00:00:00 2006,001,00:00:00 Problem Description OTHER Calendar year of 2005: Station susceptible to short and long periods of down times; Cause(s): Weather conditions; Rain/Snow/Ice on dish; Power outage; VSAT communication difficulties; Other out of our control conditions Extended down times of 1 day or more enumerated here: DDD+HH:MM to DDD+HH:MM UTC --------- --------- 031+06:53 -- 033:21:45 109+15:41 -- 119+19:18 END **************************************************************************** DATA PROBLEM REPORT ASL2004:028 2004/03/12 ASL DCC Valerie Peyton ASL SDV IU */* 2004,070,00:00:00 2004,079,19:27:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. An ASL field engineer is on location at SDV for station maintenance. Expect variable data quality and availability, as well as calibrations and other tests. END PROBLEM RESOLUTION REPORT ASL2004:028 2004/03/19 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION SDV station maintenance ended at 2004, 079, 19:27. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2004:029 2004/03/16 ASL DCC Valerie Peyton ASL MDJ IC 10/*H* 2004,075,09:29:00 2004,080,04:04:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. All three components of the STS2 at MDJ have gone to digitizer noise. We are investigating the source and solution of the problem. Meanwhile, data are not useable. END PROBLEM RESOLUTION REPORT ASL2004:029 2004/03/22 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The problem with the STS2 at MDJ was solved at 2004, 080, 04:04. We do not know what caused the problem, or what solved it, but data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT IDA2012:001 2012/01/24 IDA DCC Erik Klimczak IDA MSVF II *** 2012,005,00:00:00 2012,005,00:00:00 Problem Description OTHER IDA station MSVF is down as of day 2012,005-05:04 due to power problems at the station. IDA engineers are working with the station operator to resolve the power problems. END PROBLEM RESOLUTION REPORT IDA2012:001 2012/03/20 IDA Erik Klimczak Description of Problem Resolution RESOLUTION IDA station MSVF is back on-line as of day 2012,069-22:28 after an IDA engineer visited the station and restored power. END **************************************************************************** DATA PROBLEM REPORT IDA2012:002 2012/02/15 IDA DCC Erik Klimczak IDA JTS II BH*-00 2012,023,00:00:00 2012,023,00:00:00 Problem Description OTHER All channels from the STS-1 seismometer are showing high background noise for reasons yet to be determined. Spiking on the vertical and East-West channels is highly correlated since day 2012,023. END **************************************************************************** DATA PROBLEM REPORT IDA2012:003 2012/03/20 IDA DCC Erik Klimczak IDA ESK II *** 2012,066,00:00:00 2012,080,00:00:00 Problem Description OTHER IDA station ESK was down from day 2012,066-17:11 to 2012,080-05:26 due to a power outage that caused loss of communication between the station computer and digitizers. Normal data acquisition resumed after the station operator restarted the fiber-optic transciever and cycled power to the digitizers. END **************************************************************************** DATA PROBLEM REPORT IDA2012:004 2012/04/11 IDA DCC Erik Klimczak IDA MSEY II *** 2012,052,00:00:00 2012,099,00:00:00 Problem Description OTHER IDA station MSEY was down from day 2012,052 to 2012,099 due to equipment damaged by lightning. Data acquisition was restored after IDA engineers visited the station and replaced ethernet switches and restored communication between the vault and recording room. END **************************************************************************** DATA PROBLEM REPORT ASL2004:020 2004/03/04 ASL DCC Valerie Peyton ASL JOHN IU 00/*H2 2004,064,18:50:00 2004,082,08:56:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The 2 component of the CMG3-T-B at JOHN has fallen against its stop. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2004:020 2004/03/22 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The 2 component mass of the CMG3-T-B at JOHN has returned to center. Data quality returns to normal at 2004, 082, 08:56. END **************************************************************************** DATA PROBLEM REPORT ASL2004:021 2004/03/05 ASL DCC Tyler Storm ASL MAJO IU 00/*HN 2000,160,00:00:00 2000,160,00:00:00 Problem Description NOISE SEED COMMENT REFERENCE C 4503 Channel has intermittant low frequency noise. Data has low-frequency noise and occasional pulsing. END **************************************************************************** DATA PROBLEM REPORT ASL2004:022 2004/03/08 ASL DCC Valerie Peyton ASL ANMO IU 10/*HZ 2003,313,05:22:00 2003,314,17:52:00 Problem Description NOISE SEED COMMENT REFERENCE C 4507 Channel has excessively high noise levels. Something happened to the Z component of the CMG3-T-B at ANMO. Perhaps it was hit by lightning. Regardless, noise levels on this component are excessively high for all frequencies. From 5Hz - 20Hz, the PSD is 5 - 20dB too high; from 0.5Hz - 2Hz, the PSD is 2 - 10dB too high; from 0.1Hz down through all the low frequencies, the PSD is 2 - 40dB too high. END PROBLEM RESOLUTION REPORT ASL2004:022 2004/03/08 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION An ASL field engineer was able to solve the noise problem on the ANMO CMG3-T-B Z component by locking, unlocking, and recentering the mass. Data quality returns to normal at 2003, 314, 17:52. END **************************************************************************** DATA PROBLEM REPORT ASL2004:023 2004/03/08 ASL DCC Valerie Peyton ASL SAML IU */* 2003,125,00:00:00 2003,134,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE S 110 TEST DATA: Calibration, and testing in progress. ASL field engineers are on site at SAML installing the station. Expect variable data availability and quality, calibrations, and other tests. END PROBLEM RESOLUTION REPORT ASL2004:023 2004/03/08 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The ASL field engineers left SAML in excellent operational order on 2003, 134. END **************************************************************************** DATA PROBLEM REPORT ASL2004:024 2004/03/09 ASL DCC Tyler Storm ASL HIA IC 10/*HZ 10/*HE 2004,007,02:05:00 2004,007,02:05:00 Problem Description SPIKES SEED COMMENT REFERENCE C 4525 Channel has spiking and other data glitches. The GS13 at HIA is producing intermittant bad data. There are "events" that look like data glitches. The Z & E channels have nearly identical waveforms during these short-lived "events". Genuine seimsic events are also being recorded. Sometimes a tiny glitch appears on the N channel at the same time that the large glitches appear on the Z & E channels. However, the amplitude of the glitches on the N is 6 times or more smaller. It is possible that the digitizer board, or the power board, is beginning to fail. Data should be used with caution. END **************************************************************************** DATA PROBLEM REPORT ASL2004:025 2004/03/11 ASL DCC Valerie Peyton ASL OTAV IU 10/*HZ 2004,068,20:05:00 2004,077,19:53:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The Z component of the CMG3-T at OTAV is pegged. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2004:025 2004/03/18 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION An ASL field engineer was able to recenter the OTAV CMG3-T during a field visit. Data quality returns to normal at 2004, 077, 19:53. END **************************************************************************** DATA PROBLEM REPORT ASL2004:026 2004/03/11 ASL DCC Valerie Peyton ASL QSPA IU 20/*H* 2004,070,06:54:00 2004,070,15:27:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. All three components of the STS2 at QSPA are pegged. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2004:026 2004/03/11 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION We were able to recenter the QSPA STS2 remotely. Data quality returns to normal at 2004, 070, 15:27. END **************************************************************************** DATA PROBLEM REPORT ASL2004:027 2004/03/12 ASL DCC Valerie Peyton ASL SAML IU 10/*HZ 10/*H2 2003,356,12:42:00 2004,213,14:52:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The Z and 2 components of the CMG3-T-B at SAML are pegged. Data are unuseable. END END PROBLEM RESOLUTION REPORT ASL2004:027 2004/09/10 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION All three components of the SAML CMG3T-B recovered when the instrument was recentered. Data quality returns to normal at 2004, 213, 14:52. END **************************************************************************** DATA PROBLEM REPORT ASL1998:033 1998/10/23 ASL DCC Tyler Storm ASL KONO IU BHN, LHN, VHN, UHN 1998,274,18:30:00 1999,044,21:30:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. Data are unusable. END PROBLEM RESOLUTION REPORT ASL1998:033 1999/03/12 ASL DCC Tyler Description of Problem Resolution RESOLUTION One of our field engineers set up a new N/S STS-1 when he was at the station doing the Y2K upgrade. END **************************************************************************** DATA PROBLEM REPORT ANSS2005:058 2005/09/13 ANSS DCC Mark Meremonte ANSS SMY AT ALL 2004,275,00:00:00 2005,001,00:00:00 Problem Description OTHER Calendar year of 2004: Station susceptible to short and long periods of down times; Cause(s): Weather conditions; Rain/Snow/Ice on dish; Power outage; VSAT communication difficulties; Other out of our control conditions Extended down times of 1 day or more enumerated here: DDD+HH:MM to DDD+HH:MM UTC --------- --------- END **************************************************************************** DATA PROBLEM REPORT ASL1998:032 1998/09/09 ASL DCC Tyler Storm ASL ULN IU BHZ,LHZ,VHZ,UHZ 1998,208,00:00:00 1998,263,16:00:00 Problem Description NOISE SEED COMMENT REFERENCE C 1850 Sensor has lost vacuum containment. The bell jar containing the vertical seismometer has lost vacuum. END PROBLEM RESOLUTION REPORT ASL1998:032 2003/10/02 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION There is a gap in the ULN data from 1998,258 to 1998, 263. When the data returns 1998, 263, 16:00, the data from the STS1 vertical component indicates that the vacuum has been reestablished in the bell jar. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ANSS2005:057 2005/09/13 ANSS DCC Mark Meremonte ANSS SIT AT ALL 2005,001,00:00:00 2006,001,00:00:00 Problem Description OTHER Calendar year of 2005: Station susceptible to short and long periods of down times; Cause(s): Weather conditions; Rain/Snow/Ice on dish; Power outage; VSAT communication difficulties; Other out of our control conditions Extended down times of 1 day or more enumerated here: DDD+HH:MM to DDD+HH:MM UTC --------- --------- END **************************************************************************** DATA PROBLEM REPORT ASL1998:031 1998/06/15 ASL DCC Tyler Storm ASL XMAS IU ? 1998,140,04:00:00 1998,166,06:40:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. Channels are down. END PROBLEM RESOLUTION REPORT ASL1998:031 2001/08/16 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Instrument was recentered early in the day on 1998,166. Data quality returns to normal. END **************************************************************************** DATA PROBLEM REPORT ASL1998:030 1998/05/26 ASL DCC Tyler Storm ASL LSZ IU ? 1998,093,00:00:00 1998,111,10:25:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE C 4210 Time uncertain. Clock is drifting; timing is unreliable. END PROBLEM RESOLUTION REPORT ASL1998:030 2006/07/14 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION LSZ timing returned to normal at 1998, 111, 10:25. END **************************************************************************** DATA PROBLEM REPORT ANSS2005:059 2005/09/13 ANSS DCC Mark Meremonte ANSS SMY AT ALL 2005,001,00:00:00 2006,001,00:00:00 Problem Description OTHER Calendar year of 2005: Station susceptible to short and long periods of down times; Cause(s): Weather conditions; Rain/Snow/Ice on dish; Power outage; VSAT communication difficulties; Other out of our control conditions Extended down times of 1 day or more enumerated here: DDD+HH:MM to DDD+HH:MM UTC --------- --------- END **************************************************************************** DATA PROBLEM REPORT ASL1998:037 1998/12/10 ASL DCC George Slad ASL SPA IU LGZ, VGZ, UGZ, 30/*GZ, 40/*GZ 1997,339,03:00:00 2001,005,20:00:00 Problem Description Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 7100 Response information not available at this time. Channels LGZ, VGZ, and UGZ have incorrect responses described. These channels are recording a gravimeter, not an STS-1. This problem will be resolved as soon as the ASL DCC receives the information needed to properly describe the gravimeter's response. END PROBLEM RESOLUTION REPORT ASL1998:037 2001/08/30 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Acquisition of data from the gravimeters at SPA ended near the end of the day on 2001,005. We have never received the correct response information for these instruments; unfortunately, at this point it seems unlikely that we ever will. The gravimeters were inoperational for much of the time that their data was being recorded. On-site repairs were attempted multiple times, but never were successful. The instruments were taken out of service as a result of the inability to repair them. END **************************************************************************** DATA PROBLEM REPORT ANSS2005:054 2005/09/09 ANSS DCC Mark Meremonte ANSS WMOK US ALL 2005,001,00:00:00 2006,001,00:00:00 Problem Description OTHER Calendar year of 2005: Station susceptible to short and long periods of down times; Cause(s): Weather conditions; Rain/Snow/Ice on dish; Power outage; VSAT communication difficulties; Other out of our control conditions Extended down times of 1 day or more enumerated here: DDD+HH:MM to DDD+HH:MM UTC --------- --------- 113+22:30 -- 120+12:44 END **************************************************************************** DATA PROBLEM REPORT ASL1998:036 1998/10/23 ASL DCC Tyler Storm ASL JOHN IU SH1, HHN 1998,258,13:30:00 1998,331,01:18:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The SH1 and HHN channels from the CMG-3-T are dead. END PROBLEM RESOLUTION REPORT ASL1998:036 2001/08/08 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The CMG3-T-B at JOHN was recentered on 1998,331 early in the day. Data quality has returned to normal. END **************************************************************************** DATA PROBLEM REPORT ANSS2005:053 2005/09/09 ANSS DCC Mark Meremonte ANSS OXF US ALL 2005,001,00:00:00 2006,001,00:00:00 Problem Description OTHER Calendar year of 2005: Station susceptible to short and long periods of down times; Cause(s): Weather conditions; Rain/Snow/Ice on dish; Power outage; VSAT communication difficulties; Other out of our control conditions Extended down times of 1 day or more enumerated here: DDD+HH:MM to DDD+HH:MM UTC --------- --------- END **************************************************************************** DATA PROBLEM REPORT ASL1998:035 1998/10/23 ASL DCC Tyler Storm ASL KEV IU BH?, LH?, VH?, UH? 1998,247,11:35:00 1998,272,14:35:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. All data from the STS-1 instruments are dead. END PROBLEM RESOLUTION REPORT ASL1998:035 2001/10/18 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The STS-1 at KEV was restored to operational condition roughly half-way through the day on 1998,272. Data quality returned to normal. END **************************************************************************** DATA PROBLEM REPORT ANSS2005:056 2005/09/13 ANSS DCC Mark Meremonte ANSS SIT AT ALL 2004,275,00:00:00 2005,001,00:00:00 Problem Description OTHER Calendar year of 2004: Station susceptible to short and long periods of down times; Cause(s): Weather conditions; Rain/Snow/Ice on dish; Power outage; VSAT communication difficulties; Other out of our control conditions Extended down times of 1 day or more enumerated here: DDD+HH:MM to DDD+HH:MM UTC --------- --------- END **************************************************************************** DATA PROBLEM REPORT ASL1998:034 1998/10/23 ASL DCC Tyler Storm ASL KBS DW BHZ, LHZ, VHZ, UHZ 1998,224,08:45:00 1999,105,12:00:00 Problem Description NOISE SEED COMMENT REFERENCE C 1850 Sensor has lost vacuum containment. The bell jar containing the vertical instrument has lost vacuum. The vertical data are very noisy during this time frame. END **************************************************************************** DATA PROBLEM REPORT ANSS2005:055 2005/09/09 ANSS DCC Mark Meremonte ANSS WUAZ US ALL 2005,001,00:00:00 2006,001,00:00:00 Problem Description OTHER Calendar year of 2005: Station susceptible to short and long periods of down times; Cause(s): Weather conditions; Rain/Snow/Ice on dish; Power outage; VSAT communication difficulties; Other out of our control conditions Extended down times of 1 day or more enumerated here: DDD+HH:MM to DDD+HH:MM UTC --------- --------- END **************************************************************************** DATA PROBLEM REPORT ANSS2005:050 2005/09/08 ANSS DCC Mark Meremonte ANSS NATX US ALL 2004,275,00:00:00 2005,001,00:00:00 Problem Description OTHER Calendar year of 2004: Station susceptible to short and long periods of down times; Cause(s): Weather conditions; Rain/Snow/Ice on dish; Power outage; VSAT communication difficulties; Other out of our control conditions Extended down times of 1 day or more enumerated here: DDD+HH:MM to DDD+HH:MM UTC --------- --------- 336+09:19 -- 342+01:27 346+22:41 -- 348+19:52 END **************************************************************************** DATA PROBLEM REPORT ANSS2005:052 2005/09/09 ANSS DCC Mark Meremonte ANSS OCWA US ALL 2005,001,00:00:00 2006,001,00:00:00 Problem Description OTHER Calendar year of 2005: Station susceptible to short and long periods of down times; Cause(s): Weather conditions; Rain/Snow/Ice on dish; Power outage; VSAT communication difficulties; Other out of our control conditions Extended down times of 1 day or more enumerated here: DDD+HH:MM to DDD+HH:MM UTC --------- --------- 008+20:06 -- 021+02:47 070+08:20 -- 134+00:28 END **************************************************************************** DATA PROBLEM REPORT ANSS2005:051 2005/09/09 ANSS DCC Mark Meremonte ANSS NEW US ALL 2005,001,00:00:00 2006,001,00:00:00 Problem Description OTHER Calendar year of 2005: Station susceptible to short and long periods of down times; Cause(s): Weather conditions; Rain/Snow/Ice on dish; Power outage; VSAT communication difficulties; Other out of our control conditions Extended down times of 1 day or more enumerated here: DDD+HH:MM to DDD+HH:MM UTC --------- --------- 008+22:21 -- 012+00:04 016+18:30 -- 018+02:00 END **************************************************************************** DATA PROBLEM REPORT ASL2004:053 2004/05/13 ASL DCC Valerie Peyton ASL HKT IU 00/*HE 2004,134,07:01:00 2004,138,16:26:48 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The E component of the STS1 at HKT is pegged during this time period. Some earthquakes were still registered by this instrument, but the instrument response is incorrect because of the bad mass position. Data should only be used with great caution. END PROBLEM RESOLUTION REPORT ASL2004:053 2004/06/16 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION The HKT STS1 E was recentered at 2004,138,16:26:48. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2004:054 2004/05/18 ASL DCC Valerie Peyton ASL SBA IU */* 2004,136,18:09:00 2004,143,02:35:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 452 Timing IS in error, as clock is unlocked. The GPS clock at SBA is unlocked from the GPS timing standard. A big storm, bringing winds greater than 200 kph, managed to pull the cable out of the GPS antenna. The SBA station operator has added the GPS cable to his list of post-storm repairs. END PROBLEM RESOLUTION REPORT ASL2004:054 2004/05/24 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The SBA station operator was able to repair the GPS cable and return the GPS system to operational order. Timing quality returns to normal at 2004, 143, 02:35. END **************************************************************************** DATA PROBLEM REPORT ASL2004:055 2004/05/24 ASL DCC Tyler Storm ASL BILL IU 00/?HZ 2004,141,15:43:00 2004,148,15:30:00 Problem Description NOISE SEED COMMENT REFERENCE C 1850 Sensor has lost vacuum containment. BILL STS1 Z data have high levels of long-period noise due to a loss of vacuum in the bell jar containing the vertical STS-1 instrument. END PROBLEM RESOLUTION REPORT ASL2004:055 2004/11/04 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The BILL STS1 Z noise levels have calmed down. The station operator appears to have evacuated the bell jar and re-established vacuum. Data quality returns to normal at 2004, 148, 15:30. END **************************************************************************** DATA PROBLEM REPORT ASL2004:056 2004/05/26 ASL DCC Valerie Peyton ASL RCBR IU */* 2004,127,14:31:00 2004,169,11:57:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 450 Time Uncertain. The RCBR data acquisition system is generating messages which indicate the system is no longer capable of synchronizing timing across all channels. This means that, even though the system is receiving a clear signal and time stamp from the GPS system, channels may or may not have the same time stamp when they should. Time stamps should be considered useless until the problem can be fixed. END PROBLEM RESOLUTION REPORT ASL2004:056 2004/08/10 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The RCBR timing problem was solved by resetting the DA. Timing quality returns to normal at 2004, 169, 11:57. END **************************************************************************** DATA PROBLEM REPORT ASL2004:057 2004/06/02 ASL DCC Valerie Peyton ASL LVC IU 10/*HE 2004,023,05:01:00 2004,035,15:51:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. A local earthquake caused the E component of the CMG3-T at LVC to fall against one of its stops. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2004:057 2004/06/02 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The LVC CMG3-T was recentered at 2004, 035, 15:51. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2004:058 2004/06/17 ASL DCC Valerie Peyton ASL QSPA IU 20/* 30/* 2004,169,03:07:00 2004,169,05:35:00 Problem Description OTHER SEED COMMENT REFERENCE C 1836 Instrument maintenance. Tests may be in progress. The QSPA station operator was in the surface vault relevelling the STS2. Expect variable data quality on the STS1 (location code 30) and STS2 (location code 20) channels. The borehole instruments (location codes 00, 10, and 40) are unaffected. END PROBLEM RESOLUTION REPORT ASL2004:058 2004/06/17 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The QSPA station operator finished her work in the surface vault at 2004, 169 05:35. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2004:059 2004/06/23 ASL DCC Tyler Storm ASL TIXI IU 00/*HE 2004,168,23:06:00 2004,230,09:45:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The E component of the STS1 at TIXI is dead. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2004:059 2004/08/17 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The TIXI station operator relevelled the STS1 E component. Data quality returns to normal at 2004, 230, 09:45. END **************************************************************************** DATA PROBLEM REPORT ANSS2005:029 2005/07/22 ANSS DCC Mark Meremonte ANSS BMN LB ALL 2005,001,00:00:00 2006,001,00:00:00 Problem Description OTHER Calendar year of 2005: Station susceptible to short and long periods of down times; Cause(s): Weather conditions; Rain/Snow/Ice on dish; Power outage; VSAT communication difficulties; Other out of our control conditions Extended down times of 1 day or more enumerated here: DDD+HH:MM to DDD+HH:MM UTC --------- --------- 008+00:25 -- 013+17:16 087+17:08 -- 090+00:00 099+02:24 -- 100+22:01 END **************************************************************************** DATA PROBLEM REPORT ANSS2005:028 2005/07/22 ANSS DCC Mark Meremonte ANSS BLA US ALL 2005,001,00:00:00 2006,001,00:00:00 Problem Description OTHER Calendar year of 2005: Station susceptible to short and long periods of down times; Cause(s): Weather conditions; Rain/Snow/Ice on dish; Power outage; VSAT communication difficulties; Other out of our control conditions Extended down times of 1 day or more enumerated here: DDD+HH:MM to DDD+HH:MM UTC --------- --------- 015+12:30 -- 024+21:50 053+00:04 -- 066+21:37 END **************************************************************************** DATA PROBLEM REPORT ANSS2005:025 2005/07/05 ANSS DCC Mark Meremonte ANSS WUAZ US BH*, LH* 1998,132,00:00:00 2005,072,19:47:00 Problem Description OTHER SEED COMMENT REFERENCE S 2510 Intrinsic Quanterra UltraShear timing error Quanterra (Q680) timing error due to filter cascade; Information found in Table A Corrections at http://aslwww.cr.usgs.gov/Seismic_Data/timing.html. On 2005*072+19:47 GMT the Q680 was replaced by a Q330 whose filter cascade does not generate a timing error; In addition, the STS-2 HG was replaced by a STS-2 LG (standard). END **************************************************************************** DATA PROBLEM REPORT ANSS2005:024 2005/06/24 ANSS DCC Mark Meremonte ANSS NEW US ALL 1993,317,00:00:00 2005,103,22:20:00 Problem Description OTHER SEED COMMENT REFERENCE S 2510 Intrinsic Quanterra UltraShear timing error Quanterra (Q680) timing error due to filter cascade; Information found in Table A Corrections at http://aslwww.cr.usgs.gov/Seismic_Data/timing.html. At 2005*103+22:20 UTC new FIR filter delays were applied to the Q680 code. This effectively resolves timing error issue between BH* and derived LH*. END **************************************************************************** DATA PROBLEM REPORT ASL2004:050 2004/05/05 ASL DCC Valerie Peyton ASL ANMO IU 10/*HZ 2004,125,20:34:00 2004,126,14:17:00 Problem Description NOISE SEED COMMENT REFERENCE C 4507 Channel has excessively high noise levels. Something happened to the Z component of the CMG3-T-B at ANMO. Perhaps it was hit by lightning. Regardless, noise levels on this component are excessively high for all frequencies. The PSDs are 5 to 40dB too high, except at 2.7Hz. END PROBLEM RESOLUTION REPORT ASL2004:050 2004/05/05 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION An ASL field engineer was able to solve the noise problem on the ANMO CMG3-T-B Z component by locking, unlocking, and recentering the mass. Data quality returns to normal at 2004, 126, 14:17. END **************************************************************************** DATA PROBLEM REPORT ANSS2005:027 2005/07/19 ANSS DCC Mark Meremonte ANSS BINY US ALL 2005,001,00:00:00 2006,001,00:00:00 Problem Description OTHER Calendar year of 2005: Station susceptible to short and long periods of down times; Cause(s): Weather conditions; Rain/Snow/Ice on dish; Power outage; VSAT communication difficulties; Other out of our control conditions Extended down times of 1 day or more enumerated here: DDD+HH:MM to DDD+HH:MM UTC --------- --------- 024+22:23 -- 029+20:47 034+18:33 -- 036+14:33 059+21:49 -- 062+18:47 064+08:46 -- 066+22:35 067+08:35 -- 081+08:48 081+10:29 -- 084+23:29 087+12:20 -- 089+17:26 100+20:40 -- 103+20:26 108+17:03 -- 110+01:40 112+10:04 -- 116+19:33 119+07:28 -- 121+21:58 122+14:56 -- 125+19:34 127+03:09 -- 133+23:45 059+21:49 -- 062+18:47 064+08:46 -- 066+22:35 067+08:35 -- 081+08:48 END **************************************************************************** DATA PROBLEM REPORT ASL2004:051 2004/05/07 ASL DCC Valerie Peyton ASL JOHN IU */* 2004,127,22:48:00 2004,133,07:37:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. An ASL field engineer is on location at JOHN for station maintenance. Expect variable data quality and availability, as well as calibrations and other tests. END PROBLEM RESOLUTION REPORT ASL2004:051 2004/05/17 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The ASL field engineer left JOHN in excellent operational order. Data quality returns to normal at 2004, 133, 07:37. END **************************************************************************** DATA PROBLEM REPORT ANSS2005:026 2005/07/05 ANSS DCC Mark Meremonte ANSS WUAZ US ALL 2004,275,00:00:00 2005,047,00:52:00 Problem Description OTHER SEED COMMENT REFERENCE S 2507 Station down. WUAZ was down essentially this entire period shown above; There were a few short up times in a five day period from 2005 day 022 to day 027 but no long term continuous data. On day 047, the station was brought back online. END **************************************************************************** DATA PROBLEM REPORT ASL2004:052 2004/05/10 ASL DCC Valerie Peyton ASL BILL IU 00/*HN 2004,129,13:14:00 2004,149,17:22:00 Problem Description SPIKES SEED COMMENT REFERENCE C 4510 Channel has frequent spiking. The data from the N component of the STS1 at BILL contain large pulses. The period of the pulses varies from 1 to 2 hours. The amplitudes of the pulses are as high as 30db above normal background levels. END PROBLEM RESOLUTION REPORT ASL2004:052 2004/11/04 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The STS1 N at BILL stopped pulsing at 2004, 149, 17:22. The pulses disappeared as mysteriously as they appeared. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ANSS2005:021 2005/06/13 ANSS DCC Mark Meremonte ANSS BOZ US ALL 2004,275,00:00:00 2005,032,01:15:00 Problem Description OTHER SEED COMMENT REFERENCE S 2515 Data dropouts Problem: If VSAT communications are lost for 2 hours, then Watchdog sends a VSAT reset and every 24 hours thereafter; Becasue the power control box at this site was connected backwards, the resets were being applied to the Q730 and a 1 to several hour data gap occurred. Resolution: Configuration change on has resolved it. END **************************************************************************** DATA PROBLEM REPORT ANSS2005:020 2005/06/13 ANSS DCC Mark Meremonte ANSS BLA US ALL 2005,015,12:30:00 2005,024,21:50:00 Problem Description OTHER Station down due to lost of Comm link. END **************************************************************************** DATA PROBLEM REPORT ANSS2005:023 2005/06/14 ANSS DCC Mark Meremonte ANSS CBKS US BH*, LH* 1994,255,00:00:00 2005,102,20:52:00 Problem Description OTHER SEED COMMENT REFERENCE S 2510 Intrinsic Quanterra UltraShear timing error Quanterra (Q680) timing error due to filter cascade; Information found in Table A Corrections at http://aslww.cr.usgs.gov/Seismic_Data/timing.html. At 2005*103+20:52 UTC new FIR filter delays were applied to the Q680 code. This effectively resolves timing error issue between BH* and derived LH*. END **************************************************************************** DATA PROBLEM REPORT IDA2012:020 2012/09/27 IDA DCC Erik Klimczak IDA MBAR II LN*-00,EN*-00 2012,247,00:00:00 2012,247,00:00:00 Problem Description DEAD CHANNEL Data from the strong motion sensor at MBAR is non-seismic for reasons yet to be determined. END **************************************************************************** DATA PROBLEM REPORT IDA2012:021 2012/09/27 IDA DCC Erik Klimczak IDA AAK II *** 2012,258,00:00:00 2012,258,00:00:00 Problem Description OTHER IDA station AAK is down as of day 2012,258-10:05 due to power problems at the station. A replacement power inverter is being prepared to ship to the station. END PROBLEM RESOLUTION REPORT IDA2012:021 2012/10/30 IDA Erik Klimczak Description of Problem Resolution RESOLUTION IDA station AAK is back on-line as of day 2012,299-08:12 after the station operator replaced the Newmar power inverter and a power supply on the network switch. END **************************************************************************** DATA PROBLEM REPORT IDA2012:022 2012/09/27 IDA DCC Erik Klimczak IDA JTS II *** 2012,261,00:00:00 2012,268,00:00:00 Problem Description OTHER The GPS clocks at IDA station JTS were unlocked after they were damaged by lightning. The GPS clocks locked again after the station operator replaced the antennas. The timing for data from the JTS-10 digitizer is uncertain from day 2012,261-22:06 to 2012,268-19:06. END **************************************************************************** DATA PROBLEM REPORT IDA2012:023 2012/09/27 IDA DCC Erik Klimczak IDA TLY II *** 2012,260,00:00:00 2012,268,00:00:00 Problem Description OTHER IDA station TLY was down from day 2012,260-13:05 to 2012,268-07:47 for reasons yet to be determined. There are plans to upgrade the station to a Q330 system. END **************************************************************************** DATA PROBLEM REPORT IDA2012:024 2012/10/30 IDA DCC Erik Klimczak IDA ARU II *** 2012,291,00:00:00 2012,291,00:00:00 Problem Description OTHER IDA station ARU is down as of day 2012,291 due to problems with the digitizer and power to the station. There are plans to upgrade the station to a Q330 system. END **************************************************************************** DATA PROBLEM REPORT IDA2012:025 2012/12/07 IDA DCC Erik Klimczak IDA PALK II BH*-00,LH*-00 2012,317,00:00:00 2012,317,00:00:00 Problem Description OTHER All channels from the KS-54000 seismometer became non-seismic on day 2012,317-17:01 due to a loss of power downhole. A faulty sensor interface box is suspected. A replacement sensor interface box has been shipped to the station. END PROBLEM RESOLUTION REPORT IDA2012:025 2013/03/07 IDA Erik Klimczak Description of Problem Resolution RESOLUTION All channels from the KS-54000 seismometer have been restored as of day 2013,029-06:49 after the station operator replaced the seismometer interface box. END **************************************************************************** DATA PROBLEM REPORT IDA2012:026 2012/12/07 IDA DCC Erik Klimczak IDA ASCN II BHZ-00,LHZ-00 2012,325,00:00:00 2012,325,00:00:00 Problem Description OTHER The vertical channels from the KS-54000 became non-seismic on day 2012,325-23:24 for reasons yet to be determined. The vertical channels started showing a strange signal for about an hour a day beginning 2012,323 before becoming non-seismic. END **************************************************************************** DATA PROBLEM REPORT ASL2004:042 2004/04/12 ASL DCC Valerie Peyton ASL ANMO IU 00/*FZ 2002,191,17:17:00 2002,273,23:34:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The ANMO magnetometer was not functioning during this time period. Data are simply unusable digitizer noise. END PROBLEM RESOLUTION REPORT ASL2004:042 2004/04/12 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The ANMO magnetometer returned to operational order at 2002, 273, 23:34. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2004:043 2004/04/12 ASL DCC Valerie Peyton ASL ANMO IU 00/*FZ 2002,322,16:10:00 2003,014,18:17:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The ANMO magnetometer was not functioning during this time period. Data are simply unusable digitizer noise. END PROBLEM RESOLUTION REPORT ASL2004:043 2004/04/12 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The ANMO magnetometer returned to operational order at 2003, 014, 18:17. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2004:044 2004/04/13 ASL DCC Valerie Peyton ASL KMBO IU 00/*HZ 2004,104,18:43:00 2004,196,07:55:00 Problem Description OTHER SEED COMMENT REFERENCE C 4630 Response may be invalid. The STS1 Z at KMBO appears to have spontaneously put itself into 360 second mode. It appears that the instrument is in free period mode, and possible also in 20 second mode. The instrument response is corrupt from 0.1 Hz down on into all of the lower frequencies. SUPPLEMENT 2004, 112 There are times when the STS1 Z at KMBO corrects its own response, but then the response goes bad again. We will be sending a replacement feedback electronics box to fix the problem as soon as possible. END PROBLEM RESOLUTION REPORT ASL2004:044 2004/07/26 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The KMBO station operator replaced the STS1 Z feedback electronic box. The instrument response is correct, and data quality is normal once more, as of 2004, 196, 07:55. END **************************************************************************** DATA PROBLEM REPORT ASL2004:045 2004/04/14 ASL DCC Valerie Peyton ASL KBS IU 00/*HE 2004,105,01:26:00 2004,107,09:27:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The E component of the STS1 at KBS has fallen against one of its stops. A few earthquakes are partially visible for a couple of hours after the mass starts to fall. But after that, data are unuseable. END PROBLEM RESOLUTION REPORT ASL2004:045 2004/04/19 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The KBS station operator recentered the E component of the STS1. Data quality returns to normal at 2004, 107, 09:27. END **************************************************************************** DATA PROBLEM REPORT ASL2004:046 2004/04/28 ASL DCC Valerie Peyton ASL NWAO IU */* 2004,110,04:32:00 2004,202,04:58:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 454 Timing MAY be in error, as GPS system is not operating consistently. The GPS system at NWAO is not working properly right now. The VCO value is not moving, indicating that the GPS system is somehow not able to listen to the GPS satellite signal. The clock drift is not measureable, since there is no contact with the GPS satellites. As long as the system is not reset, timing in the data will be reasonably good. But since we have no GPS signal to keep the digitizer clock in line, data timing should be considered incorrect. We will be shipping a new timing system to NWAO as soon as possible. END PROBLEM RESOLUTION REPORT ASL2004:046 2004/08/11 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The NWAO station operator replaced the GPS timing system. Timing quality returns to normal at 2004, 202, 04:58. END **************************************************************************** DATA PROBLEM REPORT ASL2004:047 2004/05/03 ASL DCC Valerie Peyton ASL BILL IU 00/*HN 2004,123,11:34:00 2004,126,22:33:00 Problem Description SPIKES SEED COMMENT REFERENCE C 4510 Channel has frequent spiking. The data from the N component of the STS1 at BILL contain large pulses. The period of the pulses varies from 120 to 800 seconds. The amplitudes of the pulses are as high as 40db above normal background levels. END PROBLEM RESOLUTION REPORT ASL2004:047 2004/05/07 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The STS1 N at BILL stopped pulsing at 2004, 126, 22:33. The pulses disappeared as mysteriously as they appeared. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT IDA2003:002 2003/04/01 IDA DCC Peter Davis IDA SHEL II BHZ-00,LHZ-00,VHZ-00 2002,315,13:00:00 2003,061,00:00:00 Problem Description DEAD CHANNEL Due to an error within the DAS, the output of the KS54000 vertical sensor exceeded the input range of the digitizer during this period causing the output to clip at a constant value of 16777216 digital counts. END **************************************************************************** DATA PROBLEM REPORT ASL2004:048 2004/05/03 ASL DCC Valerie Peyton ASL CASY IU 10/*H* 2003,097,02:27:00 2003,230,07:12:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. All three components of the STS2 at CASY are pegged. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2004:048 2004/05/03 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The CASY station operator was able to recenter the STS2 at 2003, 230, 07:12. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT IDA2003:001 2003/01/13 IDA DCC Peter Davis IDA BRVK II S**-00,LN*-00,EN*-00 2002,279,00:00:00 2003,009,06:00:00 Problem Description DEAD CHANNEL The DAS DSP board failed on 2002,279 and was replaced on 2003,009. END **************************************************************************** DATA PROBLEM REPORT ASL2004:049 2004/05/04 ASL DCC Valerie Peyton ASL OTAV IU 00/*H* 2000,251,19:51:00 2000,251,19:51:00 Problem Description SPIKES SEED COMMENT REFERENCE C 4520 Channel has occasional spiking. All three components of the STS1 at OTAV exhibit intermittant low- frequency spiking. Sometimes the spiking is rather periodic, with periods varying from 10 minutes to a couple of hours. The source of the spiking has not been determined. Data between spiking episodes is of much higher quality. END **************************************************************************** DATA PROBLEM REPORT ANSS2005:039 2005/09/06 ANSS DCC Mark Meremonte ANSS HLID US ALL 2005,001,00:00:00 2006,001,00:00:00 Problem Description OTHER Calendar year of 2005: Station susceptible to short and long periods of down times; Cause(s): Weather conditions; Rain/Snow/Ice on dish; Power outage; VSAT communication difficulties; Other out of our control conditions Extended down times of 1 day or more enumerated here: DDD+HH:MM to DDD+HH:MM UTC --------- --------- 122+04:21 -- 162+16:22 END **************************************************************************** DATA PROBLEM REPORT ANSS2005:036 2005/09/06 ANSS DCC Mark Meremonte ANSS EYMN US ALL 2005,001,00:00:00 2006,001,00:00:00 Problem Description OTHER Calendar year of 2005: Station susceptible to short and long periods of down times; Cause(s): Weather conditions; Rain/Snow/Ice on dish; Power outage; VSAT communication difficulties; Other out of our control conditions Extended down times of 1 day or more enumerated here: DDD+HH:MM to DDD+HH:MM UTC --------- --------- 018+05:10 -- 032+18:40 END **************************************************************************** DATA PROBLEM REPORT ANSS2005:035 2005/09/02 ANSS DCC Mark Meremonte ANSS ERPA US ALL 2005,001,00:00:00 2006,001,00:00:00 Problem Description OTHER Calendar year of 2005: Station susceptible to short and long periods of down times; Cause(s): Weather conditions; Rain/Snow/Ice on dish; Power outage; VSAT communication difficulties; Other out of our control conditions Extended down times of 1 day or more enumerated here: DDD+HH:MM to DDD+HH:MM UTC --------- --------- 031+11:03 -- 039+16:49 131+01:12 -- 133+18:44 END **************************************************************************** DATA PROBLEM REPORT ANSS2005:038 2005/09/06 ANSS DCC Mark Meremonte ANSS GOGA US ALL 2005,001,00:00:00 2006,001,00:00:00 Problem Description OTHER Calendar year of 2005: Station susceptible to short and long periods of down times; Cause(s): Weather conditions; Rain/Snow/Ice on dish; Power outage; VSAT communication difficulties; Other out of our control conditions Extended down times of 1 day or more enumerated here: DDD+HH:MM to DDD+HH:MM UTC --------- --------- 029+18:00 -- 032+16:00 END **************************************************************************** DATA PROBLEM REPORT ASL2004:040 2004/04/07 ASL DCC Valerie Peyton ASL SNZO IU 10/*HE 2003,319,12:01:00 2006,026,12:45:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4630 Response may be invalid. The E component of the CMG3-T at SNZO is experiencing intermittant loss of half of its double-ended output. This means that at random times, 10dB of the component's response is lost. Data from these times should only be used with caution. The episodes of response loss are generally rather short, and to date have been observed to last no more than 2 hours. Most episodes are on the order of only several hundred seconds in length. Between response loss episodes, the component's response is entirely correct. We are investigating the problem and hope to have it resolved soon. END PROBLEM RESOLUTION REPORT ASL2004:040 2006/02/23 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The SNZO CMG3T seismometer and cable were replaced, fixing the problem with intermittant loss of half the double-ended output. We suspect the problem was caused by a bad connection somewhere in the cabling between the seismometer and the digitizer. Data quality returns to normal at 2006, 026, 12:45. END **************************************************************************** DATA PROBLEM REPORT ANSS2005:037 2005/09/06 ANSS DCC Mark Meremonte ANSS GOGA US ALL 2004,275,00:00:00 2005,001,00:00:00 Problem Description OTHER Calendar year of 2004: Station susceptible to short and long periods of down times; Cause(s): Weather conditions; Rain/Snow/Ice on dish; Power outage; VSAT communication difficulties; Other out of our control conditions Extended down times of 1 day or more enumerated here: DDD+HH:MM to DDD+HH:MM UTC --------- --------- 275+00:00 -- 351+00:00 END **************************************************************************** DATA PROBLEM REPORT ASL2004:041 2004/04/12 ASL DCC Valerie Peyton ASL TEIG IU 10/*H* 2004,101,00:19:00 2004,345,18:37:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. Some event hit the CMG3-T-B at TEIG at 2004, 101, 00:19. The event may have been a lightning strike. Regardless, after this event, all three components are producing identical data, and the PSDs are essentially flat at -125dB from 10Hz all the way down to 0.01Hz. The instrument appears to be dead. END PROBLEM RESOLUTION REPORT ASL2004:041 2004/07/16 ASL DCC Tyler Storm Description of Problem Resolution SUPPLEMENT The condition of the instrument has changed but there are still problems. The following is a time line of the recent changes: -13 July 22:00 UTC. It looks looks like several pulse calibrations were run. After that the data look somewhat normal. There are still some problems with the high-frequency end but the low-frequency data look good. Big improvement in overall data quality. -14 July 21:12 UTC. First we see digitizer noise, then possibly a reset, and finally the horizontals come back but the vertical is bad. -15 July 14:40 UTC. The vertical mass went from being pegged negative to being pegged positive. -25 July 16:34 UTC. The horizontal masses go bad in the coda of an earthquake. Earthquakes can still be seen in the horizontal data, but the response amplitude of both horizontals is roughly 5dB to 20dB too low from 0.3 Hz all the way down through the long periods. There also still is a high-frequency noise problem on the horizontals. Once more, all three channels are down. -08 Dec 17:37 UTC (2004, 343). The TEIG CMG3-T-B appears to have been locked up and pulled from the borehole for repair. Hopefully it will be working again soon! 2004, 345, 18:37 - The TEIG CMG3-T-B was removed and replaced with an operational CMG3-T-B. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT IDA2012:016 2012/09/07 IDA DCC Erik Klimczak IDA KWAJ II *** 2012,046,00:00:00 2012,046,00:00:00 Problem Description OTHER IDA station KWAJ is down due to a prolonged telemetry outage. Access to the station is restricted due to changing network configurations at the site. A station visit by an IDA engineer is planned. END PROBLEM RESOLUTION REPORT IDA2012:016 2012/09/27 IDA Erik Klimczak Description of Problem Resolution RESOLUTION IDA station KWAJ is back on-line as of day 2012,269-23:29 after an IDA engineer visited the station and replaced the station computers and firewall. END **************************************************************************** DATA PROBLEM REPORT IDA2012:017 2012/09/07 IDA DCC Erik Klimczak IDA SACV II *** 2012,208,00:00:00 2012,208,00:00:00 Problem Description OTHER IDA station SACV is down as of day 2012,208-20:41 due to power problems. Replacement batteries for the power system are being prepared to ship to the station. END PROBLEM RESOLUTION REPORT IDA2012:017 2013/03/07 IDA Erik Klimczak Description of Problem Resolution RESOLUTION IDA station SACV is back online as of day 2013,014 after an IDA engineer visited the station and upgraded it to a Quanterra Q330HR system. Sensors installed include KS-54000 and Trillium 120 posthole seismometers, an Episensor motion sensor, and a Setra microbarograph. END **************************************************************************** DATA PROBLEM REPORT ANSS2005:031 2005/07/27 ANSS DCC Mark Meremonte ANSS CBN US ALL 2005,001,00:00:00 2006,001,00:00:00 Problem Description OTHER Calendar year of 2005: Station susceptible to short and long periods of down times; Cause(s): Weather conditions; Rain/Snow/Ice on dish; Power outage; VSAT communication difficulties; Other out of our control conditions Extended down times of 1 day or more enumerated here: DDD+HH:MM to DDD+HH:MM UTC --------- --------- 027+11:38 -- 030+14:30 086+09:58 -- 087+17:29 099+06:27 -- 101+18:26 131+09:03 -- 133+20:42 END **************************************************************************** DATA PROBLEM REPORT IDA2012:018 2012/09/07 IDA DCC Erik Klimczak IDA NIL II *** 2012,195,00:00:00 2012,195,00:00:00 Problem Description OTHER The NIL-10 DAS is causing data gaps since day 2012,195-09:00. A replacement DAS has been shipped to the station. END PROBLEM RESOLUTION REPORT IDA2012:018 2012/09/27 IDA Erik Klimczak Description of Problem Resolution RESOLUTION Data is continuous after the station operator replaced the NIL-10 DAS with one shipped from UCSD. END **************************************************************************** DATA PROBLEM REPORT ANSS2005:034 2005/09/02 ANSS DCC Mark Meremonte ANSS DUG US ALL 2005,001,00:00:00 2006,001,00:00:00 Problem Description OTHER Calendar year of 2005: Station susceptible to short and long periods of down times; Cause(s): Weather conditions; Rain/Snow/Ice on dish; Power outage; VSAT communication difficulties; Other out of our control conditions Extended down times of 1 day or more enumerated here: DDD+HH:MM to DDD+HH:MM UTC --------- --------- 001+00:00 -- 041+21:36 064+01:44 -- 072+19:00 102+06:07 -- 103+20:07 104+22:11 -- 106+21:14 END **************************************************************************** DATA PROBLEM REPORT IDA2012:019 2012/09/27 IDA DCC Erik Klimczak IDA MBAR II *** 2012,239,00:00:00 2012,262,00:00:00 Problem Description OTHER The East-West channels from the CMG-3T seismometer were showing high background noise from day 2012,239-21:00 to 2012,262-21:22. Data quality improved when the masses for the CMG-3T seismometer were re-centered. END **************************************************************************** DATA PROBLEM REPORT ANSS2005:033 2005/09/02 ANSS DCC Mark Meremonte ANSS DUG US ALL 2004,275,00:00:00 2005,001,00:00:00 Problem Description OTHER Calendar year of 2004: Station susceptible to short and long periods of down times; Cause(s): Weather conditions; Rain/Snow/Ice on dish; Power outage; VSAT communication difficulties; Other out of our control conditions Extended down times of 1 day or more enumerated here: DDD+HH:MM to DDD+HH:MM UTC --------- --------- 327+05:45 -- 366+24:00 END **************************************************************************** DATA PROBLEM REPORT ANSS2005:030 2005/07/26 ANSS DCC Mark Meremonte ANSS BOZ US ALL 2005,001,00:00:00 2006,001,00:00:00 Problem Description OTHER Calendar year of 2005: Station susceptible to short and long periods of down times; Cause(s): Weather conditions; Rain/Snow/Ice on dish; Power outage; VSAT communication difficulties; Other out of our control conditions Extended down times of 1 day or more enumerated here: DDD+HH:MM to DDD+HH:MM UTC --------- --------- 053+13:49 -- 054+17:13 END **************************************************************************** DATA PROBLEM REPORT ASL2004:075 2004/07/28 ASL DCC Valerie Peyton ASL TRIS IU 20/*N* 2004,063,00:00:00 2004,210,13:28:00 Problem Description SPIKES SEED COMMENT REFERENCE C 4510 Channel has frequent spiking. All three channels of the FBA23 at TRIS appear to be dead. The instrument is recording large spikes and nothing else. SUPPLEMENT 2004, 344 Sometimes there actually are events visible between the spikes. The frequency of the spikes varies from 2 seconds to 2 hours. Data are useable, but only with caution. END **************************************************************************** DATA PROBLEM REPORT HRV1998:016 1998/03/25 Harvard WQC N.Maternovskaya ASL NRIL II LHE,BHE 1998,038,01:18:00 1998,038,01:18:00 Problem Description Dead channel Postscript file was placed into /pub/qc/qc_ps. END **************************************************************************** DATA PROBLEM REPORT ASL2004:076 2004/07/29 ASL DCC Tyler Storm ASL KIEV IU 00/*HZ 2004,163,01:50:00 2004,315,12:55:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. All channels from the KIEV vertical STS-1 are down. END PROBLEM RESOLUTION REPORT ASL2004:076 2006/01/04 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The problem with the KIEV STS1 Z component was fixed. Data quality returns to normal at 2004, 315, 12:55. END **************************************************************************** DATA PROBLEM REPORT ASL2004:077 2004/08/03 ASL DCC Valerie Peyton ASL ANMO IU 10/*H* 2004,216,00:36:00 2004,219,21:06:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. All three components of the ANMO CMG3T-B pegged simultaneously. Given the weather, the instrument was probably struck by lightning. Data are unusable. END PROBLEM RESOLUTION REPORT ASL2004:077 2004/08/09 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The ANMO CMG3T-B was removed from its borehole, repaired, and reinstalled. Data quality returns to normal at 2004, 219, 21:06. At that time a new orientation epoch was also added to IU/ANMO dataless for the CMG3T-B horizontal orientations. END **************************************************************************** DATA PROBLEM REPORT ASL2004:078 2004/08/09 ASL DCC Valerie Peyton ASL SAML IU */* 2004,215,17:14:00 2004,219,12:50:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. An ASL field engineer was on-location at SAML performing station maintenance. Expect highly variable data quality and availability, as well as tests and calibrations. END PROBLEM RESOLUTION REPORT ASL2004:078 2004/08/09 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The ASL field engineer left SAML in excellent operational condition. Data quality returns to normal at 2004, 219, 12:50. END **************************************************************************** DATA PROBLEM REPORT IDA2003:011 2003/06/23 IDA DCC Erik Klimczak IDA MSEY II BHZ-00 2003,122,04:33:00 2003,143,17:57:00 Problem Description DEAD CHANNEL BHZ-00 channels were saturated during this period. They were restored after the DAS was rebooted. END **************************************************************************** DATA PROBLEM REPORT ASL2004:079 2004/08/09 ASL DCC Valerie Peyton ASL MA2 IU 00/*HZ 2004,218,22:39:00 2004,219,10:32:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The station operator is working on relevelling the MA2 STS1 Z component during this time. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2004:079 2004/08/09 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Near the end of the work being done on the MA2 STS1 Z, station power failed. When the station comes back up, the STS1 Z data are back to normal quality. The problem is considered to be resolved as of 2004, 219, 10:32. END **************************************************************************** DATA PROBLEM REPORT IDA2003:010 2003/06/23 IDA DCC Erik Klimczak IDA MSEY II BHZ-00 2003,083,00:00:00 2003,114,19:22:00 Problem Description DEAD CHANNEL The KS-54000 vertical sensor was not in the operating range of the DAS following a power reset of the system. BHZ-00 channels were back at 2003,114-19:22 after the DAS was reset again. END **************************************************************************** DATA PROBLEM REPORT IDA2003:013 2003/06/23 IDA DCC Erik Klimczak IDA MBAR II *** 2002,319,00:00:00 2003,132,00:00:00 Problem Description OTHER The station was down due to theft of solar panels in the power system. A field engineer replaced the panels and restored data acquisition as of 2003,132. END **************************************************************************** DATA PROBLEM REPORT IDA2003:012 2003/06/23 IDA DCC Erik Klimczak IDA MBAR II BH1-10,BH2-10 2003,152,08:00:00 2003,152,08:00:00 Problem Description DEAD CHANNEL The CMG3-T seismometer horizontal channels are clipped, because the masses of the CMG3-T seismometer need to be recentered. END **************************************************************************** DATA PROBLEM REPORT ANSS2005:007 2005/03/25 ANSS DCC Mark Meremonte ANSS TPNV US BHZ,BHE,LHZ,LHE 2004,275,00:00:00 2004,275,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE C 2516 Systematic long period pulses DPR ANSS2004:001 reported about intermittent long period pulses; This DPR reports systematic single sided pulses on both N & E components with occurrences on Z ~ 1500 secs and on E ~2.2 hours END **************************************************************************** DATA PROBLEM REPORT IDA2003:004 2003/04/04 IDA DCC Peter Davis IDA JTS II *** 2002,298,17:27:00 2003,051,15:00:00 Problem Description DATA LOGGER PROBLEM The GPS interface board in the GPS clock failed at the beginning of the above period causing the clock to fail to generate a proper time string, so no data could be collected. When the GPS interface board was replaced, the clock's operation returned to normal. END **************************************************************************** DATA PROBLEM REPORT ANSS2005:006 2005/03/11 ANSS DCC Mark Meremonte ANSS SMY AT BH*, LH* 2004,291,00:00:00 2004,291,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE S 2515 Data dropouts LH*: Data dropouts ocurring every day at about 00:18 GMT and spanning about 1100 secs; BH*: Numerous data dropouts of varying lengths possibly making data unusable END **************************************************************************** DATA PROBLEM REPORT IDA2003:003 2003/04/01 IDA DCC Peter Davis IDA WRAB II *-10 2003,047,15:26:00 2003,055,01:44:00 Problem Description DEAD CHANNEL The masses of one or more components of the STS-2 sensor were saturated during this period. END **************************************************************************** DATA PROBLEM REPORT ANSS2005:009 2005/03/29 ANSS DCC Mark Meremonte ANSS JFWS US BHN,BHE,LHN,LHE 2004,275,00:00:00 2004,275,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE C 2511 Intermittent long period pulses Intermittent long period pulses; Pulses appear to be random and occur in groups of 2-3 at a time END **************************************************************************** DATA PROBLEM REPORT IDA2003:006 2003/06/23 IDA DCC Erik Klimczak IDA KURK II S*E-00 2003,019,00:00:00 2003,019,00:00:00 Problem Description DEAD CHANNEL The East-West component of the GS-13 sensor began malfunctioning on this day. END PROBLEM RESOLUTION REPORT IDA2003:006 2005/06/14 IDA Erik Klimczak Description of Problem Resolution RESOLUTION The East-West short period channels at IDA station KURK were restored when an IDA engineer replaced the GS-13 sensor. END **************************************************************************** DATA PROBLEM REPORT ANSS2005:008 2005/03/25 ANSS DCC Mark Meremonte ANSS TPNV US BHN,LHN 2004,275,00:00:00 2004,275,00:00:00 Problem Description OTHER N component appears to be erratic; not responding to a seismic signal but does respond to a Cal END **************************************************************************** DATA PROBLEM REPORT IDA2003:005 2003/06/23 IDA DCC Erik Klimczak IDA CMLA II *-10 2003,062,14:42:00 2003,147,11:58:00 Problem Description DEAD CHANNEL Data from the STS-2 sensor was out on 2003,062-14:42 and was restored on 2003,143 after a cable to the digitizer's AUX connector and Amplifier Filter Unit was reconnected. END **************************************************************************** DATA PROBLEM REPORT ASL2004:070 2004/07/23 ASL DCC Valerie Peyton ASL KONO IU */* 2004,180,10:27:00 2006,024,18:26:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 452 Timing IS in error, as clock is unlocked. The GPS system at KONO has lost contact with the GPS satellite constellation. An unrelated reset of the system not long after the GPS signal was lost has caused the Quanterra to start using the OS9 clock (internal timing) for time stamps in the data. Without a valid GPS signal, both time stamps and clock drift numbers are suspect. Data should only be used with caution. SUPPLEMENT 2005, 171 Several problems compounded the KONO clock problem. The first was that someone vandalized the GPS antenna cable, and severed it just below the GPS antenna. Since the antenna cable run is well over 1km, much of which was down a vertical shaft, and since there had been plans to move from the original cable run to a 3km run of fiber optic cable, this problem took rather a long time to resolve. The length and complexity of the cable run was exacerbated by the need to find proper drivers to move the 1ppm signal over the fiber, and further complicated by an incorrect VCO value in the DA. END PROBLEM RESOLUTION REPORT ASL2004:070 2005/06/20 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION After many a hoop was jumped through, the KONO clock problem was finally fixed. Timing quality returns to normal at 2005, 171, 20:16. SUPPLEMENT The KONO clock problems were finally completely resolved at 2006, 024, 18:26. Timing quality returns to normal at this time. Many thanks to Eivind, the KONO station operator, and ASL field engineers for their persistence in fixing this problem! END **************************************************************************** DATA PROBLEM REPORT ANSS2005:003 2005/01/04 ANSS DCC John McMillan ANSS HLID US BH*, LH* 1998,222,00:00:00 2005,103,21:00:00 Problem Description OTHER SEED COMMENT REFERENCE S 2510 Intrinsic Quanterra UltraShear timing error Quanterra (Q680) timing error due to filter cascade; Information found in Table A Corrections at http://aslwww.cr.usgs.gov/Seismic_Data/timing.html. At 2005*103+21:00 UTC new FIR filter delays were applied to the Q680 code. This effectively resolves timing error issue between BH* and derived LH*. END **************************************************************************** DATA PROBLEM REPORT IDA2003:008 2003/06/23 IDA DCC Erik Klimczak IDA MSVF II *** 2003,016,00:00:00 2003,156,00:00:00 Problem Description DATA LOGGER PROBLEM The station's main power supply failed. A replacement sent immediately failed upon installation. A second replacement sent 2003,121 was installed and problems with the GPS clock began. Station up, and data recording restored after the GPS clock was replaced on 2003,156. END **************************************************************************** DATA PROBLEM REPORT ASL2004:071 2004/07/23 ASL DCC Valerie Peyton ASL FURI IU */* 2004,188,23:37:00 2004,233,07:32:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 452 Timing IS in error, as clock is unlocked. The GPS system at FURI is unable to lock onto the GPS satellite signal. This started after the station came back up after a 4-day power-outage. Timing in the data is incorrect. A replacement GPS system has been shipped to the station. END PROBLEM RESOLUTION REPORT ASL2004:071 2004/10/05 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION FURI timing is good at 2004, 233, 07:32. END **************************************************************************** DATA PROBLEM REPORT ANSS2005:002 2005/01/04 ANSS DCC John McMillan ANSS BMN LB BHE, LHE 2004,286,20:40:00 2004,286,20:40:00 Problem Description SPIKES SEED COMMENT REFERENCE C 2512 Data spiky and possibly asymmetric. Data spikes at random intervals and amplitudes END **************************************************************************** DATA PROBLEM REPORT IDA2003:007 2003/06/23 IDA DCC Erik Klimczak IDA COCO II BHZ-00,LHZ-00,VHZ-00 2002,235,12:00:00 2002,235,12:00:00 Problem Description DEAD CHANNEL Vertical channels from the KS-54000 sensor have excessive noise, for reasons not yet determined. END **************************************************************************** DATA PROBLEM REPORT ASL2004:072 2004/07/28 ASL DCC Valerie Peyton ASL SDV IU */* 2004,190,13:15:00 2004,196,13:16:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. An ASL field engineer was on-location at SDV replacing the STS1 Z sensor and performing other tasks related to station maintenance. Expect highly variable data quality and availability, as well as tests and calibrations. END PROBLEM RESOLUTION REPORT ASL2004:072 2004/07/28 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION SDV station maintenance ended at 2004, 196, 13:16. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ANSS2005:005 2005/03/11 ANSS DCC Mark Meremonte ANSS SIT AT LH* 2004,291,00:00:00 2004,291,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE S 2515 Data dropouts Data dropouts occuring every day at about 00:25 GMT and spanning ~1500 secs END **************************************************************************** DATA PROBLEM REPORT HRV1998:019 1998/09/24 Harvard WQC N.Maternovskaya ASL KMBO IU BHZ BHN BHE 1998,141,05:34:00 1998,141,05:34:00 Problem Description DATA DROPOUTS Postscript file was placed into /pub/qc/qc_ps. END PROBLEM RESOLUTION REPORT HRV1998:019 2000/03/09 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION KMBO is a remote station, and the comm links at remote stations sometimes go down. For day 1998,141, it is apparent from the data that this was not a perfect day for the comm link. There are a number of 1-5sample data gaps; the largest data gap is 57 seconds. Unfortunately this particular gap is in BH? data, and coincides with the onset of an event. The comm link is currently working fine. No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT ASL2004:073 2004/07/28 ASL DCC Valerie Peyton ASL SDV IU 00/*HZ 2004,198,21:09:00 2004,201,15:14:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The Z component of the STS1 at SDV has fallen against one of its stops. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2004:073 2004/07/28 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The SDV station operator recentered the STS1 Z component. Data quality returns to normal at 2004, 201, 15:14. END **************************************************************************** DATA PROBLEM REPORT ANSS2005:004 2005/01/04 ANSS DCC John McMillan ANSS AMTX US BH*, LH* 2004,274,00:00:00 2005,104,16:04:00 Problem Description OTHER SEED COMMENT REFERENCE S 2510 Intrinsic Quanterra UltraShear timing error Quanterra (Q730) timing error due to filter cascade; Similar problem described in Table A Corrections at http://aslwww.cr.usgs.gov/Seicmic_Data/timing.html. At 2005*104+16:04 UTC new FIR filter delays were applied to the Q680 code. This effectively resolves timing error issue between BH* and derived LH*. END **************************************************************************** DATA PROBLEM REPORT HRV1998:018 1998/09/24 Harvard WQC N.Maternovskaya ASL KBS DW LH* BH* 1998,169,04:17:00 1998,169,04:17:00 Problem Description DATA DROPOUTS Postscript file was placed into /pub/qc/qc_ps. END PROBLEM RESOLUTION REPORT HRV1998:018 2000/03/09 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION KBS is a remote station, and at all remote stations there are times when the comm link goes down. On day 1998,169 it appears there was a short break in the comm link, resulting in the loss of up to 2hours of data for each data stream. It is unfortunate that this occurred during an event window. The comm link is currently working fine. No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT IDA2003:009 2003/06/23 IDA DCC Erik Klimczak IDA WRAB II *-10 2003,090,00:00:00 2003,113,00:00:00 Problem Description DEAD CHANNEL The masses of the STS-2 sensor drifted out of operating range during this period. Data streams returned to normal after the masses were recentered by the station operator. END **************************************************************************** DATA PROBLEM REPORT ASL2004:074 2004/07/28 ASL DCC Valerie Peyton ASL SJG IU */* 2004,197,15:58:00 2004,200,13:51:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. An ASL field engineer was on-location at SJG performing station maintenance. Expect highly variable data quality and availability, as well as tests and calibrations. END PROBLEM RESOLUTION REPORT ASL2004:074 2004/07/28 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION SJG station maintenance ended at 2004, 196, 13:16. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ANSS2005:001 2005/01/04 ANSS DCC John McMillan ANSS LTX US BH*, LH* 1993,035,00:00:00 2005,103,22:01:00 Problem Description OTHER SEED COMMENT REFERENCE S 2510 Intrinsic Quanterra UltraShear timing error Quanterra (Q680)timing error due to filter cascade; Information found in Table A Corrections at http://aslwww.cr.usgs.gov/Seismic_Data/timing.html. At 2005*103+22:01 UTC new FIR filter delays were applied to the Q680 code. This effectively resolves timing error issue between BH* and derived LH*. END **************************************************************************** DATA PROBLEM REPORT ASL2004:064 2004/06/28 ASL DCC Valerie Peyton ASL BILL IU 00/*HE 2004,178,13:41:00 2004,265,00:50:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The E STS1 at BILL has fallen against one of its stops. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2004:064 2004/11/04 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The BILL station operator recentered the STS1 E mass. Data quality returns to normal at 2004, 265, 00:50. END **************************************************************************** DATA PROBLEM REPORT ASL2004:065 2004/07/06 ASL DCC Tyler Storm ASL GUMO IU 10/*HE 10/*HN 2004,181,02:12:00 2004,182,15:15:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The horizontal data from the GUMO CMG3-T are unuseable during this time frame. END PROBLEM RESOLUTION REPORT ASL2004:065 2004/07/06 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION The GUMO CMG3-T horizontal data are back to normal after an instrument recenter at 2004,182,15:15. END **************************************************************************** DATA PROBLEM REPORT IDA2003:020 2003/08/21 IDA DCC Erik Klimczak IDA MSVF II *** 2003,189,00:00:00 2003,189,00:00:00 Problem Description DATA LOGGER PROBLEM The station is currently not acquiring data due to problems with the data logger ejecting tapes. END PROBLEM RESOLUTION REPORT IDA2003:020 2003/11/12 IDA Erik Klimczak Description of Problem Resolution RESOLUTION IDA station MSVF is back up after the station operator installed a replacement Auxiliary Recording System and DAT drive on 2003/11/04. END **************************************************************************** DATA PROBLEM REPORT ASL2004:066 2004/07/06 ASL DCC Valerie Peyton ASL TRIS IU 10/*HE 2004,063,00:00:00 2004,183,16:16:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4625 Invalid instrument response. The digitizer gain was set incorrectly on the TRIS 10/*HE (STS2) channel for this time period. This corrupted the output sensitivity for the data stream. END PROBLEM RESOLUTION REPORT ASL2004:066 2004/07/07 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The digitizer gain was set to the correct value at 2004, 183, 16:16. The TRIS 10/*HE data streams have correct sensitivity from this time forward. END **************************************************************************** DATA PROBLEM REPORT HRV1998:003 1998/01/06 Harvard WQC N.Maternovskaya ASL BILL IU LHE BHE 1997,229,20:11:00 1997,229,20:11:00 Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE C 4500 Channel has high noise background. Ew component pegged? Postscript file was placed into /pub/qc/qc_ps. END PROBLEM RESOLUTION REPORT HRV1998:003 2000/03/21 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Looking at the data from BILL on and around 1997,229 it is apparent that the N/S channel of the STS1 instrument is pegged (for full time span, please see ASL2000:069), and the E/W is displaying the characteristically enormously high noise background present on the horizontals at BILL. It is unfortunate, but this station is subject to a large amount of low frequency noise and has been since installation. Please also see ASL2000:076. END **************************************************************************** DATA PROBLEM REPORT ASL2004:067 2004/07/09 ASL DCC Valerie Peyton ASL MA2 IU */* 2004,009,02:53:00 2004,057,00:16:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 453 Timing MAY be in error, as the GPS antenna has poor sky visibility. The MA2 clock is having trouble staying locked on to the GPS timing signal. We believe this problem is being caused either by a degrading antenna cable, or poor sky view for the antenna. The station operator is attempting to fix the problem. Timing quality is quite variable and sometimes quite poor during this time. END PROBLEM RESOLUTION REPORT ASL2004:067 2004/07/09 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION MA2 clock quality improved at 2004, 057, 00:16. Timing quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT IDA2003:022 2003/08/21 IDA DCC Erik Klimczak IDA WRAB II *** 2003,190,00:00:00 2003,195,00:00:00 Problem Description OTHER The station was down temporarily and data was not acquired from 2003,190 to 2003,195 while maintenance, including installation of a new uninterruptible power supply with new batteries, and a new modem, was taking place. END **************************************************************************** DATA PROBLEM REPORT ASL2004:068 2004/07/16 ASL DCC Tyler Storm ASL HKT IU 00/?HE 2004,192,15:25:00 2004,197,19:22:00 Problem Description OTHER SEED COMMENT REFERENCE C 4410 Channel data quality is poor. The mass was moving toward the stop during this time frame. Data are useable but somewhat degraded. END PROBLEM RESOLUTION REPORT ASL2004:068 2004/07/16 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The HKT STS1 E mass was re-centered at 2004,197,19:22:00. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT IDA2003:021 2003/08/21 IDA DCC Erik Klimczak IDA TLY II BHN-00,LHN-00,VHN-00 1995,229,00:15:00 1995,229,00:15:00 Problem Description OTHER There is frequent spiking on the STS-1 north-south channels for reasons not yet understood. END **************************************************************************** DATA PROBLEM REPORT ASL2004:069 2004/07/20 ASL DCC Valerie Peyton ASL ULN IU */* 2004,167,06:21:00 2004,307,07:15:00 Problem Description OTHER SEED COMMENT REFERENCE S 452 Timing IS in error, as clock is unlocked. The GPS system at ULN has lost contact with the GSP satellite constellation. Timing is incorrect. A replacement GPS system has been shipped. END PROBLEM RESOLUTION REPORT ASL2004:069 2004/11/09 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The ULN station operator replaced the GPS system, and everything is finally working properly again. Timing quality returns to normal at 2004, 307, 07:15. END **************************************************************************** DATA PROBLEM REPORT IDA2003:024 2003/09/24 IDA DCC Erik Klimczak IDA KDAK II *** 2003,242,22:38:00 2003,246,14:13:00 Problem Description OTHER The station was down temporarily and data was not acquired from 2003,242 to 2003,246 due to a workstation shutdown. Data acquisition resumed after power to the workstation was restored. END **************************************************************************** DATA PROBLEM REPORT IDA2003:023 2003/09/24 IDA DCC Erik Klimczak IDA JTS II *** 2003,241,17:17:00 2003,262,13:14:00 Problem Description DATA LOGGER PROBLEM The station was down due to power inverter failure. A replacement was sent 2003,247, and data acquisition resumed on 262-13:14. END **************************************************************************** DATA PROBLEM REPORT ANSS2005:018 2005/05/05 ANSS DCC John McMillan ANSS WVOR US BH*, LH* 1994,173,00:00:00 1994,173,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE S 2510 Intrinsic Quanterra UltraShear timing error Intrinsic Quanterrs UltraShear timing error. Quanterra timing error due to filter cascade; Information found in Table A corrections at http://aslwww.cr.usgs.gov/Seismic_Data/timing.html END **************************************************************************** DATA PROBLEM REPORT IDA2003:015 2003/06/23 IDA DCC Erik Klimczak IDA CMLA II BHZ-00,LHZ-00,VHZ-00 2003,086,12:22:00 2003,100,22:00:00 Problem Description DEAD CHANNEL Data for the KS-54000 vertical channels were out during this period due to a faulty RT303 board in the digitizer. *HZ-00 data was restored after the RT303 board was replaced with the board from the BHE-00 channel by the station operator. END PROBLEM RESOLUTION REPORT IDA2003:015 2003/08/21 IDA Erik Klimczak Description of Problem Resolution BHE-00 data at CMLA was restored after the RT303 board was replaced by the station operator. END **************************************************************************** DATA PROBLEM REPORT ANSS2005:017 2005/04/26 ANSS DCC Mark Meremonte ANSS HAWA US ALL 2004,356,23:00:00 2005,076,21:34:00 Problem Description OTHER SEED COMMENT REFERENCE S 2507 Station down. Station down due to a component failure. END **************************************************************************** DATA PROBLEM REPORT IDA2003:014 2003/06/23 IDA DCC Erik Klimczak IDA AAK II *** 2003,153,00:00:00 2003,153,00:00:00 Problem Description DATA LOGGER PROBLEM The station is currently not acquiring data due to communication problems between the Data Acquisition System and the Station Processor. END PROBLEM RESOLUTION REPORT IDA2003:014 2003/11/12 IDA Erik Klimczak Description of Problem Resolution RESOLUTION IDA station AAK is back up after an IDA engineer replaced the station's Data Acquisition System,Station Processor, and GPS clock. END **************************************************************************** DATA PROBLEM REPORT IDA2003:017 2003/06/23 IDA DCC Erik Klimczak IDA CMLA II BHZ-00 2003,147,12:30:00 2003,150,23:29:00 Problem Description DEAD CHANNEL Data for the KS-54000 vertical channels were saturated during this period. After the digitizer was rebooted the BHZ channel returned to normal. END **************************************************************************** DATA PROBLEM REPORT ANSS2005:019 2005/06/06 ANSS DCC Mark Meremonte ANSS AMTX US ALL CHANNELS 2005,039,19:18:00 2005,049,23:52:00 Problem Description OTHER Seismometer is a STS-2: After a mass recenter, it appears the N-S component was stuck on the stops registering -12.5 volts. Consequently, all 3 channels were affected and resulted in rapid drift from a few several thousand counts to 2-3 million counts; Behavior ceased once two successive mass recenters were sent. END **************************************************************************** DATA PROBLEM REPORT IDA2003:016 2003/06/23 IDA DCC Erik Klimczak IDA CMLA II BHE-00 2003,062,14:48:00 2003,120,14:00:00 Problem Description DEAD CHANNEL Data for the KS-54000 east-west sensor was not recorded during this period until a new RT303 board could be sent. BHE-00 data was restored after the RT303 board was replaced by the station operator. END **************************************************************************** DATA PROBLEM REPORT ANSS2005:014 2005/04/04 ANSS DCC Mark Meremonte ANSS NATX US BH*,LH* 2004,134,00:00:00 2005,102,19:35:00 2005,102,19:35:00 Problem Description OTHER SEED COMMENT REFERENCE S 2510 Intrinsic Quanterra UltraShear timing error Quanterra (Q730) timing error due to filter cascade; Similar problem described in Table A Corrections at http://aslwww.cr.usgs.gov/Seismic_Data/timing.html. At 2005*102+19:35 UTC new FIR filter delays were applied to the Q730 code. This effectively resolves timing error issue between BH* and derived LH*. END **************************************************************************** DATA PROBLEM REPORT IDA2003:019 2003/07/24 IDA DCC Erik Klimczak IDA HOPE II BHN-00,LHN-00,VHN-00,VMZ 2003,197,00:00:00 2003,197,00:00:00 Problem Description DEAD CHANNEL Data for the STS-1 north-south and vertical channels are saturated following a reboot of the DAS. Engineering tests conducted 2003,199 suggest a problem with the STS-1 sensor. END **************************************************************************** DATA PROBLEM REPORT ASL2004:060 2004/06/23 ASL DCC Tyler Storm ASL POHA IU 00/*H* 2004,173,20:03:00 2004,173,20:03:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. All three channels of the 54000 at POHA went dead simultaneously. The cause of the problem is being investigated. END PROBLEM RESOLUTION REPORT ASL2004:060 2004/09/22 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION An ASL field team replaced the power board in the POHA 54000. This repaired the Z and 1 components. The 2 component is still down. For the full extent of this problem, please see ASL2004:092. END **************************************************************************** DATA PROBLEM REPORT ANSS2005:013 2005/04/04 ANSS DCC Mark Meremonte ANSS MNTX US BH*, LH* 2004,275,00:00:00 2004,348,19:35:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE S 2507 Station down. Station MNTX hit by lightning; Both Q730-NSN and STS-2 damaged; Consequently both Q730-NSN and STS-2 replaced; Grounding at sight enhanced for better protection. END **************************************************************************** DATA PROBLEM REPORT HRV1998:009 1998/03/02 Harvard WQC N.Maternovskaya ASL BRVK II LH*,BH* 1997,312,10:02:00 1997,312,10:02:00 Problem Description Clipping? Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1998:009 1998/07/08 IDA Peter Davis Description of Problem Resolution COMMENT These data are indeed clipped. This condition was discovered during routine quality control assessment at the IDA DCC. Accordingly, the SEED volume containing these data includes a channel comment noting the clipping. In addition, the corresponding low gain data, both BL* and LL*, were included with the same SEED volume. That SEED data was shipped to the DMC on 97/12/15 as tape IDA484. Therefore the unclipped low gain data should be available to all users. END **************************************************************************** DATA PROBLEM REPORT IDA2003:018 2003/06/23 IDA DCC Erik Klimczak IDA ASCN II BHZ-10 2003,069,08:43:00 2003,096,13:55:00 Problem Description DEAD CHANNEL Data for the KS-54000 vertical channels were saturated during this period. After the digitizer was rebooted the BHZ channel returned to normal. END **************************************************************************** DATA PROBLEM REPORT ASL2004:061 2004/06/28 ASL DCC Valerie Peyton ASL LSA IC */* 2004,176,02:22:00 2004,177,06:45:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. The LSA station operator was in the vault replacing the STS1 E and performing other maintenance tasks during this time. Expect variable data quality and availability. END PROBLEM RESOLUTION REPORT ASL2004:061 2004/06/28 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The LSA station operator finished his work at 2004, 177, 06:45. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ANSS2005:016 2005/04/14 ANSS DCC Mark Meremonte ANSS ERPA US BH*, LH* 2004,079,00:00:00 2005,102,19:12:00 Problem Description OTHER SEED COMMENT REFERENCE S 2510 Intrinsic Quanterra UltraShear timing error Quanterra (Q730) timing error due to filter cascade; Similar problem described in Table A Corrections at http://aslwww.cr.usgs.gov/Seismic_Data/Timing.html. At 2005*102+19:12 UTC new FIR filter delays were applied to the Q730 code. This effectively resolves timing error issue between BH* and derived LH*. END **************************************************************************** DATA PROBLEM REPORT HRV1998:008 1998/03/02 Harvard WQC N.Maternovskaya ASL AAK II LH*,BH* 1997,312,10:02:00 1997,312,10:02:00 Problem Description Clipping? Postscript file was placed into /pub/qc/qc_ps. END PROBLEM RESOLUTION REPORT HRV1998:008 1998/07/08 IDA Peter Davis Description of Problem Resolution COMMENT These data are indeed clipped. This condition was discovered during routine quality control assessment at the IDA DCC. Accordingly, the SEED volume containing these data includes a channel comment noting the clipping. In addition, the corresponding low gain data, both BL* and LL*, were included with the same SEED volume. That SEED data was shipped to the DMC on 97/12/15 as tape IDA484. Therefore the unclipped low gain data should be available to all users. END **************************************************************************** DATA PROBLEM REPORT ASL2004:062 2004/06/28 ASL DCC Valerie Peyton ASL BILL IU 00/*HE 2004,168,04:02:00 2004,168,23:59:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The E STS1 at BILL has fallen against one of its stops. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2004:062 2004/06/28 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The E mass came back to center of its own accord. Data quality returns to normal at 2004, 168, 23:59. END **************************************************************************** DATA PROBLEM REPORT ANSS2005:015 2005/04/13 ANSS DCC Mark Meremonte ANSS BMO US BH*, LH* 2004,328,00:00:00 2005,102,18:51:00 Problem Description OTHER SEED COMMENT REFERENCE S 2510 Intrinsic Quanterra UltraShear timing error Quanterra (Q730) timing error due to filter cascade; Similar problem described in Table A Corrections at http://aslwww.cr.usgs.gov/Seismic_Data/Timing.html. At 2005*102+18:51 UTC new FIR filter delays were applied to the Q730 code. This effectively resolves timing error issue between BH* and derived LH*. END **************************************************************************** DATA PROBLEM REPORT ASL2004:063 2004/06/28 ASL DCC Valerie Peyton ASL BILL IU 00/*HE 2004,176,13:26:00 2004,176,21:07:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The E STS1 at BILL has fallen against one of its stops. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2004:063 2004/06/28 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The BILL station operator recentered the E STS1. Data quality returns to normal at 2004, 176, 21:07. END **************************************************************************** DATA PROBLEM REPORT ANSS2005:010 2005/03/29 ANSS DCC John McMillan ANSS KSU1 US BH*, LH* 2003,148,00:00:00 2003,148,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE S 2517 Intrinsic timing error due to filter cascade Intrinsic timing error due to filter cascade. END **************************************************************************** DATA PROBLEM REPORT ANSS2005:012 2005/04/04 ANSS DCC Mark Meremonte ANSS MNTX US BH*, LH* 2004,092,06:00:00 2004,092,06:00:00 Problem Description OTHER SEED COMMENT REFERENCE S 2510 Intrinsic Quanterra UltraShear timing error Quanterra (Q730) timing error due to filter cascade; Similar problem described in Table A Corrections at http://aslwww.cr.usgs.gov/Seismic_Data/Timing_html END **************************************************************************** DATA PROBLEM REPORT ANSS2005:011 2005/03/29 ANSS DCC John McMillan ANSS KSU1 US BH*, LH* 2003,148,00:00:00 2003,148,00:00:00 Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE S 2518 Long period noise Repetitive high amplitude long period noise occuring at 24 hour intervals. END **************************************************************************** DATA PROBLEM REPORT DMCQC2014:0103 2014/02/14 IRIS DMC Gillian Sharer DMC Q55A TA ?HE 2013,297,11:34:00 2013,334,21:14:00 Problem Description INVALID RESPONSE On 2013.297 11:34 UTC, TA.Q55A.?HE had a reduction in amplitudes of about 50% along with a dc offset change of ~2500 counts. END PROBLEM RESOLUTION REPORT DMCQC2014:0103 2014/02/14 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION TA.Q55A resumed recording with normal amplitudes after the Q330 digitizer was replaced on 2013.334. END **************************************************************************** DATA PROBLEM REPORT DMCQC2014:0105 2014/03/07 IRIS DMC Gillian Sharer DMC P58A TA ?HZ 2013,346,22:26:00 2014,003,16:00:00 Problem Description LOW FREQUENCY NOISE TA.P58A.?HZ experienced a sudden onset of sensor noise on Dec. 12, 2013 22:26 UTC. By Dec. 27, 2013 the noise amplitude effectively rendered the station incapable of recording seismic energy. END PROBLEM RESOLUTION REPORT DMCQC2014:0105 2014/03/07 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The sensor masses were remotely locked on 2014.003 01:47 UTC and then unlocked at 15:38 UTC. After that, P58A resumed recording normal seismic data. END **************************************************************************** DATA PROBLEM REPORT DMCQC2014:0104 2014/03/07 IRIS DMC Gillian Sharer DMC D46A TA ?HZ 2013,302,17:30:00 2014,031,15:15:00 Problem Description INVALID RESPONSE Starting on Oct. 29 2013, TA.D46A.?HZ has had recurrent problems with its differential output. The dc offset shifts by ~2500 counts and its amplitudes are reduced by approximately 50%. Time periods where the amplitudes are reduced are: 2013.302 ~17:30 - 2013.306 00:28 UTC 2013.308 ~14:05 - 2013.313 13:11 2013.315 ~19:53 - 2013.317 15:00 2013.332 ~12:00 - 2013.332 14:00 2013.333 ~08:15 - 2013.334 04:00 2013.334 ~10:00 - 2013.334 22:00 2013.335 ~07:30 - 2013.336 06:30 2014.015 ~15:50 - 2014.017 11:27 (start time unknown; the data came back from a telemetry outage as half amplitude) 2014.018 ~08:56 - 2014.020 19:25 2014.020 ~23:35 - 2014.031 15:15 Amplitudes may be suspect at other times as well. END **************************************************************************** DATA PROBLEM REPORT DMCQC2014:0107 2014/03/07 IRIS DMC Gillian Sharer DMC 344B N4 * 2014,051,17:11:00 2014,054,20:50:00 Problem Description INCORRECT TIME On Feb. 20 2014, N4.344B lost its GPS receiver. The last clock lock was at 2014.051 17:11 UTC. END PROBLEM RESOLUTION REPORT DMCQC2014:0107 2014/03/07 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION N4.344B regained a GPS lock on Feb 23 20:50 UTC after a service visit to replace the digitizer. END **************************************************************************** DATA PROBLEM REPORT DMCQC2014:0106 2014/03/07 IRIS DMC Gillian Sharer DMC P58A TA ?HZ 2014,017,18:00:00 2014,024,15:45:00 Problem Description INVALID RESPONSE After a sensor swap on Jan 17 2014, P58A recorded digitizer noise until 19:30 UTC. Following that, the station had a differential output problem resulting in reduced amplitudes (~50%). END PROBLEM RESOLUTION REPORT DMCQC2014:0106 2014/03/07 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The issue spontaneously resolved on Jan. 24, 2014 15:45 UTC when the station began recording normal amplitudes. END **************************************************************************** DATA PROBLEM REPORT DMCQC2014:0109 2014/06/26 IRIS DMC Gillian Sharer DMC E50A TA * 2013,357,15:13:00 2014,127,16:20:00 Problem Description DEAD CHANNEL TA.E50A stopped recording seismic energy on Dec. 23, 2013 15:13 UTC and started returning only digitizer noise on Dec. 24, 2013 15:34 UTC. END PROBLEM RESOLUTION REPORT DMCQC2014:0109 2014/06/26 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION TA.E50A resumed recording seismic data on May 7, 2014 16:20 UTC after the Q330 digitizer was replaced. END **************************************************************************** DATA PROBLEM REPORT DMCQC2014:0108 2014/07/18 IRIS DMC Gillian Sharer DMC W50A TA * 2013,331,06:13:00 2014,026,20:00:00 Problem Description OTHER TA.W50A stopped responding to mass recenter commands. From 2013.331 to 2014.026, VM1 drifted from -5V to -7V and the data record has multiple spikes from failed mass recenter attempts. END PROBLEM RESOLUTION REPORT DMCQC2014:0108 2014/07/18 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION On 2014.025 ~22:40 UTC, an attempt to replace the sensor failed when the new sensor also would not recenter. VM1 stayed at -10V. The replacement sensor was pulled on 2014.026 ~20:00 UTC. There was no sensor at the station until 2014.032 20:00 UTC. END **************************************************************************** DATA PROBLEM REPORT ASL2004:097 2004/09/27 ASL DCC Valerie Peyton ASL INCN IU 00/*H* 2004,263,04:42:00 2004,268,09:10:00 Problem Description SPIKES SEED COMMENT REFERENCE C 4510 Channel has frequent spiking. All three components of the STS1 at INCN are experience coherent spiking during this time. The source of the spiking potentially is a pump used to keep the seismometer pit dry. END PROBLEM RESOLUTION REPORT ASL2004:097 2004/09/27 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The spiking on the STS1 channels at INCN stopped after the station operator unplugged the STS1s from their feedback electronics boxes and plugged them back in again. Data quality returns to normal at 2004, 268, 09:10. END **************************************************************************** DATA PROBLEM REPORT ASL2004:098 2004/10/01 ASL DCC Tyler Storm ASL KEV IU 00/?HZ 2004,226,08:00:00 2004,297,08:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. All channels from the vertical STS-1 are dead. END PROBLEM RESOLUTION REPORT ASL2004:098 2005/01/13 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION Data from the vertical STS-1 are back to normal at 2004,297,08:00:00. END **************************************************************************** DATA PROBLEM REPORT IDA2003:031 2003/11/12 IDA DCC Erik Klimczak IDA CMLA II *** 2003,260,18:13:00 2003,260,18:13:00 Problem Description DATA LOGGER PROBLEM Station is down due to problems with the DAS. The station operator reports replacing a surge protector which was found damaged at the phone line, after which he cycled power. However, the ARS indicates there is no data from the DAS. Replacement XCOM and COMM circuit boards for the DAS were sent and arrived on 2003.11.11. END PROBLEM RESOLUTION REPORT IDA2003:031 2004/02/12 IDA Erik Klimczak Description of Problem Resolution RESOLUTION IDA station CMLA is back up as of 2004:020-18:18 after an IDA engineer replaced the station's Power Supply, an RT303 card in the DAS, the DAT drive, and the station's modem. END **************************************************************************** DATA PROBLEM REPORT ASL2004:099 2004/10/04 ASL DCC Valerie Peyton ASL SDV IU */* 2004,278,00:33:00 2004,278,13:38:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 454 Timing MAY be in error, as GPS system is not operating consistently. The GPS system at SDV is operating inconsistently. Timing quality cannot be guaranteed during this time. END PROBLEM RESOLUTION REPORT ASL2004:099 2004/11/08 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The SDV GPS system recovered from whatever was bothering it. Timing quality returns to normal at 2004, 278, 13:38. END **************************************************************************** DATA PROBLEM REPORT IDA2003:030 2003/09/24 IDA DCC Erik Klimczak IDA NNA II *** 2003,023,01:14:00 2003,228,18:19:00 Problem Description OTHER The station was down due to power supply failure. The station became operable again after a new power supply board and tape drive were installed. The station operator has also reported that the telemetry relay station was vandalized, so telemetry remains down. END **************************************************************************** DATA PROBLEM REPORT IDA2003:033 2003/11/12 IDA DCC Erik Klimczak IDA JTS II BHZ-00,LHZ-00,VHZ-00 2003,285,00:00:00 2003,302,15:00:00 Problem Description DATA LOGGER PROBLEM There were frequent data gaps during this period due to inconsistent timing of the datalogger's internal clock, caused by a faulty RT303 board. The timing problems were resolved after the station operator removed the RT303 board for the STS-1 sensor's vertical channels. The vertical channels will be out until a replacement RT303 board is installed. END **************************************************************************** DATA PROBLEM REPORT IDA2003:032 2003/11/12 IDA DCC Erik Klimczak IDA MSEY II BHZ-00,LHZ-00,VHZ-00 2003,198,13:54:2003.322 2003,198,13:54:2003.322 Problem Description DEAD CHANNEL Vertical channels from the KS-54000 sensor are clipped. The station operator reset the DAS, however, the vertical channels remain clipped. The station operator has been requested to replace the RT303 board for the Vertical channels with the RT303 board from the North-South channels. END PROBLEM RESOLUTION REPORT IDA2003:032 2003/12/23 IDA Erik Klimczak Description of Problem Resolution RESOLUTION Vertical channels from the KS-54000 sensor at MSEY are back on scale after the station operator swapped RT303 boards from the channel 1 (BHN-00, LHN-00, VHN-00) slot in the digitizer to the channel 0 (BHZ-00, LHZ-00, VHZ-00) slot. Vertical channel data restored as of 2003:322-05:56 (2003/11/18). END **************************************************************************** DATA PROBLEM REPORT IDA2003:035 2003/12/23 IDA DCC Erik Klimczak IDA SUR II *** 2003,342,00:00:00 2003,351,00:00:00 Problem Description DATA LOGGER PROBLEM The station was down due to problems with the DAS caused by a faulty RT303 board for the digitizers north-south channels. The station became operational again after the station operator removed the faulty RT303 board. END **************************************************************************** DATA PROBLEM REPORT IDA2003:034 2003/12/23 IDA DCC Erik Klimczak IDA SACV II *** 2003,331,17:09:00 2004,071,15:39:00 Problem Description DATA LOGGER PROBLEM The station is down due to problems with the DAS, a faulty RT303 board, and external clock. After the DAS was rebooted on 2003/11/27, there were several error messages and then communication to the DAS was lost. END PROBLEM RESOLUTION REPORT IDA2003:034 2004/03/12 IDA Erik Klimczak Description of Problem Resolution RESOLUTION IDA station SACV is back up as of 2004,071-15:39, after an IDA engineer reconfigured the connections between the DAS, station processor, and GPS clock. END **************************************************************************** DATA PROBLEM REPORT IDA2003:026 2003/09/24 IDA DCC Erik Klimczak IDA MBAR II *** 2003,195,10:19:00 2003,195,10:19:00 Problem Description DATA LOGGER PROBLEM The station is down. The station operator reports no data from DAS and no clock on 2003,246. The last telemetered data from the station was on 2003,195. END **************************************************************************** DATA PROBLEM REPORT IDA2003:025 2003/09/24 IDA DCC Erik Klimczak IDA KURK II *** 2003,211,04:59:00 2003,211,04:59:00 Problem Description DATA LOGGER PROBLEM The station is down due to main power supply failure. A replacement was sent 2003,247. END PROBLEM RESOLUTION REPORT IDA2003:025 2003/12/23 IDA Erik Klimczak Description of Problem Resolution RESOLUTION IDA station KURK is back up as of 2003/12/05, after an IDA engineer replaced the stations power supply, and XCOM board in the digitizer. END **************************************************************************** DATA PROBLEM REPORT ASL2004:090 2004/09/17 ASL DCC Valerie Peyton ASL FURI IU 00/*H* 2004,211,13:01:00 2004,226,11:15:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. All three components of the STS1 at FURI are dead during this time frame. Even where the channels appear to be producing data, looking at the PSDs indicates that the channels are malfunctioning. END PROBLEM RESOLUTION REPORT ASL2004:090 2004/09/17 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The FURI digitizer stopped acquiring the STS1 channels at 2004, 226, 11:15. Since no data are available, the problem has disappeared. SUPPLEMENT STS-1 data (00 location code) are back to normal at 2004,267,11:37:00. END **************************************************************************** DATA PROBLEM REPORT IDA2003:028 2003/09/24 IDA DCC Erik Klimczak IDA TLY II *** 2003,252,00:00:00 2003,252,00:00:00 Problem Description DATA LOGGER PROBLEM The station is down due to failure of the GPS clock. END **************************************************************************** DATA PROBLEM REPORT ASL2004:091 2004/09/21 ASL DCC Valerie Peyton ASL POHA IU */* 2004,265,03:06:00 2004,266,06:11:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. An ASL field team is on-site at POHA performing station maintenance. Expect variable data availability and quality, tests, and calibrations. END PROBLEM RESOLUTION REPORT ASL2004:091 2004/09/22 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The ASL field team left POHA at 2004, 266, 06:11. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT IDA2003:027 2003/09/24 IDA DCC Erik Klimczak IDA PFO II *** 2003,235,23:47:00 2003,239,12:19:00 Problem Description OTHER The station was down temporarily when the network connection to the station's digitizer was lost. The station became operational again after an IDA engineer replaced a bad ethernet switch on 2003,239. END **************************************************************************** DATA PROBLEM REPORT ASL2004:092 2004/09/22 ASL DCC Valerie Peyton ASL POHA IU 00/*H2 2004,266,05:50:00 2004,320,21:35:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4625 Invalid instrument response. The 2 component of the 54000 at POHA is not operating correctly. The response of this channel is incorrect, and the data are not useable. END PROBLEM RESOLUTION REPORT ASL2004:092 2004/11/19 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The 2 component of the 54000 at POHA has not been repaired, but rather has now failed completely. During a maintenance visit, the entire POHA 54000 failed in a manner not repairable on site. For the full time span of this problem, please see ASL2004:120. END **************************************************************************** DATA PROBLEM REPORT ASL2004:093 2004/09/23 ASL DCC Valerie Peyton ASL RAO IU */* 2004,235,23:00:00 2004,242,21:42:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. An ASL field team was on location at RAO installing the station during this time frame. Expect variable data quality and availability, as well as calibrations and other tests. END PROBLEM RESOLUTION REPORT ASL2004:093 2004/09/23 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Installation of RAO ended at 2004, 242, 21:42. Data quality returns to normal at this time. RAO is an island site with a high volume of background noise. However, it also sits over the Kermadec trench and has excellent resolution of local events. It's capacity for teleseismic events is looking quite promising. END **************************************************************************** DATA PROBLEM REPORT IDA2003:029 2003/09/24 IDA DCC Erik Klimczak IDA ASCN II *** 2003,195,13:55:00 2003,195,13:55:00 Problem Description DATA LOGGER PROBLEM The station is down due to problems with the DAS. A malfunctioning RT303 card in the DAS is causing malformed packets to be written. END PROBLEM RESOLUTION REPORT IDA2003:029 2003/12/23 IDA Erik Klimczak Description of Problem Resolution RESOLUTION IDA station ASCN back up as of 2003/11/09. The data acquisition system has been upgraded to a MK8 system. Additional sensors have been added including CMG-3T and FBA-23 seismometers and a Paroscientific microbarograph. END **************************************************************************** DATA PROBLEM REPORT ASL2004:094 2004/09/24 ASL DCC Tyler Storm ASL WVT IU * 2004,186,00:00:00 2004,186,00:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. All channels from the STS-1 instruments are dead. END PROBLEM RESOLUTION REPORT ASL2004:094 2004/09/24 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION Data are back to normal. END **************************************************************************** DATA PROBLEM REPORT ASL2004:095 2004/09/24 ASL DCC Valerie Peyton ASL INCN IU */* 2004,268,06:30:00 2004,268,08:57:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. The INCN station operator was performing a test during this time. The objective of the test was to try and determine the source of a newly-developed spiking problem on the STS1 instruments. Data quality was severly compromised by the test. END PROBLEM RESOLUTION REPORT ASL2004:095 2004/09/24 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The test at INCN ended at 2004, 268, 08:57. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2004:096 2004/09/24 ASL DCC Valerie Peyton ASL POHA IU 10/LHN 2004,265,22:48:00 2004,282,22:40:00 Problem Description OTHER SEED COMMENT REFERENCE C 4320 This channel contains east-west data. By a sad "fat-fingering" of fate, the 10/LHN recorded at POHA is actually 10/LHE data during this time period. The 10/BHN and 10/HHN data are recording N data. The 10/LHN data, however, was accidentally set up in the software to be derived from the 10/MHE channel instead of from the 10/MHN channel and is consequently recording E data. A replacement hard drive with the correct software has been FedExed to the station and hopefully will be installed swiftly. END PROBLEM RESOLUTION REPORT ASL2004:096 2004/10/13 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The new POHA hard drive was installed, and the 10/LHN channel is once more recording 10/LHN data as of 2004, 282, 22:40. END **************************************************************************** DATA PROBLEM REPORT DMCQC2014:0114 2014/06/30 IRIS DMC Gillian Sharer DMC I53A TA ?HZ 2014,100,11:43:00 2014,170,16:00:00 Problem Description INVALID RESPONSE On April 10, 2014 11:43 UTC, TA.I53A.?HZ suffered a sudden loss of differential output. Its amplitudes were reduced by approximately 50% following a dc offset shift of ~3000 counts. END PROBLEM RESOLUTION REPORT DMCQC2014:0114 2014/06/30 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION Normal amplitudes were restored after the sensor was replaced on June 19 ~16:00 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2014:0113 2014/04/10 IRIS DMC Gillian Sharer DMC I53A TA ?HZ 2012,333,00:00:00 2012,357,17:00:00 Problem Description INVALID RESPONS From station installation to 2012.357 17:00 UTC, I53A.?HZ had an apparent differential output issue resulting in lower than expected amplitudes. END PROBLEM RESOLUTION REPORT DMCQC2014:0113 2014/04/10 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The problem was resolved following a digitizer reboot, after which normal amplitudes began to be recorded. END **************************************************************************** DATA PROBLEM REPORT DMCQC2014:0116 2014/06/26 IRIS DMC Gillian Sharer DMC 250A N4 * 2014,128,02:56:00 2014,141,17:35:00 Problem Description DEAD CHANNEL N4.250A started showing occasional spiky behavior on 2014.128 02:56 UTC. On 2014.131 13:27 UTC, 250A suddenly stopped recording accurate seismic data and the dc offset for the Z channel dropped to the millions of counts as VM2 rapidly came up against the stops. VM2 came off the stops on 2014.133 03:01 UTC, but 250A continued to record non-seismic noise. END PROBLEM RESOLUTION REPORT DMCQC2014:0116 2014/06/26 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The sensor was replaced on 2014.141 17:35 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2014:0115 2014/06/26 IRIS DMC Gillian Sharer DMC 250A TA * 2013,168,07:40:00 2013,304,12:20:00 Problem Description OTHER During this time period, TA.250A experienced multiple instances of ratty noise, characterized by spikes and short sharp changes in dc offset. This may be the result of corrosion. Each instance of noise lasts for hours to days at a time before returning to normal with the most prominent episodes occurring from ~: 2013.168 07:40-2013.189 08:45 2013.210 07:05-2013.212 15:00 2013.251 22:30-2013.252 14:30 2013.291 23:00-2013.295 00:45 2013.300 19:15-2013.304 12:20 END **************************************************************************** DATA PROBLEM REPORT DMCQC2014:0118 2014/07/10 IRIS DMC Gillian Sharer DMC TUQ CI * 2014,131,18:51:00 2014,184,17:00:00 Problem Description DATA LOGGER PROBLEM From May 11-July 3, the CI.TUQ digitizer was rebooting every ~18 minutes with only a few instances of more continuous data. END PROBLEM RESOLUTION REPORT DMCQC2014:0118 2014/07/10 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION CI.TUQ resumed normal operations after its failing battery was replaced. END **************************************************************************** DATA PROBLEM REPORT DMCQC2014:0117 2014/06/26 IRIS DMC Gillian Sharer DMC G60A TA * 2014,130,01:16:00 2014,135,21:30:00 Problem Description OTHER On May 10 2014 01:16 UTC, TA.G60A stopped responding to mass recanters. VM1 hit the stops on May 11 06:29 UTC and the seismic data during this time period is suspect. END PROBLEM RESOLUTION REPORT DMCQC2014:0117 2014/06/26 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION TA.G60A resumed recording accurate seismic data after the sensor was replaced on May 15 2014 21:30 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2014:0119 2014/06/26 IRIS DMC Gillian Sharer DMC H53A TA * 2014,129,19:52:00 2014,167,22:15:00 Problem Description INCORRECT TIME On May 9 2014 19:52 UTC, TA.H53A lost it's GPS clock lock. There is the possibility of clock drift during this time period. END PROBLEM RESOLUTION REPORT DMCQC2014:0119 2014/06/26 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The GPS cable had become disconnected. Clock lock was restored on June 16 2014 22:15 UTC after a service visit. END **************************************************************************** DATA PROBLEM REPORT ASL2004:086 2004/08/27 ASL DCC Valerie Peyton ASL LVC IU 10/*H* 2004,240,11:38:00 2004,268,21:23:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. All three channels of the CMG3T at LVC have gone down simultaneously. Loss of these data streams appears to be coincident with an electrical transient. Since the mass position data for this instrument was unaffected by the transient, it looks like there is a problem with the board which digitizes the CMG3T data. At this point, it looks like the instrument survived whatever happened, even though the data streams did not. We will try to fix the problem as soon as possible. END PROBLEM RESOLUTION REPORT ASL2004:086 2004/10/14 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The LVC station operator replaced the faulty digitizer boards which had caused the CMG3T channels to go down. Data quality returns to normal at 2004, 268, 21:23. END **************************************************************************** DATA PROBLEM REPORT ASL2004:087 2004/09/01 ASL DCC Valerie Peyton ASL GUMO IU 10/*H* 2004,245,01:47:00 2004,245,07:31:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. All three components of the CMG3T at GUMO pegged simultaneously. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2004:087 2004/09/01 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The GUMO station operator recentered the CMG3T. Data quality returns to normal at 2004, 245, 07:31. END **************************************************************************** DATA PROBLEM REPORT ASL2004:088 2004/09/16 ASL DCC Valerie Peyton ASL KONO IU 10/*HN 10/*HE 2004,259,16:13:00 2004,281,14:24:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. Both horizontal components of the CMG3T at KONO have fallen against their stops. Data are not useable. END **************************************************************************** DATA PROBLEM REPORT ASL2004:089 2004/09/17 ASL DCC Valerie Peyton ASL MDJ IC */* 2004,228,20:13:00 2004,229,17:50:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 454 Timing MAY be in error, as GPS system is not operating consistently. The GPS system at MDJ was not working properly during this time frame. Timing quality in the data should be considered suspect. END PROBLEM RESOLUTION REPORT ASL2004:089 2004/09/17 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The MDJ GPS system problems ended at 2004, 229, 17:50. Data timing quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2004:080 2004/08/10 ASL DCC Tyler Storm ASL FURI IU 10/?HN, 10/?HE 2004,201,10:30:00 2004,210,17:52:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The horizontal data from the CMG3-T are unuseable. END PROBLEM RESOLUTION REPORT ASL2004:080 2004/08/30 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION Remote reset fixed the problem. END **************************************************************************** DATA PROBLEM REPORT ASL2004:081 2004/08/10 ASL DCC Valerie Peyton ASL RCBR IU */* 2004,223,13:50:00 2004,224,13:47:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. An ASL field engineer is at RCBR for station maintenance. Expect variable data quality and availability, as well as calibrations and tests. END PROBLEM RESOLUTION REPORT ASL2004:081 2004/08/12 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The ASL field engineer left RCBR in excellent condition at 2004, 224, 13:47. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2004:082 2004/08/10 ASL DCC Valerie Peyton ASL RCBR IU */* 2004,196,13:30:00 2004,204,17:50:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. An ASL field engineer is at RCBR for station maintenance. Expect variable data quality and availability, as well as calibrations and tests. END PROBLEM RESOLUTION REPORT ASL2004:082 2004/08/10 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The ASL field engineer left RCBR at 2004, 204, 17:50. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2004:083 2004/08/13 ASL DCC Tyler Storm ASL KONO IU 00/?H? 2004,225,15:15:00 2004,245,17:04:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. Data from the STS-1s are only digitizer noise. END PROBLEM RESOLUTION REPORT ASL2004:083 2004/09/02 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The KONO station operator fixed the problem in the digitizer, and the STS1 channels return to seismic data at 2004, 245, 17:04. END **************************************************************************** DATA PROBLEM REPORT ASL2004:084 2004/08/16 ASL DCC Valerie Peyton ASL LSA IC */* 2004,177,06:43:00 2004,355,04:43:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 452 Timing IS in error, as clock is unlocked. The GPS system at LSA appears to be unable to make contact with the GPS satellite constellation. Timing in the data is being taken from the internal OS9 clock. Timing is considered inaccurate. END PROBLEM RESOLUTION REPORT ASL2004:084 2004/12/20 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The LSA station operator replaced the GPS system. Timing quality returns to normal at 2004, 355, 04:43. END **************************************************************************** DATA PROBLEM REPORT ASL2004:085 2004/08/27 ASL DCC Valerie Peyton ASL INCN IU 00/*HZ 2004,237,21:33:00 2004,247,08:12:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The Z component of the STS1 at INCN has fallen against one of its stops. Data cannot be used. END PROBLEM RESOLUTION REPORT ASL2004:085 2004/09/03 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The INCN station operator recentered the STS1 Z. Data quality returns to normal at 2004, 247, 08:12. END **************************************************************************** DATA PROBLEM REPORT DMCQC2014:0110 2014/06/30 IRIS DMC Gillian Sharer DMC H46A TA ?HZ 2014,042,08:32:00 2014,149,23:30:00 Problem Description OTHER TA.H46A.?HZ began to show spiky sensor noise (possibly corrosion related) on Feb 11, 2014 08:32 UTC. For much of this time period the channel was not recording seismic energy, and when it did record any ground motion the data quality was severely affected. END PROBLEM RESOLUTION REPORT DMCQC2014:0110 2014/06/30 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The sensor was replaced on May 29 2014, and the station began to record good data again after 23:30 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2014:0112 2014/03/07 IRIS DMC Gillian Sharer DMC 342B N4 * 2014,062,03:09:00 2014,062,08:22:00 Problem Description OTHER On March 3, 2014 03:09 UTC, all 3 masses of N4.342B suddenly hit the stops. The station did not record seismic energy until the masses recentered at 08:22 UTC. END PROBLEM RESOLUTION REPORT DMCQC2014:0112 2014/03/07 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION N4.342B resumed recording normal seismic data after the mass recenter. END **************************************************************************** DATA PROBLEM REPORT DMCQC2014:0111 2014/03/07 IRIS DMC Gillian Sharer DMC TOLK TA * 2014,039,13:34:00 2014,051,16:56:00 Problem Description DATA DROPOUTS From Feb 8, 2014 to Feb 20, 2014, TA.TOLK repeatedly lost power and rebooted its digitizer. When data returned, more often than not TOLK.VM6 was against the stops and TOLK.01.LHE was not recording seismic energy. TOLK resumed normal operations after a mass recenter on 2014.051 16:56 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2010:0019 2010/08/30 IRIS DMC Gillian Sharer DMC 430A TA ?H[ENZ] 2010,106,10:30:00 2010,106,15:23:00 Problem Description DEAD CHANNEL During this time period, VM1 and VM3 were near or against the stops. The data was nonseismic. END PROBLEM RESOLUTION REPORT DMCQC2010:0019 2010/08/30 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION TA.430A resumed normal operation after a mass recenter on day 106 15:23 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2010:0018 2010/08/30 IRIS DMC Gillian Sharer DMC W28A TA ?HZ 2010,163,06:35:00 2010,164,12:08:00 Problem Description DEAD CHANNEL TA.W28A experienced high levels of electronic noise rendering it mostly nonseismic. END PROBLEM RESOLUTION REPORT DMCQC2010:0018 2010/08/30 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION W28A spontaneously resumed normal operation on day 164 12:08 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2010:0015 2010/08/30 IRIS DMC Gillian Sharer DMC 529A TA ?HZ 2010,187,08:42:00 2010,199,23:16:00 Problem Description DEAD CHANNEL 529A.?HZ was nonseismic during this time period due to flooding and corrosion. END PROBLEM RESOLUTION REPORT DMCQC2010:0015 2010/08/30 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The sensor was replaced. END **************************************************************************** DATA PROBLEM REPORT DMCQC2010:0014 2010/03/05 IRIS DMC Gillian Sharer DMC ISA CI * 2010,014,06:19:00 2010,028,11:56:00 Problem Description DATA DROPOUTS Excessive gaps make the data from CI.ISA unuseable for much of this time period. END PROBLEM RESOLUTION REPORT DMCQC2010:0014 2010/03/05 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION Data continuity was restored after telemetry settings changed. END **************************************************************************** DATA PROBLEM REPORT DMCQC2010:0017 2010/08/30 IRIS DMC Gillian Sharer DMC T29A TA ?HZ 2010,169,21:57:00 2010,170,18:26:00 Problem Description DEAD CHANNEL During this time period, T29A.?HZ recorded large amplitude noise and was nonseismic. END PROBLEM RESOLUTION REPORT DMCQC2010:0017 2010/08/30 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION On day 170, T29A spontaneously resumed normal operation. END **************************************************************************** DATA PROBLEM REPORT DMCQC2010:0016 2010/08/30 IRIS DMC Gillian Sharer DMC 429A TA ?H[ENZ] 2010,185,16:28:00 2010,198,15:30:00 Problem Description DEAD CHANNEL 429A was nonseismic during this time period due to vault flooding and subsequent corrosion. END PROBLEM RESOLUTION REPORT DMCQC2010:0016 2010/08/30 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The sensor was replaced. END **************************************************************************** DATA PROBLEM REPORT DMCQC2010:0011 2010/03/05 IRIS DMC Gillian Sharer DMC BC3 CI * 2010,021,21:50:00 2010,025,18:42:00 Problem Description DEAD CHANNEL During this time period, CI.BC3 masses were near or against the stops. The data was non-seismic. END PROBLEM RESOLUTION REPORT DMCQC2010:0011 2010/03/05 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION BC3 returned to normal operation after a mass recenter. END **************************************************************************** DATA PROBLEM REPORT DMCQC2010:0010 2010/03/05 IRIS DMC Gillian Sharer DMC 735A TA * 2010,008,18:22:00 2010,014,21:43:00 Problem Description DEAD CHANNEL TA.735A.VM2 hit the stops on several occasions resulting in non-seismic data for much of this time period. Multiple auto-recenters were unable to correct the mass drift. END PROBLEM RESOLUTION REPORT DMCQC2010:0010 2010/03/05 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION Following a service visit, the station resumed normal operation. The sensor was leveled and re-centered, and sand added to the vault. There is still some minor mass drift due to vault settling. END **************************************************************************** DATA PROBLEM REPORT IDC1994:01 1994/05/06 OTHER T.W. McElfresh IDC polling TBT IU ? 1994,105,00:00:00 1994,126,00:00:00 Problem Description OTHER Since April 14, IDC has been unable to obtain data from TBT. END **************************************************************************** DATA PROBLEM REPORT DMCQC2010:0013 2010/03/05 IRIS DMC Gillian Sharer DMC ISA CI ?HE 2010,013,22:28:00 2010,028,21:50:00 Problem Description DEAD CHANNEL During this time period, CI.ISA.?HE recorded digitizer noise only. END PROBLEM RESOLUTION REPORT DMCQC2010:0013 2010/01/01 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION ISA.?HE began recording good data again after a bad cable was replaced. END **************************************************************************** DATA PROBLEM REPORT DMCQC2010:0012 2010/03/05 IRIS DMC Gillian Sharer DMC CIA CI * 2010,021,20:59:00 2010,025,18:51:00 Problem Description DEAD CHANNEL CI.CIA masses hit the stops and the station became non-seismic. END PROBLEM RESOLUTION REPORT DMCQC2010:0012 2010/03/05 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION CI.CIA returned to normal operation after a mass recenter. END **************************************************************************** DATA PROBLEM REPORT DMCQC2010:0008 2010/03/05 IRIS DMC Gillian Sharer DMC MPM CI * 2010,001,00:00:00 2010,001,00:00:00 Problem Description INCORRECT TIME MPM has a continuing problem with timing (as of writing, the station is off by 15 seconds). The start date is an estimate, and it's unclear when the problem actually started. END **************************************************************************** DATA PROBLEM REPORT DMCQC2010:0007 2010/03/05 IRIS DMC Gillian Sharer DMC Z34A TA ?HE 2009,323,22:53:00 2009,339,21:11:00 Problem Description OTHER During this time period, Z34A.?HE dc offset was greater than -130000 counts and falling rapidly. The seismic data is suspect. END PROBLEM RESOLUTION REPORT DMCQC2010:0007 2010/03/05 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION On day 339 21:11 UTC, the station resumed normal operation when the dc offset returned to usual values. END **************************************************************************** DATA PROBLEM REPORT DMCQC2010:0009 2010/03/05 IRIS DMC Gillian Sharer DMC MPM CI * 2010,007,23:27:00 2010,012,12:20:00 Problem Description DATA DROPOUTS From 2010 day 7-12, CI.MPM has excessive gaps which render the data useless. END **************************************************************************** DATA PROBLEM REPORT DMCQC2010:0004 2010/02/12 IRIS DMC Gillian Sharer DMC VES CI * 2009,328,17:30:00 2009,356,20:10:00 Problem Description DEAD CHANNEL After a sensor swap on day 328, VES became nonseismic. END PROBLEM RESOLUTION REPORT DMCQC2010:0004 2010/02/12 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION VES recovered normal operation when its datalogger was replaced. END **************************************************************************** DATA PROBLEM REPORT DMCQC2010:0003 2010/02/12 IRIS DMC Gillian Sharer DMC VES CI [BL]H[EZ] 2009,313,23:08:00 2009,328,17:30:00 Problem Description INVALID RESPONSE On 2009 day 313 the dc offset of VE.?HE dropped to -34000 counts. At the same time, VES.?HZ amplitudes appreciably decreased. Sensor output is suspect during this period. END PROBLEM RESOLUTION REPORT DMCQC2010:0003 2010/02/12 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The sensor was replaced on 2009 day 328 17:30 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2010:0005 2010/02/12 IRIS DMC Gillian Sharer DMC IRM CI ?HE 2009,264,18:56:00 2009,322,19:05:00 Problem Description DEAD CHANNEL CI.IRM stopped recording seismic data after a mass recenter on 2009 day 264 18:56 UTC. On 2009 day 268 19:45 UTC, the N and Z channels recovered after a lock/unlock and mass recenter. END PROBLEM RESOLUTION REPORT DMCQC2010:0005 2010/02/12 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION On 2009 day 322, the sensor was replaced. END **************************************************************************** DATA PROBLEM REPORT DMCQC2010:0002 2010/02/12 IRIS DMC Gillian Sharer DMC X24A TA [BL]HN 2009,303,04:19:00 2009,361,15:17:00 Problem Description INVALID RESPONSE During this time period, TA.X24A had an apparent differential output failure affecting the N channel. On day 303 04:19 UTC, there was a sudden drop in DC offset and amplitudes were reduced by ~1/2. END PROBLEM RESOLUTION REPORT DMCQC2010:0002 2010/02/12 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION X24A recovered normal operation after a mass recenter on day 361 15:17 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2010:0033 2010/11/19 IRIS DMC Gillian Sharer DMC X31A TA ?H[EN] 2010,295,11:18:00 2010,296,15:18:00 Problem Description OTHER During this time, VM3 and VM2 had a high rate of drift, affecting ?H[EN]. From day 295 14:40-15:18 UTC, VM3 was at the stops and ?HE became non-seismic. END PROBLEM RESOLUTION REPORT DMCQC2010:0033 2010/11/19 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION After multiple mass recenters, the station resumed normal operation. END **************************************************************************** DATA PROBLEM REPORT DMCQC2010:0032 2010/11/19 IRIS DMC Gillian Sharer DMC T29A TA * 2010,193,00:00:00 2010,323,00:00:00 Problem Description INCORRECT TIME The GPS clock failed to lock during this time period. Clock quality at 10%. END PROBLEM RESOLUTION REPORT DMCQC2010:0032 2010/11/19 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION Digitizer was not providing power to GPS. GPS locked after digitizer replacement. END **************************************************************************** DATA PROBLEM REPORT ASL2000:001 2000/01/11 ASL DCC George Slad ASL POHA IU * 1999,317,00:00:00 1999,331,13:51:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. All channels are undergoing tests and calibrations during this time. END PROBLEM RESOLUTION REPORT ASL2000:001 2004/11/26 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION POHA installation and maintenance work was completed, and data quality returned to normal, at 1999, 331, 13:51. END **************************************************************************** DATA PROBLEM REPORT ASL2000:002 2000/01/13 ASL DCC Valerie Peyton ASL MIDW IU * 1999,317,13:50:00 1999,339,12:50:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE S 10 Station is down. No data recorded for ~9.2 days. END PROBLEM RESOLUTION REPORT ASL2000:002 2000/01/13 ASL DCC Valerie Peyton Description of Problem Resolution COMMENT Normal data recording resumed as of 1999, 339 12:50 END **************************************************************************** DATA PROBLEM REPORT ASL2000:003 2000/01/13 ASL DCC Valerie Peyton ASL KONO IU 00-BHN 1999,349,15:24:00 1999,357,05:58:00 Problem Description HIGH FREQUENCY NOISE SEED COMMENT REFERENCE C 4500 Channel has high noise background. High levels of high frequency noise (possibly instrument noise) on 00-BHN for approximately 8 days. END PROBLEM RESOLUTION REPORT ASL2000:003 2000/01/13 ASL DCC Valerie Peyton Description of Problem Resolution COMMENT The problem seems to have corrected itself: 00-BHN noise levels drop back to normal as of 1999, 357 05:58. END **************************************************************************** DATA PROBLEM REPORT ASL2000:004 2000/01/13 ASL DCC Valerie Peyton ASL GUMO IU BHE 1999,353,05:28:00 1999,359,23:34:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. Channel BHE on the sensor 10 (CMG3-T) lost mass capture and got stuck at the high end of its range on 1999, 353 05:38. END PROBLEM RESOLUTION REPORT ASL2000:004 2000/01/13 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Loss of mass capture was corrected by a re-centering command issued 1999, 359 23:34. END **************************************************************************** DATA PROBLEM REPORT ASL2000:005 2000/01/14 ASL DCC George Slad ASL XAN IC BH?,LH? 1999,295,00:00:00 1999,295,00:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. Location code 10. The STS-2 came on-line, however the masses of two of the three sensors have lost capture resulting in extremely large offset values. Therefore, the response of all three components are questionable at best. END **************************************************************************** DATA PROBLEM REPORT ASL2000:006 2000/01/14 ASL DCC George Slad ASL INCN IU ?HE 1999,214,01:00:00 1999,295,05:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. location code 00 The east component of the STS-1 lost mass capture. Data are unusable. END PROBLEM RESOLUTION REPORT ASL2000:006 2000/01/14 ASL DCC George Slad Description of Problem Resolution RESOLUTION Operators recentered the mass. Normal duty resumed on 1999,295. This problem was previously reported in ASL1999:044. END **************************************************************************** DATA PROBLEM REPORT ASL2000:007 2000/01/14 ASL DCC George Slad ASL INCN IU 10/BH?, 10/LH? 1999,214,08:00:00 2000,214,13:45:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. location code 10 The STS-2 instrument is inoperative. Data are unusable. END PROBLEM RESOLUTION REPORT ASL2000:007 2000/08/02 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION On 1999,214 the INCN vault flooded, damaging the host-box of the STS-2. The host-box was replaced on 2000,214,13:45. We are now collecting seismic data from the STS-2. END **************************************************************************** DATA PROBLEM REPORT ASL2000:008 2000/01/21 ASL DCC Valerie Peyton ASL KIEV IU *** 1999,333,18:21:00 1999,335,04:11:00 Problem Description DATA DROPOUTS Data are unavailable at KIEV for this time period because of a failure of the comm link between the station and the data processing unit. END PROBLEM RESOLUTION REPORT ASL2000:008 2000/01/21 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The comm link at KIEV resumed normal function at 1999,335,04:11. Some data did eventually become available for day 1999, 334. END **************************************************************************** DATA PROBLEM REPORT ASL2000:009 2000/01/21 ASL DCC Valerie Peyton ASL KIEV IU *** 1999,338,05:24:00 1999,342,09:53:00 Problem Description DATA DROPOUTS Data are unavailable for a 4.2 day period at KIEV because of a comm link problem. END PROBLEM RESOLUTION REPORT ASL2000:009 2000/01/21 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Normal communication with station KIEV resumed 1999,342,09:53. END **************************************************************************** DATA PROBLEM REPORT DMCQC2010:0029 2010/11/17 IRIS DMC Peggy Johnson DMC TEST TA HHE 2010,366,2323:00:00 2010,377,2323:00:00 Problem Description OTHER This is only a test. END **************************************************************************** DATA PROBLEM REPORT DMCQC2010:0026 2010/11/05 IRIS DMC Peggy Johnson DMC G30A TA ?H? 2010,111,15:46:00 2010,141,16:15:00 Problem Description DEAD CHANNEL All channels of dubious quality. First, E goes aseismic with large DC offset and increased noise. Unfixed by MRC. Then at various times, different channels go bad. END PROBLEM RESOLUTION REPORT DMCQC2010:0026 2010/11/05 IRIS DMC Peggy Johnson Description of Problem Resolution RESOLUTION Several attempts at fixing the station, including two sensor swaps, two or more Q330 swaps, as well as a cable swap eventually fixes the station. END **************************************************************************** DATA PROBLEM REPORT DMCQC2010:0025 2010/11/02 IRIS DMC Mary Templeton DMC PKME US *H* 2010,294,15:05:00 2010,305,17:30:00 Problem Description INVALID RESPONSE During this time, one or more STS-2 components were drifting significantly, introducing increased LP noise. END PROBLEM RESOLUTION REPORT DMCQC2010:0025 2010/11/02 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION The sensor masses were recentered and the instrument resumed normal recording. END **************************************************************************** DATA PROBLEM REPORT DMCQC2010:0028 2010/11/17 IRIS DMC Peggy Johnson DMC B22A TA ?H? 2010,041,22:21:00 2010,042,1841:00:00 Problem Description OTHER Masses began drifting and then all seismic channels recorded what looks like tilt, largest on the horizontal channels. The tilting lasted about 20 hours and suddenly stopped. END **************************************************************************** DATA PROBLEM REPORT DMCQC2010:0027 2010/11/17 IRIS DMC Peggy Johnson DMC B22A TA ?H? 2010,041,2221:00:00 2010,042,1841:00:00 Problem Description OTHER Masses began drifting and then all seismic channels recorded what looks like tilt, largest on the horizontal channels. The tilting lasted about 20 hours and suddenly stopped. END **************************************************************************** DATA PROBLEM REPORT DMCQC2010:0022 2010/10/22 IRIS DMC Peggy Johnson DMC H28A TA ?HZ 2010,064,00:09:00 2010,093,11:39:00 Problem Description INVALID RESPONSE During this time period, the Z channel of TA.H28A experienced an apparent differential output failure causing rather sudden drop in DC offset and a reduced amplitudes (approximately half amplitude). END PROBLEM RESOLUTION REPORT DMCQC2010:0022 2010/10/22 IRIS DMC Peggy Johnson Description of Problem Resolution RESOLUTION The DC offset and reduced amplitudes were fixed by a step calibration. END **************************************************************************** DATA PROBLEM REPORT DMCQC2010:0021 2010/10/18 IRIS DMC Mary Templeton DMC PKME US *H* 2010,288,11:31:00 2010,288,11:31:00 Problem Description INVALID RESPONSE One or more components of the STS-2 at PKME has drifted against the stops. None of the channels are recording seismic energy. END **************************************************************************** DATA PROBLEM REPORT ASL2000:010 2000/01/21 ASL DCC Valerie Peyton ASL KBS IU *** 1999,348,04:20:00 1999,352,10:58:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE S 1210 Problems with remote telemetry. Data are unavailable because of a comm link problem between remote station KBS and its data processing system. END PROBLEM RESOLUTION REPORT ASL2000:010 2000/01/21 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Normal communication resumed at station KBS on 1999,352,10:58. END **************************************************************************** DATA PROBLEM REPORT DMCQC2010:0024 2010/10/22 IRIS DMC Peggy Johnson DMC H28A TA ?HZ 2010,185,21:04:00 2010,221,16:25:00 Problem Description DATA DROPOUTS During this time period, the Z channel of TA.H28A experienced an apparent differential output failure causing rather sudden drop in DC offset and a reduced amplitudes (approximately half amplitude). END PROBLEM RESOLUTION REPORT DMCQC2010:0024 2010/10/22 IRIS DMC Peggy Johnson Description of Problem Resolution RESOLUTION Problem is not resolved by the mass recenter d 221, which instead caused failure of the U-element. END **************************************************************************** DATA PROBLEM REPORT ASL2000:011 2000/01/25 ASL DCC Valerie Peyton ASL MIDW IU 00/*H* 1999,333,12:20:00 2001,052,00:53:00 Problem Description SPIKES SEED COMMENT REFERENCE C 4510 Channel has frequent spiking. The data exhibit an excessive number of spikes, swings and jumps. The horizontal components of the sensor are most severely affected, with the amplitude of the spikes regularly exceeding 500000 counts. The spikes are non-periodic, and their origin has not yet been determined. Phases which arrive between spikes may be useable; otherwise the horizontals are completely corrupted. END PROBLEM RESOLUTION REPORT ASL2000:011 2003/05/30 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION MIDW data improve radically after a long data outage. While there is still some residual spiking to be observed in the data, it is all well below background noise levels beginning at 2001, 052, 00:53. Data quality is considered normal at this time. END **************************************************************************** DATA PROBLEM REPORT DMCQC2010:0023 2010/10/22 IRIS DMC Peggy Johnson DMC H28A TA ?HZ 2010,107,13:02:00 2010,123,05:01:00 Problem Description INVALID RESPONSE During this time period, the Z channel of TA.H28A experienced an apparent differential output failure causing rather sudden drop in DC offset and a reduced amplitudes (approximately half amplitude). END PROBLEM RESOLUTION REPORT DMCQC2010:0023 2010/10/22 IRIS DMC Peggy Johnson Description of Problem Resolution RESOLUTION The DC offset and reduced amplitudes were fixed by a step calibration 300 secs -36dB, with a 5 minute settling and 5 minute trailer. It looks like the \"other half\" rejoined us about a minute into the settling period, before any cal signal dinged the sensor. END **************************************************************************** DATA PROBLEM REPORT ASL2000:012 2000/01/26 ASL DCC Valerie Peyton ASL MAJO IU 10/*** 1999,203,00:00:00 2000,019,06:00:00 Problem Description OTHER SEED COMMENT REFERENCE C 4010 Channel is down. The FBA23 accelerometer at MAJO is inoperational and will be replaced. END PROBLEM RESOLUTION REPORT ASL2000:012 2000/09/29 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The FBA23 at MAJO was replaced on 2000,019, and the data from the new FBA23 look good. END **************************************************************************** DATA PROBLEM REPORT ASL2000:013 2000/01/27 ASL DCC Valerie Peyton ASL WAKE IU 10/* 1999,352,03:48:00 2000,041,22:07:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. At 1999 352 03:48:47.137 all three masses on the WAKE CMG3-T-B (the 10 sensor) pegged themselves; we will ask the station operator to issue a centering command. END PROBLEM RESOLUTION REPORT ASL2000:013 2000/02/11 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION As of 2000,041,22:07 the Z and E masses of the CMG3-T-B are centered and operating properly. END **************************************************************************** DATA PROBLEM REPORT ASL2000:014 2000/01/27 ASL DCC Tyler Storm ASL TIXI IU BHZ, LHZ, VHZ, UHZ 1998,286,00:00:00 2000,274,15:40:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 7100 Response information not available at this time. There is a problem with the instrument response at >20 second periods. Near the 20 second range the response is 10 to 15db too high. As a result surface waves from this vertical component are much too large. At periods greater than 20 seconds the response drops off very sharply. END PROBLEM RESOLUTION REPORT ASL2000:014 2000/10/02 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The STS-1 Z instrument at TIXI was replaced on 2000,274. The response of the replacement instrument is correct for all periods. END **************************************************************************** DATA PROBLEM REPORT DMCQC2010:0020 2010/10/01 IRIS DMC Peggy Johnson DMC H28A TA ?H? 2010,221,15:17:00 2010,225,12:00:00 Problem Description DEAD CHANNEL Element U failed following a mass recentering command d 221, which rendered the sensor channels aseismic. END PROBLEM RESOLUTION REPORT DMCQC2010:0020 2010/10/01 IRIS DMC Peggy Johnson Description of Problem Resolution RESOLUTION H28A resumed normal operation after a sensor swap d 224, between 21:55 - 23:16 UTC. After settling, the sensor is seismic again by d 2225 12:00 UTC. END **************************************************************************** DATA PROBLEM REPORT ASL2000:015 2000/01/27 ASL DCC Tyler Storm ASL PAB IU 00/?H? 1999,259,14:00:00 2000,347,02:25:00 Problem Description SPIKES SEED COMMENT REFERENCE C 4510 Channel has frequent spiking. Data contain large spikes. This looks like it could be a moisture problem again (ref. ASL95:023). END PROBLEM RESOLUTION REPORT ASL2000:015 2007/01/24 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION PAB STS1 spiking is gone, and noise levels are normal, as of 2000, 347, 02:25. END **************************************************************************** DATA PROBLEM REPORT ASL2000:016 2000/02/01 ASL DCC Tyler Storm ASL DPC CZ ? 1999,254,15:00:00 2001,096,12:00:00 Problem Description OTHER SEED COMMENT REFERENCE C 4410 Channel data quality is poor. The spectral plots look very abnormal. The basic envelope of the spectral data has change significantly from past. The change is most definitely due to an instrument problem and does not represent a "real" local noise change at the site. We believe there is most likely a problem with one of the sensors (U,V or W) in the STS-2 since we see the effect on all three derived channels (Z, N, and E) but in unequal proportions. END PROBLEM RESOLUTION REPORT ASL2000:016 2003/03/13 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The DPC station operator fixed the problem with the STS-2 at 2001, 096, 12:00. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2000:017 2000/02/10 ASL DCC Valerie Peyton ASL SPA IU *** 1999,307,00:00:00 1999,316,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. Data are unuseable or unavailable for much of this time period as a result of station maintenance. END PROBLEM RESOLUTION REPORT ASL2000:017 2000/02/10 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The engineers finished mainenance and left the station at the end of the day on 1999,315. END **************************************************************************** DATA PROBLEM REPORT ASL2000:018 2000/02/10 ASL DCC Valerie Peyton ASL SPA IU 00/?HN 1999,356,03:03:00 1999,362,23:01:00 Problem Description OTHER SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. Mass capture lost on the 00-N component (STS1 N). END PROBLEM RESOLUTION REPORT ASL2000:018 2000/02/10 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION 00-N recentered at 1999,362,23:01. END **************************************************************************** DATA PROBLEM REPORT ASL2000:019 2000/02/10 ASL DCC Valerie Peyton ASL SPA IU 00/?HN 1999,191,20:00:00 1999,193,20:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. STS1 N component lost mass capture. END PROBLEM RESOLUTION REPORT ASL2000:019 2000/02/10 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION STS1 N component centered 1999,193,20 END **************************************************************************** DATA PROBLEM REPORT DMC1994:005 1994/02/18 IRIS DMC Rick Benson DMC SCP IU LH? 1990,192,00:00:00 1990,192,00:00:00 Problem Description TIME TEARS SCP has time tears every 330 seconds. However, this can be worked around with 'rdseed' by setting the environment variable for clock tolerance higher. END **************************************************************************** DATA PROBLEM REPORT DMC1994:006 1994/02/21 IRIS DMC Rick Benson DMC COL DW BHZ LHZ 1990,183,23:30:00 1991,063,00:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4525 Channel has spiking and other data glitches. COL LHZ channel appears to be dead or at the very least, functioning very poorly and unusable. Postscript will be useful for this one: ~ftp/pub/qc/qc_ps/DMC94:006_ps and addendum postscript file DMC94:006.ps.b END PROBLEM RESOLUTION REPORT DMC1994:006 1994/04/07 ASL Tyler Storm Description of Problem Resolution RESOLUTION The LHZ seismometer was vandalized during a break-in in mid 90. Due to severe weather conditions, the problem was not resolved until the station was upgraded in Mar of 91. END **************************************************************************** DATA PROBLEM REPORT DMC1994:007 1994/02/21 IRIS DMC Rick Benson DMC HIA IU LH? 1991,260,00:00:00 1991,260,00:00:00 Problem Description DIGITIZER PROBLEM ? All three Long Period components of HIA show the same symptoms, that of squared off waveforms. Postscript will be useful for this one: ~ftp/pub/qc/qc_ps/DMC1994:007_ps END PROBLEM RESOLUTION REPORT DMC1994:007 1994/04/22 ASL Tyler Storm Description of Problem Resolution Comment The data from HIA (91, 260) does have a digitizer problem. It seems to clear up on the BH channels soon after this time segment, but then the problem reappears on other channels. If I remember correctly, these digitizer problems went on for years, they just kept moving around. I presume the problem would move because the operators were swapping various boards to try to remedy, or isolate the problem. There are enough cases where this problem started, and then stopped, that it would be impossible to log them all. The problem eventually cleared up, but because of it's sporadic behavior, I do not have an exact end date. END **************************************************************************** DATA PROBLEM REPORT DMC1994:008 1994/02/21 IRIS DMC Rick Benson DMC HRV IU UH[EN] 1992,001,00:00:00 1992,001,00:00:00 Problem Description DIGITIZER PROBLEM ? The horizontal UH channels of HRV show pulses approximately every 35 minutes or so. The UHZ component looks fine. Postscript file is: ~ftp/pub/qc/qc_ps/DMC1994:008_ps END PROBLEM RESOLUTION REPORT DMC1994:008 1994/04/10 ASL Tyler Storm Description of Problem Resolution Comment This isn't a digitizer problem at HRV, but I don't have a good explanation for it. I asked the people at HRV about the pulses a year ago, and they thought the anomaly might be caused by a nearby observatory (some sort of large power source). END **************************************************************************** DATA PROBLEM REPORT DMC1994:009 1994/02/22 IRIS DMC Rick Benson DMC COR IU UMZ 1990,260,00:00:00 1990,206,00:00:00 Problem Description DEAD CHANNEL Only one component, the UMZ channel, is dead on this day, at least. Postscript file is: ~ftp/pub/qc/qc_ps/DMC94:009_ps END PROBLEM RESOLUTION REPORT DMC1994:009 2003/03/07 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The problem with the UMZ channel from COR on 1990, 260 cannot be reproduced with analysis of the archived data. No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT HRV1994:038 1994/06/13 Harvard WQC Goran Ekstrom ASL CCM IU BH* LH* UH* VH* 1989,251,00:00:00 1990,059,00:00:00 Problem Description POLARITY REVERSED The header information for CCM VHZ channels is not consistent with the BHZ and LHZ channels. VHZ appears reversed, while BHZ and LHZ are not. BHZ and LHZ show a change in 1990 which is not seen for VHZ. (All the info is from the dataless SEED volume of 5/9/94). END PROBLEM RESOLUTION REPORT HRV1994:038 1994/06/16 ASL Tyler Storm Description of Problem Resolution Resolution I do not remember the details concerning the polarity reversal at CCM. However, if the BHZ, LHZ, and UHZ had a polarity reversal during a time frame, I'm sure the same is true for the VHZ stream. I have changed the VHZ polarity information to reflect the same reversal that was listed for the other vertical channels. Thanks for the info. SUPPLEMENT All channels on the STS-1 at CCM were reversed for the first several months of installation (1989,251 - 1990,059). The polarities are being reversed in the dataless. To get correct polarities out, be sure to invoke the "Check Reversal" option in rdseed. END **************************************************************************** DATA PROBLEM REPORT HRV1994:039 1994/06/18 Harvard WQC Misha Salganik ASL KIV II BHZ 1994,000,00:00:00 1994,000,00:00:00 Problem Description LOW FREQUENCY NOISE See postscript file in /pub/qc/qc_ps. END **************************************************************************** DATA PROBLEM REPORT HRV1994:036 1994/06/13 Harvard WQC Misha Salganik SPYDER NWAO IU LHN 1994,157,20:47:00 1994,157,20:47:00 Problem Description OTHER? See postscript file in /pub/qc/qc_ps. END PROBLEM RESOLUTION REPORT HRV1994:036 1994/08/23 ASL Tyler Storm Description of Problem Resolution Resolution The NWAO (LHN) data during this time frame appears fine. I would guess that the problem depicted in HRV1994:036_ps was some sort of a data transmission error. END **************************************************************************** DATA PROBLEM REPORT HRV1994:037 1994/06/13 Harvard WQC Misha Salganik SPYDER CHTO IU LHZ LHN LHE 1994,154,18:16:00 1994,154,18:16:00 Problem Description INCORRECT TIME See postscript file in /pub/qc/qc_ps. END PROBLEM RESOLUTION REPORT HRV1994:037 1994/11/15 ASL Tyler Storm Description of Problem Resolution Comment The timing at CHTO appears to be about 15 seconds in error for the event at 18:16 on 3 June 94. However, I analyzed another event, on the same day, and the timing seemed to be accurate. I had waited to file this problem report with hope that the dialup line would be repaired. With dialup access, I could get the timing logs, and hopefully get some insight on this intermittent problem. At this time, dialup line is still inoperative. One theory is the extremely heavy rains during this time of year are interfering with the GPS signal. No further action will be taken until I can obtain further information. END **************************************************************************** DATA PROBLEM REPORT HRV1994:034 1994/06/13 Harvard WQC Misha Salganik SPYDER AFI IU VHN VHE 1994,154,21:07:00 1994,154,21:07:00 Problem Description LOW FREQUENCY NOISE See postscript file in /pub/qc/qc_ps. END PROBLEM RESOLUTION REPORT HRV1994:034 2000/06/06 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Station AFI has a strong diurnal trend which is manifested by very high levels of low frequency noise on the horizontals from roughly 17:00 to 06:00 the following morning (Zulu). This corresponds to a local time of 5:00 to 18:00 each day. It appears that we are simply seeing a small slice of this noise in the file HRV94:034.ps. END **************************************************************************** DATA PROBLEM REPORT HRV1994:035 1994/06/13 Harvard WQC Misha Salganik SPYDER PMG IU LHZ LHN LHE 1994,157,09:03:00 1994,157,09:03:00 Problem Description INCORRECT TIME See postscript file in /pub/qc/qc_ps. END PROBLEM RESOLUTION REPORT HRV1994:035 1994/08/25 ASL Tyler Storm Description of Problem Resolution Resolution I believe the timing was correct at PMG. I looked at four events during June, including the one in question, and the p arrivals were where I expected them to be within a second. END **************************************************************************** DATA PROBLEM REPORT HRV1994:032 1994/05/27 Harvard WQC Misha Salganik SPYDER TATO IU VHE 1994,131,08:18:00 1994,131,08:18:00 Problem Description LOW FREQUENCY NOISE See postscript file in /pub/qc/qc_ps. END PROBLEM RESOLUTION REPORT HRV1994:032 1994/09/27 ASL Tyler Storm Description of Problem Resolution SUPPLEMENT A new instrument was installed at TATO the 2nd week of Sep 93 to replace one which had been damaged by lightning. Since this time, the horizontal noise levels at longer periods (20 seconds and greater) have risen considerably. The increased noise level is most noticeable on the E/W channels. The Seismometer will be replaced when another one becomes available. END **************************************************************************** DATA PROBLEM REPORT HRV1994:033 1994/06/13 Harvard WQC Misha Salganik SPYDER ADK IU VHZ 1994,154,21:07:00 1994,154,21:07:00 Problem Description DATA GLITCHES See postscript file in /pub/qc/qc_ps. END PROBLEM RESOLUTION REPORT HRV1994:033 1994/08/17 ASL Tyler Storm Description of Problem Resolution Comment This is an interesting problem. The data glitch we see at ADK (VHZ) could possibly be a compression error, we don't know for sure. We can rule out a lot of the more simple things, such as power problems, because the problem does not occur on the channel that VHZ is derived from (LHZ). The data glitch is 4 minutes long, and the mean value is different (lower) after the glitch. I am going to send an example of this anomaly to several people to get their opinions. If someone comes up with a explanation, I'll file a SUPPLEMENT I have placed an close up view of the problem in the IRIS/DMC ftp area. The postscript file has LHZ plotted with VHZ for comparison. See postscript file in /pub/qc/qc_ps/HRV1994:033_prr.ps. END **************************************************************************** DATA PROBLEM REPORT ASL2000:020 2000/02/10 ASL DCC Valerie Peyton ASL SPA IU 10/?HE 1999,102,01:45:00 1999,105,07:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. CMG3-T E mass lost capture. END PROBLEM RESOLUTION REPORT ASL2000:020 2000/02/10 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION CMG3-T recentered 1999,105,07. END **************************************************************************** DATA PROBLEM REPORT DMC1994:001 1994/02/10 IRIS DMC Rick Benson DMC KIP IU LHE 1993,220,00:00:00 1994,120,00:00:00 Problem Description LOW FREQUENCY NOISE In reviewing event data for an event during the 08 hour it is noted that this channel is bad, though perhaps not fair to call it 'dead'. If you look at the data unfiltered, you see a squaring off of the data as though the mass was bottoming or something. The postscript file is a filtered look at the data with other data to compare to. A postscript file is available in ~ftp/pub/qc/qc_ps/DMC94:001 END PROBLEM RESOLUTION REPORT DMC1994:001 1994/05/24 ASL Tyler Storm Description of Problem Resolution SUPPLEMENT KIP's east/west seismometer was replaced day 120, 1994. See Problem Resolution Report HRV1993:028 for more detail. END **************************************************************************** DATA PROBLEM REPORT HRV1994:030 1994/05/27 Harvard WQC Misha Salganik SPYDER SNZO IU VHE,VHZ 1993,348,06:07:00 1994,014,19:50:00 Problem Description OTHER Dead channels. See postscript file in /pub/qc/qc_ps. END PROBLEM RESOLUTION REPORT HRV1994:030 1994/06/06 ASL Tyler Storm Description of Problem Resolution Comment VHZ, and VHN were inoperative at SNZO from 00:30 UTC 14 Dec 93 through 19:50 UTC 14 Dec 93 (VHE was OK). This appears to be the same problem described in problem report HRV1994:031. At this time, I do not know the cause of the problem, but we have suggested some tests for the station operator to perform which should narrow down source. END **************************************************************************** DATA PROBLEM REPORT ASL2000:021 2000/02/10 ASL DCC Valerie Peyton ASL SPA IU 10/?HE 1999,231,07:00:00 1999,314,23:17:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. CMG3-T E mass lost capture. END PROBLEM RESOLUTION REPORT ASL2000:021 2000/02/10 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The CMG3-T at SPA was recentered late in the day on 1999,314. END **************************************************************************** DATA PROBLEM REPORT DMC1994:002 1994/02/14 IRIS DMC Rick Benson GOPHER ADK IU LH? BH? 1994,042,00:00:00 1994,049,00:00:00 Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. DEAD CHANNEL? ADK data is unusable for the gopher event at 04:16 on the 12th of Feb. A postscript file is available in ~ftp/pub/qc/qc_ps/DMC94:002.ps for LH and ftp/pub/qc/qc_ps/DMC94:002.b.ps for the BB channel; END PROBLEM RESOLUTION REPORT DMC1994:002 1994/02/23 ASL Tyler Storm Description of Problem Resolution Resolution A technician from ASL was at the station from 94,042 through 94,048 for a for training purposes, and to re-seal the belljars.taken off line a couple times END **************************************************************************** DATA PROBLEM REPORT HRV1994:031 1994/05/27 Harvard WQC Misha Salganik SPYDER SNZO IU VHE,VHZ,LHZ,LHE 1994,144,04:44:00 1994,144,04:44:00 Problem Description OTHER Dead channels. See postscript file in /pub/qc/qc_ps. END PROBLEM RESOLUTION REPORT HRV1994:031 1994/06/02 ASL Tyler Storm Description of Problem Resolution Comment All broad-band North/South, and vertical channels at SNZO were dead from 00:53 UTC, 22 May 94 through 07:38 UTC, 26 May 94. East/West data streams were present throughout this time period. Possibly, the problem is within the analog board that controls the North/South and vertical channels (a different board controls the East/West and calibration channels). We have asked the station operator to swap these boards so we will be able to isolate the problem if it occurs again. END **************************************************************************** DATA PROBLEM REPORT ASL2000:022 2000/02/10 ASL DCC Valerie Peyton ASL SPA IU 10/?HN 1999,191,14:00:00 1999,193,08:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. CMG3-T N mass has lost capture. END PROBLEM RESOLUTION REPORT ASL2000:022 2000/02/10 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION CMG3-T recentered 99,193,08:00. END **************************************************************************** DATA PROBLEM REPORT DMC1994:003 1994/02/14 IRIS DMC Rick Benson DMC PMG IU * 1993,273,00:50:00 1993,273,02:25:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE S 110 TEST DATA: Calibration, and testing in progress. Dead Channel (VHE) END PROBLEM RESOLUTION REPORT DMC1994:003 1994/04/08 ASL Tyler Storm Description of Problem Resolution COMMENT I looked at PMG (VHE) on days 93, 273, and 274. The data appeared normal. ----------------- Response --------------------- It may be that the existence of large data glitches has scaled the seismogram to appear dead. -rick benson SUPPLEMENT Calibrations were being run during this time. The calibrations likely did scale the seismogram in a manner that made the VHE channel look dead. END **************************************************************************** DATA PROBLEM REPORT ASL2000:023 2000/02/10 ASL DCC Valerie Peyton ASL SPA IU 10/?HN 1999,231,07:00:00 1999,312,05:50:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. CMG3-T N mass lost capture. END PROBLEM RESOLUTION REPORT ASL2000:023 2000/02/10 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The N component of the CMG3-T at SPA was recentered 1999,312. END **************************************************************************** DATA PROBLEM REPORT DMC1994:004 1994/02/18 IRIS DMC Rick Benson DMC GSC TS LHE 1991,148,19:36:00 1991,158,18:27:00 Problem Description OTHER SEED COMMENT REFERENCE C 4010 Channel is down. GSC has a peculiar, very large amplitude offset/reset type of signal during the day at least on day 158. A postscript file can be found in ~ftp/pub/qc/qc_ps/DMC94:004_ps. Channel is unusable during this time. END PROBLEM RESOLUTION REPORT DMC1994:004 1994/04/13 ASL Tyler Storm Description of Problem Resolution RESOLUTION The east/west seismometer at GSC was put in "free period mode" and the waveform was clipping. The clipping went on from 1991, 148, 19:36 through 1991,158, 18:27. END **************************************************************************** DATA PROBLEM REPORT ASL2000:024 2000/02/11 ASL DCC Valerie Peyton ASL WAKE IU 10/?H1 1999,352,03:48:00 1999,352,03:48:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The N mass on the CMG3-T-B instrument is pegged, and numerous attempts to center it have failed. This mass will likely remain inoperational until we have the opportunity to visit Wake Island and either repair or replace the instrument. END PROBLEM RESOLUTION REPORT ASL2000:024 2001/08/14 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The N mass of the CMG3-T-B instrument at WAKE is no longer simply pegged, as the entire instrument has gone out of commission completely. Since the character of the problem has changed, this dpr is being closed out, and we invite you to see ASL2001:103 for the continuing saga of the travails of this little mass. Quite likely the only solution to the problem will be to retreive the instrument and bring it back to the lab for repair. END **************************************************************************** DATA PROBLEM REPORT ASL2000:025 2000/02/16 ASL DCC Valerie Peyton ASL SPA IU * 2000,041,03:23:00 2000,047,03:36:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. The STS1-N instrument was removed for replacement. The activity of the engineers in the vault will compromise data quality and availability on and off for this time period. END PROBLEM RESOLUTION REPORT ASL2000:025 2000/02/16 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION At 2000,047,03:36 installation of the replacement STS1-N instrument concluded. Data should now return to normal quality. END **************************************************************************** DATA PROBLEM REPORT ASL2000:026 2000/02/16 ASL DCC Valerie Peyton ASL SPA IU 00/?HN 2000,046,22:16:00 2002,005,05:23:00 Problem Description POLARITY REVERSED SEED COMMENT REFERENCE C 4700 Channel may have reversed polarity. The STS1-N instrument was installed with reversed orientation. This has been noted in the dataless seed volumes, and can be corrected when using rdseed if the "check reversal" option is invoked. At this point, we will not reorient the seismometer, as it is otherwise functioning well. END PROBLEM RESOLUTION REPORT ASL2000:026 2003/12/19 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION An ASL field engineer reoriented the SPA STS1 N seismometer. Polarity is correct as of 2002, 005, 05:23. END **************************************************************************** DATA PROBLEM REPORT ASL2000:027 2000/02/17 ASL DCC Valerie Peyton ASL SPA IU 00/?HN 1999,290,17:31:00 1999,291,02:53:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The STS1-N component lost mass capture. END PROBLEM RESOLUTION REPORT ASL2000:027 2000/02/17 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The STS1-N component was recentered 1999,291,02:53. END **************************************************************************** DATA PROBLEM REPORT ASL2000:028 2000/02/17 ASL DCC Valerie Peyton ASL ANMO IU 10/?H2 2000,045,21:58:00 2000,047,20:35:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The East component of the CMG3-T-B was disconnected to set up a test. END PROBLEM RESOLUTION REPORT ASL2000:028 2000/02/17 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The East component of the CMG3-T-B was reconnected and the test began at 2000,047,20:35. Testing will last a couple of months, and should not affect data quality, though we will probably see a few more data dropouts during this time. If so, I will write the problems up as they occur. END **************************************************************************** DATA PROBLEM REPORT ASL2000:029 2000/02/17 ASL DCC Valerie Peyton ASL XAN IC 10/?H? 1999,245,00:00:00 1999,295,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE C 4010 Channel is down. The STS2 sensor is recording digitizer noise only. END PROBLEM RESOLUTION REPORT ASL2000:029 2000/02/17 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The cause of the problem is unknown (perhaps the sensor was not connected to the digitizer, or the digitizer was down), but the sensor comes back on line at 1999,295,00:00. END **************************************************************************** DATA PROBLEM REPORT DMC1994:016 1994/03/06 IRIS DMC Rick Benson DMC PFO TS UM? 1992,262,00:00:00 1992,262,00:00:00 Problem Description DEAD CHANNELS All "U" components are dead. Postscript file is in ~ftp/pub/qc/qc_ps/DMC1994:016.ps on dmc. END **************************************************************************** DATA PROBLEM REPORT UW1999:002 1999/09/20 University of Washington Ken Creager SPYDER WAKE IU LHZ 1999,188,18:52:56 1999,188,18:52:56 Problem Description INCORRECT TIME Station WAKE appears to have timing problems. For example, the surface waves for the 1999/07/07 18:52:56.0 Kuril Islands earthquake appear to be about 5 minutes early (see LHZ record section in WILBER). This problem remains today (9/20/99). END PROBLEM RESOLUTION REPORT UW1999:002 2000/02/24 ASL DCC Valerie Peyton Description of Problem Resolution COMMENT I looked at archived data for the 1999/07/07 Kuril Islands event, as well as for events near that time, and could not find an obvious timing problem. However, the data from 1999/09/20 does indeed have a timing problem, as a result of poor clock funtion. That problem has been fixed. Please also see ASL1999:061. END **************************************************************************** DATA PROBLEM REPORT DMC1994:017 1994/03/06 IRIS DMC Rick Benson DMC COR IU *HZ 1990,161,15:24:00 1990,167,02:20:00 Problem Description OTHER SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. This component has a very long period, high amplitude offset. It appears to be seismic, but has this huge deviation dampening the signal. Postscript file is in ~ftp/pub/qc/qc_ps/DMC94:017.ps on dmc. END PROBLEM RESOLUTION REPORT DMC1994:017 1994/04/10 ASL Tyler Storm Description of Problem Resolution COMMENT The channel calms back down after a few days. It is possible that the belljar containing that seismometer lost vacuum, and the instrument was showing the effects of pressure and temperature changes. SUPPLEMENT It appears the STS1 Z component at COR was pegged during this time frame. Data quality returned to normal at 1990, 167, 02:20. END **************************************************************************** DATA PROBLEM REPORT UW1999:001 1999/04/21 UW Ken Creager DMC RAIO IU LHZ 1900,000,00:00:00 1900,000,00:00:00 Problem Description POLARITY REVERSED The LHZ channel at RAIO is apparently flipped. An example can be viewed at /pub/qc/qc_ps/UW1999.001.ps on anonymous ftp at dmc.iris.washington.edu It is flipped for event 981009_1154 in the FARM as well. I haven't checked to see when this started or ended. END PROBLEM RESOLUTION REPORT UW1999:001 2000/07/10 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The data currently do not show a polarity reversal. However, a dataless SEED volume with incorrect information may have produced the apparent reversal observed in 1999. END **************************************************************************** DATA PROBLEM REPORT DMC1994:018 1994/03/06 IRIS DMC Rick Benson DMC CMB BK UHZ, VHZ, LHZ, HHZ, BHZ 1992,180,11:56:00 1992,181,15:42:00 Problem Description OTHER SEED COMMENT REFERENCE S 110 TEST DATA: Calibration, and testing in progress. This is a curious one: All three vertical components (U,V,L), have the same low frequency (about 700 second period) sine wave obliterating the data. This has to be electronically introduced. You would at first want to see if its a cal pulse, but it goes on all day. Because it appears on just the vertical components, Ive made plots of all three sensors to show how similar they are. Postscript files are in ~ftp/pub/qc/qc_ps/DMC94:018.ps, 018.ps.b, and 018.ps.c. END PROBLEM RESOLUTION REPORT DMC1994:018 1994/04/10 ASL Tyler Storm Description of Problem Resolution Resolution The signal is a vertical calibration. This was the first data since the station was upgraded, so it would not be unusual to see some calibrations. However, I do not know why the calibration ran the whole day. END **************************************************************************** DATA PROBLEM REPORT DMC1994:019 1994/03/06 IRIS DMC Rick Benson DMC PFO IU UM? 1993,038,00:00:00 1993,038,00:00:00 Problem Description DEAD CHANNELS All three components are dead. Postscript file is in ~ftp/pub/qc/qc_ps/DMC1994:019.ps. END PROBLEM RESOLUTION REPORT DMC1994:019 1994/03/15 IDA Peter Davis Description of Problem Resolution Comment IDA does not routinely submit mass position information to the IRIS DMC archive. The IRIS/IDA data logger at PFO for this period did not record any UH* or UL* channels. Therefore it is not surprising that this channel would appear dead, since no data was submitted. END **************************************************************************** DATA PROBLEM REPORT HRV1994:027 1994/04/17 Harvard WQC Misha Salganik ASL SSE CD LHZ LHN LHE BHZ BHN BHE 1993,323,01:43:00 1993,323,01:43:00 Problem Description DATA GLITCHES See postscript file in /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1994:027 1994/06/23 ASL Tyler Storm Description of Problem Resolution Comment These look like the typical power surge spikes that we see on most CDSN data. No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT HRV1994:028 1994/04/22 Harvard WQC Misha Salganik ASL XAN IU LHN LHE BHE BHN 1993,330,23:20:00 1993,330,23:20:00 Problem Description LOW FREQUENCY NOISE See postscript file in /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1994:028 1994/08/16 ASL Tyler Storm Description of Problem Resolution Comment The noise (pulses) on the XAN horizontal data are most likely being caused by something making the vault tilt. These horizontal surface instruments are extremely sensitive to tilt. I did not see any problems with the vertical channels during the same time period. No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT HRV1994:025 1994/04/17 Harvard WQC Misha Salganik ASL RAR IU BHZ BHW BHV BHU BHN BHE 1993,330,23:20:00 1993,330,23:20:00 Problem Description OTHER LOOKS LIKE A DIGITIZER ERROR. See postscript file in /pub/qc/qc_ps. END PROBLEM RESOLUTION REPORT HRV1994:025 1994/04/20 ASL Tyler Storm Description of Problem Resolution RESOLUTION Technicians from ASL were at RAR during this time frame to take out the Streckeisen seismometers. Surface seismometers were originally placed at the site for a surface to borehole instrument noise study. Since we had collected a large amount of data on the comparison, we then removed the Streckeisens and left the KS36000i borehole instrument in place. What we see in the data during this time is only digitizer noise caused by the seismometers being disconnected. The Z, N , and E channels came back around 1993, 331, 02:30. FYI - The last Streckeisen data from RAR is day 1993,331. Channels ending in Z, N, and E are from the KS36000i. Channels ending in U, V, and W are from the Streckeisen instruments. SUPPLEMENT For the full duration of the data outages on the KS36000i channels (Z, N, E) please see ASL2003:118; for the full duration of the data outage on the STS1 channels (U, V, W) please see ASL2003:119. END **************************************************************************** DATA PROBLEM REPORT HRV1994:026 1994/04/17 Harvard WQC Misha Salganik ASL RPN II BHZ 1993,309,22:37:00 1993,309,22:37:00 Problem Description DEAD CHANNEL BHZ channel is dead. See postscript file in /pub/qc/qc_ps. END PROBLEM RESOLUTION REPORT HRV1994:026 1994/04/20 IDA Peter Davis Description of Problem Resolution Comment The vertical STS-1 sensor was replaced and became operational on 1994043 (Feb 12) END **************************************************************************** DATA PROBLEM REPORT HRV1994:023 1994/04/17 Harvard WQC Misha Salganik ASL ENH CD BHE BHN BHE LHN LHE LHZ 1993,292,04:43:00 1997,263,00:00:00 Problem Description OTHER LH* data are dropped out and BH* data look bad. See postscript file in /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1994:023 1994/04/25 ASL Tyler Storm Description of Problem Resolution RESOLUTION ENH was experiencing intermitten power and digitizer problems. I still notice digitizer problems at ENH, especially on the vertical channels, but maintenance trips are difficult and infrequent. SUPPLEMENT ENH was upgraded to an IRIS type station on 1997,263 which fixed all of the various digitizer problems which had been occurring. END **************************************************************************** DATA PROBLEM REPORT HRV1994:024 1994/04/17 Harvard WQC Misha Salganik ASL PMSA IU BHE LHE 1993,309,22:37:00 1993,309,22:37:00 Problem Description INVALID RESPONSE The amplitude of the seismograms on the BHE LHE channels is too small. See postscript file in /pub/qc/qc_ps. END PROBLEM RESOLUTION REPORT HRV1994:024 1994/04/20 ASL Tyler Storm Description of Problem Resolution Resolution The seismometer was dead; refer to resolution report HRV1994:018 for more details. END **************************************************************************** DATA PROBLEM REPORT DMC1994:010 1994/02/22 IRIS DMC Rick Benson DMC ALE II BHZ,BLZ 1992,224,00:00:00 1992,224,00:00:00 Problem Description DEAD CHANNEL Both the BHZ and BLZ components are dead, though BHN and BHE are fine. Postscript file is: ~ftp/pub/qc/qc_ps/DMC94:010_ps END **************************************************************************** DATA PROBLEM REPORT HRV1994:021 1994/04/17 Harvard WQC Misha Salganik GOPHER CCM IU LHN 1994,000,96:12:13 1994,000,96:12:13 Problem Description DATA GLITCHES See postscript file in /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1994:021 1994/08/16 ASL Tyler Storm Description of Problem Resolution COMMENT I'm not sure what these data glitches are at CCM, but they look a lot like the FIR filter impulse response. I sent an email message to the station engineer to get his opinion because it seems like he and I have discussed the problem before. If he has any input, I will pass it on in a supplemental report. SUPPLEMENT For more information on this problem, and the full time span, please see the PRR for HRV1993:031. END **************************************************************************** DATA PROBLEM REPORT ASL2000:030 2000/02/18 ASL DCC Valerie Peyton ASL RCBR IU 10/*H1 1999,263,17:42:00 1999,263,21:11:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The CMG3-T-B N component lost mass capture. END PROBLEM RESOLUTION REPORT ASL2000:030 2000/02/18 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The CMG3-T-B N component was recentered 1999,263,21:11. END **************************************************************************** DATA PROBLEM REPORT DMC1994:011 1994/02/22 IRIS DMC Rick Benson DMC ARU II BHE,BHZ 1990,093,00:00:00 1990,093,00:00:00 Problem Description DEAD CHANNELS Both the BHZ and BHE components are dead. I know they are fine on day 084 and day 118. Postscript file is: ~ftp/pub/qc/qc_ps/DMC1994:011_ps END PROBLEM RESOLUTION REPORT DMC1994:011 1994/04/21 IDA Peter Davis Description of Problem Resolution Comment This DPR correctly identifies a problem which exists in the IDA archive. It was caused by a bug in software once used to migrate reformatted field data from magnetic disk to the optical disk archive at the IDA DCC. Since SEED volumes to be transmitted to the IRIS DMC are written from data on optical disk, the error propagated to the DMC archive. The affected data are extremely easy to spot -- all points in the time series are set to zero, and as the DPR suggests, the channel appears dead -- so there is little chance the waveforms could be used in error. The original field data are being retrieved from DAT tapes and the optical disk records, re-written. The corrected data will then be shipped to the DMC. When this process is completed in the next 2-3 months, this PRR will be updated. END **************************************************************************** DATA PROBLEM REPORT HRV1994:022 1994/04/17 Harvard WQC Misha Salganik SPYDER DPC CZ LHZ LHN LHE 1994,097,00:00:00 1994,125,00:00:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 452 Timing IS in error, as clock is unlocked. Station time is slow by 5 sec. See postscript file in /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1994:022 1994/05/17 ASL Tyler Storm Description of Problem Resolution COMMENT The timing at DPC was still incorrect the last time I checked (13 May 94). The error is up to around a minute now. The station operator has just returned from being out of the country, and he is aware of the problem. I'll file a supplemetal when I hear from him again. SUPPLEMENT >From April 7, 1994 to May5, 1994 timing was very bad at station DPC, so the station operator withheld the data from distribution. The only available data during this time period is Spyder data, and all of it should be considered to have inaccurate time stamps. END **************************************************************************** DATA PROBLEM REPORT ASL2000:031 2000/02/24 ASL DCC Tyler Storm ASL MSKU IU 10/?HZ 2000,038,00:00:00 2003,172,10:15:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. Vertical data from the CMG3-T are unusable. END PROBLEM RESOLUTION REPORT ASL2000:031 2003/06/23 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION ASL field engineers were able to repair the Z channel of the CMG3-T during a station maintenance visit to MSKU. Data quality returns to normal at 2003, 172, 10:15. END **************************************************************************** DATA PROBLEM REPORT DMC1994:012 1994/02/25 IRIS DMC Rick Benson DMC COL DW *HE 1990,183,23:30:00 1991,063,00:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4525 Channel has spiking and other data glitches. This channel is basically dead during most of the day. Other components are fine, and this appears to be a transient. Postscript file is: ~ftp/pub/qc/qc_ps/DMC94:012.ps END PROBLEM RESOLUTION REPORT DMC1994:012 1994/04/07 ASL Tyler Storm Description of Problem Resolution RESOLUTION The LHE seismometer was vandalized during a break-in in mid 90. Due to severe weather conditions, the problem was not resolved until the station was upgraded in Mar of 91. END **************************************************************************** DATA PROBLEM REPORT ASL2000:032 2000/02/24 ASL DCC Tyler Storm ASL MSKU IU 00/?HN 1999,058,00:00:00 1999,058,00:00:00 Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE C 4510 Channel has frequent spiking. There are low-frequency spikes on the N/S data. END **************************************************************************** DATA PROBLEM REPORT DMC1994:013 1994/02/25 IRIS DMC Rick Benson DMC BJI IU BH[NZ] 1992,217,00:00:00 1992,217,00:00:00 Problem Description DEAD CHANNEL These channels are basically dead. BHE component is fine. Noisy, but fine. Postscript file is: ~ftp/pub/qc/qc_ps/DMC1994:013.ps END PROBLEM RESOLUTION REPORT DMC1994:013 1994/04/10 ASL Tyler Storm Description of Problem Resolution Resolution A Technician was adjusting the mass positions of the STS-1 seismometers at that time. END **************************************************************************** DATA PROBLEM REPORT HRV1994:020 1994/03/27 Harvard WQC Misha Salganik ASL TUC IU BHZ BHN BHE 1993,275,08:42:00 1993,275,08:42:00 Problem Description DATA GLITCHES See postscript file in /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1994:020 1994/04/10 ASL Tyler Storm Description of Problem Resolution Resolution The glitches were caused when the system locked back on to the timing standard. The difference between internal and external time was .133 seconds at that point, and the gap was caused when the system time jumped ahead to get back on track. END **************************************************************************** DATA PROBLEM REPORT ASL2000:033 2000/02/28 ASL DCC Valerie Peyton ASL INCN IU 00/?HZ 2000,045,00:01:00 2000,057,08:31:00 Problem Description DATA GLITCHES SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The STS1 (00) instrument at INCN has lost mass capture of Z, and the mass is floating high. Large events are still observable, but have a large positive offset. END PROBLEM RESOLUTION REPORT ASL2000:033 2000/02/28 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The STS1-Z was recentered 2000,057,08:31 and the data returned to normal quality. END **************************************************************************** DATA PROBLEM REPORT DMC1994:014 1994/03/02 IRIS DMC Rick Benson DMC CAY G MHE 1990,079,00:00:00 1990,079,00:00:00 Problem Description DATA LOGGER PROBLEM This channel is deviating wildly, with a fine example of this behavior in ~ftp/pub/qc/qc_ps/DMC1994:014.ps. Other channels appear to be functioning properly. END **************************************************************************** DATA PROBLEM REPORT ASL2000:034 2000/02/28 ASL DCC Valerie Peyton ASL PTGA IU 00/???, 10/???, 20/??? 1999,082,00:00:00 1999,100,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. Field engineers were performing station maintenance at PTGA during this time frame. Data quality and availability may be poor on any of the instruments during this time frame. END PROBLEM RESOLUTION REPORT ASL2000:034 2000/02/28 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Field engineers left the site in good condition on 1999, 100. END **************************************************************************** DATA PROBLEM REPORT DMC1994:015 1994/03/06 IRIS DMC Rick Benson DMC AGD G MH[EN] 1990,080,00:00:00 1990,080,00:00:00 Problem Description DEAD CHANNELS These two channels are dead. Postscript file is in ~ftp/pub/qc/qc_ps/DMC1994:015.ps on dmc. MHZ appears to be functioning properly. END **************************************************************************** DATA PROBLEM REPORT HRV1994:018 1994/03/27 Harvard WQC Misha Salganik ASL PMSA IU BHE 1993,284,15:54:00 1993,284,15:54:00 Problem Description DEAD CHANNEL ? END PROBLEM RESOLUTION REPORT HRV1994:018 1994/04/06 ASL Tyler Storm Description of Problem Resolution Resolution All channels from the East/West seismometer at PMSA were dead from 93,259 through 94,012 when the instrument was replaced. END **************************************************************************** DATA PROBLEM REPORT HRV1994:019 1993/03/27 Harvard WQC Misha Salganik ASL TAU DW LHN LHZ 1993,284,15:54:00 0931,284,05:00:00 Problem Description INCORRECT TIME AND DIGITIZER PROBLEM (?) See postscript file in /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1994:019 1994/04/10 ASL Tyler Storm Description of Problem Resolution Resolution A portion of the Analog to digital power supply was bad at this time. Timing was seldom accurate at TAU, for more information reference problem reports UW1993:002, and HRV1993:009. END **************************************************************************** DATA PROBLEM REPORT HRV1994:016 1994/03/27 Harvard WQC Misha Salganik ASL LZH CD BHZ BHN BHE LHZ LHE LHN 1993,278,05:09:00 1993,278,05:09:00 Problem Description DATA DROPOUTS See postscript file in /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1994:016 1994/04/21 ASL Tyler Storm Description of Problem Resolution Resolution The dropouts at LZH are caused by an unstable power source; see resolution HRV1994:005 for more detail. END **************************************************************************** DATA PROBLEM REPORT HRV1994:017 1994/03/27 Harvard WQC Misha Salganik ASL NRIL II BHN BHE 1993,292,04:02:00 1993,292,04:02:00 Problem Description DATA GLITCHES See postscript file in /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1994:017 1994/07/01 IDA Peter Davis Description of Problem Resolution COMMENT We assume that the data glitches to which this DPR refers are the transients which appear near the 30 (s?) mark of the Postscript illustration. They appear very narrow when passed through the SRO filter but have a period of nearly 500s in the broadband. These signals are typical of transients that are found on the horizontal records of nearly every NRIL field volume. Their precise origin is uncertain but are believed to be related to the mining operation there. END **************************************************************************** DATA PROBLEM REPORT HRV1994:014 1994/02/20 Harvard WQC Misha Salganik GOPHER KONO IU VHZ LHZ 1994,000,42:21:17 1994,000,42:21:17 Problem Description LOW FREQUENCY NOISE See postscript file in /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1994:014 1995/04/14 ASL Tyler Storm Description of Problem Resolution Comment I don't know what was causing the long-period pulses at KONO during this time frame. Later in the year, the vertical data became very noisy when the vacuum was completely lost in the bell jar containing vertical instrument. It's possible that the pulses were created when the bell jars first started to leak. See Problem Resolution Report HRV1994:050 for more detail. No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT HRV1994:015 1994/03/06 Harvard WQC Goran Ekstrom ASL VNDA GT VHZ VHN 1993,362,12:30:00 1993,362,12:30:00 Problem Description INCORRECT TIME for both channels in SEED header. The given start time for these channels is 1993/262/12:30 but data start earlier on day 1993/262 END PROBLEM RESOLUTION REPORT HRV1994:015 1994/03/07 ASL Tyler Storm Description of Problem Resolution Resolution The start times for both channels have been moved to 93, 262, 00:00 as of 7 Mar 94. END **************************************************************************** DATA PROBLEM REPORT HRV1994:012 1994/02/22 Harvard WQC Misha Salganik ASL GDH DW *H* 1993,244,15:39:00 1993,253,19:30:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 545 Time is 1 minute slow. Station time is slow by 1 minute. See postscript file in /pub/qc/qc_ps. END PROBLEM RESOLUTION REPORT HRV1994:012 2004/03/05 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION There is a short data gap in GDH between 1993, 246 and 1993, 253. When the data comes back up at 1993, 253, 19:30, the timing problem has been corrected. END **************************************************************************** DATA PROBLEM REPORT HRV1994:013 1994/02/20 Harvard WQC Misha Salganik ASL SJG IU BHZ BHN BHE 1993,270,13:37:00 1993,270,13:37:00 Problem Description LOW FREQUENCY NOISE Noisy looking impulses are separated by a minute.See postscript file in /pub/qc/qc_ps. END PROBLEM RESOLUTION REPORT HRV1994:013 1994/04/21 ASL Tyler Storm Description of Problem Resolution COMMENT The problem at SJG looks like high frequency noise to me (2hz). The noise could be caused by the nearby traffic. Unless I find something more conclusive, no further action will be taken. END **************************************************************************** DATA PROBLEM REPORT HRV1994:010 1994/01/20 Harvard WQC Misha Salganik GOPHER CTAO IU LHN 1900,000,00:00:00 1900,000,00:00:00 Problem Description LOW FREQUENCY NOISE Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1994:010 1994/04/10 ASL Tyler Storm Description of Problem Resolution Comment I have seen this anomaly at several stations. I am guessing that it is caused by pier/building settling, or something acting upon one of these structures. In all of the cases there is a semi-sharp offset followed by a slower recovery to a normal level. Unless I find something more conclusive, this will be the only action taken. END **************************************************************************** DATA PROBLEM REPORT HRV1994:011 1994/01/20 Harvard WQC Misha Salganik GOPHER PMG IU *HN *HE 00/*HN 00/*HE 1993,253,00:00:00 1993,253,00:00:00 Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE S 800 Station located in high noise background area. Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1994:011 1994/01/27 ASL Tyler Storm Description of Problem Resolution COMMENT Because of the station location (close to the coast) PMG has a high noise background. Cultural noise also contributes to the noise level for the twelve hour period from approximately 20:00 UTC through 10:00 UTC the following day (every day). END **************************************************************************** DATA PROBLEM REPORT HRV1994:007 1994/01/20 Harvard WQC Misha Salganik ASL ZOBO SR LHZ LHN LHE 1993,237,05:25:00 1993,237,05:25:00 Problem Description INCORRECT TIME Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1994:007 1994/04/07 ASL Tyler Storm Description of Problem Resolution Comment Yes, the timing appears to be off. I don't think the station operators were putting much effort into the SRO station at this time because they were busy setting up the GTSN station (LPAZ). The final data we received from ZOBO was on day 93,270. END **************************************************************************** DATA PROBLEM REPORT HRV1994:005 1994/01/20 Harvard WQC Misha Salganik ASL LZH CD BHZ BHN BHE 1993,220,08:34:00 1993,220,08:34:00 Problem Description DATA DROPOUTS Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1994:005 1994/04/21 ASL Tyler Storm Description of Problem Resolution Resolution The power at LZH, and most of the China Network, is somewhat unstable and prone to small outages. I think the dropouts we are seeing are associated with the power problem. END **************************************************************************** DATA PROBLEM REPORT HRV1994:006 1994/01/20 Harvard WQC Misha Salganik ASL LZH CD LHZ 1993,215,16:33:00 1993,215,16:33:00 Problem Description POLARITY REVERSED ? Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1994:006 1994/04/07 ASL Tyler Storm Description of Problem Resolution Comment I have compared LZH data with another CDSN station for an event on day 216, 93 and the vertical polarity appears to be correct. END **************************************************************************** DATA PROBLEM REPORT HRV1994:003 1994/01/20 Harvard WQC Misha Salganik ASL LPAZ GT BH* LH* VH* 1993,232,13:09:00 1998,148,05:13:00 Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE C 4521 Channel displays regular pulsing. Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1994:003 1994/01/25 ASL Tyler Storm Description of Problem Resolution COMMENT Since the LPAZ installation (93,232) we have noticed these pulses. A usual day contains between ten and twenty pulses on all components. The anomaly is much smaller on the vertical channels, but it is there. The pulses could be caused by surging power, the borehole settling, or any number of things. We won't know until a technician goes back to Bolivia, and there is not a trip scheduled in the near future. For the time being, we will have to live with the problem. SUPPLEMENT GT/LPAZ did not deliver data to ASL from 1998, 148 until 2003, 068. When the data began flowing again, the pulsing problem was radically reduced. Pulses were down to less than one a day on average. The problem is considered closed at the end of the 1998 data. END **************************************************************************** DATA PROBLEM REPORT HRV1994:004 1994/01/20 Harvard WQC Misha Salganik ASL LSA CD LHZ LHE LHN 1993,221,12:42:00 1993,221,12:42:00 Problem Description LOW FREQUENCY NOISE Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1994:004 1994/01/28 ASL Tyler Storm Description of Problem Resolution Resolution The noise noted in HRV1994:004 is a calibration. END **************************************************************************** DATA PROBLEM REPORT HRV1994:001 1994/01/20 Harvard WQC Misha Salganik ASL BJI CD LHZ BHZ 1993,222,00:51:00 1993,222,00:51:00 Problem Description DATA GLITCHES Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1994:001 1994/04/22 ASL Tyler Storm Description of Problem Resolution Comment The glitches on BJI look like a power problem, but they don't show up on all components at the same time. I have also seen the anomaly on VHN, and VHE when it did not occur on VHZ. It's a strange problem, but I don't know what is causing it. Unless I find something conclusive, no further action will be taken. END **************************************************************************** DATA PROBLEM REPORT HRV1994:002 1994/01/20 Harvard WQC Misha Salganik ASL BJI CD LHN LHE 1993,233,09:42:00 1993,233,09:42:00 Problem Description LOW FREQUENCY NOISE Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1994:002 1994/04/25 ASL Tyler Storm Description of Problem Resolution Comment I see these pulses on BJI quite often, but I do not know the source. I do not believe this is the typical power problem that the CDSN stations have because the onset is not very sharp. If I find something conclusive I will file a END **************************************************************************** DATA PROBLEM REPORT ASL2000:052 2000/03/02 ASL DCC Valerie Peyton ASL XAN IC BH?, LH?, UH?, VH? 1998,287,01:11:00 1999,040,11:13:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The STS1 instrument was inoperational beginning 1998,287. STS1 data are not useable for this time period. END PROBLEM RESOLUTION REPORT ASL2000:052 2000/03/02 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The STS1 was fixed 1999,040. END **************************************************************************** DATA PROBLEM REPORT ASL2000:054 2000/03/03 ASL DCC Valerie Peyton ASL BILL IU BHZ, LHZ, UHZ, VHZ 1998,349,08:36:00 1998,350,20:10:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The STS1-Z lost mass capture on 1998,349,08:36. END PROBLEM RESOLUTION REPORT ASL2000:054 2000/03/03 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The STS1-Z was recentered on 1998,350,20:10. END **************************************************************************** DATA PROBLEM REPORT ASL2000:055 2000/03/07 ASL DCC Valerie Peyton ASL DPC CZ * 1997,326,00:00:00 1997,346,00:00:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE C 4100 Channel is only rarely recorded. For this time period data is only available in pieces. We have most of the event data for this time span, but some may be missing. END PROBLEM RESOLUTION REPORT ASL2000:055 2000/03/07 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION We're not sure what caused the problem, but the station operator reported that there were problems retrieving the data from the tape it was recorded to. The operator did his best to "rescue" event data, and we have all that he was able to retrieve. On 1997,346 normal data acquisition resumed. END **************************************************************************** DATA PROBLEM REPORT ASL2000:056 2000/03/07 ASL DCC Valerie Peyton ASL DPC CZ * 1998,135,00:00:00 1998,169,00:00:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE C 4100 Channel is only rarely recorded. For this time period data is only available in pieces. We have most of the event data for this time span, but some event data may be missing. END PROBLEM RESOLUTION REPORT ASL2000:056 2000/03/07 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION We're not sure what caused the problem, but the station operator reported that there were problems retrieving the data from the tape it was recorded to. The operator did his best to "rescue" event data, and we have all that he was able to retrieve. On 1998,169 normal data acquisition resumed. END **************************************************************************** DATA PROBLEM REPORT ASL2000:057 2000/03/07 ASL DCC Tyler Storm ASL LCO IU ? 2000,008,17:50:52 2001,078,12:00:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 440 Clock Unlocked. Timing is off by one minute END PROBLEM RESOLUTION REPORT ASL2000:057 2001/10/02 ASL DCC Tyler Storm Description of Problem Resolution COMMENT LCO was inoperative for 143 days. When the station became operational again on 2001,221 timing was good. END **************************************************************************** DATA PROBLEM REPORT HRV2000:014 2000/05/06 Harvard WQC M. Nettles SBA IU 00/VH? 2000,125,00:00:00 2000,125,00:00:00 Problem Description INVALID RESPONSE Frequency at which the stage 1 sensitivity is given differs from the normalization frequency of stage 1. END PROBLEM RESOLUTION REPORT HRV2000:014 2000/05/31 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Currently, all instruments except the CMG3-T's have the A0 normalization frequency (fn) and the frequency of sensitivity (fs) for the non-FIR elements of the cascade defined at 0.02Hz except for the UH? channels where fs has been defined in the flat part of the response curve at 0.003hz. When CMG3-T instruments were first installed, it was decided to modify this convention slightly in order to define fn and fs closer to the center of the flat part of the response curve of the CMG3-T. For CMG3-T instruments, fn and fs are defined at 0.1Hz for the higher sample rates; then fs is defined out at 0.003Hz for both VH? and UH? channels. In retrospect it may have made more sense to simply define all the fn and fs values at about 0.04hz or so in order that both values would always be defined in the flat portion of the response curves for all channels of all instruments. If further discussion merits changing the whole system, we will do so. Otherwise, the fs and fn values are correct as they currently stand. END **************************************************************************** DATA PROBLEM REPORT DMC1994:049 1994/04/04 IRIS DMC Rick Benson DMC BNI MN VHN 1990,054,06:35:00 1990,271,00:00:00 Problem Description DATA GLITCHES There are high amplitude data glitches on this component approx. every two hours or so.Other components appear to be unaffected. Postscript file is in ~ftp/pub/qc/qc_ps/DMC1994:049.ps. END **************************************************************************** DATA PROBLEM REPORT HRV2000:013 2000/05/06 Harvard WQC M. Nettles CEH US BH? LH? 2000,000,76:15:19 2000,000,76:15:19 Problem Description DEAD CHANNELS Postscript file was placed into pub/qc/qc_ps END **************************************************************************** DATA PROBLEM REPORT HRV2000:012 2000/03/29 Harvard WQC M. Nettles GNI IU VHE-00 2000,000,56:01:43 2000,000,56:01:43 Problem Description INVALID RESPONSE stage 9 is incorrectly specified in the dataless SEED volume. possibly a problem for the previous calibration epoch as well. END PROBLEM RESOLUTION REPORT HRV2000:012 2000/04/06 ASL DCC George Slad Description of Problem Resolution RESOLUTION The response information for GNI has been corrected. The latest dataless SEED volume at the IRIS DMC reflects the change. END **************************************************************************** DATA PROBLEM REPORT HRV2000:011 2000/03/03 Harvard WQC M. Nettles PAYG IU LH1-00 LH2-00 VH1-00 VH2-00 2000,000,60:00:00 2000,000,60:00:00 Problem Description POLARITY REVERSED Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV2000:011 2000/04/21 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION The dataless SEED information has been changed to reflect the correct orientation. END **************************************************************************** DATA PROBLEM REPORT HRV2000:018 2000/06/19 Harvard WQC N.Maternovskaya ASL DAV IU BH-00 LH-00 2000,000,64:02:24 2000,000,64:02:24 Problem Description STRANGE SIGNAL. CALIBRATIONS? Postscript file was placed in /pub/qc/qc_ps. END PROBLEM RESOLUTION REPORT HRV2000:018 2000/06/20 ASL DCC Valerie Peyton Description of Problem Resolution COMMENT It is indeed a strange signal; it's not calibrations, it's poor instrument operation. The STS-1 at DAV has been producing varying degrees of low-quality data for quite some time now. For more information on the E/W component, please see ASL1999:010; for more information on the vertical component, please see ASL2000:074; for more information on the N/S component, please see ASL2000:099. Yet one more source of information on this station can be found at http://aslwww.cr.usgs.gov/Stations/stn_prblm_rprts/Problems.html (this page contains a listing of open station problems). Between political uncertainty in the region of the sensor's location and financial constraints, it is not clear when we will be able to send someone out to fix this instrument. The station operator has done what he can (he managed to get the N/S component working on 2000,073). END **************************************************************************** DATA PROBLEM REPORT HRV2000:017 2000/06/19 Harvard WQC N.Maternovskaya ASL BILL IU LHN-00 LHE-00 BHN-00 BHE-00 2000,000,28:14:21 2000,000,28:14:21 Problem Description LOW FREQUENCY NOISE Postscript file was placed in /pub/qc/qc_ps. END PROBLEM RESOLUTION REPORT HRV2000:017 2000/06/20 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The problem with the data pictured in HRV2000_017.ps is that a large spike occurred on the horizontals, simultaneously with the onset of the event. The spike is roughly 300 seconds in width. Looking at two weeks of data surrounding this event, it is apparent that spikes like this occurr every 2-3 days. They are not event-induced. My best guess is that they are a function of the station's location. For more information on background noise levels and potential disturbances at BILL, please see ASL2000:076. END **************************************************************************** DATA PROBLEM REPORT HRV2000:016 2000/06/10 Harvard WQC M. Nettles BTDF MS LHE LHN VHE VHN 1999,000,63:00:00 1999,000,63:00:00 Problem Description POLARITY REVERSED Postscript file was placed in /pub/qc/qc_ps. END PROBLEM RESOLUTION REPORT HRV2000:016 2000/06/15 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The dataless now reflects the N and E polarity reversals at BTDF. END **************************************************************************** DATA PROBLEM REPORT HRV2000:015 2000/05/18 Harvard WQC M. Nettles RAIO IU UH? VH? LHZ LHN 1998,000,84:00:00 1998,000,84:00:00 Problem Description INVALID RESPONSE Frequency at which the stage 1 sensitivity is given differs from the normalization frequency of stage 1. END PROBLEM RESOLUTION REPORT HRV2000:015 2000/05/31 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION There was a mistake in how the responses were defined for the LHZ and LHN channels, and we are grateful for it having been found. This mistake has been corrected. The UH? and VH? responses are also correct. Currently, all instruments except the CMG3-T's have the A0 normalization frequency (fn) and the frequency of sensitivity (fs) for the non-FIR elements of the cascade defined at 0.02Hz except for the UH? channels where fs has been defined in the flat part of the response curve at 0.003hz. When CMG3-T instruments were first installed, it was decided to modify this convention slightly in order to define fn and fs closer to the center of the flat part of the response curve of the CMG3-T. For CMG3-T instruments, fn and fs are defined at 0.1Hz for the higher sample rates; then fs is defined out at 0.003Hz for both VH? and UH? channels. In retrospect it may have made more sense to simply define all the fn and fs values at about 0.04hz or so in order that both values would always be defined in the flat portion of the response curves for all channels of all instruments. If further discussion merits changing the whole system, we will do so. Otherwise, the fs and fn values are correct as they currently stand. END **************************************************************************** DATA PROBLEM REPORT ASL2000:060 2000/03/07 ASL DCC Valerie Peyton ASL CTAO IU BHE, LHE, UHE, VHE 1998,218,02:20:00 1998,240,01:22:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The STS1 E component has lost mass capture (beginning 1998,218,02:20). END PROBLEM RESOLUTION REPORT ASL2000:060 2000/03/07 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The E component of the STS1 at CTAO was fixed on 1998,240,01:22. Data are no fine. END **************************************************************************** DATA PROBLEM REPORT DMC1994:041 1994/03/23 IRIS DMC Rick Benson DMC PAB IU VM? 1993,357,00:00:00 1993,357,00:00:00 Problem Description DEAD CHANNELS All three VM channels are dead. Postscript file is in ~ftp/pub/qc/qc_ps/DMC1994:041.ps. END PROBLEM RESOLUTION REPORT DMC1994:041 1994/04/06 ASL Tyler Storm Description of Problem Resolution Resolution The VLP mass position channels at PAB appear dead because they are not hooked up. The next time PAB software is edited, we will change the configuration so these channels are not recorded. END **************************************************************************** DATA PROBLEM REPORT HRV1994:078 1994/12/22 Harvard WQC Misha Salganik ASL SNZO IU LHN LHZ 1994,210,22:56:00 1994,210,22:56:00 Problem Description Problem Description DATA DROPOUTS See postscript file in /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1994:078 1995/01/03 ASL Tyler Storm Description of Problem Resolution Comment We don't know what is causing the dropouts on the vertical, and North/South channels at SNZO. I have seen this problem a couple times at a few different stations, but we haven't been able to find the cause. No further action will be taken unless we can determine the cause of the problem. END **************************************************************************** DATA PROBLEM REPORT DMC1994:042 1994/03/23 IRIS DMC Rick Benson DMC GSC TS BHE,BHN 1990,333,20:56:00 1990,333,20:15:00 Problem Description LOW FREQUENCY NOISE The horizontals have around a 300sec wobble in the data on these two components, giving them the appearance of being mirror images. Postscript file is in ~ftp/pub/qc/qc_ps/DMC94:042.ps. END PROBLEM RESOLUTION REPORT DMC1994:042 1994/04/10 ASL Tyler Storm Description of Problem Resolution Comment This is a good example of coherent noise. This disturbance was most likely caused by some outside force making the seismometer pier tilt. These instruments are so sensitive to tilt that they can detect the slightest structural deformation, whatever the cause (pressure, temperature, etc.). END **************************************************************************** DATA PROBLEM REPORT HRV1994:079 1995/01/03 ASL Tyler Storm TBT IU LHN VHN 1994,340,00:00:00 1994,340,00:00:00 Problem Description LOW FREQUENCY NOISE See postscript file in /pub/qc/qc_ps/HRV94:079.ps END PROBLEM RESOLUTION REPORT HRV1994:079 1995/01/03 ASL Tyler Storm Description of Problem Resolution Comment I don't know what is going on with the TBT data during this time frame. I had looked into this problem a few weeks ago, but then it stopped. There will be two technicians passing through TBT in a couple of weeks. They are aware problem that occurred on the vertical channels from approximately 6 Dec 94 through 15 Dec 94, as well as some more current problems. I will file a supplemental report when our technicians give us a TBT status report SUPPLEMENT 1995/06/30 ASL Tyler Storm Description of Problem Resolution Resolution The data was degraded due to severe corrosion. See PROBLEM RESOLUTION REPORT ASL1995:001 for more detail. END **************************************************************************** DATA PROBLEM REPORT DMC1994:043 1994/04/04 IRIS DMC Rick Benson DMC GNI IU *HN 1992,185,15:16:00 1992,312,17:17:00 Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE C 4620 Incorrect instrument response for low frequencies only This horizontal has an approximately 800 sec sin wave signal riding on the data. Nice and symetrical. Postscript file is in ~ftp/pub/qc/qc_ps/DMC94:043.ps. END PROBLEM RESOLUTION REPORT DMC1994:043 1994/04/10 ASL Tyler Storm Description of Problem Resolution RESOLUTION The signal is a calibration on the north/south channel. SUPPLEMENT The signal turned out to be a resonance problem in the instrument. It appears that the instrument may have been set to an incorrect resonance mode, causing it to resonate heavily at ~0.003 Hz. This resonance varied in amplitude, growing to the point that it appeared to be a calibration. Regardless of amplitude, the resonance pretty much dominantes the data during this whole time period. This resonance destroys the instrument response from 0.46Hz down through all the low frequencies, making it too high or too low by 2dB to 40dB. After a long data outage, the data returns at 1992, 312, 17:17 with normal data quality and the resonance problem fixed. END **************************************************************************** DATA PROBLEM REPORT HRV1994:076 1994/12/14 Harvard WQC Misha Salganik SPYDER PAB IU LHZ 1994,348,07:28:00 1994,348,07:28:00 Problem Description DATA GLITCH See postscript file in /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1994:076 2003/06/16 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Looking at the LHZ data from PAB from 1994, 348, there are a couple of long period swings in the data. This is normal for the station. No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT HRV2000:019 2000/06/19 Harvard WQC N.Maternovskaya ASL KURK II LHN LHE BHN BHE 2000,000,75:06:35 2000,000,75:06:35 Problem Description LOW FREQUENCY NOISE Postscript file was placed in /pub/qc/qc_ps. END **************************************************************************** DATA PROBLEM REPORT HRV1994:077 1994/12/22 Harvard WQC Misha Salganik ASL PMSA IU LHN BHN 1994,194,02:35:00 1994,194,02:35:00 Problem Description Problem Description LOW FREQUENCY NOISE See postscript file in /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1994:077 1995/01/03 ASL Tyler Storm Description of Problem Resolution Resolution Disturbances that look like this example (with surface instruments) are usually caused by "tilt" when the station operator is working in the vault. No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT DMC1994:045 1994/04/04 IRIS DMC Rick Benson DMC WMQ IU BH? 1990,146,08:00:00 1990,146,08:00:00 Problem Description DEAD CHANNELS It appears that all Chinese Digital Seismic Network data is zeroed out during Nuclear testing episodes. Many such events bear this out. END PROBLEM RESOLUTION REPORT DMC1994:045 1994/04/07 ASL Tyler Storm Description of Problem Resolution Resolution The current agreement with the Chinese states that they can distribute whatever data they see fit. In the past we have not received the data segments recorded during Chinese nuclear tests. Unless the joint cooperation is renegotiated in the future, I would expect to see this pattern continue. END **************************************************************************** DATA PROBLEM REPORT HRV1994:074 1994/12/22 Harvard WQC Misha Salganik ASL MLAC TS BHN BHE LHN LHE 1994,194,02:35:00 1994,194,02:35:00 Problem Description LOW FREQUENCY NOISE See postscript file in /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1994:074 1995/07/15 ASL Tyler Storm Description of Problem Resolution COMMENT This type of coherent noise is usually caused by the pier tilting in some manner. These noise levels are characteristic for this site. No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT DMC1994:046 1994/04/04 IRIS DMC Rick Benson DMC SPA IU VHE,VHN 1992,136,00:00:00 1994,045,00:00:00 Problem Description LOW FREQUENCY NOISE Both components (horizontals) have a similar freq signal overriding good signal at about 200 secs. In the case of the N-S component, this large amplitude signal appears to be squared off on the top, too. Vertical appears to be fine. Postscript file is in ~ftp/pub/qc/qc_ps/DMC1994:046.ps. END PROBLEM RESOLUTION REPORT DMC1994:046 1994/04/06 ASL Tyler Storm Description of Problem Resolution Resolution Since installation, SPA data has been plagued with many noise problems, most of which came from a cycling heater. Several changes have been made to the seismometer's environment since Feb 94, and now the data looks dramatically better. The "squared off top" problem was most likely when the mass was against a stop. I have not observed this problem since the most recent changes. END **************************************************************************** DATA PROBLEM REPORT HRV1994:075 1994/12/22 Harvard WQC Misha Salganik ASL MSVF II LHN LHE LHZ 1994,182,19:50:00 1994,182,19:50:00 Problem Description Problem Description DATA GLITCHES See postscript file in /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1994:075 1995/01/05 IDA Peter Davis Description of Problem Resolution RESOLUTION During the week of 1994182-1994188, tests were performed at the station to explore sources of RF interference nearby. During the course of these tests the data logger was shut down repeatedly. The spike observed in this DPR is typically seen when power to the logger is toggled on/off. END **************************************************************************** DATA PROBLEM REPORT HRV1994:072 1994/12/22 Harvard WQC Misha Salganik SPYDER HNR IU VHZ 1994,349,11:20:00 1994,349,11:20:00 Problem Description Problem Description LOW FREQUENCY NOISE See postscript file in /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1994:072 1995/06/27 ASL Tyler Storm Description of Problem Resolution Resolution The data is OK. The big glitch that shows up before the event on VHZ was apparently some sort of transmission error. I pulled the same time segment from our mass store, and it looked fine. END **************************************************************************** DATA PROBLEM REPORT ASL2000:067 2000/03/16 ASL DCC Valerie Peyton ASL COLA IU 00/VH2, 00/UH2, 00/LH2, 00/BH2 2000,076,10:20:00 2000,080,18:30:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4600 Channel has low sensitivity. PERCENT On 2000, 076, 10:20 the E component of the 00 instrument (a KS54000 borehole seismometer) lost half of the double-ended output. As a result, the response of this channel is now roughly 20dB lower than it should be (the sensitivity is now APPROXIMATELY 90% lower than it should be). The data may be useable with caution. This problem will probably not be fixed until we have a chance to replace the instrument. END PROBLEM RESOLUTION REPORT ASL2000:067 2000/03/21 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The problem turned out to be a loose connector, which was fixed by the station operator on 2000,080,18:30. Component 2 (nominal E) of the 00 instrument (KS54000 borehole instrument) is now back to 100% sensitivity. Although it is not as quiet as component 1 (nominal N), it is at least back to its previous level of operation. END **************************************************************************** DATA PROBLEM REPORT DMC1994:048 1994/04/04 IRIS DMC Rick Benson DMC SSB G VHN 1990,097,00:00:00 1990,097,00:00:00 Problem Description DEAD CHANNEL Other components look like they are working fine. Postscript file is in ~ftp/pub/qc/qc_ps/DMC1994:048.ps. END **************************************************************************** DATA PROBLEM REPORT HRV1994:073 1994/12/22 Harvard WQC Misha Salganik ASL LPAZ GT LHN LHE 1994,182,10:12:00 1994,182,10:12:00 Problem Description LOW FREQUENCY NOISE See postscript file in /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1994:073 1994/12/30 ASL Tyler Storm Description of Problem Resolution COMMENT We still have not found what is causing the pulses at LPAZ; see PROBLEM RESOLUTION REPORT HRV1994:003. Whatever the case, the seismometer will probably not be "pulled" specifically for this problem. END **************************************************************************** DATA PROBLEM REPORT ASL2000:068 2000/03/17 ASL DCC Valerie Peyton ASL KMI IC HHE, SHE, 10/BHE, 10/LHE, 10/HHE 1996,145,00:00:00 2001,146,17:37:00 Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE C 4500 Channel has high noise background. The E component of the STS2 instrument at KMI is slowly degrading. The low frequency noise is gradually getting worse (the amplitude is increasing, and the frequency content is broadening). By early 2000, the noise has increased to the point that it is higher than the high frequency content. END PROBLEM RESOLUTION REPORT ASL2000:068 2006/06/19 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The noise on the E component of the KMI STS2 is gone as of 2001, 146, 17:37. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2000:069 2000/03/17 ASL DCC Valerie Peyton ASL WVT IU *** 1997,106,00:00:00 1997,106,00:00:00 Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE S 800 Station located in high noise background area. Station WVT is located in a high-noise area. Station WVT has had high amplitude high frequency noise on the horizontal channels since installation. For the most part, this noise has a diurnal pattern, with the worst noise occuring from roughly 13:00 to 24:00 Zulu (7:00 to 18:00 local time, when not on day-light savings). On occasion, the low frequency noise also affects the vertical. END PROBLEM RESOLUTION REPORT ASL2000:069 2000/03/17 ASL DCC Valerie Peyton Description of Problem Resolution COMMENT Unfortunately, there is not much we can do about the noise, short of relocating the station. This station is not maintained by ASL; ASL simply helps get the data from WVT to the DMC, and serves in an advisory capacity for station maintanence when asked to by the operator. No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT HRV1994:080 1994/12/22 Harvard WQC Misha Salganik ASL DBIC GT *HE 1994,168,00:00:00 1994,277,16:20:00 Problem Description OTHER SEED COMMENT REFERENCE C 4010 Channel is down. There is unusually large difference between EW record and theoretical seismogram END PROBLEM RESOLUTION REPORT HRV1994:080 1995/01/03 ASL Tyler Storm Description of Problem Resolution RESOLUTION The data from the East/West component at DBIC has been inoperative since the station was installed. In late Sept 94 the borehole instrument was "overhauled". Since this time, the East/West data appears to be OK. END **************************************************************************** DATA PROBLEM REPORT DMC1994:040 1994/03/23 IRIS DMC Rick Benson DMC MLAC TS BL? 1993,150,00:00:00 1993,150,00:00:00 Problem Description DEAD CHANNEL All three BL channels are dead, I think. I'm comparing them to other low gain stations in the area where I DO see signal. Postscript file is in ~ftp/pub/qc/qc_ps/DMC94:040.ps. END PROBLEM RESOLUTION REPORT DMC1994:040 1994/04/08 ASL Tyler Storm Description of Problem Resolution COMMENT The Terrascope personnel are aware of the lower trigger rate at MLAC, but they do not believe there is a problem. MLAC is the most isolated station in the Terrascope array. Consequently, the station does not trigger for as many "cultural noies" events as the others. Also, depending on where a quake occurs, all of the stations in the Terrascope set may not get a strong enough signal to trigger the low gain. SUPPLEMENT The event shown in DMC94:040.ps was too small to trigger the accelerometer at MLAC. However, several other events did trigger that instrument on the same day. The instrument appears to have been working properly. END **************************************************************************** DATA PROBLEM REPORT HRV2000:021 2000/06/19 Harvard WQC N.Maternovskaya ASL XAN IC LHN-00 2000,000,28:14:21 2000,000,28:14:21 Problem Description MISSING DATA FOR THIS CHANNEL Postscript file was placed in /pub/qc/qc_ps. END PROBLEM RESOLUTION REPORT HRV2000:021 2000/06/19 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION XAN has a number of short data dropout on all six channels on 2000,028 and 2000,029. The dropouts last 30 - 50 minutes. We are missing north data on the 00 instrument from 14:26 to 14:59. The other five channels drop out at different times around this time (one as early as 14:23), but they all come back at 14:59. The reason for these outages is unknown. This outage sequence appears to be isolated, so no further action will be taken. END **************************************************************************** DATA PROBLEM REPORT HRV2000:020 2000/06/19 Harvard WQC N.Maternovskaya ASL RCBR IU BH-00 2000,000,28:14:21 2000,000,28:14:21 Problem Description DATA DROPOUTS Postscript file was placed in /pub/qc/qc_ps. END PROBLEM RESOLUTION REPORT HRV2000:020 2000/06/19 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION RCBR had a number of equipment problems, including trouble with its modems and comm link during the month of January 2000. Thus, there are numerous data dropouts throughout January and into early February. The various pieces of malfunctioning equipment have either been repaired or replaced and data retrieval is now much improved. We are grateful for the patience and help of the station operators as the problems were diagnosed and fixed, and we hope to see fewer dropouts in the future. END **************************************************************************** DATA PROBLEM REPORT HRV2000:003 2000/02/04 Harvard WQC N.Maternovskaya ASL SFJ IU LHN-00 LHE-00 BHN-00 BHE-00 1999,265,00:14:00 1999,265,00:14:00 Problem Description Problem Description LOW FREQUENCY NOISE Postscript file was placed into /pub/qc/qc_ps # END PROBLEM RESOLUTION REPORT HRV2000:003 2000/02/18 ASL DCC Valerie Peyton Description of Problem Resolution COMMENT Yes, there often is low signal to noise for this station. Please see ASL1996:028. END **************************************************************************** DATA PROBLEM REPORT HRV2000:002 2000/02/04 Harvard WQC N.Maternovskaya ASL RCBR IU LH1-10 1999,263,17:47:00 1999,263,17:47:00 Problem Description Problem Description DIGITIZER JUMP Postscript file was placed into /pub/qc/qc_ps # END PROBLEM RESOLUTION REPORT HRV2000:002 2000/02/18 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The CMG3-T-B N mass (10/LH1) is against the stops at this point in time. Please also see ASL2000:030. END **************************************************************************** DATA PROBLEM REPORT HRV2000:001 2000/02/04 Harvard WQC N. Maternovskaya ASL MAKZ IU 00/LHE, 00/BHE 1999,258,03:01:00 1999,258,03:01:00 Problem Description LOW FREQUENCY NOISE Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV2000:001 2000/02/22 ASL DCC Valerie Peyton Description of Problem Resolution COMMENT There is an unacceptable amount of low frequency noise, which could also be characterized as spiking (c.f. ASL1998:021). It could be a result of moisture in the works somewhere (either the sensor or digitizer) as this particular vault is rarely very dry. We'll see what can be done to fix the problem. END **************************************************************************** DATA PROBLEM REPORT HRV2000:007 2000/02/04 Harvard WQC N.Maternovskaya ASL POHA IU BH-00 1999,319,05:42:00 1999,319,05:42:00 Problem Description Problem Description DIGITIZER PROBLEM Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV2000:007 2000/02/17 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Yes indeed, this is digitizer noise. This station was installed on 1999, 317, and testing was not complete until 1999, 331. For more information, please see ASL2000:001. END **************************************************************************** DATA PROBLEM REPORT HRV2000:006 2000/02/04 Harvard WQC N.Maternovskaya ASL NRIL II LHE LHN 1999,286,01:33:00 1999,286,01:33:00 Problem Description Problem Description STARANGE LP PULSE Postscript file was placed into /pub/qc/qc_ps # END **************************************************************************** DATA PROBLEM REPORT HRV2000:005 2000/02/04 Harvard WQC N.Maternovskaya ASL JTS II LHZ 1999,321,03:27:00 1999,321,03:27:00 Problem Description Problem Description DATA GLITCHES Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV2000:005 2000/02/07 IDA Peter Davis Description of Problem Resolution RESOLUTION The cause of this problem is covered under DPR IDA2000:004. There were occasional glitches on the BHZ,LHZ and VHZ channels due to the board malfunction. END **************************************************************************** DATA PROBLEM REPORT HRV1994:069 1994/11/11 Harvard WQC Misha Salganik ASL MLAC TS LHN LHE 1994,144,00:46:00 1994,144,00:46:00 Problem Description LOW FREQUENCY NOISE The station is very noisy in the CMT (T> 45 s) frequency band. See postscript file in /pub/qc/qc_ps. END PROBLEM RESOLUTION REPORT HRV1994:069 1995/07/15 ASL Tyler Storm Description of Problem Resolution RESOLUTION MLAC is a noisy station. This example is fairly normal background at the station. No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT ASL2000:070 2000/03/20 ASL DCC Tyler Storm ASL CASY IU 00/?HZ 1999,361,00:00:00 2000,105,10:06:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The vertical channels from the STS-1 are unusable (flooded vault). END PROBLEM RESOLUTION REPORT ASL2000:070 2001/03/20 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION Instrument mass was centered and data are back to normal at 2000,105,10:06:00. END **************************************************************************** DATA PROBLEM REPORT HRV2000:004 2000/02/04 Harvard WQC N.Maternovskaya ASL XAN IC LHE-10 1999,258,03:01:00 1999,258,03:01:00 Problem Description Problem Description DIGITIZER PROBLEM Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV2000:004 2000/02/17 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION We have only digitizer noise recorded from the 10 sensor (STS2) for this station for the time period 1999,245,00:00 - 1999,295,00:00. The cause is unknown. Please also see ASL2000:029. END **************************************************************************** DATA PROBLEM REPORT ASL2000:071 2000/03/20 ASL DCC Tyler Storm ASL CASY IU 10/?H? 1999,326,08:21:00 2002,356,11:30:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. All channels from the STS-2 are unusable (flooded vault). END PROBLEM RESOLUTION REPORT ASL2000:071 2003/08/18 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The three STS2 channels at CASY are fully recovered from the vault flooding by 2002, 356, 11:30. Two of the channels recover before this time, and the individual channel recovery times are listed below, but the entire instrument is considered to be functioning normally and producing data with normal quality only when the third channel has fully recovered. Z 2002,345,01:54 N 2002,356,11:30 E 2002,331,00:51 END **************************************************************************** DATA PROBLEM REPORT DMC1994:052 1994/04/23 IRIS DMC Rick Benson DMC CCM IU LH? 1989,257,19:00:00 1989,257,20:00:00 Problem Description DATA GLITCHES All three components have a similar signal on them, that of an electronic input signal of some sort, though none like Ive ever seen. (Most likely its calibration pulses, with unusual signal decay) These occur during the 1900 hour. Postscript file is in ~ftp/pub/qc/qc_ps/DMC94:052.ps. END PROBLEM RESOLUTION REPORT DMC1994:052 1994/05/19 ASL Tyler Storm Description of Problem Resolution Resolution The "glitches" on CCM are either calibrations, frequency response tests, or free period modulation tests; most likely the latter. Whatever the case, it was induced by a human and reflects no equipment problems. END **************************************************************************** DATA PROBLEM REPORT HRV1994:067 1994/11/04 Harvard WQC Misha Salganik ASL YAK IU LHN LHE 1993,243,00:00:00 1999,200,02:30:00 Problem Description POLARITY REVERSED See postscript file in /pub/qc/qc_ps. END PROBLEM RESOLUTION REPORT HRV1994:067 1994/12/12 ASL Tyler Storm Description of Problem Resolution Comment It looks like the horizontal polarities at YAK have been reversed since installation. They will remain reversed until one of our technicians can go to the station and fix the problem. Until the polarities are corrected, no further action will be taken. END **************************************************************************** DATA PROBLEM REPORT ASL2000:072 2000/03/20 ASL DCC Valerie Peyton ASL BILL IU BHN, LHN, UHN, VHN 1997,227,00:39:00 1997,233,18:36:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The N component of the STS1 instrument at BILL lost mass capture beginning 1997,227,00:39. END PROBLEM RESOLUTION REPORT ASL2000:072 2000/03/20 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The N component of the STS1 instrument at BILL was recentered 1997,233,18:36. END **************************************************************************** DATA PROBLEM REPORT DMC1994:053 1994/04/23 IRIS DMC Rick Benson DMC AFI IU LHZ 1991,096,00:00:00 1991,108,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE C 4010 Channel is down. This one component appears to have a calibration pulse occurring at least during the 1400 hour, but it also appears to be clipped. It overrides an event at 14:29 or so. Postscript file is in ~ftp/pub/qc/qc_ps/DMC94:053.ps. END PROBLEM RESOLUTION REPORT DMC1994:053 1994/05/19 ASL Tyler Storm Description of Problem Resolution Resolution AFI had problems from 1991,094 through 1991,107 (refer to problem resolution report DMC1994:055 for more details). It looks like someone was overdriving a calibration signal during the specific time mentioned in this problem report. END **************************************************************************** DATA PROBLEM REPORT HRV1994:068 1994/11/11 Harvard WQC Misha Salganik ASL CALB TS LHE LHN 1994,144,00:46:00 1994,144,00:46:00 Problem Description LOW FREQUENCY NOISE The station is very noisy in the CMT (T> 45 s) frequency band.See postscript file in /pub/qc/qc_ps. END PROBLEM RESOLUTION REPORT HRV1994:068 1995/07/15 ASL Tyler Storm Description of Problem Resolution Resolution CALB was set up to record aftershocks from the 17 Jan 94 quake. If I remember correctly, the instruments are set up in somebody's garage. Due to the station's location, the data is going to be very noisy. No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT ASL2000:073 2000/03/21 ASL DCC Tyler Storm ASL QIZ CD BHZ 2000,047,04:54:00 2000,128,04:33:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. BHZ channel is dead. END PROBLEM RESOLUTION REPORT ASL2000:073 2001/07/23 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The station operator fixed the BHZ channel on the STS1 at QIZ on 2000,128. Data quality has returned to normal. END **************************************************************************** DATA PROBLEM REPORT HRV2000:009 2000/02/04 Harvard WQC N.Maternovskaya ASL SPA IU 00/LHN, 00/BHN 1999,291,02:43:00 1999,291,02:43:00 Problem Description VERY LARGE PULSE Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV2000:009 2000/02/17 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The pulse you see is a result of recentering the N mass. Since this station sits on a mobile ice sheet, the vault tilts on a regular basis, causing the horizontal seismometer components to lose capture frequently. As a result, these instruments often require recentering. Unfortunately, this particular recentering occurred at the same time as the onset of an event. Please also see ASL2000:027. END **************************************************************************** DATA PROBLEM REPORT DMC1994:054 1994/04/23 IRIS DMC Rick Benson DMC TOL DW BH* 1990,290,14:40:00 1990,320,08:15:00 Problem Description TIME TEARS SEED COMMENT REFERENCE C 4150 Channel data has time tears. The time tears occur every 33 seconds. The time window Im aware of occurs during the 2100 hour. Postscript file is in ~ftp/pub/qc/qc_ps/DMC94:054.ps. END PROBLEM RESOLUTION REPORT DMC1994:054 1994/08/17 ASL Tyler Storm Description of Problem Resolution RESOLUTION During this time frame, TOL had an incorrect board within the system that could not deal with the BH data. The gaps measured 16.5 seconds (1 BH record). Total time span that this problem covered was from 1990, 290, 14:40 through 1990, 320, 08:15. END **************************************************************************** DATA PROBLEM REPORT HRV1994:065 1994/11/04 Harvard WQC Misha Salganik SPYDER FFC II LHN LHZ LHE 1994,291,17:12:00 1994,291,17:12:00 Problem Description LOW FREQUENCY NOISE See postscript file in /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1994:065 1994/11/04 IDA Peter Davis Description of Problem Resolution RESOLUTION We have observed that, for stations at high-latitude, the mass position undergoes a period of rapid (1 Volt/week or more) drift when the ground freezes in the fall or thaws in the spring. This happened again this year, and the operator was requested to re-center the masses of all three STS-1s. The signal noted in this DPR is the transient associated with the operator's work. Review of a much longer time series shows the sensors rapidly returned to normal after the operator completed his work. END **************************************************************************** DATA PROBLEM REPORT ASL2000:074 2000/03/21 ASL DCC Tyler Storm ASL DAV IU 00/?HZ 2000,038,01:40:00 2000,354,16:22:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. Data from the vertical STS-1 instrument are unusable. Seismometer has lost mass capture. END PROBLEM RESOLUTION REPORT ASL2000:074 2001/02/16 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION The instrument was centered at 2000,354,16:22 UTC. END **************************************************************************** DATA PROBLEM REPORT HRV2000:008 2000/02/04 Harvard WQC N.Maternovskaya ASL POHA IU LHZ-00 LH1-00 BH2-00 BH1-00 1999,321,03:27:00 1999,321,03:27:00 Problem Description Problem Description LOW FREQUENCY NOISE Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV2000:008 2000/02/17 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION This station was installed on 1999, 317, and testing was not complete until 1999, 331. For more information, please see ASL2000:001. END **************************************************************************** DATA PROBLEM REPORT DMC1994:055 1994/04/25 IRIS DMC Rick Benson DMC AFI IU LH? 1991,094,00:00:00 1991,108,00:00:00 Problem Description DEAD CHANNELS Postscript file is in ~ftp/pub/qc/qc_ps/DMC1994:055.ps. END PROBLEM RESOLUTION REPORT DMC1994:055 1994/05/19 ASL Tyler Storm Description of Problem Resolution Resolution AFI experienced some equipment problems (probably lh amps, or D to A converter) day 94 of 1991. LHZ was inoperative through day 108 of 1991. The horizontal channels experienced intermittent outages throughout this time frame. END **************************************************************************** DATA PROBLEM REPORT HRV1994:066 1994/11/04 Harvard WQC Misha Salganik SPYDER SJG IU LHN 1994,300,17:45:00 1994,300,17:45:00 Problem Description LOW FREQUENCY NOISE The LHN channel is too noisy.See postscript file in /pub/qc/qc_ps. # END PROBLEM RESOLUTION REPORT HRV1994:066 1994/11/07 ASL Tyler Storm Description of Problem Resolution Resolution The noise is from a nearby road. Refer to problem resolution report HRV1993:027 for more detail. END **************************************************************************** DATA PROBLEM REPORT ASL2000:075 2000/03/21 ASL DCC Valerie Peyton ASL JOHN IU 10/?H1 2000,023,16:43:00 2003,309,07:14:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4605 Channel has low sensitivity. Channel 1 (nominal N) of the CMG3-T-B (10 instrument) is losing half of the double-ended output. The problem is intermittant, occurring sometimes a couple times a week and other times a couple times a day. Each episode lasts for anywhere from one to several hours. During these episodes, the response of this channel is roughly 20dB lower than it should be (the sensitivity of the channel drops to approximately 90% lower than it should be). Data between episodes is fine. This problem is probably the result of a lose connector. We'll see if it's possible to fix it. END PROBLEM RESOLUTION REPORT ASL2000:075 2003/11/06 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The CMG3-T-B at JOHN was replaced with a working instrument. Since the 54000 borehole instrument was also broken beyond on-site repair, the data streams from the working CMG3-T-B were moved to location code 00. Data quality returns to normal at 2003, 309, 07:14. END **************************************************************************** DATA PROBLEM REPORT DMC1994:056 1994/04/25 IRIS DMC Rick Benson DMC SNZO IU LH? 1990,177,00:00:00 1990,260,00:00:00 Problem Description DEAD CHANNELS Postscript file is in ~ftp/pub/qc/qc_ps/DMC1994:056.ps. END PROBLEM RESOLUTION REPORT DMC1994:056 1994/05/18 ASL Tyler Storm Description of Problem Resolution Resolution From 1990, 177 through 1990, 260, the station was inoperative. When SNZO came back up again, the horizontal channels were dead due to a digitizer problem. The station operated in this partial mode until the IRIS-2 updgrade (1991, 100). END **************************************************************************** DATA PROBLEM REPORT HRV1994:063 1994/11/04 Harvard WQC Misha Salganik ASL BJT CD BHN BHE LHN LHE 1994,154,06:57:00 1994,154,06:57:00 Problem Description POLARITY REVERSED See postscript file in /pub/qc/qc_ps. END PROBLEM RESOLUTION REPORT HRV1994:063 1994/11/09 ASL Tyler Storm Description of Problem Resolution Resolution The horizontal polarities at BJT are correct. When the BJI station was first moved to the BJT location, I assumed the polarity reversal tagged along. As a result, I set up the SEED headers to reflect reversed polarities on the horizontal channels. After I analyzed the data and found the polarities were correct, I changed the polarity information in the SEED headers back to the normal values. The Harvard group analyzed several days of data where the incorrect (reverved) polarity values were stated in the data header. When the data polarity was "flipped", per the SEED header, the data which had started out correct was then incorrect. Wow, that's a mouthful. To summarize: BJT polarities are correct (always have been), and the mistake was mine not the Harvard group's. END **************************************************************************** DATA PROBLEM REPORT ASL2000:076 2000/03/21 ASL DCC Valerie Peyton ASL BILL IU BH*, LH*, VH*, UH*, 00/*H* 1995,228,00:00:00 1995,228,00:00:00 Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE C 4500 Channel has high noise background. All three of the components of the STS1 sensor at BILL are subject to a high level of low frequency noise. This is a function of the location: the sensors are located on a pier on the surface (0m depth) underneath an apartment building built on stilts. Beneath the apartment and the pier is a layer of rubble ~10m thick, which sits on permafrost and prevents structures from sinking into the permafrost. The recording equipment is located in the apartment directly above the pier, and when one walks in the aparment, the motion is recorded on the sensor. Gold is mined in the vicinity, adding to the local noise levels, particularly in the sumemr. Mining activity continues through the winter, but produces less noise during this season. In addition, this area is subject to high winds and long storms. The "quiet" times for this station are winter, and local nighttime. The situation may improve if the station is ever moved. END PROBLEM RESOLUTION REPORT ASL2000:076 2000/06/21 ASL DCC Valerie Peyton Description of Problem Resolution COMMENT Unless BILL is moved, the high background noise level will not be resolved. END **************************************************************************** DATA PROBLEM REPORT HRV1994:064 1994/11/04 Harvard WQC Misha Salganik ASL ENH CD BHZ BHE BHN 1994,181,09:23:00 1994,181,09:23:00 Problem Description DATA DROPOUTS See postscript file in /pub/qc/qc_ps # END PROBLEM RESOLUTION REPORT HRV1994:064 1994/11/07 ASL Tyler Storm Description of Problem Resolution Comment The dropouts are most likely caused by the typical power problems which occur at most of the China stations. See problem resolution report HRV1993:093 for more detail. No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT ASL2000:077 2000/03/23 ASL DCC George Slad ASL BILL IU 00/*HZ, 00/VMZ 2000,012,13:41:00 2000,014,20:07:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The vertical STS1 lost mass capture. The data are unusable during this time period. END PROBLEM RESOLUTION REPORT ASL2000:077 2000/03/23 ASL DCC George Slad Description of Problem Resolution RESOLUTION The station operators reset the mass position. The STS1 vertical is resumes normal operation after the end time of the DPR END **************************************************************************** DATA PROBLEM REPORT HRV1994:061 1993/11/04 Harvard WQC Misha Salganik ASL ADK IU LHN LHE LHZ 1994,122,17:14:00 1994,122,17:14:00 Problem Description DATA DROPOUTS LH* data record is too short.See postscript file in /pub/qc/qc_ps. # END PROBLEM RESOLUTION REPORT HRV1994:061 1994/11/08 ASL Tyler Storm Description of Problem Resolution Resolution ADK Data was lost from 2 May 94, 17:27 through 18 May 94. The cause of the outage is unknown. The time window in question overlapped into the beginning of the outage. END **************************************************************************** DATA PROBLEM REPORT ASL2000:078 2000/03/23 ASL DCC George Slad ASL GUMO IU 10-?HE, 10-?HN 2000,057,08:11:00 2000,058,02:25:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The Guralp CMG3-T horizontal components lost mass capture at the onset of an earthquake. The data are unusable during this time period. END PROBLEM RESOLUTION REPORT ASL2000:078 2000/03/23 ASL DCC George Slad Description of Problem Resolution RESOLUTION The station operator reset the seismometer. The Guralp CMG3-T resumes normal operation afterwards. END **************************************************************************** DATA PROBLEM REPORT HRV1994:062 1994/11/04 Harvard WQC Misha Salganik ASL ANTO IU BHN BHE BHZ LHE LHN LHZ 1994,154,21:06:00 1994,154,21:06:00 Problem Description INCORRECT TIME Station's clock is delayed by 15 sec.See postscript file in /pub/qc/qc_ps. END PROBLEM RESOLUTION REPORT HRV1994:062 1994/12/12 ASL Tyler Storm Description of Problem Resolution Resolution A GSP receiver was installed at ANTO 15 July 94. Since this date, we have not detected any timing problems. Prior to the GSP installation the timing at ANTO was unreliable (see PROBLEM RESOLUTION REPORT HRV1993:055 for more information). END **************************************************************************** DATA PROBLEM REPORT ASL2000:079 2000/03/24 ASL DCC George Slad ASL KIEV IU **-*** 2000,060,01:00:00 2000,075,11:40:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 520 Time may be in error by several seconds. The GPS signal received by the station has degraded to a point at which timing has become unreliable. END PROBLEM RESOLUTION REPORT ASL2000:079 2000/03/24 ASL DCC George Slad Description of Problem Resolution RESOLUTION The GPS clock has locked onto the GPS satelite signals, with the highest possible signal quality factor, and has remained so for the past week. We do not have any knowledge of maintenance occurring during this time period and, therefore, we do not have an explanation for the improvement in GPS signal received. END **************************************************************************** DATA PROBLEM REPORT HRV1994:070 1994/05/29 Harvard WQC Misha Salganik ASL SNCC TS LHN 1994,149,14:11:00 1994,149,14:11:00 Problem Description POLARITY REVERSED See postscript file in /pub/qc/qc_ps. END **************************************************************************** DATA PROBLEM REPORT HRV1994:071 1994/12/22 Harvard WQC Misha Salganik SPYDER DPC IU LHN LHE 1994,348,07:28:00 1994,348,07:28:00 Problem Description Problem Description DATA GLITCHES See postscript file in /pub/qc/qc_ps. END PROBLEM RESOLUTION REPORT HRV1994:071 1995/05/25 ASL Tyler Storm Description of Problem Resolution Comment I don't know what is causing the glitches. They are most likely originating in the digitizer because of power fluctuations. No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT DMC1994:050 1994/04/04 IRIS DMC Rick Benson DMC AGD G VH? 1990,097,00:00:00 1990,097,00:00:00 Problem Description DEAD CHANNELS All three components appear dead. Postscript file is in ~ftp/pub/qc/qc_ps/DMC1994:050.ps. END **************************************************************************** DATA PROBLEM REPORT DMC1994:051 1994/04/23 IRIS DMC Rick Benson DMC CCM IU LM? 1993,159,00:00:00 1993,159,00:00:00 Problem Description DEAD CHANNEL These mass position sensors appear to have problems to the point of possibly being dead. (The noise appears to be low amplitude). Postscript file shows how nicely the LH sensors recorded an event, but the LM sensors dont. Postscript file is in ~ftp/pub/qc/qc_ps/DMC94:051.ps. END PROBLEM RESOLUTION REPORT DMC1994:051 1994/08/11 ASL Tyler Storm Description of Problem Resolution Resolution The LM* channels at CCM were up and running during this time frame. There is just not much movement associated with these channels. Unless there is a problem, about the only thing you will ususally see is earth tide. Unlike the VM* channels, the LM* do not have an extra X 4 gain step. This is another reason why the channels may appear dead from a glance; they only change a few counts. I made a plot of one day of LMZ, and VMZ for an example. Postscript file is in ~ftp/pub/qc/qc_ps/DMC1994:051_prr.ps. END **************************************************************************** DATA PROBLEM REPORT HRV2000:010 2000/02/04 Harvard WQC N.Maternovskaya ASL TIXI IU 00/LHN, 00/BHN 1999,298,20:31:00 1999,298,20:31:00 Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE C 4500 Channel has high noise background. Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV2000:010 2000/02/16 ASL DCC Valerie Peyton Description of Problem Resolution COMMENT The problem has already been cited in problem report ASL1997:027. END **************************************************************************** DATA PROBLEM REPORT DMC1994:027 1994/03/06 IRIS DMC Rick Benson DMC TLY II VHE 1993,079,00:00:00 1993,079,00:00:00 Problem Description DATA GLITCHES This component has large data glitches throughtout this day Postscript file is in DMC1994:027.ps. END PROBLEM RESOLUTION REPORT DMC1994:027 1994/03/15 IDA Peter Davis Description of Problem Resolution Comment These data glitches appear on both VHE and BHE starting on 1993039 and persist until 1993238 at which time they diminish greatly in amplitude. They can, however, be seen sporadically after that date. Their exact cause is unknown. END **************************************************************************** DATA PROBLEM REPORT DMC1994:028 1994/03/08 IRIS DMC Rick Benson DMC PFO TS UH[EN],VH? 1993,038,00:00:00 1993,039,00:00:00 Problem Description DATA GLITCHES These components have large data glitches occurring approximately every 52 minutes or so on 5 of the 6 U and V components. Postscript files are in DMC1994:028.ps and DMC1994:028.ps.b. END PROBLEM RESOLUTION REPORT DMC1994:028 1994/08/09 ASL Tyler Storm Description of Problem Resolution Comment The glitches on the PFO channels look similar to what happens when periodic environmental changes are occurring in the vault, such as with a cycling heater. In this case, I do not know what was causing the anomaly. If we find an explanation, I will file a supplemental report. END **************************************************************************** DATA PROBLEM REPORT ASL2000:080 2000/03/24 ASL DCC Valerie Peyton ASL ANMO IU LHU, LHV, LHW 1997,022,16:22:00 1997,113,17:45:00 Problem Description OTHER SEED COMMENT REFERENCE C 4105 Seismometer not connected to digitizer. On 1997,022,16:2 as a result of an emergent need for a CMG3-T-B at station MIDW, the ANMO CMG3-T-B was disconnected and removed from the borehole. Unfortunately, we only shut down collection of the BH? and HH? data streams from this seismometer, and mistakenly continued to collect LH? data for a seismometer that no longer existed. Thus, for roughly three months we recorded digitizer noise on the LHU/V/W channels. END PROBLEM RESOLUTION REPORT ASL2000:080 2000/03/24 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION On 1997,113,17:45 the data collection mistake at ANMO was caught and corrected. We are no longer collecting LHU/V/W digitizer noise for a non-existent instrument. END **************************************************************************** DATA PROBLEM REPORT HRV1994:058 1994/10/17 Harvard WQC Misha Salganik SPYDER TAU II VHZ VHN VHE 1994,289,05:10:00 1994,289,05:10:00 Problem Description DATA DROPOUTS The time window selected by the automatic dial up system is too short.See postscript file in /pub/qc/qc_ps. END PROBLEM RESOLUTION REPORT HRV1994:058 1994/10/31 IDA Peter Davis Description of Problem Resolution RESOLUTION The problem noted in this DPR was common to all SPYDER requests for IRIS/IDA data which had not yet been recorded. The version of software for responding to SPYDER and all IDADRM requests was designed to send all data held in the disk loops (either in La Jolla or at the station) at the moment a request was received. In this case, a request for five hours of post-event TAU VH* data was issued two hours after the origin time. Apparently only 30sec of VH* data were available and transmitted. The software has now been modified to hold SPYDER requests until all data requested are available. This fix should be in place for requests serviced on or after November 2, 1994. END **************************************************************************** DATA PROBLEM REPORT ASL2000:081 2000/03/29 ASL DCC Tyler Storm ASL JOHN IU 10/?H1 2000,068,19:28:00 2000,145,06:32:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. Data from the 1 component of the CMG3-T-B are unusable. END PROBLEM RESOLUTION REPORT ASL2000:081 2000/07/21 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION Instrument has been reset. END **************************************************************************** DATA PROBLEM REPORT HRV1994:059 1994/10/17 Harvard WQC Misha Salganik SPYDER FFC II LHN 1994,271,16:39:00 1994,271,16:39:00 Problem Description DATA DROPOUTS The time window selected by the automatic dial up system is too short.See postscript file in /pub/qc/qc_ps. END PROBLEM RESOLUTION REPORT HRV1994:059 1994/10/31 IDA Peter Davis Description of Problem Resolution RESOLUTION The postscript file alluded to in this DPR was never made available to us, and given the terse description of the problem, we can only speculate as to its nature. Very likely, this problem is related intimately to the one described in HRV1994:058. Please see PRR HRV1994:058 for our response. **************************************************************** DATA PROBLEM REPORT IDA1994:014 94/10/13 IDA DCC Peter Davis IDA TLY II *** 94,185 - 94,289 Problem Description INCORRECT TIME The external clock failed at TLY on 1994185. We will notify when it is replaced. Seismic data quality remains very good. END **************************************************************************** DATA PROBLEM REPORT ASL2000:082 2000/03/31 ASL DCC Tyler Storm ASL GUMO IU 10/?HN, 10/?HE 2000,070,11:24:00 2000,074,04:42:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. Horizontal data from the CMG3-T are unusable. END PROBLEM RESOLUTION REPORT ASL2000:082 2000/03/31 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION Instrument was re-centered 2000,074,04:42:00. END **************************************************************************** DATA PROBLEM REPORT HRV1994:056 1994/09/20 Harvard WQC Misha Salganik ASL YAK IU ALL 1994,100,23:45:00 1994,100,23:45:00 Problem Description OTHER The coordinates of the station provided by the ASL data tapes in April 94 ( lat= 62.017, long= 129.717 ) differ from the coordinates on the data tapes for May 94 (lat = 61.010 ,long = 129.430 ). It seems that the April's data are not correct. END PROBLEM RESOLUTION REPORT HRV1994:056 1995/01/05 ASL Tyler Storm Description of Problem Resolution Resolution The coordinates that we presently have in the database for YAK are 62.0167 N, 129.7167 E. This location is the most accurate information we have for now (this came from the NEIC's Seismograph Station Codes and Coordinates, 1985 Edition). When a GPS receiver is installed at YAK we will probably change the coordinates to reflect the more accurate reading. END **************************************************************************** DATA PROBLEM REPORT ASL2000:083 2000/04/11 ASL DCC Tyler Storm ASL MAKZ IU 00/?HZ 2000,072,00:00:00 2000,111,06:00:00 Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE C 4500 Channel has high noise background. Data from the vertical STS-1 instrument have very large low-frequency noise. Most likely the bell jar containing this instrument has lost vacuum. END PROBLEM RESOLUTION REPORT ASL2000:083 2000/07/07 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION The bell jar problem has been resolved and the low-frequency noise levels are back to normal for MAKZ. END **************************************************************************** DATA PROBLEM REPORT DMC1994:020 1994/03/06 IRIS DMC Rick Benson DMC ISA TS UME 1992,185,00:00:00 1992,185,00:00:00 Problem Description DEAD CHANNEL This component is dead. Postscript file is in ~ftp/pub/qc/qc_ps/DMC1994:020.ps. END **************************************************************************** DATA PROBLEM REPORT HRV1994:057 1994/10/17 Harvard WQC Misha Salganik SPYDER BDFB GT LHZ LHN LHE 1994,289,05:10:00 1994,289,05:10:00 Problem Description DATA DROPOUTS The time window selected by the automatic dial up system is too short.See postscript file in /pub/qc/qc_ps. END PROBLEM RESOLUTION REPORT HRV1994:057 1994/10/26 ASL Tyler Storm Description of Problem Resolution Resolution Data from BDFB arrives at ASL near real-time, and is immediately forwarded to NEIC to be used in the hypocenters. Sometimes there are gaps the data. The com link between ASL and the station is "smart" enough to locate the gaps and retransmit the data so we can eventually have the complete data set. However, NEIC does not get this version of the data. Unless we start transferring GTSN data to NEIC in a different manner, you can expect to see the occasional data dropouts for all the GTSN stations. END **************************************************************************** DATA PROBLEM REPORT ASL2000:084 2000/04/18 ASL DCC Tyler Storm ASL SDV IU ? 1999,310,00:00:00 1999,347,00:00:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 440 Clock Unlocked. Clock is "unlocked" from GPS timing standard. Timing is in question. END PROBLEM RESOLUTION REPORT ASL2000:084 2004/03/15 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The timing problem at SDV ends at 1999, 347, 00:00. Unfortunately, so to do the data. When the data returns on 2000, 103, the clock is still good and timing quality is normal. END **************************************************************************** DATA PROBLEM REPORT DMC1994:021 1994/03/06 IRIS DMC Rick Benson DMC LON IU SHZ 1993,109,00:00:00 1993,109,00:00:00 Problem Description DATA GLITCHES This component has awkward data glitches during an event at 01:11. Data appears fine otherwise, and only occurs during the event. Postscript file is in ~ftp/pub/qc/qc_ps/DMC1994:021.ps. END PROBLEM RESOLUTION REPORT DMC1994:021 1994/04/10 ASL Tyler Storm Description of Problem Resolution Resolution The station had a power supply problem; refer to problem report HRV1993:069 for more info. END **************************************************************************** DATA PROBLEM REPORT HRV1994:054 1994/09/20 Harvard WQC Misha Salganik SPYDER TBT IU LHN VHN 1994,240,18:37:00 1994,240,00:00:00 Problem Description Problem Description LOW FREQUENCY NOISE See postscript file in /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1994:054 1995/04/20 ASL Tyler Storm Description of Problem Resolution Comment We are guessing that the pulses are somehow related to the corrosion problem in the electronic feedback boxes (ref. ASL1995:001 for more detail). A new set of instruments is scheduled to be installed sometime this year. Hopefully the pulses will disappear once all of the damaged equipment has been replaced. END **************************************************************************** DATA PROBLEM REPORT ASL2000:085 2000/05/01 ASL DCC George Slad ASL SPA SS **/*** 1996,343,00:00:00 2001,005,20:00:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 7100 Response information not available at this time. The response information given is invalid. The instrument recording is a gravimeter, not an STS1. The Albuquerque Seismological Laboratory awaits receipt of appropriate response information from those individuals responsible for the station. END PROBLEM RESOLUTION REPORT ASL2000:085 2001/08/30 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Acquisition of data from the gravimeters at SPA ended near the end of the day on 2001,005. We have never received the correct response information for these instruments; unfortunately, at this point it seems unlikely that we ever will. The gravimeters were inoperational for much of the time that their data was being recorded. On-site repairs were attempted multiple times, but never were successful. The instruments were taken out of service as a result of the inability to repair them. END **************************************************************************** DATA PROBLEM REPORT DMC1994:022 1994/03/06 IRIS DMC Rick Benson DMC GSC TS UMN 1992,181,00:00:00 1992,183,07:30:00 Problem Description DATA GLITCHES SEED COMMENT REFERENCE C 4525 Channel has spiking and other data glitches. This component has high amplitude data glitches on this component. They are also very regular. Postscript file is in ~ftp/pub/qc/qc_ps/DMC94:021.ps. END PROBLEM RESOLUTION REPORT DMC1994:022 1994/04/20 ASL Tyler Storm Description of Problem Resolution Comment The positive pulses on GSC, UMN might have be caused by a power problem. The channel returns to normal around 92, 183, 07:30. No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT HRV1994:055 1994/09/20 Harvard WQC Misha Salganik ASL WMQ CD LHZ LHN LHE 1994,000,95:09:35 1994,000,95:09:35 Problem Description OTHER THERE IS A SEQUENCE OF SPIKES INSTEAD OF THE SIGNAL END PROBLEM RESOLUTION REPORT HRV1994:055 1995/04/20 ASL Tyler Storm Description of Problem Resolution Resolution The channels are dead during that time frame. No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT ASL2000:086 2000/05/05 ASL DCC Valerie Peyton ASL FURI IU * 2000,083,06:00:00 2000,126,09:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE S 10 Station is down. One of the power modules in the data acquisition system burned out. The system has been turned off to prevent further damage to the station. A new data acquisition system has been shipped. Until it is installed, the station FURI will be off-line. END PROBLEM RESOLUTION REPORT ASL2000:086 2000/05/31 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The replacement data acquisition system was installed at FURI on 2000,126 and normal data acquisition resumed. END **************************************************************************** DATA PROBLEM REPORT DMC1994:023 1994/03/06 IRIS DMC Rick Benson DMC KIV II BHZ 1990,093,00:00:00 1990,093,00:00:00 Problem Description DEAD CHANNEL This component is dead. Postscript file is in ~ftp/pub/qc/qc_ps/DMC1994:023.ps. END PROBLEM RESOLUTION REPORT DMC1994:023 1994/04/21 IDA Peter Davis Description of Problem Resolution Comment See DMC1994:011. END **************************************************************************** DATA PROBLEM REPORT HRV1994:052 1994/09/20 Harvard WQC Misha Salganik SPYDER BDFB GT LHZ LHE LHN 1994,256,10:01:00 1994,256,10:01:00 Problem Description DATA DROPOUTS See postscript file in /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1994:052 1994/10/26 ASL Tyler Storm Description of Problem Resolution Resolution Data from BDFB arrives at ASL near real-time, and is immediately forwarded to NEIC to be used in the hypocenters. Sometimes there are gaps the data. The com link between ASL and the station is "smart" enough to locate the gaps and retransmit the data so we can eventually have the complete data set. However, NEIC does not get this version of the data. Unless we start transferring GTSN data to NEIC in a different manner, you can expect to see the occasional data dropouts for all the GTSN stations. END **************************************************************************** DATA PROBLEM REPORT ASL2000:087 2000/05/30 ASL DCC Valerie Peyton ASL MSKU IU 10/*** 2000,129,00:00:00 2002,163,00:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. All three masses of the CMG3-T (10) instrument at MSKU are pegged. The problem likely will not be soluble until we can send a field engineer out to this station. END PROBLEM RESOLUTION REPORT ASL2000:087 2002/08/02 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION ASL field engineers were at MSKU and managed to resurrect the N component of CMG3-T. The Z component is still pegged (see also ASL2000:031) and the E component has lost half of its double-ended output (see also ASL2002:076). N data quality returns to normal at 2002, 163, 00:00. We will have to wait for another opportunity to visit the station before Z and E data quality can improve. END **************************************************************************** DATA PROBLEM REPORT DMC1994:024 1994/03/06 IRIS DMC Rick Benson DMC ALE II VHZ 1992,200,00:00:00 1992,200,00:00:00 Problem Description DEAD CHANNEL This component is dead. This is different than DPR DMC94:010 where BHZ and BLZ were reported. Postscript file is in ~ftp/pub/qc/qc_ps/DMC94:024.ps. END **************************************************************************** DATA PROBLEM REPORT HRV1994:053 1994/09/20 Harvard WQC Misha Salganik ASL SPA IU LHN 1994,000,96:12:12 1994,112,23:37:00 Problem Description LOW FREQUENCY NOISE See postscript file in /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1994:053 1994/10/26 ASL Tyler Storm Description of Problem Resolution Resolution The mass of the N/S seismometer at SPA was against a stop from 21 Mar 94, 12:12 through 22 Apr 94, 23:37 when the mass was centered. Data from the N/S instrument is useless during this time frame. END **************************************************************************** DATA PROBLEM REPORT DMC1994:025 1994/03/06 IRIS DMC Rick Benson DMC KEV DW BHE LHE 1988,183,16:42:00 1989,140,05:24:00 1989,140,05:24:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4525 Channel has spiking and other data glitches. This component is dead. Postscript file is in ~ftp/pub/qc/qc_ps/DMC94:025.ps. END PROBLEM RESOLUTION REPORT DMC1994:025 1994/04/07 ASL Tyler Storm Description of Problem Resolution RESOLUTION The BHE component at KEV was not completely dead during this time frame, but the analog to digital converter was beginning to fail. The faulty component was replaced on day 111, 89. SUPPLEMENT The component replacement that took place on 1989, 111 did not completely resolve the problems with the digitizer. These problems appear rather to have been solved at 1989, 140, 05:24. END **************************************************************************** DATA PROBLEM REPORT HRV1994:050 1994/07/23 Harvard WQC Misha Salganik DMC KONO IU LHZ 1994,195,18:38:00 1994,195,18:38:00 Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE C 1850 Sensor has lost vacuum containment. See postscript file in /pub/qc/qc_ps. END PROBLEM RESOLUTION REPORT HRV1994:050 1994/09/06 ASL Tyler Storm Description of Problem Resolution SUPPLEMENT The bell jar containing the vertical instrument at KONO lost vacuum many months ago. To remedy the problem, the station operator evacuated the bell jars on 26 Aug 94. The vertical data looks much better now. END **************************************************************************** DATA PROBLEM REPORT ASL2000:089 2000/06/05 ASL DCC Valerie Peyton ASL KONO IU **/*** 2000,121,09:00:00 2000,293,20:28:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 770 Clock is Unlocked. The station KONO was struck by lightning on 2000,121. The strike incapacitated one or more of the following: the GPS receiver, the inline amplifiers between the receiver and the antenna, the GPS antenna. Replacement parts for all of the above have been shipped to the station and will be installed upon receipt. Until then, the timing is off (by 2000,156 timing had drifted by roughly 25 minutes). END PROBLEM RESOLUTION REPORT ASL2000:089 2001/03/01 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION After much work and the replacement of many parts, the station operator was able to repair the GPS system damage done by the lightning strike. GPS timing of the data was re-established at KONO late in the day on 2000, 293. END **************************************************************************** DATA PROBLEM REPORT HRV1994:051 1994/07/23 Harvard WQC Misha Salganik DMC WRAB II LHE 1994,195,18:38:00 1994,195,18:38:00 Problem Description DATA GLITCHES See postscript file in /pub/qc/qc_ps. END PROBLEM RESOLUTION REPORT HRV1994:051 1994/07/25 IDA Peter Davis Description of Problem Resolution RESOLUTION The spike noted in HRV1994:051 is characteristic of a problem that has existed on the BHE, LHE, and VHE channels at WRAB since installation. The first spike was observed on 1994:088 and subsequent ones have recurred at a periodicity of 1.94 days since. The problem is related to the functioning of an EPROM in the data acquisition system. This chip is scheduled to be replaced in the near future. We will advise when this has been done. In the meantime we will continue to flag data in which these spikes appear. END **************************************************************************** DATA PROBLEM REPORT HRV1994:060 1994/10/30 Harvard WQC Misha Salganik ASL GRFO IU VH* 1994,248,00:00:00 1994,248,00:00:00 Problem Description OTHER Dataless SEED volume produced by the ASL contains wrong coordinates for GRFO. The values of the station's coordinates for the other channels are correct. END PROBLEM RESOLUTION REPORT HRV1994:060 1995/04/20 ASL Tyler Storm Description of Problem Resolution RESOLUTION The location for the VH channels at GRFO was corrected shortly after I received the problem report (I don't have the specific date). Using the latest version of the GRFO dataless will correct the problem. END **************************************************************************** DATA PROBLEM REPORT DMC1994:038 1994/03/23 IRIS DMC Rick Benson DMC MLAC TS ?HZ 1993,146,10:19:00 1993,359,08:17:00 Problem Description DATA GLITCHES SEED COMMENT REFERENCE C 4521 Channel displays regular pulsing. This component has very bad glitching every 4 mins 50 secs or so. Two postscript perspectives can be found in ~ftp/pub/qc/qc_ps/DMC94:038.ps and DMC94:038.b.ps. (Difference between the two is the time window plotted) END PROBLEM RESOLUTION REPORT DMC1994:038 1994/04/18 ASL Tyler Storm Description of Problem Resolution COMMENT I do not know what caused the problem with MLAC data on day 150 of 1993. Due to a problem with the DAT, we were only able to extract up to day 149 from the tape we received. SUPPLEMENT The Z component of the MLAC STS2 displayed a variety of regular pulsing for just over 200 days of 1993. The source of this pulsing is unknown, and period varies from just over a minute to roughly 5 minutes. It is most noticeable in the lower-sample rate data streams. END **************************************************************************** DATA PROBLEM REPORT DMC1994:039 1994/03/23 IRIS DMC Rick Benson DMC TUC IU VM? 1993,150,00:00:00 1993,150,00:00:00 Problem Description DEAD CHANNELS All three VM channels are dead. Postscript file is in ~ftp/pub/qc/qc_ps/DMC1994:039.ps. END PROBLEM RESOLUTION REPORT DMC1994:039 1994/04/08 ASL Tyler Storm Description of Problem Resolution Resolution I realize these channels look dead because they are only moving a few (if any) counts per day, but this is deceiving. In this type of seismometer the mass theoretically doesn't move, and the mass position channel tracks where the mass is located. In the past, these channels have appeared to have been more active, but those channels where being recorded at a much higher gain. The more recent systems are using an 8-bit digitizer with a lower gain for the mass position channels. As a result, the data fluctuates very little, and the channels may appear dead. END **************************************************************************** DATA PROBLEM REPORT HRV2000:022 2000/07/25 Harvard WQC M. Nettles RAIO IU LH? VH? 1996,317,16:59:00 1996,317,16:59:00 Problem Description POLARITY REVERSED Postscript file was placed in /pub/qc/qc_ps. END PROBLEM RESOLUTION REPORT HRV2000:022 2000/08/22 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION There was a misprint in the poles and zeroes as written in the dataless for RAIO: the final zero was missing a negative sign. The dataless has been updated. END **************************************************************************** DATA PROBLEM REPORT HRV1994:049 1994/07/06 Harvard WQC Misha Salganik ASL KIP IU BHN LHN 1994,054,14:17:00 1994,054,16:58:00 Problem Description HIGH FREQUENCY NOISE SEED COMMENT REFERENCE C 4525 Channel has spiking and other data glitches. See postscript file in /pub/qc/qc_ps. END PROBLEM RESOLUTION REPORT HRV1994:049 1994/08/09 ASL Tyler Storm Description of Problem Resolution COMMENT We do not know what caused the high-frequency noise at KIP during this time frame. No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT ASL2000:090 2000/06/06 ASL DCC Valerie Peyton ASL AFI IU **/*HE **/*HN 1981,137,00:00:00 1981,137,00:00:00 Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE S 800 Station located in high noise background area. Station AFI has a strong diurnal trend which is manifested by very high levels of low frequency noise on the horizontals from roughly 17:00 to 06:00 the following morning (Zulu). This corresponds to a local time of 5:00 to 18:00 each day. END PROBLEM RESOLUTION REPORT ASL2000:090 2000/06/06 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Unless station AFI is moved, there will be no way around the diurnal low frequency noise. END **************************************************************************** DATA PROBLEM REPORT ASL2000:091 2000/06/09 ASL DCC Valerie Peyton ASL ANMO IU LHU BHU HHU 1995,358,03:15:00 1996,040,17:33:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The U component of the CMG3-T-B at ANMO is against the stop. END PROBLEM RESOLUTION REPORT ASL2000:091 2000/06/09 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The CMG3-T-B at ANMO was centered on 1996,040,17:33. END **************************************************************************** DATA PROBLEM REPORT HRV1994:047 1994/07/06 Harvard WQC Misha Salganik DMC COL IU LHN LHE 1994,182,19:50:00 1994,182,19:50:00 Problem Description LOW FREQUENCY NOISE See postscript file in /pub/qc/qc_ps. END PROBLEM RESOLUTION REPORT HRV1994:047 1994/08/09 ASL Tyler Storm Description of Problem Resolution Comment The noise on the horizontals at COL during this time is not unusual. I don't know why they are this noisy, but it is pretty much normal for the station. No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT ASL2000:092 2000/06/09 ASL DCC Valerie Peyton ASL ANMO IU LHV BHV HHV 1995,335,15:15:00 1996,040,17:33:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The V component of the CMG3-T-B at ANMO is against the stop. END PROBLEM RESOLUTION REPORT ASL2000:092 2000/06/09 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The CMG3-T-B at ANMO was centered on 1996,040,17:33. END **************************************************************************** DATA PROBLEM REPORT HRV1994:048 1994/07/06 Harvard WQC Misha Salganik ASL GNI IU LHN LHZ LHE BHN BHZ BHE 1994,043,08:33:00 1994,055,15:14:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 452 Timing IS in error, as clock is unlocked. See postscript file in /pub/qc/qc_ps. END PROBLEM RESOLUTION REPORT HRV1994:048 1994/08/24 ASL Tyler Storm Description of Problem Resolution Comment Yes, I agree the timing was off at GNI. The error appeared to be a little over 40 seconds. I looked at another event from Iran (26 Feb 94) and the timing was off by a similar amount. I also checked out events on 1 Mar 94, and 14 Mar 94; the timing seemed correct. I do not have easy access to the GNI log files, so it is difficult to figure out what is going on with the timing during this time frame. I will send a message to the station personnel to see if they were aware of a problem, and to ask them to check the timing standard more frequently. END **************************************************************************** DATA PROBLEM REPORT ASL2000:093 2000/06/12 ASL DCC Valerie Peyton ASL KBS IU 10/*HZ 1999,105,14:20:00 2000,109,17:27:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4101 Channel is not being recorded. The Z channel of the STS2 at KBS is not available; for some reason it is not being written to the buffer, and not being written to tape. END PROBLEM RESOLUTION REPORT ASL2000:093 2000/06/12 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION A new QAP (Quanterra Analog Processor) was installed in the digitizer for the STS-2 at KBS, and this solved the problem. Z channel data are once more available from the STS-2. END **************************************************************************** DATA PROBLEM REPORT DMC1994:030 1994/03/14 IRIS DMC Rick Benson DMC NRIL II VH[EN] 1992,356,00:00:00 1992,356,00:00:00 Problem Description DATA GLITCHES These components have large data glitches. I am not certain if these are related to a Steim Compressor bug reported and replied to in HRV1993:033 DPR, but it APPEARS to be unrelated. Postscript file is in DMC1994:030.ps. END PROBLEM RESOLUTION REPORT DMC1994:030 1994/03/15 IDA Peter Davis Description of Problem Resolution Comment These data glitches appear on both horizontals since the station was first installed and persist up to the present. The exact cause is unknown but believed to be related to the mining operation going on at the site. That the signal shows up on the horizontals but not on the vertical suggests that the glitches are related to a pressure differential. END **************************************************************************** DATA PROBLEM REPORT ASL2000:094 2000/06/12 ASL DCC Valerie Peyton ASL KBS IU 10/*HZ 10/*HE 1999,279,18:33:00 2003,247,18:29:00 Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE C 4410 Channel data quality is poor. There is excessive noise on the nominal Z and E components of the STS-2 at KBS. It appears from the data that something is amiss with the U mass (perhaps it is loose). We have alerted the station operators to the problem, but since this is not our instrument, there is nothing further we can do except wait. END PROBLEM RESOLUTION REPORT ASL2000:094 2003/09/05 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION After extensive trials and many an error, the KBS STS2 has been replaced and appears to be working once again. Long period noise on the E component is currently rendering the E data almost useless. For the full extent of the problem on the E component, please see ASL2003:178. Aside from that, data quality returns to normal at 2003, 247, 18:29. END **************************************************************************** DATA PROBLEM REPORT DMC1994:031 1994/03/14 IRIS DMC Rick Benson DMC VSL MN BHN 1990,238,00:00:00 1990,238,00:00:00 Problem Description HIGH FREQUENCY NOISE This component has very large amplitude, high frequency noise on this day. Postscript file is in DMC1994:031.ps. END **************************************************************************** DATA PROBLEM REPORT HRV1994:046 1994/07/06 Harvard WQC Misha Salganik ASL CHTO IU LHE 1994,047,22:03:00 1994,047,22:47:00 Problem Description OTHER The level of the signal is very small. See postscript file in /pub/qc/qc_ps. END PROBLEM RESOLUTION REPORT HRV1994:046 1994/08/17 ASL Tyler Storm Description of Problem Resolution COMMENT The example of CHTO (LHE) looks like a dead channel to me. However, the data tape that arrived at ASL did not begin until 94,047,23:47 so I am unable to check it out any further. Data after this time frame looks good. SUPPLEMENT Roughly 2.5 days of CHTO data are missing from 1994,045,12:30 to 1994,047,23:50. END **************************************************************************** DATA PROBLEM REPORT ASL2000:095 2000/06/12 ASL DCC Valerie Peyton ASL ANMO IU BHW LHW HHW 1996,035,11:35:00 1996,040,17:33:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The V component of the CMG3-T-B at ANMO is against the stop. END PROBLEM RESOLUTION REPORT ASL2000:095 2000/06/12 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The CMG3-T-B at ANMO was centered on 1996,040,17:33. END **************************************************************************** DATA PROBLEM REPORT DMC1994:032 1994/03/14 IRIS DMC Rick Benson DMC TOL DW BH* SH* LH* MH* 1981,316,00:00:00 1991,185,00:00:00 Problem Description HIGH FREQUENCY NOISE SEED COMMENT REFERENCE C 4506 Channel has high levels of cultural noise for all frequencies. This component has very large amplitude, high frequency noise on this day. Postscript file is in DMC94:032.ps. END PROBLEM RESOLUTION REPORT DMC1994:032 1994/04/08 ASL Tyler Storm Description of Problem Resolution Resolution The nasty looking horizontals were caused by cultural noise (the station was very close to a big city). For this reason, the equipment at TOL was moved to San Pablo, Spain (PAB) day 294 of 92. PAB data is much more quiet. SUPPLEMENT TOL also had excessive high frequency noise on the vertical component, and long period noise on all channels. All of this noise is cultural. END **************************************************************************** DATA PROBLEM REPORT HRV1994:043 1994/06/21 Harvard WQC Goran Ekstrom ASL KIV II VH? BH? 1994,000,34:09:05 1994,000,34:09:05 Problem Description OTHER Sampling interval in blockette 52 is inconsistent with data records. VH?: Sampling interval should be 1/10 but is 1/60 in data record. BH?: Sampling interval should be 20 but is 2 in data record. END PROBLEM RESOLUTION REPORT HRV1994:043 1994/06/27 IDA Peter Davis Description of Problem Resolution RESOLUTION The problem originated with an incorrect entry in the response database file maintained at the IDA DCC. From this file are generated the SEED header blockettes for all SEED volumes. The error was introduced on February 23, 1994 following a recent (1994-032) upgrade of KIV and involved all data channels for that epoch. As a result, the B052 blockettes, the B057 blockettes for three of five stages, tne the 48 byte fixed section of the data header, which is derived from information in B052, were all written incorrectly. Information in the B100 (sample rate) blockettes should contain the correct sampling rate for the interval covered by each volume. A revised dataless SEED volume was sent to the DMC on 06/24/94. All KIV data covering 1994032 - present will be resent shortly to the DMC for integration into their Mass Store. We are sorry for any inconvenience this may have caused. END **************************************************************************** DATA PROBLEM REPORT ASL2000:096 2000/06/14 ASL DCC Valerie Peyton ASL BAR TS *HZ 1995,129,18:55:00 1995,142,23:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The Z component of the STS-1 at BAR is recording digitizer noise. END PROBLEM RESOLUTION REPORT ASL2000:096 2000/06/14 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION At 1995,142,23:00 the Z component of the STS-1 at BAR began recording data once more. END **************************************************************************** DATA PROBLEM REPORT DMC1994:033 1994/03/15 IRIS DMC Rick Benson DMC ENH CD BH? 1993,080,00:00:00 1993,080,00:00:00 Problem Description DEAD CHANNEL These components are dead with strange symptom of large spikes. Postscript file will be useful for this one. Postscript file is in DMC94:033.ps. END PROBLEM RESOLUTION REPORT DMC1994:033 1994/04/22 ASL Tyler Storm Description of Problem Resolution COMMENT The problem on ENH around 93,080 appears to be some sort of equipment failure (probably digitizer). I don't have any documentation on what actually took place, but the data after 93,081 looks good. SUPPLEMENT The equipment problem at ENH recurred off and on with varying severity until the station was upgraded to an IRIS station. For the full duration of the problem, please see ASL1995:025. END **************************************************************************** DATA PROBLEM REPORT HRV1994:044 1994/06/21 Harvard WQC Goran Ekstrom DMC KIV II VH? 1994,160,00:00:00 1994,160,00:00:00 Problem Description OTHER In dataless seed volume ida.seed.940609 KIV VH? channels have wrong sampling rate: 1/100 instead of 1/10. END PROBLEM RESOLUTION REPORT HRV1994:044 1994/06/27 IDA Peter Davis Description of Problem Resolution RESOLUTION See HRV1994:043. END **************************************************************************** DATA PROBLEM REPORT ASL2000:097 2000/06/15 ASL DCC Valerie Peyton ASL BDFB GT *HE 1998,281,07:00:00 1999,026,21:00:00 Problem Description SPIKES SEED COMMENT REFERENCE C 4810 Channel has transient long period signals. The E component at BDFB has a recurring pulse every 1 to 2 hours. END PROBLEM RESOLUTION REPORT ASL2000:097 2000/06/15 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION This problem does not end so much as change character after a data gap of roughly 53 days. For the continuation of the problem, please see ASL1999:052. END **************************************************************************** DATA PROBLEM REPORT DMC1994:034 1994/03/15 IRIS DMC Rick Benson DMC KIV II BLE 1993,190,00:00:00 1993,190,00:00:00 Problem Description DEAD CHANNEL This component appears to be sick/aseismic. Postscript file is ~ftp/pub/qc/qc_ps/DMC1994:034.ps. END PROBLEM RESOLUTION REPORT DMC1994:034 1994/03/15 IDA Peter Davis Description of Problem Resolution Comment Yes, the component is sick. Inspection of a longer time series surrounding the window shown reveals clearly that the instrument has been overdriven a short time before. Routine processing set the clip flag on the high-gain channels, and the recordings on the low-gain channels look very suspicious as well. The behavior of the sensors returns to normal shortly thereafter. The recording of a large event on 1993193 is consistent on all gains. END **************************************************************************** DATA PROBLEM REPORT HRV1994:041 1994/06/18 Harvard WQC Misha Salganik ASL VNDA GT LH? BH? 1994,000,00:00:00 1904,019,32:00:00 Problem Description LOW FREQUENCY NOISE See postscript file in /pub/qc/qc_ps. END PROBLEM RESOLUTION REPORT HRV1994:041 1994/06/20 DMC Rick Benson Description of Problem Resolution Resolution The vertical components of VNDA show a calibration pulse. This is not a technical problem. END **************************************************************************** DATA PROBLEM REPORT ASL2000:098 2000/06/16 ASL DCC Valerie Peyton ASL KONO IU 00/*HN 2000,165,16:05:00 2000,189,17:26:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The N component of the STS-1 (00) at KONO is producing digitizer noise. END PROBLEM RESOLUTION REPORT ASL2000:098 2000/07/07 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The cable to the N component of the STS-1 (00 instrument) at KONO was replaced and proper data acquisition resumed on 2000,189,17:26. The N component data now look normal. END **************************************************************************** DATA PROBLEM REPORT DMC1994:035 1994/03/16 IRIS DMC Rick Benson DMC WFM G MH? 1990,171,00:00:00 1993,171,00:00:00 Problem Description DATA GLITCHES These components have large amplitude data glitches. Postscript file is ~ftp/pub/qc/qc_ps/DMC1994:035.ps. END **************************************************************************** DATA PROBLEM REPORT ASL2000:099 2000/06/20 ASL DCC Valerie Peyton ASL DAV IU 00/*HN 2000,038,01:40:00 2000,073,00:27:00 Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE C 4400 Channel data quality is very poor. The north component of the STS-1 at DAV is oscillating in a manner in which it shouldn't. One might describe it as a callibration that has gone horribly wrong. Large events are somewhat visible above these oscillations. END PROBLEM RESOLUTION REPORT ASL2000:099 2000/06/20 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The north component of the STS-1 at DAV returned to normal operating behavior on 2000,073. END **************************************************************************** DATA PROBLEM REPORT DMC1994:036 1994/03/16 IRIS DMC Rick Benson DMC HYB G BHE 1990,171,00:00:00 1993,171,00:00:00 Problem Description DATA LOGGER PROBLEM This component looks like a very large WWVB signal, with large square waves. Sick. Postscript file is ~ftp/pub/qc/qc_ps/DMC1994:036.ps. END **************************************************************************** DATA PROBLEM REPORT DMC1994:037 1994/03/23 IRIS DMC Rick Benson DMC ISA TS UMZ 1993,150,00:00:00 1993,150,00:00:00 Problem Description DEAD CHANNEL This component looks dead. Symptoms include squaring off of digital counts overriding some longer period response. Postscript file is on dmc.iris.washington.edu, in ~ftp/pub/qc/qc_ps/DMC1994:037.ps. END PROBLEM RESOLUTION REPORT DMC1994:037 1994/04/08 ASL Tyler Storm Description of Problem Resolution Resolution The channel is not dead. The data is representing how the mass is moving, and it doesn't move very much. The data looks "squared off" because you are seeing each individual digital count. For more detail reference DMC1994:039. END **************************************************************************** DATA PROBLEM REPORT HRV1994:040 1994/06/18 Harvard WQC Misha Salganik ASL SJG IU BHE LHE 1994,000,00:00:00 1994,000,00:00:00 Problem Description HIGH FREQUENCY NOISE See postscript file in /pub/qc/qc_ps. END PROBLEM RESOLUTION REPORT HRV1994:040 1994/08/11 ASL Tyler Storm Description of Problem Resolution Resolution The bell jar containing the E/W instrument at SJG lost vacuum from around the second week of Oct 93 through 94,041 (ref. ASL1994:001). As a result, all E/W data was very noisy during this time frame. END **************************************************************************** DATA PROBLEM REPORT DMC1994:080 1994/10/09 IRIS DMC Rick Benson DMC PAS TS * 1994,280,16:02:00 1994,283,20:40:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 555 Time is 1 minute fast. In looking at the SPYDER data for two large events, Oct 7 and Oct 9, Station PAS is indeed early with an incorrect clock by about one minute. I have BH data for the Oct 9 event only, but suspect timing problems for all data streams. END PROBLEM RESOLUTION REPORT DMC1994:080 2007/01/25 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION TS/PAS timing appears to be correct again as of 1994, 283, 20:40. END **************************************************************************** DATA PROBLEM REPORT DMC1994:081 1994/11/01 IRIS DMC Rick Benson DMC LSZ IU * 1994,304,00:00:00 1994,304,00:00:00 Problem Description INCORRECT TIME In looking at the SPYDER data for one event, Oct 31 at 11:48UTC, Station LSZ is indeed early with an incorrect clock by about three minutes. Postscript file is DMC94:081.ps END PROBLEM RESOLUTION REPORT DMC1994:081 1994/11/02 ASL Tyler Storm Description of Problem Resolution Resolution The timing is good at LSZ. There appeared to be a timing problem because the location for LSZ was incorrectly stated in the station configuration file. When SPYDER would dial-in and get data, the wrong coordinates would get sent back in the SAC header. As a result, if people are using the SAC header info for some type of automated process (like marking P-wave arrivals on the SPYDER data) the timing appears to be bad because the location is incorrect. We have dialed-in to LSZ and corrected the location in the configuration file. The new information will take hold when the system is reset the next time the tape is changed. In a week, or so, I would expect the SPYDER data (SAC headers) to have the correct information for LSZ It should be noted that the incorrect information is not being attached to the data when we produce our volumes (that information is derived from a different data base at ASL). No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT DMC1994:082 1994/11/08 IRIS DMC Rick Benson DMC ASCN II ALL 1994,309,00:00:00 1994,309,00:00:00 Problem Description OTHER In looking at a SPYDER event on Nov 5 at 02:15, I noticed that there was an anomolously early arrival by about 111 seconds. Turns out that the station location is incorrectly described in the SAC header, which is also getting passed to the AH headers for other users. Station location in the spyder data is: latitude: 12.345600 longitude: 12.345600 elevation: 0.000000 END PROBLEM RESOLUTION REPORT DMC1994:082 1994/11/08 IDA Peter Davis Description of Problem Resolution Resolution The error was based on incorrect information in a data file used to compose the SAC files requested by SPYDER. The file was updated today. SPYDER requests submitted hereafter should have the correct station coordinates for ASCN. **************************************************************** DATA PROBLEM REPORT ASL1994:027 94/11/14 ASL DCC Tyler Storm ASL TBT IU ? 1994,096,00:00:00 1994,166,00:00:00 Problem Description OTHER The timing is questionable at TBT from 6 Apr 94 through 15 June 94 when a GPS receiver was installed. The clock was unlocked during the time in question. No Problem Resolution Report is needed. END **************************************************************************** DATA PROBLEM REPORT DMC1994:083 1994/12/15 IRIS DMC Rick Benson DMC MDJ CD BH? 1988,051,00:00:00 1988,053,00:00:00 Problem Description OTHER There is no effective Broad Band Response information for the station MDJ for data after 1988,051 to 1988,053. The DMC has data through day 053, but response information ends on day 051. END PROBLEM RESOLUTION REPORT DMC1994:083 1994/12/15 ASL Tyler Storm Description of Problem Resolution RESOLUTION The effective Broad Band Response information dates for MDJ channels have been moved out to 1988,054,00:00:00 in order to cover all of day 53. END **************************************************************************** DATA PROBLEM REPORT DMC1994:067 1994/06/09 IRIS DMC Rick Benson DMC TBT IU LH?,BH? 1994,160,00:00:00 1994,160,00:00:00 Problem Description INCORRECT TIME Station TBT has approx timing error of 30 seconds early during the large event of June 9, 00:33. END PROBLEM RESOLUTION REPORT DMC1994:067 1994/06/17 ASL Tyler Storm Description of Problem Resolution Resolution Timing was uncertain at TBT from 2 Jun 94 through 15 Jun 94. When the station came back on line (2 Jun) the GPS receiver was missing a modification that enables it to lock on the satellite. As a result, even though the station had a new GPS receiver, the timing was drifting until the modification was completed on 15 Jun 94. END **************************************************************************** DATA PROBLEM REPORT DMC1994:074 1994/07/24 IRIS DMC Rick Benson DMC BDF IU LHN 1992,214,00:00:00 1992,214,00:00:00 Problem Description DATA GLITCHES This component has high amplitude data glitches during at least this day, and occur approx every 300 secs. Postscript files is in ~ftp/pub/qc/qc_ps/DMC1994:074.ps END PROBLEM RESOLUTION REPORT DMC1994:074 1995/04/19 ASL Tyler Storm Description of Problem Resolution Comment I don't specifically know what was causing the problem at BDF. BDF was had quite a few problems before it was shut down on 93, 167. The equipment was just getting too old, and since the new GTSN station (BDFB) was about to be installed, nobody wanted to put the money into fixing the BDF. No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT DMC1994:075 1994/07/28 IRIS DMC Rick Benson DMC KIP IU VM? 1994,000,00:00:00 1994,000,00:00:00 Problem Description OTHER The mass position sensors have an incorrect sample rate represented in the header. They are represented as .01 instead of .1 . They are represented correctly in the data records. END PROBLEM RESOLUTION REPORT DMC1994:075 1994/08/09 ASL Tyler Storm Description of Problem Resolution Resolution The sample rates have been changed in the KIP, VM* headers to .1 sps. END **************************************************************************** DATA PROBLEM REPORT DMC1994:076 1994/08/09 IRIS DMC Rick Benson DMC MAT HG LHN 1975,179,02:39:00 1975,197,08:07:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. Channel LHN is dead. Postscript file in pub/qc/qc_ps/DMC94:076.ps END PROBLEM RESOLUTION REPORT DMC1994:076 1994/08/10 ASL Tyler Storm Description of Problem Resolution COMMENT Yes, the LHN channel was dead at MAT during this time frame. I can't find maintenance records that date back to 1975 to find the answer. No further action will be taken. SUPPLEMENT The MAT LHN channel returned to normal operation at 1975, 197, 08:07. END **************************************************************************** DATA PROBLEM REPORT DMC1994:078 1994/08/19 IRIS DMC Rick Benson DMC MAIO SR LH? 1976,310,00:00:00 1976,310,00:00:00 Problem Description OTHER These channels have slightly incorrect Normalization values written into the headers. When calculated from the poles and zeroes, one gets 97720.140625, where the headers say 97000.000000. #The difference is small, but is there a way to change your database? # Im now calculating all Ao values from poles and zeroes (actually # put it into rdseed) and comparing with what is given, and if it's # >.5% ,then give a warning. Im thinkng we'll see more of these. #What should I do with this information? # -rick END PROBLEM RESOLUTION REPORT DMC1994:078 1994/08/24 ASL Tyler Storm Description of Problem Resolution RESOLUTION I changed the normalization constant in the MAIO file from 97000 to 97720.2. This station must have been skipped over when we made a global (database) update to the old poles and zeros files. The update I speak of did not alter the actual poles and zeros numbers, only the normalization factor which is calculated from these values. END **************************************************************************** DATA PROBLEM REPORT DMC1994:071 1994/07/20 IRIS DMC Rick Benson DMC LON DW LH? 1980,275,00:00:00 1994,100,15:30:00 Problem Description DATA GLITCHES SEED COMMENT REFERENCE C 1841 Sensor is calibrated daily These components have a double-pulse data glitch during the 16:00 hour each day during at least this time period. I'm pretty sure that it's a calibration pulse, but want to document for users who might be looking at data during this time window. Two postscript files show full day and narrow time window perspectives. Postscript files are ~ftp/pub/qc/qc_ps/DMC94:071.ps AND ~ftp/pub/qc/qc_ps/DMC94:071.A.ps. END PROBLEM RESOLUTION REPORT DMC1994:071 1994/07/21 ASL Tyler Storm Description of Problem Resolution Resolution These signals at LON are "step" or "pulse" calibrations. The sharp upward motion is caused by the cal signal being turned on, then the signal drifts back to the normal position as the instrument recovers. The sharp downward pulse is caused by the cal signal being turned off, and then the signal drifts back to the center (again) as the instrument recovers. END **************************************************************************** DATA PROBLEM REPORT DMC1994:072 1994/07/21 IRIS DMC Rick Benson DMC SNZO SR LHZ LHN LHE SLZ 1978,142,20:20:00 1978,288,19:50:00 Problem Description DATA GLITCHES SEED COMMENT REFERENCE C 4525 Channel has spiking and other data glitches. This component has high amplitude data glitches during at least this day. Postscript files are ~ftp/pub/qc/qc_ps/DMC94:072.ps AND ~ftp/pub/qc/qc_ps/DMC94:072.A.ps. END PROBLEM RESOLUTION REPORT DMC1994:072 1994/08/09 ASL Tyler Storm Description of Problem Resolution Comment We don't know what caused the high amplitude data glitches during this time frame at SNZO. No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT ASL2004:116 2004/11/16 ASL DCC Valerie Peyton ASL POHA IU */* 2004,320,21:27:00 2004,323,01:35:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. An ASL field team is on-site at POHA performing station maintenance. Expect variable data availability and quality, tests, and calibrations. END PROBLEM RESOLUTION REPORT ASL2004:116 2004/11/19 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The ASL field team left POHA at 2004, 323, 01:35. Data quality returns to normal at this time, with the exception of the data from the 54000. During the maintenance visit, the POHA 54000 failed in a manner not repairable on site. For the full time span of this problem, please see ASL2004:121. END **************************************************************************** DATA PROBLEM REPORT ASL2004:117 2004/11/17 ASL DCC Valerie Peyton ASL GNI IU */* 2004,321,08:55:00 2004,322,09:44:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. There is a CTBTO team at GNI performing station maintenance. Expect variable data quality and availability. END PROBLEM RESOLUTION REPORT ASL2004:117 2005/01/17 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The GNI station maintenance was finished at 2004, 322, 09:44. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2004:118 2004/11/17 ASL DCC Valerie Peyton ASL CCM IU */* 2004,316,20:06:00 2004,321,15:47:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 451 Timing MAY be in error, as clock is unlocked. The GPS system at CCM is not operating properly at this time. Timing in the data should be considered suspect. END PROBLEM RESOLUTION REPORT ASL2004:118 2004/11/17 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The GPS system at CCM was fixed at 2004, 321, 15:47. Timing quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2004:119 2004/11/19 ASL DCC Valerie Peyton ASL HKT IU 00/*HE 2004,324,11:34:00 2004,341,20:20:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The E component of the STS1 at HKT is moving rapidly towards a stop. Hopefully it can be recentered before data are no longer useable. By 2004, 332, 07:22 the mass is completely pegged and data are no longer useable. END PROBLEM RESOLUTION REPORT ASL2004:119 2004/12/07 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The STS1 E at HKT was recentered at 2004, 341, 20:20. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2004:110 2004/11/04 ASL DCC Valerie Peyton ASL BILL IU 00/*HN 2004,259,20:48:00 2004,265,00:49:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The mass of the N component of the STS1 at BILL has fallen against one of its stops. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2004:110 2004/11/04 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The BILL station operator recentered the STS1 N. Data quality returns to normal at 2004, 265, 00:49. END **************************************************************************** DATA PROBLEM REPORT ASL2004:111 2004/11/04 ASL DCC Valerie Peyton ASL TIXI IU 00/*HN 2004,308,05:31:00 2004,311,02:15:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The mass of the STS1 N component at TIXI has fallen against one of its stops. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2004:111 2004/11/08 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The TIXI station operator recentered the STS1 N. Data quality returns to normal at 2004, 311, 02:15. END **************************************************************************** DATA PROBLEM REPORT ASL2004:112 2004/11/08 ASL DCC Valerie Peyton ASL GUMO IU */* 2004,313,01:46:00 2004,317,23:32:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. An ASL field team is on location at GUMO performing station maintenance. Expect variable data quality and availability, as well as tests, calibrations, and other disturbances. END PROBLEM RESOLUTION REPORT ASL2004:112 2004/11/23 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The ASL field team left GUMO in excellent operational condition at 2004, 317 23:32. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2004:113 2004/11/08 ASL DCC Valerie Peyton ASL QSPA IU 20/*H* 2004,312,00:55:00 2004,313,16:41:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. All three components of the QSPA STS2 are pegged during this time period. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2004:113 2004/11/08 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION We were able to remotely recenter the QSPA STS2. Data quality returns to normal at 2004, 313, 16:41. END **************************************************************************** DATA PROBLEM REPORT ASL2004:114 2004/11/15 ASL DCC Valerie Peyton ASL SDV IU 10/*HN 2004,320,09:11:00 2004,320,19:46:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. A local event caused the N component of the CMG3T at SDV to fall against one of its stops. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2004:114 2004/11/15 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION We were able to remotely recenter the CMG3T at SDV. Data quality returns to normal at 2004, 320, 19:46. END **************************************************************************** DATA PROBLEM REPORT ASL2004:115 2004/11/15 ASL DCC Valerie Peyton ASL BILL IU 00/*HN 2004,319,19:16:00 2004,321,22:11:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The N component of the STS1 at BILL has fallen against one of its stops. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2004:115 2004/11/17 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The BILL station operator recentered the N component of the STS1 at 2004, 321, 22:11. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2004:105 2004/10/26 ASL DCC Valerie Peyton ASL YSS IU 20/*NN 2004,138,07:32:00 2004,174,07:19:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The N component of the FBA23 at YSS was down during this time. For some reason, it appears to have recorded geniune seismic background noise, instead of the digitizer noise that should be found on an accelerometer between events. END PROBLEM RESOLUTION REPORT ASL2004:105 2004/10/26 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION A full station reset at YSS corrected the recording problem on the FBA23 N component. Data quality returns to normal at 2004, 174, 07:19. END **************************************************************************** DATA PROBLEM REPORT ASL2004:106 2004/10/27 ASL DCC Valerie Peyton ASL SDV IU */* 2004,299,17:12:00 2004,317,22:26:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 451 Timing MAY be in error, as clock is unlocked. The GPS system at SDV has lost contact with the GPS satellites and timing is therefore suspect. Until the system is reset, the internal oscillator will be running off of the last known good GPS signal and timing in the data will not be too far off. Once the system is reset timing in the data will come from the internal OS9 clock, and timing errors will rapidly increase. We hope to keep the system from being reset until the GPS system can be replaced. END PROBLEM RESOLUTION REPORT ASL2004:106 2004/11/16 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION We were able to remotely reset the GPS system at SDV, and timing quality returns to normal at 2004, 317, 22:26. END **************************************************************************** DATA PROBLEM REPORT ASL2004:107 2004/11/01 ASL DCC Valerie Peyton ASL SBA IU 00/*H* 2004,302,20:58:00 2004,303,02:53:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. All three channels of the CMG at SBA were down during this time frame. The station operator locked the masses to prevent damage to the instrument while construction work was going on nearby. END PROBLEM RESOLUTION REPORT ASL2004:107 2004/11/01 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The SBA CMG recovered nicely after being locked during the construction work. Data quality returns to normal at 2004, 303, 02:53. END **************************************************************************** DATA PROBLEM REPORT ASL2004:108 2004/11/02 ASL DCC Valerie Peyton ASL RSSD IU 00/*H* 2004,305,19:42:00 2005,085,03:08:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The 54000 at RSSD is currently producing raw digitizer noise. This problem began after the station was revived following a storm. The storm induced a power surge that took out a breaker on the power system at the station. It is possible that the instrument itself was affected by the power surge. END PROBLEM RESOLUTION REPORT ASL2004:108 2005/03/28 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The 54000 at RSSD was replaced during a maintenance trip. Data quality returns to normal at 2005, 085, 03:08. END **************************************************************************** DATA PROBLEM REPORT ASL2004:109 2004/11/02 ASL DCC Valerie Peyton ASL BILL IU 00/*HE 2004,306,15:35:00 2004,308,22:04:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The mass of the E component of the STS1 at BILL has fallen against one of its stops. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2004:109 2004/11/04 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The BILL station operator recentered the STS1 E. Data quality returns to normal at 2004, 308, 22:04. END **************************************************************************** DATA PROBLEM REPORT ASL2004:100 2004/10/13 ASL DCC Valerie Peyton ASL AFI IU 10/*HN 10/*HE 2004,272,00:00:00 2004,287,03:14:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4625 Invalid instrument response. Both horizontal components of the STS2 at AFI have lost half of their double-ended output. The response for these channels is 10-30dB lower than it should be. END PROBLEM RESOLUTION REPORT ASL2004:100 2004/10/13 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The AFI STS2 cable and hot box were replaced. This corrected the instrument response. Data quality returns to normal at 2004, 287, 03:14. END **************************************************************************** DATA PROBLEM REPORT ASL2004:101 2004/10/18 ASL DCC Valerie Peyton ASL TIXI IU 00/*HZ 2004,271,02:17:00 2004,290,01:03:00 Problem Description NOISE SEED COMMENT REFERENCE C 4507 Channel has excessively high noise levels. The Z component of the STS2 at TIXI appears to have lost vacuum containment. Noise levels are exceedingly high at all frequencies, but the low frequencies are most affected. END PROBLEM RESOLUTION REPORT ASL2004:101 2004/10/18 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The TIXI station operator evacuated and recentered the STS1 Z. Data quality returns to normal at 2004, 290, 01:03. END **************************************************************************** DATA PROBLEM REPORT ASL2004:102 2004/10/18 ASL DCC Valerie Peyton ASL TIXI IU 00/*HE 2004,275,13:10:00 2004,275,13:10:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4620 Incorrect instrument response for low frequencies only During a routine maintenance visit to relevel the TIXI sensors, the station operator accidentally left the STS1 E component in 20 second period mode. The response for this instrument is therefore incorrect from 0.1Hz all through the lower frequencies. END PROBLEM RESOLUTION REPORT ASL2004:102 2004/10/22 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The TIXI station operator reset the jumpers in the STS1 E feedback electronics box. The instrument is once more recording in 360 second mode as it should. Data quality returns to normal at 2004, 294, 20:47. END **************************************************************************** DATA PROBLEM REPORT ASL2004:103 2004/10/21 ASL DCC Valerie Peyton ASL HNR IU */* 2004,275,00:00:00 2004,295,01:06:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. An ASL field team is on site at HNR for station repairs, maintenance, and upgrade. Expect variable data quality and availability, as well as tests, calibrations, and other anomalies. END PROBLEM RESOLUTION REPORT ASL2004:103 2004/10/21 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The ASL field team left HNR in excellent operating condition. Data quality returns to normal at 2004, 295, 01:06. END **************************************************************************** DATA PROBLEM REPORT ASL2004:104 2004/10/21 ASL DCC Valerie Peyton ASL AFI IU */* 2004,268,00:00:00 2004,273,17:10:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. An ASL field team is on site at AFI for station repairs, maintenance, and upgrade. Expect variable data quality and availability, as well as tests, calibrations, and other anomalies. END PROBLEM RESOLUTION REPORT ASL2004:104 2004/10/21 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The ASL field team left AFI in excellent operating condition. Data quality returns to normal at 2004, 273, 17:10. END **************************************************************************** DATA PROBLEM REPORT ASL2004:138 2004/12/20 ASL DCC Valerie Peyton ASL LSA IC 10/*HN 10/*HE 2004,355,04:32:00 2004,356,02:44:00 Problem Description 0 SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The LSA STS2 masses are pegged. The Z component data is currently still quite good, but the N and E component data are not useable. END PROBLEM RESOLUTION REPORT ASL2004:138 2004/12/21 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The LSA station operator recentered the STS2. Data quality returns to normal at 2004, 356, 02:44. END **************************************************************************** DATA PROBLEM REPORT ASL2004:139 2004/12/27 ASL DCC Tyler Storm ASL GUMO IU 10/?HE 2004,361,01:26:00 2004,362,15:01:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. All E/W channels from the GUMO CMG3-T are dead. END PROBLEM RESOLUTION REPORT ASL2004:139 2004/12/27 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION Problem fixed with an instrument recenter. GUMO CMG3-T E/W data quality returns to normal at 2004, 362, 15:01. END **************************************************************************** DATA PROBLEM REPORT ANSS2005:070 2005/10/17 ANSS DCC Mark Meremonte ANSS JCT US ALL 2004,351,21:52:00 2005,215,00:00:00 Problem Description DATA LOGGER PROBLEM SEED COMMENT REFERENCE S 2515 Data dropouts VSAT Communications: Q330 sites only Problem: UDP packets are dropped intermittently during transit where frequency of occurrence varies for each site and varies greatly from site to site. Resolution: Created a TCP/IP "tunnel" for the UDP packets to transmit through similar to a VPN without the encryption. END **************************************************************************** DATA PROBLEM REPORT ASL2004:130 2004/12/02 ASL DCC Valerie Peyton ASL QSPA IU 20/*H* 2004,337,01:44:00 2004,344,15:34:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The masses of the STS2 at QSPA have fallen against their stops. Some large earthquakes may be visible, but otherwise the data are not useable. END PROBLEM RESOLUTION REPORT ASL2004:130 2004/12/09 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The QSPA STS2 was remotely recentered. Data quality returns to normal at 2004, 344, 15:34. END **************************************************************************** DATA PROBLEM REPORT ASL2004:131 2004/12/02 ASL DCC Valerie Peyton ASL HKT IU 00/*HN 2004,336,20:57:00 2004,341,20:20:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The mass of the STS1 N at HKT has fallen against its stop. Some large earthquakes may be visible, but otherwise the data are not useable. END PROBLEM RESOLUTION REPORT ASL2004:131 2004/12/07 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The STS1 N at HKT was recentered at 2004, 341, 20:20. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2004:132 2004/12/06 ASL DCC Valerie Peyton ASL ANMO IU 10/LDO 2004,328,17:31:00 2004,335,22:40:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The ANMO Vaisala microbarograph was not working during this time. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2004:132 2004/12/06 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The ANMO Vaisala microbarograph was fixed at 2004, 335, 22:40. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2004:133 2004/12/09 ASL DCC Valerie Peyton ASL TRIS IU 20/*N* 2004,265,17:04:00 2004,265,17:04:00 Problem Description SPIKES SEED COMMENT REFERENCE C 4510 Channel has frequent spiking. All three channels of the FBA23 at TRIS are recording frequent large spikes. Sometimes there are events visible between the spikes. The frequency of the spikes varies from 2 seconds to 2 hours. END **************************************************************************** DATA PROBLEM REPORT ASL2004:134 2004/12/17 ASL DCC Tyler Storm ASL OTAV IU 00/?HZ, 00/?HN 2004,183,16:21:00 2004,350,18:00:00 Problem Description OTHER SEED COMMENT REFERENCE C 4330 Vertical and north-south inputs swapped (ie, Z <=> N). During this time frame the inputs from the vertical and N/S STS-1 instruments were swapped for trouble shooting purposes. As a result, the vertical data are on the N/S channels and the N/S data are on the vertical channels. END PROBLEM RESOLUTION REPORT ASL2004:134 2004/12/20 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The OTAV station operator returned the STS1 Z and N inputs to their proper configuration. Data channels are once more collecting data as labeled. END **************************************************************************** DATA PROBLEM REPORT ASL2004:135 2004/12/20 ASL DCC Tyler Storm ASL CPUP GT 00/* 2004,337,12:13:00 2005,108,00:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. All channels from the KS54000 are dead. END PROBLEM RESOLUTION REPORT ASL2004:135 2006/01/30 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The CPUP 54000 was repaired. Because of a data outage, we do not know the precise time of repair. But data quality is normal as of 2005, 108, 00:00. END **************************************************************************** DATA PROBLEM REPORT ASL2004:136 2004/12/20 ASL DCC Valerie Peyton ASL BILL IU 00/*HZ 2004,352,15:33:00 2004,355,22:15:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The Z component of the STS1 at BILL has fallen against one of its stops. Data can be used with caution until 2004, 353, 10:06. After this time, data are not useable at all. END PROBLEM RESOLUTION REPORT ASL2004:136 2004/12/21 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The BILL station operator recentered the STS1 Z. Data quality returns to normal at 2004, 355, 22:15. END **************************************************************************** DATA PROBLEM REPORT ASL2004:137 2004/12/20 ASL DCC Valerie Peyton ASL TIXI IU 00/*HN 2004,352,13:38:00 2005,016,03:11:00 Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE C 4410 Channel data quality is poor. The TIXI STS1 N/S data become very noisy at 14:5 UTC on 17 Dec 2004. END PROBLEM RESOLUTION REPORT ASL2004:137 2005/01/17 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The TIXI station operator recentered the N/S STS1, fixing the noise problem. Data quality returns to normal at 2005, 016, 03:11. END **************************************************************************** DATA PROBLEM REPORT ANSS2005:069 2005/09/29 ANSS DCC Mark Meremonte ANSS HAWA US ALL 2005,076,21:00:00 2005,215,00:00:00 Problem Description DATA LOGGER PROBLEM SEED COMMENT REFERENCE S 2515 Data dropouts VSAT Communications: Q330 sites only Problem: UDP packets are dropped intermittently during transit where frequency of occurrence varies for each site and varies greatly from site to site. Resolution: Created a TCP/IP "tunnel" for the UDP packets to transmit through similar to a VPN without the encryption. END **************************************************************************** DATA PROBLEM REPORT ANSS2005:068 2005/09/29 ANSS DCC Mark Meremonte ANSS HAWA US ALL 2005,001,00:00:00 2006,001,00:00:00 Problem Description OTHER Calendar year of 2005: Station susceptible to short and long periods of down times; Cause(s): Weather conditions; Rain/Snow/Ice on dish; Power outage; VSAT communication difficulties; Other out of our control conditions Extended down times of 1 day or more enumerated here: DDD+HH:MM to DDD+HH:MM UTC --------- --------- 001+00:00 -- 076+21:34 093+07:32 -- 097+03:21 108+13:52 -- 110+16:46 END **************************************************************************** DATA PROBLEM REPORT ANSS2005:065 2005/09/27 ANSS DCC Mark Meremonte ANSS DUG US ALL 2005,072,19:00:00 2005,215,00:00:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE S 2515 Data dropouts VSAT Communications: Q330 sites only Problem: UDP packets are dropped intermittently during transit where frequency of occurrence varies for each site and varies greatly from site to site. Resolution: Created a TCP/IP "tunnel" for the UDP packets to transmit through similar to a VPN without the encryption. END PROBLEM RESOLUTION REPORT ANSS2005:065 2006/07/31 ANSS DCC leo Description of Problem Resolution RESOLUTION Data from 2005, 041 to 2005, 241 had excessive drop as identified in DPR ANSS2005:06 by Meremonte. the drops resolved after day 2006, 241 Reason Unknown. Telemetry Problem? END **************************************************************************** DATA PROBLEM REPORT ANSS2005:064 2005/09/23 ANSS DCC Mark Meremonte ANSS CBKS US ALL 2005,001,00:00:00 2006,001,00:00:00 Problem Description OTHER Calendar year of 2005: Station susceptible to short and long periods of down times; Cause(s): Weather conditions; Rain/Snow/Ice on dish; Power outage; VSAT communication difficulties; Other out of our control conditions Extended down times of 1 day or more enumerated here: DDD+HH:MM to DDD+HH:MM UTC --------- --------- END **************************************************************************** DATA PROBLEM REPORT ANSS2005:067 2005/09/29 ANSS DCC Mark Meremonte ANSS HAWA US ALL 2004,001,00:00:00 2005,001,00:00:00 Problem Description OTHER Calendar year of 2004: Station susceptible to short and long periods of down times; Cause(s): Weather conditions; Rain/Snow/Ice on dish; Power outage; VSAT communication difficulties; Other out of our control conditions Extended down times of 1 day or more enumerated here: DDD+HH:MM to DDD+HH:MM UTC --------- --------- 356+23:00 -- 366+24:00 END **************************************************************************** DATA PROBLEM REPORT ANSS2005:066 2005/09/28 ANSS DCC Mark Meremonte ANSS GOGA US ALL 2004,348,00:00:00 2005,215,00:00:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE S 2515 Data dropouts VSAT Communications: Q330 sites only Problem: UDP packets are dropped intermittently during transit where frequency of occurrence varies for each site and varies greatly from site to site. Resolution: Created a TCP/IP "tunnel" for the UDP packets to transmit through similar to a VPN without the encryption. END **************************************************************************** DATA PROBLEM REPORT ANSS2005:061 2005/09/21 ANSS DCC Mark Meremonte ANSS ACSO US ALL 2005,001,00:00:00 2006,001,00:00:00 Problem Description OTHER Calendar year of 2005: Station susceptible to short and long periods of down times; Cause(s): Weather conditions; Rain/Snow/Ice on dish; Power outage; VSAT communication difficulties; Other out of our control conditions Extended down times of 1 day or more enumerated here: DDD+HH:MM to DDD+HH:MM UTC --------- --------- END **************************************************************************** DATA PROBLEM REPORT ANSS2005:060 2005/09/21 ANSS DCC Mark Meremonte ANSS AAM US ALL 2005,001,00:00:00 2006,001,00:00:00 Problem Description OTHER Calendar year of 2005: Station susceptible to short and long periods of down times; Cause(s): Weather conditions; Rain/Snow/Ice on dish; Power outage; VSAT communication difficulties; Other out of our control conditions Extended down times of 1 day or more enumerated here: DDD+HH:MM to DDD+HH:MM UTC --------- --------- 023+23:57 -- 025+19:54 102+19:25 -- 153+18:27 END **************************************************************************** DATA PROBLEM REPORT ANSS2005:063 2005/09/23 ANSS DCC Mark Meremonte ANSS BW06 US ALL 2005,001,00:00:00 2006,001,00:00:00 Problem Description OTHER Calendar year of 2005: Station susceptible to short and long periods of down times; Cause(s): Weather conditions; Rain/Snow/Ice on dish; Power outage; VSAT communication difficulties; Other out of our control conditions Extended down times of 1 day or more enumerated here: DDD+HH:MM to DDD+HH:MM UTC --------- --------- END **************************************************************************** DATA PROBLEM REPORT ANSS2005:062 2005/09/21 ANSS DCC Mark Meremonte ANSS AMTX US ALL 2005,001,00:00:00 2006,001,00:00:00 Problem Description OTHER Calendar year of 2005: Station susceptible to short and long periods of down times; Cause(s): Weather conditions; Rain/Snow/Ice on dish; Power outage; VSAT communication difficulties; Other out of our control conditions Extended down times of 1 day or more enumerated here: DDD+HH:MM to DDD+HH:MM UTC --------- --------- END **************************************************************************** DATA PROBLEM REPORT ASL2004:127 2004/11/29 ASL DCC Valerie Peyton ASL ANMO IU 00/*H* 2004,327,20:29:00 2004,328,06:27:00 Problem Description OTHER SEED COMMENT REFERENCE C 1840 Calibration data Calibrations were run on the ANMO 54000 during this time frame. Data are not useful for earthquake analysis, but are great for sensor calibration analysis. END PROBLEM RESOLUTION REPORT ASL2004:127 2004/11/29 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The ANMO 54000 calibrations ended at 2004, 328, 06:27. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2004:128 2004/12/01 ASL DCC Valerie Peyton ASL KIP IU */* 2004,324,18:26:00 2004,325,12:37:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. An ASL field team was on site at KIP for station maintenance during this time. Expect variable data quality and availability, as well as test, calibrations and other anomalies. END PROBLEM RESOLUTION REPORT ASL2004:128 2004/12/01 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The ASL field team left KIP in excellent condition at 2004, 325, 12:27. Data quality returns to normal at this time. Better than normal, in fact: The STS2 no longer has its spiking problem! END **************************************************************************** DATA PROBLEM REPORT ASL2004:129 2004/12/01 ASL DCC Valerie Peyton ASL TIXI IU 00/*HE 2004,326,03:47:00 2004,337,01:51:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4630 Response may be invalid. The STS1 E at TIXI appears to be spontaneously putting itself into 20 second mode, and then recover. The instrument response is corrupt at least from 0.1 Hz down on into all of the lower frequencies. END PROBLEM RESOLUTION REPORT ASL2004:129 2004/12/07 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The STS1 E component at TIXI has fixed itself and the response has stabilized. Data quality has returned to normal at of 2004, 337, 01:51. END **************************************************************************** DATA PROBLEM REPORT ASL2004:120 2004/11/19 ASL DCC Valerie Peyton ASL POHA IU 00/*H* 2004,320,21:35:00 2005,148,04:13:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. All three components of the 54000 at POHA are down. The instrument will need to be replaced. END PROBLEM RESOLUTION REPORT ASL2004:120 2005/06/10 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The POHA 54000 was replaced and data quality returns to normal at 2005, 148, 04:13. END **************************************************************************** DATA PROBLEM REPORT ASL2004:121 2004/11/22 ASL DCC Valerie Peyton ASL OTAV IU 10/*HE 10/*HN 2004,324,15:16:00 2004,324,15:16:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. Both of the horizontal components of the CMG3T at OTAV have fallen against their stops. We believe the start time is 2004, 324, 15:16, but it may have been earlier. There is a significant gap in the live data. Before the gap, the data are fine; after the gap, the masses are pegged. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2004:121 2004/11/23 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION We were able to remotely recenter the OTAV CMG3T. Data quality returns to normal at 2004, 327, 22:00. END **************************************************************************** DATA PROBLEM REPORT ASL2004:122 2004/11/22 ASL DCC Tyler Storm ASL TIXI IU 00/?HN 2004,326,14:50:00 2004,343,09:39:00 Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE C 4410 Channel data quality is poor. The N/S data become very noisy at 14:5 UTC on 21 Nov. END PROBLEM RESOLUTION REPORT ASL2004:122 2004/12/08 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The TIXI station operator recentered the STS1. Data quality returns to normal at 2004, 343, 09:39. END **************************************************************************** DATA PROBLEM REPORT ASL2004:123 2004/11/23 ASL DCC Valerie Peyton ASL GUMO IU 20/*NE 2004,317,22:58:00 2004,325,05:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The E component of the FBA23 at GUMO is down. A replacement FBA23 has been shipped. END PROBLEM RESOLUTION REPORT ASL2004:123 2004/11/23 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The GUMO station operator installed the replacement FBA23. This fixed the problem on the E component. Data quality returns to normal at 2004, 325, 05:00. END **************************************************************************** DATA PROBLEM REPORT ASL2004:124 2004/11/26 ASL DCC Valerie Peyton ASL HNR IU *HZ 00/*HZ 1997,014,03:06:00 1999,180,02:54:00 Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE C 4504 Channel exibits high levels of low frequency noise. The Z component of the 54000 at HNR is exhibiting extraordinarily high levels of low frequency noise. From 30 seconds (0.033 Hz) and down, noise levels are 2 to 40dB too high. The problem worsens with time. END PROBLEM RESOLUTION REPORT ASL2004:124 2004/11/26 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The Z component of the 54000 at HNR failed completely at 1999, 180, 02:54. This solved the noise problem but introduced a new problem of a dead channel. For the full extent of the dead channel problem, please see ASL1999:055. END **************************************************************************** DATA PROBLEM REPORT ASL2004:125 2004/11/26 ASL DCC Valerie Peyton ASL HNR IU */* 2004,302,05:45:00 2004,307,09:11:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. An ASL field team is on site at HNR for station repairs, maintenance, and upgrade. Expect variable data quality and availability, as well as tests, calibrations, and other anomalies. END PROBLEM RESOLUTION REPORT ASL2004:125 2004/11/26 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The ASL field team left HNR in excellent operating condition. Data quality returns to normal at 2004, 307, 09:11. END **************************************************************************** DATA PROBLEM REPORT ASL2004:126 2004/11/29 ASL DCC Valerie Peyton ASL SBA IU 00/*H* 2004,334,00:45:00 2004,334,01:27:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. All three components of the CMG3T at SBA are locked to preserve the instrument from damage during local construction work. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2004:126 2004/11/29 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The SBA CMG3T was unlocked and resumed normal operation at 2004, 334, 01:27. END **************************************************************************** DATA PROBLEM REPORT ANSS2005:075 2005/12/13 ANSS DCC ANSS DCC ANSS AAM US BHE 2005,100,00:00:00 2005,100,00:00:00 Problem Description POLARITY REVERSED ddd END **************************************************************************** DATA PROBLEM REPORT ANSS2005:072 2005/10/19 ANSS DCC Mark Meremonte ANSS LAO US ALL 2005,001,00:00:00 2006,001,00:00:00 Problem Description OTHER Calendar year of 2005: Station susceptible to short and long periods of down times; Cause(s): Weather conditions; Rain/Snow/Ice on dish; Power outage; VSAT communication difficulties; Other out of our control conditions Extended down times of 1 day or more enumerated here: DDD+HH:MM to DDD+HH:MM UTC --------- --------- 101+09:54 -- 103+20:45 END **************************************************************************** DATA PROBLEM REPORT ANSS2005:071 2005/10/18 ANSS DCC Mark Meremonte ANSS JFWS US BH*, LH* 2005,093,01:00:00 2005,162,16:22:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 2504 Little or no data available. At start time above the STS-2 signal was lost. At the end time above (resolution time) the STS-2 signal was regained. NOTE: During this period which the STS-2 was dead VSAT communication was also lost. VSAT communication was regained as well at this end time. See ANSS2005:042 for gap/data-dropout information times. END **************************************************************************** DATA PROBLEM REPORT ANSS2005:074 2005/11/10 ANSS DCC Mark Meremonte ANSS OXF US BHE, LHE 2004,275,00:00:00 2005,109,20:07:00 Problem Description OTHER SEED COMMENT REFERENCE C 2504 Little or no data available. Broadband instrument is a STS-2; BHE channel is being driven onto the stops but all channels are being affected. Problem resolved by STS-2 replacement: 2005*109+20:07 UTC. END **************************************************************************** DATA PROBLEM REPORT ANSS2005:073 2005/11/04 ANSS DCC Mark Meremonte ANSS MIAR US ALL 2004,344,19:00:00 2005,215,00:00:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE S 2515 Data dropouts VSAT Communications: Q330 sites only Problem: UDP packets are dropped intermittently during transit where frequency of occurrence varies for each site and varies greatly from site to site. Resolution: Created a TCP/IP "tunnel" for the UDP packets to transmit through similar to a VPN without the encryption. END **************************************************************************** DATA PROBLEM REPORT ASL2004:140 2004/12/28 ASL DCC Tyler Storm ASL ANTO IU 00/?HN, 00/?HE 2004,361,01:00:00 2004,361,01:00:00 Problem Description OTHER SEED COMMENT REFERENCE C 4540 Channel data may be clipped. The horizontal channels of the KS36000 are clipping at an unusually low level. END **************************************************************************** DATA PROBLEM REPORT DMCQC2007:0033 2007/10/23 IRIS DMC Gillian Sharer DMC R19A TA * 2007,288,22:02:00 2007,290,17:37:00 Problem Description INCORRECT TIME During this time period, the timing at R19A was incorrect. The GPS receiver did not recover after the station was brought back online following an extended outage, resulting in timing errors on the order of two minutes. END PROBLEM RESOLUTION REPORT DMCQC2007:0033 2007/10/23 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The digitizer and GPS antenna were replaced. After day 290 17:37, the timing is correct. END **************************************************************************** DATA PROBLEM REPORT DMCQC2007:0032 2007/10/23 IRIS DMC Mary Templeton DMC GOGA US ?H2 2007,211,13:13:00 2007,211,13:13:00 Problem Description OTHER The ?H2 channel of the Guralp 3Tb at GOGA is at or near the stops. END **************************************************************************** DATA PROBLEM REPORT DMCQC2007:0035 2007/11/07 IRIS DMC Mary Templeton DMC SRU UU EHZ 2007,310,00:34:00 2007,310,00:35:00 Problem Description OTHER The S-13 sensor and digitizer clipped intermittently during a regional event with first arrivals around 2007,310,00:34 UTC. END PROBLEM RESOLUTION REPORT DMCQC2007:0035 2007/11/07 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION UU.SRU..EHZ resumed recording with fidelity after these events. END **************************************************************************** DATA PROBLEM REPORT DMCQC2007:0034 2007/11/01 IRIS DMC Mary Templeton DMC SRU UU EHZ 2007,304,03:07:00 2007,304,05:26:00 Problem Description OTHER The S-13 sensor and digitizer clipped intermittently during several events between2007,304,03:07 and 2007,304,05:26. END PROBLEM RESOLUTION REPORT DMCQC2007:0034 2007/11/01 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION UU.SRU..EHZ resumed recording with fidelity after these events. END **************************************************************************** DATA PROBLEM REPORT DMCQC2007:0037 2007/11/19 IRIS DMC Gillian Sharer DMC Z17A TA BH*/LH* 2007,110,10:10:00 2007,127,2035:00:00 Problem Description OTHER Electronic noise dominates the output. No valid seismic data from: day 110 10:10 utc - day 113 02:50 utc day 123 18:10 utc - day 127 20:35 utc END PROBLEM RESOLUTION REPORT DMCQC2007:0037 2007/11/19 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION Seismic instrument was replaced on day 127 20:35 utc. END **************************************************************************** DATA PROBLEM REPORT DMCQC2007:0036 2007/11/16 IRIS DMC Mary Templeton DMC SRU UU EHZ 2007,318,15:52:00 2007,318,15:53:00 Problem Description OTHER The S-13 sensor and digitizer clipped during the Mw=7.7 Antofagasta, Chile event. END PROBLEM RESOLUTION REPORT DMCQC2007:0036 2007/11/16 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION UU.SRU..EHZ resumed recording with fidelity after these events. END **************************************************************************** DATA PROBLEM REPORT DMCQC2007:0039 2007/12/20 IRIS DMC Mary Templeton DMC SRU UU EHZ 2007,353,09:39:00 2007,353,09:50:00 Problem Description OTHER The S-13 sensor and digitizer clipped during the Mw=7.1 Andreanof Islands, Aleutian Islands event. END PROBLEM RESOLUTION REPORT DMCQC2007:0039 2007/12/20 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION UU.SRU..EHZ resumed recording with fidelity after this event. END **************************************************************************** DATA PROBLEM REPORT DMCQC2007:0038 2007/11/19 IRIS DMC Gillian Sharer DMC OSI CI * 2007,294,15:46:00 2007,318,22:43:00 Problem Description INCORRECT TIME During this time period, OSI had incorrect timing. The last TrinetWatch green clock lock was on 10/21/2007 15:46 utc. TrinetWatch reported a yellow warning on 10/21/2007 16:04 utc. Timing was on the order of several minutes late. END PROBLEM RESOLUTION REPORT DMCQC2007:0038 2007/11/19 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The CPU/MEM/Clock Battery board was replaced. System clock synchronized on 11/14/2007 22:42:57 utc. END **************************************************************************** DATA PROBLEM REPORT UW1996:001 1996/08/27 University of Washington Ken Creager SPYDER DPC CZ LHZ 1996,049,00:00:00 1996,049,00:00:00 Problem Description INCORRECT TIME Clock appears to be OK throughout January 1996, but the P wave for the event on 2/16/96 at 09:44:58 appears to arrive about 30 s late. END PROBLEM RESOLUTION REPORT UW1996:001 2000/04/04 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION On 1996, 047, 06:22 the clock at DPC appears to have lost 37.5 seconds. The clock appears to resume correct timing at 1996, 053, 15:10. The cause of this particular timing problem is unknown, but the clock at DPC has a history of malfunction. Please also see UW1997:003 END **************************************************************************** DATA PROBLEM REPORT DMCQC2007:0031 2007/09/14 IRIS DMC Gillian Sharer DMC SNCC CI * 2007,151,00:00:00 2007,246,00:00:00 Problem Description INCORRECT TIME SNCC had a timing problem from day 151 to 246, with clock drift on the order of minutes. The last good clock check was 05/31/2007 00:00. Arrivals were first noted to be late for the 06/12/2007 07:23 California event. A TrinetWatch system yellow warning of deteriorating clock quality occurred on 06/13/07 23:41 utc. END PROBLEM RESOLUTION REPORT DMCQC2007:0031 2007/09/14 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION SNCC reached a Q=3 lock on day 246. A corroded GPS antenna was replaced on day 255. The timing now looks accurate. END **************************************************************************** DATA PROBLEM REPORT DMCQC2007:0030 2007/08/16 IRIS DMC Mary Templeton DMC SRU UU EHZ 2007,227,23:51:00 2007,227,23:55:00 Problem Description OTHER The S-13 sensor and digitizer clipped during a local event between 2007,227,23:51 and 2007,227,23:55. END PROBLEM RESOLUTION REPORT DMCQC2007:0030 2007/08/16 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION UU.SRU..EHZ resumed recording with fidelity after this event. END **************************************************************************** DATA PROBLEM REPORT DMC1997:001 1997/02/05 IRIS DMC Rick Benson DMC KIP IU ??? 1988,228,00:00:00 1990,276,00:00:00 Problem Description POLARITY REVERSED The polarity of this station has been corrected in the dataless SEED volumes from ASL. END **************************************************************************** DATA PROBLEM REPORT DMC1997:004 1997/12/19 IRIS DMC Rick Benson DMC GAC CN ??? 1997,273,00:00:00 1997,273,00:00:00 Problem Description INCORRECT TIME The Omega clocks that synchronized timing went off the air on this day. but on Oct 6, 1997, a time correction of 999.9 seconds was written into the SEED volumes, but not applied. END **************************************************************************** DATA PROBLEM REPORT DMC1997:005 1997/12/19 IRIS DMC Rick Benson DMC SCHQ CN ??? 1997,273,00:00:00 1997,273,00:00:00 Problem Description INCORRECT TIME The Omega clocks that synchronized timing went off the air on this day. but on Oct 6, 1997, a time correction of 999.9 seconds was written into the SEED volumes, but not applied. END **************************************************************************** DATA PROBLEM REPORT DMC1997:002 1997/12/19 IRIS DMC Rick Benson DMC DRLN CN ??? 1997,273,00:00:00 1997,273,00:00:00 Problem Description INCORRECT TIME The Omega clocks that synchronized timing went off the air on this date, but on Oct 6, 1997, a time correction of 999.9 seconds was written into the SEED volumes, but not applied. END **************************************************************************** DATA PROBLEM REPORT DMC1997:003 1997/12/19 IRIS DMC Rick Benson DMC FRB CN ??? 1997,273,00:00:00 1997,273,00:00:00 Problem Description INCORRECT TIME The Omega clocks that synchronized timing went off the air on this day. but on Oct 6, 1997, a time correction of 999.9 seconds was written into the SEED volumes, but not applied. END **************************************************************************** DATA PROBLEM REPORT DMC1997:006 1997/12/19 IRIS DMC Rick Benson DMC WHY CN ??? 1997,273,00:00:00 1997,273,00:00:00 Problem Description INCORRECT TIME The Omega clocks that synchronized timing went off the air on this day. but on Oct 6, 1997, a time correction of 999.9 seconds was written into the SEED volumes, but not applied. END **************************************************************************** DATA PROBLEM REPORT DMC1997:007 1997/12/19 IRIS DMC Rick Benson DMC FRB CN ??? 1997,275,00:00:00 1997,275,00:00:00 Problem Description OTHER This station lost signal on this day. END **************************************************************************** DATA PROBLEM REPORT DMCQC2007:0044 2007/12/21 IRIS DMC Gillian Sharer DMC Z17A TA BH*/LH* 2007,321,09:22:00 2007,348,16:00:00 Problem Description DATA LOGGER PROBLEM From day 321 09:22 - day 348 16:00, Z17A recorded only noise and no data. END PROBLEM RESOLUTION REPORT DMCQC2007:0044 2007/12/21 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION Normal data resumed after digitizer replacement. END **************************************************************************** DATA PROBLEM REPORT DMCQC2007:0043 2007/12/21 IRIS DMC Gillian Sharer DMC ARV CI * 2007,344,18:21:00 2007,347,02:30:00 Problem Description DATA DROPOUTS Multiple gaps make data unusable from day 344 18:21 utc - day 347 02:30 utc. END PROBLEM RESOLUTION REPORT DMCQC2007:0043 2007/12/21 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION Excessive gaps stop. Normal data resumes on day 347 02:30 utc. END **************************************************************************** DATA PROBLEM REPORT DMCQC2007:0046 2007/12/21 IRIS DMC Gillian Sharer DMC GSC CI * 2007,334,18:58:00 2007,345,17:27:00 Problem Description DATA LOGGER PROBLEM Datalogger has incorrect gain for Z channel. Also, during this period the clock timing is suspect as the GPS never locked. END PROBLEM RESOLUTION REPORT DMCQC2007:0046 2007/12/21 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION Datalogger replaced. Correct gain and timing restored on day 345 17:27. END **************************************************************************** DATA PROBLEM REPORT DMCQC2007:0045 2007/12/21 IRIS DMC Gillian Sharer DMC 214A TA BHN/LHN 2007,283,18:25:00 2007,349,00:27:00 Problem Description OTHER From day 283 18:25 utc - day 349 00:27 utc, the N channel of 214A is suspect. During this time period it exhibited excessive noise and very large pings. END PROBLEM RESOLUTION REPORT DMCQC2007:0045 2007/12/21 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION Seismic sensor was replaced on day 349 00:27 utc. Normal data resumed. END **************************************************************************** DATA PROBLEM REPORT DMCQC2007:0047 2007/12/21 IRIS DMC Gillian Sharer DMC TUQ CI BHE/LHE 2007,297,15:20:00 2007,309,18:50:00 Problem Description DEAD CHANNEL From day 297 15:20 utc - day 309 18:50 utc, the BHE/LHE channel of TUQ went bad. It recorded only noise and no seismic data. END PROBLEM RESOLUTION REPORT DMCQC2007:0047 2007/12/21 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION On day 309 the sensor was replaced. Normal data resumed at 18:50 utc. END **************************************************************************** DATA PROBLEM REPORT DMCQC2007:0040 2007/12/20 IRIS DMC Mary Templeton DMC ATTU IM BH? 2007,353,09:32:00 2007,353,09:34:00 Problem Description OTHER The KS54000 sensor and/or digitizer clipped during the Mw=7.1 Andreanof Islands, Aleutian Islands event. END PROBLEM RESOLUTION REPORT DMCQC2007:0040 2007/12/20 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION IM.ATTU.BH? resumed recording with fidelity after this event. END **************************************************************************** DATA PROBLEM REPORT DMCQC2007:0042 2007/12/21 IRIS DMC Gillian Sharer DMC ARV CI * 2007,331,00:26:00 2007,347,02:30:00 Problem Description DATA DROPOUTS Multiple gaps make data unusable from day 331 00:26 utc - day 337 21:23 utc. END PROBLEM RESOLUTION REPORT DMCQC2007:0042 2007/12/21 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION Excessive gaps stop. Normal data resumes on day 337 21:23 utc. END **************************************************************************** DATA PROBLEM REPORT DMCQC2007:0041 2007/12/21 IRIS DMC Gillian Sharer DMC ISA CI BH*/LH* 2007,321,12:46:00 2007,340,23:30:00 Problem Description DEAD CHANNEL Starting day 321 12:46 utc, ISA BHE/LHE channels recorded only noise and no data. From day 327-340 23:30 utc, all BH*/LH* channels were dead and recorded only digitizer noise. END PROBLEM RESOLUTION REPORT DMCQC2007:0041 2007/12/21 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The power supply and power distribution box were fried. Normal station operation resumed when the power system was upgraded. END **************************************************************************** DATA PROBLEM REPORT HRV1995:116 1995/11/14 Harvard WQC Misha Salganik ASL CWC TS BH* LH* 1995,147,13:03:00 1995,147,13:03:00 Problem Description DATA DROPOUTS Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:116 2001/04/04 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Looking at our current data holdings, the data dropouts observed in 1995 have since been filled in. Since the data set is now complete, no further action will be taken. END **************************************************************************** DATA PROBLEM REPORT HRV1995:117 1995/11/14 Harvard WQC Misha Salganik SPYDER KIP IU LHN LHE LHZ 1995,317,07:38:00 1995,317,07:38:00 Problem Description INVALID RESPONSE Postscript file was placed into /pub/qc/qc_ps. It looks like the amplitude of the observed signal is too small. END PROBLEM RESOLUTION REPORT HRV1995:117 1996/03/14 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION Originally there was a problem with the responses for all of the LH data. When we moved data over to a new data base apparently I had overlapped some time frames associated with certain gain stages which made the gain invalid. I addressed this particular problem some weeks ago, but it would seem that I caused another one with the LHN gains at the same time. I believe the response should be correct now. A new KIP dataless SEED volume will be available from ASL anonymous ftp area (pub/responses) on 15 Mar 96. END **************************************************************************** DATA PROBLEM REPORT HRV1995:118 1995/11/14 Harvard WQC Misha Salganik ASL SMTC TS LHN LHE LHZ 1995,172,15:28:00 1995,172,15:28:00 Problem Description DATA DROPOUTS Postscript file was placed into /pub/qc/qc_ps END **************************************************************************** DATA PROBLEM REPORT HRV1995:119 1995/12/01 Harvard WQC Misha Salganik SPYDER NIL II LHZ LHE 1995,335,05:20:00 1995,335,05:20:00 Problem Description LOW FREQUENCY NOISE Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:119 1995/12/18 IDA Peter Davis Description of Problem Resolution COMMENT The broadband vertical and east-west channels (BHZ,LHZ,VHZ,BHE,LHE, VHE) became very noisy at long periods abruptly on 1995:273-09:30. This condition lasted until 1995:339-16:34 when it ceased just as abruptly. The station is performing correctly at this time. When the remaining field tapes which cover this period arrive at the IDA DCC, we expect to complete our analysis of the source of the problem. At that time, we will update this DPR with any additional information learned through that analysis. END **************************************************************************** DATA PROBLEM REPORT HRV1995:112 1995/09/29 Harvard WQC MIsha Salganik ASL SPA IU LHN LHE 1995,000,97:06:58 1995,000,97:06:58 Problem Description POLARITY REVERSED Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:112 1996/10/16 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION The problem is the mis-orientation of both horizontal instruments rather than a reversed polarity on one component. See ASL1996:040 for details. END **************************************************************************** DATA PROBLEM REPORT HRV1995:113 1995/09/29 Harvard WQC Misha Salganik ASL QIZ CD LHZ 1995,107,07:14:00 1995,107,07:14:00 Problem Description OTHER This particular seismogram looks strange.Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:113 1996/07/03 ASL DCC Tyler Storm Description of Problem Resolution COMMENT The field engineers tell me the data looks like this when a "portion" of the digitizer is bad. Apparently, smaller and larger signals look good, but data within the particular range of the digitizer which is bad appear as vertical lines. If the problem is still occurring, we will schedule a maintenance visit with the local field engineer. END **************************************************************************** DATA PROBLEM REPORT HRV1995:114 1995/09/29 Harvard WQC Misha Salganik ASL TBT IU LHZ 1995,111,05:17:00 0950,111,01:00:00 Problem Description LOW FREQUENCY NOISE Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:114 1995/10/20 ASL Tyler Storm Description of Problem Resolution Comment Again, this problem at TBT is most likely caused by corrosion degrading the equipment (i.e. cables, electronic feedback boxes, etc.). Until the current equipment is replaced, and we figure out a way to avoid this problem in the future (in this vault) we will continue to see this type of problem. No further action will be taken on this particular report. END **************************************************************************** DATA PROBLEM REPORT HRV1995:115 1995/11/14 Harvard WQC Misha Salganik ASL COR IU BH* LH* 1995,138,00:00:00 1995,138,00:00:00 Problem Description HIGH FREQUENCY NOISE Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:115 2001/03/28 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Looking at the data in our holdings, the data look fine for this day. I cannot explain the noise shown in qc figure HRV95:115.ps, but would simply suggest that if the data were either re-requested or reprocessed, the problem might disappear. No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT HRV1995:111 1995/09/26 Harvard WQC Misha Salganik ASL MA2 IU BHE LHE 1995,015,09:06:00 1995,020,04:56:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:111 2007/01/16 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The MA2 station operator recentered the STS1 E component. Data quality returns to normal at 1995, 020, 04:56. END **************************************************************************** DATA PROBLEM REPORT IDA1993:003 1993/04/05 IDA DCC Holly Given IDA NNA II VGZ 1992,300,00:00:00 1993,064,00:00:00 Problem Description DEAD CHANNEL The LaCoste gravimeter was disconnected from the IRIS/IDA Data Acquisition System 92:300 because persistent power outages at the station were deemed potentially harmful to the LaCoste instrument. However, SEED data from NNA channel VGZ was distributed without comment during the period shown above even though no sensor was connected. Distribution has now been disabled pending reconnection of this sensor. No action or resolution report is required. END PROBLEM RESOLUTION REPORT IDA1993:003 1993/04/05 DMC Tim Ahern Description of Problem Resolution TYPE??? No resolution required. END **************************************************************************** DATA PROBLEM REPORT IDA1993:007 1993/07/01 IDA DCC Holly Given IDA ARU II ??Z 1990,278,00:00:00 1993,128,00:00:00 Problem Description LOW FREQUENCY NOISE During a recent maintenance trip we discovered that the STS-1 vertical at ARU was at ambient pressure. We restored vacuum on 93:128 and subsequently traced the vacuum loss to 90:278. The increase in noise (approximately 20 dB) affects periods greater than approximately 25 seconds. After restoration of vacuum Earth tides are again apparent in LP (filtered and decimated) vertical streams; users who include ARU Z data in long period studies should notice a marked improvement. No resolution report is required. END PROBLEM RESOLUTION REPORT IDA1993:007 1993/07/02 DMC Tim Ahern Description of Problem Resolution None needed END **************************************************************************** DATA PROBLEM REPORT IDA1993:006 1993/06/23 IDA DCC Holly Given IDA ALE II ??Z 1993,099,00:00:00 1993,139,00:00:00 Problem Description DEAD CHANNEL There is no vertical component seismic data for the time period above because the mass position was saturated. Normal operation was restored on 93:139 and no resolution report is required. SEED data for this period has been distributed with an appropriate station comment. END PROBLEM RESOLUTION REPORT IDA1993:006 1993/03/24 DMC Tim Ahern Description of Problem Resolution None needed END **************************************************************************** DATA PROBLEM REPORT HRV1995:109 1995/09/22 Harvard WQC Misha Salganik ASL DGR TS LHE LHN 1995,000,78:18:34 1995,000,78:18:34 Problem Description LOW FREQUENCY NOISE Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:109 1996/07/05 ASL DCC Tyler Storm Description of Problem Resolution COMMENT It's really hard to tell what caused the DC offset to jump in this manner. I believe this was some sort of an electronic glitch. Whatever the case, the data before, and after the disturbance look the same. No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT HRV1995:105 1995/07/31 Harvard WQC Misha Salganik SPYDER SHEL II NONE 1995,211,05:11:00 1995,211,05:11:00 Problem Description INCORRECT LOCATION IDA dataless seeed volume contains wrong coordinates of the station. (-4.600 55.483) should be changed into (-15.959 -5.745). END **************************************************************************** DATA PROBLEM REPORT HRV1995:106 1995/08/23 Harvard WQC Misha Salganik ASL ERM II LHE LHN LHZ 1995,000,78:18:34 1995,000,78:18:34 Problem Description POLARITY REVERSED Postscript file was placed into /pub/qc/qc_ps # END PROBLEM RESOLUTION REPORT HRV1995:106 1995/08/25 IDA Peter Davis Description of Problem Resolution COMMENT We concur that all LH* (and BH*,VH* as well) channels are of opposite polarity. The problem began when the station was upgraded on 1995052 and will be corrected when the site is next visited. PROBLEM RESOLUTION REPORT HRV1995:106 95/10/19 IDA Peter Davis Description of Problem Resolution SUPPLEMENT Analysis of the triggered EG* streams from the FBA-23 accelerometers indicate that all EG* and LG* streams are also flipped in polarity at ERM. This would date from the same upgrade date as for the STS-1 streams. END **************************************************************************** DATA PROBLEM REPORT HRV1995:107 1995/09/22 Harvard WQC Misha Salganik ASL BAR TS *HZ 1995,065,07:20:00 1995,102,20:00:00 Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE C 4410 Channel data quality is poor. Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:107 2000/06/14 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The Z component of the STS-1 at BAR exhibits excessive low-frequency noise. It appears from the data that the mass was centered at 1995,102,20:00 and the noise levels returned to normal. END **************************************************************************** DATA PROBLEM REPORT HRV1995:108 1995/09/22 Harvard WQC Misha Salganik ASL BJT CD BHZ LHZ 1995,000,78:18:34 1995,000,78:18:34 Problem Description LOW FREQUENCY NOISE Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:108 1995/12/09 ASL Tyler Storm Description of Problem Resolution Resolution See ASL1995:014 reports. END **************************************************************************** DATA PROBLEM REPORT HRV1995:101 1995/06/16 Harvard WQC Misha Salganik ASL NIL II BHZ LHZ 1995,000,00:00:00 1995,000,00:00:00 Problem Description LOW FREQUENCY NOISE Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:101 1995/07/07 IDA Peter Davis Description of Problem Resolution RESOLUTION The BHZ, LHZ and VHZ channels began very noisy behavior on 1994365 which persisted intermittently until the data logger was upgraded on 1995110. END **************************************************************************** DATA PROBLEM REPORT HRV1995:102 1995/07/31 Harvard WQC Misha Salganik SPYDER KIP IU LHN LHE VHN VHE BHN BHE UHN UHE 1995,210,20:29:00 1995,213,14:01:00 Problem Description POLARITY REVERSED SEED COMMENT REFERENCE C 4700 Channel may have reversed polarity. Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:102 1995/10/30 ASL Tyler Storm Description of Problem Resolution RESOLUTION Yes, the horizontal polarities were reversed at this time. A technician was on site during this time frame, and once he was notified of the problem, he corrected the polarities. I don't have the exact dates of the problem since we were still in test/verification mode. The only reason anyone saw this problem was that I forgot to have KIP taken out of the dialup list while the technician was working on the station. No further action will be taken. SUPPLEMENT It appears that the polarities of the KIP N and E STS1 components were reversed for test from 1995, 210, 20:29 to 1995, 213, 14:01. Data after this have the correct polarity. END **************************************************************************** DATA PROBLEM REPORT HRV1995:104 1995/07/31 Harvard WQC Misha Salganik SPYDER TBT IU LHZ 1995,211,05:11:00 1995,211,05:11:00 Problem Description OTHER The "spiking every minute" problem is observed again. Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:104 1995/10/19 ASL Tyler Storm Description of Problem Resolution Comment This is the same problem we have been seeing off and on for tha past couple of years. It's all related to the the corrosion problem (ref HRV1994:054). Until the current equipment is replaced, and we figure out a way to avoid this problem in the future (in this vault) we will continue to see this type of problem. No further action will be taken on this particular report. **************************************************************** DATA PROBLEM REPORT HRV1995:103 95/07/31 Harvard WQC Misha Salganik SPYDER LBTB GT LHN LHE 1995,211, 5:11 1995,211, 5:11 Problem Description POLARITY REVERSED Postscript file was placed into /pub/qc/qc_ps END **************************************************************************** DATA PROBLEM REPORT HRV1995:100 1995/06/16 Harvard WQC Misha Salganik ASL GUMO IU BHN 1995,000,00:00:00 1995,000,00:00:00 Problem Description DATA GLITCHES Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:100 2002/05/27 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION A couple of digitizer boards were loose, causing spikes and other data glitches. For the full time of the problem, please see ASL1995:003. END **************************************************************************** DATA PROBLEM REPORT DMCQC2007:0011 2007/01/31 IRIS DMC Mary Templeton DMC WMOK US /?H?/ 2006,021,06:20:00 2007,026,19:27:00 Problem Description DEAD CHANNEL On or more masses of this STS-2SG are at or near the stops. END PROBLEM RESOLUTION REPORT DMCQC2007:0011 2007/01/31 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION The STS-2SG was recentered at 2007,026,19:19. END **************************************************************************** DATA PROBLEM REPORT DMCQC2007:0013 2007/02/07 IRIS DMC Mary Templeton DMC PKME US * 2007,026,00:00:00 2007,031,18:30:00 Problem Description DEAD CHANNEL One or more masses of the STS-2 at PKME were drifting and badly off center during this time span. THe E channel recorded no seismic energy. END PROBLEM RESOLUTION REPORT DMCQC2007:0013 2007/02/07 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION PKME\'s STS-2 was recentered on 20007,031. END **************************************************************************** DATA PROBLEM REPORT DMCQC2007:0012 2007/02/07 IRIS DMC Mary Templeton DMC NLWA US * 2007,012,18:24:00 2007,031,23:11:00 Problem Description DEAD CHANNEL The U component of the STS-2 at NLWA was against the stops. The E channel recorded no seismic energy during this time and the N and Z channels contained identical waveforms. END PROBLEM RESOLUTION REPORT DMCQC2007:0012 2007/02/07 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION NLWA\'s sensor was recentered on 2007,031. END **************************************************************************** DATA PROBLEM REPORT DMCQC2007:0015 2007/05/02 IRIS DMC Mary Templeton DMC TX11 IM SH? 2007,119,10:29:00 2007,119,10:29:00 Problem Description DEAD CHANNEL The instrument at TX31 suffered hardware failure; the digitizer is recording dead traces. END **************************************************************************** DATA PROBLEM REPORT DMCQC2007:0014 2007/05/02 IRIS DMC Mary Templeton DMC SRU UU EHZ 2007,119,12:50:00 2007,119,12:51:00 Problem Description OTHER S-13 sensor/digitizer clipped during an Mw=6.2 Andreanof Islands event at ~2007,119,12:42:00. END PROBLEM RESOLUTION REPORT DMCQC2007:0014 2007/05/02 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION UU.SRU..EHZ resumed recording with fidelity after the event. END **************************************************************************** DATA PROBLEM REPORT DMCQC2007:0017 2007/05/03 IRIS DMC Gillian Sharer DMC RCT CI BH* LH* 2007,098,23:28:00 2007,122,22:12:00 Problem Description DEAD CHANNEL There is no seismic data for all channels from 2007 day 098-122. The station recorded digitizer noise during this time period. END PROBLEM RESOLUTION REPORT DMCQC2007:0017 2007/05/03 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION Data resumed on day 122 22:12 after the battery and power supply were replaced at the site. END **************************************************************************** DATA PROBLEM REPORT DMCQC2007:0016 2007/05/03 IRIS DMC Gillian Sharer DMC RCT CI BH* LH* 2006,337,13:40:00 2007,006,10:30:00 Problem Description LOW FREQUENCY NOISE From 2006 day 337-348, RCT experienced repetitive low frequency spiking noise occurring every 10-20 minutes for 7-10 hours per day. The noise is largest on BHN, with amplitudes of approximately 15000 counts. From 2006 day 351-359, the noise source becomes constant, with a noise pulse occurring every 3-5 minutes. From 2006 day 360 - 2007 day 006, noise source becomes intermittent again occurring every 3-5 minutes for time intervals up to 15 hours per day. END PROBLEM RESOLUTION REPORT DMCQC2007:0016 2007/05/03 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION Noise source stops on 2007 day 006. END **************************************************************************** DATA PROBLEM REPORT ASL2000:100 2000/07/03 ASL DCC Valerie Peyton ASL BJI CD *H* 1986,204,10:08:00 1994,104,16:16:00 Problem Description NOISE SEED COMMENT REFERENCE S 800 Station located in high noise background area. Station BJI is located in a high background noise area. The sensors were placed close to the surface. END PROBLEM RESOLUTION REPORT ASL2000:100 2000/07/03 ASL DCC Valerie Peyton Description of Problem Resolution COMMENT There was no opportunity to move station BJI during the time it was up. However, when it was upgraded, moved, and renamed BJT, the installation conditions improved and the noise levels dropped. END **************************************************************************** DATA PROBLEM REPORT ASL2000:101 2000/07/06 ASL DCC Valerie Peyton ASL BJT IC EHZ 1994,145,00:00:00 1994,180,04:36:00 Problem Description DATA GLITCHES SEED COMMENT REFERENCE C 4050 Channel not recording seismic data. The data recorded on the Z component of the GS13 at BJT from 1994,145 to 1994,180 is definitely not seismic data. No events can be seen on this channel during this time span. Instead of seismic data, this channel recorded spikes. There are large spikes every 30 - 35 seconds, and small spikes every 0.4 - 1 second. It is possible that the Z component of the GS13 was not connected to the digitizer during this time period. END PROBLEM RESOLUTION REPORT ASL2000:101 2000/07/06 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The cause of this non-seismic data from the GS13-Z at BJT is unknown. On 1994,180 recording of the EH* channels at BJT temporarily ceased. When recording of the EH* channels resumed on 1997,055 the EHZ channel was recording normal seismic data and events could be seen. END **************************************************************************** DATA PROBLEM REPORT ASL2000:102 2000/07/13 ASL DCC Valerie Peyton ASL BJI CD *** 1986,204,10:07:00 1994,105,00:00:00 Problem Description DATA GLITCHES SEED COMMENT REFERENCE C 4525 Channel has spiking and other data glitches. Throughout the operational lifetime of the station BJI there are random occurrances of spiking and glitches in the data. At times these signals could be described as similar to overdriven calibrations, or to attempts at fixing mass position that have gone wrong. Although these problems occur on all channels, they often do not affect all channels simultaneously. Our best guess is that they were the result of unstable power to the station. END PROBLEM RESOLUTION REPORT ASL2000:102 2000/07/13 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION These data glitches at BJI end when the station ceased operation. On 1993,160 a new digitizing system was installed at BJI, and the severity of the spikes and glitches in the data decreased somewhat. For pictures of some of the glitches, and for more commentary on the problem, please see HRV1994:001 and HRV1994:002 and their associated postscript files. END **************************************************************************** DATA PROBLEM REPORT ASL2000:103 2000/07/18 ASL DCC Valerie Peyton ASL INCN IU 00/*HZ 2000,198,15:00:00 2000,201,15:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The Z component of the STS1 (00 instrument) began losing mass capture at 2000,198,15:00. A day later the mass was completely against the stops. We've emailed the station operator and hope that someone will soon be able to go out and center the mass. A few large events are still mostly visible on the Z on 2000,198 - 200. END PROBLEM RESOLUTION REPORT ASL2000:103 2000/07/25 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The INCN station operator checked the sensor and found it had lost vacuum containment. He re-established vacumm for the STS1-Z and data returned to normal quality on 2000,201,15:00. END **************************************************************************** DATA PROBLEM REPORT ASL2000:104 2000/07/18 ASL DCC Valerie Peyton ASL BJI CD *H* 1992,202,00:00:00 1992,256,03:40:00 Problem Description DATA GLITCHES SEED COMMENT REFERENCE C 4525 Channel has spiking and other data glitches. There are intermittant randomly-occurring data glitches during this time period on the STS1 at BJI. These glitches appear on all channels, sometimes simultaneously. The glitches are similar to those observed when half of the double-ended output is missing. The glitches begin at the end of an extended calibration sequence. Data between the glitches is fine, and all events not affected by the glitches are resolved properly. The glitches occur at least once a day. END PROBLEM RESOLUTION REPORT ASL2000:104 2000/07/18 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION We have no idea what caused the data glitches at BJI, or what fixed them. However, on 1992,256 the glitches end. The last glitch sequence is followed by an extended calibration sequence, similar to the one that occurred right before the problem began. For a picture of one of the occurrances of this problem, see postscript file for DMC1994:013. END **************************************************************************** DATA PROBLEM REPORT ASL2000:105 2000/07/19 ASL DCC Valerie Peyton ASL GUMO IU 10/*HE 2000,080,01:41:00 2000,081,02:25:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The E component of the CMG3-T (10) sensor at GUMO lost mass capture on 2000,080,01:41. END PROBLEM RESOLUTION REPORT ASL2000:105 2000/07/19 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The station operator recentered the instrument on 2000,081,02:25. END **************************************************************************** DATA PROBLEM REPORT ASL2000:106 2000/07/19 ASL DCC Valerie Peyton ASL GUMO IU 10/*HE 2000,083,07:53:00 2000,084,05:54:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The E component of the CMG3-T (10) sensor at GUMO lost mass capture on 2000,083,07:53. END PROBLEM RESOLUTION REPORT ASL2000:106 2000/07/19 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The station operator recentered the instrument on 2000,084,05:54. END **************************************************************************** DATA PROBLEM REPORT ASL2000:107 2000/07/19 ASL DCC Valerie Peyton ASL GUMO IU 10/*HE 2000,100,14:53:00 2000,102,06:13:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The E component of the CMG3-T (10) sensor at GUMO lost mass capture on 2000,100,14:53. END PROBLEM RESOLUTION REPORT ASL2000:107 2000/07/19 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The station operator recentered the instrument on 2000,102,06:13. END **************************************************************************** DATA PROBLEM REPORT ASL2000:108 2000/07/19 ASL DCC Valerie Peyton ASL GUMO IU 10/*HN 2000,117,21:21:00 2000,119,04:55:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The N component of the CMG3-T (10) sensor at GUMO lost mass capture on 2000,117,21:21. END PROBLEM RESOLUTION REPORT ASL2000:108 2000/07/19 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The station operator recentered the instrument on 2000,119,04:55. END **************************************************************************** DATA PROBLEM REPORT ASL2000:109 2000/07/19 ASL DCC Valerie Peyton ASL GUMO IU 10/*HN 2000,129,19:32:00 2000,130,23:17:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The N component of the CMG3-T (10) sensor at GUMO lost mass capture on 2000,129,19:32. END PROBLEM RESOLUTION REPORT ASL2000:109 2000/07/19 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The station operator recentered the instrument on 2000,130,23:17. END **************************************************************************** DATA PROBLEM REPORT DMCQC2007:0019 2007/05/21 IRIS DMC Mary Templeton DMC ATTU IM BH? 2006,302,20:50:00 2007,138,17:23:00 Problem Description OTHER The KS54000 borehole sensor at ATTU failed. Some data was transmitted during this time span, but it contains only digitizer noise. END PROBLEM RESOLUTION REPORT DMCQC2007:0019 2007/05/21 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION The KS54000 was repaired or replaced 2007,138. END **************************************************************************** DATA PROBLEM REPORT DMCQC2007:0018 2007/05/03 IRIS DMC Gillian Sharer DMC 216A TA BHN LHN 2007,103,18:20:00 2007,108,20:10:00 Problem Description DEAD CHANNEL During this time period the [BL]HN channels were not recording seismic data. END PROBLEM RESOLUTION REPORT DMCQC2007:0018 2007/05/03 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The instrument was damaged by a malfunctioning centering motor. Data resumed when the sensor was removed and a new one installed. END **************************************************************************** DATA PROBLEM REPORT DMCQC2007:0022 2007/06/22 IRIS DMC Gillian Sharer DMC ISA CI BHZ LHZ 2007,113,20:42:00 2007,170,23:50:00 Problem Description DEAD CHANNEL The STS-1 vertical host box was removed to repair corrosion. During this time period the Z channel recorded no seismic data, only digitizer noise. END PROBLEM RESOLUTION REPORT DMCQC2007:0022 2007/06/22 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The vertical host box was reinstalled on 06/19/2007. END **************************************************************************** DATA PROBLEM REPORT DMCQC2007:0021 2008/10/02 IRIS DMC Mary Templeton DMC GOGA US ..?H2 2007,159,14:12:00 2007,165,21:24:00 Problem Description DEAD CHANNEL The mass for the ?H2 channel of the borehole Guralp CMG-3Tb at GOGA was against the stops during this time span END PROBLEM RESOLUTION REPORT DMCQC2007:0021 2008/10/02 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION The CMG-3Tb was recentered at 2007,165,21:08. END **************************************************************************** DATA PROBLEM REPORT DMCQC2007:0024 2007/06/28 IRIS DMC Gillian Sharer DMC HOPS BK BHN,LHN 2007,131,20:10:00 2007,159,00:00:00 Problem Description LOW FREQUENCY NOISE During this time period the N channel of HOPS experienced high levels of low frequency noise and DC offset attributed to either cabling problems or the STS-1 electronics box. END PROBLEM RESOLUTION REPORT DMCQC2007:0024 2007/06/28 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION Data returned to normal following a service visit on 06/08/2007. END **************************************************************************** DATA PROBLEM REPORT DMCQC2007:0023 2007/06/28 IRIS DMC Gillian Sharer DMC HOPS BK [BL]HE,[BL]HN 2007,128,23:15:00 2007,131,20:10:00 Problem Description DEAD CHANNEL The horizontal channels record digitizer noise during this time period. The STS-1 electronics boxes were removed for maintenance on 05/08/07 23:15 utc. END PROBLEM RESOLUTION REPORT DMCQC2007:0023 2007/06/28 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The horizontal channels began recording data again when the electronics boxes were reinstalled on 05/11/07 20:10 utc. END **************************************************************************** DATA PROBLEM REPORT DMCQC2007:0026 2007/07/10 IRIS DMC Gillian Sharer DMC SNCC CI * 2007,151,00:00:00 2007,151,00:00:00 Problem Description INCORRECT TIME SNCC has a timing problem and is approximately 3 minutes late as of this posting. The last good clock check was 05/31/2007 00:00. Arrivals are first noted to be late for the 06/12/2007 07:23 California event. A TrinetWatch system yellow warning of deteriorating clock quality occurred on 06/13/07 23:41 utc. END **************************************************************************** DATA PROBLEM REPORT DMCQC2007:0025 2007/06/28 IRIS DMC Gillian Sharer DMC MPP CI * 2007,126,05:52:00 2007,165,08:00:00 Problem Description INCORRECT TIME During this time period the clock time is off at MPP by up to 20 minutes. TrinetWatch system showed yellow warning of deteriorating clock quality starting 05/06/07 05:52 utc. END PROBLEM RESOLUTION REPORT DMCQC2007:0025 2007/06/28 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION On 06/14/07, the datalogger and bad GPS coaxial cable were replaced. Check clock report shows good GPS locks. END **************************************************************************** DATA PROBLEM REPORT DMCQC2007:0028 2007/08/03 IRIS DMC Mary Templeton DMC ATTU IM BHZ 2007,214,03:22:00 2007,214,03:25:00 Problem Description OTHER Recording was swamped on the broadband KS54000 sensor at ATTU by the Mw=6.7 event in the Andreanof Islands. END PROBLEM RESOLUTION REPORT DMCQC2007:0028 2007/08/03 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION ATTU resumed recording with fidelity in the absence of large nearby events. END **************************************************************************** DATA PROBLEM REPORT DMCQC2007:0027 2007/07/31 IRIS DMC Mary Templeton DMC ATTU IM ??Z 2007,210,04:55:00 2007,210,04:57:00 Problem Description OTHER Recording was swamped by Mw=5.9 event in the Komandorskiye Ostrova region. Both channels show clipping. END PROBLEM RESOLUTION REPORT DMCQC2007:0027 2007/07/31 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION ATTU resumed recording with fidelity in the absence of large nearby events. END **************************************************************************** DATA PROBLEM REPORT ASL2000:110 2000/07/19 ASL DCC Valerie Peyton ASL GUMO IU 10/*HN 2000,131,14:40:00 2000,132,00:43:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The N component of the CMG3-T (10) sensor at GUMO lost mass capture on 2000,131,14:40. END PROBLEM RESOLUTION REPORT ASL2000:110 2000/07/19 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The station operator recentered the instrument on 2000,132,00:43. END **************************************************************************** DATA PROBLEM REPORT DMCQC2007:0020 2007/06/12 IRIS DMC Mary Templeton DMC ATTU IM * 2003,297,22:27:00 2003,300,02:27:00 Problem Description DEAD CHANNEL All ATTU channels have zero amplitude. END PROBLEM RESOLUTION REPORT DMCQC2007:0020 2007/06/12 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION ATTU channels resumed recording non-zero amplitudes 2003,300,02:27. END **************************************************************************** DATA PROBLEM REPORT ASL2000:111 2000/07/19 ASL DCC Valerie Peyton ASL GUMO IU 10/*HN 2000,133,13:07:00 2000,136,02:49:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The N component of the CMG3-T (10) sensor at GUMO lost mass capture on 2000,133,13:07. END PROBLEM RESOLUTION REPORT ASL2000:111 2000/07/19 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The station operator recentered the instrument on 2000,136,02:49. END **************************************************************************** DATA PROBLEM REPORT NEICQC2007:116CNINK 2007/04/26 NEIC Dan McNamara DMC INK CN BH* 2007,060,00:00:00 2007,116,00:00:00 Problem Description INVALID RESPONSE gain possibly too low END **************************************************************************** DATA PROBLEM REPORT ASL2000:112 2000/07/19 ASL DCC Valerie Peyton ASL GUMO IU 10/*HN 10/*HE 2000,181,07:59:00 2000,181,23:10:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The N & E components of the CMG3-T (10) sensor at GUMO lost mass capture on 2000,181,07:59. This mass capture loss was precipitated by the arrival of a magnitude 5.8 event located roughly 0.7 degrees from the station. END PROBLEM RESOLUTION REPORT ASL2000:112 2000/07/19 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The station operator recentered the instrument on 2000,181,23:10. END **************************************************************************** DATA PROBLEM REPORT ASL2000:113 2000/07/21 ASL DCC Tyler Storm ASL ENH IC ? 2000,107,09:25:00 2000,110,02:30:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. There was a team on site performing station maintenance during this time frame. END PROBLEM RESOLUTION REPORT ASL2000:113 2000/07/21 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION Maintenance complete; station operating normally. END **************************************************************************** DATA PROBLEM REPORT ASL2000:114 2000/07/24 ASL DCC George Slad ASL LZH CD SH? LH? 2000,125,04:28:00 2000,125,05:20:00 2000,125,05:20:00 Problem Description DIGITIZER PROBLEM SEED COMMENT REFERENCE C 4540 Channel data may be clipped. A large event caused the instrument to clip, rending the data following the initial arrival useless. END PROBLEM RESOLUTION REPORT ASL2000:114 2000/07/24 ASL DCC George Slad Description of Problem Resolution RESOLUTION Normal, unclipped data resume upon deterioration of the event's signal. END **************************************************************************** DATA PROBLEM REPORT ASL2000:115 2000/07/28 ASL DCC Valerie Peyton ASL ANMO IU 10/*H1 2000,194,12:06:00 2000,194,20:40:00 Problem Description SPIKES SEED COMMENT REFERENCE C 4510 Channel has frequent spiking. The background noise level on the nominal N channel of the CMG3-T-B at ANMO skyrockets during this time period. There are lots of spikes of varying amplitude and width, riding on longer period noise. END PROBLEM RESOLUTION REPORT ASL2000:115 2000/07/28 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The ANMO station operator recentered the masses of the CMG3-T-B, and the worst of the noise and spikes has been eliminated. END **************************************************************************** DATA PROBLEM REPORT ASL2000:116 2000/08/02 ASL DCC Valerie Peyton ASL INCN IU 10/* 2000,214,05:19:00 2000,244,02:00:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4620 Incorrect instrument response for low frequencies only The STS-2 at INCN has faulty instrument response to freqencies 1.25Hz and lower. On 1999,214 the vault flooded, damaging the host-box for this instrument. When the host-box was replaced with a new one on 2000,214, the instrument response was found to be fine above 1.25 Hz and corrupt below this point. We are currently in the process of diagnosing the source of the problem. In the meantime, data from this instrument is useful above 1.25Hz. END PROBLEM RESOLUTION REPORT ASL2000:116 2000/09/01 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION A cable on the STS-2 at INCN was replaced, and the instrument response is now correct for all frequencies. END **************************************************************************** DATA PROBLEM REPORT ASL2000:117 2000/08/02 ASL DCC Valerie Peyton ASL JOHN IU **/*** 2000,145,00:00:00 2000,321,01:30:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 450 Time Uncertain. The timing system at JOHN is not operating properly and the system clock is running ambiguously fast. Around 2000,173 the system was 4-5 seconds ahead of GPS time; by 2000,215 the system was roughly 10 seconds ahead of GPS time. We are working with the station operator to diagnose and fix the problem. END PROBLEM RESOLUTION REPORT ASL2000:117 2001/08/09 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The station operator replaced the GPS antenna, which fixed the clock problems that JOHN was experiencing. Accurate timing returns near the beginning of the day on 2000,321 END **************************************************************************** DATA PROBLEM REPORT ASL2000:118 2000/08/03 ASL DCC Valerie Peyton ASL ANMO IU 10/BH* 10/HH* 1999,174,23:00:00 2000,201,14:00:00 Problem Description HIGH FREQUENCY NOISE SEED COMMENT REFERENCE C 4505 Channel has amplitude variations in the high freq background noise. The CMG3-T-B installed at ANMO from 1999,174 to 2000,201 displayed high frequency background noise amplitude variations throughout the time of use. The amplitude of the high frequency background noise will rise precipitously and then fall just as precipitously. The phenomenon is easiest to see in data high-passed at 2Hz. The phenomenon is intermittant and low-amplitude at the beginning of the installation, but by 1999,246 the changes in background noise amplitude occurr with greater frequency. The amplitude of these rises increases throughout this time period, and by the time the time the instrument was replaced, the high amplitude regions were almost twice the amplitude of the normal background noise regions. END PROBLEM RESOLUTION REPORT ASL2000:118 2000/08/03 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The CMG3-T-B was replaced on 2000,201. The replacement CMG3-T-B behaves normally in the high frequencies. END **************************************************************************** DATA PROBLEM REPORT ASL2000:119 2000/08/09 ASL DCC Valerie Peyton ASL ANMO IU BHU BHV BHW HHU HHV HHW 10/BH* 10/HH* 1995,195,00:00:00 2000,293,16:00:00 Problem Description HIGH FREQUENCY NOISE SEED COMMENT REFERENCE C 4501 Channel has high frequency cultural background noise. The CMG3-T-B instruments at ANMO all record ground motion produced by an air compressor operating about 200ft from the station. The air compressor is generally turned on for 1 to 20 minutes at a time. On work days, the air compressor runs for roughly 2 minutes sometime between 6 and 7am local time. On rare occasions it runs at other times during the day. The noise generated by the air compressor consists mostly of frequencies above 1.0Hz. Above 2Hz, the air compressor noise is 1.5 to 5 times the background noise levels, depending on the background noise level that day. The air compressor is not seen on the KS54000 at ANMO, which is located 50m deeper than the CMG3-T-B. END PROBLEM RESOLUTION REPORT ASL2000:119 2000/08/09 ASL DCC Valerie Peyton Description of Problem Resolution COMMENT Just goes to show that CMG3-T-B instruments have very good high frequency response. SUPPLEMENT The borehole instruments at ANMO were moved to the Sandia FACT site on the afternoon of 2000,293. This move was not far enough to merit a change in station name; however, it did move the instruments away from the air compressor which had produced intermittant high frequency noise on the CMG3-T-B, thus eliminating the regularly-recurring high frequency cultural background noise. END **************************************************************************** DATA PROBLEM REPORT DMCQC2007:0029 2007/08/07 IRIS DMC Mary Templeton DMC SRU UU EHZ 2007,218,06:00:00 2007,218,08:52:00 Problem Description OTHER S-13 sensor/digitizer was clipped during two local events during these time spans: 2007,218,06:00 to 2007,218,06:02 2007,218,08:48 to 2007,218,08:52. END PROBLEM RESOLUTION REPORT DMCQC2007:0029 2007/08/07 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION UU.SRU..EHZ resumed recording with fidelity after these events. END **************************************************************************** DATA PROBLEM REPORT IDA2000:019 2000/10/06 IDA DCC Peter Davis IDA KAPI II SHN 2000,258,10:52:00 2000,258,10:52:00 Problem Description DATA LOGGER PROBLEM The output of this channel clips at the above time. The low gain channel from the same sensor remains on scale. We will repair the problem at the next scheduled maintenance visit. END PROBLEM RESOLUTION REPORT IDA2000:019 2002/01/28 IDA Peter Davis Description of Problem Resolution RESOLUTION The signal was restored on 2001,288-07:30. END **************************************************************************** DATA PROBLEM REPORT IDA2000:018 2000/10/06 IDA DCC Peter Davis IDA PFO II *** 2000,279,18:00:00 2000,279,18:00:00 Problem Description DATA LOGGER PROBLEM Transients of unknown source began appearing in all PFO data channels at the above time. We are investigating the problem. END PROBLEM RESOLUTION REPORT IDA2000:018 2000/10/16 IDA Peter Davis Description of Problem Resolution RESOLUTION After extensive investigation, the vault power supply was found to be damaged. The problem was repaired and the sensors put back on line at 2000:290-01:30. Data now appear to be normal. END **************************************************************************** DATA PROBLEM REPORT IDA2000:017 2000/07/21 IDA DCC Peter Davis IDA TAU II *** 2000,139,01:05:00 2000,155,11:51:00 Problem Description INCORRECT TIME The external clock was unlocked during this period. Estimated uncertainty in the time is several seconds. END **************************************************************************** DATA PROBLEM REPORT ASL2000:120 2000/08/09 ASL DCC Valerie Peyton ASL ANMO IU 10/*** 1999,174,23:00:00 2000,250,16:37:00 Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE C 4520 Channel has occasional spiking. The CMG3-T-B instrument at ANMO displays low-frequency noise and spiking on all three components. These disturbances appear to be generated by lightning strikes, static electricity during storms, and power fluctuations. They occur at random intervals. END PROBLEM RESOLUTION REPORT ASL2000:120 2000/08/09 ASL DCC Valerie Peyton Description of Problem Resolution COMMENT We're doing the best we can to shield the CMG3-T-B from electrical disturbances, but the installation is still very sensitive to electrical disturbances. SUPPLEMENT The calibration control lines in the CMG3-T-B cables were the dominant source of the instrument's sensitivity to electrical disturbances. These lines were disabled on 2000,250, reducing the CMG3-T-B's sensitivity to electircal disturbances. This sensitivity has not been eliminated, but sufficiently reduced to consider the problem closed. END **************************************************************************** DATA PROBLEM REPORT ASL2000:121 2000/08/11 ASL DCC Valerie Peyton ASL GUMO IU 10/*HE 2000,224,03:09:57 2000,227,01:17:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The E component of the CMG3-T (10) sensor at GUMO lost mass capture on 2000,224,03:09:57. This mass capture loss was precipitated by the arrival of a local event. END PROBLEM RESOLUTION REPORT ASL2000:121 2000/08/14 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The E component of the CMG3-T at GUMO was centered on 2000,227,01:17:00. END **************************************************************************** DATA PROBLEM REPORT ASL2000:122 2000/08/21 ASL DCC Valerie Peyton ASL GUMO IU 10/*** 2000,232,08:51:00 2000,254,05:25:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. All three channels of the GUMO CMG3-T lost mass capture simultaneously on 2000,232. END PROBLEM RESOLUTION REPORT ASL2000:122 2000/09/18 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The problems with the CMG3-T at GUMO were caused by a bit of flooding in the vault and water entering the cables. After replacing a couple of parts (fuses, cables, etc) the CMG3-T is operating normally and producing good data as of 2000,254. END **************************************************************************** DATA PROBLEM REPORT ASL2000:123 2000/08/21 ASL DCC Valerie Peyton ASL RCBR IU **/*** 2000,220,00:00:00 2000,236,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. Field engineers on location for station maintenance. Tests may be in progress. The activity of the engineers in the vault will compromise data quality and availability on and off during this time period. END PROBLEM RESOLUTION REPORT ASL2000:123 2000/08/23 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The field engineers left station RCBR in good operating condition on 2000,236. END **************************************************************************** DATA PROBLEM REPORT ASL1994:029 1994/11/14 ASL DCC Tyler Storm ASL NWAO IU ? 1994,271,04:36:00 1994,280,05:37:00 Problem Description OTHER SEED COMMENT REFERENCE S 451 Timing MAY be in error, as clock is unlocked. The timing is questionable at NWAO from 28 Sept 94 through 7 Oct 94 when a GPS receiver was installed. The clock was unlocked during the time in question. END PROBLEM RESOLUTION REPORT ASL1994:029 2007/01/23 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION NWAO timing quality returns to normal at 1994, 280, 05:37. END **************************************************************************** DATA PROBLEM REPORT ASL2000:124 2000/08/21 ASL DCC Valerie Peyton ASL RSSD IU **/*** 2000,228,00:00:00 2000,242,01:49:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. Field engineers on location for station maintenance. Tests and calibrations may be in progress. The activity of the engineers in the vault will compromise data quality and availability on and off during this time period. END PROBLEM RESOLUTION REPORT ASL2000:124 2005/06/17 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The ASL field team left RSSD in excellent operational condition at 2000, 242, 01:49. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2000:125 2000/08/28 ASL DCC Valerie Peyton ASL SPA IU 10/*HE 2000,240,07:35:00 2000,242,03:40:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The E component of the CMG3-T at SPA has lost mass capture. END PROBLEM RESOLUTION REPORT ASL2000:125 2000/08/30 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The CMG3-T at SPA was recentered 2000,242,03:40. END **************************************************************************** DATA PROBLEM REPORT ASL2000:126 2000/09/01 ASL DCC Valerie Peyton ASL RCBR IU 00/*H* 2000,245,11:14:00 2000,325,11:58:00 Problem Description OTHER The DC offset on the KS54000 at RCBR has changed drastically. Instead of being around zero, the DC offset is now in the hundreds of thousands of counts for the BH* channels. Except for this huge DC offset, the data are fine. END PROBLEM RESOLUTION REPORT ASL2000:126 2001/04/23 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The DC offsets on the KS54000 at RCBR have returned to normal. The DC offsets for the digitizer are usually set in the DA hard drive. Because the comm link at RCBR is unreliable, the station operator swaps DA hard drives on a regular basis and ships them to us so we can recover more data than is written to tape. A number of the DA hard drives do not have the proper DC offset programmed into them. We are tracking them down so that the DC offset will remain stable. END **************************************************************************** DATA PROBLEM REPORT ASL2000:127 2000/09/12 ASL DCC Valerie Peyton ASL MAKZ IU 00/*HN 00/*HE 1999,153,07:00:00 1999,153,07:00:00 Problem Description POLARITY REVERSED SEED COMMENT REFERENCE C 4710 Channel has reversed polarity. The polarities of the N and E components of the STS-1 at MAKZ are being reversed in data acquisition. END PROBLEM RESOLUTION REPORT ASL2000:127 2000/09/12 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The polarity reversals on the STS-1 E and N components are being corrected in the dataless. To get correct polarities out, be sure to invoke the "Check Reversal" option in rdseed. END **************************************************************************** DATA PROBLEM REPORT ASL2000:128 2000/09/12 ASL DCC Valerie Peyton ASL MAKZ IU HHN HHE SHN SHE 1997,309,00:00:00 1998,239,00:00:00 Problem Description OTHER The STS-2 at MAKZ is misoriented 62 degrees E of N (as measured on the pier during field work to correct it) during this time period. END PROBLEM RESOLUTION REPORT ASL2000:128 2000/09/12 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION This misorientation is corrected in the dataless for the entire time span of misorientation. To obtain the correct orientation, be sure to invoke the "Check Reversal" option in rdseed. The STS-2 at MAKZ was oriented to true north on 1998,239. END **************************************************************************** DATA PROBLEM REPORT ASL2000:129 2000/09/15 ASL DCC Tyler Storm ASL COR IU 00/*HZ 2000,206,15:04:00 2001,031,01:06:00 Problem Description OTHER SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The vertical mass starts to drift at 206,15:04. The mass becomes "pegged" against the stop at 213,22:02. Data are degraded while the mass is drifting and are unusable after the mass hit the stop. END PROBLEM RESOLUTION REPORT ASL2000:129 2001/07/20 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION During a station maintenance trip, a field engineer from ASL was able to recenter the Z component of the STS1 at COR. Data quality has returned to normal. END **************************************************************************** DATA PROBLEM REPORT ASL1994:021 1994/10/13 ASL DCC Tyler Storm ASL NWAO IU ? 1994,272,00:00:00 1994,286,00:00:00 Problem Description OTHER The clock at NWAO has been unlocked since 29 Sept 94. The station operator is in route to investigate the problem. Timing may be inaccurate from 29 Sept until the problem is resolved. END PROBLEM RESOLUTION REPORT ASL1994:021 2007/01/23 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION For the full duration of this problem, please see ASL1994:029. END **************************************************************************** DATA PROBLEM REPORT ASL1994:022 1994/10/13 ASL DCC Tyler Storm ASL PAB IU ? 1994,275,00:00:00 1994,315,00:00:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 451 Timing MAY be in error, as clock is unlocked. The clock has been unlocked at PAB since 2 Oct 94. We have a GPS receiver in route to the station. The timing may be inaccurate from 2 Oct until the station personnel receive and install the new equipment. Hopefully, the receiver won't get stuck in customs for a month. We will just have to see. I'll file a supplemental when I hear from the station operator. END PROBLEM RESOLUTION REPORT ASL1994:022 2007/01/24 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Timing quality at PAB improved with the installation of the new GPS receiver. Timing quality returns to normal by 1994, 315, 00:00. END **************************************************************************** DATA PROBLEM REPORT ASL1994:025 1994/11/03 ASL DCC Tyler Storm ASL PMSA IU BHN,LHN,VHN,UHN 1994,246,23:57:00 1994,250,17:57:00 Problem Description DEAD CHANNEL No data was recorded for the N/S channels at PMSA from 94, 247 through 94, 250, 17:34. Refer to data problem report ASL94:019 for more detail. END PROBLEM RESOLUTION REPORT ASL1994:025 2005/08/08 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT ASL1994:026 1994/11/03 ASL DCC Tyler Storm ASL SMTC TS BHZ, LHZ 1994,161,00:00:00 1994,237,00:00:00 Problem Description OTHER There are negative spikes occurring every minute on BHZ and LHZ at SMTC. At this time I don't have any ideas on the cause of the problem. No further action will be taken unless further information becomes available. END **************************************************************************** DATA PROBLEM REPORT ASL1994:023 1994/11/02 ASL DCC Tyler Storm ASL TSUM IU BHN,LHN,VHN,UHN,BHE,LHE,VHE,UHE, 10/*, 00/* 1994,231,00:00:00 1994,231,00:00:00 Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE S 800 Station located in high noise background area. TSUM is located in a small building. As a result, this site is very susceptible to wind, and other outside forces. I have noticed that the horizontal noise level increases about ten times when the wind is blowing (usually 04:00UTC through 18:00UTC). The noise increase is seen throughout the spectrum, but "low frequency niose" best fits the problem. Possibly these characteristics will change with the season; we will just have to wait and see. No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT IDA2000:020 2000/10/13 IDA DCC Peter Davis IDA FFC II BHZ,LHZ,VHZ 2000,254,00:00:00 2000,258,00:00:00 Problem Description LOW FREQUENCY NOISE Vacuum containment was lost on the STS1-V on day 2000,254 and was restored on 2000,258. Low frequency noise rose considerably while the sensor was at ambient pressure, but since restoration of vacuum, the channels have resumed their normal levels. END **************************************************************************** DATA PROBLEM REPORT ASL1994:024 1994/11/02 ASL DCC Tyler Storm ASL MA2 IU BHN, LHN, VHN, UHN 1994,184,21:48:00 1994,284,02:06:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. All broad-band data channels from the N/S instrument at MA2 are dead from 3 July 94 through the most recent data we have received (20 Sept 94). We are waiting to hear back from the station operator; I'll file a supplemental data report when we know more. END PROBLEM RESOLUTION REPORT ASL1994:024 2007/01/16 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The MA2 station operator revived the STS1 N component. Except for periods of 60 seconds and below, data quality returns to normal at 1994, 284, 02:06. For more information on the response problem for periods of 60 seconds and below, please see dpr ASL2007:022. END **************************************************************************** DATA PROBLEM REPORT DMCQC2007:0002 2007/01/12 IRIS DMC Mary Templeton DMC ACSO US * 2006,346,15:04:00 2007,011,19:07:00 Problem Description DEAD CHANNEL ACSO recorded only digitizer noise during this time span. END PROBLEM RESOLUTION REPORT DMCQC2007:0002 2007/01/12 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION ACSO was taken off the air until it could be fixed. END **************************************************************************** DATA PROBLEM REPORT DMCQC2007:0001 2007/01/12 IRIS DMC Mary Templeton DMC ISCO US * 2006,362,13:13:00 2007,004,21:07:00 Problem Description DATA LOGGER PROBLEM The Q330 at ISCO is rebooting itself frequently resulting in acausal spikes at power up and data gaps. This problem is most frequently caused by power issues. END PROBLEM RESOLUTION REPORT DMCQC2007:0001 2007/01/12 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION ISCO went down at 2007,004,21:07. END **************************************************************************** DATA PROBLEM REPORT IDA2000:009 2000/04/18 IDA DCC Peter Davis IDA MBAR II *** 1999,342,07:25:2000.38 1999,342,07:25:2000.38 Problem Description DATA LOGGER PROBLEM The DAS at this station failed on the above date and was replaced on a site maintenance visit. Normal operation was restored on 2000,038. END **************************************************************************** DATA PROBLEM REPORT DMCQC2007:0004 2007/01/19 IRIS DMC Mary Templeton DMC PKME US ?H? 2007,012,17:02:00 2007,018,19:04:00 Problem Description DEAD CHANNEL One or more masses of the STS-2 at PKME are near the stops. The E channel recorded no seismic energy. The N and Z channels are identical in waveform shape but opposite in phase. END PROBLEM RESOLUTION REPORT DMCQC2007:0004 2007/01/19 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION The STS-2 at PKME was successfully recentered. END **************************************************************************** DATA PROBLEM REPORT IDA2000:008 2000/03/31 IDA DCC Peter Davis IDA KURK II BHZ,LHZ,VHZ 2000,005,03:10:00 2000,005,03:10:00 Problem Description DEAD CHANNEL Data from the STS-1V ceased at this time. The problem is believed to reside in the A2D board. A replacement board has been shipped to the station. END PROBLEM RESOLUTION REPORT IDA2000:008 2000/04/07 IDA Peter Davis Description of Problem Resolution RESOLUTION The board was replaced and data from the STS1-V was restored at 2000,039-05:07. END **************************************************************************** DATA PROBLEM REPORT DMCQC2007:0003 2007/01/13 IRIS DMC Mary Templeton DMC SRU UU EHZ 2007,013,04:34:00 2007,013,04:37:00 Problem Description DATA DROPOUTS S-13 sensor/digitizer clipped during the Mw=8.1 Kuril Islands event at ~2007,013,04:34. END PROBLEM RESOLUTION REPORT DMCQC2007:0003 2007/01/13 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION UU.SRU..EHZ resumed recording with fidelity after the event. END **************************************************************************** DATA PROBLEM REPORT IDA2000:007 2000/02/02 IDA DCC Peter Davis IDA EFI II SL* 1999,351,12:59:00 1999,351,12:59:00 Problem Description DEAD CHANNEL Note IDA2000:003. The SL* channels are now dead also. END **************************************************************************** DATA PROBLEM REPORT DMCQC2007:0006 2007/01/19 IRIS DMC Mary Templeton DMC ACSO US * 2006,346,15:04:00 2007,011,19:07:00 Problem Description DEAD CHANNEL The instrument at ACSO recorded only digitizer noise during this time span. END PROBLEM RESOLUTION REPORT DMCQC2007:0006 2007/01/19 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION Normal recording resumed after the site was serviced. END **************************************************************************** DATA PROBLEM REPORT IDA2000:006 2000/01/17 IDA DCC Peter Davis IDA KDAK II * 1999,315,18:41:00 1999,339,21:51:00 Problem Description OTHER The power conditioner attached to the thermoelectric generator, which supplies all power to the sensors and data logger, failed on 1999,315 and was replaced on 1999,339. Normal recording resumed at that time. END **************************************************************************** DATA PROBLEM REPORT DMCQC2007:0005 2007/01/19 IRIS DMC Mary Templeton DMC NV31 IM * 2006,254,21:22:00 2007,018,00:16:00 Problem Description INCORRECT TIME NV31 had no communicatino between station and GPS receiver during this time span. Timing is known to be incorrect. END PROBLEM RESOLUTION REPORT DMCQC2007:0005 2007/01/19 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION Correct timing was restored when the AIM24 digitizer and GPS unit were replaced. END **************************************************************************** DATA PROBLEM REPORT NEICQC2007:278:G.SSB.00 2007/10/07 NEIC Dan McNamara NEIC SSB G BH* LH* 2007,214,00:00:00 2007,214,00:00:00 Problem Description INVALID RESPONSE Hi Rick, It appears that there was an instrument change at G.SSB.00 that is not reflected in the current dataless. Note the 2 distinct power levels in the following PDF: ftp://hazards.cr.usgs.gov/web/mcnamara/NEIC/PDFs/G.SSB/G.SSB.00.BHZ.ALL.png The higher levels began on 2007:214 (aug. 2) and appear to be incorrect. When compared to a different instrument at the same station (G.SSB.10) the lower power levels are a closer match. ftp://hazards.cr.usgs.gov/web/mcnamara/NEIC/PDFs/G.SSB/G.SSB.10.BHZ.ALL.png So I suspect a new instrument was installed and the dataless has not been updated. Muchas Gracias, Dan END **************************************************************************** DATA PROBLEM REPORT ASL2000:130 2000/09/15 ASL DCC Tyler Storm ASL PAS TS *HE 2000,236,22:27:00 2000,238,03:30:00 Problem Description OTHER SEED COMMENT REFERENCE C 4010 Channel is down. Data are unusable during this time frame. END PROBLEM RESOLUTION REPORT ASL2000:130 2000/09/15 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION Data are back to normal 2000,238,03:30. Reason for outage is unknown. END **************************************************************************** DATA PROBLEM REPORT ASL2000:131 2000/09/21 ASL DCC Valerie Peyton ASL CASY IU 00/*HN 00/*HE 1999,100,00:00:00 1999,100,00:00:00 Problem Description POLARITY REVERSED The polarities of the horizontal channels from the STS-1 at CASY are being reversed in acquisition. END PROBLEM RESOLUTION REPORT ASL2000:131 2000/09/21 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The polarity reversals on the STS-1 E and N components at CASY are being corrected in the dataless. To get correct polarities out, be sure to invoke the "Check Reversal" option in rdseed. END **************************************************************************** DATA PROBLEM REPORT ASL2000:132 2000/09/22 ASL DCC Tyler Storm ASL BILL IU 00/*HE 2000,204,21:45:15 2000,206,04:29:34 Problem Description OTHER SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The E/W STS-1 mass starts to drift at 204,21:45:15. The mass becomes "pegged" against the stop at 205,09:51:49. Data are degraded while the mass is drifting and are unusable after the mass hit the stop. END PROBLEM RESOLUTION REPORT ASL2000:132 2000/09/22 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION Instrument was "centered" at 206,04:29:34. END **************************************************************************** DATA PROBLEM REPORT ASL2000:133 2000/09/25 ASL DCC Tyler Storm ASL JOHN IU 10/*H1 2000,241,19:40:38 2001,203,01:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. Data from the 1 component of the CMG3-T-B are unusable. END PROBLEM RESOLUTION REPORT ASL2000:133 2001/08/13 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION The mass has moved off the stop and is migrating toward the center. The data are useable again. END **************************************************************************** DATA PROBLEM REPORT ASL2000:134 2000/09/26 ASL DCC Valerie Peyton ASL COLA IU 00/*H2 2000,269,23:16:00 2000,270,18:26:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The E (channel 2) of the KS54000 (00 instrument) at COLA is inoperational as of 2000,269,23:16. We've seen this problem in the past, and it has always corrected itself. We've never been able to diagnose the cause of the problem. Until the instrument can be replaced, we'll have to hope that it corrects itself once again. END PROBLEM RESOLUTION REPORT ASL2000:134 2000/09/27 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The COLA KS54000 E component healed itself once again on 2000,270,18:26. Several hours before this self-healing, the 6.4 Tonga Islands event was partially visible on the E component (and fully visible on the completely operational N & Z). END **************************************************************************** DATA PROBLEM REPORT ASL2000:135 2000/09/26 ASL DCC Valerie Peyton ASL TIXI IU 00/*HE 2000,267,22:40:00 2000,271,06:55:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The E component of the STS-1 at TIXI lost mass capture on 2000,267,22:40. The station operator has been alerted and will recenter the instrument at his earliest available opportunity. END PROBLEM RESOLUTION REPORT ASL2000:135 2000/09/27 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The station operator recentered the STS-1 E on 2000,271 and the data returned to normal quality. END **************************************************************************** DATA PROBLEM REPORT ASL2000:136 2000/09/28 ASL DCC Valerie Peyton ASL SSPA IU * 2000,244,20:00:00 2000,304,20:00:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 400 Station has clock problems. The QVI board in the digitizing system at SSPA went belly-up late in the day on 2000,244. The QVI board manages timing and the time-stamping of the data, so once the QVI board breaks, timing starts drifting. The clock is drifting linearly, losing roughly half a second a day: by 2000,246 the clock is off by -0.5seconds; by 2000,247 the clock is off by -1 second; and by 2000,270 the clock is off by a full -8.1 seconds (as calculated by the digitizer). A replacement QVI board was sent to the station and will be installed as soon as the operator has a chance to go out to the station. END **************************************************************************** DATA PROBLEM REPORT ASL2000:137 2000/10/12 ASL DCC Valerie Peyton ASL SPA IU 10/*HN 2000,285,07:30:00 2000,287,05:14:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The N component of the CMG3-T at SPA is against the stop. END PROBLEM RESOLUTION REPORT ASL2000:137 2000/10/13 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The station operator at SPA recentered the CMG3-T on 2000,287. END **************************************************************************** DATA PROBLEM REPORT ASL2000:138 2000/10/12 ASL DCC Valerie Peyton ASL SPA IU 00/*HN 2000,285,07:30:00 2000,287,05:14:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The N component of the STS-1 at SPA is oscillating with a 1000 second period, rendering the data useless. END PROBLEM RESOLUTION REPORT ASL2000:138 2000/10/13 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The station operator at SPA reset the STS-1 N component on 2000,287. END **************************************************************************** DATA PROBLEM REPORT HRV1995:123 1996/01/28 Harvard WQC Misha Salganik ASL LBTB GT * 1995,177,08:54:00 1995,195,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:123 1996/02/08 ASL Tyler Storm Description of Problem Resolution Resolution Technicians were on site at LBTB from 26 June 95 through 13 July 95. During this time frame, we can expect to see some unusable data while various tests were being ran. In this particular case, the seismometer was taken off line and digitizer noise is all that can be seen. END **************************************************************************** DATA PROBLEM REPORT ASL2000:139 2000/10/13 ASL DCC Tyler Storm ASL FURI IU 10/?H? 2000,238,17:57:00 2000,240,07:58:00 Problem Description OTHER SEED COMMENT REFERENCE C 4010 Channel is down. Horizontal data are unuseable for the CMG3-t. END PROBLEM RESOLUTION REPORT ASL2000:139 2000/10/13 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION Instrument was reset 2000,240,07:58:00. END **************************************************************************** DATA PROBLEM REPORT HRV1995:124 1996/01/28 Harvard WQC Misha Salganik ASL LSA CD LH* 1995,184,19:50:00 1995,184,19:50:00 Problem Description INVALID RESPONSE The amplitudes of the observed seismograms are much larger than the expected value. Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:124 1996/06/21 ASL DCC Tyler Storm Description of Problem Resolution COMMENT I cannot find any problems with the CD/LSA response. The station was upgraded to an IRIS type system on 4 Aug 95 (1995, 216). END **************************************************************************** DATA PROBLEM REPORT HRV1995:126 1996/01/28 Harvard WQC Misha Salganik ASL YSS IU LH* 1995,312,07:14:00 1995,312,07:14:00 Problem Description INVALID RESPONSE The aplitude of observed seismograms is too small. Postscript file was placed into /pub/qc/qc_ps END **************************************************************************** DATA PROBLEM REPORT IDA2000:016 2000/07/18 IDA DCC Peter Davis IDA ASCN II BHN,LHN,VHN,BHE,LHE,VHE 2000,166,00:00:00 2000,166,00:00:00 Problem Description DATA GLITCHES Data glitches appear infrequently on the channels derived from the horizontal KS-54000 sensors beginning on this date. The nature of the noise is similar to what is often observed soon after a borehole sensor is installed and is unusual for a sensor in place for so long. The onset of this noise corresponds to a series of earthquakes that occured near Ascension Island from 2000,166 -- 2000,174, so there is a possibility the stress field near the hole has changed. END **************************************************************************** DATA PROBLEM REPORT DMCQC2007:0008 2007/01/19 IRIS DMC Mary Templeton DMC NV11 IM * 2006,254,19:15:00 2007,018,00:16:00 Problem Description INCORRECT TIME NV11 had no communicatino between station and GPS receiver during this time span. Timing is known to be incorrect. END PROBLEM RESOLUTION REPORT DMCQC2007:0008 2007/01/19 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION Correct timing was restored when the AIM24 digitizer and GPS unit were replaced. END **************************************************************************** DATA PROBLEM REPORT IDA2000:015 2000/06/23 IDA DCC Peter Davis IDA LVZ II EHZ,ELZ 1997,193,2000:165:00 1997,193,2000:165:00 Problem Description DATA GLITCHES Data glitches appear frequently on the channels derived from the vertical GS-13 at this station starting on the above date. The problem is sporadic and appears to be gone during the following periods: 1997,311-1997,337; 1998,029-1998,074 and 1998,218-1999,049. The sensor was replaced on 2000,165 when the recording system was upgraded to the Mk7-ISP. END **************************************************************************** DATA PROBLEM REPORT DMCQC2007:0007 2007/01/19 IRIS DMC Mary Templeton DMC NV11 IM SHE SHN 2006,254,22:07:00 2007,018,00:16:00 Problem Description DATA GLITCHES The horizontal channels exhibit bursts 1500 to 4000 count pulses at 4 second intervals. Initially these bursts lasted most of the day, but eventually occurred three times daily for a 1 to 2 hours. END PROBLEM RESOLUTION REPORT DMCQC2007:0007 2007/01/19 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION Replacing the cables and some of the hardware at NV11/NV31 eliminated the glitches. END **************************************************************************** DATA PROBLEM REPORT HRV1995:120 1995/12/01 Harvard WQC Misha Salganik SPYDER CPUP GT LHN LHE 1995,328,06:18:00 1995,328,06:18:00 Problem Description LOW FREQUENCY NOISE Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:120 1996/07/03 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION This is normal for CPUP. The horizontal data is considerably more noisy than the vertical data (especially at longer periods). No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT IDA2000:014 2000/06/22 IDA DCC Peter Davis IDA PFO II EG*,LG* 1997,262,00:00:00 1997,262,00:00:00 Problem Description POLARITY REVERSED The polarity of these channels is reversed. The correct orientation of the instrument has been listed in the dataless SEED volume. END PROBLEM RESOLUTION REPORT IDA2000:014 2002/01/28 IDA Peter Davis Description of Problem Resolution RESOLUTION The polarity should now be correct. END **************************************************************************** DATA PROBLEM REPORT ASL1994:030 1994/11/21 ASL DCC Tyler Storm ASL KBS IU BHE, LHE, VHE, UHE 1994,000,309:00:00 1994,309,00:00:00 Problem Description DEAD CHANNEL The data streams from the Streckeisen STS-1 at KBS appear "dead" because the instrument is not connected. The field engineers found some problems with the instrument, and it was brought back to ASL. A replacement seismometer has been sent to the station. END **************************************************************************** DATA PROBLEM REPORT HRV1995:121 1996/01/28 Harvard WQC Misha Salganik ASL CALB TS BH* LH* 1995,215,01:57:00 1995,215,01:57:00 Problem Description OTHER It looks like all channels are dead. Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:121 1996/07/03 ASL DCC Tyler Storm Description of Problem Resolution COMMENT If the scale on the .ps file is correct, I would say the data was pushed "full-scale". Whatever the case, it is unusable during this time frame. END **************************************************************************** DATA PROBLEM REPORT IDA2000:013 2000/06/22 IDA DCC Peter Davis IDA KAPI II EG*,LG* 1999,305,00:00:00 1999,305,00:00:00 Problem Description POLARITY REVERSED The polarity of these channels is reversed. The correct orientation of the instrument has been listed in the dataless SEED volume. END **************************************************************************** DATA PROBLEM REPORT ASL1994:031 1994/12/06 ASL DCC Tyler Storm ASL SPA IU BHN, LHN, VHN, UHN 1994,204,00:00:00 1994,206,00:00:00 Problem Description OTHER The mass of the N/S seismometer at SPA was against a stop from 23 July 94 through 25 July 94. Data from the N/S instrument is useless during this time frame. No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT DMCQC2007:0009 2007/01/25 IRIS DMC Mary Templeton DMC SCIA US * 2007,017,01:48:00 2007,024,19:34:00 Problem Description OTHER One or more sensor masses are drifting. END PROBLEM RESOLUTION REPORT DMCQC2007:0009 2007/01/25 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION Recentering stopped the masses from drifting. END **************************************************************************** DATA PROBLEM REPORT HRV1995:122 1996/01/28 Harvard WQC Misha Salganik ASL INCN IU *H* 1995,208,14:27:00 1995,257,05:27:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 452 Timing IS in error, as clock is unlocked. The timing of the station's clock is off by a minute or so. Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:122 2005/08/08 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The INCN clock was incorrectly time-stamping the data during this time frame. Timing quality returns to normal at 1995, 257, 05:27. END **************************************************************************** DATA PROBLEM REPORT IDA2000:012 2000/06/22 IDA DCC Peter Davis IDA KDAK II EG*,LG* 1997,160,00:00:00 1997,160,00:00:00 Problem Description DATA LOGGER PROBLEM The output of these channels appears rectified for signals strong enough to register on this insensitive instrument. The FBA itself was replaced, but the problem persisted. Further analysis will be necessary to trace whether the problem is in the AFU or the DAS. END **************************************************************************** DATA PROBLEM REPORT IDA2000:011 2000/04/24 IDA DCC Peter Davis IDA ALE II *** 2000,002,00:00:00 2000,002,00:00:00 Problem Description DATA LOGGER PROBLEM The data multiplexor within the DAS has developed a problem that produces data glitches in the seismic data streams. The channels most strongly effected are BL* channels, but at times the BH* channels are effected as well. The station's data logger is due to be upgraded in Q3-2000 at which time the effected parts will be replaced. END **************************************************************************** DATA PROBLEM REPORT IDA2000:010 2000/04/18 IDA DCC Peter Davis IDA ERM II *** 2000,049,01:02:00 2000,049,01:02:00 Problem Description DATA LOGGER PROBLEM The main power supply at the station failed on the above date. A replacement has been sent. END PROBLEM RESOLUTION REPORT IDA2000:010 2000/07/14 IDA Peter Davis Description of Problem Resolution RESOLUTION The amplifier power supply was repaired on 2000,173. The station returned to normal operation at that time. END **************************************************************************** DATA PROBLEM REPORT ASL2000:140 2000/11/01 ASL DCC George Slad ASL SSE IC 00/?H? 2000,226,12:00:00 2001,055,12:30:00 Problem Description NOISE SEED COMMENT REFERENCE C 4400 Channel data quality is very poor. Periodic (~500 seccond) low-level spiking occurs for several days at a time. By 2000,233 it appears continuously. END PROBLEM RESOLUTION REPORT ASL2000:140 2001/04/20 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION The periodic spiking has stopped. END **************************************************************************** DATA PROBLEM REPORT ASL2000:141 2000/11/02 ASL DCC George Slad ASL SPA IU **/*H* 2000,306,06:20:00 2000,306,09:15:00 Problem Description VERY LARGE PULSE SEED COMMENT REFERENCE C 4525 Channel has spiking and other data glitches. Large pulses, over a million counts peak-to-peak, rendered the data unusable during this time period. We are uncertain as to the cause of the pulsing; it may have been due to activity in the vault. END PROBLEM RESOLUTION REPORT ASL2000:141 2000/11/02 ASL DCC George Slad Description of Problem Resolution RESOLUTION All of the components, with the exceptions of the 00-?HE (STS1), and 10-?HN (CMG3-T) have returned to normal. END **************************************************************************** DATA PROBLEM REPORT ASL2000:142 2000/11/02 ASL DCC George Slad ASL SPA IU 00/*HE 2000,306,06:20:00 2000,324,22:30:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4605 Channel has low sensitivity. The sensitivity of the STS1 east component has been reduced by a factor of about 30 db, after a series of spikes in the data (recorded in ASL2000:141). Stations operators and IRIS/USGS GSN maintenance personnel are investigating the problem. END PROBLEM RESOLUTION REPORT ASL2000:142 2000/11/20 ASL DCC George Slad Description of Problem Resolution RESOLUTION The station operator corrected the problem. We are not certain at this time how the operator went about solving the problem though. Normal data resume on 2000,324 at 22:30 UTC. END **************************************************************************** DATA PROBLEM REPORT ASL2000:143 2000/11/03 ASL DCC Tyler Storm ASL KBS IU 10/*HE 2000,266,08:06:00 2000,315,12:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. E/W data from the STS-2 instrument are dead. END PROBLEM RESOLUTION REPORT ASL2000:143 2000/11/20 ASL DCC George Slad Description of Problem Resolution RESOLUTION The station operator reset the instrument. Normal data resume on 2000,315 at 12:00 UTC. END **************************************************************************** DATA PROBLEM REPORT ASL2000:144 2000/11/07 ASL DCC Tyler Storm ASL OTAV IU 10/*HN 2000,282,20:12:23 2000,314,17:42:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. Channels are down. END PROBLEM RESOLUTION REPORT ASL2000:144 2000/12/01 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION Instrument has been reset. END **************************************************************************** DATA PROBLEM REPORT ASL2000:145 2000/11/16 ASL DCC Tyler Storm ASL SNZO IU 10/*HN 2000,321,05:16:00 2000,325,21:39:00 Problem Description OTHER SEED COMMENT REFERENCE C 4010 Channel is down. N/S data from the CMG3-t are unuseable. END PROBLEM RESOLUTION REPORT ASL2000:145 2000/12/20 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION Instrument was reset 2000,325,21:39. END **************************************************************************** DATA PROBLEM REPORT ASL1994:007 1994/06/30 ASL DCC Tyler Storm ASL MA2 IU BHN,LHN,VHN,UHN 1993,264,00:00:00 1994,037,23:55:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The broad-band n/s channels at MA2 were inoperative (due to a stolen seimometer) from approximately 93,266 through approximately 94,037. The n/s data actually came back earlier than this date, but the data was unsuable until around 94,037. END PROBLEM RESOLUTION REPORT ASL1994:007 2006/11/06 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The broad-band N/S channels at MA2 were fixed. Data quality returns to normal at 1994, 037, 23:55. END **************************************************************************** DATA PROBLEM REPORT ASL2000:146 2000/11/20 ASL DCC George Slad ASL TIXI IU 00/*HZ 2000,325,10:25:00 2000,325,11:35:00 Problem Description VERY LARGE PULSE SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The STS-1 vertical component lost mass capture. Data are unusable during this time period. END PROBLEM RESOLUTION REPORT ASL2000:146 2000/11/20 ASL DCC George Slad Description of Problem Resolution RESOLUTION Station operators recentered the mass. Normal data resume on 2000,325 at 11:35 UTC. END **************************************************************************** DATA PROBLEM REPORT ASL1994:008 1994/06/30 ASL DCC Tyler Storm ASL MA2 IU BH? LH? VH? UH? 1993,260,00:00:00 1994,037,23:55:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4531 Seismometer mass is intermittantly against stops. The station operators at MA2 are having a hard time keeping the vault temperature stabilized. As a result, the seismometer masses have been "pegged" several times when large temperature fluctuations have occurred. There are too many small occurrences to mention, but most of the data from 93,260 through 94,038 is unusable due to this problem. NOTE: The EH (80sps) channels, which are not from the Streckeisens, are not affected by the fluctuations. END PROBLEM RESOLUTION REPORT ASL1994:008 2007/01/17 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The MA2 vault eventually stabilized. Data quality improved to normal at 1994, 037, 23:55. END **************************************************************************** DATA PROBLEM REPORT ASL2000:147 2000/11/22 ASL DCC George Slad ASL SPA IU 00/*HE 2000,327,03:00:00 2000,333,04:00:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4605 Channel has low sensitivity. The sensitivity of the STS1 east component has been reduced by a factor of about 30 db. Stations operators and IRIS/USGS GSN maintenance personnel are investigating the problem. END PROBLEM RESOLUTION REPORT ASL2000:147 2000/11/28 ASL DCC George Slad Description of Problem Resolution RESOLUTION The operator at SPA corrected the problem. The data also have significant offsets prior to the correction. END **************************************************************************** DATA PROBLEM REPORT ASL1994:005 1994/06/29 ASL DCC Tyler Storm ASL LSA CD BH* LH* VH* 1994,105,06:46:00 1994,159,16:27:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4400 Channel data quality is very poor. The broad-band data from the n/s, and e/w instruments at LSA has been intermittently dead or degraded since approximately 94, 105. I was told that the station operators accidentally ran the masses too far out when they were trying to fix something, and that the seismometers would be out of commission until our local tech could visit the station. I really don't see how there can be an intermittent problem if seismometer masses have been ran off, but I'm just describing the data and passing on what I have heard. The most recent data I have looked at was 94, 136, and the problem still existed. The local tech knows about it, and will repair the station on the next maintenance visit. END PROBLEM RESOLUTION REPORT ASL1994:005 1995/04/19 ASL Tyler Storm Description of Problem Resolution RESOLUTION The CD/LSA data appears to be back to normal on 94,159. END **************************************************************************** DATA PROBLEM REPORT ASL2000:148 2000/11/24 ASL DCC Valerie Peyton ASL SPA IU **/*** 2000,311,20:00:00 2000,361,23:40:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 440 Clock Unlocked. The clock at SPA is unlocked. END PROBLEM RESOLUTION REPORT ASL2000:148 2001/01/04 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION After much work, the SPA station operator was able to get the GPS clock working again. Timing at SPA is fine as of 2000,361,23:40. END **************************************************************************** DATA PROBLEM REPORT ASL1994:006 1994/06/29 ASL DCC Tyler Storm ASL CCM IU EH* 1989,253,00:00:00 1994,193,00:00:00 Problem Description OTHER Since CCM was installed, the EH (80sps) channels have not been triggering at the same time. As a result, sometimes the entire event is not recorded on all EH components. The station is scheduled to be upgraded to a IRIS-2 station in Jul 94. When the upgrade takes place, the problem will get corrected. No Problem Resolution Report is needed. END **************************************************************************** DATA PROBLEM REPORT ASL2007:012 2007/01/10 ASL DCC Valerie Peyton ASL MBWA IU 10/*H1, 10/*H2 2006,331,14:27:00 2006,331,14:27:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. MBWA was struck by lightning. The strike caused the CMG3-T-B horizontal components (1 & 2) to go dead. END **************************************************************************** DATA PROBLEM REPORT ASL2000:149 2000/11/27 ASL DCC George Slad ASL SPA IU 10/?HN 2000,331,22:50:00 2000,333,04:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. SPA Guralp CMG3-T The Guralp north component lost mass capture shortly after a short series of spiking recorded on both the STS1 and CMG3-T. ASL maintenance operations and station operators are working on a solution to the problem. END PROBLEM RESOLUTION REPORT ASL2000:149 2000/11/28 ASL DCC George Slad Description of Problem Resolution RESOLUTION The operator at SPA reset the seismometer, enabling it to recenter the mass. END **************************************************************************** DATA PROBLEM REPORT ASL2007:013 2007/01/10 ASL DCC Valerie Peyton ASL SJG IU */* 2006,350,00:00:00 2006,353,07:46:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. An ASL field engineer was at SJG for station maintenance. Expect variable data quality and availability, as well as tests and calibrations. DATA PROBLEM REPORT ASL2007:013 2007/01/10 ASL DCC Valerie Peyton ASL SJG IU */* 2006,350,00:00:00 2006,353,07:46:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. An ASL field engineer was at SJG for station maintenance. Expect variable data quality and availability, as well as tests and calibrations. END **************************************************************************** DATA PROBLEM REPORT ASL2007:010 2007/01/09 ASL DCC Valerie Peyton ASL SSPA IU 10/*H* 2007,003,08:04:00 2007,004,16:41:00 Problem Description OTHER SEED COMMENT REFERENCE C 4400 Channel data quality is very poor. Frequent recenterings of the SSPA STS2 made a mess of the data during this time. END PROBLEM RESOLUTION REPORT ASL2007:010 2007/01/09 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The SSPA STS2 recenterings ended. Data quality returns to normal at 2007, 004, 16:41. END **************************************************************************** DATA PROBLEM REPORT ASL1994:009 1994/07/01 ASL DCC Tyler Storm ASL SBC TS ? 1994,110,00:00:00 1994,129,00:00:00 Problem Description OTHER From 94,110 through 94,129 there are intermittent periods of unusable data due to various calibrations, frequency responses, and other tests. The data that looks unusually "strange" is caused by the vertical seismometer being put into free-period mode. An example of this data can be seen on the vertical components from 94,124 through 94,128. The following data tape, beginning 94,129,2?:??, looked good. No Problem Resolution Report is needed. END **************************************************************************** DATA PROBLEM REPORT ASL2007:011 2007/01/09 ASL DCC Valerie Peyton ASL LSA IC 10/*HE 2006,353,15:33:00 2006,353,15:33:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The E component of the LSA STS2 is mostly dead. During those times when it is not working, data are not useable. In between bad episodes, the data are good. END **************************************************************************** DATA PROBLEM REPORT ASL2007:016 2007/01/11 ASL DCC Valerie Peyton ASL PASC CI 10/BH* 2006,278,00:00:00 2006,278,00:00:00 Problem Description INVALID RESPONSE The CI/PASC 10/BH* data are 40sps, but the 10/BH* dataless information is for 20sps data. END **************************************************************************** DATA PROBLEM REPORT IDA2000:005 2000/01/17 IDA DCC Peter Davis IDA WRAB II S*Z,S*E 1999,324,08:00:00 1999,337,03:00:00 Problem Description DEAD CHANNEL The mass of sensor U, which contributes to the vertical and EW output of the STS-2, was saturated during this period. The problem was resolved by recentering the masses on 1999,337. END **************************************************************************** DATA PROBLEM REPORT ASL2007:017 2007/01/12 ASL DCC Valerie Peyton ASL BILL IU 00/*HZ 2007,011,13:47:00 2007,013,04:57:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The BILL STS1 Z component has fallen against one of its stops. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2007:017 2007/01/17 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The BILL station operator recentered the STS1 Z component. Data quality returns to normal at 2007, 013, 04:57. END **************************************************************************** DATA PROBLEM REPORT IDA2000:004 2000/01/17 IDA DCC Peter Davis IDA JTS II BH*,LH*,VH* 1999,256,00:00:00 1999,334,22:06:00 Problem Description DATA LOGGER PROBLEM The comm board within the DAS began to malfunction on 1999,256 and was replaced on 1999,334. Data collected during this period were highly fragmented as the result. END **************************************************************************** DATA PROBLEM REPORT ASL2007:014 2007/01/11 ASL DCC Valerie Peyton ASL SSPA IU 10/*H* 2007,009,12:17:00 2007,009,12:17:00 Problem Description OTHER SEED COMMENT REFERENCE C 4400 Channel data quality is very poor. Frequent recenterings of the SSPA STS2 made a mess of the data during this time. END **************************************************************************** DATA PROBLEM REPORT IDA2000:003 2000/01/17 IDA DCC Peter Davis IDA EFI II SH* 1999,253,00:00:00 1999,253,00:00:00 Problem Description DEAD CHANNEL The STS2 began to malfunction on 1999,253. It is no longer possible to recenter the masses, and all data on the high gain channels from this sensor are saturated. Data from the low gain channels are still on scale but do not have the full dynamic range possible with normal operation. This instrument will be replaced during the next maintenance visit. END PROBLEM RESOLUTION REPORT IDA2000:003 2002/01/28 IDA Peter Davis Description of Problem Resolution RESOLUTION The damaged STS2 was replaced by a Guralp CMG-3T at 2001,109-06:00. Data now appear to be normal. END **************************************************************************** DATA PROBLEM REPORT ASL2007:015 2007/01/11 ASL DCC Valerie Peyton ASL SJG IU BHE, LHE, VHE, UHE 1994,258,14:37:00 1995,238,17:43:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4625 Invalid instrument response. The SJG STS1 E component response is incorrect. END PROBLEM RESOLUTION REPORT ASL2007:015 2007/01/11 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The SJG STS1 E component response was corrected. Data quality returns to normal at 1995, 238, 17:43. END **************************************************************************** DATA PROBLEM REPORT IDA2000:002 2000/01/17 IDA DCC Peter Davis IDA BORG II * 1999,248,00:00:00 1999,248,00:00:00 Problem Description INCORRECT TIME The GPS external clock failed sometime before 1999,248 (due to unreadable data tapes, the beginning time is indeterminate). A replacement clock was installed on 1999,308 and locked up briefly but then it too failed. We are working with the station operator to resolve the problem. END **************************************************************************** DATA PROBLEM REPORT IDA2000:001 2000/01/17 IDA DCC Peter Davis IDA PFO II * 1999,333,19:36:00 1999,354,17:28:00 Problem Description INCORRECT TIME The GPS external clock failed on 1999,336 and was replaced on 1999,354. Because of the free running internal oscillator on the IDA Mk7-ISP, the time could be accurately corrected except for the period 1999,336-17:44 -- 1999,336-23:37. END **************************************************************************** DATA PROBLEM REPORT ASL1994:003 1994/06/23 ASL DCC Tyler Storm ASL TATO IU ALL 1994,141,00:00:00 1994,141,00:00:00 Problem Description OTHER Technicians were on site at TATO from around the last week of May 94 through the second week of Jun 94. There will be intermittent outages, and tests throughout this time frame. END **************************************************************************** DATA PROBLEM REPORT ASL1994:004 1994/06/28 ASL DCC Tyler Storm ASL VTV TS HLZ,N,E 1994,122,03:26:00 1994,122,03:26:00 Problem Description OTHER The background increases about ten times. I don't know the duration of the disturbance because it is a triggered channel with a time limit. The anomaly looks a lot like what we have seen at SMTC (ASL1994:002). Similar to the problem at SMTC, the signal is periodic, but doesn't look like a calibration. END **************************************************************************** DATA PROBLEM REPORT ASL2007:018 2007/01/12 ASL DCC Valerie Peyton ASL MDJ IC */* 2006,321,10:14:00 2006,326,04:20:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 454 Timing MAY be in error, as GPS system is not operating consistently. The MDJ GPS timing system was not operating properly during this time. Timing quality cannot be guaranteed. OBLEM RESOLUTION REPORT ASL2007:018 2007/01/12 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The MDJ GPS timing system recovered proper timing at 2006, 326, 04:20. END **************************************************************************** DATA PROBLEM REPORT ASL1994:001 1994/02/10 ASL DCC Tyler Storm ASL SJG IU BHE, LHE, VHE, UHE 1993,284,05:28:00 1994,041,19:16:00 Problem Description NOISE SEED COMMENT REFERENCE C 4507 Channel has excessively high noise levels. All channels from the E/W seismometer at SJG have been unusually noisy since the second week of Oct 93. It appears the vaccuum was lost in the belljar containing the seismometer. END PROBLEM RESOLUTION REPORT ASL1994:001 1994/03/02 ASL Tyler Storm Description of Problem Resolution RESOLUTION An ASL technician instructed the station operator at SJG to reapply the vacuum to the bell jar. Since the operator's visit, the noise has drastically diminished. It appears that the bell jars at SJG are slowly leaking. As a result, the station operator will have to periodically check the bell jars and make adjustments if necessary. END **************************************************************************** DATA PROBLEM REPORT ASL2007:019 2007/01/16 ASL DCC Valerie Peyton ASL MA2 IU BHN LHN VHN UHN 1995,019,01:03:00 1995,031,02:08:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The N component of the MA2 STS1 is dead during this time. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2007:019 2007/01/16 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The MA2 station operator fixed the STS1 N component. Data quality returns to normal at 1995, 031, 02:08. END **************************************************************************** DATA PROBLEM REPORT ASL1994:002 1994/06/28 ASL DCC Tyler Storm ASL SMTC TS HHZ,N,HLZ,N,E 1993,230,04:01:45 1993,230,04:01:45 Problem Description OTHER It appears that after an event triggers, the background increases about ten times. The higher background is periodic, but doesn't look like a calibration. Another example of the same type of signal can be seen on the HH channels at 00:45:30 on day 94, 023. END **************************************************************************** DATA PROBLEM REPORT ASL2000:150 2000/11/28 ASL DCC George Slad ASL KONO IU 00/?H?, 10/?H? 2000,293,22:39:00 2000,333,08:20:00 Problem Description SPIKES SEED COMMENT REFERENCE C 4510 Channel has frequent spiking. The STS1 and CMG3-T both exhibit low-level spiking with a recurrence interval of approximately 15 minutes. END PROBLEM RESOLUTION REPORT ASL2000:150 2000/11/28 ASL DCC George Slad Description of Problem Resolution RESOLUTION The spiking on the seismometers at KONO has stopped. The cycling of the humidifier used in the tunnel was the cause of the spiking. END **************************************************************************** DATA PROBLEM REPORT ASL2000:151 2000/11/29 ASL DCC George Slad ASL SPA IU 00/?HE 2000,334,01:30:00 2000,339,02:30:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4605 Channel has low sensitivity. The sensitivity of the STS1 east component has been reduced by a factor of about 30 db. Stations operators and IRIS/USGS GSN maintenance personnel are investigating the problem. END PROBLEM RESOLUTION REPORT ASL2000:151 2001/08/30 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The operator at SPA corrected the sensitivity problem with the STS1-E. Data quality and instrument sensitivity return to normal early in the day on 2000,339. The cause of the problem was a loose wire in one of the connectors on the instrument. The problem should now be fixed for good; that is, until it breaks again. END **************************************************************************** DATA PROBLEM REPORT ASL2000:152 2000/12/01 ASL DCC Valerie Peyton ASL TSUM IU 10/*H* 1999,001,00:00:00 1999,001,00:00:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4625 Invalid instrument response. In the frequencies above roughly 0.9sec (1.1Hz), power spectral density plots show the instrument noise of the STS2 to be well above the background noise levels at the station. Above approximately 1 Hz the STS2 noise levels begin to ramp up and oscillate between 10 db and 15 db above the presumed earth noise as recorded on the STS-1. END **************************************************************************** DATA PROBLEM REPORT ASL2000:153 2000/12/06 ASL DCC George Slad ASL SPA IU 00/*HZ 2000,006,23:12:00 2000,008,18:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The vertical component of the STS1 at SPA lost the mass position. The data are unusable. END PROBLEM RESOLUTION REPORT ASL2000:153 2000/12/06 ASL DCC George Slad Description of Problem Resolution RESOLUTION Station operators recentered the mass of the STS1 vertical component at SPA. Normal data resume. END **************************************************************************** DATA PROBLEM REPORT ASL2000:154 2000/12/06 ASL DCC George Slad ASL SPA IU 10/*HE 2000,053,14:00:00 2000,054,19:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The east component of the Guralp at SPA lost mass position. The data are unusable. END PROBLEM RESOLUTION REPORT ASL2000:154 2000/12/06 ASL DCC George Slad Description of Problem Resolution RESOLUTION Station operators recentered the mass of the Guralp east component at SPA. Normal data resume. END **************************************************************************** DATA PROBLEM REPORT ASL2000:155 2000/12/06 ASL DCC George Slad ASL SPA IU 00/*HN 2000,026,03:30:00 2000,028,04:01:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 1835 TEST DATA Station operators at SPA performed maintenance on the north component of the STS1. A calibration-like sinusoid signal renders the data unusable during this time period. END PROBLEM RESOLUTION REPORT ASL2000:155 2000/12/06 ASL DCC George Slad Description of Problem Resolution RESOLUTION After the maintenance visit at SPA, normal data resume on the STS1. END **************************************************************************** DATA PROBLEM REPORT ASL2000:156 2000/12/06 ASL DCC George Slad ASL SPA IU 00/*H* 2000,007,22:45:00 2000,026,05:04:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4105 Seismometer not connected to digitizer. The STS1 was either completely disconnected or turned off. END PROBLEM RESOLUTION REPORT ASL2000:156 2000/12/06 ASL DCC George Slad Description of Problem Resolution RESOLUTION Station operators serviced the STS1 at SPA. Normal data follows. END **************************************************************************** DATA PROBLEM REPORT ASL1994:018 1994/09/15 ASL DCC Tyler Storm ASL LSZ IU UH? VH? LH? BH? 00/?H? 1994,217,00:00:00 2001,171,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE C 4503 Channel has intermittant low frequency noise. The change in input power to the DC/DC converter is showing up on the seismic data. We noticed some unusual cycling on the VH data when we viewed an entire day of data. Later, we saw that this noise corresponds exactly with noise pattern for the channel which monitors the input power. The technicians explained that the slow rise we see on the input power channel is when the solar pannels are "charging up". Following the up-swing, there is a period where the batteries are sufficiently changed, and a relay is kicking on and off. During the time frame where the relay is turning on and off, the (power) data looks very "spiky"; this is what is also showing up on the seismic data. It's not clear at this time how much, if any, this will impair the data. This if a difficult problem to explain. It would be very helpful to view the postscript file where the top trace is VHZ and the bottom trace is incoming power. See postscript file in /pub/qc/qc_ps/ASL94:018_prr.ps. END PROBLEM RESOLUTION REPORT ASL1994:018 2006/07/04 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION This input power-induced noise on the LSZ STS1 data streams was solved when the power system was upgraded. Data quality returns to normal at 2001, 171, 00:00 END **************************************************************************** DATA PROBLEM REPORT ASL2000:157 2000/12/07 ASL DCC George Slad ASL SPA IU 20/?H1,20/?H2 2000,020,12:45:00 2000,027,10:30:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The KS54000 at SPA was out of service. The operator attempted trouble shooting. END PROBLEM RESOLUTION REPORT ASL2000:157 2000/12/07 ASL DCC George Slad Description of Problem Resolution RESOLUTION The SPA operator was successful. The horizontal components of the KS54000 resumed normal recording. END **************************************************************************** DATA PROBLEM REPORT ASL1994:019 1994/10/17 ASL DCC Tyler Storm ASL PMSA IU BHE, LHE, VHE, UHE 1994,275,23:32:00 1994,278,15:07:00 Problem Description DEAD CHANNEL No E/W data was recorded at PMSA from 2 Oct 94 at 23:32 through 7 Oct 94 at 00:32. The operator reset the system, and the channels came back to life. Undoubtedly, this is the same problem we observed with problem report ASL94:010, and ASL94:012 where the streams just stop recording. We have sent a new version of the software to PMSA that should fix the problem. END PROBLEM RESOLUTION REPORT ASL1994:019 2005/08/08 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT ASL2000:158 2000/12/07 ASL DCC George Slad ASL SPA IU 20/?HZ 2000,020,12:45:00 2001,080,16:40:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The vertical component of the KS54000 is out of service. END PROBLEM RESOLUTION REPORT ASL2000:158 2001/08/30 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The KS54000 at SPA had to be returned to ASL for repairs. The instrument was removed, and acquisition of the channels eventually stopped, after midday on 2001,080. Once the instrument is repaired and we are able to return to SPA, the KS54000 will be reinstalled. END **************************************************************************** DATA PROBLEM REPORT ASL1994:016 1994/09/02 ASL DCC Tyler Storm ASL RPV TS ? 1994,196,23:22:00 1994,200,18:49:00 Problem Description INCORRECT TIME RPV received a bad time reference from the timing standard. As a result, the data is time tagged incorrecly by two seconds from 15 July 94, 23:22 - 19 July 94, 18:49. END PROBLEM RESOLUTION REPORT ASL1994:016 1994/09/07 Description of Problem Resolution **************************************************************** DATA PROBLEM REPORT ASL1994:017 94/09/02 ASL DCC Tyler Storm ASL XAN IU ? 1994,245,00:00:00 1994,245,00:00:00 Problem Description OTHER I just received this message from ASL's China technician, "Due to lack of rain in Northern China this year, XAN station commercial power will be off every Sunday, Monday, and Tuesday for an indefinite period (therefore XAN weekly tapes will only contain 4 days of data)." I assume the area around XAN station is dependent on hydro power. Whatever the case, there will be three days, every week, where XAN will not record data. END **************************************************************************** DATA PROBLEM REPORT ASL2000:159 2000/12/07 ASL DCC George Slad ASL SPA IU 20/* 2000,028,22:40:00 2001,080,16:40:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The horizontal components of the KS54000 are out of service. A maintenance visit by ASL personnel is needed to repair/replace the seismometer. END PROBLEM RESOLUTION REPORT ASL2000:159 2001/08/30 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The KS54000 at SPA had to be returned to ASL for repairs. The instrument was removed, and acquisition of the channels eventually stopped, after midday on 2001,080. Once the instrument is repaired and we are able to return to SPA, the KS54000 will be reinstalled. END **************************************************************************** DATA PROBLEM REPORT ASL2007:001 2007/01/08 ASL DCC Valerie Peyton ASL QSPA IU 10/*H* 2006,359,20:21:00 2006,363,17:40:00 Problem Description DATA GLITCHES SEED COMMENT REFERENCE C 4410 Channel data quality is poor. Power outages at the South Pole Station caused the QSPA CMG3-T-B to cool beyond proper operation of the instrument. Mass position swings and spiking induced by cold temperatures severely impacted data quality during this time period. END PROBLEM RESOLUTION REPORT ASL2007:001 2007/01/08 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Once South Pole Station power stabilized, the QSPA CMG3-T-B fully recovered. Data quality returns to normal at 2006, 363, 17:40. END **************************************************************************** DATA PROBLEM REPORT ASL2007:002 2007/01/08 ASL DCC Valerie Peyton ASL QSPA IU 00/*H* 2006,359,20:21:00 2006,363,12:07:00 Problem Description DATA GLITCHES SEED COMMENT REFERENCE C 4410 Channel data quality is poor. Power outages at the South Pole Station caused the QSPA 54000 to cool beyond proper operation of the instrument. Mass position swings and spiking induced by cold temperatures severely impacted data quality during this time period. END PROBLEM RESOLUTION REPORT ASL2007:002 2007/01/08 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Once South Pole Station power stabilized, the QSPA 54000 fully recovered. Data quality returns to normal at 2006, 363, 12:07. END **************************************************************************** DATA PROBLEM REPORT ASL2007:000 2007/01/08 ASL DCC Valerie Peyton ASL QSPA IU 20/*H* 2006,359,14:41:00 2006,361,18:28:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. All three components of the QSPA STS2 have fallen against their stops. At first, large events may be visible. Beyond that, data are not useable. END PROBLEM RESOLUTION REPORT ASL2007:000 2007/01/08 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION We remotely recentered the QSPA STS2. Data quality returns to normal at 2006, 361, 18:28. END **************************************************************************** DATA PROBLEM REPORT ASL2007:005 2007/01/09 ASL DCC Valerie Peyton ASL GUMO IU 10/*H* 2007,008,17:39:00 2007,008,18:51:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4531 Seismometer mass is intermittantly against stops. All three components of the GUMO CMG3-T were sent to their stops by the arrival of a local event. END PROBLEM RESOLUTION REPORT ASL2007:005 2007/01/09 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The GUMO station operator recentered the CMG3-T. Data quality returns to normal at 2007, 008, 18:51. END **************************************************************************** DATA PROBLEM REPORT ASL1994:010 1994/07/01 ASL DCC Tyler Storm ASL PMSA IU BHN,LHN,VHN,UHN 1994,081,00:00:00 1994,099,19:16:00 Problem Description DEAD CHANNEL The broad-band n/s data at PMSA was not recorded from 94,081 through 94,099. I'm unsure of what the problem was, but we advised the station operator to reset the system and it seemed to do the trick. Who knows? END PROBLEM RESOLUTION REPORT ASL1994:010 2005/08/08 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT ASL2007:006 2007/01/09 ASL DCC Valerie Peyton ASL COLA IU */* 2006,350,05:09:00 2006,351,04:41:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 454 Timing MAY be in error, as GPS system is not operating consistently. The GPS system at COLA was having difficulty maintaining its lock on the GPS time marks. Timing quality cannot be guaranteed. OBLEM RESOLUTION REPORT ASL2007:006 2007/01/09 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The COLA GPS system resumed solid lock on the GPS time marks. Timing quality returns to normal at 2006, 351, 04:41. END **************************************************************************** DATA PROBLEM REPORT ASL1994:011 1994/07/06 ASL DCC Tyler Storm ASL CCM IU ? 1994,187,00:00:00 1994,195,00:00:00 Problem Description OTHER CCM will be down for a week, or so, while the station is being upgraded with IRIS-2 equipment. The technician on site said said he will also look into a modem problem the station operator had mentioned. It seems that nobody has been able to get into the CCM via dailup lately. If all goes well, CCM will most likely be back on line later in July, 94. No Problem Resolution Report is needed. END **************************************************************************** DATA PROBLEM REPORT ASL2007:003 2007/01/08 ASL DCC Valerie Peyton ASL TIXI IU 00/*HN 2006,364,15:00:00 2007,006,05:10:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4625 Invalid instrument response. The TIXI STS1 N component has invalid response beginning at 3 Hz and continuing on through all the lower frequencies. Data should only be used with great caution. END PROBLEM RESOLUTION REPORT ASL2007:003 2007/01/08 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The TIXI station operator fixed the problem with the STS1 N component. Data quality returns to normal at 2007, 006, 05:10. END **************************************************************************** DATA PROBLEM REPORT ASL2007:004 2007/01/08 ASL DCC Valerie Peyton ASL TIXI IU 00/*HE 2007,006,04:47:00 2007,009,10:42:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The TIXI STS1 E component is dead. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2007:004 2007/01/09 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The TIXI station operator recentered the STS1 E component. Data quality returns to normal at 2007, 009, 10:42. END **************************************************************************** DATA PROBLEM REPORT ASL2007:009 2007/01/09 ASL DCC Valerie Peyton ASL SSPA IU 10/*H* 2006,362,06:30:00 2006,364,13:04:00 Problem Description OTHER SEED COMMENT REFERENCE C 4400 Channel data quality is very poor. Frequent recenterings of the SSPA STS2 made a mess of the data during this time. END PROBLEM RESOLUTION REPORT ASL2007:009 2007/01/09 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The SSPA STS2 recenterings ended. Data quality returns to normal at 2006, 364, 13:04. END **************************************************************************** DATA PROBLEM REPORT ASL1994:014 1994/09/01 ASL DCC Tyler Storm ASL SJG IU BHE, LHE, VHE, UHE 1994,231,18:30:00 1994,258,15:38:00 Problem Description OTHER SEED COMMENT REFERENCE C 4010 Channel is down. It appears the mass in the E/W instrument at SJG has been against a stop since 19 Aug 94. An ASL technician is working with the station operator to fix the problem. END PROBLEM RESOLUTION REPORT ASL1994:014 1994/09/14 ASL Tyler Storm Description of Problem Resolution COMMENT The problem with the E/W data at SJG was more involved than we had thought. The operator has found that the feedback electronics box for the E/W instrument is bad. We have shipped the replacement equipment to SJG, and we are now waiting to hear back from the station operator. >PROBLEM RESOLUTION REPORT ASL94:014 >94/09/21 ASL Tyler Storm >Description of Problem Resolution >Supplemental > >The operator received and installed the new feedback electronics box for the > E/W instrument at SJG on 16 Sept 94. > No further action will be taken. SUPPLEMENT Data quality returns to normal at 1994, 258, 15:38. END **************************************************************************** DATA PROBLEM REPORT ASL1994:015 1994/09/02 ASL DCC Tyler Storm ASL VTV TS ? 1994,196,23:07:00 1994,197,14:23:00 Problem Description INCORRECT TIME VTV received a bad time reference from the timing standard. As a result, the data is time tagged incorrecly by two seconds from 15 July 94, 23:07 - 16 July 94, 14:23. END **************************************************************************** DATA PROBLEM REPORT ASL2007:007 2007/01/09 ASL DCC Valerie Peyton ASL COLA IU */* 2007,008,16:01:00 2007,011,01:29:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 454 Timing MAY be in error, as GPS system is not operating consistently. The GPS system at COLA was having difficulty maintaining its lock on the GPS time marks. Timing quality cannot be guaranteed. END PROBLEM RESOLUTION REPORT ASL2007:007 2007/01/16 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The COLA GPS system resumed solid lock on the GPS time marks. Timing quality returns to normal at 2007, 011, 01:29. END **************************************************************************** DATA PROBLEM REPORT ASL1994:012 1994/07/15 ASL DCC Tyler Storm ASL PMSA IU BHE,LHE,VHE,UHE 1994,188,23:34:00 1994,194,03:50:00 Problem Description DEAD CHANNEL No data was recorded from the broad-band E/W sensor at PMSA from approximately 94, 190 through 94, 194, 04:00 (UTC). The operator re-downloaded the DA software, and the channels came back. This problem appears to be some sort of a software glitch that comes up for no apparent reason. We are looking into it. END PROBLEM RESOLUTION REPORT ASL1994:012 2005/08/08 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT ASL2007:008 2007/01/09 ASL DCC Valerie Peyton ASL SSPA IU 10/*H* 2006,354,09:20:00 2006,354,16:51:00 Problem Description OTHER SEED COMMENT REFERENCE C 4400 Channel data quality is very poor. Frequent recenterings of the SSPA STS2 made a mess of the data during this time. END PROBLEM RESOLUTION REPORT ASL2007:008 2007/01/09 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The SSPA STS2 recenterings ended. Data quality returns to normal at 2006, 354, 16:51. END **************************************************************************** DATA PROBLEM REPORT ASL1994:013 1994/07/15 ASL DCC Tyler Storm ASL MLAC TS ? 1993,127,00:00:00 1994,013,00:00:00 Problem Description OTHER We have distributed some missnamed data. From 1993, 127 through 1994, 013, ASL was shipping the Terrascope station MLAC named as MLA. When I say "shipping" I mean we were sending it to IRIS DMC. Data users who have requested MLA data during this time frame should be aware of the problem. Since 1994, 014 the data has been shipped with the proper station code, MLAC. I will file a supplemental report when entire time span of MLAC data is correctly renamed at IRIS DMC. END PROBLEM RESOLUTION REPORT ASL1994:013 2007/01/22 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Using SeismiQuery to look at the IRIS DMC data holdings, it appears that all the MLA data was deleted and replaced with properly-named MLAC data. END **************************************************************************** DATA PROBLEM REPORT ASL2000:160 2000/12/08 ASL DCC Valerie Peyton ASL INCN IU 10/*H* 2000,313,06:00:00 2000,313,09:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. All three masses on the STS-2 at INCN are against their stops. END PROBLEM RESOLUTION REPORT ASL2000:160 2000/12/08 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The operator at INCN recentered the STS-2 on 2000,313,09:00. END **************************************************************************** DATA PROBLEM REPORT ASL2000:161 2000/12/11 ASL DCC Valerie Peyton ASL TIXI IU 00/*HZ 2000,345,10:05:00 2000,347,09:50:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The Z component of the STS1 at TIXI lost mass capture on 2000,345,10:05. END PROBLEM RESOLUTION REPORT ASL2000:161 2000/12/12 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The TIXI station operator recentered the STS1-Z and the data returned to normal quality on 2000,347,09:50. END **************************************************************************** DATA PROBLEM REPORT ASL2000:162 2000/12/11 ASL DCC Valerie Peyton ASL SPA IU 10/*HE 2000,346,04:30:00 2000,346,20:07:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The E component of the CMG3T at SPA lost mass capture on 2000,346,04:30. END PROBLEM RESOLUTION REPORT ASL2000:162 2000/12/12 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The SPA station operator centered the CMG3T-E and the data returned to normal quality on 2000,346,20:07. END **************************************************************************** DATA PROBLEM REPORT ASL2000:163 2000/12/13 ASL DCC Tyler Storm ASL OTAV IU 00/?H? 2000,313,16:48:00 2000,353,16:53:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. Channels are dead. END PROBLEM RESOLUTION REPORT ASL2000:163 2000/12/20 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION Instruments were reset 2000,353,16:53. END **************************************************************************** DATA PROBLEM REPORT ASL2000:164 2000/12/13 ASL DCC Valerie Peyton ASL TRQA IU **/*** 2000,302,12:00:00 2000,318,20:00:00 Problem Description OTHER SEED COMMENT REFERENCE S 110 TEST DATA: Calibration, and testing in progress. Field engineers were on location at TRQA during this time span working on the station installation; expect some problems with data quality and availability. Calibrations were run at various times on days 314 thru 316 of 2000. END PROBLEM RESOLUTION REPORT ASL2000:164 2000/12/13 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Field engineers finished installation and left station TRQA at the end of the day on 2000,318. END **************************************************************************** DATA PROBLEM REPORT ASL2000:165 2000/12/19 ASL DCC Tyler Storm ASL PET IU 10/?HE 2000,284,08:29:00 2001,112,22:30:00 Problem Description OTHER SEED COMMENT REFERENCE C 4010 Channel is down. The mass of the E/W GS-13 is against the stop. Data are unusable. END PROBLEM RESOLUTION REPORT ASL2000:165 2001/04/25 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The station operator at PET found that the E/W amplifier had gone bad. A replacment amplifier was sent to the station and installed by the operator. The E/W component of the GS-13 at PET is once more operational and producing good quality data. END **************************************************************************** DATA PROBLEM REPORT ASL2000:166 2000/12/28 ASL DCC George Slad ASL ANMO IU 10/*** 2000,363,00:00:00 2001,019,00:00:00 Problem Description CHANNEL ORIENTATION Field engineers installed the Guralp CMG3-T-B. The orientation is unknown at this point in time. A precise orientation will be given soon. END PROBLEM RESOLUTION REPORT ASL2000:166 2001/04/26 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The orientation of the ANMO CMG3-T-B was determined to be 323 degrees on 2001,018 and subsequently entered into the ANMO dataless volume. If you have a dataless volume that predates the end of January 2001, please retrieve the latest dataless so that you will have one that contains the proper orientation for the CMG3-T-B. END **************************************************************************** DATA PROBLEM REPORT ASL2007:052 2007/03/02 ASL DCC Valerie Peyton ASL BJT IC EHZ SHZ 1994,145,00:00:00 1994,231,05:13:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The GS13 Z component at BJT is dead during this time. Data are not useable. END **************************************************************************** DATA PROBLEM REPORT ASL2007:053 2007/03/02 ASL DCC Valerie Peyton ASL BJT IC EHN SHN 1994,231,05:09:00 1994,235,05:32:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The BJT GS13 N component is dead during this time. Data are not useable. END **************************************************************************** DATA PROBLEM REPORT ASL2007:050 2007/03/02 ASL DCC Valerie Peyton ASL BJT IC */* 1994,342,02:03:00 1994,343,07:15:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. BJT was undergoing station maintenance during this time. Expect variable data quality and availability, as well as calibrations and other tests. END **************************************************************************** DATA PROBLEM REPORT ASL2007:051 2007/03/02 ASL DCC Valerie Peyton ASL BJT IC */* 1994,242,04:25:00 1994,242,06:35:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. BJT was undergoing station maintenance during this time. Expect variable data quality and availability, as well as calibrations and other tests. END **************************************************************************** DATA PROBLEM REPORT ASL2007:056 2007/03/02 ASL DCC Valerie Peyton ASL BJT IC EH? SH? 1994,145,00:00:00 1994,343,03:00:00 Problem Description OTHER The BJT GS13 instruments went through several sensitivity changes in the first 199 days of operation. All of these sensitivity changes have been documented in the IC/BJT dataless volume. Though we have no field documentation to explain the changes, nor records of the GS13 instrument sensitivities or amplifier settings, it appears that the following may have occurred: 1994,145,00:00:00 The original GS13 amplifiers were set to a non-standard attenuation setting. These original amplifiers also had a non-standard amplifier board. 1994,242,05:00:00 Attenuation on the GS13 amplifiers was increased by 12dB. 1994,245,01:26:00 Attenuation on the GS13 amplifiers was decreased by 6dB. 1994,342,02:03:00 The standard GS13 amplifier board was installed. 1994,343,03:00:00 Attenuation on the GS13 amplifiers was changed; we are assuming it was set to the standard switch position of 6.4. Assuming that all the GS13 amplifiers were set to a sensitivity of 6.4 at 1994, 343, 03:00, we calculated the GS13 instruments themselves to have the following sensitivities: Z = 1289.1 N = 1250 E = 1171.9 These values are quite low, considering the nominal GS13 sensitivity is 1500. However, we were not able to determine what the final amplifier setting was for the BJG GS13 instruments. In the absence of that information, we chose to assume that the final amplifier setting was the standard setting of 6.4 used at all of our other stations. We then determined the total sensitivity (stage 99) needed for each GS13 epoch in order to match the background noise PSDs for the GS13s and the STS1s at BJT. From there we were able to use the assumed amplification of 6.4, the known digitizer sensitivity, and the empirically derived total sensitivity to back out the rest of the piece of the sensitivity cascade. If we find the assumption of an amplifier gain of 6.4 to be in error, we will modify the sensitivity cascade accordingly. In the meantime, the IC/BJT GS13 dataless information is correct to the best of our knowledge. END **************************************************************************** DATA PROBLEM REPORT ASL2007:057 2007/03/05 ASL DCC Valerie Peyton ASL KEV IU 10/*HN 2007,064,18:47:00 2007,064,21:43:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4625 Invalid instrument response. The KEV CMG3-T N component appears to have lost over half of its double-ended output. The response is ~30dB too low. END **************************************************************************** DATA PROBLEM REPORT ASL2007:054 2007/03/02 ASL DCC Valerie Peyton ASL BJT IC BHN LHN UHN VHN BHZ LHZ UHZ VHZ 1994,343,02:20:00 1994,343,07:21:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The N and Z components of the BJT STS1 are dead during this time. END **************************************************************************** DATA PROBLEM REPORT ASL2007:055 2007/03/02 ASL DCC Valerie Peyton ASL BJT IC BHE LHE UHE VHE 1994,343,02:20:00 1994,347,08:09:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The BJT STS1 E component is dead during this time period. END **************************************************************************** DATA PROBLEM REPORT ASL2007:058 2007/03/08 ASL DCC Valerie Peyton ASL KEV IU 10/*HN 2007,066,15:56:00 2007,067,19:07:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4625 Invalid instrument response. The KEV CMG3-T N component appears to have lost over half of its double-ended output. The response is ~30dB too low. END **************************************************************************** DATA PROBLEM REPORT ASL2007:059 2007/03/09 ASL DCC Valerie Peyton ASL HIA IC */* 2007,030,05:24:00 2007,103,08:17:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 454 Timing MAY be in error, as GPS system is not operating consistently. The timing system at HIA is reporting an inaccurate state of health. Timing quality cannot be guaranteed. END **************************************************************************** DATA PROBLEM REPORT ASL2007:041 2007/02/12 ASL DCC Valerie Peyton ASL KONO IU 10/*H* 2006,349,22:20:00 2007,044,16:37:00 Problem Description HIGH FREQUENCY NOISE SEED COMMENT REFERENCE C 4508 Channel has high levels of high frequency noise. KONO CMG3-T data contain high-frequency noise (2hz and higher). END **************************************************************************** DATA PROBLEM REPORT ASL2007:042 2007/02/13 ASL DCC Valerie Peyton ASL QSPA IU 10/*H* 2007,044,08:23:00 2007,044,17:37:00 Problem Description OTHER SEED COMMENT REFERENCE C 1840 Calibration data Calibrations were run on the QSPA CMG3-T-B instrument during this time frame. Data are not useful for earthquake analysis. END **************************************************************************** DATA PROBLEM REPORT ASL2007:040 2007/02/09 ASL DCC Valerie Peyton ASL MBWA IU */* 2007,040,00:00:00 2007,044,16:37:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. An ASL field team is at MBWA for station maintenance. Expect variable data quality and availability, as well as calibrations and other tests. END **************************************************************************** DATA PROBLEM REPORT ASL2007:045 2007/02/16 ASL DCC Valerie Peyton ASL QSPA IU 20/*H* 2007,045,07:52:00 2007,045,17:06:00 Problem Description OTHER SEED COMMENT REFERENCE C 1840 Calibration data Calibrations were run on the QSPA STS2 instrument during this time frame. Data are not useful for earthquake analysis. END **************************************************************************** DATA PROBLEM REPORT ASL2007:046 2007/02/19 ASL DCC Valerie Peyton ASL QSPA IU 20/*H* 2007,047,21:17:00 2007,051,14:28:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. All three components of the QSPA STS2 have fallen against their stops. Data are not useable. END **************************************************************************** DATA PROBLEM REPORT ASL2007:043 2007/02/15 ASL DCC Valerie Peyton ASL TRQA IU 00/*H* 10/*H* 2007,045,18:18:00 2007,059,09:46:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. Both TRQA seismometers are completely dead. END **************************************************************************** DATA PROBLEM REPORT ASL2007:044 2007/02/15 ASL DCC Valerie Peyton ASL TRQA IU 00/LDO 2007,045,18:39:00 2007,059,18:20:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The TRQA Parscientific microbarograph is dead. END **************************************************************************** DATA PROBLEM REPORT ASL2007:049 2007/02/27 ASL DCC Valerie Peyton ASL QSPA IU 50/*H* 2007,054,17:15:00 2007,054,18:19:00 Problem Description OTHER SEED COMMENT REFERENCE C 1840 Calibration data Calibrations were run on the QSPA cold borehole Guralp instrument during this time frame. Data are not useful for earthquake analysis. END **************************************************************************** DATA PROBLEM REPORT ASL2007:047 2007/02/21 ASL DCC Valerie Peyton ASL QSPA IU 20/*HN 2007,051,14:28:00 2007,052,17:19:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The N component of the QSPA STS2 has fallen against its stop. Data are not useable. END **************************************************************************** DATA PROBLEM REPORT ASL2007:048 2007/02/21 ASL DCC Valerie Peyton ASL QSPA IU 30/*H* 2007,052,07:44:00 2007,052,18:18:00 Problem Description OTHER SEED COMMENT REFERENCE C 1840 Calibration data Calibrations were run on the QSPA STS1 Z instrument during this time frame. Data are not useful for earthquake analysis. END **************************************************************************** DATA PROBLEM REPORT DMC00:001 2000/08/23 IRIS DMC Rick Benson DMC DRLN CN ??? 1900,000,02:2000:12.35 1900,000,02:2000:12.35 Problem Description DATA DROPOUTS Zeroed DC offset using the GDMON program. Station reset at 18:38 because of the number of error codes END **************************************************************************** DATA PROBLEM REPORT DMC00:003 2000/08/24 IRIS DMC Rick Benson DMC RES CN ??? 1900,000,21:2000:17.49 1900,000,21:2000:17.49 Problem Description DATA DROPOUTS During this time, phone line problem and /or modem problems. END **************************************************************************** DATA PROBLEM REPORT DMC00:002 2000/08/23 IRIS DMC Rick Benson DMC FRB CN ??? 1900,000,01:2000:06.42 1900,000,01:2000:06.42 Problem Description INCORRECT TIME Stating has been having problems with timing, multiple internal syncs to GD clock. About 49 minutes of data missing between 06:42 and 12:05 END **************************************************************************** DATA PROBLEM REPORT DMC00:005 2000/08/24 IRIS DMC Rick Benson DMC YKW3 CN B? 1900,000,04:2000:17.49 1900,000,04:2000:17.49 Problem Description DATA DROPOUTS Channels down, reset. END **************************************************************************** DATA PROBLEM REPORT DMC00:004 2000/08/24 IRIS DMC Rick Benson DMC YKW3 CN EHN 1900,000,27:2000:17.56 1900,000,27:2000:17.56 Problem Description DATA DROPOUTS Station undergoing numerous resets, terminating this channel for this time period. END **************************************************************************** DATA PROBLEM REPORT ASL2007:030 2007/01/25 ASL DCC Valerie Peyton ASL PAS TS LL* 2003,337,19:22:00 2003,343,21:41:00 Problem Description OTHER SEED COMMENT REFERENCE C 4106 Incorrect instrument recorded on this channel. It appears that a seismometer was recorded on the TS/PAS accelerometer channels during this time period. The TS/PAS dataless has acceleration data response information only for the LL* channels. Since the data recorded appears to be velocity data, the user should beware that it has no accompanying dataless. END PROBLEM RESOLUTION REPORT ASL2007:030 2007/01/25 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Proper acceleratometer data recording on the TS/PAS LL* channels resumed at 2003, 343, 21:41. END **************************************************************************** DATA PROBLEM REPORT ASL2007:031 2007/01/29 ASL DCC Tyler Storm ASL MIDW IU 00/* 2007,028,21:15:30 2007,028,21:15:30 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. STS-2 is down. END **************************************************************************** DATA PROBLEM REPORT ASL2007:034 2007/02/05 ASL DCC Valerie Peyton ASL QSPA IU */* 2007,032,22:27:00 2007,032,22:27:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. An ASL field team is currently on location at QSPA. Data quality and availability may be erratic. In addition, calibrations and other tests should be expected. END **************************************************************************** DATA PROBLEM REPORT ASL2007:035 2007/02/05 ASL DCC Valerie Peyton ASL QSPA IU 50/*H1 2007,034,09:44:00 2007,034,09:44:00 Problem Description HIGH FREQUENCY NOISE SEED COMMENT REFERENCE C 4508 Channel has high levels of high frequency noise. The 1 component of the cold CMG3-T-B has a high-frequency noise and response problem. High frequency noise levels, and the high frequency PSD, are up to 41dB too high starting at 0.5 Hz and continuing on through all the high frequencies. END **************************************************************************** DATA PROBLEM REPORT ASL2007:032 2007/01/29 ASL DCC Valerie Peyton ASL MIDW IU */* 2007,029,02:03:00 2007,029,02:03:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 452 Timing IS in error, as clock is unlocked. The MIDW GPS system is not working correctly and the clock appears to be unlocked. Timing quality should be considered incorrect. SUPPLEMENT 2007, 032 The MIDW station operator found that the GPS antenna had been blown off the station building by excessively strong winds. The GPS cable was severed in the process, and the antenna itself may well have been damaged. It will be a while before this timing problem can be fixed. END **************************************************************************** DATA PROBLEM REPORT ASL2007:033 2007/02/05 ASL DCC Valerie Peyton ASL QSPA IU 00/* 20/* 40/* 2007,034,11:40:00 2007,036,18:06:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE C 4210 Time uncertain. The QSP1 DA at QSPA has a timing problem during this time. Timing quality should be considered suspect for location codes 00, 20, and 40. Data streams from the 54000, STS2 and GS13 instruments should be considered to potentially have incorrect timing. END PROBLEM RESOLUTION REPORT ASL2007:033 2007/02/05 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The timing problem on the QSP1 DA at QSPA was caused by tickerror problems on the digitizers. The problem was resolved by resetting the DA. Timing quality returns to normal at 2007, 036, 18:06. END **************************************************************************** DATA PROBLEM REPORT ASL2007:038 2007/02/08 ASL DCC Valerie Peyton ASL QSPA IU 00/*H* 20/*H* 2007,039,08:53:00 2007,039,21:27:00 Problem Description OTHER SEED COMMENT REFERENCE C 1840 Calibration data Calibrations were run on the QSPA 54000 and STS2 instruments during this time frame. Data are not useful for earthquake analysis. Please note that the only reason we see a calibration signal on the STS2 at this time is because of cross-talk somewhere in the system. The STS2 was not intentionally calibrated, which means that the calibration signal observed on the STS2 channels cannot be used for instrument analysis. END **************************************************************************** DATA PROBLEM REPORT ASL2007:039 2007/02/09 ASL DCC Valerie Peyton ASL MBWA IU 10/*HZ 2007,040,06:40:00 2007,042,01:48:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. ASL field engineers are on site at MBWA for station maintenance. They have removed the CMG3-T-B from the hole to replace it. END **************************************************************************** DATA PROBLEM REPORT ASL2007:036 2007/02/06 ASL DCC Valerie Peyton ASL WVT IU *HZ 2007,036,19:45:00 2007,036,19:45:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The Z component of the WVT STS1 has fallen against its stops. Data are not useable. END **************************************************************************** DATA PROBLEM REPORT ASL2007:037 2007/02/07 ASL DCC Valerie Peyton ASL HKT IU */* 2007,036,00:00:00 2007,036,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. An ASL field engineer is on site at HKT for station maintenance. Expect variable data quality and availability, as well as calibrations and other tests. END **************************************************************************** DATA PROBLEM REPORT ASL2007:020 2007/01/16 ASL DCC Valerie Peyton ASL MA2 IU BHE LHE VHE UHE 1994,173,15:22:00 1994,180,12:08:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The E component of the MA2 STS1 has fallen against one of its stops. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2007:020 2007/01/16 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The MA2 station operator recentered the STS1 E component. Data quality returns to normal at 1994, 180, 12:08. END **************************************************************************** DATA PROBLEM REPORT ASL2007:023 2007/01/17 ASL DCC Valerie Peyton ASL TUC IU */* 2007,015,16:20:00 2007,018,22:10:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. An ASL employee is at TUC for station calibration and maintenance. Expect variable data availability and quality, as well as calibrations and other tests. END PROBLEM RESOLUTION REPORT ASL2007:023 2007/01/19 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION TUC station maintenance ended and the station was left in excellent operational condition. Data quality returns to normal at 2007, 018, 22:10. END **************************************************************************** DATA PROBLEM REPORT ASL2007:024 2007/01/17 ASL DCC Valerie Peyton ASL DWPF IU 00/*H* 2007,005,15:37:00 2007,018,20:43:00 Problem Description NOISE SEED COMMENT REFERENCE C 4509 Channel has elevated low frequency noise levels. It appears the 54000 at DWPF may have been hit by lightning or some other power surge at 2007, 005, 15:37. After this event, noise levels increase by 5 - 20 dB starting at roughly 20 seconds and continuing through all the longer periods. END PROBLEM RESOLUTION REPORT ASL2007:024 2007/01/23 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The DWPF station operator was able to fix the long period noise problem on the 54000. Data quality returns to normal at 2007, 018, 20:43. END **************************************************************************** DATA PROBLEM REPORT ASL2007:021 2007/01/16 ASL DCC Valerie Peyton ASL MA2 IU BHN LHN VHN UHN 1994,179,05:59:00 1994,181,00:30:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The MA2 STS1 N component is dead during this time. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2007:021 2007/01/16 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The MA2 station operator fixed the STS1 N component. Data quality returns to normal at 1994, 181, 00:30. END **************************************************************************** DATA PROBLEM REPORT ASL2007:022 2007/01/17 ASL DCC Valerie Peyton ASL MA2 IU BHN LHN VHN UHN 1994,248,02:06:00 1995,019,01:04:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4620 Incorrect instrument response for low frequencies only The response of the MA2 STS1 N component is incorrect starting at 22 seconds and continuing down through all the longer periods. Data should only be used with caution. END PROBLEM RESOLUTION REPORT ASL2007:022 2007/01/17 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The instrument response of the MA2 STS1 N component returned to normal at 1995, 019, 01:04. END **************************************************************************** DATA PROBLEM REPORT ASL2007:027 2007/01/22 ASL DCC Valerie Peyton ASL QSPA IU 20/*H* 2007,021,01:56:00 2007,021,01:56:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The QSPA STS2 masses have fallen against their stops. At first, large events are visible. After that, data are not useable. END PROBLEM RESOLUTION REPORT ASL2007:027 2007/01/22 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION We were able to remotely recenter the QSPA STS2. Data quality returns to normal at 2007, 022, 20:07. END **************************************************************************** DATA PROBLEM REPORT ASL2007:028 2007/01/22 ASL DCC Valerie Peyton ASL SJG IU */* 2007,016,17:34:00 2007,023,21:02:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 454 Timing MAY be in error, as GPS system is not operating consistently. The SJG Quanterra reported a few tick errors, and the timing quality indicators in the data headers show there is some type of problem with the GPS timing system. Timing quality cannot be guaranteed during this time. END PROBLEM RESOLUTION REPORT ASL2007:028 2007/01/23 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The SJG timing system returned to normal operation and timing quality returns to normal at 2007, 023, 21:02. END **************************************************************************** DATA PROBLEM REPORT ASL2007:025 2007/01/18 ASL DCC Valerie Peyton ASL DWPF IU 00/*H1 2007,018,20:12:00 2007,023,20:40:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4625 Invalid instrument response. The 1 component of the DWPF 54000 has lost half of its double-ended output. The instrument response curve is the correct shape, but ~30dB too low. END PROBLEM RESOLUTION REPORT ASL2007:025 2007/01/23 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The DWPF station operator was able to solve the problem with the 54000 1 component. Data quality returns to normal at 2007, 023, 20:40. END **************************************************************************** DATA PROBLEM REPORT ASL2007:026 2007/01/19 ASL DCC Valerie Peyton ASL PAB IU 00/*HE 2007,019,10:39:00 2007,023,11:28:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The E component of the PAB STS1 is pegged. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2007:026 2007/01/23 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The PAB station operator was able to recenter the STS1 E component. Data quality returns to normal at 2007, 023, 11:28. END **************************************************************************** DATA PROBLEM REPORT ASL2007:029 2007/01/24 ASL DCC Valerie Peyton ASL PMSA IU 00/* 2007,023,14:06:00 2007,024,02:31:00 Problem Description OTHER SEED COMMENT REFERENCE C 1840 Calibration data Calibrations were run on the PMSA STS1 seismometers during this time. END PROBLEM RESOLUTION REPORT ASL2007:029 2007/01/24 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The PMSA STS1 calibrations ended at 2007, 024, 02:31. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT IDA2006:021 2006/09/08 IDA DCC Erik Klimczak IDA HOPE II BHE,BHN,LHE,LHN,VHE,VHN 1900,000,00:00:00 1900,000,00:00:00 Problem Description Problem Description DEAD CHANNEL The North-South and East-West channels for the STS-1 sensor have drifted out of normal operating range about day 169 and 234, respectively. The East-West channels came back about day 246. However, the mass position channels for the STS-1 sensors are in an unstable state and need to be recentered. END **************************************************************************** DATA PROBLEM REPORT IDA2006:020 2006/09/08 IDA DCC Erik Klimczak IDA EFI II BHZ,LHZ,VHZ 2006,209,00:00:00 2006,215,00:00:00 Problem Description DEAD CHANNEL The vertical channels for the KS-54000 Seismometer were out during this time period. These channels were restored after the station operator rebooted the DAS. END **************************************************************************** DATA PROBLEM REPORT ASL2007:090 2007/08/09 ASL DCC cgilbertormton ASL TIXI IU 00/?HE 2007,219,07:07:00 2007,113,16:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. E/W STS-1 is "pegged", data are unusable. END **************************************************************************** DATA PROBLEM REPORT ASL2007:091 2007/12/04 ASL DCC cgilbertormton ASL YSS IU * 2007,120,00:00:00 2007,113,16:00:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 450 Time Uncertain. Timing is in question during this time. END **************************************************************************** DATA PROBLEM REPORT IDA2006:019 2006/06/28 IDA DCC Erik Klimczak IDA WRAB II BB*-10 2006,018,00:00:00 2006,025,00:00:00 Problem Description DEAD CHANNEL The short period channels for the STS-2 seismometer were out during this period. The vertical channels were restored when the station operator recentered the masses for the STS-2 seismometer. END **************************************************************************** DATA PROBLEM REPORT IDA2006:014 2006/06/28 IDA DCC Erik Klimczak IDA RAYN II BHZ,LHZ,VHZ 2006,023,00:00:00 2006,023,00:00:00 Problem Description DATA LOGGER PROBLEM The broadband channels from the KS-54000 seismometer are out due to faulty circuit boards in the DAS. END **************************************************************************** DATA PROBLEM REPORT IDA1997:024 1997/11/24 IDA DCC Peter Davis IDA JTS II S** 1997,178,19:28:00 1997,178,19:28:00 Problem Description DEAD CHANNEL All channels from the STS-2 appear to be dead from this date. The problem is thought to reside with the sensor itself. A site visit is planned to correct the problem. END PROBLEM RESOLUTION REPORT IDA1997:024 2000/06/02 IDA Peter Davis Description of Problem Resolution RESOLUTION The problem was resolved by replacing the DSP board within the DAS. Data flow from the STS-2 resumed on 2000,091-17:36. END **************************************************************************** DATA PROBLEM REPORT IDA2006:013 2006/06/28 IDA DCC Erik Klimczak IDA PFO II WDI-00 2006,004,00:00:00 2006,027,00:00:00 Problem Description DEAD CHANNEL The WDI-00 channel was out during this period due to a faulty microbarometer. The channel was restored after an IDA engineer replaced the microbarometer. END **************************************************************************** DATA PROBLEM REPORT IDA1997:025 1997/12/03 IDA DCC Peter Davis IDA RAYN II BHN,BHE,LHN,LHE,VHN,VHE 1997,276,14:00:00 1997,276,14:00:00 Problem Description LOW FREQUENCY NOISE All channels from the horizontal components of the KS-54000 become noisy at long periods beginning at this time. The source of this noise is not yet understood. END **************************************************************************** DATA PROBLEM REPORT IDA2006:012 2006/06/28 IDA DCC Erik Klimczak IDA NNA II *** 2006,082,00:00:00 2006,097,00:00:00 Problem Description OTHER IDA station NNA was down from day 082 (Mar.22) to day 097 (Apr. 6) due to failure of the remote power supply. The problem was resolved when the station operator repaired the power supply. END **************************************************************************** DATA PROBLEM REPORT IDA1997:026 1997/12/04 IDA DCC Peter Davis IDA CMLA II *** 1997,302,02:46:00 1997,302,02:46:00 Problem Description DATA LOGGER PROBLEM The station suffered damage to several electronic components during severe storms which hit the island during that week. The extent of the damage is still being analyzed and repairs, planned. END PROBLEM RESOLUTION REPORT IDA1997:026 1998/04/28 IDA Peter Davis Description of Problem Resolution RESOLUTION The ARS, GPS clock, modem and main power supply were replaced on a site visit. The station resumed operation on 98,107-17:41. END **************************************************************************** DATA PROBLEM REPORT IDA2006:011 2006/06/28 IDA DCC Erik Klimczak NIL II *H*-00 2006,027,00:00:00 2006,146,00:00:00 Problem Description OTHER The configuration of horizontal KS-54000's broadband channels *HE-00 and *HN-00 was changed when the DAS at this station was replaced and data acquisition resumed on day 2006,027. This configuration change was not detected at first, which resulted in data for channel *HE-00 being distributed as *HN-00 and vice versa, until May 26, 2006. Therefore data requested from the DMC for these channels between January 27 and May 26, 2006 were swapped. Correctly mapped data were resubmitted to the DMC and the archive was rectified by June 20. Requests for data submitted after this date will be filled with properly de-multiplexed data. END **************************************************************************** DATA PROBLEM REPORT IDA1997:027 1997/12/18 IDA DCC Peter Davis IDA ERM II *** 1997,250,14:56:00 1997,250,14:56:00 Problem Description DATA LOGGER PROBLEM The station suffered lightning damage to several electronic components during a storm which occurred on Oct 8, 1997. Replacement parts are being shipped to the station. The date above (97,250-14:56) marks the last recorded data from the station. From that date to the storm, no data were recorded due to a faulty DAT drive. END PROBLEM RESOLUTION REPORT IDA1997:027 1998/04/28 IDA Peter Davis Description of Problem Resolution RESOLUTION The ARS and main power supply were repaired on a site visit. The station resumed operation on 98,097-02:42. END **************************************************************************** DATA PROBLEM REPORT IDA2006:018 2006/06/28 IDA DCC Erik Klimczak IDA WRAB II WDI-00 2005,349,00:00:00 2006,151,00:00:00 Problem Description DEAD CHANNEL The WDI-00 channel was out during this period due to a faulty microbarometer. The channel was restored after the station operator replaced the microbarometer. END **************************************************************************** DATA PROBLEM REPORT IDA1997:020 1997/10/22 IDA DCC Peter Davis IDA NRIL II *** 1997,273,10:30:00 1997,273,10:30:00 Problem Description INCORRECT TIME The US Coast Guard discontinued operation of its world-wide OMEGA navigation system on the above date. Because a number of IDA stations still use OMEGA-based clocks as their external timing standard, the cessation of the OMEGA signal creates a serious timing problem. An engineering solution has been devised which will require several weeks to implement. We will advise as the necessary auxilliary equipment is installed at each effected station. The stations effected are: AAK, ALE, ARU, BRVK, ESK, KIV, KURK, LVZ, NRIL, and OBN. END **************************************************************************** DATA PROBLEM REPORT IDA2006:017 2006/06/28 IDA DCC Erik Klimczak IDA SUR II WDO 2006,061,00:00:00 2006,061,00:00:00 Problem Description DEAD CHANNEL The WDO channel is out for reasons yet to be determined. END **************************************************************************** DATA PROBLEM REPORT IDA1997:021 1997/10/22 IDA DCC Peter Davis IDA OBN II *** 1997,273,10:30:00 1997,273,10:30:00 Problem Description INCORRECT TIME The US Coast Guard discontinued operation of its world-wide OMEGA navigation system on the above date. Because a number of IDA stations still use OMEGA-based clocks as their external timing standard, the cessation of the OMEGA signal creates a serious timing problem. An engineering solution has been devised which will require several weeks to implement. We will advise as the necessary auxilliary equipment is installed at each effected station. The stations effected are: AAK, ALE, ARU, BRVK, ESK, KIV, KURK, LVZ, NRIL, and OBN. END **************************************************************************** DATA PROBLEM REPORT IDA2006:016 2006/06/28 IDA DCC Erik Klimczak IDA SUR II BHE,LHE,VHE 2006,061,00:00:00 2006,061,00:00:00 Problem Description DATA LOGGER PROBLEM The East-West broadband channels from the STS-1 seismometer are out after the station operator removed the circuit board to replace the faulty circuit board for the vertical channels. END **************************************************************************** DATA PROBLEM REPORT IDA1997:022 1997/11/11 IDA DCC Peter Davis IDA NIL II BHZ,LHZ,VHZ 1997,216,09:15:00 1997,216,09:15:00 Problem Description LOW FREQUENCY NOISE Channels associated with the vertical sensor in the KS-54000 borehole package became noisy beginning on the above date and continuing intermittently to the present. The source of the problem is being analyzed but is not yet understood. This DPR will be updated as progress toward resolving the problem is made. END PROBLEM RESOLUTION REPORT IDA1997:022 2000/04/18 IDA Peter Davis Description of Problem Resolution SUPPLEMENT The intermittent problem noted in this DPR reaappeared on 98,069 and persists to the present. END **************************************************************************** DATA PROBLEM REPORT IDA2006:015 2006/06/28 IDA DCC Erik Klimczak IDA SUR II BHZ,LHZ,VHZ 2006,032,00:00:00 2006,061,00:00:00 Problem Description DATA LOGGER PROBLEM The vertical broadband channels from the STS-1 seismometer were out during this period due to a faulty circuit board in the DAS. The vertical channels were restored when the station operator swapped the circuit board with the circuit board from the East-West channel. END **************************************************************************** DATA PROBLEM REPORT IDA1997:023 1997/11/11 IDA DCC Peter Davis IDA MSVF II BHZ,LHZ,VHZ 1997,260,00:48:00 1997,260,00:48:00 Problem Description DATA LOGGER PROBLEM All channels from the KS-54000's vertical sensor appear to be dead due to a problem with the RT303 digitizer board responsible for processing these data streams. We are working with the station operator to correct the problem. END PROBLEM RESOLUTION REPORT IDA1997:023 1998/11/04 IDA Peter Davis Description of Problem Resolution COMMENT IDA engineers visited the site on Aug 31st-Sept 9th to repair the DAS and GPS clock, and also to analyze DAS-ARS communications problems. The CPU board in the ARS was changed which corrected the DAS-ARS communications problem. The RT303 board for the vertical sensor was replaced. Unfortunately, the problem with KS54000-Z data was traced to the seismometer cable or the instrument itself. Therefore repair was not possible, and the vertical channels remain non-seismic. END **************************************************************************** DATA PROBLEM REPORT ANSS2010:009 2010/03/11 ANSS DCC Leo Sandoval ANSS LPAZ GT *H* 2010,043,14:40:00 2010,050,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE S 2515 Data dropouts GT_LPAZ Excessive Data Gaps 2010,043,14:40 -> 050,00:00 END **************************************************************************** DATA PROBLEM REPORT ANSS2010:008 2010/03/11 ANSS DCC Leo Sandoval ANSS LBTB GT *H* 2010,043,14:40:00 2010,050,00:00:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE S 2515 Data dropouts GT_LBTB Excessive Data Gaps 2010,043,14:40 -> 050,00:00 END **************************************************************************** DATA PROBLEM REPORT ANSS2010:003 2010/03/08 ANSS DCC Leo Sandoval ANSS WMOK US *H* 2010,030,09:45:00 2010,062,18:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE S 2507 Station down. US_WMOK Station down due to storm damage Power lines all down in area due to ICE Storm NO Data 2010 030 -> 062, 18:00 END **************************************************************************** DATA PROBLEM REPORT ANSS2010:002 2010/03/08 ANSS DCC Leo Sandoval ANSS PKME US *H* 2009,001,00:00:00 2009,365,23:59:00 Problem Description NOISE US_PKME For 2009 Data Quality Bad 2009,001 -> 223,16:00 with Instrument problems, Most data at or near Stops\ 223 -> 365 Data Quality Good after Maint visit. Data gap backfilled 016 -> 218 08 March 2010 END **************************************************************************** DATA PROBLEM REPORT ANSS2010:001 2010/02/02 ANSS DCC Leo Sandoval ANSS CNNC US *H* 2010,001,00:00:00 2010,014,19:00:00 Problem Description OTHER SEED COMMENT REFERENCE S 2501 Data unusable. US_CNNC 2010,001,00:00 -> 014,19:00 No data unusable instrument on stops and comm problems Operational 014,19:00 END **************************************************************************** DATA PROBLEM REPORT ASL2007:081 2007/04/20 ASL DCC Valerie Peyton ASL TUC IU 00/*H* 2007,109,23:35:00 2007,109,03:37:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. All three components of the TUC STS1 are producing digitizer noise. Data are not useable. END **************************************************************************** DATA PROBLEM REPORT ANSS2010:007 2010/03/11 ANSS DCC Leo Sandoval ANSS DBIC GT *H* 2010,043,14:40:00 2010,050,00:00:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE S 2515 Data dropouts GT_DBIC Excessive Data Gaps 2010,043,14:40 -> 050,00:00 END **************************************************************************** DATA PROBLEM REPORT ASL2007:082 2007/04/20 ASL DCC Valerie Peyton ASL SFJD IU 10/*H* 2007,109,18:50:00 2007,109,03:37:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The SFJD STS2 is producing digitizer noise. Data are not useable. END **************************************************************************** DATA PROBLEM REPORT ANSS2010:006 2010/03/11 ANSS DCC Leo Sandoval ANSS CPUP GT *H* 2010,043,14:40:00 2010,050,00:00:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE S 2515 Data dropouts GT_CPUP Excessive Data gaps 2010,043,14:00 -> 050,00:00 END **************************************************************************** DATA PROBLEM REPORT ANSS2010:005 2010/03/11 ANSS DCC Leo Sandoval ANSS BOSA GT *H* 2010,043,14:40:00 2010,050,00:00:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE S 2515 Data dropouts GT_BOSA Excessive Data gap 2010, 023,14:40 -> 050,00:00 END **************************************************************************** DATA PROBLEM REPORT ASL2007:080 2007/04/18 ASL DCC Valerie Peyton ASL SJG IU 00/*HN 2007,108,07:16:00 2007,109,03:37:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The N component of the STS1 at SJG is down. Data are not useable. END **************************************************************************** DATA PROBLEM REPORT ANSS2010:004 2010/03/08 ANSS DCC Leo Sandoval ANSS BLA US *HE 2009,162,00:00:00 2009,162,00:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE S 2508 Data intermittant. US_BLA Problem with *HE E/W First reported 2009 June 11 (162) Problem channel resoved itself (197) Instrument replaced Aug 17 (229) Problem Returned Sept 07 (250) Test done 2010,034 , conclusion Bad Q330 replacement sent Awaiting installation as of 08 March. THis channel has been intermittent since 2009, 162 -> 2010, ??? END PROBLEM RESOLUTION REPORT ANSS2010:004 2010/11/29 ANSS DCC Leo Sandoval Description of Problem Resolution RESOLUTION US_BLA Instrument replaced 2010,287,19:40 14th October 2010 to resolve E/W channel problems Station operational END **************************************************************************** DATA PROBLEM REPORT ASL2007:085 2007/04/24 ASL DCC Valerie Peyton ASL QSPA IU 20/*H* 2007,113,19:08:00 2007,113,16:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The QSPA STS2 masses have fallen against their stops. At first, large events are visible. After that, data are not useable. END **************************************************************************** DATA PROBLEM REPORT ASL2007:086 2007/05/23 ASL DCC Tyler Stormton ASL SDV IU 10/* 2007,142,05:10:00 2007,113,16:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. Instrument masses are pegged. Data are unuseable. END **************************************************************************** DATA PROBLEM REPORT IDA2006:009 2006/06/28 IDA DCC Erik Klimczak IDA MSEY II BHZ,LHZ,VHZ 2006,056,00:00:00 2006,056,00:00:00 Problem Description DEAD CHANNEL The vertical channels from the KS-54000 seismometer are out due to a faulty RT303 board in the DAS. END PROBLEM RESOLUTION REPORT IDA2006:009 2006/10/05 IDA Erik Klimczak Description of Problem Resolution RESOLUTION The vertical channels from the KS-54000 seismometer were restored after the station operator switched the circuit board from the North-South channel's to the vertical channel's slot in the DAS. **************************************************************************** DATA PROBLEM REPORT IDA2006:010 2006/06/28 IDA DCC Erik Klimczak IDA MSEY II *** 2006,076 2006,088 Problem Description OTHER IDA station MSEY was down during this period due to problems with the DAS. The problem was resolved after the station operator power cycled the DAS. END **************************************************************************** DATA PROBLEM REPORT ASL2007:083 2007/04/23 ASL DCC Valerie Peyton ASL RAR IU 10/*HN 2007,112,05:01:00 2007,113,16:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The N component of the RAR CMG3-T is pegged. Data are not useable. END **************************************************************************** DATA PROBLEM REPORT IDA2006:008 2006/06/28 IDA DCC Erik Klimczak IDA MBAR II *** 2006,030,00:00:00 2006,035,00:00:00 Problem Description DATA LOGGER PROBLEM IDA station MBAR was down due to a faulty circuit board in the DAS. The problem was resolved after the station operator removed the problematic RT303 board. END **************************************************************************** DATA PROBLEM REPORT ASL2007:084 2007/04/23 ASL DCC Valerie Peyton ASL HKT IU 00/*HE 2007,110,00:36:00 2007,113,16:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The HKT STS1 E component has fallen against one of its stops. At first large events are visible. After a while, data are not useable at all. END **************************************************************************** DATA PROBLEM REPORT ASL2007:089 2007/05/30 ASL DCC Tyler Stormton ASL MSKU IU 10/* 2007,137,15:44:00 2007,113,16:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. Instrument masses are pegged. END **************************************************************************** DATA PROBLEM REPORT ANSS2010:010 2010/03/11 ANSS DCC Leo Sandoval ANSS PLCA GT *H* 2010,043,14:40:00 2010,050,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE S 2515 Data dropouts GT_PLCA Excessive Data gaps 2010,043,14:40 -> 050,00:00 END **************************************************************************** DATA PROBLEM REPORT ASL2007:087 2007/05/23 ASL DCC Tyler Stormton ASL ANMO IU 10/* 2007,139,04:01:00 2007,113,16:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. Instrument masses are pegged. Data are unuseable. END **************************************************************************** DATA PROBLEM REPORT ASL2007:088 2007/05/30 ASL DCC Tyler Stormton ASL LVC IU 10/*HE 2007,145,17:48:00 2007,113,16:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. Instrument mass is on a stop. END **************************************************************************** DATA PROBLEM REPORT IDA2006:003 2006/06/28 IDA DCC Erik Klimczak IDA ERM II *** 2006,012,00:00:00 2006,022,00:00:00 Problem Description OTHER IDA station ERM was down during this period due to problems with telemetry to the station. Data acquisition resumed after the station operator rebooted the router. END **************************************************************************** DATA PROBLEM REPORT IDA2006:002 2006/06/28 IDA DCC Erik Klimczak IDA ASCN II BHZ-10 2006,098,00:00:00 2006,139,00:00:00 Problem Description DEAD CHANNEL The vertical channels for the CMG3-T seismometer were out during this period. The vertical channels were restored when the station operator recentered the masses for the CMG3-T seismometer. END **************************************************************************** DATA PROBLEM REPORT IDA2006:001 2006/06/28 IDA DCC Erik Klimczak IDA AAK II *** 2006,076,00:00:00 2006,093,00:00:00 Problem Description OTHER IDA station AAK was down from day 076 (Mar. 16) to day 093 (Apr. 3) due to a power outage at the station caused by the local electric company. END **************************************************************************** DATA PROBLEM REPORT IDA2006:007 2006/06/28 IDA DCC Erik Klimczak IDA KWAJ II *** 2006,080,00:00:00 2006,080,00:00:00 Problem Description DATA LOGGER PROBLEM IDA station KWAJ is down due to communication problems between the ISP and the DAS. END PROBLEM RESOLUTION REPORT IDA2006:007 2006/09/08 IDA Erik Klimczak Description of Problem Resolution RESOLUTION IDA station KWAJ came back up about day 223 after an IDA engineer visited the site and repaired the station uplink and power converter, and replaced circuit boards in the DAS. The STS-1 sensor is disconnected for testing and repair. END **************************************************************************** DATA PROBLEM REPORT IDA2006:006 2006/06/28 IDA DCC Erik Klimczak IDA KWAJ II BHZ,LHZ,VHZ 2006,059,00:00:00 2006,059,00:00:00 Problem Description DEAD CHANNEL The vertical channels from the STS-1 seismometer are out due to problems with the seismometer that are yet to be determined. END **************************************************************************** DATA PROBLEM REPORT IDA2006:005 2006/06/28 IDA DCC Erik Klimczak IDA ERM II *** 2006,116,00:00:00 2006,116,00:00:00 Problem Description OTHER The East-West channels from the STS-1 seismometer have high background noise levels since data acquisition resumed on day 116 following an outage of uncertain origin. END PROBLEM RESOLUTION REPORT IDA2006:005 2012/12/07 IDA Erik Klimczak Description of Problem Resolution RESOLUTION The East-West channels from the STS-1 seismometer were restored after IDA engineers replaced the STS-1 seismometer and upgraded the station to a Quanterra Q330HR system. END **************************************************************************** DATA PROBLEM REPORT IDA2006:004 2006/06/28 IDA DCC Erik Klimczak IDA ERM II *** 2006,095,00:00:00 2006,116,00:00:00 Problem Description DATA LOGGER PROBLEM IDA station ERM was down during this period due to communication problems between the ISP and the DAS. Data acquisition resumed after the station operator power cycled the DAS. END **************************************************************************** DATA PROBLEM REPORT IDA2006:042 2006/10/17 IDA DCC Erik Klimczak IDA ARU II BB*-00 2006,266,00:00:00 2006,269,00:00:00 Problem Description OTHER The broadband channels from the STS-1 sensors had excessive noise during this time period. Data quality improved after the station operator repaired an electrical fault in the system wiring. END **************************************************************************** DATA PROBLEM REPORT IDA2006:041 2006/10/13 IDA DCC Erik Klimczak IDA PFO II BB*-00 2006,270,00:00:00 2006,285,00:00:00 Problem Description OTHER The broadband channels from the STS-1 sensor had excessive noise above 1 Hz during this time period due to faulty grounding of station equipment. The problem was resolved after an IDA engineer visited the station and reconfigured the Main power supply. END **************************************************************************** DATA PROBLEM REPORT IDA2006:040 2006/10/13 IDA DCC Erik Klimczak IDA JTS II *** 2006,279,00:00:00 2006,279,00:00:00 Problem Description OTHER IDA station JTS is down due to problems with data acquisition that are yet to be determined. Instructions for the station operator to inspect the station's power supplies, power cycle the DAS, and check the fuses and circuit boards in the DAS have been sent. END PROBLEM RESOLUTION REPORT IDA2006:040 2006/11/14 IDA Erik Klimczak Description of Problem Resolution RESOLUTION Data acquisition at IDA station JTS was restored as of about day 312-19:45 after the station operator visited the station and reconfigured connections to the DAS, changed a switch for the power converter, checked fuses, and cycled power to the DAS. END **************************************************************************** DATA PROBLEM REPORT ASL2007:070 2007/03/27 ASL DCC Valerie Peyton ASL DAV IU */* 2007,083,05:09:00 2007,086,03:41:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. A CTBTO engineer is on site at DAV for station maintenance. Expect variable data quality and availability, as well as calibrations and other tests. END **************************************************************************** DATA PROBLEM REPORT ASL2007:071 2007/03/28 ASL DCC Valerie Peyton ASL TARA IU */* 2007,086,00:00:00 2007,088,22:01:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. An ASL field team is at TARA installing the station. Expect variable data quality and availability, as well as calibrations and other tests. END **************************************************************************** DATA PROBLEM REPORT ASL2007:074 2007/04/12 ASL DCC Valerie Peyton ASL AFI IU 00/LDO 2006,146,00:00:00 2007,093,13:19:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE C 4215 Time uncertain; error less than 1 second. The manner in which Paroscientific microbarograph data are sampled introduces known, uncorrectable timing errors. Because the Paroscientific microbarograph is a digital instrument, it cannot be recorded on a regular analog-to-digital digitizer. Instead, microbarograph data from a Paroscientific microbarograph are collected through a serial port, and not obtained via a proper digitizer. Once a second software "requests" a data point from the microbarograph. The time stamp given each data point is the time at which the request for data point was made. There is no way to determine precisely when each data point was sampled. The timing error introduced by this sampling method usually is less than 1 second. In addition, gaps of 3 samples occur at irregular intervals, and are caused when the serial port does not respond in a timely manner. At that point, the software re-initializes the instrument. The re-initialization process produces 3-sample gaps. END **************************************************************************** DATA PROBLEM REPORT ASL2007:075 2007/04/12 ASL DCC Valerie Peyton ASL CHTO IU 00/LDO 2003,031,00:00:00 2007,093,13:19:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE C 4215 Time uncertain; error less than 1 second. The manner in which Paroscientific microbarograph data are sampled introduces known, uncorrectable timing errors. Because the Paroscientific microbarograph is a digital instrument, it cannot be recorded on a regular analog-to-digital digitizer. Instead, microbarograph data from a Paroscientific microbarograph are collected through a serial port, and not obtained via a proper digitizer. Once a second software "requests" a data point from the microbarograph. The time stamp given each data point is the time at which the request for data point was made. There is no way to determine precisely when each data point was sampled. The timing error introduced by this sampling method usually is less than 1 second. In addition, gaps of 3 samples occur at irregular intervals, and are caused when the serial port does not respond in a timely manner. At that point, the software re-initializes the instrument. The re-initialization process produces 3-sample gaps. END **************************************************************************** DATA PROBLEM REPORT ASL2007:072 2007/04/02 ASL DCC Valerie Peyton ASL QSPA IU 20/*H* 2007,091,18:09:00 2007,093,13:19:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The QSPA STS2 masses have fallen against their stops. At first, large events are visible. After that, data are not useable. END **************************************************************************** DATA PROBLEM REPORT ASL2007:073 2007/04/11 ASL DCC Valerie Peyton ASL TARA IU 00/LDO 2007,073,00:00:00 2007,093,13:19:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE C 4215 Time uncertain; error less than 1 second. The manner in which Paroscientific microbarograph data are sampled introduces known, uncorrectable timing errors. Because the Paroscientific microbarograph is a digital instrument, it cannot be recorded on a regular analog-to-digital digitizer. Instead, microbarograph data from a Paroscientific microbarograph are collected through a serial port, and not obtained via a proper digitizer. Once a second software "requests" a data point from the microbarograph. The time stamp given each data point is the time at which the request for data point was made. There is no way to determine precisely when each data point was sampled. The timing error introduced by this sampling method usually is less than 1 second. In addition, gaps of 3 samples occur at irregular intervals, and are caused when the serial port does not respond in a timely manner. At that point, the software re-initializes the instrument. The re-initialization process produces 3-sample gaps. END **************************************************************************** DATA PROBLEM REPORT IDC1996:001 1996/01/02 OTHER staqc IDC station QC ASCN II ? 1995,363,00:01:00 1995,363,00:01:00 Problem Description OTHER Data requests from the IDA AutoDRM were not successful from 29 Dec 95 through 01 Jan 96. This was observed for ASCN, BORG, and RPN. Was/is there an AutoDRM problem? END PROBLEM RESOLUTION REPORT IDC1996:001 1996/01/08 IDA Peter Davis Description of Problem Resolution RESOLUTION The IDADRM's failure to respond to any data requests during the period 1995363 -- 1996001 was due to a transient problem related to the configuration of the node JTS. This problem has been corrected, and IDADRM is again processing data requests efficiently. We regret any inconvenience this may have caused. END **************************************************************************** DATA PROBLEM REPORT ASL2007:078 2007/04/12 ASL DCC Valerie Peyton ASL ANMO IU 10/LDI 1999,313,19:00:00 2000,229,14:00:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE C 4215 Time uncertain; error less than 1 second. The manner in which Paroscientific microbarograph data are sampled introduces known, uncorrectable timing errors. Because the Paroscientific microbarograph is a digital instrument, it cannot be recorded on a regular analog-to-digital digitizer. Instead, microbarograph data from a Paroscientific microbarograph are collected through a serial port, and not obtained via a proper digitizer. Once a second software "requests" a data point from the microbarograph. The time stamp given each data point is the time at which the request for data point was made. There is no way to determine precisely when each data point was sampled. The timing error introduced by this sampling method usually is less than 1 second. In addition, gaps of 3 or more samples occur at irregular intervals, and are caused when the serial port does not respond in a timely manner. At that point, the software re-initializes the instrument. The re-initialization process produces multi-sample gaps. END **************************************************************************** DATA PROBLEM REPORT IDA1997:006 1997/04/22 IDA DCC Peter Davis IDA JTS II BH*,LH*,VH* 1997,068,00:00:00 1997,068,00:00:00 Problem Description INVALID RESPONSE During a recent site maintenance visit to this station, problems were encountered in resetting and calibrating the STS-1 broadband sensors. The response we are reporting for this epoch is far from nominal and should be treated as accurate to no better than 5% at best, a figure much less precise than is typical for an IRIS/IDA station. END **************************************************************************** DATA PROBLEM REPORT ASL2007:079 2007/04/12 ASL DCC Valerie Peyton ASL ANMO IU 10/LDO 2000,229,14:00:00 2000,293,16:00:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE C 4215 Time uncertain; error less than 1 second. The manner in which Paroscientific microbarograph data are sampled introduces known, uncorrectable timing errors. Because the Paroscientific microbarograph is a digital instrument, it cannot be recorded on a regular analog-to-digital digitizer. Instead, microbarograph data from a Paroscientific microbarograph are collected through a serial port, and not obtained via a proper digitizer. Once a second software "requests" a data point from the microbarograph. The time stamp given each data point is the time at which the request for data point was made. There is no way to determine precisely when each data point was sampled. The timing error introduced by this sampling method usually is less than 1 second. In addition, gaps of 3 or more samples occur at irregular intervals, and are caused when the serial port does not respond in a timely manner. At that point, the software re-initializes the instrument. The re-initialization process produces multi-sample gaps. END **************************************************************************** DATA PROBLEM REPORT IDA1997:007 1997/06/13 IDA DCC Peter Davis IDA HOPE II BHZ,LHZ,VHZ 1997,127,11:18:00 1997,127,11:18:00 Problem Description DEAD CHANNEL Following a recent power failure at the station, the mass of the STS-1V did not return to an equilibrium position, and the data from all broadband vertical channels are non-seismic in character. The sensor will remain in this condition until it can be adjusted or replaced. We are working with station personnel to correct the problem. END PROBLEM RESOLUTION REPORT IDA1997:007 1997/10/16 IDA Peter Davis Description of Problem Resolution COMMENT The STS-1 EW sensor appears to be in a similar clipped condition as the vertical beginning on 97,183 and continuing up to the present. We are working with the operator to correct the condition. ****************************************************************** DATA PROBLEM REPORT ASL1997:041 1997/06/18 ASL DCC Tyler Storm ASL CASY IU BHZ, LHZ, VHZ, UHZ 1996,050,00:00:00 Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE C 4500 Channel has high noise background. Vertical STS-1 data contain low-frequency noise. END **************************************************************************** DATA PROBLEM REPORT ASL2007:076 2007/04/12 ASL DCC Valerie Peyton ASL FUNA IU 00/LDO 2006,155,00:00:00 2007,093,13:19:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE C 4215 Time uncertain; error less than 1 second. The manner in which Paroscientific microbarograph data are sampled introduces known, uncorrectable timing errors. Because the Paroscientific microbarograph is a digital instrument, it cannot be recorded on a regular analog-to-digital digitizer. Instead, microbarograph data from a Paroscientific microbarograph are collected through a serial port, and not obtained via a proper digitizer. Once a second software "requests" a data point from the microbarograph. The time stamp given each data point is the time at which the request for data point was made. There is no way to determine precisely when each data point was sampled. The timing error introduced by this sampling method usually is less than 1 second. In addition, gaps of 3 samples occur at irregular intervals, and are caused when the serial port does not respond in a timely manner. At that point, the software re-initializes the instrument. The re-initialization process produces 3-sample gaps. END **************************************************************************** DATA PROBLEM REPORT IDA1997:008 1997/07/16 IDA DCC Peter Davis IDA FFC II BHZ,LHZ,VHZ 1997,178,09:00:00 1997,190,21:25:00 Problem Description LOW FREQUENCY NOISE Channels originating from the vertical STS-1 sensor were noisy during this period because vacuum was lost under the bell jar covering the sensor. Vacuum was restored on 1997190, and the noise levels returned to normal at that time. END **************************************************************************** DATA PROBLEM REPORT ASL2007:077 2007/04/12 ASL DCC Valerie Peyton ASL QSPA IU 00/LDO 2006,018,00:00:00 2000,293,16:00:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE C 4215 Time uncertain; error less than 1 second. The manner in which Paroscientific microbarograph data are sampled introduces known, uncorrectable timing errors. Because the Paroscientific microbarograph is a digital instrument, it cannot be recorded on a regular analog-to-digital digitizer. Instead, microbarograph data from a Paroscientific microbarograph are collected through a serial port, and not obtained via a proper digitizer. Once a second software "requests" a data point from the microbarograph. The time stamp given each data point is the time at which the request for data point was made. There is no way to determine precisely when each data point was sampled. The timing error introduced by this sampling method usually is less than 1 second. In addition, gaps of 3 samples occur at irregular intervals, and are caused when the serial port does not respond in a timely manner. At that point, the software re-initializes the instrument. The re-initialization process produces 3-sample gaps. END **************************************************************************** DATA PROBLEM REPORT IDA1997:009 1997/10/16 IDA DCC Peter Davis IDA TLY II *** 1997,132,00:32:00 1997,245,12:24:00 Problem Description DATA LOGGER PROBLEM The DAT tape drive at TLY failed on 97,132 and was replaced on 97,245. The external clock (IDA1996:006) is still not functioning correctly. END **************************************************************************** DATA PROBLEM REPORT IDA2006:036 2006/10/05 IDA DCC Erik Klimczak IDA MSEY II BBE-00,BBN-00 2006,270,00:00:00 2006,270,00:00:00 Problem Description DEAD CHANNEL The North-South and East-West channels for the KS-54000 seismometer are nonseismic due to faulty circuit boards in the DAS. The board originally in the North-South slot was used to restore the vertical channels and the remaining two boards are faulty. END **************************************************************************** DATA PROBLEM REPORT IDA1997:002 1997/02/11 IDA DCC Peter Davis IDA NRIL II BHE,BLE,LLE,VHE 1997,006,09:40:00 1997,006,09:40:00 Problem Description Problem Description DEAD CHANNEL The station operator reports the mass is no longer within an operational range due to an unspecified problem with the vault. Plans are progressing for renovating that part of the vault where the sensors are located. The STS-1 EW sensor was saturated again from 97,138 - 97,157-10:00 for the same reasons. END **************************************************************************** DATA PROBLEM REPORT IDA2006:035 2006/10/05 IDA DCC Erik Klimczak IDA JTS II *** 2006,257,00:00:00 2006,265,00:00:00 Problem Description OTHER IDA station JTS was down during this time period due to communication problems between the ISP and the digitizer. The station came back up after the station operator power cycled the DAS. END **************************************************************************** DATA PROBLEM REPORT IDA1997:003 1997/03/25 IDA DCC Peter Davis IDA WRAB II * 1997,045,07:53:00 1997,069,00:00:00 Problem Description DATA LOGGER PROBLEM Data acquisition stopped as above when a thunderstorm severely damaged the generator at WRAB. The generator failure caused a large over-voltage spike to develope which in turn damaged instrumentation throughout the array including some components of the IRIS/IDA GSN data logger. Recording of data from that time until a repair visit which ended 1997069 was intermittent. The repair visit had been scheduled previously to address the problem described in DPR IDA1996:010. END **************************************************************************** DATA PROBLEM REPORT IDA2006:034 2006/10/05 IDA DCC Erik Klimczak IDA COCO II BBZ-00 2006,259,00:00:00 2006,276,00:00:00 Problem Description DEAD CHANNEL The vertical channels from the KS-54000 seismometer were intermittently non-seismic from day 259 to 268 and then from day 275 to 276. The channels were restored after a DAS reboot. END **************************************************************************** DATA PROBLEM REPORT IDA1997:004 1997/03/25 IDA DCC Peter Davis IDA MSEY II * 1996,351,20:16:00 1996,351,20:16:00 Problem Description DATA LOGGER PROBLEM Data acquisition from MSEY has been intermittent since the above date due to a failure of one or more circuit boards within the data logger. Replacement parts are being tested and will be shipped to the station shortly. END PROBLEM RESOLUTION REPORT IDA1997:004 1997/10/16 IDA Peter Davis Description of Problem Resolution RESOLUTION The data logger problem was resolved by replacing a fuse in the main power supply, both the RS232 to RS422 level shifting IC and the corresponding Schmitt-Trigger Inverter chips on the BPIA board, and two resistors on the DAS SIA board. Data collection resumed on 97,241-06:25. END **************************************************************************** DATA PROBLEM REPORT IDA2006:033 2006/10/05 IDA DCC Erik Klimczak IDA MBAR II LN*,EN* 2006,236,00:00:00 2006,236,00:00:00 Problem Description DEAD CHANNEL Data quality for all channels from the FBA-23 sensor is poor for reasons yet to be determined. END **************************************************************************** DATA PROBLEM REPORT IDA1997:005 1997/03/25 IDA DCC Peter Davis IDA CMLA II * 1997,071,15:50:00 1997,073,10:00:00 Problem Description DATA LOGGER PROBLEM Over this two day period, preventative maintenance was performed on the RT303 circuit boards (the HP A2D boards for the broadband data channels) of the IRIS/IDA GSN data logger. During the course of analysis and installation, one or more boards were swapped. At the conclusion of maintenance, however, only the EW board was replaced. END **************************************************************************** DATA PROBLEM REPORT IDA2006:039 2006/10/13 IDA DCC Erik Klimczak IDA FFC II *** 2006,273,00:00:00 2006,285,00:00:00 Problem Description OTHER IDA station FFC was down during this time period due to problems with the DAS and telemetry. Data acquisition was restored after the link to the station was restored and the DAS was rebooted. END **************************************************************************** DATA PROBLEM REPORT IDA2006:038 2006/10/13 IDA DCC Erik Klimczak IDA CMLA II *** 2006,279,00:00:00 2006,279,00:00:00 Problem Description OTHER IDA station CMLA is down following a lightning storm that knocked out power to the wellhead. IDA engineering is working with the station operator to trace the source of the problem. END **************************************************************************** DATA PROBLEM REPORT IDA2006:037 2006/10/05 IDA DCC Erik Klimczak IDA PFO II *** 2006,277,00:00:00 2006,278,00:00:00 Problem Description OTHER IDA station PFO was down during this time period due to problems with the power supply to the ISP. The station came back up after an IDA engineer visited the station and connected the equipment directly to AC outlets in the recording room. END **************************************************************************** DATA PROBLEM REPORT IDA1997:001 1997/01/16 IDA DCC Peter Davis IDA MSVF II *** 1996,225,23:23:00 1996,225,23:23:00 Problem Description OTHER A power disruption on 96,225 caused the main data logger power supply to fail. A replacement power supply and DAT drive were shipped to the station and installed on 96.326. Data acquisition resumed on 96,326-01:21. However, the data streams from all three components appear to be non-seismic. The precise reason for this has not yet been determined. A site repair visit is now being planned. END PROBLEM RESOLUTION REPORT IDA1997:001 1997/10/16 IDA Peter Davis Description of Problem Resolution RESOLUTION The external clock was replaced on 97,262 and the timing of data is now up to GSN standard. END **************************************************************************** DATA PROBLEM REPORT IDA2006:032 2006/09/12 IDA DCC Erik Klimczak IDA MBAR II BH2-10 2006,029,00:00:00 2006,029,00:00:00 Problem Description DEAD CHANNEL Data quality for the CMG3-T sensor's East-West channel is poor due to a faulty sensor. END **************************************************************************** DATA PROBLEM REPORT IDA2006:031 2006/09/12 IDA DCC Erik Klimczak IDA EFI II BHE-10 2006,219,00:00:00 2006,219,00:00:00 Problem Description DEAD CHANNEL The East-West short period channels for the CMG3-T seismometer are non-seismic for reasons yet to be determined. END PROBLEM RESOLUTION REPORT IDA2006:031 2006/10/13 IDA Erik Klimczak Description of Problem Resolution RESOLUTION The East-West channels for the CMG-3T seismometer at EFI were restored at about day 256-18:50 after the station operator recentered the masses for CMG-3T seismometer. END **************************************************************************** DATA PROBLEM REPORT IDA2006:030 2006/09/08 IDA DCC Erik Klimczak IDA SUR II *** 2006,164,00:00:00 2006,166,00:00:00 Problem Description OTHER IDA station SUR was down during this period due to communication problems between the DAS and the ISP. The station operator reconnected the link between the DAS and the ISP and data acquisition resumed. END **************************************************************************** DATA PROBLEM REPORT ASL2007:060 2007/03/12 ASL DCC Valerie Peyton ASL TIXI IU 10/EH* 10/SH* 2002,275,21:27:00 2002,281,03:45:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4625 Invalid instrument response. The TIXI station operator was working on the GS-13 amplifier settings during this time. Instrument sensitivity is variable and unreliable. END **************************************************************************** DATA PROBLEM REPORT ASL2007:063 2007/03/20 ASL DCC Valerie Peyton ASL FURI IU 00/*H* 2007,071,04:44:00 2007,078,08:03:00 Problem Description SPIKES SEED COMMENT REFERENCE C 4525 Channel has spiking and other data glitches. All three components of the FURI STS1 are afflicted with a terrible spiking problem. The spikes are so frequent that events are essentially not visible. END **************************************************************************** DATA PROBLEM REPORT ASL2007:064 2007/03/21 ASL DCC Valerie Peyton ASL TRQA IU 10/*H2 2007,079,02:03:00 2007,086,18:23:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The 2 component of the TRQA CMG3T-B is pegged. At first, large events may be visible; but beyond that, data are not useable. END **************************************************************************** DATA PROBLEM REPORT ASL2007:061 2007/03/19 ASL DCC Valerie Peyton ASL QSPA IU 20/*H* 2007,074,00:32:00 2007,075,14:53:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. All three components of the QSPA STS2 have fallen against their stops. Data are not useable. END **************************************************************************** DATA PROBLEM REPORT ASL2007:062 2007/03/19 ASL DCC Valerie Peyton ASL TIXI IU 00/*HZ 2007,077,19:13:00 2007,078,08:03:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The TIXI STS1 Z seismometer mass fell against its stop. Data are not useable. END **************************************************************************** DATA PROBLEM REPORT ASL2007:067 2007/03/27 ASL DCC Valerie Peyton ASL KEV IU 10/*H* 2007,080,18:35:00 2007,085,10:07:00 Problem Description OTHER SEED COMMENT REFERENCE C 1836 Instrument maintenance. Tests may be in progress. The KEV station operator was working on their digitzer which records a separate data stream from the CMG3-T. Expect variable data quality and availability, as well as tests and calibrations. END **************************************************************************** DATA PROBLEM REPORT IDA1997:017 1997/10/22 IDA DCC Peter Davis IDA KIV II *** 1997,273,10:30:00 1997,273,10:30:00 Problem Description INCORRECT TIME The US Coast Guard discontinued operation of its world-wide OMEGA navigation system on the above date. Because a number of IDA stations still use OMEGA-based clocks as their external timing standard, the cessation of the OMEGA signal creates a serious timing problem. An engineering solution has been devised which will require several weeks to implement. We will advise as the necessary auxilliary equipment is installed at each effected station. The stations effected are: AAK, ALE, ARU, BRVK, ESK, KIV, KURK, LVZ, NRIL, and OBN. END **************************************************************************** DATA PROBLEM REPORT ASL2007:068 2007/03/27 ASL DCC Valerie Peyton ASL SNZO IU 10/*HN 2007,086,09:11:00 2007,087,01:13:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The N component of the SNZO CMG3-T has fallen against its stop. Data are not useable. END **************************************************************************** DATA PROBLEM REPORT IDA1997:018 1997/10/22 IDA DCC Peter Davis IDA KURK II *** 1997,273,10:30:00 1997,273,10:30:00 Problem Description INCORRECT TIME The US Coast Guard discontinued operation of its world-wide OMEGA navigation system on the above date. Because a number of IDA stations still use OMEGA-based clocks as their external timing standard, the cessation of the OMEGA signal creates a serious timing problem. An engineering solution has been devised which will require several weeks to implement. We will advise as the necessary auxilliary equipment is installed at each effected station. The stations effected are: AAK, ALE, ARU, BRVK, ESK, KIV, KURK, LVZ, NRIL, and OBN. END **************************************************************************** DATA PROBLEM REPORT ASL2007:065 2007/03/22 ASL DCC Valerie Peyton ASL RAO IU 00/*HZ 2007,067,23:48:00 2007,100,01:25:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The RAO STS1 Z component has fallen against its stop. At first, large events may be visible. After that, data are not useable. END **************************************************************************** DATA PROBLEM REPORT IDA1997:019 1997/10/22 IDA DCC Peter Davis IDA LVZ II *** 1997,273,10:30:00 1997,273,10:30:00 Problem Description INCORRECT TIME The US Coast Guard discontinued operation of its world-wide OMEGA navigation system on the above date. Because a number of IDA stations still use OMEGA-based clocks as their external timing standard, the cessation of the OMEGA signal creates a serious timing problem. An engineering solution has been devised which will require several weeks to implement. We will advise as the necessary auxilliary equipment is installed at each effected station. The stations effected are: AAK, ALE, ARU, BRVK, ESK, KIV, KURK, LVZ, NRIL, and OBN. END **************************************************************************** DATA PROBLEM REPORT ASL2007:066 2007/03/27 ASL DCC Valerie Peyton ASL SJG IU 00/*H* 2007,085,16:52:00 2007,092,12:57:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. All three components of the SJG STS1 are producing raw digitizer noise. Data are not useable. END **************************************************************************** DATA PROBLEM REPORT IDA2006:025 2006/09/08 IDA DCC Erik Klimczak IDA KAPI II BHZ,LHZ,VHZ 2006,210,00:00:00 2006,226,00:00:00 Problem Description DEAD CHANNEL The vertical channels for the KS-54000 seismometer were out during this period due to a faulty RT-303 board in the DAS. The vertical channels were restored when the station operator switched the board from the BBN channel to the BBZ channel location in the DAS. END **************************************************************************** DATA PROBLEM REPORT IDA1997:013 1997/10/22 IDA DCC Peter Davis IDA ALE II *** 1997,273,10:30:00 1997,273,10:30:00 Problem Description INCORRECT TIME The US Coast Guard discontinued operation of its world-wide OMEGA navigation system on the above date. Because a number of IDA stations still use OMEGA-based clocks as their external timing standard, the cessation of the OMEGA signal creates a serious timing problem. An engineering solution has been devised which will require several weeks to implement. We will advise as the necessary auxilliary equipment is installed at each effected station. The stations effected are: AAK, ALE, ARU, BRVK, ESK, KIV, KURK, LVZ, NRIL, and OBN. END **************************************************************************** DATA PROBLEM REPORT IDA2006:024 2006/09/08 IDA DCC Erik Klimczak IDA JTS II BHE,LHE,VHE 2006,228,00:00:00 2006,228,00:00:00 Problem Description DEAD CHANNEL The East-West channels for the STS-1 sensor are out after the station operator removed the RT-303 board to replace the faulty circuit board for the vertical channels. END **************************************************************************** DATA PROBLEM REPORT IDA1997:014 1997/10/22 IDA DCC Peter Davis IDA ARU II *** 1997,273,10:30:00 1997,273,10:30:00 Problem Description INCORRECT TIME The US Coast Guard discontinued operation of its world-wide OMEGA navigation system on the above date. Because a number of IDA stations still use OMEGA-based clocks as their external timing standard, the cessation of the OMEGA signal creates a serious timing problem. An engineering solution has been devised which will require several weeks to implement. We will advise as the necessary auxilliary equipment is installed at each effected station. The stations effected are: AAK, ALE, ARU, BRVK, ESK, KIV, KURK, LVZ, NRIL, and OBN. END **************************************************************************** DATA PROBLEM REPORT IDA2006:023 2006/09/08 IDA DCC Erik Klimczak IDA JTS II BHZ,LHZ,VHZ 2006,219,00:00:00 2006,228,00:00:00 Problem Description DEAD CHANNEL The vertical channels for the STS-1 sensor were out during this period due to a faulty RT-303 board in the DAS. The vertical channels were restored when the station operator switched the board from the BBE channel to the BBZ channel location in the DAS. END **************************************************************************** DATA PROBLEM REPORT ASL2007:069 2007/03/27 ASL DCC Valerie Peyton ASL GUMO IU 10/*HN 2007,069,22:31:00 2007,069,22:52:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The N component of the GUMO CMG3-T was forced to its stops by a local event. Data are not useable. END **************************************************************************** DATA PROBLEM REPORT IDA1997:015 1997/10/22 IDA DCC Peter Davis IDA BRVK II *** 1997,273,10:30:00 1997,273,10:30:00 Problem Description INCORRECT TIME The US Coast Guard discontinued operation of its world-wide OMEGA navigation system on the above date. Because a number of IDA stations still use OMEGA-based clocks as their external timing standard, the cessation of the OMEGA signal creates a serious timing problem. An engineering solution has been devised which will require several weeks to implement. We will advise as the necessary auxilliary equipment is installed at each effected station. The stations effected are: AAK, ALE, ARU, BRVK, ESK, KIV, KURK, LVZ, NRIL, and OBN. END **************************************************************************** DATA PROBLEM REPORT IDA2006:022 2006/09/08 IDA DCC Erik Klimczak IDA JTS II *** 2006,213,00:00:00 2006,226,00:00:00 Problem Description OTHER IDA station JTS was down during this time period due to a faulty GPS clock. The station came back up after the station operator replaced the GPS clock. END **************************************************************************** DATA PROBLEM REPORT IDA1997:016 1997/10/22 IDA DCC Peter Davis IDA ESK II *** 1997,273,10:30:00 1997,273,10:30:00 Problem Description INCORRECT TIME The US Coast Guard discontinued operation of its world-wide OMEGA navigation system on the above date. Because a number of IDA stations still use OMEGA-based clocks as their external timing standard, the cessation of the OMEGA signal creates a serious timing problem. An engineering solution has been devised which will require several weeks to implement. We will advise as the necessary auxilliary equipment is installed at each effected station. The stations effected are: AAK, ALE, ARU, BRVK, ESK, KIV, KURK, LVZ, NRIL, and OBN. END **************************************************************************** DATA PROBLEM REPORT IDA2006:029 2006/09/08 IDA DCC Erik Klimczak IDA PFO II BB*-10 2006,194,00:00:00 2006,194,00:00:00 Problem Description OTHER The short period channels from the STS-2 sensor have excessive background noise due to problems with the sensor that are yet to be determined. END PROBLEM RESOLUTION REPORT IDA2006:029 2006/10/05 IDA Erik Klimczak Description of Problem Resolution RESOLUTION Data quality for the short period channels from the STS-2 sensor improved about day 244 (Sept.1). END **************************************************************************** DATA PROBLEM REPORT IDA2006:028 2006/09/08 IDA DCC Erik Klimczak IDA MSEY II *** 2006,237,00:00:00 2006,237,00:00:00 Problem Description DATA LOGGER PROBLEM IDA station MSEY is down due to problems with the DAS that are yet to be determined. END PROBLEM RESOLUTION REPORT IDA2006:028 2006/10/05 IDA Erik Klimczak Description of Problem Resolution RESOLUTION IDA station MSEY came back up about day 270-06:46 after the station operator replaced a fuse in the power supply board in the digitizer. END **************************************************************************** DATA PROBLEM REPORT IDA1997:010 1997/10/16 IDA DCC Peter Davis IDA LVZ II *** 1997,223,10:10:00 1997,259,06:35:00 Problem Description DATA LOGGER PROBLEM The DAT tape drive at LVZ failed on 97,223 and was replaced on 97,259. END **************************************************************************** DATA PROBLEM REPORT IDA2006:027 2006/09/08 IDA DCC Erik Klimczak IDA KWAJ II *** 2006,231,00:00:00 2006,231,00:00:00 Problem Description OTHER IDA station KWAJ is down due to communication problems between the DAS and the ISP. END **************************************************************************** DATA PROBLEM REPORT IDA1997:011 1997/10/16 IDA DCC Peter Davis IDA MSVF II *HZ 1997,262,00:00:00 1997,262,00:00:00 Problem Description DATA LOGGER PROBLEM The data recorded on the *HZ streams appear to be nonseismic. A failure of the RT303 digitizing board is suspected. Steps are being taken to install a replacement. END PROBLEM RESOLUTION REPORT IDA1997:011 1998/11/04 IDA Peter Davis Description of Problem Resolution COMMENT IDA engineers visited the site on Aug 31st-Sept 9th to repair the DAS and GPS clock, and also to analyze DAS-ARS communications problems. The CPU board in the ARS was changed which corrected the DAS-ARS communications problem. The RT303 board for the vertical sensor was replaced. Unfortunately, the problem with KS54000-Z data was traced to the seismometer cable or the instrument itself. Therefore repair was not possible, and the vertical channels remain non-seismic. END **************************************************************************** DATA PROBLEM REPORT IDA2006:026 2006/09/08 IDA DCC Erik Klimczak IDA KAPI II BHN,LHN,VHN 2006,226,00:00:00 2006,226,00:00:00 Problem Description DEAD CHANNEL The North-South channels for the KS-54000 seismometer are out after the station operator removed the circuit board to replace the faulty circuit board for the vertical channels. END **************************************************************************** DATA PROBLEM REPORT IDA1997:012 1997/10/22 IDA DCC Peter Davis IDA AAK II *** 1997,273,10:30:00 1997,273,10:30:00 Problem Description INCORRECT TIME The US Coast Guard discontinued operation of its world-wide OMEGA navigation system on the above date. Because a number of IDA stations still use OMEGA-based clocks as their external timing standard, the cessation of the OMEGA signal creates a serious timing problem. An engineering solution has been devised which will require several weeks to implement. We will advise as the necessary auxilliary equipment is installed at each effected station. The stations effected are: AAK, ALE, ARU, BRVK, ESK, KIV, KURK, LVZ, NRIL, and OBN. END **************************************************************************** DATA PROBLEM REPORT IDA2006:058 2006/12/22 IDA DCC Erik Klimczak IDA PALK II BHN,LHN,VHN 2006,354,00:00:00 2006,354,00:00:00 Problem Description DEAD CHANNEL The North-South channels for the KS-54000 seismometer are nonseismic as of about day 354-14:20. A faulty RT-303 card is suspected. END **************************************************************************** DATA PROBLEM REPORT IDA2006:057 2006/12/20 IDA DCC Erik Klimczak IDA RPN II *-10 2006,341,00:00:00 2006,341,00:00:00 Problem Description DEAD CHANNEL Data quality for all channels from the STS-2 is poor after the sensor began malfunctioning on day 341-17:57. END PROBLEM RESOLUTION REPORT IDA2006:057 2007/01/05 IDA Erik Klimczak Description of Problem Resolution RESOLUTION Data quality for all channels from the STS-2 seismometer improved after the station operator switched a breaker and restored power to the station following a power outage. There is a gap in data from 2006:362-21:44 to 2006:363-15:40. END **************************************************************************** DATA PROBLEM REPORT IDA2006:056 2006/12/20 IDA DCC Erik Klimczak IDA TAU II *** 2006,352,00:00:00 2006,354,00:00:00 Problem Description OTHER IDA station TAU was down from day 352-06:25 to 354-01:41 due to a power outage caused by a faulty UPS. Data acquisition resumed after the station operator restored power to the station. END **************************************************************************** DATA PROBLEM REPORT IDA2006:055 2006/12/13 IDA DCC Erik Klimczak IDA WRAB II *** 2006,346,00:00:00 2006,346,00:00:00 Problem Description OTHER IDA station WRAB is down as of 346-09:26 due to problems with the DAS. The station operator has been requested to return the DAS to UCSD for repair. END **************************************************************************** DATA PROBLEM REPORT IDA2006:050 2006/12/08 IDA DCC Erik Klimczak IDA LVZ II *** 2006,330,00:00:00 2006,340,00:00:00 Problem Description DATA LOGGER PROBLEM IDA station LVZ was down due to communication problems between the DAS and the ISP. Data acquisition resumed after the station operator repaired the uplink to the DAS. END **************************************************************************** DATA PROBLEM REPORT IDA2006:054 2006/12/13 IDA DCC Erik Klimczak IDA NIL II *** 2006,344,00:00:00 2006,344,00:00:00 Problem Description OTHER IDA station NIL is down as of 344-04:55 due to a thunderstorm that damaged station equipment including the DAS, ARS, and ISP. END **************************************************************************** DATA PROBLEM REPORT IDA2006:053 2006/12/08 IDA DCC Erik Klimczak IDA KAPI II *** 2006,342,00:00:00 2006,348,05:28:00 Problem Description OTHER IDA station KAPI is down due to problems with data acquisition that are yet to be determined. END PROBLEM RESOLUTION REPORT IDA2006:053 2006/12/14 IDA Erik Klimczak Description of Problem Resolution RESOLUTION Data acquisition at IDA station KAPI was restored as of about day 348-05:28. END **************************************************************************** DATA PROBLEM REPORT IDA2006:052 2006/12/08 IDA DCC Erik Klimczak IDA HOPE II *** 2006,340,00:00:00 2006,340,00:00:00 Problem Description DEAD CHANNEL The vertical channels from the STS-1 sensor are non-seismic because the mass position has drifted out of normal operating and needs to be recentered. END **************************************************************************** DATA PROBLEM REPORT IDA2006:051 2006/12/08 IDA DCC Erik Klimczak IDA HOPE II *** 2006,342,00:00:00 2006,342,15:21:00 Problem Description DATA LOGGER PROBLEM IDA station HOPE is down due to communication problems between the DAS and the ISP that are yet to be determined. END PROBLEM RESOLUTION REPORT IDA2006:051 2006/12/11 IDA Erik Klimczak Description of Problem Resolution RESOLUTION Data acquisition at IDA station HOPE was restored as of about day 344-15:21 after the station operator cycled power to the ISP and an IDA engineer rebuilt the disk loops. END **************************************************************************** DATA PROBLEM REPORT IDA2006:047 2006/11/27 IDA DCC Erik Klimczak IDA MSEY II *** 2006,324,00:00:00 2006,332,00:00:00 Problem Description OTHER IDA station MSEY was down during this time period due to problems with the DAS. Data acquisition resumed after the station operator cycled power to the DAS. END **************************************************************************** DATA PROBLEM REPORT IDA2006:046 2006/11/14 IDA DCC Erik Klimczak IDA RPN II *** 2006,308,00:00:00 2006,310,00:00:00 Problem Description OTHER IDA station RPN was down during this time period due problems with the DAS following a power outage. Data acquisition was restored when the station operator cycled power to the DAS. END **************************************************************************** DATA PROBLEM REPORT IDA2006:045 2006/11/14 IDA DCC Erik Klimczak IDA PFO II LN*,EN* 2006,194,00:00:00 2006,342,23:30:00 Problem Description DEAD CHANNEL Data quality for all channels from the episensor strong motion detector is poor for reasons yet to be determined. END PROBLEM RESOLUTION REPORT IDA2006:045 2006/12/19 IDA Erik Klimczak Description of Problem Resolution RESOLUTION Data for the episensor is seismic again as of about 342-23:30 after an IDA engineer reconfigured the cabling to the sensor. END **************************************************************************** DATA PROBLEM REPORT IDA2006:044 2006/11/14 IDA DCC Erik Klimczak IDA SHEL II *** 2006,311,00:00:00 2006,313,00:00:00 Problem Description OTHER IDA station SHEL was down from day 311-21:28 to 313-09:18 due to a power failure. When power was restored the vertical channels from the KS-54000 seismometer were non-seismic until the DAS was reset at 313-16:18. END **************************************************************************** DATA PROBLEM REPORT IDA2006:049 2006/11/27 IDA DCC Erik Klimczak IDA JTS II BHN,LHN,VHN 2006,326,00:00:00 2006,354,14:24:00 Problem Description DEAD CHANNEL The North-South channels for the STS-1 seismometer are non-seismic for reasons yet to be determined following a power outage caused by an electrical storm. END PROBLEM RESOLUTION REPORT IDA2006:049 2006/12/21 IDA Erik Klimczak Description of Problem Resolution RESOLUTION The North-South channels for the STS-1 seismometer are seismic as of day 354-14:24. END **************************************************************************** DATA PROBLEM REPORT IDA2006:048 2006/11/27 IDA DCC Erik Klimczak IDA JTS II *** 2006,325,00:00:00 2006,326,00:00:00 Problem Description OTHER IDA station JTS was down from about day 325-11:22 to 326-20:27 due to a power outage following an electrical storm. END **************************************************************************** DATA PROBLEM REPORT ANSS2010:019 2010/03/22 ANSS DCC Leo Sandoval ANSS MNTX US *H* 2010,039,15:30:00 2010,049,20:30:00 Problem Description OTHER SEED COMMENT REFERENCE S 2515 Data dropouts US_MNTX Data Dropouts Noted : 2010,039 15:30 --> 049,20:30 END **************************************************************************** DATA PROBLEM REPORT ANSS2010:014 2010/03/22 ANSS DCC Leo Sandoval ANSS AAM US *H* 2010,039,15:30:00 2010,049,20:30:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE S 2515 Data dropouts US_BMO Excessive Data Dropouts 2010,039,15:30 -> 049,20:30 END **************************************************************************** DATA PROBLEM REPORT ANSS2010:013 2010/03/19 ANSS DCC Leo Sandoval ANSS NATX US *H* 2010,007,20:52:00 2010,007,20:52:00 Problem Description OTHER SEED COMMENT REFERENCE S 2501 Data unusable. US_NATX Instrument on Stops' No useable data 2010,007,20:52 -> ?? END **************************************************************************** DATA PROBLEM REPORT ANSS2010:012 2010/03/19 ANSS DCC Leo Sandoval ANSS BINY US *H* 2010,039,15:30:00 2010,049,20:30:00 Problem Description OTHER SEED COMMENT REFERENCE S 2515 Data dropouts US_BINY large number of data dropouts due to storm systems passing. 2010, 039,15:30 -> 049, 20:30 END **************************************************************************** DATA PROBLEM REPORT ANSS2010:011 2010/03/11 ANSS DCC Leo Sandoval ANSS VNDA GT *H* 2010,043,14:40:00 2010,050,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE S 2515 Data dropouts GT_VNDA Excessive Data Gaps 2010,043,14:40 -> 050,00:00 END **************************************************************************** DATA PROBLEM REPORT ANSS2010:018 2010/03/22 ANSS DCC Leo Sandoval ANSS LBNH US *H* 2010,039,15:30:00 2010,049,20:30:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE S 2515 Data dropouts US_LBNH Data Dropouts Noted: 2010,039,15:30 --> 049,20:30 END **************************************************************************** DATA PROBLEM REPORT ANSS2010:017 2010/03/22 ANSS DCC Leo Sandoval ANSS LAO US *H* 2010,039,15:30:00 2010,049,20:30:00 Problem Description OTHER SEED COMMENT REFERENCE S 2515 Data dropouts US_LAO Data Dropouts Noted: 2010,039,15:30 --> 049,20:30 END **************************************************************************** DATA PROBLEM REPORT ANSS2010:016 2010/03/22 ANSS DCC Leo Sandoval ANSS BW06 US *H* 2010,039,15:30:00 2010,049,20:30:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE S 2515 Data dropouts US_BW06 Data Dropouts Noted: 2010,039,15:30 --> 049,20:30 END **************************************************************************** DATA PROBLEM REPORT ANSS2010:015 2010/03/22 ANSS DCC Leo Sandoval ANSS BOZ US *H* 2010,039,15:30:00 2010,049,20:30:00 Problem Description OTHER SEED COMMENT REFERENCE S 2515 Data dropouts US_BOZ Data Dropouts noted 2010,039,15:30 --> 049,20:30 END **************************************************************************** DATA PROBLEM REPORT ASL1998:000 1998/01/14 ASL DCC Tyler Storm ASL LBTB GT BHZ, LHZ, VHZ 1998,012,13:36:28 1998,014,15:46:04 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4625 Invalid instrument response. The signal quality is very low during this time frame, and the amplitude is approximately one tenth of the normal value. END PROBLEM RESOLUTION REPORT ASL1998:000 1998/01/14 ASL DCC Tyler Storm Description of Problem Resolution COMMENT The problem went away before we could troubleshoot it. Most likely something is "half-broke" and we will see the problem again. END **************************************************************************** DATA PROBLEM REPORT ANSS2010:021 2010/03/22 ANSS DCC Leo Sandoval ANSS RLMT US *H* 2010,039,15:30:00 2010,049,20:30:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE S 2515 Data dropouts US_RLMT Data Dropouts Noted: 2010,039,15:30 --> 049,20:30 END **************************************************************************** DATA PROBLEM REPORT ANSS2010:020 2010/03/22 ANSS DCC Leo Sandoval ANSS NHSC US *H* 2010,039,15:30:00 2010,049,20:30:00 Problem Description OTHER SEED COMMENT REFERENCE S 2515 Data dropouts US_NHSC Data DROPOUTS NOTED: 2010, 039,15:30 --> 049,20:30 END **************************************************************************** DATA PROBLEM REPORT ASL1998:003 1998/02/21 ASL DCC Tyler Storm ASL SNZO IU SHN, HHN 1998,012,19:00:00 1998,034,08:10:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The n/s data channels from the CMG-3T are dead. END PROBLEM RESOLUTION REPORT ASL1998:003 1998/03/05 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION Mass was re-centered 1998,034, 08:10 UTC. END **************************************************************************** DATA PROBLEM REPORT ASL1998:008 1998/03/03 ASL DCC Tyler Storm ASL MA2 IU BHE, LHE, VHE, UHE 1998,034,00:23:00 1998,034,03:59:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. Data are unusable during this time frame. It apprear like the operator was re-centering the mass of the e/w instrument. END PROBLEM RESOLUTION REPORT ASL1998:008 2007/01/12 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The MA2 station operator finished working on the STS1 E component. Data quality returns to normal at 1998, 034, 03:59. END **************************************************************************** DATA PROBLEM REPORT ASL1998:007 1998/02/26 ASL DCC Tyler Storm ASL LSA IC BHE, LHE, VHE, UHE 1997,315,01:20:00 1998,093,12:30:00 Problem Description Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4500 Channel has high noise background. Data from the e/w STS-1 are basically unusable from 1997,315,01:20 to 1997,320,18:00 due to huge spiking (+/- several million counts). After this time frame, the huge spikes diminish, but the noise level is about 16 times higher than it should be. The noise levels on the E/W are so high as to apparently corrupt the instrument response from 2Hz down into all the lower frequencies. END PROBLEM RESOLUTION REPORT ASL1998:007 1998/05/20 ASL DCC Tyler Storm Description of Problem Resolution COMMENT The IC/LSA E/W data streams are back to normal noise levels at 1998, 093, 12:30. END **************************************************************************** DATA PROBLEM REPORT ASL1998:009 1998/03/03 ASL DCC Tyler Storm ASL MA2 IU BHE, LHE, VHE, UHE 1998,036,03:32:00 1998,036,05:09:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. Data are unusable during this time frame. It apprear like the operator was re-centering the mass of the e/w instrument. END PROBLEM RESOLUTION REPORT ASL1998:009 2007/01/16 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The MA2 station operator finished working on the STS1 E component. Data quality returns to normal at 1998, 036, 05:09. END **************************************************************************** DATA PROBLEM REPORT ANSS2010:025 2010/08/14 ANSS DCC Leo Sandoval ANSS PLCA GT 00_BH* 2010,174,04:24:00 2010,174,04:24:00 Problem Description SPIKES SEED COMMENT REFERENCE S 2501 Data unusable. GT_PLCA 2010<175,04:24 00_BH* started spiking on all components cause unknown Data not useable END **************************************************************************** DATA PROBLEM REPORT ANSS2010:024 2010/06/23 ANSS DCC Leo Sandoval ANSS GOGA US *H* 2010,150,00:36:00 2010,173,20:16:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE S 2507 Station down. US_GOGA No data 23 days Comm problem No DATA 2010,150:00:36:00 -> 173,20:16:00 END PROBLEM RESOLUTION REPORT ANSS2010:024 2010/06/23 ANSS DCC Leo Sandoval Description of Problem Resolution RESOLUTION Comm problem resolved 2010,173,20:16 US_GOGA operational END **************************************************************************** DATA PROBLEM REPORT ANSS2010:023 2010/06/07 ANSS DCC Leo Sandoval ANSS TGUH CU *H* 2010,121,00:00:00 2010,141,16:44:00 Problem Description OTHER SEED COMMENT REFERENCE S 2515 Data dropouts CU_TGUH Comm Issues No or Gappy Data 2010, 121,00:00 -> 141,16:44:00 20.7 days Change to LOC codes on 2010, 148,15:58 END **************************************************************************** DATA PROBLEM REPORT ANSS2010:022 2010/05/03 ANSS DCC Leo Sandoval ANSS WMOK US HR_*H* 2010,094,22:48:00 2010,094,23:58:00 Problem Description NOISE US_WMOK HR_channels reached Full Scale and 20 S. surface energy from Baja Event 7.0 2010,094,22:48:00 clipped on several cycles END **************************************************************************** DATA PROBLEM REPORT ANSS2010:029 2010/12/16 ANSS DCC Leo Sandoval ANSS AAM US *H* 2010,305,00:00:00 2010,350,19:00:00 Problem Description OTHER SEED COMMENT REFERENCE S 2501 Data unusable. US_MCWV NO Data 2010,305,00:00 ->> 350,19:00 STS-2 Host Box Failure Instrument on Stops Replaced 16 Dec 2010 Station Operational END PROBLEM RESOLUTION REPORT ANSS2010:029 2010/12/16 ANSS DCC Leo Sandoval Description of Problem Resolution RESOLUTION US_MCWV Host Box Replaced 2010,350,19:00 Station Operational END **************************************************************************** DATA PROBLEM REPORT ANSS2010:028 2010/12/07 ANSS DCC Leo Sandoval ANSS RLMT US *H* 2010,302,15:24:00 2010,313,18:21:00 Problem Description OTHER SEED COMMENT REFERENCE S 2501 Data unusable. US_RLMT No useable data 2010,302,15:24 --> 313,18:21 Instrument on Stops ReCentered 313, 18:21 Operational END **************************************************************************** DATA PROBLEM REPORT ANSS2010:027 2010/11/30 ANSS DCC Leo Sandoval ANSS NATX US *H* 2010,165,15:27:00 2010,165,15:27:00 Problem Description OTHER SEED COMMENT REFERENCE S 2501 Data unusable. US_NATX STS-2 on stop 2010,165,15:27 lost capture 2010,334,18:50 W component will not respond to Re Center Command Large offsets present on channel Z= 5.7 E06 N= -7.0E06 E=4.08E06 counts Needs Physical Re Leveling No Useable data 2010 165->334 END **************************************************************************** DATA PROBLEM REPORT ANSS2010:026 2010/09/03 ANSS DCC Leo Sandoval ANSS GOGA US *H* 2010,212,23:25:00 2010,212,23:25:00 Problem Description OTHER SEED COMMENT REFERENCE S 2507 Station down. IU_GOGA 2010,212,23:25 last data available: Comm problems? Awaiting maint team vist END PROBLEM RESOLUTION REPORT ANSS2010:026 2010/09/27 ANSS DCC Leo Sandoval Description of Problem Resolution RESOLUTION US_GOGA; Station Comm problem resolved: my maint team Sept 20th, Bailer Data staged and final complete 2010,212 ->> 250,23:59:59 END **************************************************************************** DATA PROBLEM REPORT ANSS2010:030 2010/12/21 ANSS DCC Leo Sandoval ANSS ECSD US *H* 2010,323,17:55:00 2010,323,17:55:00 Problem Description OTHER SEED COMMENT REFERENCE S 2515 Data dropouts IW_FXWY No data after: 2010,323,17:55 ->> Await Maint Trip Heavy Snow on Solar Panels END **************************************************************************** DATA PROBLEM REPORT ASL1998:013 1998/03/24 ASL DCC Tyler Storm ASL SPA IU BHE,LHE,VHE,UHE,00/*HE 1998,020,02:30:00 2000,032,21:00:00 Problem Description OTHER SEED COMMENT REFERENCE C 4520 Channel has occasional spiking. There is one large pulse every 1.6 to 2 hours on the E/W STS-1 data streams. These pulses are about ten times the size of normal background noise levels. There was a huge spike (clipped the digitizer) at 02:30 UTC on 20 Jan. The pulses appear after this disturbance. -Tyler Storm END PROBLEM RESOLUTION REPORT ASL1998:013 2001/09/03 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The occasional spiking on the STS1 E component at SPA ends after a sequence of maintenance efforts in early 2000. Althogh the spikes began with a seperation of 1.6 - 2hours, they eventually were 5.5 - 6.5 hours apart. As of late in the day on 2000,032, the spikes occur no more. END **************************************************************************** DATA PROBLEM REPORT ASL1998:012 1998/03/17 ASL DCC George Slad ASL TIXI IU BHN,LHN,VHN,UHN,VMN 1995,227,00:00:00 1997,267,09:35:00 Problem Description CHANNEL ORIENTATION SEED COMMENT REFERENCE C 1830 north component mis-orientation The BHN,LHN,VHN,UHN, and VMN were misoriented by approximately 15 to 20 degrees (whether east or west of north is unknown), so the horizontal components are not perpendicular. I am uncertain how long the misorientation has been in existence, therefore the problem is listed from the start date of the station. END PROBLEM RESOLUTION REPORT ASL1998:012 1998/03/17 ASL DCC George Slad Description of Problem Resolution RESOLUTION Station operators corrected the misorientation on 1997,267,09:35Z. Since the exact orientation and start time of north component misorientation is unknown, the dataless seed volume does not reflect this misorientation. END **************************************************************************** DATA PROBLEM REPORT ASL1998:019 1998/03/31 ASL DCC Tyler Storm ASL MAKZ IU SHN, SHE, HHN, HHE 1998,003,00:00:00 1998,014,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE C 4815 Channel has long period noise. Data contain large pulses every 700 to 800 seconds. END PROBLEM RESOLUTION REPORT ASL1998:019 2000/09/14 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The large pulses on the MAKZ STS-2 E component disappear on 1998,014. END **************************************************************************** DATA PROBLEM REPORT ASL1998:018 1998/03/30 ASL DCC Tyler Storm ASL BDFB GT BHZ,LHZ,VHZ,BHN,LHN,VHN 1998,055,14:08:00 1998,055,18:10:00 Problem Description OTHER SEED COMMENT REFERENCE C 4330 Vertical and north-south inputs swapped (ie, Z <=> N). During this time frame, the vertical and n/s inputs have been swapped for troubleshooting purposes. This means, of course, data labeled z, are actually n/s, and data labeled n/s are z. Our dataless SEED volumes will reflect the changes. END PROBLEM RESOLUTION REPORT ASL1998:018 1998/03/30 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION Channel inputs were swapped back at 18:10, 24 Feb 98. END **************************************************************************** DATA PROBLEM REPORT ASL1998:017 1998/03/27 ASL DCC Tyler Storm ASL SNZO IU SHN, HHN 1998,049,03:00:00 1998,062,21:35:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. Channels are dead. END PROBLEM RESOLUTION REPORT ASL1998:017 2001/10/15 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The CMG3-T at SNZO was recentered late in the day on 1998,062. Data quality returned to normal. END **************************************************************************** DATA PROBLEM REPORT IDA2004:012 2004/03/31 IDA DCC Erik Klimczak IDA CMLA II *** 2004,077,00:00:00 2004,077,00:00:00 Problem Description DATA LOGGER PROBLEM Station is down due to problems with the DAS. The DAS power supply board and a faulty RT303 board in the DAS are suspected. END PROBLEM RESOLUTION REPORT IDA2004:012 2005/01/11 IDA Erik Klimczak Description of Problem Resolution RESOLUTION IDA station CMLA is back up as of 4/9/2004 (day 100) after the station operator removed a faulty RT303 board in the DAS. END **************************************************************************** DATA PROBLEM REPORT IDA2004:011 2004/03/31 IDA DCC Erik Klimczak IDA COCO II BHZ-00,LHZ-00,VHZ-00 2004,076,00:38:00 2004,089,20:15:00 Problem Description DEAD CHANNEL The vertical channels from the KS-54000 seismometer were out during this period. When the DAS was rebooted the vertical channels returned to normal. END **************************************************************************** DATA PROBLEM REPORT ANSS2004:009 2004/11/23 ANSS DCC John McMillan ANSS OXF US BH*, LH* 1993,260,00:00:00 2005,103,22:29:00 Problem Description OTHER SEED COMMENT REFERENCE S 2510 Intrinsic Quanterra UltraShear timing error Quanterra (Q680) timing error due to filter cascade; Information found in Table A Corrections at http://aslwww.cr.usgs.gov/Seismic_Data/timing.html. At 2005*103+22:29 UTC new FIR filter delays were applied to the Q680 code. This effectively resolves timing error issue between BH* and derived LH*. END **************************************************************************** DATA PROBLEM REPORT IDA2004:010 2004/03/31 IDA DCC Erik Klimczak IDA RPN II WDI-00 2003,080,19:34:00 2004,017,15:10:00 Problem Description OTHER Due to a bug in the DAS firmware, data for auxiliary channels, including the WDI-00 microbarograph channel, were stored as floating point numbers and treated as long integers during this time period. Since the station's DAS firmware was upgraded, these channels are now stored and treated as long integers. All previously submitted WDI-00 data is being corrected. END **************************************************************************** DATA PROBLEM REPORT ANSS2004:008 2004/11/23 ANSS DCC John McMillane ANSS OXF US BH*,LH* 2004,275,00:00:00 2005,109,20:07:00 2005,109,20:07:00 Problem Description OTHER SEED COMMENT REFERENCE C 2512 Data spiky and possibly asymmetric. All channels noisy. Problem resolved by STS-2 replacement: 2005*109+20:07 UTC. END **************************************************************************** DATA PROBLEM REPORT ANSS2004:007 2004/11/22 ANSS DCC Mark Meremonte ANSS SDCO US LL 2002,192,00:00:00 2005,098,21:45:00 Problem Description OTHER SEED COMMENT REFERENCE S 2510 Intrinsic Quanterra UltraShear timing error Quanterra (Q730) timing error due to filter cascade; Similar problem described in Table A Corrections at http://aslwww.cr.usgs.gov/Seismic_Data/Timing_html. At 2005*098+21:45 UTC new FIR filter delays were applied to the Q730 code. This effectively resolves timing error issue between BH* and derived LH*. END **************************************************************************** DATA PROBLEM REPORT ANSS2004:006 2004/11/22 ANSS DCC Mark Meremonte ANSS SDCO US BHN, BHE, LHN, LHE 2004,275,00:00:00 2004,275,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE C 2513 Polarity reversal I looked at several deep events from Sotuh America for Polarity reversals; The N-S and E-W channels are reversed. END **************************************************************************** DATA PROBLEM REPORT ANSS2004:005 2004/11/22 ANSS DCC Mark Meremonte ANSS SDCO US BHN,BHE 2004,275,00:00:00 2004,275,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE C 2512 Data spiky and possibly asymmetric. Assymetric waveform envelope and non-seismic in appearance END **************************************************************************** DATA PROBLEM REPORT ANSS2004:003 2004/11/19 ANSS DCC Mark Meremonte ANSS CBKS US BHN, BHE 2004,275,00:00:00 2004,275,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE C 2511 Intermittent long period pulses Intermittent long period pulses that may be tied to diurnal effects; Amplitude and period vary; True beginning is unknown at this time. END **************************************************************************** DATA PROBLEM REPORT ANSS2004:002 2004/11/19 ANSS DCC Mark Meremonte ANSS TPNV US ALL 1992,167,00:00:00 1992,167,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE S 2510 Intrinsic Quanterra UltraShear timing error Quanterra timing error due to filter cascade; Information found in Table A Corrections at http://aslwww.cr.usgs.gov/Seismic_Data/timing.html END **************************************************************************** DATA PROBLEM REPORT ANSS2004:001 2004/11/18 ANSS DCC Mark Meremonte ANSS TPNV US BHN, BHE 2004,275,00:00:00 2004,275,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE C 2511 Intermittent long period pulses Intermittent long period pulses that may be tied to diurnal effects; Amplitude and period vary; True beginning is unknown at this time. END **************************************************************************** DATA PROBLEM REPORT IDA2004:009 2004/03/31 IDA DCC Erik Klimczak IDA PFO II WDI-00 2003,080,17:59:00 2004,014,21:34:00 Problem Description OTHER Due to a bug in the DAS firmware, data for auxiliary channels, including the WDI-00 microbarograph channel, were stored as floating point numbers and treated as long integers during this time period. Since the station's DAS firmware was upgraded, these channels are now stored and treated as long integers. All previously submitted WDI-00 data is being corrected. END **************************************************************************** DATA PROBLEM REPORT IDA2004:008 2004/03/31 IDA DCC Erik Klimczak IDA KDAK II WDI-00 2003,080,19:30:00 2004,015,18:41:00 Problem Description OTHER Due to a bug in the DAS firmware, data for auxiliary channels, including the WDI-00 microbarograph channel, were stored as floating point numbers and treated as long integers during this time period. Since the station's DAS firmware was upgraded, these channels are now stored and treated as long integers. All previously submitted WDI-00 data is being corrected. END **************************************************************************** DATA PROBLEM REPORT IDA2004:007 2004/03/31 IDA DCC Erik Klimczak IDA ASCN II WDI-00 2003,312,11:12:00 2004,015,21:21:00 Problem Description OTHER Due to a bug in the DAS firmware, data for auxiliary channels, including the WDI-00 microbarograph channel, were stored as floating point numbers and treated as long integers during this time period. Since the station's DAS firmware was upgraded, these channels are now stored and treated as long integers. All previously submitted WDI-00 data is being corrected. END **************************************************************************** DATA PROBLEM REPORT IDA2004:006 2004/03/31 IDA DCC Erik Klimczak IDA ALE II WDI-00 2003,228,07:10:00 2004,026,13:01:00 Problem Description OTHER Due to a bug in the DAS firmware, data for auxiliary channels, including the WDI-00 microbarograph channel, were stored as floating point numbers and treated as long integers during this time period. When the station's DAS firmware is upgraded, these channels will be stored and treated as long integers. All previously submitted WDI-00 data up to 2004,026-13:01 has been corrected and resubmitted. END **************************************************************************** DATA PROBLEM REPORT IDA2004:005 2004/03/31 IDA DCC Erik Klimczak IDA BORG II WDI-00 2004,241,12:40:00 2004,015,18:51:00 Problem Description DEAD CHANNEL No WDI-00 data were recorded during this period because the microbarograph was not properly initialized at boot time. The problem has been corrected by installing new DAS firmware. END **************************************************************************** DATA PROBLEM REPORT IDA2004:004 2004/03/19 IDA DCC Erik Klimczak IDA DGAR II WDI-00 2004,039,11:29:00 2004,075,07:55:00 Problem Description DEAD CHANNEL The WDI-00 channel was out during this period due to a faulty microbarometer. When a replacement microbarometer was installed by the station operator, the WDI-00 channel was restored. END **************************************************************************** DATA PROBLEM REPORT IDA2004:003 2004/03/05 IDA DCC Erik Klimczak IDA SUR II BHE-00,LHE-00,VHE-00 2004,056,06:38:00 2004,056,06:38:00 Problem Description DEAD CHANNEL The east-west channels for the STS-1 sensor are out. A faulty RT303 board in the DAS for the BHZ-00, LHZ-00, and VHZ-00 was replaced with the board from the east-west channels (BHE-00, LHE-00, VHE-00). END **************************************************************************** DATA PROBLEM REPORT IDA2004:002 2004/02/17 IDA DCC Erik Klimczak IDA NIL II *** 2004,040,10:24:00 2004,068,00:00:00 Problem Description DATA LOGGER PROBLEM IDA station NIL was down during this period due to problems with the DAS. When the station operator corrected the station processor time and rebooted the DAS, data acquisition resumed. END **************************************************************************** DATA PROBLEM REPORT IDA2004:023 2005/01/11 IDA DCC Erik Klimczak IDA JTS II *** 2004,292,00:00:00 2004,320,00:00:00 Problem Description OTHER IDA station JTS was down due to problems with the station's ISP. Data acquisition resumed after an IDA engineer replaced the ISP. END **************************************************************************** DATA PROBLEM REPORT IDA2004:022 2005/01/11 IDA DCC Erik Klimczak IDA JTS II *** 2004,099,00:00:00 2004,126,00:00:00 Problem Description OTHER IDA station JTS was down and data was not acquired from 2004,099 to 2004,126 due to problems with the station's power supply. Station back up after an IDA engineer corrected an AC power problem, replaced the STS-1 sensors, and RT303 boards in the DAS. END **************************************************************************** DATA PROBLEM REPORT IDA2004:021 2005/01/11 IDA DCC Erik Klimczak IDA HOPE II *-00 2004,174,00:00:00 2004,174,00:00:00 Problem Description DEAD CHANNEL The masses for the STS-1 sensors are intermittently drifting in and out of normal operating range. The station remains operational but the masses for the STS-1 sensors will need to be readjusted during the next station visit. END **************************************************************************** DATA PROBLEM REPORT ANSS2004:019 2004/12/03 ANSS DCC Mark Meremonte ANSS PMR AT BH*, LH* 2004,275,00:00:00 2004,275,00:00:00 Problem Description OTHER Very intermittent squarish pulses with width < 2 sec; END **************************************************************************** DATA PROBLEM REPORT IDA2004:020 2005/01/11 IDA DCC Erik Klimczak IDA FFC II *** 2004,096,00:00:00 2004,125,00:00:00 Problem Description DATA LOGGER PROBLEM IDA station FFC was down day 096 to 125 due to problems with the DAS. Station operational after an IDA engineer replaced the COMM board in the DAS. END **************************************************************************** DATA PROBLEM REPORT ANSS2004:018 2004/12/03 ANSS DCC Mark Meremonte ANSS PMR AT BH*, LH* 2004,275,00:00:00 2004,275,00:00:00 Problem Description NOISE Very regular DC offset occuring approximately every 1.9 hours; prominent on the horizontals END **************************************************************************** DATA PROBLEM REPORT ANSS2004:017 2004/12/03 ANSS DCC Mark Meremonte ANSS PMR AT ALL 2004,275,00:00:00 2004,275,00:00:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE S 2515 Data dropouts Numerous data dropouts throughout signal. For BH*, data only recorded from the first 30-40 seconds of the day; For LH*, essentially no data at all recorded. END **************************************************************************** DATA PROBLEM REPORT ANSS2004:016 2004/12/03 ANSS DCC John McMillan ANSS LRAL US BH*, LH* 2001,183,00:00:00 2005,102,19:41:00 Problem Description OTHER SEED COMMENT REFERENCE S 2510 Intrinsic Quanterra UltraShear timing error Quanterra (Q730) timing error due to filter cascade; Similar problem described in Table A Corrections at http://aslwww.cr.usgs.gov/Seismic_Data/timing.html. At 2005*102+19:41 UTC new FIR filter delays were applied to the Q730 code. This effectively resolves timing error issue between BH* and derived LH*. END **************************************************************************** DATA PROBLEM REPORT ANSS2004:015 2004/11/30 ANSS DCC Mark Meremonte ANSS AAM US BH*, LH* 2004,278,16:00:00 2004,278,16:00:00 Problem Description OTHER SEED COMMENT REFERENCE S 2510 Intrinsic Quanterra UltraShear timing error Quanterra (Q680) timing error due to filter cascade; Information found in Table A Corrections at http://aslwww.cr.usgs.gov/Seismic_Data/timing.html END **************************************************************************** DATA PROBLEM REPORT ANSS2004:014 2004/11/30 ANSS DCC Mark Meremonte ANSS AAM US BH*, LH* 2004,278,16:00:00 2004,278,16:00:00 Problem Description NOISE Much daily cultural noise; quiet during evening local hours (CST). END **************************************************************************** DATA PROBLEM REPORT ANSS2004:013 2004/11/24 ANSS DCC John McMillan ANSS MIAR US BH*, LH* 1992,267,00:00:00 2004,344,19:00:00 Problem Description OTHER SEED COMMENT REFERENCE S 2510 Intrinsic Quanterra UltraShear timing error Quanterra timing error due to filter cascade; Information found in Table A Corrections at http://aslwww.cr.usgs.gov/Seicmic_Data/timing.html On 2004*344+19:00 GMT the Q680 was replaced by a Q330 whose filter cascade does not generate a timing error; In addition, the STS-2 HG was replaced by a STS-2 LG (standard). END **************************************************************************** DATA PROBLEM REPORT ANSS2004:012 2004/11/24 ANSS DCC John McMillan ANSS MIAR US BH*, LH* 2004,282,00:00:00 2004,282,00:00:00 Problem Description VERY LARGE PULSE SEED COMMENT REFERENCE C 2511 Intermittent long period pulses Bipolar pulses random interval END **************************************************************************** DATA PROBLEM REPORT ANSS2004:011 2004/11/24 ANSS DCC John McMillan ANSS NHSC US BH*, LH* 2001,121,00:00:00 2005,102,19:37:00 Problem Description OTHER SEED COMMENT REFERENCE S 2510 Intrinsic Quanterra UltraShear timing error Quanterra (Q730) timing error due to filter cascade; Similar problem described in Table A Corrections at http://aslwww.cr.usgs.gov/Seismic_Data/timing.htm. At 2005*102+19:37 UTC new FIR filter delays were applied to the Q730 code. This effectively resolves timing error issue between BH* and derived LH*. END **************************************************************************** DATA PROBLEM REPORT ANSS2004:010 2004/11/23 ANSS DCC John McMillan ANSS OCWA US BH*, LH* 1998,240,00:00:00 2005,134,00:28:00 Problem Description OTHER SEED COMMENT REFERENCE S 2510 Intrinsic Quanterra UltraShear timing error Quanterra (Q680) timing error due to filter cascade; Information found in Table A Corrections at http://aslwww.cr.usgs.gov/Seismic_Data/timing.html. At 2005*134+00:28 UTC new FIR filter delays were applied to the Q680 code. This effectively resolves timing error issue between BH* and derived LH*. END **************************************************************************** DATA PROBLEM REPORT IDA2004:019 2005/01/11 IDA DCC Erik Klimczak IDA ERM II *** 2004,346,00:00:00 2004,346,00:00:00 Problem Description OTHER IDA station ERM is down as of 346-10:54 due to problems with station wiring. END PROBLEM RESOLUTION REPORT IDA2004:019 2005/03/17 IDA Erik Klimczak Description of Problem Resolution RESOLUTION IDA station ERM is back up as of 2005,021 after the station operator reset the DAS and ARS and reconfigured connections to the STS-1 sensors. END **************************************************************************** DATA PROBLEM REPORT IDA2004:018 2005/01/11 IDA DCC Erik Klimczak IDA ERM II **Z-00 2004,062,00:00:00 2004,062,00:00:00 Problem Description DEAD CHANNEL The vertical channels from the STS-1 sensor are non-seismic for reasons yet to be determined. END PROBLEM RESOLUTION REPORT IDA2004:018 2006/09/08 IDA Erik Klimczak Description of Problem Resolution RESOLUTION The vertical channels for the STS-1 seismometer are back as of about day 243-02:40 after an IDA engineer visited the site and replaced the STS-1 seismometer. END **************************************************************************** DATA PROBLEM REPORT IDA2004:017 2005/01/11 IDA DCC Erik Klimczak IDA COCO II *** 2004,193,00:00:00 2004,268,00:00:00 Problem Description OTHER IDA station COCO was down and data was not acquired from 2004,193 to 2004,268 due to problems with the station's power supply. Data acquisition resumed after an IDA engineer replaced the Main Power Supply,ARS,and circuit boards in the DAS. END **************************************************************************** DATA PROBLEM REPORT IDA2004:016 2005/01/11 IDA DCC Erik Klimczak IDA CMLA II ***-00,***-10 2004,140,00:00:00 2004,140,00:00:00 Problem Description DEAD CHANNEL The horizontal channels for the STS-1 sensor and the short period channels from the STS-2 sensor are dead. The vertical channels were non-seismic 5/19/2004 to 6/14/2004 but were restored following a DAS reboot. The station operator has recently reported problems with the station's GPS clock (12/08/2004). END **************************************************************************** DATA PROBLEM REPORT IDA2004:015 2005/01/11 IDA DCC Erik Klimczak IDA BFO II VAN,VAE 2004,200,00:00:00 2004,200,00:00:00 Problem Description OTHER The response for the VAN and VAE channels from their original installation to the present has been corrected. Former response for these channels was incorrect. END **************************************************************************** DATA PROBLEM REPORT IDA2004:014 2005/01/11 IDA DCC Erik Klimczak IDA ASCN II *** 2004,218,00:00:00 2004,309,00:00:00 Problem Description OTHER IDA station ASCN was down and data was not acquired from 2004,218 to 2004,309 due to problems with the station's power supply. Data acquisition resumed after the station operator replaced the Power Supply, LAN extender, and GPS clock. END **************************************************************************** DATA PROBLEM REPORT IDA2004:013 2005/01/11 IDA DCC Erik Klimczak IDA AAK II *** 2004,155,00:00:00 2004,227,00:00:00 Problem Description OTHER IDA station AAK was down during this period due to problems with the GPS clock. When the station operator replaced the GPS clock and rebooted the DAS, normal data aquisition resumed. END **************************************************************************** DATA PROBLEM REPORT IDA2004:034 2005/01/11 IDA DCC Erik Klimczak IDA PALK II **N-10 2004,173,00:00:00 2004,191,00:00:00 Problem Description DEAD CHANNEL The NS channels from the CMG-3T seismometer were saturated during this time period. Data returned to normal after the masses were recentered by the station operator. END **************************************************************************** DATA PROBLEM REPORT IDA2004:033 2005/01/11 IDA DCC Erik Klimczak IDA NIL II *** 2004,355,00:00:00 2004,355,00:00:00 Problem Description DATA LOGGER PROBLEM Station is down due to problems with the DAS that are yet to be determined. Short period data are still being recorded but are not continuous due to excessive reboots. END **************************************************************************** DATA PROBLEM REPORT IDA2004:032 2005/01/11 IDA DCC Erik Klimczak IDA MSVF II *** 2004,194,00:00:00 2004,231,00:00:00 Problem Description OTHER IDA station MSVF was down due to problems with the remote power supply. Station operable again after an IDA engineer fixed the power supply,and replaced the DAT drive and circuit boards in the DAS. END **************************************************************************** DATA PROBLEM REPORT IDA2004:031 2005/01/11 IDA DCC Erik Klimczak IDA MSEY II **E-00,**N-00,**Z-00 2004,212,00:00:00 2004,273,00:00:00 Problem Description DATA LOGGER PROBLEM The 24-bit (BB*)channels for the KS-54000 seismometer were non-seismic due to faulty circuit boards in the DAS. Data was restored when an IDA engineer replaced the power supply, CPU,COM, and 24-bit A/D boards in the DAS. END **************************************************************************** DATA PROBLEM REPORT IDA2004:030 2005/01/11 IDA DCC Erik Klimczak IDA MSEY II **E-00,**Z-00 2004,129,00:00:00 2004,137,00:00:00 Problem Description DATA LOGGER PROBLEM The BBZ and BBE channels for the KS-54000 seismometer were non-seismic 129-08:20 to 137-09:00 due to two faulty circuit boards in the DAS. These channels were restored after the station operator replaced the boards, the DAT drive, and power cycled the digitizer. END **************************************************************************** DATA PROBLEM REPORT ASL2003:018 2003/02/04 ASL DCC Tyler Storm ASL MAKZ IU 10/* 2002,294,00:00:00 2002,294,00:00:00 Problem Description SPIKES SEED COMMENT REFERENCE C 4410 Channel data quality is poor. Severe spiking on all channels. END **************************************************************************** DATA PROBLEM REPORT ASL2003:019 2003/02/05 ASL DCC Tyler Storm ASL BILL IU 00/??E 2002,354,22:07:00 2002,356,14:39:00 Problem Description OTHER SEED COMMENT REFERENCE C 4010 Channel is down. Data from the E/W STS-1 are unuseable. END PROBLEM RESOLUTION REPORT ASL2003:019 2003/02/05 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION Back to normal at 2002,356,14:39:00. END **************************************************************************** DATA PROBLEM REPORT ASL2003:012 2003/01/22 ASL DCC Valerie Peyton ASL KMBO IU 00/*HZ 2003,014,00:00:00 2003,066,08:13:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4620 Incorrect instrument response for low frequencies only The Z component of the STS1 at KMBO appears to be in 20 second mode. Instrument response is invalid from 0.05Hz down through all the lower frequencies. Because of an extended data outage, we do not know the precise start time of the problem. If data tapes covering the outage come in, we will revise the start time as necessary. END PROBLEM RESOLUTION REPORT ASL2003:012 2003/03/07 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The KMBO station operator replaced the STS1 Z feedback box, which solved the incorrect response problem. Data quality returns to normal at 2003, 066, 08:13. END **************************************************************************** DATA PROBLEM REPORT ASL2003:013 2003/01/27 ASL DCC Valerie Peyton ASL QSPA IU */* 2003,026,05:25:00 2003,027,01:40:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. A couple of tours from South Pole visited QSPA and some station maintenance was performed during this time period. END PROBLEM RESOLUTION REPORT ASL2003:013 2003/01/27 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Data quality returns to normal at 2003, 027, 01:40. END **************************************************************************** DATA PROBLEM REPORT IDA2004:029 2005/01/11 IDA DCC Erik Klimczak IDA MBAR II *** 2004,167,00:00:00 2004,206,00:00:00 Problem Description OTHER An IDA engineer visited the station to replace a faulty GPS clock, and reconfigure boards in the DAS for the horizontal channels from the KS-54000 seismometer. END **************************************************************************** DATA PROBLEM REPORT ASL2003:010 2003/01/21 ASL DCC Tyler Storm ASL TSUM IU 00/* 2002,357,09:39:00 2003,044,13:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. All channels from the STS-1s are dead END PROBLEM RESOLUTION REPORT ASL2003:010 2003/03/05 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION STS-1 data are back at 2003,044,13:00. END **************************************************************************** DATA PROBLEM REPORT IDA2004:028 2005/01/11 IDA DCC Erik Klimczak IDA MBAR II *** 2003,313,00:00:00 2004,139,00:00:00 Problem Description DATA LOGGER PROBLEM IDA station MBAR was down day 2003,313 to 2004,139 due to problems with the DAS and GPS clock. Station operational after an IDA engineer replaced faulty boards in the DAS, damaged VSAT equipment,and solar power equipment. END **************************************************************************** DATA PROBLEM REPORT ASL2003:011 2003/01/22 ASL DCC Valerie Peyton ASL PAYG IU */* 2003,022,16:00:00 2003,025,15:05:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. An ASL field engineer is on site at PAYG performing station maintenance. Expect variable data quality, tests, and possibly calibrations. END PROBLEM RESOLUTION REPORT ASL2003:011 2003/01/30 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Our field engineer left PAYG in excellent operational order at 2003, 025, 15:05. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT IDA2004:027 2005/01/11 IDA DCC Erik Klimczak IDA KWAJ II WDO 2004,264,00:00:00 2004,264,00:00:00 Problem Description DEAD CHANNEL The WDO channel data for IDA station KWAJ is incorrect for reasons yet to be determined. A trip to the station by an IDA engineer is now underway. END PROBLEM RESOLUTION REPORT IDA2004:027 2005/03/17 IDA Erik Klimczak Description of Problem Resolution RESOLUTION The WDO channel was restored after an IDA engineer replaced the microbarometer. The station's UPS batteries and ISP were also replaced. END **************************************************************************** DATA PROBLEM REPORT ASL2003:016 2003/01/29 ASL DCC Valerie Peyton ASL YSS IU *LE 1995,215,00:00:00 1998,035,02:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The E component of the FBA23 at YSS was dead for most of this time period. At times it appeared to record acceleration data properly, but we cannot guarantee that this apparent data is correct. The rest of the time this channel simply recorded digitizer noise. END PROBLEM RESOLUTION REPORT ASL2003:016 2003/01/29 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION A replacement FBA23 was installed at YSS at 1998, 035, 02:00. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT IDA2004:026 2005/01/11 IDA DCC Erik Klimczak IDA KURK II **E-00,**N-00 2004,216,00:00:00 2004,216,00:00:00 Problem Description OTHER The data quality for the EW and NS channels for the STS-1 sensor is poor. END PROBLEM RESOLUTION REPORT IDA2004:026 2005/06/14 IDA Erik Klimczak Description of Problem Resolution RESOLUTION The data quality for the EW and NS broadband channels at IDA station KURK has improved after an IDA engineer replaced the STS-1 sensors. END **************************************************************************** DATA PROBLEM REPORT ASL2003:017 2003/01/31 ASL DCC Valerie Peyton ASL COR IU */* 2003,030,21:33:00 2003,032,00:52:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. The COR station operator is replacing the STS1 Z at this time. Expect variable data quality on all data channels, as well as tests, and possibly calibrations. END PROBLEM RESOLUTION REPORT ASL2003:017 2003/02/13 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The COR station operator replaced the STS1 Z rather quickly, but it took a couple of return visits to get the instrument working properly. Data quality returns to normal at 2003, 032, 00:52. END **************************************************************************** DATA PROBLEM REPORT IDA2004:025 2005/01/11 IDA DCC Erik Klimczak IDA KIV II *** 2004,222,00:00:00 2004,264,00:00:00 Problem Description DATA LOGGER PROBLEM IDA station KIV was down from day 222 to 264 due to a lightning strike causing damage to uplink. Station operational again after station operator replaced the XCOM, RT432, and RT430 boards in the DAS. END **************************************************************************** DATA PROBLEM REPORT ASL2003:014 2003/01/28 ASL DCC Valerie Peyton ASL SNZO IU */* 2003,027,20:35:00 2003,032,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. An ASL field engineer team is at SNZO for station maintenance, including replacment of the KS36000I with a 54000. Expect variable data quality, tests, and calibrations. END PROBLEM RESOLUTION REPORT ASL2003:014 2003/02/03 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The ASL field team left SNZO in excellent operational order. Data quality returns to normal at 2003, 032, 00:00. END **************************************************************************** DATA PROBLEM REPORT IDA2004:024 2005/01/11 IDA DCC Erik Klimczak IDA JTS II *-10 2004,276,00:00:00 2004,276,00:00:00 Problem Description DEAD CHANNEL The short period for the STS-2 sensor are dead for reasons yet to be determined. An IDA engineer recentered the masses on the last station visit, and the station operator has dried and reconnected all connections to the STS-2 sensor. Another trip to the station to replace the STS-2 sensor is planned. END PROBLEM RESOLUTION REPORT IDA2004:024 2005/03/17 IDA Erik Klimczak Description of Problem Resolution RESOLUTION The short period channels for the STS-2 sensor were restored as of 2005:039-22:40, after an IDA engineer replaced the STS-2 sensor. END **************************************************************************** DATA PROBLEM REPORT ASL2003:015 2003/01/28 ASL DCC Valerie Peyton ASL NWAO IU 10/* 2003,028,09:30:00 2003,028,22:50:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. All three components of the CMG3-T-B at NWAO go to digitizer noise at this time. Data are not usable. END PROBLEM RESOLUTION REPORT ASL2003:015 2003/01/28 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION A technician was at NWAO preparing the site for a small upgrade (the CMG3-T-B will soon be added to the International Monitoring System). Part of the preparations involved temporarily unplugging the CMG3-T-B. Data quality returns to normal 2003, 028, 22:50. END **************************************************************************** DATA PROBLEM REPORT IDA2004:044 2006/09/12 IDA DCC Erik Klimczak IDA ERM II LNZ,ENZ 2004,067,00:00:00 2004,067,00:00:00 Problem Description DEAD CHANNEL The vertical channels for the FBA-23 sensor are non-seismic due to a faulty sensor. END PROBLEM RESOLUTION REPORT IDA2004:044 2012/12/07 IDA Erik Klimczak Description of Problem Resolution RESOLUTION The FBA-23 sensor at IDA station ERM was replaced with an Episensor strong motion sensor when IDA engineers upgraded the station to a Quanterra Q330HR system. END **************************************************************************** DATA PROBLEM REPORT IDA2004:043 2005/01/11 IDA DCC Erik Klimczak IDA NNA II *** 2004,343,00:00:00 2004,348,00:00:00 Problem Description DATA LOGGER PROBLEM IDA station NNA was down from day 343 to 348 due to problems with the DAS. Station operational after station operator replaced circuit boards in the DAS and ARS. END **************************************************************************** DATA PROBLEM REPORT IDA2004:042 2005/01/11 IDA DCC Erik Klimczak IDA LVZ II *** 2004,165,00:00:00 2004,189,00:00:00 Problem Description DATA LOGGER PROBLEM IDA station LVZ was down from day 165 to 189 due to a lightning strike causing damage to link between DAS and ISP. Station operational again after station operator replaced circuit boards in the DAS. END **************************************************************************** DATA PROBLEM REPORT IDA2004:041 2005/01/11 IDA DCC Erik Klimczak IDA TAU II *** 2004,323,00:00:00 2004,359,00:00:00 Problem Description OTHER IDA station TAU was down during this period due to workstation failure. Station operational again after station operator replaced workstation. END **************************************************************************** DATA PROBLEM REPORT IDA2004:040 2005/01/11 IDA DCC Erik Klimczak IDA SHEL II **Z-00 2004,220,00:00:00 2004,237,00:00:00 Problem Description DEAD CHANNEL The vertical channels from the KS-54000 seismometer were non-seismic during this period. Channels were restored after station operator rebooted the DAS. END **************************************************************************** DATA PROBLEM REPORT ASL2003:009 2003/01/21 ASL DCC Valerie Peyton ASL KBS IU */* 2003,020,13:30:00 2003,022,23:30:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. An ASL field engineer is at KBS performing station maintenance. Expect tests, calibrations, and varying data quality. END PROBLEM RESOLUTION REPORT ASL2003:009 2003/01/24 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Our field engineer left KBS in partial operating order at 2003, 022, 23:30. Data quality for the STS1 instruments returns to normal at this time. The STS1 Z component is not currently calibrating properly. We are investigating the problem, but it does not affect data quality. The STS2 continues to resist all efforts at repair. The owner has been asked to ship replacement parts which station personnel will use in the next attempt to repair the instrument. END **************************************************************************** DATA PROBLEM REPORT ASL2003:007 2003/01/21 ASL DCC Valerie Peyton ASL MA2 IU 00/*HE 2003,020,09:36:00 2003,022,00:55:00 Problem Description OTHER SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The E component of the STS1 at MA2 has nearly fallen against one of the stops. Currently, data are still usable, but quality is compromised. END PROBLEM RESOLUTION REPORT ASL2003:007 2003/01/22 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The MA2 station operator recentered the STS1 E component at 2003, 022, 00:55. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2003:008 2003/01/21 ASL DCC Valerie Peyton ASL SPA IU */* 2003,017,23:49:00 2003,021,20:50:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. ASL field engineers are at SPA for station maintenance. Expect variable data quality, calibrations, and other tests. END PROBLEM RESOLUTION REPORT ASL2003:008 2003/01/22 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The ASL field engineers left SPA in great working condition at 2003, 021, 20:50. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2003:001 2003/01/09 ASL DCC Valerie Peyton ASL QSPA IU */* 2002,363,00:00:00 2003,022,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE S 110 TEST DATA: Calibration, and testing in progress. An ASL field team is currently on location at QSPA installing the station. Data are streaming live while the South Pole is in contact with satellites. Since installation is not yet complete, data quality and availability are currently erratic. In addition, calibrations and other tests should be expected. END PROBLEM RESOLUTION REPORT ASL2003:001 2003/01/21 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The ASL field team left QSPA fully installed and in fantastic operating condition. The borehole seismometer orientations are not reliable until 2003, 013. Data quality is excellent as of 2003, 022. END **************************************************************************** DATA PROBLEM REPORT ASL2003:002 2003/01/13 ASL DCC Valerie Peyton ASL COR IU 00/*HZ 2003,012,05:27:00 2003,032,00:52:00 Problem Description OTHER SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The Z component of the STS1 at COR has nearly fallen against one of the stops. Currently, data are still usable, but quality is compromised. SUPPLEMENT At 2003, 022, 12:56 the Z comopnent of the STS1 at COR fell completely against a stop and made the data unusable. The station operator will soon replace the instrument. END PROBLEM RESOLUTION REPORT ASL2003:002 2003/02/13 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The COR station operator replaced the STS1 Z. Data quality returns to normal at 2003, 032, 00:52. END **************************************************************************** DATA PROBLEM REPORT IDA2004:039 2005/01/11 IDA DCC Erik Klimczak IDA SHEL II *** 2004,153,00:00:00 2004,213,00:00:00 Problem Description DATA LOGGER PROBLEM IDA station SHEL was down during this period due to problems with communication between the DAS and ARS. Station operational again after station operator replaced DAS equipment. END **************************************************************************** DATA PROBLEM REPORT ASL2003:000 2003/01/06 ASL DCC Valerie Peyton ASL KIP IU 00/*H* 2003,004,22:19:00 2003,007,21:50:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. All three of the STS1 components at KIP are currently inoperational. The cause of the problem is unknown. END PROBLEM RESOLUTION REPORT ASL2003:000 2003/01/08 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The UPS powering the STS1s at KIP had failed. With the help of advice from Geoscope (the owners of the STS1s), the KIP station operator was able to return power to all three STS1 components. Data quality returns to normal at 2003, 007, 21:50. END **************************************************************************** DATA PROBLEM REPORT IDA2004:038 2005/01/11 IDA DCC Erik Klimczak IDA SACV II *** 2004,160,00:00:00 2004,199,00:00:00 Problem Description DATA LOGGER PROBLEM IDA station SACV was down during this period due to communication problems between the DAS and ISP. Station operational after an IDA engineer replaced faulty XCOMM and RT303 boards in the DAS, and installed new modems. END **************************************************************************** DATA PROBLEM REPORT ASL2003:005 2003/01/13 ASL DCC Valerie Peyton ASL KMBO IU */* 2003,013,00:00:00 2003,018,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. An ASL field engineer is at KMBO for station maintenance. Expect variable data quality, calibrations, and other tests. END PROBLEM RESOLUTION REPORT ASL2003:005 2003/01/21 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Our field engineer left KMBO in tip-top operating condition on 2003, 018, 00:00. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT IDA2004:037 2005/01/11 IDA DCC Erik Klimczak IDA PFO II **E-00 2004,345,00:00:00 2004,352,00:00:00 Problem Description DEAD CHANNEL The EW channels from the STS-1 sensor were saturated from day 345 to 352. Data returned to normal after the masses were recentered. END **************************************************************************** DATA PROBLEM REPORT ASL2003:006 2003/01/14 ASL DCC Valerie Peyton ASL ANMO IU 10/* 2003,011,16:14:00 2003,014,17:37:00 Problem Description OTHER SEED COMMENT REFERENCE C 1840 Calibration data We are running calibrations and other tests on the CMG3-T-B at ANMO. Expect variable data quality. END PROBLEM RESOLUTION REPORT ASL2003:006 2003/01/14 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The calibrations and related tests on the CMG3-T-B at ANMO are finished. Data quality returns to normal at 2003, 014, 17:37. END **************************************************************************** DATA PROBLEM REPORT IDA2004:036 2005/01/11 IDA DCC Erik Klimczak IDA PFO II *** 2004,226,00:00:00 2004,233,00:00:00 Problem Description OTHER IDA station PFO was down 226-19:00 to 233-17:12 due to damage caused by a lightning strike. Data acquisition resumed after an IDA engineer replaced ethernet switches in the vault and recording trailer. END **************************************************************************** DATA PROBLEM REPORT ASL2003:003 2003/01/13 ASL DCC Valerie Peyton ASL KIP IU 00/*H* 2003,011,00:11:00 2003,013,20:58:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. All three components of the STS1 at KIP are dead. It looks like there is a problem with power to the STS1s. END PROBLEM RESOLUTION REPORT ASL2003:003 2003/01/14 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The KIP station operator restored power to the STS1s at 2003, 013, 20:58. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT IDA2004:035 2005/01/11 IDA DCC Erik Klimczak IDA PALK II **N-10,**Z-10 2004,355,00:00:00 2004,355,00:00:00 Problem Description DEAD CHANNEL The NS and vertical channels from the CMG-3T seismometer are dead, and there are intermittent gaps in data due to power outages at the station. END **************************************************************************** DATA PROBLEM REPORT ASL2003:004 2003/01/13 ASL DCC Valerie Peyton ASL OTAV IU */* 2003,013,00:00:00 2003,017,10:40:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. An ASL field engineer is at OTAV for station maintenance. Expect variable data quality, calibrations, and other tests. END PROBLEM RESOLUTION REPORT ASL2003:004 2003/01/30 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Our field engineer left OTAV in good operational order at 2003, 017, 10:40. Data quality for the STS1 components returns to normal at this time. The CMG has proved impossible to repair and will be replaced as soon as possible. For closure on the CMG problems, please see ASL2002:110. END **************************************************************************** DATA PROBLEM REPORT ASL2003:030 2003/02/21 ASL DCC Valerie Peyton ASL ANMO IU 00/LDO 2001,040,00:00:00 2001,040,00:00:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE C 4215 Time uncertain; error less than 1 second. The manner in which Paroscientific microbarograph data are sampled introduces known, uncorrectable timing errors. Microbarograph data from a Paroscientific microbarograph are collected through a serial port, and not obtained via a proper digitizer. Once a second the system "requests" a data point from the microbarograph. The time stamp given each data point is the time at which the request for data point was made. There is no way to determine precisely when each data point was sampled. The timing error introduced by this sampling method is less than 1 second. END PROBLEM RESOLUTION REPORT ASL2003:030 2003/02/21 ASL DCC Valerie Peyton Description of Problem Resolution COMMENT As long as the Paroscientific microbarograph is attached to a serial port and not to a proper digitizing board, this timing ambiguity will remain. END **************************************************************************** DATA PROBLEM REPORT ASL2003:031 2003/02/24 ASL DCC Valerie Peyton ASL QSPA IU 20/*H* 2003,053,19:42:00 2003,057,02:43:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. All three components of the STS2 at QSPA have lost mass capture. The QSPA station operator will attempt to relevel the instrument as soon as possible. END PROBLEM RESOLUTION REPORT ASL2003:031 2003/02/26 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The QSPA station operator releveled the STS2. Data quality returns to normal at 2003, 057, 02:43. END **************************************************************************** DATA PROBLEM REPORT ASL2003:035 2003/02/26 ASL DCC Valerie Peyton ASL COR IU 00/* 2003,056,22:13:00 2003,056,23:53:00 Problem Description OTHER SEED COMMENT REFERENCE S 110 TEST DATA: Calibration, and testing in progress. During this time span an attempt was made to calibrate the COR STS1 components. END PROBLEM RESOLUTION REPORT ASL2003:035 2003/02/26 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The COR STS1 calibration was cut short after about an hour and a half. Data quality returns to normal at 2003, 056, 23:53. END **************************************************************************** DATA PROBLEM REPORT ASL2003:032 2003/02/24 ASL DCC Valerie Peyton ASL SPA IU 00/*HN 2003,052,10:49:00 2003,052,20:18:00 Problem Description OTHER SEED COMMENT REFERENCE C 4400 Channel data quality is very poor. The STS1 N component slipped into free oscillation during the SPA station operator's attemp to recenter it. END PROBLEM RESOLUTION REPORT ASL2003:032 2003/02/24 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The SPA station operator was able to reset and recenter the STS1 N component roughly 10 hours after the oscillations started. Data quality returns to normal at 2003, 052, 20:18. END **************************************************************************** DATA PROBLEM REPORT ASL2003:033 2003/02/24 ASL DCC Valerie Peyton ASL CHTO IU */* 2003,036,00:00:00 2003,043,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. An ASL field engineer team is at CHTO for station maintenance, including replacment of the KS36000I with a 54000. Expect variable data quality, tests, and calibrations. END PROBLEM RESOLUTION REPORT ASL2003:033 2003/02/24 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The ASL field team left CHTO in excellent operational order. Data quality returns to normal at 2003, 043, 00:00. END **************************************************************************** DATA PROBLEM REPORT ASL2003:038 2003/03/05 ASL DCC Valerie Peyton ASL COR IU */* 2003,063,17:58:00 2003,065,10:40:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. An ASL field engineer is at COR for station maintenance and station operator training. END PROBLEM RESOLUTION REPORT ASL2003:038 2003/03/06 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The ASL field engineer left COR in fantastic operating condition at 2003, 065, 10:40. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2003:039 2003/03/05 ASL DCC Valerie Peyton ASL COR IU 00/LDO 2003,062,00:00:00 2003,062,00:00:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE C 4215 Time uncertain; error less than 1 second. The manner in which Paroscientific microbarograph data are sampled introduces known, uncorrectable timing errors. Microbarograph data from a Paroscientific microbarograph are collected through a serial port, and not obtained via a proper digitizer. Once a second the system "requests" a data point from the microbarograph. The time stamp given each data point is the time at which the request for data point was made. There is no way to determine precisely when each data point was sampled. The timing error introduced by this sampling method is less than 1 second. END PROBLEM RESOLUTION REPORT ASL2003:039 2003/03/05 ASL DCC Valerie Peyton Description of Problem Resolution COMMENT As long as the Paroscientific microbarograph is attached to a serial port and not to a proper digitizing board, this timing ambiguity will remain unresolved. END **************************************************************************** DATA PROBLEM REPORT ASL2003:036 2003/02/28 ASL DCC Valerie Peyton ASL QSPA IU 00/LDO 2002,363,00:00:00 2002,363,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE C 7020 Digital responses contain nominal values. The NovaLynx microbarograph installed at QSPA has two issues which data users need to know about: 1) Although the channel is named LDO, the microbarograph is housed _inside_ the station building. 2) The microbarograph is designed to operate at high altitudes, and therefore its sensitivity range is from 600 mb to 800 mb. An output voltage of 0V corresponds to 600 millibars, and is recorded as 0 counts in the data. Therefore, to properly use the LDO channel data, the user must at 600 mb to the recorded pressure values. The dataless seed volume for QSPA includes response information for the 00/LDO channel. This response information will allow the user to properly convert counts to millibars, but to calculate the full barometric pressure one must still add 600 mb. END PROBLEM RESOLUTION REPORT ASL2003:036 2003/02/28 ASL DCC Valerie Peyton Description of Problem Resolution COMMENT At some point, when we can once more access QSPA, we plan to change the channel name to 00/LDI to better reflect the data being recorded. The second issue cannot be accounted for in the channel response information, as the response cascade only allows for multiplication and division, not for addition. Currently, it is not possible to purchase a high-altitude microbarograph that does not possess a similar offset in its data output. For the time being, the extra 600 millibars will have to be accounted for by hand. END **************************************************************************** DATA PROBLEM REPORT ASL2003:037 2003/03/03 ASL DCC Valerie Peyton ASL SPA IU 00/LWS 2002,004,01:00:00 2002,351,23:39:00 Problem Description OTHER SEED COMMENT REFERENCE C 7020 Digital responses contain nominal values. During this time period, the SPA wind speed data was being collected by an 8-bit digitizer. This digitizer was originally set up to record mass position data. As a result, the 0V output was programmed for 128 counts. In order to use the wind speed data during this time period, one must first subtract 128 counts and only then can one use the information in the LWS dataless seed to convert counts to wind speed (in meters/second). END PROBLEM RESOLUTION REPORT ASL2003:037 2003/03/03 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The SPA wind sensor was moved to QSPA at the end of this time period. At QSPA the wind speed data is being collected with a normal 24-bit digitizer, thus eliminating the need to do any subtraction before converting counts to m/s. END **************************************************************************** DATA PROBLEM REPORT ASL2012:001 2012/06/26 ASL DCC Tyler Storm ASL KMBO IU * 2012,151,00:00:00 2012,151,00:00:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 440 Clock Unlocked. Timing quality at KMBO had been low for some time, but on day 151 the primary and secondary timing differed by 13 seconds after a system reset. After another system reset on day 169 the primary and secondary appear to be 120 seconds different with the 00 data being 60 seconds fast and the 10 data 120 seconds fast. END **************************************************************************** DATA PROBLEM REPORT ASL2003:020 2003/02/05 ASL DCC Valerie Peyton ASL KMBO IU */* 2003,036,07:13:00 2003,036,10:50:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. The KMBO station operator was in the vault replacing the FBA23 during this time period. Data quality is compromised. END PROBLEM RESOLUTION REPORT ASL2003:020 2003/02/05 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The KMBO station operator left the vault at 2003, 026, 10:50. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2003:029 2003/02/20 ASL DCC Valerie Peyton ASL SNZO IU 00/LDO 2003,029,21:00:00 2003,029,21:00:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE C 4215 Time uncertain; error less than 1 second. The manner in which Paroscientific microbarograph data are sampled introduces known, uncorrectable timing errors. Microbarograph data from a Paroscientific microbarograph are collected through a serial port, and not obtained via a proper digitizer. Once a second the system "requests" a data point from the microbarograph. The time stamp given each data point is the time at which the request for data point was made. There is no way to determine precisely when each data point was sampled. The timing error introduced by this sampling method is less than 1 second. END PROBLEM RESOLUTION REPORT ASL2003:029 2003/02/20 ASL DCC Valerie Peyton Description of Problem Resolution COMMENT As long as the Paroscientific microbarograph is attached to a serial port and not to a proper digitizing board, this timing ambiguity will remain. END **************************************************************************** DATA PROBLEM REPORT ASL2003:023 2003/02/20 ASL DCC Valerie Peyton ASL DWPF IU 00/LDO 2002,325,18:00:00 2002,325,18:00:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE C 4215 Time uncertain; error less than 1 second. The manner in which microbarograph data are sampled introduces known, uncorrectable timing errors. Microbarograph data are collected through a serial port, and not obtained via a proper digitizer. Once a second the system "requests" a data point from the microbarograph. The time stamp given each data point is the time at which the request for data point was made. There is no way to determine precisely when each data point was sampled. The timing error introduced by this sampling method is less than 1 second. END PROBLEM RESOLUTION REPORT ASL2003:023 2003/02/20 ASL DCC Valerie Peyton Description of Problem Resolution COMMENT As long as the Paroscientific microbarograph is attached to a serial port and not to a proper digitizing board, this timing ambiguity will remain unresolved. END **************************************************************************** DATA PROBLEM REPORT ASL2003:024 2003/02/20 ASL DCC Valerie Peyton ASL TRQA IU 00/LDO 2000,302,00:00:00 2000,302,00:00:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE C 4215 Time uncertain; error less than 1 second. The manner in which Paroscientific microbarograph data are sampled introduces known, uncorrectable timing errors. Microbarograph data from a Paroscientific microbarograph are collected through a serial port, and not obtained via a proper digitizer. Once a second the system "requests" a data point from the microbarograph. The time stamp given each data point is the time at which the request for data point was made. There is no way to determine precisely when each data point was sampled. The timing error introduced by this sampling method is less than 1 second. END PROBLEM RESOLUTION REPORT ASL2003:024 2003/02/20 ASL DCC Valerie Peyton Description of Problem Resolution COMMENT As long as the Paroscientific microbarograph is attached to a serial port and not to a proper digitizing board, this timing ambiguity will remain unresolved. END **************************************************************************** DATA PROBLEM REPORT ASL2003:021 2003/02/12 ASL DCC Valerie Peyton ASL KMBO IU */* 2003,042,07:21:00 2003,042,10:30:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. The KMBO station operator was in the vault working on the STS1 Z during this time period. Data quality is compromised. END PROBLEM RESOLUTION REPORT ASL2003:021 2003/02/12 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The KMBO station operator left the vault at 2003, 042, 10:30. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2003:022 2003/02/13 ASL DCC Valerie Peyton ASL NWAO IU 10/*H* 2003,040,02:25:00 2003,040,06:00:00 Problem Description NOISE SEED COMMENT REFERENCE C 4410 Channel data quality is poor. There is some odd noise on the CMG3-T-B at NWAO. At this point in time, the station operator is working with a CTBTO crew to hook the CMG3-T-B into the CTBTO network. When the work is done, CMG3-T-B data will no longer be available under IU/NWAO. END PROBLEM RESOLUTION REPORT ASL2003:022 2003/07/31 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The data stream from the CMG3-T-B at IU/NWAO ended at 2003, 040, 06:00. As far as we know, the noise problem persisted past this time, but we have no way to know for sure. Now that this data stream has been entirely turned over to the CTBTO network, we are no longer receiving the data or able to affect data quality. END **************************************************************************** DATA PROBLEM REPORT ASL2003:027 2003/02/20 ASL DCC Valerie Peyton ASL NWAO IU 00/LDO 2003,040,04:00:00 2003,040,04:00:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE C 4215 Time uncertain; error less than 1 second. The manner in which Paroscientific microbarograph data are sampled introduces known, uncorrectable timing errors. Microbarograph data from a Paroscientific microbarograph are collected through a serial port, and not obtained via a proper digitizer. Once a second the system "requests" a data point from the microbarograph. The time stamp given each data point is the time at which the request for data point was made. There is no way to determine precisely when each data point was sampled. The timing error introduced by this sampling method is less than 1 second. END PROBLEM RESOLUTION REPORT ASL2003:027 2003/02/20 ASL DCC Valerie Peyton Description of Problem Resolution COMMENT As long as the Paroscientific microbarograph is attached to a serial port and not to a proper digitizing board, this timing ambiguity will remain. END **************************************************************************** DATA PROBLEM REPORT ASL2003:028 2003/02/20 ASL DCC Valerie Peyton ASL PAYG IU 00/LDO 2003,023,15:00:00 2003,023,15:00:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE C 4215 Time uncertain; error less than 1 second. The manner in which Paroscientific microbarograph data are sampled introduces known, uncorrectable timing errors. Microbarograph data from a Paroscientific microbarograph are collected through a serial port, and not obtained via a proper digitizer. Once a second the system "requests" a data point from the microbarograph. The time stamp given each data point is the time at which the request for data point was made. There is no way to determine precisely when each data point was sampled. The timing error introduced by this sampling method is less than 1 second. END PROBLEM RESOLUTION REPORT ASL2003:028 2003/02/20 ASL DCC Valerie Peyton Description of Problem Resolution COMMENT As long as the Paroscientific microbarograph is attached to a serial port and not to a proper digitizing board, this timing ambiguity will remain. END **************************************************************************** DATA PROBLEM REPORT ASL2003:025 2003/02/20 ASL DCC Valerie Peyton ASL KIP IU 00/LDO 2002,273,20:00:00 2002,273,20:00:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE C 4215 Time uncertain; error less than 1 second. The manner in which Paroscientific microbarograph data are sampled introduces known, uncorrectable timing errors. Microbarograph data from a Paroscientific microbarograph are collected through a serial port, and not obtained via a proper digitizer. Once a second the system "requests" a data point from the microbarograph. The time stamp given each data point is the time at which the request for data point was made. There is no way to determine precisely when each data point was sampled. The timing error introduced by this sampling method is less than 1 second. END PROBLEM RESOLUTION REPORT ASL2003:025 2003/02/20 ASL DCC Valerie Peyton Description of Problem Resolution COMMENT As long as the Paroscientific microbarograph is attached to a serial port and not to a proper digitizing board, this timing ambiguity will remain. END **************************************************************************** DATA PROBLEM REPORT ASL2003:026 2003/02/20 ASL DCC Valerie Peyton ASL KMBO IU 00/LDO 2003,042,08:00:00 2003,042,08:00:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE C 4215 Time uncertain; error less than 1 second. The manner in which Paroscientific microbarograph data are sampled introduces known, uncorrectable timing errors. Microbarograph data from a Paroscientific microbarograph are collected through a serial port, and not obtained via a proper digitizer. Once a second the system "requests" a data point from the microbarograph. The time stamp given each data point is the time at which the request for data point was made. There is no way to determine precisely when each data point was sampled. The timing error introduced by this sampling method is less than 1 second. END PROBLEM RESOLUTION REPORT ASL2003:026 2003/02/20 ASL DCC Valerie Peyton Description of Problem Resolution COMMENT As long as the Paroscientific microbarograph is attached to a serial port and not to a proper digitizing board, this timing ambiguity will remain. END **************************************************************************** DATA PROBLEM REPORT ASL2003:052 2003/03/26 ASL DCC Tyler Storm ASL BGCA GT * 1994,202,00:00:00 1998,297,00:00:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 526 Intrinsic Quanterra Timing Problem. These data have a timing error of up to -.688 seconds depending on the specific channels. The errors are due to an incorrect applied timing correction within the digitizing unit. For more information on the problem, please see announcement on GSN timing errors (http://aslwww.cr.usgs.gov/Seismic_Data/timing.html). END PROBLEM RESOLUTION REPORT ASL2003:052 2003/03/26 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION The problem was fixed with the software upgrade. END **************************************************************************** DATA PROBLEM REPORT ASL2003:053 2003/03/26 ASL DCC Tyler Storm ASL BOSA GT * 1993,057,00:00:00 1998,232,00:00:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 526 Intrinsic Quanterra Timing Problem. These data have a timing error of up to -.688 seconds depending on the specific channels. The errors are due to an incorrect applied timing correction within the digitizing unit. For more information on the problem, please see announcement on GSN timing errors (http://aslwww.cr.usgs.gov/Seismic_Data/timing.html). END PROBLEM RESOLUTION REPORT ASL2003:053 2003/03/26 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION The problem was fixed with the software upgrade. END **************************************************************************** DATA PROBLEM REPORT ASL2003:050 2003/03/20 ASL DCC Valerie Peyton ASL CASY IU */* 2002,133,00:00:00 2003,097,01:00:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 452 Timing IS in error, as clock is unlocked. There is a problem with the GPS system at CASY. The station is not able to lock onto the GPS timing standard, and data time stamps are consequently incorrect. We are investigating the problem but will likely be unable to solve it until the next Antarctic summer begins around October 2003. END PROBLEM RESOLUTION REPORT ASL2003:050 2004/04/30 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION In the process of fixing an unrelated problem in early April, 2003, the CASY station operator was able to solve the problem with the GPS system. Data time stamps are correct once more as of 2003, 097, 01:00. END **************************************************************************** DATA PROBLEM REPORT ASL2003:051 2003/03/26 ASL DCC Tyler Storm ASL BDFB GT * 1993,203,00:00:00 1998,237,00:00:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 526 Intrinsic Quanterra Timing Problem. These data have a timing error of up to -.688 seconds depending on the specific channels. The errors are due to incorrect applied timing corrections within the digitizing unit. For more information on the problem, please see announcement on GSN timing errors (http://aslwww.cr.usgs.gov/Seismic_Data/timing.html). END PROBLEM RESOLUTION REPORT ASL2003:051 2003/03/26 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION The problem was fixed with the software upgrade. END **************************************************************************** DATA PROBLEM REPORT ASL2003:056 2003/03/26 ASL DCC Tyler Storm ASL DBIC GT * 1994,168,00:00:00 1998,227,00:00:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 526 Intrinsic Quanterra Timing Problem. These data have a timing error of up to -.688 seconds depending on the specific channels. The errors are due to an incorrect applied timing correction within the digitizing unit. For more information on the problem, please see announcement on GSN timing errors (http://aslwww.cr.usgs.gov/Seismic_Data/timing.html). END PROBLEM RESOLUTION REPORT ASL2003:056 2003/03/26 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION The problem was fixed with the software upgrade. END **************************************************************************** DATA PROBLEM REPORT IDA2013:002 2013/03/07 IDA DCC Erik Klimczak IDA COCO II BH*-10 2013,054,00:00:00 2013,054,00:00:00 Problem Description OTHER The STS-2 seismometer, digitizer, and other equipment in the secondary vault have been damaged by flooding of the vault. Data acquisition from the COCO-10 digitizer ceased on day 2013,054-04:39. END **************************************************************************** DATA PROBLEM REPORT ASL2003:057 2003/03/26 ASL DCC Tyler Storm ASL LBTB GT * 1993,107,00:00:00 1998,236,00:00:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 526 Intrinsic Quanterra Timing Problem. These data have a timing error of up to -.688 seconds depending on the specific channels. The errors are due to an incorrect applied timing correction within the digitizing unit. For more information on the problem, please see announcement on GSN timing errors (http://aslwww.cr.usgs.gov/Seismic_Data/timing.html). END PROBLEM RESOLUTION REPORT ASL2003:057 2003/03/26 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION The problem was fixed with the software upgrade. END **************************************************************************** DATA PROBLEM REPORT IDA2013:003 2013/03/07 IDA DCC Erik Klimczak IDA UOSS II *** 2013,054,00:00:00 2013,054,00:00:00 Problem Description OTHER IDA station UOSS is down as of day 2013,054-09:31 due to power problems at the station. IDA engineers are working with the station operator to resolve the power problems. END PROBLEM RESOLUTION REPORT IDA2013:003 2013/08/15 IDA Erik Klimczak Description of Problem Resolution RESOLUTION IDA station UOSS is back online as of day 2013,149-08:09 after an IDA engineer visited the station and upgraded the power system. The power system was converted from AC to DC power during the upgrade. END **************************************************************************** DATA PROBLEM REPORT ASL2003:054 2003/03/26 ASL DCC Tyler Storm ASL CPUP GT * 1994,202,00:00:00 1999,243,00:00:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 526 Intrinsic Quanterra Timing Problem. These data have a timing error of up to -.688 seconds depending on the specific channels. The errors are due to an incorrect applied timing correction within the digitizing unit. For more information on the problem, please see announcement on GSN timing errors (http://aslwww.cr.usgs.gov/Seismic_Data/timing.html). END PROBLEM RESOLUTION REPORT ASL2003:054 2003/03/26 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION The problem was fixed with the software upgrade. END **************************************************************************** DATA PROBLEM REPORT ASL2003:055 2003/03/26 ASL DCC Valerie Peyton ASL SNZO IU 10/*HN 2003,078,18:36:00 2003,084,21:45:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The N component of the CMG3-T at SNZO is mostly against the stop during this time period. Much of the data is unuseable; please use these data with caution. END PROBLEM RESOLUTION REPORT ASL2003:055 2003/03/26 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The SNZO station operator recentered the CMG3-T at 2003, 084, 21:45. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT IDA2013:001 2013/03/07 IDA DCC Erik Klimczak IDA MSVF II *** 2013,023,00:00:00 2013,023,00:00:00 Problem Description OTHER IDA station MSVF is down as of day 2013,023 due to GPS problems and communication problems with the digitizers. A trip to the station by an IDA engineer will be planned. END **************************************************************************** DATA PROBLEM REPORT ASL2003:058 2003/03/26 ASL DCC Tyler Storm ASL LPAZ GT * 1993,232,00:00:00 1998,273,00:00:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 526 Intrinsic Quanterra Timing Problem. These data have a timing error of up to -.688 seconds depending on the specific channels. The errors are due to an incorrect applied timing correction within the digitizing unit. For more information on the problem, please see announcement on GSN timing errors (http://aslwww.cr.usgs.gov/Seismic_Data/timing.html). END PROBLEM RESOLUTION REPORT ASL2003:058 2003/03/26 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION The problem was fixed with the software upgrade. END **************************************************************************** DATA PROBLEM REPORT ASL2003:059 2003/03/26 ASL DCC Tyler Storm ASL PLCA GT * 1994,310,00:00:00 1998,230,00:00:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 526 Intrinsic Quanterra Timing Problem. These data have a timing error of up to -.688 seconds depending on the specific channels. The errors are due to an incorrect applied timing correction within the digitizing unit. For more information on the problem, please see announcement on GSN timing errors (http://aslwww.cr.usgs.gov/Seismic_Data/timing.html). END PROBLEM RESOLUTION REPORT ASL2003:059 2003/03/26 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION The problem was fixed with the software upgrade. END **************************************************************************** DATA PROBLEM REPORT IDA2013:008 2013/05/01 IDA DCC Erik Klimczak IDA RAYN II *** 2013,079,00:00:00 2013,079,00:00:00 Problem Description OTHER IDA station RAYN is down as of day 2013,079 due to failure of the station computer and power problems at the station. A station visit by an IDA engineer is planned. END PROBLEM RESOLUTION REPORT IDA2013:008 2013/08/15 IDA Erik Klimczak Description of Problem Resolution RESOLUTION IDA station RAYN is back on-line as of day 2013,153 after an IDA engineer visited the station and upgraded the power system and replaced the station computer. END **************************************************************************** DATA PROBLEM REPORT IDA2013:009 2013/05/01 IDA DCC Erik Klimczak IDA NIL II BH*-00,LH*-00 2013,107,00:00:00 2013,107,00:00:00 Problem Description OTHER There is high background noise on the horizontal channels from the KS-54000 seismometer. The station operator reports heavy construction in the area that may be the source of this noise. END **************************************************************************** DATA PROBLEM REPORT ASL2003:041 2003/03/13 ASL DCC Valerie Peyton ASL DPC CZ * 2001,085,07:27:00 2001,086,06:25:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4105 Seismometer not connected to digitizer. It appears that the STS2 at DPC is not connected to the digitizer during this time span. Data are unusable. END PROBLEM RESOLUTION REPORT ASL2003:041 2003/03/13 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The DPC STS2 was reconnected and normal data acquisition resumed at 2001, 086, 06:25. The instrument still has a response problem after this time. Data quality is not yet normal. See ASL2000:016 for the full duration of the response problem. END **************************************************************************** DATA PROBLEM REPORT IDA2013:006 2013/04/05 IDA DCC Erik Klimczak IDA MSEY II BH2-10,LH2-10 2013,028,00:00:00 2013,028,00:00:00 Problem Description DEAD CHANNEL The East-West channels from the CMG-3T seismometer are non-seismic as of day 2013,022. The masses for the CMG-3T seismometer are against the stops and need to be re-centered. END **************************************************************************** DATA PROBLEM REPORT ASL2003:042 2003/03/13 ASL DCC Valerie Peyton ASL DPC CZ * 2001,096,07:00:00 2001,096,12:00:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. The DPC station operator is in the vault working on the STS2 at this time. Expect variable data quality and testing. END PROBLEM RESOLUTION REPORT ASL2003:042 2003/03/13 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The DPC station operator's vault work is done at 2001, 096, 12:00. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT IDA2013:007 2013/04/05 IDA DCC Erik Klimczak IDA MBAR II BH*-10,LH*-10 2013,072,00:00:00 2013,084,00:00:00 Problem Description OTHER All channels from the CMG-3T were intermittently non-seismic from day 2013,072 to 2013,084 due to the sensor becoming locked following power outages at the station. The channels were restored after the sensor was unlocked and re-centered once power was restored. END **************************************************************************** DATA PROBLEM REPORT IDA2013:004 2013/03/07 IDA DCC Erik Klimczak IDA NIL II *** 2013,065,00:00:00 2013,065,00:00:00 Problem Description OTHER IDA station NIL is down due to major equipment damages caused by flooding of the vault. Data acquisition ceased day 2013,065-06:17. END PROBLEM RESOLUTION REPORT IDA2013:004 2013/04/18 IDA Erik Klimczak Description of Problem Resolution RESOLUTION All channels from the Trillium 240 are seismic after the masses for the sensor were re-centered on day 2013,073-18:38. The KS-54000 channels are seismic as of day 2013,107-10:20 after the station operator repaired the seismometer interface box. END **************************************************************************** DATA PROBLEM REPORT ASL2003:040 2003/03/07 ASL DCC Valerie Peyton ASL KMBO IU */* 2003,066,07:19:00 2003,066,08:13:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. The KMBO station operator was in the vault during this time, repairing the STS1 Z component. Data quality on all channels is compromised. END PROBLEM RESOLUTION REPORT ASL2003:040 2003/03/07 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The KMBO station operator's vault visit lasted just under an hour. Data quality returns to normal at 2003, 066, 08:13. END **************************************************************************** DATA PROBLEM REPORT IDA2013:005 2013/04/05 IDA DCC Erik Klimczak IDA PALK II BH*-00,LH*-00 2013,066,00:00:00 2013,066,00:00:00 Problem Description OTHER All channels from the KS-54000 seismometer are non-seismic as of day 2013,066-07:12 due to faulty wiring to the sensor. END **************************************************************************** DATA PROBLEM REPORT ASL2003:045 2003/03/17 ASL DCC Valerie Peyton ASL WVT IU *HZ 2003,071,23:45:00 2003,090,08:53:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The Z component of the STS1 at WVT has fallen against the stop. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2003:045 2003/03/31 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The Z component of the STS1 at WVT came back to center of its own accord. Data quality returns to normal at 2003, 090, 08:53. END **************************************************************************** DATA PROBLEM REPORT ASL2003:046 2003/03/17 ASL DCC Valerie Peyton ASL MSKU IU 00/*HN 2002,161,14:00:00 2003,172,10:15:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The N component of the STS1 at MSKU is non-functional. Its feedback box is corroded through, and we're not sure if the mass is centered. Data are unuseable. We are working with the station operator to fix the problem. END PROBLEM RESOLUTION REPORT ASL2003:046 2003/06/23 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION ASL field engineers were able to repair the N channel of the STS1 during a station maintenance visit to MSKU. Except for a small problem with high-frequency noise, data quality of the STS1 N component returns to normal at 2003, 172, 10:15. For more information and for the full time span of the noise issue on the STS1 N component, please see ASL2003:140. END **************************************************************************** DATA PROBLEM REPORT ASL2003:043 2003/03/17 ASL DCC Tyler Storm ASL DAV IU 00/?HN 2003,014,07:25:00 2003,023,02:32:00 Problem Description OTHER SEED COMMENT REFERENCE C 4410 Channel data quality is poor. The data vary from degraded to unuseable during this time frame. END PROBLEM RESOLUTION REPORT ASL2003:043 2003/03/17 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION The STS-1 was re-centered 2003,023,02:32:00. END **************************************************************************** DATA PROBLEM REPORT IDA2013:011 2013/08/15 IDA DCC Erik Klimczak IDA KAPI II BH2-10,LH2-10 2013,172,00:00:00 2013,172,00:00:00 Problem Description OTHER The East-West channels from the CMG-3T sensor are showing an anomalously low response since the power system was upgraded on 2013,172. END **************************************************************************** DATA PROBLEM REPORT ASL2003:044 2003/03/17 ASL DCC Valerie Peyton ASL TIXI IU 00/*HZ 2003,075,05:40:00 2003,076,01:52:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The STS1 Z component at TIXI has lost mass capture. Data are not usable. END PROBLEM RESOLUTION REPORT ASL2003:044 2003/03/17 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The TIXI station operator recentered the STS1 Z component at 2003, 076, 01:52. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT IDA2013:012 2013/08/15 IDA DCC Erik Klimczak IDA NIL II BH*-00,LH*-00 2013,227,00:00:00 2013,227,00:00:00 Problem Description OTHER All channels from the KS-540000 seismometer are non-seismic as of day 2013,227-03:45 due to a damaged seismometer interface box. END **************************************************************************** DATA PROBLEM REPORT ASL2003:049 2003/03/20 ASL DCC Valerie Peyton ASL TIXI IU 00/*HZ 2003,079,02:26:00 2003,080,08:48:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The Z component of the STS1 at TIXI has fallen against one of its stops. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2003:049 2003/03/24 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION Instrument was reset at 2003,080,08:48. Data quality is back to normal. END **************************************************************************** DATA PROBLEM REPORT IDA2013:010 2013/08/15 IDA DCC Erik Klimczak IDA COCO II BH*-00,LH*-00 2013,148,00:00:00 2013,148,00:00:00 Problem Description DEAD CHANNEL All channels from the KS-54000 seismometer are non-seismic as of day 2013,148-14:00 following a large channel offset. END **************************************************************************** DATA PROBLEM REPORT ASL2003:047 2003/03/17 ASL DCC Valerie Peyton ASL MSKU IU 10/*HE 2002,175,09:00:00 2003,172,10:15:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The E component of the CMG3-T at MSKU is now dead. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2003:047 2003/06/23 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION ASL field engineers were able to repair the E channel of the CMG3-T during a station maintenance visit to MSKU. Data quality returns to normal at 2003, 172, 10:15. END **************************************************************************** DATA PROBLEM REPORT ASL2003:048 2003/03/17 ASL DCC Valerie Peyton ASL MSKU IU 00/*HE 2002,165,00:00:00 2003,172,10:15:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4620 Incorrect instrument response for low frequencies only The E component of the STS1 at MSKU is so close to one of its stops that the instrument response is corrupted for low frequencies. The frequencies affected vary from time to time, and can be at high as 1Hz. The high frequency data appear to be fine, although the amplitudes are sometimes suspiciously low. Data should be used with caution. END PROBLEM RESOLUTION REPORT ASL2003:048 2003/06/23 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION ASL field engineers were able to recenter the E channel of the STS1 during a station maintenance visit to MSKU. Data quality returns to normal at 2003, 172, 10:15. END **************************************************************************** DATA PROBLEM REPORT ASL2003:070 2003/04/07 ASL DCC Valerie Peyton ASL POHA IU 00/*H1 00/*H2 2003,029,01:58:00 2004,266,05:50:00 Problem Description SPIKES SEED COMMENT REFERENCE C 4510 Channel has frequent spiking. The horizontal components of the 54000 at POHA are displaying intermitant coherent spiking. The first occurrance appears to be at 2003, 029, 01:58. At that time the spikes are almost negligibly small in amplitude. The amplitude and frequency of the spiking increases with time. Most of the time the data needs to be low-passed to observe the spiking. The duration of spiking episodes varies from hours to days. Between spiking episodes, data quality is normal. The source of the spikes is as yet undetermined. Data should be used with caution. END PROBLEM RESOLUTION REPORT ASL2003:070 2004/11/26 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The POHA 54000 was pulled and repaired for reasons unrelated to the spiking. However, the repairs have solved the spiking problem as of 2004, 266, 05:50. END **************************************************************************** DATA PROBLEM REPORT ASL2003:071 2003/04/08 ASL DCC Valerie Peyton ASL ANMO IU 10/*HZ 2003,096,06:34:00 2003,097,19:19:00 Problem Description SPIKES SEED COMMENT REFERENCE C 4500 Channel has high noise background. The Z component of the CMG3-T-B at ANMO is exhibiting high levels of spiking or pulsing. The pulses vary in amplitude from a few hundred to several million counts, and are fairly broad in width. At times there is high frequency noise that is hard to see in the raw data (it is mostly covered by the pulsing) but is most evident in the PSDs. Noise levels are 5 to 50dB higher than they should be. We are investigating the problem. Data should only be used with caution. END PROBLEM RESOLUTION REPORT ASL2003:071 2003/04/08 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The noise problem on the Z component of the ANMO CMG3-T-B was solved by recentering the masses. Data quality returns to normal at 2003, 097, 19:19. END **************************************************************************** DATA PROBLEM REPORT ASL2003:074 2003/04/08 ASL DCC Valerie Peyton ASL MSKU IU 20/*N* 2002,338,16:47:00 2002,338,16:47:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The FBA23 at MSKU has a problem. Either the E component is "inventing" data, or the N and Z components are not registering properly. The problem is simply that some semblance of data intermittantly appears on the E component but not on the N and Z components. The other MSKU instruments are not working well enough to compare their data with the FBA23 and determine precisely which component is malfunctioning. At this point, we are considering all three FBA23 channels to be dead. END **************************************************************************** DATA PROBLEM REPORT ASL2003:075 2003/04/08 ASL DCC Tyler Storm ASL DAV IU * 1997,239,00:00:00 1999,365,00:00:00 Problem Description INCORRECT TIME These data are reported as mistimed (1 second late) in a residual analysis study by Professor Guy Masters (gmasters@ucsd.edu). END PROBLEM RESOLUTION REPORT ASL2003:075 2003/04/08 ASL DCC Tyler Storm Description of Problem Resolution COMMENT No further action required. END **************************************************************************** DATA PROBLEM REPORT ASL2003:072 2003/04/07 ASL DCC Valerie Peyton ASL FURI IU */* 2000,120,18:30:00 2003,113,13:30:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 454 Timing MAY be in error, as GPS system is not operating consistently. The GPS system is having intermittant problems locking onto the GPS signal. Timing is correct during some parts of the day and incorrect during other parts of the day. Data should be used with caution. Data users can check the SEED headers to verify correct timing. END PROBLEM RESOLUTION REPORT ASL2003:072 2003/05/01 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The FURI station operator replaced the faulty GPS system with a new one. Timing quality returns to normal at 2003, 113, 13:30. END **************************************************************************** DATA PROBLEM REPORT ASL2003:073 2003/04/07 ASL DCC Valerie Peyton ASL LSZ IU 20/*NN 2002,051,13:13:00 2002,051,13:13:00 Problem Description SPIKES SEED COMMENT REFERENCE C 4510 Channel has frequent spiking. The N component of the FBA23 is exhibiting excessive spiking. The spiking begins fairly low amplitude with low frequency of recurrance (only a few spikes per day). Over time the amplitude increases, as does the frequency of occurance. By early 2003, there are several spikes per hour. Data is not useable. We are investigating the cause of the problem. SUPPLEMENT 2003, 147 The FBA23 at LSZ was replaced with a new one at 2003, 141, 12:31. Data quality is much improved, but the spiking problem on the N component has not been eliminated. END **************************************************************************** DATA PROBLEM REPORT DMCQC2013:0079 2013/08/29 IRIS DMC Gillian Sharer DMC N56A TA * 2013,141,00:00:00 2013,143,17:22:00 Problem Description INCORRECT TIME From installation until 2013.143 17:33 UTC, the GPS clock at TA.N56A could not get a lock. The timing quality during this period is uncertain. END PROBLEM RESOLUTION REPORT DMCQC2013:0079 2013/08/29 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The GPS clock successfully locked after a service visit repaired the cable/connector. END **************************************************************************** DATA PROBLEM REPORT DMCQC2013:0075 2013/08/26 IRIS DMC Gillian Sharer DMC 157A TA * 2013,179,01:41:00 2013,179,14:05:00 Problem Description DEAD CHANNEL Data recorded at TA.157A was not seismic from 2013.179 01:41-14:05 UTC because its masses were locked. END PROBLEM RESOLUTION REPORT DMCQC2013:0075 2013/08/26 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION TA.157A began recording seismic data again on 2013.179 14:05 UTC after the masses were unlocked. END **************************************************************************** DATA PROBLEM REPORT DMCQC2013:0076 2013/08/26 IRIS DMC Gillian Sharer DMC F42A TA * 2013,130,15:45:00 2013,134,15:02:00 Problem Description DATA DROPOUTS TA.F42A data from 2013.130 15:45- 2013.134 15:02 UTC is unusable because of gaps caused by digitizer reboots. END PROBLEM RESOLUTION REPORT DMCQC2013:0076 2013/08/26 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The low power issue that caused the digitizer reboots resolved on 2013.134. END **************************************************************************** DATA PROBLEM REPORT DMCQC2013:0077 2013/08/26 IRIS DMC Gillian Sharer DMC W47A TA ?HZ 2013,156,03:35:00 2013,168,18:50:00 Problem Description DEAD CHANNEL On 2013.156 03:35 UTC, W47A.?HZ suddenly stopped recording seismic energy. During this time period, its spectra is flat. END PROBLEM RESOLUTION REPORT DMCQC2013:0077 2013/08/26 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION TA.W47A resumed recording normal data after the sensor was replaced on 2013.168 18:50 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2013:0078 2013/08/26 IRIS DMC Gillian Sharer DMC 658A TA ?H[NZ] 2013,181,23:38:00 2013,211,21:05:00 Problem Description OTHER During much of the time period 2013.181 23:38 - 2013.211 21:05 UTC, TA.658A.?HN was not recording seismic energy due to extremely large amplitude spiky noise, with counts in the millions. This noise was also seen on VM2 and mirrored on ?HZ with much smaller amplitude counts (cross-talk?). END **************************************************************************** DATA PROBLEM REPORT DMCQC2013:0071 2013/08/23 IRIS DMC Gillian Sharer DMC Q50A TA ?HZ 2013,136,04:34:00 2013,155,02:37:00 Problem Description OTHER From 2013.136-2013.155, TA.Q50A.?HZ had extreme spiky noise off and on that prevented the channel from recording seismic energy. The noise could be seen on the E/N channels also, but at much lower amplitudes. END PROBLEM RESOLUTION REPORT DMCQC2013:0071 2013/08/23 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The noise resolved itself spontaneously on 2013.155. A service visit on 2013.171 confirmed that the vault had water in it, and the sensor was replaced. END **************************************************************************** DATA PROBLEM REPORT DMCQC2013:0072 2013/08/23 IRIS DMC Gillian Sharer DMC Q55A TA ?HE 2013,143,12:44:00 2013,154,02:21:00 Problem Description INVALID RESPONSE On 2013.143 12:44 UTC, TA.Q55A.?HE experienced a partial loss of differential output with a sudden drop in dc offset of ~2500 counts and abnormally low amplitudes. END PROBLEM RESOLUTION REPORT DMCQC2013:0072 2013/08/23 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION TA.Q55A.?HE recovered its normal amplitudes and dc offset after a remote sensor power cycle on 2013.154 02:21 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2013:0073 2013/08/26 IRIS DMC Gillian Sharer DMC Y12C TA * 2013,162,18:36:00 2013,164,18:59:00 Problem Description DATA DROPOUTS TA.Y12C had over 200 gaps during this time period, due to digitizer reboots caused by power issues. END PROBLEM RESOLUTION REPORT DMCQC2013:0073 2013/08/26 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The problem was resolved after the battery and charger were replaced on 2013.164. END **************************************************************************** DATA PROBLEM REPORT DMCQC2013:0074 2013/08/23 IRIS DMC Gillian Sharer DMC N56A TA * 2013,164,10:45:00 2013,164,15:19:00 Problem Description OTHER TA.N56A did not record seismic data between 2013.164 10:45-15:19 UTC because VM2 and VM3 were against the stops at -12.8V. END PROBLEM RESOLUTION REPORT DMCQC2013:0074 2013/08/23 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION TA.N56A resumed recording seismic data after a mass recenter on 2013.164 15:19 UTC. END **************************************************************************** DATA PROBLEM REPORT ASL2003:078 2003/04/10 ASL DCC Tyler Storm ASL PET IU * 1994,185,00:00:00 1995,200,00:00:00 Problem Description INCORRECT TIME These data are reported as mistimed (1 second early) in a residual analysis study by Professor Guy Masters (gmasters@ucsd.edu). END PROBLEM RESOLUTION REPORT ASL2003:078 2003/04/10 ASL DCC Tyler Storm Description of Problem Resolution COMMENT No further action required. END **************************************************************************** DATA PROBLEM REPORT ASL2003:079 2003/04/10 ASL DCC Tyler Storm ASL RSNY RS * 1984,180,00:00:00 1988,001,00:00:00 Problem Description INCORRECT TIME These data are reported as mistimed (1 second early) in a residual analysis study by Professor Guy Masters (gmasters@ucsd.edu). END PROBLEM RESOLUTION REPORT ASL2003:079 2003/04/10 ASL DCC Tyler Storm Description of Problem Resolution COMMENT No further action required. END **************************************************************************** DATA PROBLEM REPORT ASL2003:076 2003/04/08 ASL DCC Tyler Storm ASL KIP IU * 1989,200,00:00:00 1994,075,00:00:00 Problem Description INCORRECT TIME These data are reported as mistimed ( 1 second early) in a residual analysis study by Professor Guy Masters (gmasters@ucsd.edu). END PROBLEM RESOLUTION REPORT ASL2003:076 2003/04/08 ASL DCC Tyler Storm Description of Problem Resolution COMMENT No further action required. END **************************************************************************** DATA PROBLEM REPORT DMCQC2013:0070 2013/08/23 IRIS DMC Gillian Sharer DMC L50A TA ?HE 2012,344,00:00:00 2013,057,00:00:00 Problem Description INVALID RESPONSE Amplitudes on TA.L50A.?HE were lower than expected since installation on 2012.344. Repeated pings on the U-element were also observed during this time period. END PROBLEM RESOLUTION REPORT DMCQC2013:0070 2013/08/23 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The problems were resolved after the sensor was replaced on 2013.056. END **************************************************************************** DATA PROBLEM REPORT ASL2003:077 2003/04/09 ASL DCC Valerie Peyton ASL ANMO IU 10/*H* 2003,098,18:02:00 2003,098,18:52:00 Problem Description OTHER SEED COMMENT REFERENCE C 1836 Instrument maintenance. Tests may be in progress. ASL field engineers were working on the ANMO CMG3-T-B at this time. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2003:077 2003/04/09 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The maintenance work on the ANMO CMG3-T-B lasted only 50 minutes. Data quality returns to normal at 2003, 098, 18:52. END **************************************************************************** DATA PROBLEM REPORT ASL2003:060 2003/03/26 ASL DCC Tyler Storm ASL SBA GT * 1993,363,00:00:00 1997,274,00:00:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 526 Intrinsic Quanterra Timing Problem. These data have a timing error of up to -.688 seconds depending on the specific channels. The errors are due to an incorrect applied timing correction within the digitizing unit. For more information on the problem, please see announcement on GSN timing errors (http://aslwww.cr.usgs.gov/Seismic_Data/timing.html). END PROBLEM RESOLUTION REPORT ASL2003:060 2003/03/26 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION The problem was fixed with the software upgrade. END **************************************************************************** DATA PROBLEM REPORT ASL2003:063 2003/03/31 ASL DCC Tyler Storm ASL WAKE IU 00/*HZ 2003,087,14:30:00 2005,154,05:45:00 Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE C 2008 Long period "burps". We see a pulse in the data on day 2003,084 and a higher low-frequency noise level afterwards. END PROBLEM RESOLUTION REPORT ASL2003:063 2005/06/03 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Instrument was resplaced with another KS54000. END **************************************************************************** DATA PROBLEM REPORT ASL2003:064 2003/04/02 ASL DCC Valerie Peyton ASL WVT IU *HZ 2003,091,20:55:00 2003,110,10:31:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The Z component of the STS1 at WVT has drifting swiftly towards one of the stops. It will likely be completely pegged soon. Data quality is compromised. END PROBLEM RESOLUTION REPORT ASL2003:064 2003/04/22 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The Z component of the STS1 at WVT has drifted back towards center. Data quality returns to normal at 2003, 110, 10:31. END **************************************************************************** DATA PROBLEM REPORT ASL2003:061 2003/03/26 ASL DCC Tyler Storm ASL VNDA GT * 1993,362,00:00:00 1998,307,00:00:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 526 Intrinsic Quanterra Timing Problem. These data have a timing error of up to -.688 seconds depending on the specific channels. The errors are due to an incorrect applied timing correction within the digitizing unit. For more information on the problem, please see announcement on GSN timing errors (http://aslwww.cr.usgs.gov/Seismic_Data/timing.html). END PROBLEM RESOLUTION REPORT ASL2003:061 2003/03/26 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION The problem was fixed with the software upgrade. END **************************************************************************** DATA PROBLEM REPORT ASL2003:062 2003/03/27 ASL DCC Valerie Peyton ASL COR IU */* 2003,080,02:00:00 2003,086,15:00:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 452 Timing IS in error, as clock is unlocked. The clock at COR is unlocked from the GPS timing standard. Timing is unreliable. Data should be used with caution. END PROBLEM RESOLUTION REPORT ASL2003:062 2003/03/27 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The COR station operator reset the system, and the clock was able once more to lock onto the GPS standard. Timing reliability returns to normal at 2003, 086, 15:00. END **************************************************************************** DATA PROBLEM REPORT DMCQC2013:0086 2013/08/30 IRIS DMC Gillian Sharer DMC TASL TA -- 2012,150,15:04:00 2012,157,12:10:00 Problem Description INVALID RESPONSE The TA.TASL.-- metadata does not accurately reflect the gain values for the time period 2012.150 15:04 - 2012.157 12:20 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2013:0087 2013/09/06 IRIS DMC Gillian Sharer DMC 957A TA * 2012,052,00:00:00 2012,069,15:40:00 Problem Description DEAD CHANNEL From installation until 2012.069, TA.957A had a malfunctioning digitizer resulting in large numbers of gaps and no seismic energy recorded. END PROBLEM RESOLUTION REPORT DMCQC2013:0087 2013/09/06 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION TA.957A began recording seismic data after the digitizer was replaced on 2012.069 15:40 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2013:0088 2013/09/06 IRIS DMC Gillian Sharer DMC Z52A TA * 2012,126,21:37:00 2012,127,21:17:00 Problem Description DEAD CHANNEL TA.Z52A.VM[123] suddenly came up against the stops on 2012.126 21:37 UTC and the station stopped recording seismic energy. END PROBLEM RESOLUTION REPORT DMCQC2013:0088 2013/09/06 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION TA.Z52A recovered normal operation after a mass recenter on 2012.127 21:17 UTC. END **************************************************************************** DATA PROBLEM REPORT HRV2001:001 2001/03/29 Harvard WQC M. Nettles ASL TRQA IU * 2000,302,00:00:00 2000,302,00:00:00 Problem Description INCORRECT LOCATION Longitude should be -61.9795, not 61.9795. Elevation is incorrectly reported as 0.0 for the 00/?H? channels; should probably be 501.0 as for the 00/VK1 and 00/VE1 channels. END **************************************************************************** DATA PROBLEM REPORT DMCQC2013:0089 2013/09/09 IRIS DMC Gillian Sharer DMC Z52A TA ?H[EN] 2012,361,06:05:00 2012,361,18:55:00 Problem Description DEAD CHANNEL On 2012.361 06:05 UTC, TA.Z52A.VM[23] began rapidly drifting towards the stops, hitting them at 09:40 UTC. The ?H[EN] channels stopped recording seismic energy. END PROBLEM RESOLUTION REPORT DMCQC2013:0089 2013/09/09 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION TA.Z52A recovered normal operation after a mass recenter at 2012.361 18:55 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2013:0082 2014/07/25 IRIS DMC Gillian Sharer DMC 147A TA * 2013,129,16:25:00 2013,321,23:59:00 Problem Description DATA DROPOUTS Starting on 2013.129, TA.147A has had very large spiky noise on all three components with amplitude counts in the millions. For most of this time, the station has not been recording seismic energy. The station is scheduled for removal. END PROBLEM RESOLUTION REPORT DMCQC2013:0082 2014/07/25 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION TA.147A was removed on 2013.321. The removal report noted water in the vault and heavy corrosion of the electronics. END **************************************************************************** DATA PROBLEM REPORT DMCQC2013:0083 2013/08/30 IRIS DMC Gillian Sharer DMC I03D TA ?HZ 2013,157,06:22:00 2013,205,18:00:00 Problem Description LOW FREQUENCY NOISE Starting on 2013.157 06:22, TA.I03D.?HZ had excessive levels of spiky noise that rendered the channel effectively unable to record seismic energy. END PROBLEM RESOLUTION REPORT DMCQC2013:0083 2013/08/30 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The sensor was replaced on 2013.205 18:00 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2013:0084 2013/08/30 IRIS DMC Gillian Sharer DMC I03D TA * 2013,205,18:00:00 2013,208,01:30:00 Problem Description DEAD CHANNEL No sensor was connected to TA.I03D from 2013.205 18:00 - 2013.208 01:30 UTC. The data is only digitizer noise. END PROBLEM RESOLUTION REPORT DMCQC2013:0084 2013/08/30 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION TA.I03D began recording seismic data again when a new sensor was installed on 2013.208. END **************************************************************************** DATA PROBLEM REPORT DMCQC2013:0085 2013/08/30 IRIS DMC Gillian Sharer DMC TASM TA -- 2012,150,15:04:00 2012,157,12:20:00 Problem Description INVALID RESPONSE The TA.TASM.-- metadata does not accurately reflect the gain values for the time period 2012.150 15:04 - 2012.157 12:20 UTC. END **************************************************************************** DATA PROBLEM REPORT ASL2003:067 2003/04/07 ASL DCC Tyler Storm ASL SSPA IU * 1994,335,00:00:00 1997,091,00:00:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 526 Intrinsic Quanterra Timing Problem. These data have a timing error of up to -.688 seconds depending on the specific channels. The errors are due to an incorrect applied timing correction within the digitizing unit. For more information on the problem, please see announcement on GSN timing errors (http://aslwww.cr.usgs.gov/Seismic_Data/timing.html). END PROBLEM RESOLUTION REPORT ASL2003:067 2003/04/07 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION The problem was fixed with the software upgrade. END **************************************************************************** DATA PROBLEM REPORT ASL2003:068 2003/04/07 ASL DCC Tyler Storm ASL ANMO SR * 1976,001,00:00:00 1977,180,00:00:00 Problem Description INCORRECT TIME These data are reported as mistimed (1.7 seconds early) in a residual analysis study by Professor Guy Masters (gmasters@ucsd.edu). END PROBLEM RESOLUTION REPORT ASL2003:068 2003/04/07 ASL DCC Tyler Storm Description of Problem Resolution COMMENT No further action required. END **************************************************************************** DATA PROBLEM REPORT DMCQC2013:0080 2013/08/29 IRIS DMC Gillian Sharer DMC 147A TA ?HZ 2011,344,21:19:00 2012,019,17:13:00 Problem Description INVALID RESPONSE On 2011.344 21:19 UTC, TA.147A.?HZ experienced a partial loss of differential output with a sudden drop in DC offset of ~2500 counts and a decrease in amplitudes by ~50%. END PROBLEM RESOLUTION REPORT DMCQC2013:0080 2013/08/29 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION TA.147A.?HZ resumed recording normal amplitudes after the sensor was replaced on 2012.019 17:13 UTC. END **************************************************************************** DATA PROBLEM REPORT ASL2003:065 2003/04/02 ASL DCC Valerie Peyton ASL RSSD IU 00/*H1 00/*H2 2000,121,18:30:00 2000,230,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE C 4335 Horizontal inputs swapped (ie, 1 <=> 2) During this time period, the 1 and 2 components at RSSD were recorded under the wrong names (1 was recorded as 2, and 2 was recorded as 1). The dataless reflects this issue and corrects for it. END PROBLEM RESOLUTION REPORT ASL2003:065 2003/04/02 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Proper recording of the 1 and 2 components of the 54000 at RSSD resumed at 2000, 230. Again, the dataless reflects this return to normalcy. END **************************************************************************** DATA PROBLEM REPORT DMCQC2013:0081 2013/08/29 IRIS DMC Gillian Sharer DMC 147A TA ?HZ 2012,154,08:46:00 2012,244,18:05:00 Problem Description OTHER During the time period 2012.154-2012.244, TA.147A.?HZ had intermittent problems with extremely high amplitude noise on Z, lasting from a few hours to a few days at a time. There was water in the vault during this period. END **************************************************************************** DATA PROBLEM REPORT ASL2003:066 2003/04/07 ASL DCC Tyler Storm ASL HRV IU * 1988,001,00:00:00 1999,045,00:00:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 526 Intrinsic Quanterra Timing Problem. These data have a timing error of up to -.688 seconds depending on the specific channels. The errors are due to an incorrect applied timing correction within the digitizing unit. For more information on the problem, please see announcement on GSN timing errors (http://aslwww.cr.usgs.gov/Seismic_Data/timing.html). END PROBLEM RESOLUTION REPORT ASL2003:066 2003/04/07 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION The problem was fixed with the software upgrade. END **************************************************************************** DATA PROBLEM REPORT ASL2003:069 2003/04/07 ASL DCC Tyler Storm ASL ANMO SR * 1977,181,00:00:00 1978,365,00:00:00 Problem Description INCORRECT TIME These data are reported as mistimed (.3 seconds early) in a residual analysis study by Professor Guy Masters (gmasters@ucsd.edu). END PROBLEM RESOLUTION REPORT ASL2003:069 2003/04/07 ASL DCC Tyler Storm Description of Problem Resolution COMMENT No further action required. END **************************************************************************** DATA PROBLEM REPORT ASL2003:092 2003/04/29 ASL DCC Valerie Peyton ASL HRV IU *HN 2003,118,15:56:00 2003,119,10:17:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4625 Invalid instrument response. The N component of the STS1 at HRV has lost half of the double-ended output. The response is 25dB too low throughout the entire spectrum. END PROBLEM RESOLUTION REPORT ASL2003:092 2003/04/29 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The response of the N component of the STS1 at HRV returns to normal at 2003, 119, 10:17. END **************************************************************************** DATA PROBLEM REPORT DMCQC2015:0192 2015/04/14 IRIS DMC Gillian Sharer DMC 342B N4 ?HZ 2015,073,17:08:00 2015,075,17:26:00 Problem Description LOW FREQUENCY NOISE N4.342B.?HZ had sudden onset sensor noise at periods > 10 seconds starting on 2015.073 17:08 UTC. END PROBLEM RESOLUTION REPORT DMCQC2015:0192 2015/04/14 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The noise resolved after remote mass lock and unlock commands were sent on 2015.075 17:26 UTC. END **************************************************************************** DATA PROBLEM REPORT ASL2003:093 2003/04/30 ASL DCC Valerie Peyton ASL HRV IU *HN 2003,119,18:36:00 2003,129,19:40:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4625 Invalid instrument response. The N component of the STS1 at HRV has lost half of the double-ended output. The response is 25 to 30dB too low throughout the entire spectrum. END PROBLEM RESOLUTION REPORT ASL2003:093 2003/05/12 ASL DCC Tyler Storm Description of Problem Resolution COMMENT The channels are now dead. END **************************************************************************** DATA PROBLEM REPORT DMCQC2015:0193 2015/04/14 IRIS DMC Gillian Sharer DMC 342B N4 ?HZ 2015,087,10:15:00 2015,096,20:43:00 Problem Description LOW FREQUENCY NOISE N4.342B.?HZ had excessive sensor noise at periods > 10 seconds from 2015.087 10:15 UTC - 2015.096 20:43 UTC. END PROBLEM RESOLUTION REPORT DMCQC2015:0193 2015/04/14 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION After the masses were locked on 2015.096, the sensor was replaced on 2015.097. END **************************************************************************** DATA PROBLEM REPORT ASL2003:090 2003/04/22 ASL DCC Valerie Peyton ASL BJT IC */* 2002,314,05:45:00 2003,216,05:56:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 454 Timing MAY be in error, as GPS system is not operating consistently. The QVI board at BJT appears to be broken. Timing in the data is fine as long as the GPS system is working and locked onto the satellites. However, there are times when the GPS system is not locked on, and the broken QVI board prevents the system from maintaining accurate timing without a GPS lock. We cannot guarantee timing quality during the daily breaks in the GPS lock. By early 2003 the BJT clock was losing roughly 0.002 seconds per day. Whenever the system was without a GPS lock, the accumulated timing error was reflected in the time stamp on the data. END PROBLEM RESOLUTION REPORT ASL2003:090 2003/09/04 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The BJT station operator was able to replace the broken parts of the GPS system on 2003, 216. Timing data quality returns to normal at 2003, 216, 05:56. END **************************************************************************** DATA PROBLEM REPORT DMCQC2015:0190 2015/04/14 IRIS DMC Gillian Sharer DMC R53A N4 ?HZ 2015,058,03:00:00 2015,065,20:30:00 Problem Description LOW FREQUENCY NOISE N4.R53A.?HZ had excessive sensor noise at periods > 10 seconds starting on 2015.058 ~03:00 and gradually increasing over the course of several days. END PROBLEM RESOLUTION REPORT DMCQC2015:0190 2015/04/14 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The noise returned to normal levels after remote mass lock and unlock commands were sent to the sensor on 2015.065 20:30 UTC. END **************************************************************************** DATA PROBLEM REPORT ASL2003:091 2003/04/23 ASL DCC Valerie Peyton ASL PAB IU */* 2003,112,08:00:00 2003,116,10:45:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 452 Timing IS in error, as clock is unlocked. In an effort to stop the station alarm system from ringing, vandals severed the GPS antenna cable at PAB. This leaves us with an unlocked clock. We have shipped replacement parts, but until they are installed, timing will be unreliable. END PROBLEM RESOLUTION REPORT ASL2003:091 2003/05/15 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The PAB station operator was able to splice together the severed GPS antenna cable. Clock quality returns to normal at 2003, 116, 10:45. END **************************************************************************** DATA PROBLEM REPORT DMCQC2015:0191 2015/04/14 IRIS DMC Gillian Sharer DMC 342B N4 ?HZ 2014,356,18:45:00 2014,360,23:40:00 Problem Description LOW FREQUENCY NOISE N4.342B .?HZ experienced increased sensor noise at periods > 10 seconds starting on 2014.356 18:45 UTC. END PROBLEM RESOLUTION REPORT DMCQC2015:0191 2015/04/14 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The noise spontaneously resolved by 2014.360 23:40 UTC. END **************************************************************************** DATA PROBLEM REPORT ASL2003:096 2003/05/01 ASL DCC Valerie Peyton ASL TATO IU *LN *LE 10/*LN 10/*LE 10/*NN 10/*NE 1992,270,00:00:00 2002,001,00:00:00 Problem Description Problem Description CHANNEL ORIENTATION SEED COMMENT REFERENCE C 1826 Instrument orientation is unknown. At some point after installation of the TATO FBA23 the instrument became unbolted from the floor. Because of this, it was free to move in any direction during large earthquakes. When the problem was discovered, the instrument had rotated to at least 30 degrees east of north. We have attempted to determine the precise orientation of the instrument, but so far the task has proved impossible. All we can say is that until 2002, 108, 04:30 the orientation of the TATO FBA23 is unknown. END PROBLEM RESOLUTION REPORT ASL2003:096 2003/05/01 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION At 2002, 108, 04:30 the TATO FBA23 was bolted to the ground with the N component pointing to 0 degrees. From this point on the instrument's orientation is correct. END **************************************************************************** DATA PROBLEM REPORT ASL2003:097 2003/05/05 ASL DCC Valerie Peyton ASL KBS IU 00/*HN 2003,123,02:38:00 2003,143,12:54:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The N component of the STS1 at KBS has fallen against one of the stops. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2003:097 2003/06/27 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The KBS station operator was able to recenter the STS1 N component at 2003, 143, 12:54. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2003:094 2003/04/30 ASL DCC Valerie Peyton ASL TIXI IU 00/*HE 2003,119,01:33:00 2003,124,21:21:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4620 Incorrect instrument response for low frequencies only The E component of the STS1 at TIXI has a problem. It appears that the instrument is in free period mode, and possible also in 20 second mode. The instrument response is corrupt from 0.1 Hz down on into all of the lower frequencies. END PROBLEM RESOLUTION REPORT ASL2003:094 2003/05/05 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The response problem with the E component of the STS1 at TIXI ends at 2003, 124, 21:21. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2003:095 2003/05/01 ASL DCC Valerie Peyton ASL TATO IU *LN *LZ 10/*LN 10/*LZ 10/*NN 10/*NZ 1992,270,00:00:00 2002,001,00:00:00 Problem Description Problem Description OTHER SEED COMMENT REFERENCE C 4330 Vertical and north-south inputs swapped (ie, Z <=> N). The N and Z data wires in the TATO FBA23 cable were reversed from installation. This swapping of the Z and N wires was not taking into account in the labeling of recorded. Data recorded as Z are actually N data; data recorded as N are actually Z data. END PROBLEM RESOLUTION REPORT ASL2003:095 2003/05/01 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The problem with the swapped Z and N wires on the TATO FBA23 was discovered during a maintenance visit in 2002. The wires were placed in their proper configuration at 2002, 103, 04:30. From this time onward, Z data are recorded as Z, and N data are recorded as N. END **************************************************************************** DATA PROBLEM REPORT DMCQC2015:0198 2015/07/14 IRIS DMC Gillian Sharer DMC 146B N4 ?HZ 2015,115,18:05:00 2015,118,17:51:00 Problem Description INVALID RESPONS N4.146B experienced a loss of differential output on April 25, 2015 18:05 UTC, resulting in amplitudes that are approximately 50% of normal. END PROBLEM RESOLUTION REPORT DMCQC2015:0198 2015/07/14 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The sensor was power cycled on April 28, 2015 17:51 UTC and normal amplitudes were restored as a result. END **************************************************************************** DATA PROBLEM REPORT DMCQC2015:0199 2015/07/14 IRIS DMC Gillian Sharer DMC N62A N4 ?HZ 2015,174,09:36:00 2015,189,20:30:00 Problem Description OTHER On June 23 2015 09:36 UTC, N4.N62A .?HZ suddenly failed and started producing large amplitude (~1000000 counts) spiky noise. During this time period, N62A.?HZ was not recording seismic energy. END PROBLEM RESOLUTION REPORT DMCQC2015:0199 2015/07/14 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The station resumed normal data recording after the sensor was replaced on July 08 2015 ~20:30 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2013:0057 2013/03/25 IRIS DMC Gillian Sharer DMC 109C TA * 2012,260,21:28:00 2012,348,22:15:00 Problem Description TIME TEARS Rapid clock drift at TA.109C resulted in its Q330 resyncing itself at decreasing intervals from 2012.260 to 2012.348. By November 2012, this was occurring daily. Every resync is a data gap, and the timing is suspect. END PROBLEM RESOLUTION REPORT DMCQC2013:0057 2013/03/25 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The station resumed normal operation after the sensor and the Q330 were replaced on 2012.348 22:15 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2015:0196 2015/05/05 IRIS DMC Gillian Sharer DMC 857A TA * 2012,195,23:39:00 2012,203,20:10:00 Problem Description INCORRECT TIME TA.857A was hit by lightening on July 13, 2012 23:39 UTC, which damaged the GPS. It was not able to get an accurate lock. END PROBLEM RESOLUTION REPORT DMCQC2015:0196 2015/05/05 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The Q330 and GPS antenna were replaced on July 18, 2012 22:00 UTC, but the Q330 ran for a few hours and then stopped working. The next service visit on July 21, 2012 20:10 UTC replaced the VIE, baler and cables. At this point the GPS achieved a steady lock. END **************************************************************************** DATA PROBLEM REPORT DMCQC2013:0058 2013/03/25 IRIS DMC Gillian Sharer DMC 758A TA ?HE 2013,049,12:12:00 2013,051,18:30:00 Problem Description INVALID RESPONSE On 2013.049 12:12 UTC, the dc offset of TA.758A.?HE abruptly shifted by ~2500 counts and its amplitudes were reduced by approximately 1/2. The instrument response is not accurate during this time period. END PROBLEM RESOLUTION REPORT DMCQC2013:0058 2013/03/25 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION On 2013.051 18:30 UTC, the channel spontaneously recovered. The dc offset shifted back ~2500 counts and the station resumed recording normal amplitudes. END **************************************************************************** DATA PROBLEM REPORT DMCQC2015:0197 2015/05/08 IRIS DMC Gillian Sharer DMC 857A TA * 2012,203,20:10:00 2012,207,19:10:00 Problem Description INVALID RESPONS Following a lightning strike and a Q330 replacement, the sensor at TA.857A became stuck in a short period mode on 2012.203 20:10 UTC. During this time period its data is lacking in frequencies < 1 Hz. END PROBLEM RESOLUTION REPORT DMCQC2015:0197 2015/05/08 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The sensor was replaced on July 25, 2012 19:10 UTC and the station resumed normal data recording. END **************************************************************************** DATA PROBLEM REPORT DMCQC2013:0059 2013/03/25 IRIS DMC Gillian Sharer DMC X43A TA * 2013,077,18:20:00 2013,083,20:05:00 Problem Description INCORRECT TIME TA.X43A suddenly lost its GPS clock on 2013.077. Timing after ~18:20 UTC is suspect. END PROBLEM RESOLUTION REPORT DMCQC2013:0059 2013/03/25 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION Correct time was restored on 2013.083 after the GPS antenna was replaced. The old antenna had been damaged, possibly by wind. END **************************************************************************** DATA PROBLEM REPORT DMCQC2015:0194 2015/05/05 IRIS DMC Gillian Sharer DMC L27K TA * 2015,100,13:34:00 2015,108,23:46:00 Problem Description INCORRECT TIME The GPS clock at TA.L27K failed to lock from 2015.100 13:34 UTC - 2015.108 23:46 UTC. Timing may or may not have drifted during this period. END PROBLEM RESOLUTION REPORT DMCQC2015:0194 2015/05/05 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The GPS antenna and cable were replaced, restoring the clock lock. END **************************************************************************** DATA PROBLEM REPORT DMCQC2015:0195 2015/05/08 IRIS DMC Gillian Sharer DMC 857A TA * 2012,195,22:39:00 2012,197,23:56:00 Problem Description DEAD CHANNEL TA.857A was struck by lightening on 2012.195 22:39 UTC which caused the seismic channels to flatline. END PROBLEM RESOLUTION REPORT DMCQC2015:0195 2015/05/08 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION Seismic data returned after the station was rebooted. The Q330 and GPS sustained damage however. END **************************************************************************** DATA PROBLEM REPORT DMCQC2013:0053 2013/03/08 IRIS DMC Gillian Sharer DMC Z44A TA * 2013,015,14:30:00 2013,017,18:51:00 Problem Description DEAD CHANNEL TA.Z44A abruptly stopped communicating on 2012.335 09:45 UTC. When it returned on 2013.015 14:30 UTC, the channels were not recording seismic energy and the GPS receiver was not functioning. END PROBLEM RESOLUTION REPORT DMCQC2013:0053 2013/03/08 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION Communication was lost again on 2013.017 18:51 UTC. The station was decommissioned on 2013.035 and all equipment removed. END **************************************************************************** DATA PROBLEM REPORT DMCQC2013:0054 2013/03/12 IRIS DMC Peggy Johnson DMC N52A TA ?HN 2013,015,00:00:00 2013,052,2100:00:00 Problem Description LOW FREQUENCY NOISE N noisier than E. END PROBLEM RESOLUTION REPORT DMCQC2013:0054 2013/03/12 IRIS DMC Peggy Johnson Description of Problem Resolution RESOLUTION Some improvement following replacement of sensor d 052. END **************************************************************************** DATA PROBLEM REPORT DMCQC2013:0055 2013/03/20 IRIS DMC Gillian Sharer DMC TOLK TA VM6 01/?HE 2013,024,23:35:00 2013,045,20:09:00 Problem Description DEAD CHANNEL Sometime between 2013.024 23:35 UTC and 2013.025 21:14 UTC, TA.TOLK..VM6 came up against the stops and 01.?HE stopped recording seismic energy. Additionally, the data from TOLK has multiple gaps during this time period, due to power issues. END PROBLEM RESOLUTION REPORT DMCQC2013:0055 2013/03/20 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION Adequate power was re-established on 2013.044, and VM6/01.?HE returned to normal values after a mass recenter on 2013.045 20:09 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2013:0056 2013/03/22 IRIS DMC Gillian Sharer DMC Q55A TA ?HE 2012,352,00:00:00 2013,008,15:18:00 Problem Description INVALID RESPONSE Starting at installation, TA.Q55A.?HE had abnormally low amplitudes (approximately half of expected) accompanied by a dc offset of ~2500 counts. END PROBLEM RESOLUTION REPORT DMCQC2013:0056 2013/03/22 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION On 2013.008, TA.Q55A.?HE spontaneously recovered normal amplitudes after a mass recenter at 15:18 UTC, which also shifted the dc offset to ~0 counts. END **************************************************************************** DATA PROBLEM REPORT DMCQC2013:0050 2013/03/08 IRIS DMC Gillian Sharer DMC T44A TA * 2013,022,07:36:00 2013,047,20:15:00 Problem Description DEAD CHANNEL On 2013.022 07:36 UTC, all channels of TA.T44A abruptly stopped recording seismic energy and returned junk noise instead. END PROBLEM RESOLUTION REPORT DMCQC2013:0050 2013/03/08 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION TA.T44A resumed normal data collection after the sensor was replaced on 2013.047 20:15 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2013:0051 2013/03/08 IRIS DMC Gillian Sharer DMC Z42A TA * 2012,364,11:00:00 2013,035,22:00:00 Problem Description INCORRECT TIME TA.Z42A lost its GPS on 2012.364. Data after ~11:00 UTC are likely to have incorrect timing. END PROBLEM RESOLUTION REPORT DMCQC2013:0051 2013/03/08 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION TA.Z42A was decommissioned on 2013.035 22:00 UTC, and all equipment removed. END **************************************************************************** DATA PROBLEM REPORT DMCQC2013:0052 2013/03/08 IRIS DMC Gillian Sharer DMC Z42A TA ?HZ 2012,364,00:40:00 2013,035,22:00:00 Problem Description DEAD CHANNEL TA.Z42A.?HZ stopped recording seismic energy on day 2012.364 00:40 UTC. END PROBLEM RESOLUTION REPORT DMCQC2013:0052 2013/03/08 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION TA.Z42A.?HZ returned junk noise until it was decommissioned on 2013.035 22:00 UTC. At that time all equipment was removed. END **************************************************************************** DATA PROBLEM REPORT ASL2003:098 2003/05/06 ASL DCC Valerie Peyton ASL ANMO IU 00/*H* 2003,125,15:59:00 2003,125,16:20:00 Problem Description OTHER SEED COMMENT REFERENCE C 1840 Calibration data A short calibration sequence was run on the 54000 borehole seismometer at ANMO during this time. END PROBLEM RESOLUTION REPORT ASL2003:098 2003/05/06 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The calibration sequence on the 54000 borehole seismometer at ANMO ended at 2003, 125, 16:20. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2003:099 2003/05/06 ASL DCC Valerie Peyton ASL RCBR IU 00/*H* 2003,125,18:37:00 2004,199,17:30:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. All three channels of the 54000 borehole seismometer at RCBR are currently recording digitizer noise. The station operator is reporting power problems at the station, and these may have prompted the seismometer problem. We are investigating. Meanwhile, data are not useable. END PROBLEM RESOLUTION REPORT ASL2003:099 2004/08/10 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The RCBR 54000 was repaired on site by an ASL field engineer. The instrument's power board was replaced and the 54000 was reinstalled. Data quality returns to normal at 2004, 199, 17:30. END **************************************************************************** DATA PROBLEM REPORT ASL2003:081 2003/04/10 ASL DCC Tyler Storm ASL RSON RS * 1984,185,00:00:00 1988,001,00:00:00 Problem Description INCORRECT TIME These data are reported as mistimed (1 second early) in a residual analysis study by Professor Guy Masters (gmasters@ucsd.edu). END PROBLEM RESOLUTION REPORT ASL2003:081 2003/04/10 ASL DCC Tyler Storm Description of Problem Resolution COMMENT No further action required. END **************************************************************************** DATA PROBLEM REPORT ASL2003:082 2003/04/10 ASL DCC Tyler Storm ASL RSCP RS * 1984,185,00:00:00 1988,001,00:00:00 Problem Description INCORRECT TIME These data are reported as mistimed (1 second early) in a residual analysis study by Professor Guy Masters (gmasters@ucsd.edu). END PROBLEM RESOLUTION REPORT ASL2003:082 2003/04/10 ASL DCC Tyler Storm Description of Problem Resolution COMMENT No further action required. END **************************************************************************** DATA PROBLEM REPORT ASL2003:080 2003/04/10 ASL DCC Tyler Storm ASL RSSD RS * 1984,173,00:00:00 1988,001,00:00:00 Problem Description INCORRECT TIME These data are reported as mistimed (1 second early) in a residual analysis study by Professor Guy Masters (gmasters@ucsd.edu). END PROBLEM RESOLUTION REPORT ASL2003:080 2003/04/10 ASL DCC Tyler Storm Description of Problem Resolution COMMENT No further action required. END **************************************************************************** DATA PROBLEM REPORT ASL2003:085 2003/04/14 ASL DCC Valerie Peyton ASL ANTO IU LL* HL* 10/*N* 1994,193,07:07:00 2006,285,11:33:00 Problem Description SPIKES SEED COMMENT REFERENCE C 4510 Channel has frequent spiking. All three channels of the FBA23 at ANTO show coherent spiking. When the instrument was first installed, the amplitude of the spikes was fairly low, and some events were recorded. By late 2002, the spiking amplitude was so high that it seemed no events would be large enough to be recorded over the spiking. Some events may still be recorded, but we cannot guarantee it. We are working on determining the source of the spiking. END PROBLEM RESOLUTION REPORT ASL2003:085 2006/10/16 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION We sent a new FBA23 cable with proper grounding in it to ANTO. The station operator replaced the old cable with the new one, which corrected the coherent noise problem. Data quality returns to normal at 2006, 285, 11:33. END **************************************************************************** DATA PROBLEM REPORT ASL2003:086 2003/04/16 ASL DCC Valerie Peyton ASL DWPF IU */* 2002,362,21:27:00 2003,084,22:58:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 454 Timing MAY be in error, as GPS system is not operating consistently. The GPS system at DWPF was not working properly during this time frame and the clock was drifting. The drift did not reach 0.1 seconds until 2003, 041. The maximum drift value was 0.21 seconds on 2003, 084. END PROBLEM RESOLUTION REPORT ASL2003:086 2003/04/16 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Just after the DWPF clock drift reached 0.21 seconds on 2003, 084, the station operator reset the system. After the system reset, timing returns to normal. END **************************************************************************** DATA PROBLEM REPORT ASL2003:083 2003/04/10 ASL DCC Tyler Storm ASL RSNT RS * 1984,180,00:00:00 1988,001,00:00:00 Problem Description INCORRECT TIME These data are reported as mistimed (1 second early) in a residual analysis study by Professor Guy Masters (gmasters@ucsd.edu). END PROBLEM RESOLUTION REPORT ASL2003:083 2003/04/10 ASL DCC Tyler Storm Description of Problem Resolution COMMENT No further action required. END **************************************************************************** DATA PROBLEM REPORT ASL2003:084 2003/04/10 ASL DCC Tyler Storm ASL TATO SR * 1976,091,00:00:00 1979,025,00:00:00 Problem Description INCORRECT TIME These data are reported as mistimed (1.5 seconds early) in a residual analysis study by Professor Guy Masters (gmasters@ucsd.edu). END PROBLEM RESOLUTION REPORT ASL2003:084 2003/04/10 ASL DCC Tyler Storm Description of Problem Resolution COMMENT No further action required. END **************************************************************************** DATA PROBLEM REPORT DMCQC2013:0068 2013/08/23 IRIS DMC Gillian Sharer DMC R55A TA ?HZ 2013,116,03:06:00 2013,133,15:44:00 Problem Description LOW FREQUENCY NOISE From 2013.116-2013.133, TA.R55A.?HZ had elevated noise at periods of greater than 10 seconds. The noise levels were most excessive from 2013.116 03:06 - 2013.119 00:33 UTC and from 2013.133 00:37 - 2013.133 15:44 UTC. END PROBLEM RESOLUTION REPORT DMCQC2013:0068 2013/08/23 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION Normal noise levels were restored after a remote lock/unlock of the masses at 2013.133 15:44 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2013:0069 2013/08/23 IRIS DMC Gillian Sharer DMC R55A TA ?HZ 2013,152,01:01:00 2013,163,03:52:00 Problem Description LOW FREQUENCY NOISE TA.R55A.?HZ experienced excessive noise at periods greater than 10 seconds from 2013.152 01:01 - 2013.163 03:52 UTC. END PROBLEM RESOLUTION REPORT DMCQC2013:0069 2013/08/23 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The noise issue resolved itself spontaneously at 2013.163 03:52 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2013:0064 2013/08/23 IRIS DMC Gillian Sharer DMC T58A TA ?HZ 2013,077,19:08:00 2013,088,21:00:00 Problem Description DEAD CHANNEL Due to a bad cable, TA.T58A.?HZ did not record seismic energy from 2013.077 19:08 - 2013.088 21:00 UTC. END PROBLEM RESOLUTION REPORT DMCQC2013:0064 2013/08/23 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The channel started recording seismic data after a service visit to replace the bad cable on 2013.088. END **************************************************************************** DATA PROBLEM REPORT DMCQC2013:0065 2013/08/23 IRIS DMC Gillian Sharer DMC W41B TA ?H[NE] 2013,094,13:08:00 2013,125,23:30:00 Problem Description OTHER On 2013.094 TA.W41B.?HE began to experience spiky broad spectrum noise, possibly corrosion related. By 2013.100, similar noise started on ?HN and both components stopped recording accurate seismic signal. END PROBLEM RESOLUTION REPORT DMCQC2013:0065 2013/08/23 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The problem was resolved by a sensor replacement on 2013.125. END **************************************************************************** DATA PROBLEM REPORT DMCQC2013:0066 2013/08/23 IRIS DMC Gillian Sharer DMC 158A TA ?HN 2013,055,00:00:00 2013,104,18:34:00 Problem Description INVALID RESPONSE From 2013.055-2013.104, TA.158A.?HN had amplitudes that were approximately half of the expected amplitude. END PROBLEM RESOLUTION REPORT DMCQC2013:0066 2013/08/23 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION After a power cycle of the sensor on 2013.104 18:34 UTC, 158A.?HN began recording with normal amplitude values. END **************************************************************************** DATA PROBLEM REPORT DMCQC2013:0067 2013/08/23 IRIS DMC Gillian Sharer DMC TAR55 TA ?HZ 2013,119,18:00:00 2013,119,23:08:00 Problem Description DEAD CHANNEL After a remote mass lock/unlock attempt on 2013.119 18:00 UTC, TA.R55A.VM1 pegged at 8.7V and R55A.?HZ stopped recording seismic energy. END PROBLEM RESOLUTION REPORT DMCQC2013:0067 2013/08/23 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION R55A returned to normal operation after a mass recenter at 2013.119 23:08 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2013:0060 2013/03/25 IRIS DMC Gillian Sharer DMC 343A TA * 2012,196,12:00:00 2012,251,19:00:00 Problem Description OTHER Beginning on 2012.196 12:00, TA.343A stopped recording accurate seismic data and the data became filled with spikes. By 2012.215, the mass channels were behaving extremely erratically and they would not respond to mass recenter attempts. END PROBLEM RESOLUTION REPORT DMCQC2013:0060 2013/03/25 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The sensor was replaced on 2012.251 19:00 UTC and the station resumed recording normal seismic data. END **************************************************************************** DATA PROBLEM REPORT DMCQC2013:0061 2013/03/25 IRIS DMC Gillian Sharer DMC Y58A TA * 2013,054,09:00:00 2013,055,06:30:00 Problem Description DEAD CHANNEL From installation until 2013.055 06:30 UTC, TA.Y58A masses were up against the stops and the station was non-seismic. END PROBLEM RESOLUTION REPORT DMCQC2013:0061 2013/03/25 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The station began recording seismic data after a mass recenter on 2013.055 06:30 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2013:0062 2013/03/25 IRIS DMC Gillian Sharer DMC Y51A TA ?HN 2013,058,01:45:00 2013,066,10:41:00 Problem Description LOW FREQUENCY NOISE TA.Y51A.?HN was severely compromised by large amplitude noise from 2013.058 01:45 UTC to 2013.066 10:41 UTC. END PROBLEM RESOLUTION REPORT DMCQC2013:0062 2013/03/25 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The noise spontaneously resolved on 2013.066 10:41 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2013:0063 2013/08/23 IRIS DMC Gillian Sharer DMC Y51A TA ?HN 2013,089,15:50:00 2013,099,23:17:00 Problem Description LOW FREQUENCY NOISE TA.Y51A.?HN was severely compromised by large amplitude noise from 2013.058 01:45 - 2013.092 16:22 UTC, and from 2013.093 17:00 - 2013.099 23:17 UTC. END PROBLEM RESOLUTION REPORT DMCQC2013:0063 2013/08/23 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION Y51A resumed recording normal data after the masses were remotely locked and unlocked on 2013.099. END **************************************************************************** DATA PROBLEM REPORT ASL2003:089 2003/04/22 ASL DCC Valerie Peyton ASL XAN IC */* 2003,053,04:35:00 2003,061,20:15:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 451 Timing MAY be in error, as clock is unlocked. The GPS system at XAN appears to have lost its lock on the GPS timing standard. Timing is unreliable for this time period. END PROBLEM RESOLUTION REPORT ASL2003:089 2003/04/22 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The GPS system at XAN returns to normal operation at 2003, 061, 20:15. Timing is once more reliable. END **************************************************************************** DATA PROBLEM REPORT ASL2003:087 2003/04/17 ASL DCC Valerie Peyton ASL HIA IC */* 1999,157,11:48:00 2003,224,10:05:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 454 Timing MAY be in error, as GPS system is not operating consistently. The QVI board at HIA appears to be broken. Timing in the data is fine as long as the GPS system is working and locked onto the satellites. However, there are times when the GPS system is not locked on, and the broken QVI board prevents the system from maintaining accurate timing without a GPS lock. We cannot guarantee timing quality during the daily breaks in the GPS lock. By early 2003 the HIA clock was losing roughly 0.6 seconds per day. Whenever the system was without a GPS lock, the accumulated timing error was reflected in the time stamp on the data. END PROBLEM RESOLUTION REPORT ASL2003:087 2003/09/25 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The HIA station operator replaced the GPS system. Data timing quality returns to normal at 2003, 224, 10:05. END **************************************************************************** DATA PROBLEM REPORT ASL2003:088 2003/04/22 ASL DCC Valerie Peyton ASL SBA IU 00/*HE 2003,111,13:05:00 2003,113,16:44:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The E component of the CMG3-T at SBA has fallen against the stop. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2003:088 2003/04/24 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION Instrument was recentered at 2003,113,16:44:00. END **************************************************************************** DATA PROBLEM REPORT DMCQC2015:0170 2015/01/09 IRIS DMC Gillian Sharer DMC D57A TA * 2014,238,02:40:00 2014,275,17:42:00 Problem Description DATA DROPOUTS TA.D57A started experiencing digitizer reboots twice daily on August 26, 2014. The resulting data gaps have an approximately 6 minute duration. END PROBLEM RESOLUTION REPORT DMCQC2015:0170 2015/01/09 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The digitizer at TA.D57A was replaced on October 2, resolving the issue of daily reboots. END **************************************************************************** DATA PROBLEM REPORT DMCQC2015:0171 2015/01/09 IRIS DMC Gillian Sharer DMC O57A TA [BL]HN 2014,307,04:50:00 2014,337,18:40:00 Problem Description INVALID RESPONSE On November 3, 2014 04:50 UTC the DC offset of TA.O57A.?HN suddenly changed by +3000 counts and its amplitudes decreased to ~50% of the expected amplitude. Then on November 16, 2014 15:33 UTC (2014.320), the DC offset suddenly dropped back to normal values but the amplitudes further decreased to ~10% of expected. END PROBLEM RESOLUTION REPORT DMCQC2015:0171 2015/01/09 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION TA.O57A's sensor was replaced on December 3 2014, and the station resumed recording normal data at ~18:40 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2015:0178 2015/02/03 IRIS DMC Gillian Sharer DMC H57A TA ?H? 2015,007,05:06:00 2015,026,09:31:00 Problem Description DEAD CHANNEL TA.H57A suddenly stopped recording seismic data on 2015.007 05:06 UTC. [BL]H[NEZ] channels returned digitizer noise during this time period. END PROBLEM RESOLUTION REPORT DMCQC2015:0178 2015/02/03 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION TA.H57A spontaneously started recording normal seismic data again on 2015.026 09:31 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2015:0179 2015/02/03 IRIS DMC Gillian Sharer DMC T47A N4 ?H? 2015,023,16:34:00 2015,027,20:00:00 Problem Description DEAD CHANNEL N4.T47A masses were locked on 2015.023 16:34 UTC. All seismic channels effectively returned digitizer noise during this time. END PROBLEM RESOLUTION REPORT DMCQC2015:0179 2015/02/03 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION N4.T47A resumed normal data recording after the sensor was replaced on 2015.027 ~20:00 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2015:0176 2015/01/29 IRIS DMC Gillian Sharer DMC T47A N4 ?HZ 2014,354,06:16:00 2015,027,20:00:00 Problem Description DEAD CHANNEL N4.T47A.?HZ experienced sudden onset sensor noise on 2014.354 06:16 UTC that effectively rendered it incapable of recording seismic energy. This noise continued until 2015.002 02:41 UTC when VM1 came up against the stops and N4.T47A began returning digitizer noise. The sensor would not respond to mass recenter attempts. END PROBLEM RESOLUTION REPORT DMCQC2015:0176 2015/01/29 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION N4.T47A resumed normal data recording after the sensor was replaced on 2015.027 ~20:00 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2015:0177 2015/02/03 IRIS DMC Gillian Sharer DMC E58A TA ?H? 2014,362,04:06:00 2015,031,15:20:00 Problem Description DATA LOGGER PROBLEM The Q330 at TA.E58A unexpectedly went into short period mode following a data gap which began on 2014.362 04:06 UTC. All seismic channels are lacking frequency content at periods greater than 1 second during this time period. END PROBLEM RESOLUTION REPORT DMCQC2015:0177 2015/02/03 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION TA.E58A resumed normal data recording after a remote mass recenter command was sent on 2015.031 15:17 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2015:0174 2015/01/09 IRIS DMC Gillian Sharer DMC W61A TA [BL]HZ 2014,255,06:38:00 2014,302,18:06:00 Problem Description OTHER On September 12, 2014 06:38 UTC, TA.W61A.?HZ began experiencing significant long period noise, possibly the result of corrosion in a leaky vault. On October 16, 2014 02:47 UTC, VM1 came up against the stops and the station stopped responding to mass recenter commands. END PROBLEM RESOLUTION REPORT DMCQC2015:0174 2015/01/09 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION TA.W61A resumed recording normal seismic data after the sensor was replaced on October 29, 2014 18:06 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2015:0175 2015/01/09 IRIS DMC Gillian Sharer DMC W61A TA [BL]HE 2014,280,01:53:00 2014,302,18:06:00 Problem Description OTHER On October 7, 2014 01:53 UTC, TA.W61A.?HE began experiencing significant long period noise, possibly the result of corrosion in a leaky vault. On October 17, 2014 03:44 UTC, VM3 first came up against the stops and kept returning there The station was not responding to mass recenter commands, and the E channel was not recording seismic energy during this time period. END PROBLEM RESOLUTION REPORT DMCQC2015:0175 2015/01/09 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION TA.W61A resumed recording normal seismic data after the sensor was replaced on October 29, 2014 18:06 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2015:0172 2015/01/09 IRIS DMC Gillian Sharer DMC 342B N4 [BHL]HN 2014,337,21:52:00 2014,341,20:36:00 Problem Description DEAD CHANNEL On 2014.337 21:52 UTC, N4.342B.?HN suddenly stopped recording seismic energy. The channel DC offset jumped to the millions of counts and the spectra was flat. END PROBLEM RESOLUTION REPORT DMCQC2015:0172 2015/01/09 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION N4.342B resumed recording normal seismic data after the sensor was replaced on December 7, 2014. END **************************************************************************** DATA PROBLEM REPORT DMCQC2015:0173 2015/02/03 IRIS DMC Gillian Sharer DMC 158A TA ?H[EN] 2014,323,22:04:00 2015,014,21:05:00 Problem Description DEAD CHANNEL On November 11, 2014 22:04 UTC, the E and N channels of TA.158A suddenly stopped recording seismic energy directly following a calibration pulse. The spectra is flat. END PROBLEM RESOLUTION REPORT DMCQC2015:0173 2015/02/03 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION Normal seismic data recording at 158A resumed after a remote mass recenter command was sent on January 14 21:02 UTC. END **************************************************************************** DATA PROBLEM REPORT HRV1995:039 1995/04/30 Harvard WQC Misha Salganik ASL CTAO IU LHN LHE 1994,299,23:47:00 1994,299,23:47:00 Problem Description LOW FREQUENCY NOISE Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:039 1995/05/25 ASL Tyler Storm Description of Problem Resolution Comment This type of coherent noise is usually caused by the pier tilting in some manner. Most likely, someone was in the vault at this time. No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT HRV1995:035 1995/03/09 Harvard WQC Misha Salganik ASL NWAO IU BHZ BHN 1994,274,16:35:00 1994,274,16:35:00 Problem Description DATA DROPOUTS Postscript file was placed into/pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:035 1995/06/29 ASL Tyler Storm Description of Problem Resolution Resolution Parts of the 20 sps channels did not transfer from the data acquisition portion of the system to the data processing end in this case. As a result, we see some gaps in the data. No further action wil be taken. END **************************************************************************** DATA PROBLEM REPORT HRV1995:036 1995/03/09 Harvard WQC Misha Salganik ASL SBA GT BH* LH* 1994,274,16:35:00 1994,274,16:35:00 Problem Description INCORRECT TIME The clock on the station is slow by 1 minute.Postscript file was placed into/pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:036 1995/05/25 ASL Tyler Storm Description of Problem Resolution Comment This is a very strange problem that I have observed at several stations. All off the streams from a certain component(s) will "die" while the remaining streams continue to record. I'm in the process of trying to find similarities in systems where this problem has been observed (hardware, software, etc.). If anyone has any ideas, I would like to hear them (Tyler Storm@asl.cr.usgs.gov). I will file a supplement report when(if) we locate the cause of the problem. END **************************************************************************** DATA PROBLEM REPORT HRV1995:037 1995/03/09 Harvard WQC Misha Salganik ASL SNZO IU BHN BHZ LHN LHZ 1994,283,21:06:00 1994,283,21:06:00 Problem Description DATA DROPOUTS Postscript file was placed into/pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:037 1995/05/25 ASL Tyler Storm Description of Problem Resolution Comment See Problem Resolution Report HRV1995:038. END **************************************************************************** DATA PROBLEM REPORT HRV1995:038 1995/04/23 Harvard WQC Misha Salganik SPYDER SNZO IU LHZ LHN 1994,113,05:08:00 1994,113,05:08:00 Problem Description DATA DROPOUTS The LHZ, LHN channels seem to be dead.Postscript file was placed into/pub/qc/qc_ ps. END PROBLEM RESOLUTION REPORT HRV1995:038 1995/05/25 ASL Tyler Storm Description of Problem Resolution Comment This is a very strange problem that I have observed at several stations. All off the streams from a certain component(s) will "die" while the remaining streams continue to record. I'm in the process of trying to find similarities in systems where this problem has been observed (hardware, software, etc.). If anyone has any ideas, I would like to hear them (Tyler Storm@asl.cr.usgs.gov). I will file a supplement report when(if) we locate the cause of the problem. END **************************************************************************** DATA PROBLEM REPORT HRV1995:031 1995/03/09 Harvard WQC Misha Salganik ASL DGR TS BH* LH* 1994,300,17:45:00 1994,300,17:45:00 1994,300,17:45:00 Problem Description OTHER Data gap on BHZ LHZ. Horizontal channels look strange.Postscript file was placed into/pub/qc/qc_ps END **************************************************************************** DATA PROBLEM REPORT HRV1995:032 1995/03/09 Harvard WQC Misha Salganik ASL DGR TS BHZ 1994,308,01:13:00 1994,308,01:13:00 Problem Description LOW FREQUENCY NOISE Postscript file was placed into/pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:032 2003/03/05 ASL Valerie Peyton Description of Problem Resolution COMMENT Station DGR appears to be in an area afflicted by high levels of low frequency background noise. However, the precise problem shown in the postscript file HRV95:032.ps cannot be found in the archived data for TS/DGR at 1994, 308 01:13. No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT HRV1995:033 1995/03/09 Harvard WQC Misha Salganik ASL HIA CD LHN LHE LHZ 1994,313,18:21:00 1994,313,18:21:00 Problem Description DATA GLITCHES Postscript file was placed into/pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:033 1995/05/25 ASL Tyler Storm Description of Problem Resolution Resolution These problems are caused by fluctuating power. No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT HRV1995:034 1995/03/09 Harvard WQC Misha Salganik ASL LPAZ GT BHN BHE 1994,300,17:45:00 1994,300,17:45:00 Problem Description HIGH FREQUENCY NOISE Postscript file was placed into/pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:034 1995/03/20 ASL Tyler Storm Description of Problem Resolution RESOLUTION The signal in question is a 1hz sine-wave calibration. END **************************************************************************** DATA PROBLEM REPORT HRV1995:030 1995/03/09 Harvard WQC Misha Salganik ASL GNI IU LH* BH* 1994,271,00:00:00 1994,319,00:00:00 Problem Description INCORRECT TIME The clock on the station is fast by 7 sec.Postscript file was placed into/pub/qc/qc_ps The start and end times were further refined from a residual analysis study by Professor Guy Masters (gmasters@ucsd.edu). END PROBLEM RESOLUTION REPORT HRV1995:030 2003/04/10 ASL DCC Tyler Storm Description of Problem Resolution COMMENT No further action required. END **************************************************************************** DATA PROBLEM REPORT DMCQC2015:0181 2015/05/08 IRIS DMC Gillian Sharer DMC M55A N4 ?H[NZ] 2014,346,02:30:00 2015,125,20:00:00 Problem Description OTHER Starting on 2014.346 N4.M55A.?H[NZ] started showing unusual spikes and pings. This behavior became worse in January 2015, and the N channel devolved into ratty, one-sided noise. The vault has a history of leaks, and this noise may be related to corrosion. END PROBLEM RESOLUTION REPORT DMCQC2015:0181 2015/05/08 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The sensor was replaced on May 5, 2015. END **************************************************************************** DATA PROBLEM REPORT DMCQC2015:0182 2015/04/03 IRIS DMC Gillian Sharer DMC TIGA TA ?H[NZE] 2015,023,18:20:00 2015,086,00:00:00 Problem Description OTHER On 2015.023 18:20 TIGA.?HZ started showing signs of ratty noise. Then on 2015.028, its dc offset plunged to -9500000 counts and the channel stopped recording seismic energy. On 2015.034, both VM2 and VM3 approached the stops and failed to respond to mass recenter commands. By this time, the N and E channels were also experiencing spiky, ratty noise. VM3 returned to normal levels on 2015.035; VM2 returned to normal levels on 2015.056. N and E seemingly recovered on 2015.056 ~13:30 UTC. Z gradually improved and as of 2015.082 its dc offset is normal and it is recording seismic data again. The pump was on during most of this time period. END **************************************************************************** DATA PROBLEM REPORT DMCQC2015:0180 2015/04/03 IRIS DMC Gillian Sharer DMC WHTX TA ?HZ 2015,025,17:35:00 2015,040,22:20:00 Problem Description OTHER From 2015.025-2015.040, TA.WHTX.?HZ showed ratty noise with spikes and sudden jumps in dc offset, most likely due to corrosion. END PROBLEM RESOLUTION REPORT DMCQC2015:0180 2015/04/03 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The sensor was replaced on February 9, 2015 22:20 UTC and the station resumed recording normal seismic data. The service visit noted that the vault was damp with condensation. END **************************************************************************** DATA PROBLEM REPORT DMCQC2015:0189 2015/04/14 IRIS DMC Gillian Sharer DMC TUL1 TA ?HZ 2015,081,15:42:00 2015,083,22:00:00 Problem Description DEAD CHANNEL On 2015.081 15:42 UTC, TA.TUL1.?HZ suddenly stopped recording seismic energy. Its DC offset dropped to -40000000 counts and its spectra became flat. END PROBLEM RESOLUTION REPORT DMCQC2015:0189 2015/04/14 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION TA.TUL1.?HZ began recording normal seismic data after its STS2 host box and Q330-to-STS2 cable were replaced on 2015.083 22:00 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2015:0187 2015/04/14 IRIS DMC Gillian Sharer DMC 146B N4 ?HE 2015,074,21:58:00 2015,099,22:00:00 Problem Description LOW FREQUENCY NOISE N4.146B.?HE showed increased noise at periods > 10 seconds, starting on 2015.074 21:58 UTC. The largest amplitudes occurred from 2015.076 05:51 UTC - 2015.084 03:39 UTC. END PROBLEM RESOLUTION REPORT DMCQC2015:0187 2015/04/14 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The sensor was replaced on 2015.099 ~22:00 UTC, which resolved the noise issue. END **************************************************************************** DATA PROBLEM REPORT DMCQC2015:0188 2015/04/14 IRIS DMC Gillian Sharer DMC W41B TA * 2014,146,12:26:00 2014,167,14:25:00 Problem Description INCORRECT TIME TA.W41B was without a GPS clock lock from 2014.0146 12:26 UTC - 2014.150 03:06 UTC and from 2014.155 01:04 UTC - 2014.167 14:25 UTC. Timing drift may or may not have occurred during these periods. END PROBLEM RESOLUTION REPORT DMCQC2015:0188 2015/04/14 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The GPS coaxial cable was at fault. The malfunctioning cable was replaced on 2014.167. END **************************************************************************** DATA PROBLEM REPORT DMCQC2015:0185 2015/07/14 IRIS DMC Gillian Sharer DMC L59A TA ?H? 2015,057,15:17:00 2015,127,16:23:00 Problem Description OTHER TA.L59A stopped responding to mass recenter commands on 2015.057 15:17 UTC. VM1 continued to drift towards the stops, hitting them on 2015.071 12:33 UTC. Shortly after, the E and Z channels saw their DC offset soar to the millions of counts. END PROBLEM RESOLUTION REPORT DMCQC2015:0185 2015/07/14 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION TA.L59A resumed normal operation on May 7 2015 16:23 UTC after a service visit that manually re-recentered the sensor. END **************************************************************************** DATA PROBLEM REPORT DMCQC2015:0186 2015/04/14 IRIS DMC Gillian Sharer DMC 342B N4 *H* 2015,096,20:43:00 2015,097,15:53:00 Problem Description DEAD CHANNEL The N4.342B masses were locked from 2015.096 20:43-2015.097 15:53 UTC. The station was not recording seismic energy during this time. END PROBLEM RESOLUTION REPORT DMCQC2015:0186 2015/04/14 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The station resumed normal data recording after the sensor was replaced on 2015.097 15:53 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2015:0183 2015/04/03 IRIS DMC Gillian Sharer DMC X58A N4 ?H? 2015,026,14:20:00 2015,050,17:00:00 Problem Description DEAD CHANNEL During this time period, the power cable for the seismic sensor was not plugged in and the station returned digitizer noise. END PROBLEM RESOLUTION REPORT DMCQC2015:0183 2015/04/03 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION A service visit on 2015.050 fixed the cable issue. END **************************************************************************** DATA PROBLEM REPORT DMCQC2015:0184 2015/07/14 IRIS DMC Gillian Sharer DMC M58A TA ?HZ 2015,016,16:30:00 2015,133,18:40:00 Problem Description OTHER Starting on 2015.016, TA.M58A.?HZ has had increased noise most often at periods greater than 25 seconds. While this noise occurs at varying amplitudes, at times it is large enough to significantly impact the quality of seismic data and effectively render the channel incapable of recording seismic events. During these times, the noise is present across all periods. UPDATE: On March 9 2015 19:00 UTC, its masses stopped responding to remote mass recenter requests. Then on April 9 13:51 UTC, large spikes began occurring with amplitudes of ~7000000 counts. Finally, on April 16 2015 22:47 UTC, VM1 hit the stops and stayed there. END PROBLEM RESOLUTION REPORT DMCQC2015:0184 2015/07/14 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION TA.M58A resumed normal operation after the sensor was replaced on May 13 2015 ~18:40 UTC. END **************************************************************************** DATA PROBLEM REPORT HRV1995:028 1995/03/07 Harvard WQC Misha Salganik ASL AFI DW LHZ LHE LHN BHZ BHN BHE 1994,319,20:10:00 1994,319,20:10:00 Problem Description DATA DROPOUTS Postscript file was placed into/pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:028 1995/06/02 ASL Tyler Storm Description of Problem Resolution Comment This is yet another situation were we see a data gap between tape changes. Either the operator is stopping acquisition for a period of time between tape changes, or there is a problem with the software at the station. I will continue to look into the "gap" problem as a whole, but there will be no further action on this particular problem report. END **************************************************************************** DATA PROBLEM REPORT HRV1995:029 1995/03/07 Harvard WQC Misha Salganik ASL BRVK II BHZ 1994,304,11:48:00 1994,304,11:48:00 Problem Description LOW FREQUENCY NOISE Postscript file was placed into/pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:029 1995/03/16 IDA Peter Davis Description of Problem Resolution COMMENT The burst of low-frequency noise noted in this DPR began on 95,304,06:14 and lasted until 95,305,05:38. We have observed a number of such episodic bursts on the BRVK STS-1 Z sensor since it was first installed. All have similar duration and begin and end abruptly. Because the noise increases only on the vertical data channels and not the horizontals, we think the problem is caused by a malfunction in the vertical sensor's electronics. The instrument will be replaced next week. END **************************************************************************** DATA PROBLEM REPORT IDA00:006 2000/01/17 IDA DCC Peter Davis IDA KDAK II * 1999,315,18:41:00 1999,339,21:51:00 Problem Description OTHER The power conditioner attached to the thermoelectric generator, which supplies all power to the sensors and data logger, failed on 1999,315 and was replaced on 1999,339. Normal recording resumed at that time. END **************************************************************************** DATA PROBLEM REPORT HRV1995:024 1995/03/03 Harvard WQC Misha Salganik SPYDER BORG II LHZ LHN LHE 1995,000,50:04:03 1995,000,50:04:03 Problem Description DATA DROPOUTS Postscript file was placed into/pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:024 1995/03/08 IDA Peter Davis Description of Problem Resolution COMMENT IDA DCC records show that we did eventually receive the entire LH* streams from BORG including the data interval requested by SPYDER. The data request manager logs also show this request was fulfilled without anomaly, though that is clearly not the case. Unfortunately, due to the asynchronous nature of the NRTS system, it is impossible for us now, weeks later, to reconstruct the state of the disk loop when this request was received and thereby trace the source of the problem. END **************************************************************************** DATA PROBLEM REPORT HRV1995:025 1995/03/03 Harvard WQC Misha Salganik SPYDER CHTO IU LHZ LHN LHE 1995,000,54:05:19 1995,000,54:05:19 Problem Description DATA DROPOUTS Postscript file was placed into/pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:025 1995/06/27 ASL Tyler Storm Description of Problem Resolution Resolution The data is OK. The dropouts on the LH channels were apparently caused by transmission errors. I pulled the same time segments from our mass store, and the data looked fine. END **************************************************************************** DATA PROBLEM REPORT HRV1995:026 1995/03/03 Harvard WQC Misha Salganik SPYDER CHTO IU LHN 1995,000,56:21:54 1995,000,56:21:54 Problem Description LOW FREQUENCY NOISE Postscript file was placed into/pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:026 2000/10/02 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION I looked at the data from CHTO for this day, and found no problems with it. I wonder if perhaps something happened in data transfer or processing to corrupt the LHN data in the fashion that is seen in the postscript file HRV95:026.ps. The best way to test this would be to re-request the data and see if the problem is reproduceable elsewhere, as I've not been able to reproduce it here. END **************************************************************************** DATA PROBLEM REPORT HRV1995:027 1995/03/03 Harvard WQC Misha Salganik SPYDER TBT IU LHN 1995,000,54:21:03 1995,000,54:21:03 Problem Description LOW FREQUENCY NOISE Postscript file was placed into/pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:027 1995/04/20 ASL Tyler Storm Description of Problem Resolution Comment See Problem Resolution Report (Comment) HRV1994:054. END **************************************************************************** DATA PROBLEM REPORT HRV1995:021 1995/03/03 Harvard WQC Misha Salganik ASL SBA GT LHE LHZ 1994,264,19:31:00 1994,264,19:31:00 Problem Description DATA DROPOUTS Postscript file was placed into/pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:021 1995/06/02 ASL Tyler Storm Description of Problem Resolution Comment This is yet another situation were we see a data gap between tape changes. Either the operator is stopping acquisition for a period of time between tape changes, or there is a problem with the software at the station. I will continue to look into the "gap" problem as a whole, but there will be no further action on this particular problem report. END **************************************************************************** DATA PROBLEM REPORT HRV1995:022 1995/03/03 Harvard WQC Misha Salganik ASL SNZO IU VHZ 1994,270,23:04:00 1994,270,23:04:00 Problem Description DATA DROPOUTS Postscript file was placed into/pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:022 1995/06/02 ASL Tyler Storm Description of Problem Resolution Resolution This outage was caused by where the first VHZ packet was "built" after a two day outage. No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT HRV1995:023 2005/03/03 Harvard WQC Misha Salganik ASL SMTC TS BHE BHN BHZ 1994,271,16:39:00 1994,271,16:39:00 Problem Description OTHER Dead channels.Postscript file was placed into/pub/qc/qc_ps END **************************************************************************** DATA PROBLEM REPORT HRV1995:017 1995/03/03 Harvard WQC Misha Salganik ASL GLA TS *HZ 1994,264,20:55:00 1994,270,23:07:00 Problem Description OTHER SEED COMMENT REFERENCE C 4010 Channel is down. The channel is dead. Postscript file was placed into/pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:017 1995/05/25 ASL Tyler Storm Description of Problem Resolution Resolution The signal looks like some sort of a diagnostic test (either an "over-driven" sine wave, or maybe the signal was intended to be a square wave. No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT DMCQC2013:0097 2013/10/25 IRIS DMC Gillian Sharer DMC T25A TA ?HZ 2013,241,20:01:00 2013,255,07:33:00 Problem Description OTHER From 08/29/13 20:01 - 09/12/13 07:33 UTC, TA.T25A.?HZ experienced spiky noise and a jumpy dc offset that wandered to -130000 counts before recovering. END **************************************************************************** DATA PROBLEM REPORT HRV1995:018 1995/03/03 Harvard WQC Misha Salganik ASL GUMO IU LHZ LHN 1994,257,05:52:00 1994,257,05:52:00 Problem Description DATA DROPOUTS Postscript file was placed into/pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:018 1995/06/02 ASL Tyler Storm Description of Problem Resolution Resolution Different streams compress, and build packets at different rates. The "staggered" ending times on the LHZ and LHN streams is just the end of those data packets at the end of that particular data tape. However, all of the data streams on the next tape start up approximately ten hours after they had stopped on the previous tape. This results in data gaps on all of the channels. It appears that the station operator must have stopped acquisition (for some reason) during the tape change. No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT DMCQC2013:0098 2013/10/25 IRIS DMC Gillian Sharer DMC 859A TA ?HZ 2013,253,03:13:00 2013,257,01:00:00 Problem Description INVALID RESPONSE From 09/10/13 to 09/14/13, the TA.859A.?HZ DC offset made several sudden jumps between 1500 and 4000 counts. When the DC offset was at ~4000 counts its amplitudes were lower than expected, possibly indicating a problem with the differential output. END **************************************************************************** DATA PROBLEM REPORT HRV1995:019 1995/03/03 Harvard WQC Misha Salganik ASL NNA II LHZ LHN LHE 1994,269,21:31:00 1994,269,21:31:00 Problem Description DATA DROPOUTS Postscript file was placed into/pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:019 1995/03/08 IDA Peter Davis Description of Problem Resolution COMMENT IDA DCC records show that the following continuous data streams were sent to the DMC for station NNA, day 1994269: NNA 94:269-00:00 94:269-18:55 NNA 94:269-22:33 94:269-23:59 The reason for the data gap has been noted in DPR/PRR IDA1994:010. From the PostScript file HRV1995:019.ps, it is possible only to tell that a 100 second long segment of 3 NNA data streams relating to an event on 94/09/26 21:31:19.70 are being examined. Since we cannot read the beginning time of the displayed data, we can only infer that this segment begins after 22:33 when recording resumed, although this is somewhat long after the event to look at small windows around body phases. It is worth noting that one may often observe transient long period signals immediately after a data logger is turned back on following sustained maintenance of this sort. Examination of the raw field tape quality control plots shows this was indeed the case at NNA on 1994269. END **************************************************************************** DATA PROBLEM REPORT DMCQC2013:0099 2013/10/25 IRIS DMC Gillian Sharer DMC G61A TA * 2013,268,00:00:00 2013,278,07:26:00 Problem Description INCORRECT TIME From installation to 10/05/13 07:26 UTC, the GPS clock was not able to get a lock. Timing was off by minutes. END PROBLEM RESOLUTION REPORT DMCQC2013:0099 2013/10/25 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION Accurate timing was achieved on 2013.278 07:26 UTC after a service visit to plug in the GPS cable. END **************************************************************************** DATA PROBLEM REPORT HRV1995:013 1995/03/03 Harvard WQC Misha Salganik ASL AFI IU LHN LHE 1994,256,10:01:00 1994,256,10:01:00 Problem Description DATA GLITCHES Postscript file was placed into/pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:013 1995/05/16 ASL Tyler Storm Description of Problem Resolution Comment I think these pulses are being caused by the pier tilting in some manner. I do not know what could be acting on the pier to create this motion (it looks like one clean pulse, and then the amplitude decays back to normal background). END **************************************************************************** DATA PROBLEM REPORT DMCQC2013:0093 2013/10/25 IRIS DMC Gillian Sharer DMC 351A TA * 2013,152,11:51:00 2013,227,15:50:00 Problem Description OTHER On 2013.152, 351A.VM1 came up against the stops and its Z channel stopped recording seismic energy. On 2013.159 05:37 UTC VM2 came up against the stops, and on 2013.163 04:56 UTC VM3 hit the stops. All 3 channels recorded noise instead of ground motion until the station was closed on 2013.227. END **************************************************************************** DATA PROBLEM REPORT HRV1995:014 1995/03/03 Harvard WQC Misha Salganik ASL CCM IU VH? LH? 1994,257,11:45:00 1994,257,11:45:00 Problem Description DATA DROPOUTS Postscript file was placed into/pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:014 1995/05/25 ASL Tyler Storm Description of Problem Resolution Resolution Different streams compress, and build packets at different rates. What appears to be an outage on VHE is actually just the beginning of that record (it started later than the other two). Had the time window been earlier we most likely would have seen that the VHZ, and VHN channel started at different times as well. END **************************************************************************** DATA PROBLEM REPORT DMCQC2013:0094 2013/10/25 IRIS DMC Gillian Sharer DMC 435B TA * 2013,167,00:09:00 2013,177,22:14:00 Problem Description DEAD CHANNEL From 06/16/13 00:09 UTC to 06/26/13 22:14 UTC, TA.435B recorded digitizer noise on all 3 channels after a bad cable stopped energizing the sensor. END PROBLEM RESOLUTION REPORT DMCQC2013:0094 2013/10/25 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION TA.435B resumed recording seismic data after a service visit on 2013.177. END **************************************************************************** DATA PROBLEM REPORT DMCQC2013:0095 2013/10/25 IRIS DMC Gillian Sharer DMC 658A TA * 2013,238,23:07:00 2013,342,23:59:00 Problem Description OTHER TA.658A.?HN stopped recording seismic energy on 2013.238 23:07 UTC due to extremely large amplitude non-environmental noise. Possibly as a result to cross-talk, the Z and E channel are also impaired. END **************************************************************************** DATA PROBLEM REPORT HRV1995:016 1995/03/03 Harvard WQC Misha Salganik ASL CPUP GT LHN LHE 1994,266,11:08:00 1994,266,11:08:00 Problem Description DATA DROPOUTS Postscript file was placed into/pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:016 1995/06/02 ASL Tyler Storm Description of Problem Resolution Resolution Different streams compress, and build packets at different rates. What appears to be an outage on LHN and LHE is just the end of those data packets at the end of that particular data tape. No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT DMCQC2013:0096 2013/10/25 IRIS DMC Gillian Sharer DMC 658A TA ?H[NZ] 2012,196,06:33:00 2012,196,10:51:00 Problem Description LOW FREQUENCY NOISE From 07/14/12 06:33-10:51 UTC, TA.658A.?HN experienced extremely high amplitude noise on N, with counts in the millions. The noise spontaneously resolved. END **************************************************************************** DATA PROBLEM REPORT LDEO1999:12 1999/12/23 LAMONT-DOHERTY EARTH OBSERVATORY Jiakang Xie DMC KMI CD BHZ SHZ 1994,180,18:24:00 1994,180,18:24:00 Problem Description OTHER (GAIN ERROR) INSTRUMENT-CORRECTED AMPLITUDE SPECTRA FROM CHANNEL SHZ AND BHZ DO NOT MATCH They appear to be a factor of more than 8 off, after deconvolving the instrument response and looking at the Lg phase of the event on this day. This problem is similar to that reported in LDEO1999:08. END **************************************************************************** DATA PROBLEM REPORT LDEO1999:11 1999/12/03 LAMONT-DOHERTY EARTH OBSERVATORY LZH CD BHZ SHZ 1994,284,20:42:00 1994,284,21:22:00 Problem Description OTHER (GAIN ERROR) INSTRUMENT-CORRECTED AMPLITUDE SPECTRA FROM CHANNEL SHZ AND BHZ DO NOT MATCH The ground-motion spectra using SHZ and BHZ appear to mismatch between 1 - 5 hz. The mismatch appear to increase with frequency from 1 to 5 Hz. END **************************************************************************** DATA PROBLEM REPORT DMCQC2013:0090 2013/09/09 IRIS DMC Gillian Sharer DMC 859A TA ?HZ 2013,244,00:52:00 2013,246,23:00:00 Problem Description INVALID RESPONSE On 2013.244 00:52 UTC, TA.859A.?HZ experienced a sudden jump in DC offset of ~2500 counts along with a reduction in amplitude values of approximately 50% (possibly a differential output problem). END PROBLEM RESOLUTION REPORT DMCQC2013:0090 2013/09/09 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION TA.859A.?HZ DC offset and amplitude values spontaneously returned to normal by 2013.246 23:00 UTC. END **************************************************************************** DATA PROBLEM REPORT HRV1995:010 1995/02/06 Harvard WQC Misha Salganik ASL SDV IU ALL 1995,000,00:00:00 1995,000,00:00:00 Problem Description INCORRECT LOCATION ASL dataless seed volume contains wrong latitude (70.663 instead of -70.663) of the station. This error has been corrected in the more recent volume. END **************************************************************************** DATA PROBLEM REPORT DMCQC2013:0091 2013/09/09 IRIS DMC Gillian Sharer DMC G60A TA * 2013,241,18:50:00 2013,247,01:17:00 Problem Description OTHER From 2013.241 18:50 UTC to 2013.247 01:47 UTC, TA.G60A mass positions were unstable, hitting the stops several times and triggering 9 mass recenters. When the masses were against the stops, the seismic channels stopped recording accurate data. END PROBLEM RESOLUTION REPORT DMCQC2013:0091 2013/09/09 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The rate of mass drift improved after the mass recenter on 2013.247 01:47 UTC, and TA.G60A resumed normal operation. END **************************************************************************** DATA PROBLEM REPORT HRV1995:012 1995/01/12 Harvard WQC Misha Salganik SPYDER SSPA IU LHZ 1994,000,43:01:02 1994,000,43:01:02 Problem Description POLARITY REVERSED The polarity of LHZ channel is still reversed. Postscript file was placed into /pub/qc/qc_ps . END PROBLEM RESOLUTION REPORT HRV1995:012 1995/02/22 ASL Tyler Storm Description of Problem Resolution Resolution The polarity for SSPA vertical data is correct. However, I can see how the problem would still appear to be present if the user did not have the most current dataless SEED volume. In the future, I will add a statement to the DPRs to let the users know when the dataless SEED volume has been updated with the new information. Sorry for the confusion. END **************************************************************************** DATA PROBLEM REPORT DMCQC2013:0092 2013/10/25 IRIS DMC Gillian Sharer DMC Z56A TA ?HZ 2013,165,04:21:00 2013,241,23:18:00 Problem Description LOW FREQUENCY NOISE Between 06/14/13 04:21 and 08/29/13 23:18 UTC, TA.Z56A.?HZ had many instances of extremely large amplitude noise, possibly related to corrosion. This occurred on an intermittent basis, but greatly affected data quality during much of this time span. END PROBLEM RESOLUTION REPORT DMCQC2013:0092 2013/10/25 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The noise stopped after the sensor was replaced on 2013.241. END **************************************************************************** DATA PROBLEM REPORT HRV1995:006 1995/01/31 Harvard WQC Misha Salganik SPYDER LPAZ GT LHZ LHN LHE 1995,016,18:14:00 1995,016,18:14:00 Problem Description DATA DROPOUTS Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:006 1995/02/02 ASL Tyler Storm Description of Problem Resolution RESOLUTION See PROBLEM RESOLUTION REPORT HRV1994:052. END **************************************************************************** DATA PROBLEM REPORT HRV1995:007 1995/01/31 Harvard WQC Misha Salganik ASL LZH CD LHZ 1994,231,02:51:00 1994,231,02:51:00 Problem Description DATA GLITCHES Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:007 1995/07/15 ASL Tyler Storm Description of Problem Resolution COMMENT It could be a power problem, or a number of other things. The original CDSN network is getting old. The Chinese, and the technician on site are doing what they can to keep the older stations operating until they can be upgraded. We will just have to live with it until the upgrades. No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT HRV1995:008 1995/01/31 Harvard WQC Misha Salganik SPYDER VNDA GT LHZ LHN LHE 1995,000,16:18:14 1995,000,16:18:14 Problem Description DATA DROPOUTS Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:008 1995/02/02 ASL Tyler Storm Description of Problem Resolution Resolution See PROBLEM RESOLUTION REPORT HRV1994:052. END **************************************************************************** DATA PROBLEM REPORT HRV1995:009 1995/01/31 Harvard WQC Misha Salganik ASL CCM IU VH? LH? BH? 1994,242,17:44:00 1994,242,17:44:00 Problem Description DATA DROPOUTS There is a large gap in the recordings for this particular day. END PROBLEM RESOLUTION REPORT HRV1995:009 1995/02/02 ASL Tyler Storm Description of Problem Resolution Comment I don't know what caused the dropouts. See PROBLEM RESOLUTION REPORT HRV1995:004 for more detail. No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT HRV1995:002 1995/01/31 Harvard WQC Misha Salganik ASL BOCO IU BHE LHN 1994,217,19:41:00 1994,217,19:41:00 Problem Description DATA DROPOUTS Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:002 1995/02/02 ASL Tyler Storm Description of Problem Resolution Comment I don't know what caused the dropouts. See PROBLEM RESOLUTION REPORT HRV1995:004 for more detail. No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT HRV1995:003 1995/01/31 Harvard WQC Misha Salganik SPYDER BOSA GT LHZ LHN LHE 1995,000,17:16:54 1995,000,17:16:54 Problem Description DATA DROPOUTS Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:003 1995/02/02 ASL Tyler Storm Description of Problem Resolution Resolution See PROBLEM RESOLUTION REPORT HRV1994:052. END **************************************************************************** DATA PROBLEM REPORT HRV1995:004 1995/01/31 Harvard WQC Misha Salganik SPYDER CHTO IU LHZ 1995,000,19:15:05 1995,000,19:15:05 Problem Description DATA DROPOUTS This may be a problem with the transmission of the dial up data. END PROBLEM RESOLUTION REPORT HRV1995:004 1995/02/02 ASL Tyler Storm Description of Problem Resolution COMMENT Yes, it is possible that the data dropouts were caused by a problem with the transmission of the dial up data. I will not know for sure until the tape arrives at ASL. If there is a data gap when the tape comes in, there is nothing we can do at this point other than to acknowledge the error. We are looking into patterns of data gaps to try to determine what happens, and how to solve it. Presently, we have not found any simple explanations or solution. We will continue to pursue the problem in general, but no further action will be taken for this particular problem report. SUPPLEMENT The data holdings show that all the data are available for this day; the data dropouts were indeed simply a problem with the dialup data. END **************************************************************************** DATA PROBLEM REPORT HRV1995:005 1995/01/31 Harvard WQC Misha Salganik ASL GRFO IU LHZ 1994,230,06:39:00 1994,230,10:31:00 Problem Description DATA DROPOUTS There record has a short gap. END PROBLEM RESOLUTION REPORT HRV1995:005 1995/02/02 ASL Tyler Storm Description of Problem Resolution COMMENT I don't know what caused the dropouts. See PROBLEM RESOLUTION REPORT HRV95:004 for more detail. No further action will be taken. SUPPLEMENT The current data holdings show that this data gap was later filled. END **************************************************************************** DATA PROBLEM REPORT HRV1995:001 1995/01/31 Harvard WQC Misha Salganik ASL ANMO IU BHE BHZ LHZ 1994,216,22:15:00 1994,216,22:15:00 Problem Description DATA DROPOUTS Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:001 1995/02/02 ASL Tyler Storm Description of Problem Resolution Comment I don't know what caused the dropouts. See PROBLEM RESOLUTION REPORT HRV1995:004 for more detail. No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT HRV1995:080 1995/06/14 Harvard WQC Misha Salganik ASL KIV II BHZ BHN BHE 1994,353,08:41:00 1994,353,08:41:00 Problem Description DATA DROPOUTS Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:080 1995/07/07 IDA Peter Davis Description of Problem Resolution COMMENT The field tape in the data logger was changed at approximately 94:353-07:21. The initial data records on the succeeding tape had incorrect time stamps written into them and had to be discarded. The first records with acceptable stamps began at approximately 94:353-09:33. This is generally not a problem at station KIV. END **************************************************************************** DATA PROBLEM REPORT HRV1995:081 1995/06/14 Harvard WQC Misha Salganik ASL KONO IU LHZ LHN LHE 1994,353,17:41:00 1994,353,17:41:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:081 2005/07/14 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The Z and N components of the KONO STS1 were "flat-lined" during this time. The problem was fixed at 1994, 355, 11:03. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT HRV1995:079 1995/06/14 Harvard WQC Misha Salganik ASL KIP IU LHE LHN LHZ 1994,361,21:59:00 1994,361,21:59:00 Problem Description DATA DROPOUTS Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:079 2005/11/22 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT HRV1995:075 1995/06/14 Harvard WQC Misha Salganik ASL DBIC GT LHN LHE 1994,348,07:28:00 1994,348,07:28:00 Problem Description LOW FREQUENCY NOISE Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:075 2003/03/04 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The problem is a large spike in the data on both horizontal channels of the 54000 at DBIC. Unfortunately, this instrument has a problem of coherent spiking on the horizontals. Data quality returns to normal after the components relax from the disturbance caused by the spike. END **************************************************************************** DATA PROBLEM REPORT HRV1995:076 1995/06/14 Harvard WQC Misha Salganik ASL DGR TS LHZ LHN LHE 1994,345,02:25:00 1994,345,02:25:00 Problem Description OTHER DEAD CHANNEL Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:076 2003/03/05 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Station DGR appears to be in an area afflicted by high levels of low frequency background noise. However, the precise problem shown in the postscript file HRV95:076.ps cannot be found in the archived data for TS/DGR at 1994, 345 02:25. No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT HRV1995:077 1995/06/14 Harvard WQC Misha Salganik ASL GLA TS *HE 1994,341,21:30:00 1994,348,20:35:00 Problem Description OTHER SEED COMMENT REFERENCE C 4010 Channel is down. DEAD CHANNEL. Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:077 2001/12/07 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The E component of the STS1 at GLA was malfunctioning during this time period. Data quality returns to normal on 1994, 348, 20:35. END **************************************************************************** DATA PROBLEM REPORT HRV1995:078 1995/06/14 Harvard WQC Misha Salganik ASL GNI IU LHE LHN LHZ 1994,343,23:04:00 1994,343,23:04:00 Problem Description DATA DROPOUTS Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:078 2005/01/17 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The permanent archive has continuous GNI data for the time specified in the dpr. I am not sure what caused the dropouts originally, but the problem appears to have been fixed. END **************************************************************************** DATA PROBLEM REPORT HRV1995:071 1994/06/14 Harvard WQC Misha Salganik ASL BGCA GT LHE LHN LHZ 1994,343,23:04:00 1994,343,23:04:00 Problem Description DATA DROPOUTS Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:071 2000/06/19 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION There is a short data gap at BGCA from 1994,343,18:04 to 1994,343,21:34. The reason for the data outage is unknown. END **************************************************************************** DATA PROBLEM REPORT HRV1995:072 1994/06/14 Harvard WQC Misha Salganik ASL BJT IC LHZ 1994,341,03:37:00 1994,341,03:37:00 Problem Description DATA GLITCHES Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:072 2000/07/05 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION There are 5 spikes on the Z component of the STS-1 at BJT on 1994,341. They begin at 04:58 and end at 05:30. They appear to be a random occurrance. Since the data return to normal quality after these spikes, no further action will be taken. END **************************************************************************** DATA PROBLEM REPORT HRV1995:073 1995/06/14 Harvard WQC Misha Salganik ASL BJT IC LHZ LHN LHE 1994,342,05:08:00 1994,342,05:08:00 Problem Description DATA DROPOUTS Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:073 2000/07/05 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION We are missing between 1 and 2.5 hours of data from station BJT on day 1994,342. The reason for this data outage is unknown. Since normal data retrieval resumed after this outage, no further action will be taken. END **************************************************************************** DATA PROBLEM REPORT HRV1995:074 1995/06/14 Harvard WQC Misha Salganik ASL BJT IC LHE 1994,344,16:17:00 1994,344,16:17:00 Problem Description OTHER DEAD CHANNEL END PROBLEM RESOLUTION REPORT HRV1995:074 1995/07/14 ASL Tyler Storm Description of Problem Resolution Resolution LHE is definitely not dead in this example (HRV1995:074.ps). Possibly this was mistakenly submitted as a problem. No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT HRV1995:070 1995/06/03 Harvard WQC Misha Salganik ASL BAR TS LHZ LHN LHE 1994,348,22:20:00 1994,348,22:20:00 Problem Description DATA DROPOUTS Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:070 2000/06/19 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Data from BAR are unavailable for the time period 1994,335,21:09 to 1994,348,22:57. The reason for this data outage is unknown. END **************************************************************************** DATA PROBLEM REPORT HRV1995:068 1995/06/14 Harvard WQC Misha Salganik ASL AFI IU LHN LHE 1994,348,19:44:00 1994,348,19:44:00 Problem Description DATA DROPOUTS Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:068 2000/06/06 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Our data holdings indicate that for AFI there is a short data gap that SUPPLEMENT The reason for the data outage is unknown. END **************************************************************************** DATA PROBLEM REPORT HRV1995:069 1995/06/14 Harvard WQC Misha Salganik ASL ARU II BHE BHN BHZ 1994,354,11:08:00 1994,354,11:08:00 Problem Description DATA DROPOUTS Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:069 1995/07/07 IDA Peter Davis Description of Problem Resolution RESOLUTION Several tapes from ARU during this period were fragmented. The problems may have been related to bad tapes, but probably were due to miscommunication between the DAS and the ARS. The fragmentation ceased after the DAS was rebooted on 1994355. END **************************************************************************** DATA PROBLEM REPORT HRV1995:064 1995/05/03 Harvard WQC Misha Salganik ASL OBN II BHZ BHN BHE 1994,324,16:59:00 1994,324,16:59:00 Problem Description DATA DROPOUTS Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:064 1995/05/11 IDA Peter Davis Description of Problem Resolution COMMENT The data in the IRIS/IDA data archive for BH* channels are complete for this day and the succeeding day. The SEED tape to transmit these data to the IRIS DMC was sent on December 21, 1994. END **************************************************************************** DATA PROBLEM REPORT HRV1995:065 1995/11/10 Harvard WQC Misha Salganik ASL PAB IU LHN LHE 1994,314,07:07:00 1994,314,07:07:00 Problem Description DATA DROPOUTS Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:065 1995/07/15 ASL Tyler Storm Description of Problem Resolution Comment This is the beginning of the long-period records after a three day outage. No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT HRV1995:066 1995/05/03 Harvard WQC Misha Salganik ASL PLCA GT LHZ LHN LHE 1994,313,18:21:00 1994,313,18:21:00 Problem Description DATA DROPOUTS Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:066 1995/07/15 ASL Tyler Storm Description of Problem Resolution Comment I don't know what caused the outage. I tried to "pull" the data to take a closer looked, but I could not access and data before 19:00 on day 94,313. No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT HRV1995:067 1995/06/14 Harvard WQC Misha Salganik ASL ADK IU LHE LHN LHZ 1994,344,03:39:00 1994,344,03:39:00 Problem Description DATA DROPOUTS Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:067 2000/06/06 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Our data holdings indicate that for ADK there is indeed a short data gap that SUPPLEMENT is unknown END **************************************************************************** DATA PROBLEM REPORT HRV1995:060 1995/05/03 Harvard WQC Misha Salganik ASL LSZ IU LHZ LHN LHE 1994,282,07:55:00 1994,282,07:55:00 Problem Description DATA DROPOUTS Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:060 1995/07/14 ASL Tyler Storm Description of Problem Resolution Resolution We are seeing end of the long-period records, at the beginning of a 12-day outage. No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT HRV1995:061 1995/05/03 Harvard WQC Misha Salganik ASL LSZ IU VHZ VHN VHE 1995,327,05:56:00 1995,327,05:56:00 Problem Description DATA DROPOUTS Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:061 1995/05/25 ASL Tyler Storm Description of Problem Resolution Comment This type of coherent noise is usually caused by the pier tilting in some manner. Most likely, someone was in the vault at this time. No further action will be taken. PROBLEM RESOLUTION REPORT SUPPLEMENT HRV1995:061 95/07/14 ASL Tyler Storm Description of Problem Resolution Resolution The station had just came back up after a 23 day outage. The gaps at the front of this window is the beginning of the first very long-period records. No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT HRV1995:062 1995/05/03 Harvard WQC Misha Salganik ASL LPAZ GT LHZ LHN LHE 1994,287,20:08:00 1994,287,20:08:00 Problem Description DATA DROPOUTS Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:062 1995/07/14 ASL Tyler Storm Description of Problem Resolution Comment Although the synthetic data, and the "real" data do not seem very similar, I do not see any data dropouts. No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT HRV1995:063 1995/05/03 Harvard WQC Misha Salganik ASL NWAO IU LHZ LHN LHE 1994,308,11:53:00 1994,308,11:53:00 Problem Description DATA DROPOUTS Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:063 2007/01/23 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION I am not sure why those data gaps exist, but we are indeed missing ~1.5 hours of LH? NWAO data at that time. Continuous data resumes at the end of the gap. No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT HRV1995:057 1995/05/03 Harvard WQC Misha Salganik ASL CHTO IU VHZ VHE 1994,308,01:13:00 1994,308,01:13:00 Problem Description DATA DROPOUTS Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:057 1995/07/15 ASL Tyler Storm Description of Problem Resolution Comment I see the outage, but I don't know what caused it. There was not an outage between tapes, and the recording should have been continuous. I will continue to investigate problems of this nature, but no further action will be taken on this particular one. END **************************************************************************** DATA PROBLEM REPORT HRV1995:058 1995/05/03 Harvard WQC Misha Salganik ASL FFC II LHZ LHN LHE 1994,286,11:28:00 1994,286,11:28:00 Problem Description DATA DROPOUTS Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:058 1995/05/11 IDA Peter Davis Description of Problem Resolution RESOLUTION There is a data gap for all channels from 1994280-07:40 -- 1994286-12:44 which would account for the data dropout noted here. Apparently the ARS stopped writing to tape after two days of the normal one-week tape changed interval. It is very unusual for FFC to display this type of behavior, and it has not been repeated since. END **************************************************************************** DATA PROBLEM REPORT HRV1995:059 1995/05/03 Harvard WQC Misha Salganik ASL LVZ II BHZ BHN BHE 1994,283,01:58:00 1994,283,01:58:00 Problem Description DATA DROPOUTS Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:059 1995/05/11 IDA Peter Davis Description of Problem Resolution COMMENT The data in the IRIS/IDA data archive for BH* channels are complete for this day and the succeeding day. The SEED tape to transmit these data to the IRIS DMC was sent on November 9, 1994. END **************************************************************************** DATA PROBLEM REPORT HRV1995:053 1995/04/30 Harvard WQC Misha Salganik ASL RPN II BHZ BHN BHE 1994,318,19:15:00 1994,318,19:15:00 Problem Description LOW FREQUENCY NOISE Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:053 1995/05/08 IDA Peter Davis Description of Problem Resolution COMMENT The transient noted in this DPR as low frequency noise follows a reboot of the data acquisition system hardware on 1994318-20:33. The data gap which preceded this reboot extended from 1994317-05:20 to 1994318-20:33. The cause of the fluctuation was very likely a power problem at the site. END **************************************************************************** DATA PROBLEM REPORT HRV1995:054 1995/05/03 Harvard WQC Misha Salganik ASL AAK II BHZ BHN BHE 1994,324,02:57:00 1994,324,02:57:00 Problem Description DATA DROPOUTS Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:054 1995/05/11 IDA Peter Davis Description of Problem Resolution RESOLUTION There is a data gap for all channels from 1994319-05:59 -- 1994324-03:32 which would account for the data dropout noted here. The dropout was probably due to a failure of the ARS to write to tape. A site maintenance visit was made to AAK on 1995096, and since that time the station has performed very well. END **************************************************************************** DATA PROBLEM REPORT HRV1995:055 1995/05/03 Harvard WQC Misha Salganik ASL AAK II VHZ VHN VHE 1994,326,11:11:00 1994,326,11:11:00 Problem Description DATA DROPOUTS Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:055 1995/05/11 IDA Peter Davis Description of Problem Resolution RESOLUTION There is a data gap for all channels from 1994324-16:02 -- 1994326-12:57 which would account for the data dropout noted here. A site maintenance visit was made to AAK on 1995096, and since that time the station has performed very well. END **************************************************************************** DATA PROBLEM REPORT HRV1995:056 1995/05/03 Harvard WQC Misha Salganik ASL CHTO IU LHZ LHN LHE 1994,274,23:28:00 1994,274,23:28:00 Problem Description DATA DROPOUTS Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:056 2000/10/03 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Roughly 13.5 hours of LH* data are missing from the middle of the day on 1994,274. The reason for the outage is unknown. END **************************************************************************** DATA PROBLEM REPORT HRV1995:050 1995/04/30 Harvard WQC Misha Salganik ASL MA2 IU LHZ BHZ LHN LHE BHN BHE 1994,254,00:00:00 1994,304,00:00:00 Problem Description INCORRECT TIME Station's clock is fast by the few seconds. Postscript file was placed into /pub/qc/qc_ps The start and end times were further refined from a residual analysis study by Professor Guy Masters (gmasters@ucsd.edu). END PROBLEM RESOLUTION REPORT HRV1995:050 2003/04/10 ASL DCC Tyler Storm Description of Problem Resolution COMMENT No further action required. END **************************************************************************** DATA PROBLEM REPORT HRV1995:051 1995/04/30 Harvard WQC Misha Salganik ASL MDJ CD * 1994,170,06:06:00 1996,313,00:00:00 Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE C 4526 Channel has occasional digitizer-related data glitches. Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:051 1996/06/16 ASL DCC Tyler Storm Description of Problem Resolution COMMENT The vertical seismometer, or some portion of the digitizer was not working properly at this time. I don't remember the problem ever being fixed, and think it degraded more as time went on. This is another situation with the CDSN network where we were/are waiting for the funds to upgrade the station to an IRIS type rather than fixing the old style equipment. The CDSN network was a very good set of stations, but now the equipment is too old, and is showing the signs of wear. No further action will be taken. SUPPLEMENT The CD/MDJ digitizer began to have problems at 1994, 170, 06:06. Between then and when the station equipment was upgraded and replaced by IC/MDJ, the CD/MDJ digitizer problems gradually worsened. Primarily the problems observed were digitizer glitches and digitizer-induced response problems. Data during this time period should be used with caution. END **************************************************************************** DATA PROBLEM REPORT HRV1995:052 1995/04/30 Harvard WQC Misha Salganik ASL PAS TS LHZ LHN LHE 1994,280,15:47:00 1994,280,15:47:00 Problem Description DATA DROPOUTS Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:052 1995/06/29 ASL Tyler Storm Description of Problem Resolution RESOLUTION The data is OK. The "straight lines" the LH channels were apparently caused by transmission errors. I pulled the same time segments from our mass store, and there is a small gap. Beyond that, the data looked fine. END **************************************************************************** DATA PROBLEM REPORT DMCQC2013:0101 2013/10/25 IRIS DMC Gillian Sharer DMC K51A TA * 2013,264,08:00:00 2013,264,15:17:00 Problem Description DEAD CHANNEL TA.K51A.VM? started rapidly drifting on 09/21/13 08:00 UTC and quickly came up against the stops. At that time, K51A stopped recording accurate seismic data. END PROBLEM RESOLUTION REPORT DMCQC2013:0101 2013/10/25 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION TA.K51A started recording accurate data again after a mass recenter on 09/21/13 15:17 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2013:0102 2013/10/25 IRIS DMC Gillian Sharer DMC L47A TA * 2013,268,14:48:00 2013,268,17:56:00 Problem Description OTHER After a sensor swap on 09/25/13 14:48 UTC, the new sensor would not center VM2. Data is not usable during this time period. END **************************************************************************** DATA PROBLEM REPORT DMCQC2013:0100 2013/10/25 IRIS DMC Gillian Sharer DMC Y59A TA ?H[NE] 2013,249,23:54:00 2013,250,01:17:00 Problem Description DEAD CHANNEL TA.Y59A.?H[NE] stopped recording seismic energy when VM2 and VM3 suddenly hit the stops on 05/29/13 23:54 UTC. END PROBLEM RESOLUTION REPORT DMCQC2013:0100 2013/10/25 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION TA.Y59A started recording accurate seismic data again after a successful mass recenter on 05/30/13 01:17 UTC. END **************************************************************************** DATA PROBLEM REPORT HRV1995:046 1995/04/30 Harvard WQC Misha Salganik ASL GNI IU *H* 1994,319,20:18:00 1996,336,00:00:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 450 Time Uncertain. Station's clock is fast by 6 sec. Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:046 2004/03/09 ASL DCC Tyler Storm Description of Problem Resolution COMMENT We were unable to confirm the timing error. However, timing quality is normal as of 1996, 336. END **************************************************************************** DATA PROBLEM REPORT HRV1995:047 1995/04/30 Harvard WQC Misha Salganik ASL KMI CD BHZ BHN BHE 1994,319,20:18:00 1994,319,20:18:00 Problem Description INCORRECT TIME Station's clock is probably slow by a few seconds. Postscript file was placed into /pub/qc/qc_ps END **************************************************************************** DATA PROBLEM REPORT HRV1995:048 1995/04/30 Harvard WQC Misha Salganik ASL LPAZ GT LHZ LHN LHE 1994,332,18:32:00 1994,332,18:32:00 Problem Description DATA DROPOUTS Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:048 1995/06/29 ASL Tyler Storm Description of Problem Resolution RESOLUTION The outage is due to a communication problem between the data acquisition portion of the system to the data processing end. No further action wil be taken. END **************************************************************************** DATA PROBLEM REPORT HRV1995:049 1995/04/30 Harvard WQC Misha Salganik ASL LZH CD LHN 1994,272,02:19:00 1994,277,13:32:00 Problem Description OTHER SEED COMMENT REFERENCE C 4010 Channel is down. LHN recording looks strange.Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:049 2007/01/17 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION It appears that the LZH KS36000I LHN data stream was dead during this time period. We have no idea what caused the problem, or how it was solved. Whatever the problem was, it did not affect any other data stream. Data quality returns to normal at 1994, 277, 13:32. END **************************************************************************** DATA PROBLEM REPORT HRV1995:042 1995/04/30 Harvard WQC Misha Salganik ASL FFC II LHZ LHN LHE 1994,291,17:00:00 1994,291,17:00:00 Problem Description LOW FREQUENCY NOISE Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:042 1995/05/04 IDA Peter Davis Description of Problem Resolution RESOLUTION There was indeed a data dropout at this point caused be a premature end-of-file on the field tape. Much of the VH* data for the period between the premature EOF and the next field tape was restored using NRTS data, but the gap noted here was caused by a seam between the tape and teletransmitted data. Procedures to substitute NRTS data into field tape gaps have been refined considerably since the time these data were inserted, and it is less likely that as large a gap would recur. END **************************************************************************** DATA PROBLEM REPORT HRV1995:043 1995/04/30 Harvard WQC Misha Salganik ASL GLA TS BHZ BHN 1994,298,00:54:00 1994,298,00:54:00 Problem Description DATA DROPOUTS Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:043 1995/05/25 ASL Tyler Storm Description of Problem Resolution Comment I don't know what is causing the glitches/dropouts. They are most likely originating in the digitizer because of power fluctuations. No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT HRV1995:044 1995/04/30 Harvard WQC Misha Salganik ASL GNI IU LHZ LHN LHE 1994,274,23:28:00 1994,274,23:28:00 Problem Description DATA DROPOUTS Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:044 1995/05/25 ASL Tyler Storm Description of Problem Resolution Resolution These data dropouts are caused by fluctuating power. No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT HRV1995:045 1995/04/30 Harvard WQC Misha Salganik ASL GNI IU LHZ LHN LHE 1994,330,06:11:00 1994,330,06:11:00 Problem Description DATA DROPOUTS Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:045 1995/05/25 ASL Tyler Storm Description of Problem Resolution Resolution These data dropouts are caused by fluctuating power. No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT HRV1995:040 1995/04/30 Harvard WQC Misha Salganik ASL FFC II VHZ VHN VHE 1994,280,23:26:00 1994,280,23:26:00 Problem Description DATA DROPOUTS Postscript file was placed into /pub/qc/qc_ps END **************************************************************************** DATA PROBLEM REPORT HRV1995:041 1995/04/30 Harvard WQC Misha Salganik ASL FFC II VHZ 1994,280,07:00:00 1994,280,07:00:00 Problem Description DATA DROPOUTS Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:041 1995/05/04 IDA Peter Davis Description of Problem Resolution RESOLUTION The low-frequency transient on all three components was induced when, at IDA's request, the station operator re-centered the masses. END **************************************************************************** DATA PROBLEM REPORT HRV1995:097 1995/06/14 Harvard WQC Misha Salganik ASL TUC IU LHZ LHN LHE 1994,346,14:52:00 1994,346,14:52:00 Problem Description DATA DROPOUTS Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:097 1995/09/11 ASL Tyler Storm Description of Problem Resolution Comment We do not know exactly what caused the outage. The problem was most likely related to power since it affected all three components. No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT HRV1995:098 1995/06/14 Harvard WQC Misha Salganik ASL VTV TS LHN LHE LHZ 1994,362,22:37:00 1994,362,22:37:00 Problem Description DATA DROPOUTS Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:098 1996/07/05 ASL DCC Tyler Storm Description of Problem Resolution COMMENT The reason for the data outage is unknown. No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT HRV1995:099 1995/06/16 Harvard WQC Misha Salganik ASL DPC CZ BHZ BHN BHE 1995,007,02:36:00 1995,007,02:36:00 Problem Description INCORRECT TIME The clock on the station is slow by 7 sec. Postscript file was placed into /pub/ qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:099 1996/07/05 ASL DCC Tyler Storm Description of Problem Resolution COMMENT In general, the timing was not very reliable for 95. The station had many clock problems. The timing for the more recent data (96) looks good. No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT HRV1995:093 1995/06/14 Harvard WQC Misha Salganik ASL RPN II BHE BHN BHZ 1994,364,15:12:00 1994,364,15:12:00 Problem Description DATA DROPOUTS Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:093 1995/07/07 IDA Peter Davis Description of Problem Resolution RESOLUTION This field tape was extremely long (94:348-06:14--95:004-06:38) because local operators had difficulty reaching the station following severe storms. Extended power outages are common at RPN during such storms and may explain the large gaps in it: 94:356-07:23 to 94:363-18:23 94:363-23:49 to 94:364-15:44 END **************************************************************************** DATA PROBLEM REPORT HRV1995:094 1995/06/14 Harvard WQC Misha Salganik ASL SVD TS VHE 1994,352,20:38:00 1994,352,20:38:00 Problem Description DATA DROPOUTS Postscript file was placed into /pub/qc/qc_ps END **************************************************************************** DATA PROBLEM REPORT HRV1995:095 1995/06/14 Harvard WQC Misha Salganik ASL TSUM IU * 1994,353,11:41:00 1994,354,14:38:00 Problem Description DATA DROPOUTS Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:095 1995/09/11 ASL Tyler Storm Description of Problem Resolution It looks like data acquisition was stopped for about one day between the tape change. Due to the different rates at which data compresses, the outage beginning and end times are staggered for the various channels. No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT HRV1995:096 1995/06/14 Harvard WQC Misha Salganik ASL TSUM IU LHE 1994,361,17:32:00 1994,361,17:32:00 Problem Description OTHER DEAD CHANNEL. Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:096 1996/03/20 ASL Tyler Storm Description of Problem Resolution SUPPLEMENT The E/W instrument was replaced on 13 Nov 95. END **************************************************************************** DATA PROBLEM REPORT HRV1995:090 1995/06/14 Harvard WQC Misha Salganik ASL PET IU LHZ LHN LHE 1994,347,20:27:00 1994,347,20:27:00 Problem Description DATA DROPOUTS Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:090 2003/06/23 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION There indeed is data missing from the PET LH* data streams on 1994, 347. Unfortunately, there is no way to fill in the gaps at this point in time. No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT HRV1995:091 1995/06/94 Harvard WQC Misha Salganik ASL PFO TS LHE LHN LHZ 1994,355,23:35:00 0942,355,03:00:00 Problem Description DATA DROPOUTS Postscript file was placed into /pub/qc/qc_ps END **************************************************************************** DATA PROBLEM REPORT HRV1995:092 1995/06/14 Harvard WQC Misha Salganik ASL PLCA GT LHE LHN LHZ 1994,354,11:08:00 1994,354,11:08:00 Problem Description DATA DROPOUTS Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:092 1995/09/11 ASL Tyler Storm Description of Problem Resolution Comment The reason for the outage is unknown. No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT HRV1995:086 1995/06/14 Harvard WQC Misha Salganik ASL NNA II LHN LHE 1994,342,10:47:00 1994,342,10:47:00 Problem Description LOW FREQUENCY NOISE Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:086 1995/07/07 IDA Peter Davis Description of Problem Resolution COMMENT Transients of this kind appear at NNA on 94:335 and persist at irregular intervals for about 14 days. After that time they are much rarer. END **************************************************************************** DATA PROBLEM REPORT HRV1995:087 1995/06/14 Harvard WQC Misha Salganik ASL NRIL II BHZ BHN BHE 1994,348,07:28:00 1994,348,07:28:00 Problem Description DATA DROPOUTS Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:087 1995/07/07 IDA Peter Davis Description of Problem Resolution COMMENT This field tape was highly fragmented. Persistent problems lasting through this spring resulted in a repair visit to this station on 1995187. END **************************************************************************** DATA PROBLEM REPORT HRV1995:088 1995/06/14 Harvard WQC Misha Salganik ASL PAB IU *HZ 1994,365,13:50:00 1994,365,22:58:00 Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE C 4010 Channel is down. Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:088 1995/07/14 ASL Tyler Storm Description of Problem Resolution Comment This is most likely an "over-driven" calibration, or some sort of test. Whatever the case, the vertical data was unusable at this time. No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT HRV1995:089 1995/06/14 Harvard WQC Misha Salganik ASL PAS TS LHZ LHN LHE 1994,361,17:32:00 1994,361,17:32:00 Problem Description DATA DROPOUTS Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:089 2007/01/24 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION There is a 38 minute gap in the PAS LH data streams around 1994, 361, 17:59. I am not sure what produced the gap, but continuous data resumes around 1994, 361, 18:34. No further action is necessary. END **************************************************************************** DATA PROBLEM REPORT HRV1995:082 1995/06/14 Harvard WQC Misha Salganik ASL LPAZ GT BHZ BHN BHE 1994,339,00:46:00 1994,339,00:46:00 Problem Description DATA DROPOUTS Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:082 1995/09/11 ASL Tyler Storm Description of Problem Resolution Comment Reason for outage is unknown. No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT HRV1995:083 1995/06/14 Harvard WQC Misha Salganik ASL LVZ II BHE BHN BHZ 1994,353,09:22:00 1994,353,09:22:00 Problem Description DATA DROPOUTS Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:083 1995/07/07 IDA Peter Davis Description of Problem Resolution COMMENT There is a data gap from 94:352-20:15 -- 94:353-10:35. END **************************************************************************** DATA PROBLEM REPORT HRV1995:085 1995/06/14 Harvard WQC Misha Salganik ASL NIL II LHE 1994,362,12:19:00 1994,362,12:19:00 Problem Description LOW FREQUENCY NOISE Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1995:085 1995/07/07 IDA Peter Davis Description of Problem Resolution COMMENT This is a transient of unknown origin. The data logger at NIL was upgraded on 1995110. END **************************************************************************** DATA PROBLEM REPORT IDA1993:1 1993/03/24 IDA DCC Holly Given IDA ESK II BHE,SHE,VHE 1993,043,10:06:00 1993,065,04:59:00 Problem Description INVALID RESPONSE An intermittent problem with the gain of all data streams derived from the STS-1 EW high-gain channel was observed during the time period shown above. The gain changed abruptly to an unknown (smaller) value. We suspect a problematic contact in an analog amplifier. The distributed response is thus invalid. SEED data from 1993:043:10:06:55 through 1993:048:10:13 was distributed without channel comments; data from 1993:048:10:13 through 1993:065:04:59 are flagged with channel comments 83 ('response information not available at this time') and 84 ('station modification: response information not correct -- do not use!'). No action or resolution report is required. The channels have returned to normal. END PROBLEM RESOLUTION REPORT IDA1993:1 1993/03/26 DMC Tim Ahern Description of Problem Resolution None needed END **************************************************************************** DATA PROBLEM REPORT ANSS2004:044 2004/12/29 ANSS DCC John McMillan ANSS SIT AT BH*, LH* 1999,223,00:00:00 1999,223,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE S 2510 Intrinsic Quanterra UltraShear timing error Quanterra (Q730) timing error due to filter cascade; Similar problem found in Table A Corrections at http://aslwww.cr.usgs.gov/Seismic_Data/timing.html END **************************************************************************** DATA PROBLEM REPORT ANSS2004:043 2004/12/29 ANSS DCC John McMillan ANSS PMR AT BH*, LH* 1999,233,00:00:00 1999,233,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE S 2510 Intrinsic Quanterra UltraShear timing error Quanterra timing error due to filter cascade; Information found in Table A Corrections at http://aslwww.cr.usgs.gov/Seismic_Data/timing.html END **************************************************************************** DATA PROBLEM REPORT ANSS2004:042 2004/12/29 ANSS DCC John McMillan ANSS MSO US BH*, LH* 2002,235,00:00:00 2005,102,19:23:00 Problem Description OTHER SEED COMMENT REFERENCE S 2510 Intrinsic Quanterra UltraShear timing error Quanterra (Q730) timing error due to filter cascade; Similar problem found in Table A Corrections at http://aslwww.cr.usgs.gov/Seismic_Data/timing.html. At 2005*102+19:23 UTC new FIR filter delays were applied to the Q730 code. This effectively resolves timing error issue between BH* and derived LH*. END **************************************************************************** DATA PROBLEM REPORT ANSS2004:041 2004/12/29 ANSS DCC John McMillan ANSS MCWV US BH*, LH* 1991,087,00:00:00 2005,103,23:59:00 Problem Description OTHER SEED COMMENT REFERENCE S 2510 Intrinsic Quanterra UltraShear timing error Quanterra (Q680) timing error due to filter cascade; Information found in Table A Corrections at http://aslwww.cr.usgs.gov/Seismic_Data/timing.html. At 2005*103+23:59 UTC new FIR filter delays were applied to the Q680 code. This effectively resolves timing error issue between BH* and derived LH*. END **************************************************************************** DATA PROBLEM REPORT ANSS2004:040 2004/12/28 ANSS DCC John McMillan ANSS JFWS US BH*, LH* 1992,211,00:00:00 2005,103,21:43:00 Problem Description OTHER SEED COMMENT REFERENCE S 2510 Intrinsic Quanterra UltraShear timing error Quanterra (Q680) timing error due to filter cascade; Information found in Table A Corrections at http://aslwww.cr.usgs.gov/Seismic_Data/timing.html. At 2005*103+21:43 UTC new FIR filter delays were applied to the Q680 code. This effectively resolves timing error issue between BH* and derived LH*. END **************************************************************************** DATA PROBLEM REPORT ANSS2004:029 2004/12/27 ANSS DCC John McMillan ANSS BLA US BH*, LH* 1994,175,00:00:00 2005,102,20:39:00 Problem Description OTHER SEED COMMENT REFERENCE S 2510 Intrinsic Quanterra UltraShear timing error Quanterra (Q680) timing error due to filter cascade; Information found in Table A Corrections at http://aslwww.cr.usgs.gov/Seismic_Data/timing.html. At 2005*102+20:39 UTC new FIR filter delays were applied to the Q680 code. This effectively resolves timing error issue between BH* and derived LH*. END **************************************************************************** DATA PROBLEM REPORT ANSS2004:028 2004/12/27 ANSS DCC John McMillan ANSS BINY US BH*, LH* 1993,229,00:00:00 2005,102,20:25:00 Problem Description OTHER SEED COMMENT REFERENCE S 2510 Intrinsic Quanterra UltraShear timing error Quanterra (Q680) timing error due to filter cascade; Information found in Table A Corrections at http://aslwww.cr.usgs.gov/Seismic_Data/timing.html. At 2005*103+20:25 UTC new FIR filter delays were applied to the Q680 code. This effectively resolves timing error issue between BH* and derived LH*. END **************************************************************************** DATA PROBLEM REPORT ANSS2004:027 2004/12/27 ANSS DCC John McMillan ANSS BINY US BHZ, LHZ 2004,275,00:00:00 2004,275,00:00:00 Problem Description SPIKES SEED COMMENT REFERENCE C 2512 Data spiky and possibly asymmetric. Data spikes at random intervals and amplitudes END **************************************************************************** DATA PROBLEM REPORT ANSS2004:026 2004/12/08 ANSS DCC John McMillane ANSS OXF US BH*,LH* 2004,275,00:00:00 2006,001,00:00:00 2006,001,00:00:00 Problem Description SPIKES SEED COMMENT REFERENCE C 2514 Large high frequency noise. Large amplitude, random spikes on broadband horizontal components. END **************************************************************************** DATA PROBLEM REPORT ANSS2004:025 2004/12/08 ANSS DCC John McMillan ANSS WMOK US BHN, BHE, LHN, LHE 2004,290,00:00:00 2004,290,00:00:00 Problem Description SPIKES SEED COMMENT REFERENCE C 2512 Data spiky and possibly asymmetric. Random spikes on broadband horizontal components. END **************************************************************************** DATA PROBLEM REPORT ANSS2004:024 2004/12/08 ANSS DCC John McMillan ANSS WMOK US BH*, LH* 1992,317,00:00:00 2004,341,20:30:00 Problem Description OTHER SEED COMMENT REFERENCE S 2510 Intrinsic Quanterra UltraShear timing error Quanterra timing error due to filter cascade; Information found in Table A Corrections at http://aslwww.cr.usgs.gov/Seismic_Data/timing.html; On 2004*341+20:30 GMT the Q680 was replaced by a Q330 whose filter cascade does not generate a timing error; In addition, the CMG3-NSN was replaced by a STS-2 Low gain (standard) and the CMG-5 was replaced by a Episensor (FBA-EST). END **************************************************************************** DATA PROBLEM REPORT ANSS2004:023 2004/12/03 ANSS DCC Mark Meremonte ANSS ACSO US ALL 2004,275,00:00:00 2004,275,00:00:00 Problem Description NOISE On-going cultural noise from AC and Heating systems and normal daily activity of building occupants; Note: Both broadband and strong motion instruments inside building on an "isolated" pier END **************************************************************************** DATA PROBLEM REPORT ANSS2004:022 2004/12/03 ANSS DCC Mark Meremonte ANSS ACSO US BH*, LH* 2000,135,00:00:00 2005,098,20:18:00 Problem Description OTHER SEED COMMENT REFERENCE S 2510 Intrinsic Quanterra UltraShear timing error Quanterra (Q730) timing error due to filter cascade; Information found in Table A Corrections at http://aslwww.cr.usgs.gov/Seismic_Data/timing.html. At 2005*098+20:18 UTC new FIR filter delays were applied to the Q680 code. This effectively resolves timing error issue between BH* and derived LH*. END **************************************************************************** DATA PROBLEM REPORT ANSS2004:021 2004/12/03 ANSS DCC John McMillan ANSS LAO US BH*, LH* 2004,197,00:00:00 2005,103,20:44:00 Problem Description OTHER SEED COMMENT REFERENCE S 2510 Intrinsic Quanterra UltraShear timing error Quanterra (Q730) timing error due to filter cascade; Similar problem described in Table A Corrections at http://aslwww.cr.usgs.gov/Seismic_Data/timing.html. At 2005*103+20:44 UTC new FIR filter delays were applied to the Q730 code. This effectively resolves timing error issue between BH* and derived LH*. END **************************************************************************** DATA PROBLEM REPORT ANSS2004:020 2004/12/03 ANSS DCC Mark Meremonte ANSS PMR AT BH*, LH* 1999,223,00:00:00 1999,223,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE S 2510 Intrinsic Quanterra UltraShear timing error Quanterra (Q680) timinr error due to filter cascade; Information found in Table A Corrections at http://aslwww.cr.usgs.gov/Seimic_Data/timing.html END **************************************************************************** DATA PROBLEM REPORT ANSS2004:039 2004/12/28 ANSS DCC John McMillan ANSS JCT US BH*, LH* 2000,034,00:00:00 2004,351,21:52:00 Problem Description OTHER SEED COMMENT REFERENCE S 2510 Intrinsic Quanterra UltraShear timing error Quanterra (Q730) timing error due to filter cascade; Similar problem found in Table A Corrections at http://aslwww.cr.usgs.gov/Seismic_Data/timing.html. On 2004*351+21;52 GMT a the Q680 was replaced by a Q330 whose filter cascade does not generate a timing error; In addition, the STS-2 HG was replaced by a STS-2 LG (standard) and an Episensor (FBA ES-T) was installed. END **************************************************************************** DATA PROBLEM REPORT ANSS2004:038 2004/12/28 ANSS DCC John McMillan ANSS ISCO US BH*, LH* 1996,299,00:00:00 2005,103,21:14:00 Problem Description OTHER SEED COMMENT REFERENCE S 2510 Intrinsic Quanterra UltraShear timing error Quanterra (Q680) timing error due to filter cascade; Information found in Table A Corrections at http://aslwww.cr.usgs.gov/Seismic_Data/timing.html. At 2005*103+21:14 UTC new FIR filter delays were applied to the Q680 code. This effectively resolves timing error issue between BH* and derived LH*. END **************************************************************************** DATA PROBLEM REPORT ANSS2004:037 2004/12/28 ANSS DCC John McMillane ANSS ISCO US BHN, LHN 2004,275,00:00:00 2005,117,18:46:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 2504 Little or no data available. Problem: N/S component not functioning. Resolution: On 2005*117+18:46 UTC the CMG3-NSN was replaced by a STS-2 LG (standard). END **************************************************************************** DATA PROBLEM REPORT ANSS2004:036 2004/12/28 ANSS DCC John McMillane ANSS HAWA US BH*, LH* 1999,113,00:00:00 2005,076,21:00:00 Problem Description OTHER SEED COMMENT REFERENCE S 2510 Intrinsic Quanterra UltraShear timing error Quanterra (Q680) timing error due to filter cascade; Information found in Table A Corrections at http://aslwww.cr.usgs.gov/Seismic_Data/timing.html. On 2005*076+21:00 UTC the Q680 was replaced by a Q330 whose filter cascade does not generate a timing error; In addition, the STS-2 HG was replaced by a STS-2 LG (standard). END **************************************************************************** DATA PROBLEM REPORT ANSS2004:035 2004/12/28 ANSS DCC John McMillane ANSS EYMN US BH*, LH* 1994,269,00:00:00 2005,103,20:53:00 Problem Description OTHER SEED COMMENT REFERENCE S 2510 Intrinsic Quanterra UltraShear timing error Quanterra (Q680) timing error due to filter cascade; Information found in Table A Corrections at http://aslwww.cr.usgs.gov/Seismic_Data/timing.html. At 2005*103+20:53 UTC new FIR filter delays were applied to the Q680 code. This effectively resolves timing error issue between BH* and derived LH*. END **************************************************************************** DATA PROBLEM REPORT ANSS2004:034 2004/12/27 ANSS DCC John McMillan ANSS DUG US BH*,LH* 1993,049,00:00:00 2005,072,19:00:00 Problem Description OTHER SEED COMMENT REFERENCE S 2510 Intrinsic Quanterra UltraShear timing error Quanterra (Q680) timing error due to filter cascade; Information found in Table A Corrections at http://aslwww.cr.usgs.gov/Seismic_Data/timing.html On 2005*072+19:00 GMT the Q680 was replaced by a Q330 whose filter cascade does not generate a timing error; In addition, the STS-2 HG was replaced by a STS-2 LG (standard). END **************************************************************************** DATA PROBLEM REPORT ANSS2004:033 2004/12/27 ANSS DCC John McMillan ANSS DGMT US BH*,LH* 2004,197,00:00:00 2004,197,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE S 2510 Intrinsic Quanterra UltraShear timing error Quanterra (Q730) timing error due to filter cascade; Similar problem found in Table A Corrections at http://aslwww.cr.usgs.gov/Seismic_Data/timing.html END **************************************************************************** DATA PROBLEM REPORT ANSS2004:032 2004/12/27 ANSS DCC John McMillan ANSS CBN US BH*,LH* 2001,166,00:00:00 2005,103,20:45:00 2005,103,20:45:00 Problem Description OTHER SEED COMMENT REFERENCE S 2510 Intrinsic Quanterra UltraShear timing error Quanterra (Q680) timing error due to filter cascade; Information found in Table A Corrections at http://aslwww.cr.usgs.gov/Seismic_Data/timing.html. At 2005*103+20:45 UTC new FIR filter delays were applied to the Q680 code. This effectively resolves timing error issue between BH* and derived LH*. END **************************************************************************** DATA PROBLEM REPORT ANSS2004:031 2004/12/27 ANSS DCC John McMillan ANSS BW06 US BH*, LH* 1996,126,00:00:00 2005,103,20:34:00 Problem Description OTHER SEED COMMENT REFERENCE S 2510 Intrinsic Quanterra UltraShear timing error Quanterra (Q680) timing error due to filter cascade; Information found in Table A Corrections at http://aslwww.cr.usgs.gov/Seismic_Data/timing.html. At 2005*103+20:34 UTC new FIR filter delays were applied to the Q680 code. This effectively resolves timing error issue between BH* and derived LH*. END **************************************************************************** DATA PROBLEM REPORT ANSS2004:030 2004/12/27 ANSS DCC John McMillan ANSS BOZ US BH*, LH* 1999,315,00:00:00 2005,102,18:55:00 Problem Description OTHER SEED COMMENT REFERENCE S 2510 Intrinsic Quanterra UltraShear timing error Quanterra (Q730) timing error due to filter cascade; Similar problem found in Table A Corrections at http://aslwww.cr.usgs.gov/Seismic_Data/timing.html. At 2005*102+18:55 UTC new FIR filter delays were applied to the Q730 code. This effectively resolves timing error issue between BH* and derived LH*. END **************************************************************************** DATA PROBLEM REPORT ASL2003:119 2003/05/29 ASL DCC Valerie Peyton ASL RAR IU *HU *HV *HW 1993,330,18:32:00 1993,331,01:48:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. Field engineers were working on the STS1 sensors at RAR during this time frame. Data channels are dead. END PROBLEM RESOLUTION REPORT ASL2003:119 2003/05/29 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The STS1 sensors were removed from operation at RAR at 1993, 331, 01:48. Since the sensors were there for a noise test and have been removed, there will be no further action taken on this problem. END **************************************************************************** DATA PROBLEM REPORT ASL2003:117 2003/05/29 ASL DCC Valerie Peyton ASL RAR IU */* 2001,254,17:42:00 2003,147,05:58:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 454 Timing MAY be in error, as GPS system is not operating consistently. It appears that the QVI board at RAR is broken. The VCO value is stuck and the clock is drifing rapidly. Timing quality cannot be guaranteed. END PROBLEM RESOLUTION REPORT ASL2003:117 2003/06/02 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION ASL field engineers replaced the RAR QVI board, as well as the rest of the RAR timing system, during a maintenance visit. Timing quality returns to normal at 2003, 147, 05:58. END **************************************************************************** DATA PROBLEM REPORT ASL2003:118 2003/05/29 ASL DCC Valerie Peyton ASL RAR IU *HZ *HN *HE 1993,330,23:09:00 1993,331,02:34:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. Field engineers were working on the KS36000i sensor at RAR during this time frame. Data channels are dead. END PROBLEM RESOLUTION REPORT ASL2003:118 2003/05/29 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The field engineers completed their work on the KS36000i at 1993, 331, 02:34. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2003:111 2003/05/27 ASL DCC Valerie Peyton ASL RAR IU */* 2003,146,00:00:00 2003,158,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. ASL field engineers are on-site at RAR performing station maintenance. Expect variable data quality, tests, and calibrations. END PROBLEM RESOLUTION REPORT ASL2003:111 2003/06/06 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION ASL field engineers left RAR in excellent working condition at 2003, 158, 00:00. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2003:112 2003/05/27 ASL DCC Valerie Peyton ASL LSZ IU 00/LDO 2003,141,13:20:00 2003,141,13:20:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE C 4215 Time uncertain; error less than 1 second. The manner in which Paroscientific microbarograph data are sampled introduces known, uncorrectable timing errors. Microbarograph data from a Paroscientific microbarograph are collected through a serial port, and not obtained via a proper digitizer. Once a second the system "requests" a data point from the microbarograph. The time stamp given each data point is the time at which the request for data point was made. There is no way to determine precisely when each data point was sampled. The timing error introduced by this sampling method is less than 1 second. END PROBLEM RESOLUTION REPORT ASL2003:112 2003/05/27 ASL DCC Valerie Peyton Description of Problem Resolution COMMENT As long as the Paroscientific microbarograph is attached to a serial port and not to a proper digitizing board, this timing ambiguity will remain. END **************************************************************************** DATA PROBLEM REPORT ASL2003:110 2003/05/27 ASL DCC Valerie Peyton ASL LSZ IU 00/*HN 2003,139,00:00:00 2003,139,00:00:00 Problem Description OTHER The feedback electronics box on the STS1 N component at LSZ is wired improperly. Therefore, we are currently unable to calibrate the sensor. This problem will likely persist until we can replace the feedback electronics box. END **************************************************************************** DATA PROBLEM REPORT ASL2003:115 2003/05/29 ASL DCC Valerie Peyton ASL RCBR IU 10/*H2 2002,260,19:27:00 2002,280,15:17:00 Problem Description SPIKES SEED COMMENT REFERENCE C 4510 Channel has frequent spiking. The 2 component of the CMG3-T-B at RCBR is exhibiting high levels of spiking in the data. This is causing excessive noise (by up to 30dB) from 0.04Hz down through all the low frequencies. END PROBLEM RESOLUTION REPORT ASL2003:115 2003/05/29 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The spikes on the 2 component of the CMG3-T-B at RCBR disappeared of their own accord at 2002, 280, 15:17. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2003:116 2003/05/29 ASL DCC Valerie Peyton ASL RCBR IU 10/*H1 2002,260,19:27:00 2004,223,14:11:00 Problem Description SPIKES SEED COMMENT REFERENCE C 4510 Channel has frequent spiking. The 1 component of the CMG3-T-B at RCBR is exhibiting high levels of spiking in the data. This is causing excessive noise (by up to 35dB) from 0.1Hz down through all the low frequencies. END PROBLEM RESOLUTION REPORT ASL2003:116 2004/08/10 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The RCBR CMG3T-B proved unretrievable: it is stuck in the borehole and cannot be removed for repair. This borehole instrument has been replaced with an STS2 in a surface vault, effective 2004, 223, 14:11. Data quality is normal for a surface STS2, and new response epochs have been added to the IU/RCBR dataless to describe the new instrument. END **************************************************************************** DATA PROBLEM REPORT ASL2003:113 2003/05/28 ASL DCC Valerie Peyton ASL TSUM IU */* 2003,149,00:00:00 2003,162,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. ASL field engineers are on-site at TSUM performing station maintenance. Expect variable data quality, tests, and calibrations. END PROBLEM RESOLUTION REPORT ASL2003:113 2003/06/10 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION ASL field engineers left TSUM in great operational order at 2003, 162 00:00. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2003:114 2003/05/29 ASL DCC Valerie Peyton ASL TOL IU BH* LH* UH* VH* 1991,221,00:00:00 1992,275,00:00:00 Problem Description NOISE SEED COMMENT REFERENCE C 4506 Channel has high levels of cultural noise for all frequencies. TOL had excessive noise on all channels at all frequencies. All of this noise was cultural. END PROBLEM RESOLUTION REPORT ASL2003:114 2003/05/29 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Station TOL was very close to a big city, hence the high levels of cultural noise. For this reason, the equipment at TOL was moved to San Pablo, Spain (PAB) day 294 of 1992. PAB data is much more quiet. END **************************************************************************** DATA PROBLEM REPORT ASL2003:108 2003/05/23 ASL DCC Valerie Peyton ASL ADK IU */* 2003,141,00:00:00 2003,146,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. An ASL field engineer is on-site at ADK performing station maintenance. Expect variable data quality, tests, and calibrations. END PROBLEM RESOLUTION REPORT ASL2003:108 2003/05/27 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The ASL field engineer left ADK in fantastic operating condition at 2003, 146, 00:00. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2003:109 2003/05/23 ASL DCC Valerie Peyton ASL LSZ IU */* 2003,139,00:00:00 2003,144,10:03:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. An ASL field engineer is on-site at LSZ performing station maintenance. Expect variable data quality, tests, and calibrations. END PROBLEM RESOLUTION REPORT ASL2003:109 2003/05/27 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION An ASL field engineer left LSZ in fantastic operating order at 2003, 144, 10:03. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2003:106 2003/05/21 ASL DCC Valerie Peyton ASL QIZ IC */* 2003,130,01:20:00 2003,296,02:20:00 Problem Description DATA GLITCHES SEED COMMENT REFERENCE C 4525 Channel has spiking and other data glitches. All three channels of the STS2 at QIZ are exhibiting intermittant data glitches. We are trying to determine the source of the problem. NB: THIS PROBLEM ONLY APPLIES TO LISS DATA FROM QIZ! Data recieved via tape are uncorrupted, indicating the problem is not in the digitizer but somewhere in the live data retrieval system. SUPPLEMENT 2005, 167 Unfortunately, this problem now can show up in data found in the permanent archive, as there were gaps in the tape data that may have been filled with LISS data. END PROBLEM RESOLUTION REPORT ASL2003:106 2003/10/28 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The data glitches in the QIZ LISS data appear to be gone as of 2003, 296, 02:20. We still do not know what caused these glitches, and neither do we know what caused them to go away. We simply hope they will not return. Data quality returns to normal at 2003, 296, 02:20. SUPPLEMENT Further research indicated that the most likely source of this problem was a defective portion of the communications link between QIZ and Beijing. It appears that piece of hardware somewhere in this link was randomly substituting in incorrect bits for data bits. These bad bits are impossible to repair, but data between them are excellent. END **************************************************************************** DATA PROBLEM REPORT ASL2003:107 2003/05/22 ASL DCC Valerie Peyton ASL ANMO IU 10/*HZ 2003,141,23:12:00 2003,143,15:21:00 Problem Description NOISE SEED COMMENT REFERENCE C 4504 Channel exibits high levels of low frequency noise. Something happened to the Z component of the CMG3-T-B at ANMO. Perhaps it was hit by lightning. Regardless, noise levels on this component are excessively high in the low frequencies. The PSD is ~5dB too high in the high frequencies (19Hz - 6.5Hz); in the mid frequencies (6.5Hz - 0.1Hz) it is 2 - 5dB too high; then it is ~20dB too high all the way through the low frequencies (0.1Hz - 0.001Hz). END PROBLEM RESOLUTION REPORT ASL2003:107 2003/05/23 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION An ASL field engineer was able to solve the noise problem on the ANMO CMG3-T-B Z component. Data quality returns to normal at 2003, 143, 15:21. END **************************************************************************** DATA PROBLEM REPORT ASL2003:100 2003/05/09 ASL DCC Tyler Storm ASL CPUP GT 00/BH? 2003,100,00:00:00 2003,172,16:00:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE C 4210 Time uncertain. The KS54000 data is mistimed by several seconds. END PROBLEM RESOLUTION REPORT ASL2003:100 2006/06/21 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The timing problem on the 00/BH? data at CPUP was resolved. Timing quality returns to normal at 2003, 172, 16:00. END **************************************************************************** DATA PROBLEM REPORT ASL2003:101 2003/05/12 ASL DCC Tyler Storm ASL HRV IU *HN 2003,129,19:40:00 2003,136,19:05:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The channels from the N/S STS-1 are dead. END PROBLEM RESOLUTION REPORT ASL2003:101 2003/05/16 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The HRV station operator returned the N/S STS-1 to operation at 2003, 136, 19:05. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2003:104 2003/05/19 ASL DCC Valerie Peyton ASL MIDW IU 00/*H2 2003,138,09:44:00 2003,140,23:53:00 Problem Description NOISE SEED COMMENT REFERENCE C 4555 High noise levels render data only marginally useable. We see a pulse in the MIDW 54000 2 component data on day 2003, 138 followed by higher noise levels from 10Hz to 1.4Hz (5 - 30 dB too high), as well as from 0.1Hz down through all the low frequencies (5 - 40 dB too high). Data are still useable, but only with caution, as the response is pretty much invalid, except in the mid-periods (1.5Hz - 0.14Hz). END PROBLEM RESOLUTION REPORT ASL2003:104 2003/05/30 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The low frequency noise on the MIDW 54000 2 component disappears at 2003, 140, 23:53. It disappears as swiftly and mysteriously as it appeared. The high frequency noise problem is not completely resolved. For the full timespan of the continuation of the high frequency problem, please see ASL2003:120. END **************************************************************************** DATA PROBLEM REPORT ASL2003:105 2003/05/19 ASL DCC Valerie Peyton ASL MDJ IC 20/*NZ 2002,198,09:32:00 2003,104,02:55:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The Z component of the FBA23 at MDJ is dead. A replacement instrument has been sent. END PROBLEM RESOLUTION REPORT ASL2003:105 2003/05/19 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The MDJ FBA23 was replaced on 2003, 104, 02:55. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2003:102 2003/05/15 ASL DCC Valerie Peyton ASL SAML IU 10/*H1 2003,125,16:25:00 2004,213,14:52:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4625 Invalid instrument response. The 1 component of the CMG3-T-B at SAML is broken. The response amplitude is either too low or too high from 12.4 Hz on down. The problem will not be fixed until we can replace the instrument. END PROBLEM RESOLUTION REPORT ASL2003:102 2004/09/10 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION All three components of the SAML CMG3T-B recovered when the instrument was recentered. Data quality returns to normal at 2004, 213, 14:52. END **************************************************************************** DATA PROBLEM REPORT ASL2003:103 2003/05/16 ASL DCC Valerie Peyton ASL ANMO IU 10/*HZ 2003,135,17:47:00 2003,136,16:25:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4625 Invalid instrument response. Something happened to the Z component of the CMG3-T-B at ANMO. Perhaps it was hit by lightning. Regardless, noise levels on this component are so high that the data are not useable. The PSD is ~20dB too high in the high frequencies (19Hz - 8Hz); in the mid frequencies (8Hz - 0.1Hz) it is 2 - 10dB too high; then it is ~33dB too high all the way through the low frequencies (0.1Hz - 0.001Hz). END PROBLEM RESOLUTION REPORT ASL2003:103 2003/05/16 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION An ASL field engineer was able to fix the Z component of the ANMO CMG3-T-B at 2003, 136, 16:25. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2003:130 2003/06/10 ASL DCC Valerie Peyton ASL TIXI IU 00/*HE 2003,161,06:41:00 2003,161,23:30:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The E component of the STS1 at TIXI has fallen against one of the stops. Data are unuseable. END PROBLEM RESOLUTION REPORT ASL2003:130 2003/06/11 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The E component of the STS1 at TIXI appears to have come back to center of its own accord. Data quality returns to normal at 2003, 161, 23:30. END **************************************************************************** DATA PROBLEM REPORT ASL2003:139 2003/06/23 ASL DCC Valerie Peyton ASL PMG IU */* 2003,164,08:35:00 2003,169,00:13:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 454 Timing MAY be in error, as GPS system is not operating consistently. The GPS system at PMG is not functioning properly during this time period. Timing accuracy cannot be guaranteed. END PROBLEM RESOLUTION REPORT ASL2003:139 2003/06/23 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION An ASL field engineer was able to fix the GPS system at PMG by resetting the VCO value for the QVI master board in the software. Timing quality returns to normal at 2003, 169, 00:13. END **************************************************************************** DATA PROBLEM REPORT ASL2003:133 2003/06/11 ASL DCC Valerie Peyton ASL PMG IU 00/LDO 2003,159,00:00:00 2003,159,00:00:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE C 4215 Time uncertain; error less than 1 second. The manner in which Paroscientific microbarograph data are sampled introduces known, uncorrectable timing errors. Microbarograph data from a Paroscientific microbarograph are collected through a serial port, and not obtained via a proper digitizer. Once a second the system "requests" a data point from the microbarograph. The time stamp given each data point is the time at which the request for data point was made. There is no way to determine precisely when each data point was sampled. The timing error introduced by this sampling method is less than 1 second. END PROBLEM RESOLUTION REPORT ASL2003:133 2003/06/11 ASL DCC Valerie Peyton Description of Problem Resolution COMMENT As long as the Paroscientific microbarograph is attached to a serial port and not to a proper digitizing board, this timing ambiguity will remain. END **************************************************************************** DATA PROBLEM REPORT ASL2003:134 2003/06/12 ASL DCC Valerie Peyton ASL PMG IU * 1998,049,05:18:00 1998,130,13:30:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 452 Timing IS in error, as clock is unlocked. The PMG station clock is unlocked from the GPS timing standard. Timing is unreliable. END PROBLEM RESOLUTION REPORT ASL2003:134 2003/06/12 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The PMG station operator accidentally plugged the GPS receiver cable into the wrong port while swapping out tape drives. The error was not found for a couple of months. At 1998, 130, 13:30 the station operator corrected the problem, and timing quality returns to normal. END **************************************************************************** DATA PROBLEM REPORT ASL2003:131 2003/06/10 ASL DCC Valerie Peyton ASL PMG IU * 1993,253,02:00:00 1993,273,02:25:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. Station installation and maintenance is being performed during this time frame. Expect variable data quality, tests, and calibrations. END PROBLEM RESOLUTION REPORT ASL2003:131 2003/06/10 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Station maintenance at PMG ends at 1993, 273, 02:25. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2003:132 2003/06/11 ASL DCC Valerie Peyton ASL PAB IU */* 2003,111,19:35:00 2003,116,10:50:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 452 Timing IS in error, as clock is unlocked. The PAB clock is unlocked during this time period. Timing quality cannot be guaranteed. END PROBLEM RESOLUTION REPORT ASL2003:132 2003/06/11 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION There was some construction activity going on at PAB during this time frame. Quite likely the clock failure was an accidental by-product of this activity. Normal timing quality resumes at 2003, 116, 10:50. END **************************************************************************** DATA PROBLEM REPORT ASL2003:137 2003/06/19 ASL DCC Valerie Peyton ASL MSKU IU */* 2003,167,00:00:00 2003,172,10:15:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. ASL field engineers are on-site at MSKU performing station maintenance. Expect variable data quality, tests, and calibrations. END **************************************************************************** DATA PROBLEM REPORT ASL2003:138 2003/06/23 ASL DCC Valerie Peyton ASL BILL IU 00/*HE 2003,172,10:27:00 2003,173,03:21:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The E component of the STS1 at BILL is pegged. Data are unuseable. END PROBLEM RESOLUTION REPORT ASL2003:138 2003/06/23 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The BILL station operator recentered the E component of the STS1 at 2003, 173, 03:21. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2003:135 2003/06/16 ASL DCC Valerie Peyton ASL MAJO IU */* 2003,158,00:00:00 2003,165,00:42:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 452 Timing IS in error, as clock is unlocked. The MAJO GPS timing system is unlocked from the GPS standard during this time frame. Timing in the data is incorrect. END PROBLEM RESOLUTION REPORT ASL2003:135 2003/06/16 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The MAJO operator was able to repair the GPS timing system. Timing quality returns to normal at 2003, 165, 00:42. END **************************************************************************** DATA PROBLEM REPORT ASL2003:136 2003/06/18 ASL DCC Valerie Peyton ASL ADK IU */* 2003,167,16:05:00 2003,184,14:20:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 454 Timing MAY be in error, as GPS system is not operating consistently. The ADK clock is drifting swiftly in the negative direction. The GPS receiver is locked onto the GPS satellite, and it is trying to correct the clock drift. Untill the drift is arrested completely, timing quality cannot be guaranteed. END PROBLEM RESOLUTION REPORT ASL2003:136 2003/07/09 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The ADK clock drift has stopped as of 2003, 184, 14:20. Timing quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2003:128 2003/06/06 ASL DCC Valerie Peyton ASL TSUM IU 10/*H* 2002,040,15:55:00 2002,040,15:55:00 Problem Description NOISE SEED COMMENT REFERENCE C 4510 Channel has frequent spiking. All three channels of the STS2 at TSUM are showing coherent noise. This coherent noise can be described as variable-amplitude spiking which has a period of roughly 358 seconds. The amplitude of this noise is generally highest on the E component. There are intermittant periods of time during which this coherent noise is absent. These periods last up to 2 days. END **************************************************************************** DATA PROBLEM REPORT ASL2003:129 2003/06/09 ASL DCC Valerie Peyton ASL PMG IU */* 2003,159,00:00:00 2003,169,02:20:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. ASL field engineers are on-site at PMG performing station maintenance. Expect variable data quality, tests, and calibrations. END PROBLEM RESOLUTION REPORT ASL2003:129 2003/06/18 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION ASL field engineers left PMG in excellent working condition at 2003, 169, 02:20. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2003:122 2003/06/02 ASL DCC Valerie Peyton ASL RAR IU 00/LDO 2003,147,03:00:00 2003,147,03:00:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE C 4215 Time uncertain; error less than 1 second. The manner in which Paroscientific microbarograph data are sampled introduces known, uncorrectable timing errors. Microbarograph data from a Paroscientific microbarograph are collected through a serial port, and not obtained via a proper digitizer. Once a second the system "requests" a data point from the microbarograph. The time stamp given each data point is the time at which the request for data point was made. There is no way to determine precisely when each data point was sampled. The timing error introduced by this sampling method is less than 1 second. END PROBLEM RESOLUTION REPORT ASL2003:122 2003/06/02 ASL DCC Valerie Peyton Description of Problem Resolution COMMENT As long as the Paroscientific microbarograph is attached to a serial port and not to a proper digitizing board, this timing ambiguity will remain. END **************************************************************************** DATA PROBLEM REPORT ASL2003:123 2003/06/05 ASL DCC Valerie Peyton ASL QSPA IU 20/*H* 2003,155,05:11:00 2003,188,07:05:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. All three channels of the STS2 are pegged. Because of tilt in the vault, it is no longer possible to recenter the instrument remotely. Because of the remoteness of the vault, it will not be possible to fix the instrument until the beginning of austral summer. END PROBLEM RESOLUTION REPORT ASL2003:123 2003/07/08 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The QSPA station operator was able to make a mid-winter trip to the station and relevel the STS2. "Warm" weather, low winds, ingenuity, and cautious bravery made this possible. Data quality returns to normal at 2003, 188, 07:05. END **************************************************************************** DATA PROBLEM REPORT ASL2003:120 2003/05/30 ASL DCC Valerie Peyton ASL MIDW IU 00/*H2 2003,140,23:53:00 2003,150,05:30:00 Problem Description HIGH FREQUENCY NOISE SEED COMMENT REFERENCE C 4502 Channel has intermittant high frequency noise. The MIDW 54000 2 component is displaying intermittant high frequency pulses. These pulses corrupt the instrument response from 10Hz to 1.8Hz. These pulses appear to be caused by an unidentified problem in the digitizer. We are investigating their cause with the hopes of finding a solution. END PROBLEM RESOLUTION REPORT ASL2003:120 2003/06/05 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The high frequency pulses on the MIDW 54000 2 component appear to be gone by 2003, 150, 05:30. We have no idea where they came from or where they went. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2003:121 2003/05/30 ASL DCC Valerie Peyton ASL MIDW IU 00/*HZ 2003,149,20:57:00 2003,152,01:52:00 Problem Description NOISE SEED COMMENT REFERENCE C 4555 High noise levels render data only marginally useable. After changing tapes on 2003, 149, the MIDW station operator reset the system. This system reset caused a noise problem on the Z component, similar to a noise problem recently observed on the 2 component (see ASL2003:104 & ASL2003:120). Noise levels are abnormally high from 10Hz to 1.0Hz (5 - 20 dB too high), as well as from 0.1Hz down through all the low frequencies (5 - 25 dB too high). Data are still useable, but only with caution, as the response is pretty much invalid, except in the mid-periods (1.0Hz - 0.1Hz). The noise appears to be caused by an unidentified problem in the digitizer. We are investigating the cause with the hopes of finding a solution. END PROBLEM RESOLUTION REPORT ASL2003:121 2003/06/05 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The low frequency noise on the MIDW 54000 Z component is gone by 2003, 152, 01:52. It disappears as swiftly and mysteriously as it appeared. The high frequency noise problem is not completely resolved. For the full timespan of the continuation of the high frequency problem, please see ASL2003:125. END **************************************************************************** DATA PROBLEM REPORT ASL2003:126 2003/06/05 ASL DCC Valerie Peyton ASL MIDW IU */* 2002,184,00:00:00 2003,154,04:40:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 454 Timing MAY be in error, as GPS system is not operating consistently. There appears to be a problem with the timing system at MIDW. The clock slews wildly every time the station operator resets the system. Each slewing event causes the clock to gain up to 0.3 seconds in a matter of days. Timing quality cannot be guaranteed during this time period. Data should be used with caution. END PROBLEM RESOLUTION REPORT ASL2003:126 2003/06/19 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The GPS system at MIDW seems to be working fine now. Timing quality returns to normal at 2003, 154, 04:40. END **************************************************************************** DATA PROBLEM REPORT ASL2003:127 2003/06/06 ASL DCC Valerie Peyton ASL TSUM IU * 1995,315,06:14:00 1995,317,21:30:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. Station maintenance is being performed on TSUM at this time. Expect variable data quality, tests, and calibrations. END PROBLEM RESOLUTION REPORT ASL2003:127 2003/06/06 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION TSUM station maintenance ended at 1995, 317, 21:30. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2003:124 2003/06/05 ASL DCC Valerie Peyton ASL YSS IU 00/*H* 2003,155,01:24:00 2003,155,03:32:00 Problem Description OTHER SEED COMMENT REFERENCE C 1836 Instrument maintenance. Tests may be in progress. The YSS station operator was relevelling the STS1 seismomters during this time. END PROBLEM RESOLUTION REPORT ASL2003:124 2003/06/05 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The seismometer work at YSS lasted just over 2 hours. Data quality returns to normal at 2003, 155, 03:32. END **************************************************************************** DATA PROBLEM REPORT ASL2003:125 2003/06/05 ASL DCC Valerie Peyton ASL MIDW IU 00/*HZ 2003,152,01:52:00 2003,153,22:28:00 Problem Description HIGH FREQUENCY NOISE SEED COMMENT REFERENCE C 4502 Channel has intermittant high frequency noise. The Z component of the MIDW 54000 has excess high frequency noise from 10 Hz to 1.5 Hz. Noise levels are 4dB to 10dB too high in this frequency band. We believe this noise is being caused by a digitizer problem, but we have yet to track down and fix the source. END PROBLEM RESOLUTION REPORT ASL2003:125 2003/06/25 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The noise on the Z component of the 54000 at MIDW appears to have disappeared as mysteriously as it appeared. Noise levels are now back to what they were before 2003, 149, 20:57. We are assuming that these noise levels are normal. No further action will be taken at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2003:151 2003/07/15 ASL DCC Valerie Peyton ASL MAKZ IU */* 2003,132,12:04:00 2003,358,07:30:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 454 Timing MAY be in error, as GPS system is not operating consistently. The QVI board at MAKZ appears to be malfunctioning. This is causing the GPS system to not work properly. Timing quality cannot be guaranteed, and data may be mistimed. END PROBLEM RESOLUTION REPORT ASL2003:151 2004/02/27 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The QVI board at MAKZ was replaced and timing quality returns to normal at 2003, 358, 07:30. END **************************************************************************** DATA PROBLEM REPORT ASL2003:152 2003/07/15 ASL DCC Valerie Peyton ASL LVC IU 10/*H* 2003,195,10:41:00 2003,238,01:55:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. All three channels of the CMG3-T at LVC are producing digitizer noise. The problem began during an extended data outage, so the source (and exact start time) is not yet determined. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2003:152 2003/08/26 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The LVC station operator was able to return the CMG3-T to working condition. Data quality returns to normal at 2003, 238, 01:55. END **************************************************************************** DATA PROBLEM REPORT ASL2003:150 2003/07/07 ASL DCC Valerie Peyton ASL MA2 IU 00/*HN 2003,186,06:21:00 2003,188,00:25:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The N component of the STS1 at MA2 has fallen against one of its stops. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2003:150 2003/07/07 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The MA2 station operator recentered the STS1 N component. Data quality returns to normal at 2003, 188, 00:25 END **************************************************************************** DATA PROBLEM REPORT DMCQC2015:0211 2015/10/08 IRIS DMC Gillian Sharer DMC J61A TA ?HE 2015,226,12:30:00 2015,264,14:05:00 Problem Description INVALID RESPONSE Starting on August 14 2015 ~12:30 UTC, TA.J61A.?HE started having intermittent issues with differential output, leading to amplitudes of 50% of normal. Time periods where the amplitudes are highly suspect are: 2015.226 12:30 - 2015.228 12:45 UTC 2015.235 10:25 - 2015.236 03:30 UTC 2015.257 07:30 - 2015.264 14:05 UTC END PROBLEM RESOLUTION REPORT DMCQC2015:0211 2015/10/08 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The problem was fixed by a Q330 replacement on September 21 2015. The station resumed normal operation under the network code N4. END **************************************************************************** DATA PROBLEM REPORT DMCQC2015:0212 2015/10/08 IRIS DMC Gillian Sharer DMC F36B N4 ?HN 2015,238,18:28:00 2015,265,21:20:00 Problem Description INVALID RESPONS On August 26 2015 ~18:28 UTC, N4.F36B.?HN experienced a sudden drop in DC offset of ~2500 counts accompanied by a reduction in amplitudes of ~50%. This may be the result of a differential output problem. END PROBLEM RESOLUTION REPORT DMCQC2015:0212 2015/10/08 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION N4.F36B resumed normal operation after the sensor and host box were replaced on September 22 2015 21:20 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2015:0210 2015/10/08 IRIS DMC Gillian Sharer DMC J61A TA ?HE 2015,102,13:30:00 2015,102,18:05:00 Problem Description INVALID RESPONS For about 4.5 hours on April 12 2015, TA.J61A.?HE had an apparent problem with its differential output. Its DC offset dropped by ~2500 counts and its amplitudes are highly suspect from 13:30 to 18:05 UTC. END PROBLEM RESOLUTION REPORT DMCQC2015:0210 2015/10/08 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The problem spontaneously resolved, and TA.J61A.?HE recovered to normal amplitudes and DC offset. END **************************************************************************** DATA PROBLEM REPORT DMCQC2015:0217 2015/10/09 IRIS DMC Gillian Sharer DMC M19K TA * 2015,200,05:13:00 2015,229,07:16:00 Problem Description DATA DROPOUTS From July 19 2015 05:13 UTC - August 17 2015 07:16 UTC, TA.M19K was plagued by recurrent digitizer rebooting. A service visit found that there was moisture in the vault, the charge controller was visibly damaged, and the batteries were not functioning properly. END PROBLEM RESOLUTION REPORT DMCQC2015:0217 2015/10/09 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION TA.M19K resumed normal operation after the charge controller and batteries were replaced. END **************************************************************************** DATA PROBLEM REPORT DMCQC2015:0215 2015/10/09 IRIS DMC Gillian Sharer DMC G65A N4 ?H? 2015,273,09:23:00 2015,273,18:35:00 Problem Description INVALID RESPONSE N4.G65A masses began drifting rapidly on September 30 2015 09:23 UTC. VM3 hit the stops on September 30 2015 12:47 UTC, with VM1 and VM2 also hitting the stops a short time later. The station was not recording accurate seismic data during this time period. END PROBLEM RESOLUTION REPORT DMCQC2015:0215 2015/10/09 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION Normal operation resumed after a mass recenter on September 30 18:35 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2015:0216 2015/10/14 IRIS DMC Gillian Sharer DMC H43A N4 ?H? 2015,243,17:05:00 2015,244,19:10:00 Problem Description DEAD CHANNEL N4.H43A.VM3 suddenly hit its stops on August 31 2015 17:05 UTC, followed shortly by VM1 and VM2. At 17:54 UTC, all 3 mass channels came off the stops but were not centered. At this time, the seismic channels started returning digitizer noise only. END PROBLEM RESOLUTION REPORT DMCQC2015:0216 2015/10/14 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The problem resolved spontaneously and N4.H43A.?H? began recoding normal seismic data again on September 1 2015 ~19:10 UTC. In addition, there was a successful mass recenter at 23:17 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2015:0213 2015/10/09 IRIS DMC Gillian Sharer DMC M20K TA ?H? 2015,190,01:52:00 2015,237,19:00:00 Problem Description LOW FREQUENCY NOISE Following a digitizer reboot on July 9 2015 01:52 UTC, TA.M20K.?H? started having recurring pings on its U, V, and W elements. At times these were occurring at a rate of ~40/day. END PROBLEM RESOLUTION REPORT DMCQC2015:0213 2015/10/09 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The problem resolved after the Q330 was replaced on August 25 2015 19:00 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2015:0214 2015/10/09 IRIS DMC Gillian Sharer DMC O20K TA ?H? 2015,210,02:36:00 2015,210,06:18:00 Problem Description INVALID RESPONSE TA.O20K.VM2 suddenly came up against the stops on July 29 2015 02:36 UTC. While it was at the stops, O20K.?H? did not record accurate seismic data. END PROBLEM RESOLUTION REPORT DMCQC2015:0214 2015/10/09 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION A mass recenter on July 29 2015 06:18 UTC restored normal station operation. END **************************************************************************** DATA PROBLEM REPORT ASL2003:155 2003/07/18 ASL DCC Valerie Peyton ASL MIDW IU 00/*HZ 2003,198,21:03:00 2003,351,03:39:00 Problem Description NOISE SEED COMMENT REFERENCE C 4555 High noise levels render data only marginally useable. The Z component of the 54000 at MIDW is once more exhibiting noise problems. Noise levels are abnormally high from 10Hz to 1.0Hz (5 - 20 dB too high), as well as from 0.1Hz down through all the low frequencies (5 - 25 dB too high). Data are still useable, but only with caution. The noise appears to be caused by an unidentified problem in the digitizer. We are investigating the cause with the hopes of finding a solution. END PROBLEM RESOLUTION REPORT ASL2003:155 2003/12/19 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION The broken KS54000 was replaced with an STS-2. END **************************************************************************** DATA PROBLEM REPORT ASL2003:156 2003/07/21 ASL DCC Valerie Peyton ASL KBS IU 00/*HZ 2003,199,12:43:00 2003,204,13:36:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The Z component of the STS1 at KBS has fallen against one of the stops. It appears that the mass moved off center in response to a rapid rise in vault temperature (so far, the temperature has risen ~16 degrees Celcius in 5 days). We are looking into the cause of the temperature change, and hoping that the instrument can be recentered. Meanwhile, data are not useable. END PROBLEM RESOLUTION REPORT ASL2003:156 2003/07/31 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The KBS station operator recentered the Z component of the STS1. Data quality returns to normal at 2003, 204, 13:36. END **************************************************************************** DATA PROBLEM REPORT ASL2003:153 2003/07/15 ASL DCC Valerie Peyton ASL ANMO IU 10/*HZ 2003,191,22:35:00 2003,195,18:55:00 Problem Description NOISE SEED COMMENT REFERENCE C 4625 Invalid instrument response. Something happened to the Z component of the CMG3-T-B at ANMO. Perhaps it was hit by lightning. Regardless, noise levels on this component are excessively high in the low frequencies. The PSD is ~5dB too high in the high frequencies (19Hz - 6.5Hz); in the mid frequencies (6.5Hz - 0.1Hz) it is 2 - 5dB too high; then it is ~30dB too high all the way through the low frequencies (0.1Hz - 0.001Hz). END PROBLEM RESOLUTION REPORT ASL2003:153 2003/07/15 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION An ASL field engineer was able to fix the Z component of the ANMO CMG3-T-B at 2003, 195, 18:55. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2003:154 2003/07/17 ASL DCC Valerie Peyton ASL TIXI IU 00/*HN 2003,186,11:33:00 2003,299,02:55:00 Problem Description SPIKES SEED COMMENT REFERENCE C 4525 Channel has spiking and other data glitches. The N component of the STS1 at TIXI is experiencing small mass motions that are causing large spikes in the data. We are hoping that the mass motions are being caused by thawing of the ground, and that all the spikes will disappear once summer ends and the ground re-freezes. END PROBLEM RESOLUTION REPORT ASL2003:154 2004/03/15 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The problem on the N component of the STS1 at TIXI appears to have resolved itself. Data quality returns to normal at 2003, 299, 02:55. END **************************************************************************** DATA PROBLEM REPORT ASL2003:159 2003/07/30 ASL DCC Valerie Peyton ASL ULN IU */* 2003,203,11:20:00 2003,267,20:52:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 452 Timing IS in error, as clock is unlocked. The GPS system at ULN is currently completely unlocked from the GPS timing standard. Timing in the data is incorrect. END PROBLEM RESOLUTION REPORT ASL2003:159 2003/09/25 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The GPS system was replaced and locked back onto the GPS timing standard at 2003, 267, 20:52. Timing in the data is correct as of this time. END **************************************************************************** DATA PROBLEM REPORT ASL2003:157 2003/07/23 ASL DCC Valerie Peyton ASL CHTO IU */* 2003,176,05:45:00 2003,195,04:46:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 454 Timing MAY be in error, as GPS system is not operating consistently. The GPS system at CHTO is malfunctioning during this time period. Timing quality cannot be guaranteed. END PROBLEM RESOLUTION REPORT ASL2003:157 2003/07/23 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Timing quality at CHTO returns to normal at 2003, 195, 04:46. END **************************************************************************** DATA PROBLEM REPORT ASL2003:158 2003/07/30 ASL DCC Valerie Peyton ASL BILL IU 00/*HE 2003,206,22:00:00 2003,208,04:08:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The mass of the E STS1 at BILL has fallen against one of its stops. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2003:158 2003/07/30 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The BILL station operator recentered the E STS1. Data quality returns to normal at 2003, 208, 04:08. END **************************************************************************** DATA PROBLEM REPORT ASL2003:140 2003/06/23 ASL DCC Valerie Peyton ASL MSKU IU 00/*HN 10/*HN 2003,170,09:00:00 2003,170,09:00:00 Problem Description NOISE SEED COMMENT REFERENCE C 4502 Channel has intermittant high frequency noise. There is a strange elevation in the background noise of the STS1 N component at MSKU. Noise levels are up to 10dB higher than they should be from 5Hz on up into the highest frequencies recorded by the instrument. The cause of this elevated noise is unknown. Comparison of the STS1 N data with data from the N component of the CMG3-T appears to indicate that we are not seeing background noise, but instrument noise on the STS1 N. We will continue to investigate the problem. The noise appears to come and go, and the amplitude of the noise varies with time. SUPPLEMENT 2003, 212 We actually _are_ seeing the same elevated noise levels on the N component of the CMG3-T. Since both N components are seeing this high frequency noise, we are assuming that this may simply be a new portion of the background noise signature for MSKU. END **************************************************************************** DATA PROBLEM REPORT ASL2003:141 2003/06/24 ASL DCC Valerie Peyton ASL BILL IU 00/*HE 2003,174,12:50:00 2003,176,05:12:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The E component of the STS1 at BILL has fallen against one of its stops. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2003:141 2003/06/25 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The BILL station operator recentered the E component of the STS1 at 2003, 176, 05:12. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2003:144 2003/06/26 ASL DCC Valerie Peyton ASL XMAS IU */* 2002,327,23:30:00 2003,352,21:54:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 454 Timing MAY be in error, as GPS system is not operating consistently. The GPS system at XMAS is malfunctioning, and data are consequently mistimed for significant portions of each day. END PROBLEM RESOLUTION REPORT ASL2003:144 2004/02/23 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The GPS system at XMAS was replaced and timing quality returns to normal at 2003, 352, 21:54. END **************************************************************************** DATA PROBLEM REPORT ASL2003:145 2003/06/26 ASL DCC Valerie Peyton ASL HIA IC 10/*H* 2002,152,04:09:00 2003,285,11:16:00 Problem Description DATA GLITCHES SEED COMMENT REFERENCE C 4525 Channel has spiking and other data glitches. The GS13 at HIA is producing intermittant bad data. There are "events" that look like data glitches. All three channels have nearly identical waveforms during these short-lived "events". Genuine seimsic events are also being recorded. Since the data glitches show up on all three channels simultaneously, we suspect that either the digitizer board, or the power board, is beginning to fail. Data should be used with caution. END PROBLEM RESOLUTION REPORT ASL2003:145 2003/12/04 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The last observed bad data on the GS13 at HIA was at 2003, 285, 11:16. We do not know what caused the problem or what solved it, but data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2003:142 2003/06/25 ASL DCC Valerie Peyton ASL TSUM IU 10/*H* 2003,118,07:58:00 2003,150,15:16:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. All three channels of the TSUM STS2 are down during this time period. END PROBLEM RESOLUTION REPORT ASL2003:142 2003/06/25 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION ASL field engineers were able to repair the TSUM STS2 during a maintenance visit. Data quality returns to normal at 2003, 150, 15:16. END **************************************************************************** DATA PROBLEM REPORT ASL2003:143 2003/06/26 ASL DCC Valerie Peyton ASL TIXI IU 00/*HE 2003,176,16:56:00 2003,180,04:46:00 Problem Description SPIKES SEED COMMENT REFERENCE C 4525 Channel has spiking and other data glitches. The E component of the STS1 at TIXI is experiencing spikes that cause the mass to move to the stop. The predominant direction of the spikes is down (W). Data between spikes is fine, but the spikes are generally only a few minutes apart. END PROBLEM RESOLUTION REPORT ASL2003:143 2003/06/30 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The spiking on the E component of the STS1 at TIXI has stopped as suddenly as it started. Data quality returns to normal at 2003, 180, 04:46. END **************************************************************************** DATA PROBLEM REPORT ASL2003:148 2003/07/03 ASL DCC Valerie Peyton ASL LSA IC 00/*HE 2003,184,02:03:00 2003,186,02:30:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The E component of the STS1 at LSA is against one of the stops. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2003:148 2003/07/07 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The LSA station operator recentered the E component of the STS1 at 2003, 186, 02:30. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2003:149 2003/07/07 ASL DCC Valerie Peyton ASL BILL IU 00/*HE 2003,187,19:38:00 2003,189,04:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The E component of the STS1 at BILL has fallen against one of its stops. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2003:149 2003/07/08 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The BILL station operator recentered the STS1 E component. Data quality returns to normal at 2003, 189, 04:00. END **************************************************************************** DATA PROBLEM REPORT ASL2003:146 2003/06/27 ASL DCC Valerie Peyton ASL MIDW IU 00/*HZ 2003,168,22:02:00 2003,178,10:40:00 Problem Description SPIKES SEED COMMENT REFERENCE C 2008 Long period "burps". There are low frequency swings on the Z component of the 54000 at MIDW. The swings are like broad spikes that have a width of 1 to 8 minutes. END PROBLEM RESOLUTION REPORT ASL2003:146 2003/06/30 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The low frequency swings on the Z component of the 54000 at MIDW have disappeared as mysteriously and suddenly as they appeared. Their cause is still unknown, but at least they are no longer occurring. Data quality returns to normal at 2003, 178, 10:40. END **************************************************************************** DATA PROBLEM REPORT ASL2003:147 2003/06/27 ASL DCC Valerie Peyton ASL KOWA IU */* 2003,180,00:00:00 2003,184,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. ASL field engineers are on-site at KOWA performing station maintenance. Expect variable data quality, tests, and calibrations. END PROBLEM RESOLUTION REPORT ASL2003:147 2003/07/31 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION ASL field engineers found KOWA inoperational, and unfortunately they had to leave KOWA inoperational. It will require several miracles to return the station to operating order, and our field engineers ran out of the ability to work miracles. We hope to re-install the station at some later date. END **************************************************************************** DATA PROBLEM REPORT ASL2003:170 2003/08/19 ASL DCC Valerie Peyton ASL NWAO IU */* 2003,223,00:13:00 2003,232,17:21:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 452 Timing IS in error, as clock is unlocked. The NWAO GPS timing system is unlocked from the GPS timing standard. Timing in the data is currently incorrect. END **************************************************************************** DATA PROBLEM REPORT ASL2003:173 2003/08/21 ASL DCC Valerie Peyton ASL BBSR IU 10/*N* 2003,047,22:46:00 2003,288,18:24:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The FBA23 at BBSR appears to be dead. All three channels are producing coherent noise. There have been no real earthquakes close and large enough to be recorded by the FBA23, so the jury is still out on whether or not the instrument is completely dead. Until we know better, we are assuming the worst and will replace the instrument as soon as possible. END PROBLEM RESOLUTION REPORT ASL2003:173 2003/10/16 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The FBA23 cable and connectors have been replaced with the help of the BBSR station operator. Data quality returns to normal at 2003, 288, 18:24. END **************************************************************************** DATA PROBLEM REPORT ASL2003:174 2003/08/22 ASL DCC Valerie Peyton ASL BILL IU 00/*HE 2003,233,16:43:00 2003,233,22:38:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The E component of the STS1 at BILL is pegged. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2003:174 2003/08/22 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The BILL station operator has recentered the E component of the STS1 at BILL. Data quality returns to normal at 2003, 233, 22:38. END **************************************************************************** DATA PROBLEM REPORT ASL2003:171 2003/08/20 ASL DCC Valerie Peyton ASL KONO IU */* 2003,225,15:40:00 2003,265,17:45:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 452 Timing IS in error, as clock is unlocked. The GPS system at KONO is not working properly: the system is not able to lock onto the GPS timing standard, and the VCO and drift values are stuck. Data timing is considered incorrect. END PROBLEM RESOLUTION REPORT ASL2003:171 2003/09/24 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The KONO station operator replaced the GPS system with new parts. Timing quality returns to normal at 2003, 265, 17:45. END **************************************************************************** DATA PROBLEM REPORT ASL2003:172 2003/08/21 ASL DCC Valerie Peyton ASL SNZO IU 10/*HN 10/*HE 2003,233,12:16:00 2003,233,15:50:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The horizontal components of the CMG3-T at SNZO were pegged by a local magnitude 7.0 event. The event looks absolutely gorgeous on the 54000 channels, but was too large for the CMG3-T to handle. We are attempting to remotely recenter the CMG3-T, and hope to have it working again soon. END PROBLEM RESOLUTION REPORT ASL2003:172 2003/08/21 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The remote recenter of the CMG3-T at SNZO was successful. Data quality returns to normal at 2003, 233, 15:50. END **************************************************************************** DATA PROBLEM REPORT ASL2003:177 2003/09/03 ASL DCC Valerie Peyton ASL MBWA IU 00/*HZ 2003,243,13:24:00 2003,340,10:08:00 Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE C 2008 Long period "burps". The Z component of the 54000 at MBWA is exhibiting high levels of low frequency noise (from 19Hz down through the low frequencies). The low frequency noise is up to 30dB higher than the low frequency background noise used to be. We think this noise may be related to an instrument problem that occurred on 2003, 224 (see ASL2003:166). We have yet to isolate the source of the problem, but it likely is in the down-hole electronics. If the problem is indeed in the sensor itself, it will not be fixed until we are able to replace it. END PROBLEM RESOLUTION REPORT ASL2003:177 2004/03/04 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The low frequency noise problem on the Z component of the 54000 at MBWA disappeared as mysteriously as it appeared. Data quality returns to normal at 2003, 340, 10:08. END **************************************************************************** DATA PROBLEM REPORT ASL2003:178 2003/09/05 ASL DCC Valerie Peyton ASL KBS IU 10/*HE 2003,247,18:29:00 2004,094,03:00:00 Problem Description NOISE SEED COMMENT REFERENCE C 4504 Channel exibits high levels of low frequency noise. The E component of the STS2 at KBS is exhibiting excessive levels of long period noise. Beginning at 0.15Hz and continuing down through all of the low frequencies, noise levels are 5 to 25dB higher than they should be. Data quality is severely compromised in these frequencies. SUPPLEMENT 2004, 078 The noise problem on the E component of the STS2 at KBS is worsening. Peak noise levels now reach 60dB higher than they should. The highest frequency affected is now 0.1Hz. END PROBLEM RESOLUTION REPORT ASL2003:178 2004/04/12 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The noise problem on the E component of the STS2 at KBS solved itself at 2004, 094, 03:00. We have determined neither the source of the noise, nor its solution. Regardless, data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2003:175 2003/08/22 ASL DCC Valerie Peyton ASL KMBO IU 00/*HN 2003,195,14:00:00 2003,266,07:40:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4625 Invalid instrument response. The response of the STS1 N is slowly degrading. It looks like part of the circuitry in the feedback electronics box is corroding. At 2003, 195, 20:33, the STS1 N's reponse to earthquakes begins to be non-linear. By 2003, 213 even the background noise recorded by the STS1 N shows non-linear response characteristics, and the PSDs show the instrument entering a corrupt version of 360 second period mode. The instrument response is definitely wrong from 0.5Hz down through the low frequencies. END PROBLEM RESOLUTION REPORT ASL2003:175 2003/09/23 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The KMBO station operator installed a new feedback electronics box, which fixed the response problems on the STS1 N component. Data quality returns to normal at 2003, 266, 07:40. END **************************************************************************** DATA PROBLEM REPORT ASL2003:176 2003/08/26 ASL DCC Valerie Peyton ASL RCBR IU 10/*H2 2003,235,17:52:00 2003,238,14:53:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The 2 component (nominal E) of the CMG3-T-B at RCBR is pegged. Data are marginally useable between 2003, 235, 17:52 and 2003, 237, 19:50. After 2003, 237, 19:50, data are no longer useable. END PROBLEM RESOLUTION REPORT ASL2003:176 2003/08/26 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION We were able to remotely recenter the RCBR CMG3-T-B. Data quality returns to normal at 2003, 238, 14:53. END **************************************************************************** DATA PROBLEM REPORT ASL2003:179 2003/09/05 ASL DCC Valerie Peyton ASL MSKU IU 00/*HZ 2003,247,11:55:00 2003,247,11:55:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The Z component of the STS1 at MSKU has fallen against one of its stops. Data are not useable. END **************************************************************************** DATA PROBLEM REPORT ASL2003:162 2003/08/05 ASL DCC Tyler Storm ASL BILL IU 00/*H* 2003,217,05:15:00 2003,219,01:23:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. Channels from the STS-1 instruments are dead. END PROBLEM RESOLUTION REPORT ASL2003:162 2003/08/12 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION Channels are back at 2003,219,01:23:00. END **************************************************************************** DATA PROBLEM REPORT ASL2003:163 2003/08/05 ASL DCC Tyler Storm ASL HRV IU ?HN 2003,214,03:15:00 2003,217,20:23:25 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4625 Invalid instrument response. The N component of the STS1 at HRV has lost half of the double-ended output. The response is 25 to 30dB too low throughout the entire spectrum. END PROBLEM RESOLUTION REPORT ASL2003:163 2003/08/12 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION Problem resolved at 2003,217,20:23:25. END **************************************************************************** DATA PROBLEM REPORT ASL2003:160 2003/07/30 ASL DCC Valerie Peyton ASL GNI IU 00/*HN 2003,204,17:10:00 2003,225,05:10:00 Problem Description SPIKES SEED COMMENT REFERENCE C 4510 Channel has frequent spiking. The N component of the STS1 at GNI is displaying an enormous amount of long- period spiking. Data quality between spikes is good, but the spikes are so frequent that it is hard to find much data between them. We are investigating the problem. END PROBLEM RESOLUTION REPORT ASL2003:160 2003/08/26 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The spiking problem on the N component of the STS1 at GNI fixed itself at 2003, 225, 05:10. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2003:161 2003/07/30 ASL DCC Valerie Peyton ASL COLA IU 10/*HN 10/*HE 2003,211,01:12:00 2003,211,19:17:00 Problem Description SPIKES SEED COMMENT REFERENCE C 4510 Channel has frequent spiking. The N and E channels of the STS2 at COLA are exhibiting regular pulses. The pulses are roughly 100 seconds wide, ~100,000 counts in amplitude, and come in uniform sets of two (up followed by down on the N channel; down followed by up on the E channel). The pulsing on the horizontal channels is mildy periodic, with roughly 700 - 800 seconds between a down pulse and an up pulse; and roughly 2500 - 2600 seconds from one set of down/up pulses to the next. END PROBLEM RESOLUTION REPORT ASL2003:161 2003/07/31 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The pulsing on the N and E channels of the STS2 at COLA has ceased as mysteriously as it began. Data quality returns to normal at 2003, 211, 19:17. END **************************************************************************** DATA PROBLEM REPORT DMCQC2015:0200 2015/07/14 IRIS DMC Gillian Sharer DMC N19K TA * 2015,164,00:00:00 2015,164,19:00:00 Problem Description DEAD CHANNEL From June 13 2015 00:00-19:00 UTC, TA.N19K returned digitizer noise only. END PROBLEM RESOLUTION REPORT DMCQC2015:0200 2015/07/14 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION TA.N19K started sending good data after the sensor was connected. END **************************************************************************** DATA PROBLEM REPORT DMCQC2015:0201 2015/07/14 IRIS DMC Gillian Sharer DMC 146B N4 ?HZ 2015,140,19:03:00 2015,189,15:00:00 Problem Description INVALID RESPONS N4.146B experienced a sudden loss of differential output on May 20, 2015 19:03 UTC, resulting in amplitudes that are approximately 50% of normal. END PROBLEM RESOLUTION REPORT DMCQC2015:0201 2015/07/14 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION Amplitude values returned to normal after the sensor was replaced on 2015.189. END **************************************************************************** DATA PROBLEM REPORT DMCQC2015:0208 2015/10/08 IRIS DMC Gillian Sharer DMC M27K TA ?H? 2015,193,00:00:00 2015,278,23:30:00 Problem Description LOW FREQUENCY NOISE From installation on July 12 2015, the Trillium 120 sensor at TA.M27K suffered from recurrent pings and other noise on its W-element. END PROBLEM RESOLUTION REPORT DMCQC2015:0208 2015/10/08 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The noise issue was fixed on October 05 2915 ~23:30 UTC by a service visit to replace the sensor. END **************************************************************************** DATA PROBLEM REPORT DMCQC2015:0209 2015/10/08 IRIS DMC Gillian Sharer DMC S39B N4 * 2015,193,10:40:00 2015,209,14:24:00 Problem Description DEAD CHANNEL On July 12 2015 10:40 UTC, N4.S39B.?H? suddenly failed and started returning digitizer noise. END PROBLEM RESOLUTION REPORT DMCQC2015:0209 2015/10/08 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION A service visit found that the vault had water inside and that the vault interface box was not energizing the seismic sensor. The interface box was replaced. The Quanterra environmental processor and both the Setra and NCPA barometers were also replaced because of possible water damage. N4.S39B resumed normal data acquisition on July 28 2015 14:24 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2015:0206 2015/07/14 IRIS DMC Gillian Sharer DMC KMSC TA ?HZ 2015,151,16:50:00 2015,170,00:34:00 Problem Description OTHER From May 31 2015 16:50 to June 19 2015 00:34 UTC, TA.KMSC.?HZ experienced spiky behavior along with sudden jumps and dips in dc offset. It recorded seismic energy during this time period, but the amplitudes may not be accurate. END **************************************************************************** DATA PROBLEM REPORT DMCQC2015:0207 2015/09/18 IRIS DMC Gillian Sharer DMC G59A TA * 2015,021,09:15:00 2015,195,23:59:00 Problem Description INVALID RESPONSE Starting on January 21 2015, one or more of TA.G59A.VM[123] channels were up against the stops. The station was not recording accurate seismic data for the last several months of its lifetime, until it was removed in July 2015. END **************************************************************************** DATA PROBLEM REPORT DMCQC2015:0204 2015/07/14 IRIS DMC Gillian Sharer DMC TIGA TA ?HZ 2015,147,13:00:00 2015,180,02:36:00 Problem Description LOW FREQUENCY NOISE Starting on May 27 2015 13:00 UTC, TA.TIGA.?HZ had higher than normal levels of long period noise at periods greater than 20 seconds, most likely due to sensor issues. This noise abruptly and spontaneously stopped on June 29 2015 02:36 UTC. During this time period, the channel continued to record earthquake energy. END **************************************************************************** DATA PROBLEM REPORT DMCQC2015:0205 2015/07/14 IRIS DMC Gillian Sharer DMC X43A TA * 2015,151,22:03:00 2016,184,23:59:00 Problem Description OTHER High amplitude spiky noise (counts upwards of 1000000) has dominated the seismic record of TA.X43A since May 31 2015. The station vault has a long history of water infiltration, and this noise of likely due to corrosion. The sensor is not recording seismic energy at this time. END **************************************************************************** DATA PROBLEM REPORT DMCQC2015:0202 2015/07/14 IRIS DMC Gillian Sharer DMC TIGA TA ?H[ENZ] 2015,142,07:00:00 2015,144,16:45:00 Problem Description OTHER From May 22 2015 07:00 to May 24 2015 16:45 UTC, TA.TIGA recorded only large amplitude spiky noise with counts on the order of 1000000. This noise may be related to corrosion, as the vault has a history of water leaks. END **************************************************************************** DATA PROBLEM REPORT DMCQC2015:0203 2015/07/14 IRIS DMC Gillian Sharer DMC TIGA TA ?HZ 2015,146,17:32:00 2015,147,13:00:00 Problem Description INVALID RESPONSE On May 26 2015 17:32 UTC, the dc offset of TA.TIGA.?HZ suddenly dropped by ~2500 counts and its amplitudes were reduced by ~50%, possibly due to a loss of differential output. The amplitudes and dc offset spontaneously recovered on May 27 13:00 UTC. END **************************************************************************** DATA PROBLEM REPORT ASL2003:166 2003/08/12 ASL DCC Tyler Storm ASL MBWA IU 00/?HZ 2003,224,03:19:45 2003,225,06:50:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The vertical channels from the KS54000 are down. END PROBLEM RESOLUTION REPORT ASL2003:166 2003/08/13 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The vertical channels are back to normal at 2003,225,06:50. END **************************************************************************** DATA PROBLEM REPORT ASL2003:167 2003/08/13 ASL DCC Tyler Storm ASL TATO IU 10/* 2003,224,14:42:00 2003,230,07:37:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. All channels from the STS-2 are unuseable. END PROBLEM RESOLUTION REPORT ASL2003:167 2003/08/18 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The TATO station operator fixed the STS2 at 2003, 230, 07:37. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2003:164 2003/08/05 ASL DCC Tyler Storm ASL TATO IU 10/* 2003,214,03:53:00 2003,220,02:12:23 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. All channels from the STS-2 are unuseable. END PROBLEM RESOLUTION REPORT ASL2003:164 2003/08/12 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION Instrument was reset at 2003,220,02:12:23. END **************************************************************************** DATA PROBLEM REPORT ASL2003:165 2003/08/12 ASL DCC Valerie Peyton ASL BILL IU 00/?HE 2003,219,04:46:00 2003,220,08:40:00 Problem Description OTHER SEED COMMENT REFERENCE C 4010 Channel is down. Shortly after all the channels came back up the mass of the E/W sensor started to drift toward the stop. Data were degraded from 2003,219,04:46 to 2003,220,04:20 The mass pegged at 2003,220,04:20. The channels were dead from 2003,220,04:20 to 2003,220,08:40. END PROBLEM RESOLUTION REPORT ASL2003:165 2003/08/12 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION Back to normal at 2003,220,08:40. END **************************************************************************** DATA PROBLEM REPORT ASL2003:168 2003/08/15 ASL DCC Tyler Storm ASL CASY IU 00/?HZ 2003,026,04:00:00 2003,098,11:55:00 Problem Description OTHER SEED COMMENT REFERENCE C 4010 Channel is down. The mass of the vertical seismometer is against a stop. Data are unuseable. END PROBLEM RESOLUTION REPORT ASL2003:168 2004/04/28 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The Z component of the CASY STS1 came back to center at 2003, 098, 11:55. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2003:169 2003/08/18 ASL DCC Valerie Peyton ASL KBS IU 00/*HN 2003,227,16:18:00 2003,245,13:57:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The N component of the STS1 at KBS is pegged. END PROBLEM RESOLUTION REPORT ASL2003:169 2003/09/03 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The KBS station operator recentered the STS1 N component at 2003, 245, 13:57. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2003:191 2003/09/29 ASL DCC Valerie Peyton ASL TEIG IU */* 2003,263,19:00:00 2003,270,08:25:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. ASL field engineers are at TEIG upgrading the station. Expect tests, calibrations, and variable data quality. Because an orientation test was done, some channels may be mislabeled from 2003, 266, 22:00 - 2003, 267 13:00. Please use these data only with great caution. END PROBLEM RESOLUTION REPORT ASL2003:191 2003/09/29 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The ASL field team left TEIG in fantastic operational order at 2003, 270, 08:25. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2003:192 2003/09/29 ASL DCC Valerie Peyton ASL TEIG IU 00/LDO 2003,263,19:00:00 2003,263,19:00:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE C 4215 Time uncertain; error less than 1 second. The manner in which Paroscientific microbarograph data are sampled introduces known, uncorrectable timing errors. Microbarograph data from a Paroscientific microbarograph are collected through a serial port, and not obtained via a proper digitizer. Once a second the system "requests" a data point from the microbarograph. The time stamp given each data point is the time at which the request for data point was made. There is no way to determine precisely when each data point was sampled. The timing error introduced by this sampling method is less than 1 second. END PROBLEM RESOLUTION REPORT ASL2003:192 2003/09/29 ASL DCC Valerie Peyton Description of Problem Resolution COMMENT As long as the Paroscientific microbarograph is attached to a serial port and not to a proper digitizing board, this timing ambiguity will remain. END **************************************************************************** DATA PROBLEM REPORT ASL2003:190 2003/09/24 ASL DCC Valerie Peyton ASL TIXI IU 00/*HE 2003,262,10:36:00 2003,294,09:31:00 Problem Description SPIKES SEED COMMENT REFERENCE C 4510 Channel has frequent spiking. The E component of the STS1 at TIXI has become unstable. Large mass position changes are causing severe spiking in the data. END PROBLEM RESOLUTION REPORT ASL2003:190 2004/03/15 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The problem on the E component of the STS1 at TIXI appears to have resolved itself. Data quality returns to normal at 2003, 294, 09:31. END **************************************************************************** DATA PROBLEM REPORT ASL2003:195 2003/10/08 ASL DCC Valerie Peyton ASL ANMO IU 10/*HZ 2003,280,10:31:00 2003,329,17:48:00 Problem Description NOISE SEED COMMENT REFERENCE C 4504 Channel exibits high levels of low frequency noise. The Z component of the CMG3-T-B at ANMO is experiencing high levels of low frequency noise. Noise levels are 5 - 25dB higher than they should be, beginning at 0.1 Hz and continuing down through all the lower frequencies. END PROBLEM RESOLUTION REPORT ASL2003:195 2003/11/26 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION After an ASL field engineer locked, unlocked and recentered the CMG3-T-B at ANMO, the low frequency noise problem on the Z component disappeared. Data quality returns to normal at 2003, 329, 17:48. END **************************************************************************** DATA PROBLEM REPORT ASL2003:196 2003/10/08 ASL DCC Valerie Peyton ASL OTAV IU 00/*H* 2003,280,21:09:00 2003,286,19:28:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. All three components of the STS1 at OTAV are currently producing digitizer noise. We suspect the problem is in the acquisition system, and we have asked the station operator to investigate. END PROBLEM RESOLUTION REPORT ASL2003:196 2003/10/14 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The OTAV station operator fixed whatever problem the STS1s were having. Data quality returns to normal at 2003, 286, 19:28. END **************************************************************************** DATA PROBLEM REPORT ASL2003:193 2003/10/02 ASL DCC Valerie Peyton ASL DAV IU 00/*HZ 2003,269,03:22:00 2003,269,03:22:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The Z component of the STS1 at DAV is pegged. Only large events are being recorded, and there is not guarantee that the instrument is responding properly to these events. END **************************************************************************** DATA PROBLEM REPORT ASL2003:194 2003/10/07 ASL DCC Valerie Peyton ASL BILL IU 00/*HE 2003,279,21:03:00 2003,282,01:34:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The E component of the STS1 at BILL has gone to digitizer noise. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2003:194 2003/10/09 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The E component of the STS1 at BILL is fixed as of 2003, 282, 01:34. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2003:199 2003/11/03 ASL DCC Valerie Peyton ASL HKT IU 00/*HN 2003,305,22:34:00 2003,310,20:38:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The N component of the STS1 at HKT is losing mass capture. Data quality begins to be compromised at 2003, 305, 22:34. END PROBLEM RESOLUTION REPORT ASL2003:199 2003/11/07 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The HKT station operator recentered the STS1 N. Data quality returns to normal at 2003, 310, 20:38. END **************************************************************************** DATA PROBLEM REPORT ASL2003:197 2003/10/09 ASL DCC Valerie Peyton ASL PMSA IU 00/*HN 2003,249,19:13:00 2003,249,19:13:00 Problem Description SPIKES SEED COMMENT REFERENCE C 4510 Channel has frequent spiking. The N component of the STS1 at PMSA is exhibiting severe spiking. The frequency is intermittant, but the amplitudes range from hundreds of thousands to millions of counts. END **************************************************************************** DATA PROBLEM REPORT ASL2003:198 2003/10/16 ASL DCC Valerie Peyton ASL MSKU IU */* 2003,247,11:50:00 2003,258,19:00:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 451 Timing MAY be in error, as clock is unlocked. After a data gap of nearly 20 days, MSKU data returns with a bad clock. Timing quality cannot be guaranteed during this time period. END PROBLEM RESOLUTION REPORT ASL2003:198 2003/10/16 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The MSKU station operator fixed the GPS system. Timing quality returns to normal at 2003, 258, 19:00. END **************************************************************************** DATA PROBLEM REPORT ASL2003:180 2003/09/08 ASL DCC Valerie Peyton ASL TRQA IU 10/*H2 2003,248,23:19:00 2003,256,19:10:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The 2 component (nominal E) of the CMG3-T-B at TRQA is pegged. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2003:180 2003/09/15 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The TRQA station operator was able to recenter the CMG3-T-B at 2003, 256, 19:10. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2003:181 2003/09/11 ASL DCC Valerie Peyton ASL TRQA IU 10/*H* 2003,253,18:25:00 2003,256,19:10:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. As a result of an attempt to recenter the CMG3-T-B at TRQA, all three channels are now pegged. It is possible the instrument has accidentally been locked. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2003:181 2003/09/15 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The TRQA station operator was able to unlock and recenter the CMG3-T-B at 2003, 256, 19:10. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2003:184 2003/09/22 ASL DCC Valerie Peyton ASL TIXI IU 00/*HE 2003,262,10:36:00 2003,265,13:30:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4620 Incorrect instrument response for low frequencies only During a routine recentering of the STS1 E component at TIXI, the station operator accidentally left the instrument in free-period mode. Data quality is compromised by an inaccurate response to ground motion. END PROBLEM RESOLUTION REPORT ASL2003:184 2003/09/22 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The TIXI station operator fixed the STS1 E component at 2003, 265, 13:30. Data quality and instrument response return to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2003:182 2003/09/12 ASL DCC Valerie Peyton ASL CASY IU HH* SH* 10/*H* 1996,050,00:00:00 2004,104,00:00:00 Problem Description INVALID RESPONSE The response of the STS2 at CASY appears to be roughly 6dB too low across the entire response spectrum. We believe that somehow the instrument is only producing half of its double-ended output. Except for a suspected 6dB loss in amplitude, the STS2 response has the correct shape and characteristics. END PROBLEM RESOLUTION REPORT ASL2003:182 2004/04/28 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION With the help of Meredith Nettles, we were able to determine that the STS2 at CASY was indeed producing only half its double-ended output. Since the data are otherwise good, we are correcting this in the dataless by reporting the instrument sensitivity as 8000 Vm/s, instead of the manufacturer's reported 20000 Vm/s. This corrected sensitivity in the dataless goes all the way back to the installation of the instrument on 1996, 050. All IU/CASY dataless volumes produced on or after 2004, 104 have the corrected STS2 sensitivity values. If your IU/CASY dataless volume was produced before 2004, 104, please obtain a new one by contacting the IRIS DMC, or by accessing our ftp site (aslftp.cr.usgs.gov). END **************************************************************************** DATA PROBLEM REPORT ASL2003:183 2003/09/18 ASL DCC Valerie Peyton ASL MBWA IU */* 2003,260,10:26:00 2003,261,14:12:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. The station operator is at MBWA trying to diagnose a problem with the 54000. Expect variable data quality and tests. END PROBLEM RESOLUTION REPORT ASL2003:183 2003/09/25 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The station operator left MBWA at 2003, 261, 14:12. Data quality returns to normal at this time. Unfortunately, the problem with the 54000 remained un-diagnoseable. END **************************************************************************** DATA PROBLEM REPORT DMC1996:004 1996/10/17 IRIS DMC Robert Casey DMC MSVF II ALL 1996,207,00:00:00 1996,207,00:00:00 Problem Description POLARITY REVERSED SOD products produced on or before 10/11/96 may have polarity-reversed waveforms, an anomaly from the miniSEED building utility of rdseed v4.12b, an intermediate version of rdseed that SOD was implementing. This version of rdseed was never released to the public, and all future versions of rdseed do not experience this reversal problem. Thanks go to Goran Ekstrom for bringing this problem to light. SOD is now implementing the latest version of rdseed, which is v4.14. END **************************************************************************** DATA PROBLEM REPORT DMCQC2007:070 2008/10/02 IRIS DMC Mary Templeton DMC HLID US ?H? 2006,029,22:30:00 2006,060,23:24:00 Problem Description DATA DROPOUTS Data gaps ensued when the Q680 digitizer at HLID was replaced with the current Q330 digitizer. Gaps occur every 750 to 800 seconds and last between 15 and 60 seconds, approximately. END PROBLEM RESOLUTION REPORT DMCQC2007:070 2008/10/02 IRIS DMC Mary Templeton Description of Problem Resolution RESOLUTION Gaps were being introduced by a memory configuration issue on the server receiving telemetered Q330 data. When server memory was reconfigured, the gaps ceased. END **************************************************************************** DATA PROBLEM REPORT DMC1996:005 1996/10/30 IRIS DMC Rick Benson DMC KIP G ??? 1996,047,00:00:00 1996,047,00:00:00 Problem Description INCORRECT TIME It has been noted that there is a systematic difference in timing for the station KIP when the IRIS and the Geoscope stations are compared. The Geoscope operators acknowledge that there is at least a 450ms delay, beginning in Dec. 1995. No time corrections are given at this time. This DPR refers to a specific observation for one event on this day, and a 4.5 second delay occurs. (An order of magnitude greater than the reported delay). The operators at Geoscope state that they will contact us when the curve of time corrections for this time period are done. END **************************************************************************** DATA PROBLEM REPORT ASL2003:188 2003/09/24 ASL DCC Valerie Peyton ASL ULN IU 10/*H* 2003,267,06:44:00 2003,268,08:21:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. All three channels of the S13 seismometer at ULN are dead. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2003:188 2003/09/25 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The ULN station operator fixed all three of the S13 seismometers at 2003, 268, 08:21. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2003:189 2003/09/24 ASL DCC Valerie Peyton ASL DAV IU 00/*HN 2003,213,18:58:00 2003,218,10:18:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4400 Channel data quality is very poor. The N component of the STS1 at DAV is experiencing great difficulty recording earthquakes properly during this time frame. The mass position is so far off- center that the mass has almost lost capture. Data should only be used with caution. END PROBLEM RESOLUTION REPORT ASL2003:189 2003/09/24 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The N component of the STS1 at DAV recovered at 2003, 218, 10:18. The mass position is still nearly pegged, but data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2003:186 2003/09/23 ASL DCC Valerie Peyton ASL DAV IU 00/*HN 2003,246,07:14:00 2003,266,04:38:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4625 Invalid instrument response. The N comopnent of the STS1 at DAV is in an abnormal resonance mode. Beginning at 6.7 Hz, the PSD values are 2 dB to 60 dB too high. The dominant resonance frequencies are 2 - 5 Hz. We are investigating the cause of the problem. Meanwhile, data should only be used with great caution. END PROBLEM RESOLUTION REPORT ASL2003:186 2003/11/14 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The response problem on the N component of the STS1 at DAV was solved at 2003, 266, 04:38. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2003:187 2003/09/24 ASL DCC Tyler Storm ASL WAKE IU 00/*HZ 2003,281,20:32:00 2005,154,05:45:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The Z component of the 54000 at WAKE has fallen against one of the stops. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2003:187 2005/06/03 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The instrument was replaced with another KS54000 END **************************************************************************** DATA PROBLEM REPORT IDA1994:015 1994/10/14 IDA DCC Peter Davis IDA ARU II E?? 1993,351,00:00:00 1993,351,00:00:00 Problem Description POLARITY REVERSED The polarity of all six GS-13 data channels has been reversed since installation. We will advise when this problem is corrected. END PROBLEM RESOLUTION REPORT IDA1994:015 1999/09/16 IDA Peter Davis Description of Problem Resolution Resolution The problem was resolved when the data logger was upgraded on 1999,214. END **************************************************************************** DATA PROBLEM REPORT IDA1994:012 1994/08/11 IDA DCC Peter Davis IDA PFO II BLN 1994,186,00:00:00 1994,230,00:00:00 Problem Description DEAD CHANNEL Channel BLN is dead. The channel was working on 1994160 (during the Bolivian earthquake) and is certainly dead on 1994186. We believe the problem dates to the fire which swept through the vicinity of Pinyon Flat Observatory on 1994184 and will advise when problem has been corrected. END PROBLEM RESOLUTION REPORT IDA1994:012 1994/09/15 IDA Peter Davis Description of Problem Resolution Resolution The buffer box was replaced and normal operation resumed on 1994230. END **************************************************************************** DATA PROBLEM REPORT IDA1994:018 1994/11/16 IDA DCC Peter Davis IDA NVS II B?Z,VHZ 92,300 1993,085,00:00:00 1993,085,00:00:00 Problem Description OTHER The mass position of the vertical STS-1 saturated during this period. END **************************************************************************** DATA PROBLEM REPORT IDA1994:019 1994/11/23 IDA DCC Peter Davis IDA WRAB II E?? 1994,277,13:59:00 1994,311,00:00:00 Problem Description OTHER The STS-2 at WRAB did not trigger between 1994277-1994310. Because the cessation of triggers coincided with the passage of the first Rayleigh wave following the Mw=8.2 Kuril earthquake, the problem was thought to be related to mass position. When the station operator recentered the masses on 1994311, they were indeed found to be well in excess of |1V|. Recentering successfully restored the streams. END **************************************************************************** DATA PROBLEM REPORT IDA1994:016 1994/11/02 IDA DCC Peter Davis IDA ERM II ??? 1994,071,00:00:00 1994,071,00:00:00 Problem Description DATA LOGGER PROBLEM The data logger failed on 1994071. It is slated to be replaced this month. END PROBLEM RESOLUTION REPORT IDA1994:016 1995/03/01 IDA Peter Davis Description of Problem Resolution Resolution The data logger was replaced and began functioning on 1995053. END **************************************************************************** DATA PROBLEM REPORT IDA1994:017 1994/11/07 IDA DCC Peter Davis IDA BRVK II ??Z 1994,259,00:00:00 1994,271,00:00:00 Problem Description LOW FREQUENCY NOISE The seismic data channels associated with the vertical STS-1 all experienced high levels of noise believed to be related to station maintenance being performed in the vault at that time. The channels returned to normal during 1994-271. END **************************************************************************** DATA PROBLEM REPORT IDA1994:010 1994/08/04 IDA DCC Peter Davis IDA NNA II ?HE 1994,187,00:00:00 1994,187,00:00:00 Problem Description DEAD CHANNELS Signal from all three seismic channels (BHE, LHE, and VHE) originating at the EW STS-1 was lost on 1994187. We are working with local technical support to diagnose the problem and will advise when the signal is restored. END PROBLEM RESOLUTION REPORT IDA1994:010 1994/10/13 IDA Peter Davis Description of Problem Resolution Resolution The electronics component was replaced on 1994269 and operation of the EW channels from the STS-1 returned to normal. END **************************************************************************** DATA PROBLEM REPORT IDA1994:011 1994/08/11 IDA DCC Peter Davis IDA AAK II EHZ,ELZ 1994,012,00:00:00 1994,199,00:00:00 Problem Description DEAD CHANNELS Signal from the vertical GS-13 failed on 1994012 and was restored on 1994199. END **************************************************************************** DATA PROBLEM REPORT IDA1994:003 1994/04/12 IDA DCC Peter Davis IDA TLY II ??N 1994,041,00:00:00 1994,041,00:00:00 Problem Description DEAD CHANNEL We suspect the NS horizontal STS-1 sensor has failed. The signal from all NS broadband channels is null since 1994041. Attempts to troubleshoot the problem remotely are ongoing. END PROBLEM RESOLUTION REPORT IDA1994:003 1994/06/27 IDA Peter Davis Description of Problem Resolution Resolution The station was repaired during a maintenance trip and the broadband (STS-1) NS channels restored on 1994144. END **************************************************************************** DATA PROBLEM REPORT IDA1994:004 1994/05/09 IDA DCC Peter Davis IDA PFO II B?Z V?Z 1994,010,00:00:00 1994,122,00:00:00 Problem Description LOW FREQUENCY NOISE Channels originating from the vertical STS-1 sensor were noisy during this period because vacuum was lost under the bell jar covering the sensor. END **************************************************************************** DATA PROBLEM REPORT IDA1994:001 1994/01/13 IDA DCC Peter Davis IDA RPN II ??Z 1993,302,00:00:00 1993,302,00:00:00 Problem Description DEAD CHANNEL We suspect the vertical STS-1 sensor has failed. The signal from all vertical channels has saturated since 1993302. Attempts to troubleshoot the problem remotely have been unsuccessful, and a repair visit to Easter Island is now being planned shortly. We regret the inconvenience and will advise when these channels have been restored to proper operation. END PROBLEM RESOLUTION REPORT IDA1994:001 1994/02/22 IDA Peter Davis Description of Problem Resolution Resolution The vertical STS-1 sensor was replaced and became operational on 1994043 (Feb 12). END **************************************************************************** DATA PROBLEM REPORT IDA1994:002 1994/01/13 IDA DCC Peter Davis IDA AAK II ??N,??E 1990,285,00:00:00 1990,285,00:00:00 Problem Description CHANNEL ORIENTATION Based upon analysis of Love wave polarization by two researchers, we have concluded that the horizontal STS-1 sensors have been misaligned since they were first installed on 1990285. The station will be upgraded shortly, and at that time, the misalignment will be corrected. Our best estimate of the true current alignment is N8E for the NS component and N98E for the EW. The uncertainty of these values is 2 degrees. We will advise when the sensors have been realigned. END PROBLEM RESOLUTION REPORT IDA1994:002 1994/02/22 IDA Peter Davis Description of Problem Resolution Resolution During a recent upgrade of the system at AAK, the orientation of the horizontal sensors was examined and the two were found to be non-orthogonal. By comparison with a second, nearby pier whose orientation was determined by gyroscope, it was decided that the orientation of the sensors had been N6E for the NS and N90E for the EW. To correct this, the NS sensor was rotated 6 degrees counter-clockwise and the EW orientation left unchanged. This new orientation took effect on 1994012 (Jan 12). The individual horizontal sensors had been replaced separately after equipment failures, so the problem probably extends back to when one or the other was first installed. The EW instrument was originally emplaced on 9/11/91, and the NS, on 4/16/91. We regret any inconvenience this has caused. END **************************************************************************** DATA PROBLEM REPORT IDA1994:007 1994/06/27 IDA DCC Peter Davis IDA NRIL II ??? 1993,119,00:00:00 1993,119,00:00:00 Problem Description OTHER NRIL reports a data gap 29 April 1994 through 6 May 1994 and intermittent operation in May and June. A reconfiguration (unauthorized) of trigger parameters for the GS-13 channels by the mine operators is causing excessive amounts of data, filling up the DAT tape every few days. The operators were asked to restore default operation and we hope to see this change on incoming tapes very soon. END PROBLEM RESOLUTION REPORT IDA1994:007 1994/07/12 IDA Peter Davis Description of Problem Resolution Resolution The default trigger parameters were restored to the data logger on 1994146 (26 May) and normal operation resumed on that date. END **************************************************************************** DATA PROBLEM REPORT IDA1994:008 1994/07/07 IDA DCC Peter Davis IDA FFC II ??? 1994,106,00:00:00 1994,166,00:00:00 Problem Description OTHER FFC was down 16 April 1994 - 15 June 1994, we believe due to a short circuit over the uplink cable which burned out components on several electronics boards within the data acquisition system. The boards have been replaced and the uplink, repaired. No Problem Resolution Report required. END **************************************************************************** DATA PROBLEM REPORT IDA1994:005 1994/06/01 IDA DCC Peter Davis IDA LVZ II B?Z V?Z 1994,104,03:44:00 1994,144,13:33:00 Problem Description DEAD CHANNEL Signals from the vertical STS-1 sensor failed on 94,104,03:44 at LVZ. The problem was diagnosed to be a power supply failure. Signal on all vertical channels was reacquired when the power supply was replaced on 1994144. END **************************************************************************** DATA PROBLEM REPORT IDA1994:006 1994/06/01 IDA DCC Peter Davis IDA NRI II E?Z 1992,350,05:55:00 1992,350,05:55:00 Problem Description POLARITY REVERSED The polarity of the vertical GS-13 sensor has been reversed since installation. We will advise when this problem is corrected. END PROBLEM RESOLUTION REPORT IDA1994:006 1994/11/16 IDA Peter Davis Description of Problem Resolution Resolution The polarity of the vertical GS-13 sensor was corrected on 1994320 (November 16). END **************************************************************************** DATA PROBLEM REPORT IDA1994:009 1994/07/20 IDA DCC Peter Davis IDA MSVF II ??N, ??E 1994,148,00:00:00 1994,148,00:00:00 Problem Description POLARITY REVERSED The polarity of the NS and EW channels have been reversed since installation. The most likely explanation is that the seismometer package locked into the hole coupling mechanism 180 degrees out of position. END PROBLEM RESOLUTION REPORT IDA1994:009 1994/07/28 DMC Rick Benson Description of Problem Resolution Resolution A dataless seed was used to correct the polarities for the horizontals. The header information has been replaced in the DMC database for all time periods 1994,144, the date of installation. END **************************************************************************** DATA PROBLEM REPORT UW1997:008 1997/09/15 University of Washington Ken Creager SPYDER PAB IU *** 1997,190,07:01:00 1997,192,10:49:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 770 Clock is Unlocked. P wave at PAB is about 1 minute late for event 970709_1924. See pub/qc/qc_ps/UW97:008.ps END PROBLEM RESOLUTION REPORT UW1997:008 2000/03/13 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The clock at PAB lost 60 seconds on 1997,190,07:01. The clock remained 60 seconds off until it was reset by the operator on 1997,192,10:49. END **************************************************************************** DATA PROBLEM REPORT UW1997:007 1997/09/12 UW Ken Creager DMC QIZ CD LHZ 1996,001,00:00:00 1996,001,00:00:00 Problem Description INVALID RESPONSE Amplitudes of long period P waves (20s) appear systematically 67% too big. /pub/qc/qc_ps/UW1997:007 END **************************************************************************** DATA PROBLEM REPORT UW1997:006 1997/09/12 UW Ken Creager DMC ERM ?? LHZ 1996,001,00:00:00 1996,001,00:00:00 Problem Description INCORRECT TIME Long-period P-wave (20 s) amplitudes appear 41% too large averaged over the year of 1996. (/pub/qc/qc_ps/UW1997:006) END **************************************************************************** DATA PROBLEM REPORT UW1997:005 1997/09/12 UW Ken Creager DMC BJT IU LHZ 1996,001,00:00:00 1996,001,00:00:00 Problem Description INVALID RESPONSE Long-period (20 s) P-wave amplitudes are consistently 46% too large, averaged throughout the 1996 year. (/pub/qc/qc_ps/UW1995:005.ps) END **************************************************************************** DATA PROBLEM REPORT UW1997:004 1997/09/12 University of Washington Ken Creager DMC LZH CD LHZ 1996,001,00:00:00 1996,001,00:00:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 520 Time may be in error by several seconds. Long-period (20s) P waves arrive consistently 3.4 s too late for the whole year. (/pub/qc/qc_ps/UW97:005.ps) END PROBLEM RESOLUTION REPORT UW1997:004 2000/03/14 ASL DCC Valerie Peyton Description of Problem Resolution COMMENT Unfortunately, the manner in which we check for timing problems at a station does not allow us sufficient resolution to determine a consistent 3.4 second problem. However, it is not at all unlikely that the clock at LZH is off. LZH is one of the original China Digital Seismic Network (CDSN) stations, and is still running on old equipment. The original CDSN clocks rely on WWV radio-broadcast time ticks to check their timing each second. One must manually set a delay time on the radio receiver to compensate for the travel time delay from radio source to receiver. One must also manually set the time on the clock to get things started. If there is any error in either of these settings, it is possible for the clock to appear to be running on time (ie be synchronized with the second ticks received by radio) but in fact be off by a number of seconds. As far as we know, no GPS receiver has been installed at LZH, and there are no plans for installing one. We are no longer maintaining this installation, but are simply helping get the data from LZH to the DMC. No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT UW1997:003 1997/09/12 University of Washington Ken Creager DMC DPC CZ *** 1996,047,06:22:00 1996,053,15:10:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 440 Clock Unlocked. The long period P wave clearly arrives 26 s late (qc/qc_ps/UW97:003.ps) for the earthquake at 2/16/96 15:22. P waves arrive at the correct time for events 96/02/07 21:36 and 96/03/16 22:04. END PROBLEM RESOLUTION REPORT UW1997:003 2000/03/15 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION On 1996, 047, 06:22 the clock at DPC appears to have lost 37.5 seconds. The clock appears to resume correct timing at 1996, 053, 15:10. The cause of this particular timing problem is unknown, but the clock at DPC has a history of malfunction. END **************************************************************************** DATA PROBLEM REPORT UW1997:002 1997/09/12 UW Ken Creager DMC YSS IU LHZ 1996,209,00:00:00 1996,209,00:00:00 Problem Description INCORRECT TIME At the same time there was a dramatic change in amplitudes of long-period (20s) P waves at YYS, there was a more subtle shift in travel time residuals for P waves. After day 209, P wave residuals are systematically about one second earlier than before. See UW1997:002 and /pub/qc/qc_ps/UW1997:002 and /pub/qc/qc_ps/UW1997:001. END PROBLEM RESOLUTION REPORT UW1997:002 2000/03/30 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Random long-period pulses were observed on the vertical component of the STS1 at YSS from 1996,182 to 1997,240. During this time period, the pulses often appeared to be precipitated by the onset of large events, including teleseisms. These pulses most likely interfered with calculating long period P wave travel time residuals. The cause and the cure have not been identified, but the problem appears to have ceased. For more information, please also see ASL1996:037. END **************************************************************************** DATA PROBLEM REPORT UW1997:010 1997/12/26 University of Washington Ken Creager SPYDER PAB IU LHZ 1997,190,00:00:00 1997,190,00:00:00 Problem Description INCORRECT TIME Spyder plot from coral for broadband data shows the P-wave arriving about 60 s late relative to other data for event on 7/9/97 at 19:24:11 END PROBLEM RESOLUTION REPORT UW1997:010 2000/04/04 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The clock at PAB lost 60 seconds on 1997,190,07:01. The clock remained 60 seconds off until it was reset by the operator on 1997,192,10:49. Please also see UW1997:008. END **************************************************************************** DATA PROBLEM REPORT UW1997:001 1997/09/12 UW Ken Creager DMC YSS IU LHZ 1996,209,00:00:00 1996,209,00:00:00 Problem Description INVALID RESPONSE Amplitudes of long period (20 s) P waves appear to be OK for the first half of the year, but are more than a factor of 2 too small after day 209 for the rest of the year. I have not checked 1997 data. END PROBLEM RESOLUTION REPORT UW1997:001 2000/03/30 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Random long-period pulses were observed on the vertical component of the STS1 at YSS from 1996,182 to 1997,240. During this time period, the pulses often appeared to be precipitated by the onset of large events, including teleseisms. These pulses most likely interfered with calculating long period P wave amplitudes. The cause and the cure have not been identified, but the problem appears to have ceased. For more information, please also see ASL1996:037. END **************************************************************************** DATA PROBLEM REPORT NEICQC2007:116AUARMA 2007/04/26 NEIC Dan McNamara DMC ARMA AU BH* 2007,060,00:00:00 2007,115,00:00:00 Problem Description INVALID RESPONSE gains appears to be high END **************************************************************************** DATA PROBLEM REPORT UW1993:039 1993/09/29 University of Washington Luciana Astiz DMC SPA IU VH? 1992,001,00:00:00 1992,366,00:00:00 Problem Description TIME TEARS SPA has at least three or more tears throughout the day evrey day, some days there is as many as twelve tears! END PROBLEM RESOLUTION REPORT UW1993:039 1993/10/02 ASL Tyler Storm Description of Problem Resolution Comment There are several reasons for time tears at SPA. Since the station was installed until the next visit (mid Nov 92) the timing signal was supplied by earth stations. This scenario did not work well at the Pole because the clock could not get a good timing signal from any earth stations. As a result, the timing was only accurate to about a second. The operators would manually reset the clock every day (every day that they were able to do so). The one and two second time tears were caused by these manual resets. The second kind of tears are caused by errors in telemetry. During the winter months, when we are unable to get tapes mailed from Antarctica, we have the data telemetered. Sometimes there are errors, such as a bit getting lost in transmission. When this occurs, we have to get rid of that data record. The tears that are more than two seconds are associated with the telemetry problem. We will eventually have the original data tapes for the telemetered time frames when the shipping channels from Antarctica are opened. The telemetered data will then be overwritten when the original station tapes are loaded into the database. The last category of time tear I have obseved is the very small ones (less than one second). These are apparently caused when there is a slight discrepancy between the time from the standard, and the time that is being applied to the data. We are presently unclear on how to eliminate this problem. END **************************************************************************** DATA PROBLEM REPORT UW1993:044 1993/11/15 IRIS DMC Rick Benson DMC KONO IU BHZ/LHZ 1993,319,00:00:00 1993,319,00:00:00 Problem Description INCORRECT TIME The timing problem that was reported in UW1993:042 has gone from 10 secs to 20 seconds early. This makes the data between Oct 11 and present unreliable, and hopefully the station logs can point out when these errors were introduced. See the file ~ftp/pub/qc/qc_ps/ UW1993:044_ps for the obvious problem. END PROBLEM RESOLUTION REPORT UW1993:044 1993/11/16 ASL Tyler Storm Description of Problem Resolution Comment Refer to Problem Resolution Report UW1993:042. END **************************************************************************** DATA PROBLEM REPORT UW1993:043 1993/10/19 University of Washington Ken Creager Gopher CCM IU BHZ 1993,284,00:00:00 1993,284,00:00:00 Problem Description INCORRECT TIME The P wave arrives 9 s late at CCM for the mb 6.6 deep-focus Japan earthquake of 10/11/93. See pub/qc/qc_ps/UW1993:043_ps END PROBLEM RESOLUTION REPORT UW1993:043 2000/09/27 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Looking at data for the deep-focus Japan event on 1993, 284, as well as data for events on the days immediately preceeding and following, there is no apparent timing problem at CCM. I agree that the predicted arrival time for the event on 1993,284 plots between 6 and 8.5 seconds earlier than the P wave arrives. However, predicted arrival times of surrounding events plot within a few seconds of the first arrivals of those events. Within the errors inherent in using predicted arrivals to check for proper timing, none of these events indicate a problem with timing at CCM. Since the seed headers of data from 1993 do not include any diagnostic information on clock quality and clock state of health, using predicted arrival times is the best we can do. END **************************************************************************** DATA PROBLEM REPORT UW1993:042 1993/10/19 University of Washington Ken Creager Gopher KONO IU BHZ 1993,284,00:00:00 1993,284,00:00:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 451 Timing MAY be in error, as clock is unlocked. The P wave arrives 10 s early at KONO for the mb 6.6 deep-focus Japan earthquake of 10/11/93. See pub/qc/qc_ps/UW1993:042_ps END PROBLEM RESOLUTION REPORT UW1993:042 1993/11/16 ASL Tyler Storm Description of Problem Resolution Comment The timing system at KONO is still drifting (16 Nov 93). On 11 Oct the drift was approximately 10 seconds, and 18 seconds on 9 Nov. Assuming this drift is linear (it probably is) the timing errors would have started around the first week of Sep 93. The system is not receiving the timing signal from the earth station that KONO uses for a timing standard. Without a timing standard, the system will drift on the internal oscillator. The station operators are in the process of tracing the problem. They believe there is most likely a flaw in the 500 feet of coax cable used to get the antenna above ground. PROBLEM RESOLUTION REPORT UW1993:042 1994/02/11 ASL Tyler Storm Description of Problem Resolution SUPPLEMENT KONO timing appears to have stabilized as of 1993, 347, 00:00. It may have stabilized as early as 1993, 338, 00:12. Since we cannot currently confirm the earlier time, we recommend cautious use of data until 1993, 347. END **************************************************************************** DATA PROBLEM REPORT UW1993:041 1993/10/18 University of Washington Luciana Astiz DMC GRFO SR ?H? 1992,012,00:00:00 1994,026,17:00:00 Problem Description TIME TEARS GRFO has so many time tears in some days that is very hard to use the data. For the data I have used the problem is specially bad for the following days: 012, 014, 025, 045, 046, 046, 047, 058, 069, 070, 081, 092, 093, 103, 131, 132, 144, 145, 169, 171, 172, 183, 185, 207, 208, 235, 240, 247, 249, 261, 262, 263, 265, 300, 312, 321, 334, 335, 335, 340, 344, 345, 356 The following is just an example for day 045 LHZ component of files that should have been a continous 2.5 hours data set: 1992.045.05.10.16.9600.GRFO.LHZ.SAC 1992.045.05.21.34.0200.GRFO.LHZ.SAC 1992.045.05.27.13.0000.GRFO.LHZ.SAC 1992.045.05.32.51.9800.GRFO.LHZ.SAC 1992.045.05.38.30.9700.GRFO.LHZ.SAC 1992.045.05.44.09.9500.GRFO.LHZ.SAC 1992.045.05.55.27.0200.GRFO.LHZ.SAC 1992.045.06.01.06.0000.GRFO.LHZ.SAC 1992.045.06.06.44.9900.GRFO.LHZ.SAC 1992.045.06.18.01.0300.GRFO.LHZ.SAC 1992.045.06.23.39.9800.GRFO.LHZ.SAC 1992.045.06.34.56.9900.GRFO.LHZ.SAC 1992.045.06.40.35.9800.GRFO.LHZ.SAC 1992.045.06.57.30.9600.GRFO.LHZ.SAC 1992.045.07.08.47.9800.GRFO.LHZ.SAC 1992.045.07.14.26.0300.GRFO.LHZ.SAC 1992.045.07.20.04.9400.GRFO.LHZ.SAC 1992.045.07.31.21.0200.GRFO.LHZ.SAC After day 081 the time tears seem to occur evrey 6.5 minutes !! END PROBLEM RESOLUTION REPORT UW1993:041 1993/11/10 ASL Tyler Storm Description of Problem Resolution COMMENT The old SRO equipment cannot deal with the modern technology used to telemeter the data from the remote site. We came to this conclusion after performing numerous tests and equipment swaps in order to pin down the gaps. GRFO data will continue to be riddled with gaps until the station is upgraded. SUPPLEMENT Station GRFO was upgraded to an IRIS system running a Quanterra digitizer on 1994, 026. Time tears are no longer a problem at this station. END **************************************************************************** DATA PROBLEM REPORT UW1993:040 1993/09/29 University of Washington Luciana Astiz DMC PAS TS VH? 1992,001,00:00:00 1992,366,00:00:00 Problem Description TIME TEARS PAS has at least four or more tears throughout the day evrey day in 1992. #Is there a clock tracking problem at this station? END PROBLEM RESOLUTION REPORT UW1993:040 1993/11/19 ASL Tyler Storm Description of Problem Resolution COMMENT There is some sort of clock, or clock tracking problem at PAS. I have not noticed any major time errors at PAS lately; it seems the system does get synchronized with with the clock before there is a substantial difference netween the internal oscillator and the timing standard. Although this situation is not optimal, the timing at PAS is reliable. Unless the timing system is modified, or upgraded, I assume we will continue to see the problem. END **************************************************************************** DATA PROBLEM REPORT ASL2006:000 2006/01/03 ASL DCC Valerie Peyton ASL LSZ IU 00/*H* 2006,003,11:16:00 2006,026,14:07:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. All three channels of the LSZ STS1 went to digitizer noise simultaneously. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2006:000 2006/01/27 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The LSZ station operator replaced the DMA-1, which fixed the STS1s. Data quality returns to normal at 2006, 026, 14:07. END **************************************************************************** DATA PROBLEM REPORT ASL2006:001 2006/01/03 ASL DCC Valerie Peyton ASL GUMO IU 10/*HN 10/*HE 2006,003,12:28:00 2006,003,15:32:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. Both horizontal components of the GUMO CMG3T have fallen against their stops. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2006:001 2006/01/03 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION We remotely recentered the GUMO CMG3T. Data quality returns to normal at 2006, 003, 15:32. END **************************************************************************** DATA PROBLEM REPORT ASL2006:002 2006/01/05 ASL DCC Tyler Storm ASL QSPA IU 20/*H* 2006,004,17:58:00 2006,017,05:05:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The QSPA STS2 masses have fallen against their stops. Very large events may still be visible; beyond that, data are not useable. END PROBLEM RESOLUTION REPORT ASL2006:002 2006/01/17 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Instrument was reset 2006,017,05:05:00. Data are back to normal. END **************************************************************************** DATA PROBLEM REPORT ASL2006:003 2006/01/05 ASL DCC Valerie Peyton ASL KIEV IU BHZ LHZ VHZ UHZ 1996,123,17:33:00 1996,152,10:32:00 Problem Description NOISE SEED COMMENT REFERENCE C 1850 Sensor has lost vacuum containment. The Z component of the STS1 at KIEV appears to have lost vacuum containment and is displaying excessively high level of long period noise. END PROBLEM RESOLUTION REPORT ASL2006:003 2006/01/05 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The Z component of the KIEV STS1 appears to have been evacuated, solving the long period noise problem. Data quality returns to normal at 1996, 152, 10:32. END **************************************************************************** DATA PROBLEM REPORT ASL2006:008 2006/01/23 ASL DCC Valerie Peyton ASL SFJD IU 00/*HZ 2006,022,19:25:00 2006,024,14:04:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The Z component of the SFJD STS1 has fallen against one of its stops. For the first day or so, very large events may be visible. Beyond that, data are not useable. END PROBLEM RESOLUTION REPORT ASL2006:008 2006/01/24 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The SFJD station operator recentered the STS1 Z component. Data qualty returns to normal at 2006, 024, 14:04. END **************************************************************************** DATA PROBLEM REPORT ASL2006:009 2006/01/23 ASL DCC Valerie Peyton ASL HKT IU 00/*HE 2006,020,18:22:00 2006,023,17:46:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The HKT STS1 E component is down. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2006:009 2006/01/24 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The HKT station operator recentered the STS1 E comopnent. Data quality returns to normal at 2006, 023, 17:46. END **************************************************************************** DATA PROBLEM REPORT ASL2006:004 2006/01/06 ASL DCC Valerie Peyton ASL BILL IU 00/*HZ 2006,006,11:50:00 2006,007,12:59:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The Z component of the STS1 at BILL has fallen against its stop. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2006:004 2006/01/09 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The BILL station operator recentered the STS1 Z component. Data quality returns to normal at 2006, 007, 12:59. END **************************************************************************** DATA PROBLEM REPORT ASL2006:005 2006/01/09 ASL DCC Tyler Storm ASL KBS IU 00/*HN 2006,006,20:08:00 2006,011,13:15:00 Problem Description 0 SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The N component of the STS1 at KBS has fallen against its stop. For the first few days, large events may be visible. After that, data are not useable. END PROBLEM RESOLUTION REPORT ASL2006:005 2006/01/12 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Instrument was centered 2006,011,13:15:00. END **************************************************************************** DATA PROBLEM REPORT ASL2006:006 2006/01/19 ASL DCC Valerie Peyton ASL QSPA IU */* 2006,017,02:02:00 2006,022,21:06:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. An ASL field engineer is currently on location at QSPA. Data quality and availability may be erratic. In addition, calibrations and other tests should be expected. END PROBLEM RESOLUTION REPORT ASL2006:006 2006/01/23 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The ASL field engineer left QSPA in excellent operational order at 2006, 022, 21:06. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2006:007 2006/01/20 ASL DCC Valerie Peyton ASL QSPA IU 40/HHZ 2006,018,06:35:00 2006,020,02:08:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The GS13 at QSPA is down and producing digitizer noise. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2006:007 2006/01/20 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The QSPA GS13 was fixed at 2006, 020, 02:08. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2006:011 2006/01/25 ASL DCC Valerie Peyton ASL CHTO IU 00/*H1 2005,335,00:00:00 2006,046,11:51:00 Problem Description NOISE SEED COMMENT REFERENCE C 4507 Channel has excessively high noise levels. The 1 component of the 54000 at CHTO has developed a massive noise problem. Noise levels are elevated by 10 - 60dB across the spectrum. This component has intermittant episodes of quiet, but beyond that the data are not useable. END PROBLEM RESOLUTION REPORT ASL2006:011 2006/02/15 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The 1 component of the CHTO 54000 failed completely at 2006, 046, 11:51. For more information on the new problem, please see ASL2006:043. END **************************************************************************** DATA PROBLEM REPORT ASL2006:012 2006/01/26 ASL DCC Valerie Peyton ASL SNZO IU */* 2006,025,21:18:00 2006,025,21:18:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. An ASL field engineer is currently on location at SNZO. Data quality and availability may be erratic. In addition, calibrations and other tests should be expected. END **************************************************************************** DATA PROBLEM REPORT ASL2006:013 2006/01/26 ASL DCC Valerie Peyton ASL QSPA IU 20/*H* 2006,020,02:50:00 2006,020,21:47:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The QSPA STS2 channels are down. END PROBLEM RESOLUTION REPORT ASL2006:013 2006/01/26 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The problem was a loose connector. The QSPA STS2 channels are fixed as of 2006, 020, 21:47. END **************************************************************************** DATA PROBLEM REPORT ASL2006:014 2006/01/27 ASL DCC Valerie Peyton ASL HNR IU 10/*HN 2006,027,02:33:00 2006,027,02:33:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4625 Invalid instrument response. The N component of the STS2 at HNR has lost 10 - 30 dB of its response. Data are not useable. END **************************************************************************** DATA PROBLEM REPORT ASL2006:010 2006/01/24 ASL DCC Valerie Peyton ASL TSUM IU 00/*HE 2006,024,02:15:00 2006,024,02:15:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The STS1 E component at TSUM has fallen against one of its stops. Data are not useable. END **************************************************************************** DATA PROBLEM REPORT ASL2006:019 2006/02/06 ASL DCC Valerie Peyton ASL PMG IU 00/*H* 2006,036,23:35:00 2006,041,03:37:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. All three components of the STS1 seismometer are digitizer noise. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2006:019 2006/02/13 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The PMG station operator replaced a blown fuse in the STS1 CCU, fixing the problem with the instruments. Data quality returns to normal at 2006, 041, 03:37. END **************************************************************************** DATA PROBLEM REPORT ASL2006:015 2006/01/30 ASL DCC Valerie Peyton ASL CPUP GT 00/*H* 2005,279,19:34:00 2005,279,19:34:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4625 Invalid instrument response. The 54000 at CPUP has a response problem. Above 0.5Hz the response is 2 to 27dB too high; below 0.5Hz the response is 5 to 20 dB too low. Data should only be used with great caution. END **************************************************************************** DATA PROBLEM REPORT DMCQC2013:0046 2013/02/22 IRIS DMC Gillian Sharer DMC Z50A TA ?H[NZ] 2012,230,07:25:00 2013,023,00:00:00 Problem Description INVALID RESPONSE TA.Z50A.?HN had a sudden decrease in amplitudes on 2012.350 07:25. This lasted until 2012.353 20:26 UTC when it corrected after a mass recenter. The amplitude issue reoccurred on 2012.358 08:00-10:33 and 2012.358 23:46-2012.360 00:45 UTC. There was a dc offset shift of ~2500 counts during periods of low amplitudes. The same issue began occurring on the ?HZ channel on 2012.358 21:37 UTC, shifting several times between low amplitude and normal states. The station ceased to send realtime data on 2012.364, at which time the ?HZ channel had low amplitudes. END PROBLEM RESOLUTION REPORT DMCQC2013:0046 2013/02/22 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The sensor was replaced on 2013.023 00:00 UTC and the station resumed normal recording of seismic data. END **************************************************************************** DATA PROBLEM REPORT ASL2006:016 2006/01/31 ASL DCC Valerie Peyton ASL TATO IU 00/* 2006,025,13:59:00 2006,026,03:04:00 Problem Description OTHER SEED COMMENT REFERENCE C 1840 Calibration data Calibrations were run on the TATO 54000 instrument during this time. END PROBLEM RESOLUTION REPORT ASL2006:016 2006/01/31 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The TATO 54000 calibrations ended at 2006, 026, 03:04. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT DMCQC2013:0047 2013/02/22 IRIS DMC Gillian Sharer DMC T47A TA ?HZ 2012,112,21:09:00 2012,125,23:23:00 Problem Description OTHER On 2012.112 21:09 UTC, TA.T47A.?HZ began recording very large amplitude noise instead of seismic data. END PROBLEM RESOLUTION REPORT DMCQC2013:0047 2013/02/22 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The sensor was replaced on 2012.123 ~20:30 UTC, and TA.T47A resumed recording normal seismic data after a mass recenter on 2012.125 23:23 UTC. END **************************************************************************** DATA PROBLEM REPORT ASL2006:017 2006/02/01 ASL DCC Valerie Peyton ASL RAR IU */* 2006,031,09:48:00 2006,037,21:15:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 452 Timing IS in error, as clock is unlocked. The serial ports on the RAR DA have failed, cutting off the GPS signal. Timing should be considered incorrect. END PROBLEM RESOLUTION REPORT ASL2006:017 2006/02/06 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The RAR station operator replaced the QPWR board, which solved the problem with the serial ports. Timing quality returns to normal at 2006, 037, 21:15. END **************************************************************************** DATA PROBLEM REPORT DMCQC2013:0048 2013/02/22 IRIS DMC Gillian Sharer DMC T47A TA * 2012,362,04:00:00 2013,045,23:30:00 Problem Description OTHER TA.T47A stopped recording accurate seismic data after VM1 and VM3 came up against the stops on 2012.362 ~04:00 UTC. Counts on [BL]H[EZ] soared into the millions. END PROBLEM RESOLUTION REPORT DMCQC2013:0048 2013/02/22 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION TA.T47A resumed recording normal seismic data after the sensor was replaced on 2013.045 23:30 UTC. END **************************************************************************** DATA PROBLEM REPORT ASL2006:018 2006/02/03 ASL DCC Valerie Peyton ASL CHTO IU 00/*HZ 2006,031,10:43:00 2006,123,11:38:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The Z component of the 54000 at CHTO is down. Data are not useable. END **************************************************************************** DATA PROBLEM REPORT DMCQC2013:0049 2013/03/08 IRIS DMC Peggy Johnson DMC L50A TA * 2012,344,00:00:00 2013,057,300:00:00 Problem Description OTHER The U-element of the sensor pinged since installation 2012.344. END PROBLEM RESOLUTION REPORT DMCQC2013:0049 2013/03/08 IRIS DMC Peggy Johnson Description of Problem Resolution RESOLUTION After settling, normal operation of L50A begins day 2013.057 after replacing the sensor late on day 2013.056. END **************************************************************************** DATA PROBLEM REPORT DMCQC2013:0043 1900/01/01 DMC N51A TA [BL]H? 2012,241,00:00:00 2012,260,23:59:00 Problem Description From the installation of TA.N51A on 2012.241, the masses would not level and the sensor was aseismic, until the sensor was mechanically levelled late on 2012.260, ~2230 UTC. END PROBLEM RESOLUTION REPORT DMCQC2013:0043 1900/01/01 Description of Problem Resolution The station TA.N51A returned to normal operation by 2012.260 2359 UTC, after the sensor was mechanically levelled and had some time to settle down. END **************************************************************************** DATA PROBLEM REPORT DMCQC2013:0044 2013/02/08 IRIS DMC Gillian Sharer DMC 833A TA * 2013,018,06:18:00 2013,028,19:00:00 Problem Description DEAD CHANNEL TA.833A.?H[NZ] began experiencing problems with noise on 2013.018 06:18 UTC. The sensor stopped responding to mass recenters, and by 2013.019 the channels were recording only noise and no seismic energy. END PROBLEM RESOLUTION REPORT DMCQC2013:0044 2013/02/08 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION TA.833A resumed normal operation after a sensor swap on 2013.028 ~19:00 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2013:0045 2013/02/08 IRIS DMC Gillian Sharer DMC 451A TA * 2012,220,14:30:00 2012,256,18:10:00 Problem Description DEAD CHANNEL TA.451A.?HZ began experiencing abnormal noise on day 2012.220 14:30 UTC. After a mass lock/unlock on 2012.226 21:28 UTC, the channel became nonseismic and recorded only noise. During this time period, there was also abnormal noise on E and N. END PROBLEM RESOLUTION REPORT DMCQC2013:0045 2013/02/08 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION TA.451A resumed normal operation after a sensor replacement on day 2012.256 18:10 UTC. END **************************************************************************** DATA PROBLEM REPORT IDA2007:002 2007/01/19 IDA DCC Erik Klimczak IDA KDAK II *** 2007,018,00:00:00 2007,018,00:00:00 Problem Description OTHER IDA station KDAK is down as of about day 018-12:40 due to a power supply problem. The station operator has been requested to look for a spare converter limiter module for the generator. END **************************************************************************** DATA PROBLEM REPORT IDA2007:001 2007/01/19 IDA DCC Erik Klimczak IDA SHEL II BBZ-00 2007,009,00:00:00 2006,016,00:00:00 Problem Description DEAD CHANNEL The vertical channels from the KS-54000 seismometer were intermittently non-seismic from day 009-20:42 to 012-20:33 and 014-14:10 to 016-18:31. The channels were restored after a warm reset of the DAS. END **************************************************************************** DATA PROBLEM REPORT ASL1997:070 1997/12/08 ASL DCC Tyler Storm ASL SPA IU ?H? 1997,320,22:00:00 1997,325,07:00:00 Problem Description OTHER SEED COMMENT REFERENCE C 4010 Channel is down. Broad-band data are unusable during this time frame END PROBLEM RESOLUTION REPORT ASL1997:070 2001/09/03 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Broad-band data from SPA return to normal quality early in the day on 1997,325. END **************************************************************************** DATA PROBLEM REPORT ASL1997:065 1997/11/20 ASL DCC Tyler Storm ASL CMB BK LHZ, LHN, LHE 1992,177,00:00:00 1999,346,02:30:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE C 4210 Time uncertain. There appears to be a timing discrepancy of up to one second in the LH (1 sample per second) data. The error seems to be related to the timing correction applied in the data logger to compensate for the FIR filter delays. However, further tests will need to be conducted to find exactly where the error is induced, and its severity. I will update the DPR as we learn more about the problem. END PROBLEM RESOLUTION REPORT ASL1997:065 2000/10/03 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION This type of timing error is a function of the digitizing software used. The seed structure accomodates the errors, but does not correct for these errors; corrections are generally quite small and are left up to the discretion of the data users. For more information on the problem, please see announcement on GSN timing errors (http://aslwww.cr.usgs.gov/Seismic_Data/timing.html). The digitizing software at CMB was upgraded on 1999,346; the upgraded version does not accumulate the timing errors that the previous version did. END **************************************************************************** DATA PROBLEM REPORT ASL1997:064 1997/11/20 ASL DCC Tyler Storm ASL PAS TS LHZ, LHN, LHE 1996,106,00:00:00 1998,280,16:20:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE C 4210 Time uncertain. There appears to be a timing discrepancy of up to one second in the LH (1 sample per second) data. The error seems to be related to the timing correction applied in the data logger to compensate for the FIR filter delays. However, further tests will need to be conducted to find exactly where the error is induced, and its severity. I will update the DPR as we learn more about the problem. END PROBLEM RESOLUTION REPORT ASL1997:064 2002/06/05 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION This type of timing error is a function of the digitizing software used. The seed structure accomodates the errors, but does not correct for these errors; corrections are generally quite small and are left up to the discretion of the data users. For more information on the problem, please see announcement on GSN timing errors (http://aslwww.cr.usgs.gov/Seismic_Data/timing.html). The digitizing software at PAS was upgraded on 1998,280; the upgraded version does not accumulate the timing errors that the previous version did. END **************************************************************************** DATA PROBLEM REPORT ASL1997:067 1997/11/21 ASL DCC Tyler Storm ASL INCN IU BHZ, LHZ, VHZ, UHZ 1997,243,03:00:00 1997,255,00:14:00 Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE C 1850 Sensor has lost vacuum containment. The bell jar containing the vertical instrument lost vacuum. Data in this time frame are usable, but very noisy. END PROBLEM RESOLUTION REPORT ASL1997:067 2005/07/18 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Vacuum was re-established in the INCN STS1. Data quality returned to normal at 1997, 255, 00:14. END **************************************************************************** DATA PROBLEM REPORT ASL1997:066 1997/11/21 ASL DCC Tyler Storm ASL CTAO IU ? 1997,287,05:00:00 1997,289,00:00:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 450 Time Uncertain. Timing is uncertain during this period. END PROBLEM RESOLUTION REPORT ASL1997:066 2001/04/04 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION CTAO timing quality returns to normal at 1997, 289, 00:00. END **************************************************************************** DATA PROBLEM REPORT ASL1997:061 1997/11/20 ASL DCC Tyler Storm ASL GRFO IU LHZ, LHN, LHE 1994,026,00:00:00 1999,036,00:00:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE C 4210 Time uncertain. There appears to be a timing discrepancy of up to one second in the LH (1 sample per second) data. The error seems to be related to the timing correction applied in the data logger to compensate for the FIR filter delays. However, further tests will need to be conducted to find exactly where the error is induced, and its severity. I will update the DPR as we learn more about the problem. END PROBLEM RESOLUTION REPORT ASL1997:061 2002/06/05 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION This type of timing error is a function of the digitizing software used. The seed structure accomodates the errors, but does not correct for these errors; corrections are generally quite small and are left up to the discretion of the data users. For more information on the problem, please see announcement on GSN timing errors (http://aslwww.cr.usgs.gov/Seismic_Data/timing.html). The digitizing software at GRFO was upgraded on 1999,036; the upgraded version does not accumulate the timing errors that the previous version did. END **************************************************************************** DATA PROBLEM REPORT ASL1997:060 1997/11/19 ASL DCC Tyler Storm ASL LSA IC BHZ, LHZ, VHZ, UHZ 1997,270,14:34:00 1998,009,10:27:00 Problem Description Problem Description NOISE SEED COMMENT REFERENCE C 1850 Sensor has lost vacuum containment. Long-period noise is very high due to a vacuum loss in the bell jar containing the vertical seis. END PROBLEM RESOLUTION REPORT ASL1997:060 2004/03/01 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Vacuum was reestablished in the LSA STS1 Z at 1998, 009, 10:27. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL1997:063 1997/11/20 ASL DCC Tyler Storm ASL WCI IU LHZ,LHN, LHE 1997,198,00:00:00 1997,198,00:00:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE C 3008 time uncertain. There appears to be a timing discrepancy of up to one second in the LH (1 sample per second) data. The error seems to be related to the timing correction applied in the data logger to compensate for the FIR filter delays. However, further tests will need to be conducted to find exactly where the error is induced, and its severity. I will up the DPR as we learn more about the problem. END **************************************************************************** DATA PROBLEM REPORT ASL1997:062 1997/11/20 ASL DCC Tyler Storm ASL WVT IU LHZ, LHN, LHE 1997,106,00:00:00 1997,106,00:00:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE C 3008 time uncertain. There appears to be a timing discrepancy of up to one second in the LH (1 sample per second) data. The error seems to be related to the timing correction applied in the data logger to compensate for the FIR filter delays. However, further tests will need to be conducted to find exactly where the error is induced, and its severity. I will up the DPR as we learn more about the problem. END **************************************************************************** DATA PROBLEM REPORT ASL1997:069 1997/11/28 ASL DCC Tyler Storm ASL DAV IU HLN, LLN 1997,298,10:46:00 1998,015,01:30:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. N/S channels from the FBA-23 low-gain sensor are dead. END PROBLEM RESOLUTION REPORT ASL1997:069 2001/04/06 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The FBA-23 at DAV was replaced on 1998,015. The new FBA-23 has a working N/S component, and the data now look good. END **************************************************************************** DATA PROBLEM REPORT ASL1997:068 1997/11/24 ASL DCC Tyler Storm ASL SPA IU BHN, LHN, VHN, UHN 1997,290,06:30:00 1997,291,03:40:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. N/S data are unusable during this time frame. END PROBLEM RESOLUTION REPORT ASL1997:068 2001/09/03 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The N component of the STS1 at SPA was recentered early in the day on 1997,291. END **************************************************************************** DATA PROBLEM REPORT ASL2006:044 2006/02/15 ASL DCC Valerie Peyton ASL SDV IU 00/* 2006,045,13:58:00 2006,046,02:34:00 Problem Description OTHER SEED COMMENT REFERENCE C 1840 Calibration data Calibrations were run on the SDV STS1 seismometers during this time. END PROBLEM RESOLUTION REPORT ASL2006:044 2006/02/15 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The SDV STS1 calibrations ended at 2006, 046, 02:34. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL1997:054 1997/09/23 ASL DCC Tyler Storm ASL MDJ IC SHN, SHE, HHN, HHE 1997,239,09:00:00 1997,239,09:00:00 Problem Description CHANNEL ORIENTATION The STS-2 instrument is misoriented by 90 degrees. This results in the following azimuth values: SHN, HHN - 90 SHE, HHE - 180 END **************************************************************************** DATA PROBLEM REPORT DMCQC2014:0125 2014/06/30 IRIS DMC Gillian Sharer DMC T42B N4 ?HZ 2014,118,00:36:00 2014,141,20:52:00 Problem Description INVALID RESPONSE On April 28 2014 00:36 UTC, the DC offset for N4.T42B.?HZ suddenly dropped by 3000 counts, accompanied by an amplitude reduction of ~50%. This may have been the result of a loss in differential output. Amplitudes (and dc offset) briefly recovered from between 2014.119 08:37-20:36 UTC before dropping again. END PROBLEM RESOLUTION REPORT DMCQC2014:0125 2014/06/30 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION After the sensor was replaced on May 21 2014 20:52 UTC, N4.T42B resumed recording data with normal amplitudes. END **************************************************************************** DATA PROBLEM REPORT ASL2006:045 2006/02/15 ASL DCC Valerie Peyton ASL SDV IU 10/* 2006,046,02:35:00 2006,046,11:50:00 Problem Description OTHER SEED COMMENT REFERENCE C 4010 Channel is down. Calibrations were run on the SDV CMG3T seismometer during this time. END PROBLEM RESOLUTION REPORT ASL2006:045 2006/02/15 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The SDV CMG3T calibrations ended at 2006, 046, 11:50. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL1997:053 1997/08/27 ASL DCC Tyler Storm ASL BGCA GT ? 1997,236,23:37:00 1998,053,16:22:00 Problem Description OTHER SEED COMMENT REFERENCE S 10 Station is down. The station went down at 23:37 UTC, 24 Aug 97. A lightning strike appears to have caused the damage. The station operators managed to get the system running again at 20:00 UTC, on 26 Aug, but the data is only digitizer noise and the station should be considered inoperative. The local station operators are currently swapping all of the toasty parts with new equipment. END PROBLEM RESOLUTION REPORT ASL1997:053 2000/06/16 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION From 1997,236,23:37 to 1998,053,16:22, only SHZ data are available. All channels are available beginning 1998,053,16:22. END **************************************************************************** DATA PROBLEM REPORT DMCQC2014:0124 2014/06/30 IRIS DMC Gillian Sharer DMC Q56A TA * 2014,063,00:14:00 2014,144,19:40:00 Problem Description OTHER Starting on March 4 2014, TA.Q56A experienced spikes and other ratty noise that severely affected the data quality on all 3 channels. END PROBLEM RESOLUTION REPORT DMCQC2014:0124 2014/06/30 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The noise resolved after a sensor swap on May 24 2014 19:40 UTC. The service report noted water in the vault and visible corrosion. END **************************************************************************** DATA PROBLEM REPORT ASL2006:046 2006/02/16 ASL DCC Valerie Peyton ASL MAJO IU 00/* 2006,046,13:56:00 2006,047,02:39:00 Problem Description OTHER SEED COMMENT REFERENCE C 1840 Calibration data Calibrations were run on the MAJO STS1 instruments at this time. END PROBLEM RESOLUTION REPORT ASL2006:046 2006/02/16 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The MAJO STS1 calibrations ended at 2006, 047, 02:39. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL1997:056 1997/10/06 ASL DCC Tyler Storm ASL CTAO IU ? 1997,274,00:00:00 1997,287,00:00:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 440 Clock Unlocked. Clock is "unlocked"; timing is uncertain. END PROBLEM RESOLUTION REPORT ASL1997:056 2001/04/04 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION CTAO timing quality returns to normal at 1997, 287, 00:00. END **************************************************************************** DATA PROBLEM REPORT DMCQC2014:0127 2014/06/30 IRIS DMC Gillian Sharer DMC H46A TA ?HZ 2013,169,13:15:00 2013,170,07:45:00 Problem Description OTHER The spiky one-sided noise on TA.H46A.?HZ that was observed in May 2013 (see DMCQC2014:126) was present again from June 18 13:15 UTC to June 19 07:45 UTC. END **************************************************************************** DATA PROBLEM REPORT ASL2006:047 2006/02/21 ASL DCC Valerie Peyton ASL BBSR IU 00/* 01/* 2006,047,13:59:00 2006,047,23:23:00 Problem Description OTHER SEED COMMENT REFERENCE C 1840 Calibration data Calibrations were run on the BBSR CMG3TB seismometer during this time. END PROBLEM RESOLUTION REPORT ASL2006:047 2006/02/21 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The BBSR CMG3TB calibrations ended at 2006, 047, 23:23. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL1997:055 1997/10/02 ASL DCC Tyler Storm ASL CHTO IU ? 1997,204,01:52:00 1997,259,00:30:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 540 Time may be 1 minute slow. Timing is one minute off. END PROBLEM RESOLUTION REPORT ASL1997:055 1997/10/16 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION Timing is good from 1997,259,00:30:00. END **************************************************************************** DATA PROBLEM REPORT DMCQC2014:0126 2014/06/30 IRIS DMC Gillian Sharer DMC H46A TA ?HZ 2013,134,22:20:00 2013,135,01:07:00 Problem Description OTHER From May 14 22:20 UTC to May 15 01:07 UTC, TA.H46A.?HZ experienced spiky one-sided noise, not related to ground motion. The noise spontaneously resolved. END **************************************************************************** DATA PROBLEM REPORT ASL2006:040 2006/02/14 ASL DCC Valerie Peyton ASL MBWA IU 00/* 2006,044,13:57:00 2006,045,02:52:00 Problem Description OTHER SEED COMMENT REFERENCE C 1840 Calibration data Calibrations were run on the MBWA 54000 seismometer during this time. END PROBLEM RESOLUTION REPORT ASL2006:040 2006/02/14 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The MBWA 54000 calibrations ended at 2006, 045, 02:52. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL1997:050 1997/08/07 ASL DCC Tyler Storm ASL INCN IU BHZ, LHZ, VHZ, UHZ 1997,218,18:38:00 1997,235,23:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The vertical data steams from the STS-1 instrument are inoperative due to the mass being "pegged". Large events may be visible, but data should be used with caution. END **************************************************************************** DATA PROBLEM REPORT HRV1999:018 1999/09/09 Harvard WQC N.Maternovskaya ASL XAN IU LHZ BHZ 1999,000,37:21:47 1999,000,37:21:47 Problem Description DIGITIZER ERROR Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1999:018 2000/03/02 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Both of the sensors at XAN were inoperational at this time. For the full time spans of the problems, please also see ASL1999:002 and ASL2000:052. END **************************************************************************** DATA PROBLEM REPORT DMCQC2014:0129 2014/07/03 IRIS DMC Gillian Sharer DMC Y58A TA [BL]H[ENZ] 2014,172,01:08:00 2014,310,20:50:00 Problem Description OTHER On June 21 2014 01:08 UTC, TA.Y58A stopped recording seismic energy in favor of a sinusoid signal with a period of 2.4 seconds that lasted for ~40 minutes. At 01:51 UTC, VM3 hit the stops and the seismic channel dc offsets soared to the millions of counts. Y58A is not responding to remote mass recenter requests and it is not recording accurate seismic data. END PROBLEM RESOLUTION REPORT DMCQC2014:0129 2015/01/09 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION TA.Y58A resumed recording normal seismic data after the sensor and digitizer were replaced on November 6, 2014. END **************************************************************************** DATA PROBLEM REPORT ASL2006:041 2006/02/14 ASL DCC Valerie Peyton ASL MBWA IU 10/* 2006,045,02:53:00 2006,045,12:18:00 Problem Description OTHER SEED COMMENT REFERENCE C 1840 Calibration data Calibrations were run on the MBWA CMG3T-B seismometer during this time. END PROBLEM RESOLUTION REPORT ASL2006:041 2006/02/14 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The MBWA CMG3T-B calibrations ended at 2006, 045, 12:18. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT HRV1999:017 1999/09/09 Harvard WQC N.Maternovskaya ASL TSUM IU BHZ LHZ 1999,000,28:08:10 1999,000,28:08:10 Problem Description LONG PERIOD TRANSIENT Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1999:017 2000/03/02 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION What we are actually looking at in the file /pub/qc/qc_ps/HRV1999:017 is the tail end of a random pulse or spike. The pulse itself is about 250sec wide (it begins as a spike, rising sharply over 14sec, and then gently falls off). I can't tell what caused it, but if one windows the data beginning about 100sec later than in the qc file, the data are fine. A magnitude 6.6 event is clearly visible about 850 seconds after the pulse ends. END **************************************************************************** DATA PROBLEM REPORT DMCQC2014:0128 2014/07/03 IRIS DMC Gillian Sharer DMC W61A TA * 2014,161,20:50:00 2014,174,21:05:00 Problem Description LOW FREQUENCY NOISE Starting on June 10 2014 20:50 UTC, TA.W61A.?HZ exhibited sensor noise at periods > ~3 seconds. The noise stopped on June 17 2014 21:56 UTC only to start again on June 21 13:40 UTC. END PROBLEM RESOLUTION REPORT DMCQC2014:0128 2014/07/03 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The sensor masses were locked from June 23 2014 20:59-21:05 UTC, and the noise stopped after the masses were unlocked. Unfortunately, the P arrival for the 06/23/14 20:53 UTC Mw 7.9 Aleutian Island event occurred while the sensor masses were locked and was not recorded. END **************************************************************************** DATA PROBLEM REPORT ASL2006:042 2006/02/14 ASL DCC Valerie Peyton ASL TATO IU 10/* 2006,026,13:50:00 2006,027,23:07:00 Problem Description OTHER SEED COMMENT REFERENCE C 1840 Calibration data Calibrations were run on the TATO STS2 instrument at this time. END PROBLEM RESOLUTION REPORT ASL2006:042 2006/02/14 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The TATO STS2 calibrations ended at 2006, Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL1997:052 1997/08/21 ASL DCC Tyler Storm ASL WMQ IC BHZ, LHZ, VHZ, UHZ 1997,118,00:00:00 1997,123,00:00:00 Problem Description OTHER There is no vertical data, from the STS-1 instrument, during this time frame. END PROBLEM RESOLUTION REPORT ASL1997:052 1997/08/21 ASL DCC Tyler Storm Description of Problem Resolution COMMENT The vertical channels come back on day 123 of 1997. END **************************************************************************** DATA PROBLEM REPORT ASL2006:043 2006/02/15 ASL DCC Valerie Peyton ASL CHTO IU 00/*H2 00/*H1 2006,046,11:51:00 2006,123,11:38:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The 2 component of the CHTO 54000 has failed, and the 1 component has failed completely. Data are not useable. END **************************************************************************** DATA PROBLEM REPORT ASL1997:051 1997/08/11 ASL DCC Tyler Storm ASL HKT IU BHE, LHE, VHE, UHE 1997,205,21:35:00 1997,220,17:50:00 Problem Description OTHER SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. Data from the e/w STS-1 are very degraded, or unusable, during this time frame. END PROBLEM RESOLUTION REPORT ASL1997:051 1997/08/11 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION Seismometer mass was re-centered on 1997,220, at 17:50 UTC. END **************************************************************************** DATA PROBLEM REPORT HRV1999:019 1999/09/09 Harvard WQC N.Maternovskaya ASL CCM IU LH BH 1999,000,91:21:36 1999,000,91:21:36 Problem Description DIGITIZER ERROR Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1999:019 2000/02/28 ASL DCC Valerie Peyton Description of Problem Resolution COMMENT The STS1 instrument was down at CCM at this time. For full time span of inoperation, please see ASL1999:026. END **************************************************************************** DATA PROBLEM REPORT ASL2006:048 2006/02/22 ASL DCC Valerie Peyton ASL KBS IU */* 2006,048,12:42:00 2006,081,10:40:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 440 Clock Unlocked. The KBS GPS receiver is not locked onto the GPS timing standard. Timing quality should be considered incorrect. END **************************************************************************** DATA PROBLEM REPORT ASL1997:058 1997/10/24 ASL DCC Tyler Storm ASL GLA TS ? 1997,276,00:00:00 1997,280,01:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE S 10 Station is down. All channels are dead. END PROBLEM RESOLUTION REPORT ASL1997:058 2001/12/07 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION ASL is no longer performing quality control on GLA data. The station was still down as of the last data we recieved. We cannot determine the end time of the problem, but since there is no more we can do, we are closing the problem report. END **************************************************************************** DATA PROBLEM REPORT ASL2006:049 2006/02/22 ASL DCC Valerie Peyton ASL AFI IU 00/* 2006,052,13:57:00 2006,053,02:39:00 Problem Description OTHER SEED COMMENT REFERENCE C 1840 Calibration data Calibrations were run on the AFI STS1 seismometers during this time. END PROBLEM RESOLUTION REPORT ASL2006:049 2006/02/22 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The AFI STS1 calibrations ended at 2006, 053, 02:39. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL1997:057 1997/10/06 ASL DCC Tyler Storm ASL RAR IU ? 1997,273,03:00:00 1997,302,21:19:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 440 Clock Unlocked. Clock is "unlocked"; timing is uncertain. END PROBLEM RESOLUTION REPORT ASL1997:057 2003/05/29 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The Omega clock timing service was unexpectedly shut down by the provider at 1997, 273, 03:00. Since timing at RAR was provided by an Omega clock, this left the station clock unlocked. The old Omega clock at RAR was replaced with a GPS clock at 1997, 302, 21:19. Timing quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL1997:059 1997/11/09 ASL DCC Tyler Storm ASL LSZ IU BHZ, LHZ, VHZ, UHZ 1997,249,08:20:00 1998,093,06:50:00 Problem Description OTHER SEED COMMENT REFERENCE C 4010 Channel is down. Data from the vertical STS-1 are unusable. END PROBLEM RESOLUTION REPORT ASL1997:059 2006/07/17 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION When LSZ came back online after a long data outage, the problem with the STS1 vertical instrument had been resolved. Data quality returns to normal at 1998, 093, 06:50. END **************************************************************************** DATA PROBLEM REPORT OSU-MT2010:014 2010/10/14 OSU-MT Anna Kelbert ES CAP03 EM * 2010,191,00:00:00 2010,237,00:00:00 Problem Description CHANNEL ORIENTATION NIMS magnetometer was misoriented so that Hx (not Hy) was close to 0 nT. Thus, Hx was pointing East and Hy was pointing South. At OSU, magnetic fields were rotated so that Hx points North. The archived time series have correct channel orientation. END PROBLEM RESOLUTION REPORT OSU-MT2010:014 2010/10/14 OSU-MT Anna Kelbert Description of Problem Resolution RESOLUTION At OSU, magnetic fields were rotated so that Hx points North. The archived time series have correct channel orientation. END **************************************************************************** DATA PROBLEM REPORT OSU-MT2010:013 2010/10/14 OSU-MT Anna Kelbert ES CAM03 EM * 2010,190,00:00:00 2010,231,00:00:00 Problem Description CHANNEL ORIENTATION NIMS magnetometer was misoriented so that Hx (not Hy) was close to 0 nT. Thus, Hx was pointing West and Hy was pointing North. At OSU, magnetic fields were rotated so that Hx points North. The archived time series have correct channel orientation. END PROBLEM RESOLUTION REPORT OSU-MT2010:013 2010/10/14 OSU-MT Anna Kelbert Description of Problem Resolution RESOLUTION At OSU, magnetic fields were rotated so that Hx points North. The archived time series have correct channel orientation. END **************************************************************************** DATA PROBLEM REPORT OSU-MT2010:016 2010/10/14 OSU-MT Anna Kelbert ES CAM94 EM * 2010,196,00:00:00 2010,251,00:00:00 Problem Description CHANNEL ORIENTATION NIMS magnetometer was misoriented so that Hx (not Hy) was close to 0 nT. Thus, Hx was pointing East and Hy was pointing South. At OSU, magnetic fields were rotated so that Hx points North. The archived time series have correct channel orientation. Data originally collected as CAM04; then site was relocated 12.8 km West. END PROBLEM RESOLUTION REPORT OSU-MT2010:016 2010/10/14 OSU-MT Anna Kelbert Description of Problem Resolution RESOLUTION At OSU, magnetic fields were rotated so that Hx points North. The archived time series have correct channel orientation. END **************************************************************************** DATA PROBLEM REPORT OSU-MT2010:015 2010/10/14 OSU-MT Anna Kelbert ES CAQ04 EM * 2010,193,00:00:00 2010,230,00:00:00 Problem Description CHANNEL ORIENTATION NIMS magnetometer was misoriented so that Hx (not Hy) was close to 0 nT. Thus, Hx was pointing West and Hy was pointing North. At OSU, magnetic fields were rotated so that Hx points North. The archived time series have correct channel orientation. END PROBLEM RESOLUTION REPORT OSU-MT2010:015 2010/10/14 OSU-MT Anna Kelbert Description of Problem Resolution RESOLUTION At OSU, magnetic fields were rotated so that Hx points North. The archived time series have correct channel orientation. END **************************************************************************** DATA PROBLEM REPORT OSU-MT2010:018 2010/10/14 OSU-MT Anna Kelbert ES CAQ05 EM * 2010,200,00:00:00 2010,244,00:00:00 Problem Description CHANNEL ORIENTATION NIMS magnetometer was misoriented so that Hx (not Hy) was close to 0 nT. Thus, Hx was pointing West and Hy was pointing North. At OSU, magnetic fields were rotated so that Hx points North. The archived time series have correct channel orientation. Days 244 to 267 were collected with magnetometer facing North. END **************************************************************************** DATA PROBLEM REPORT OSU-MT2010:017 2010/10/14 OSU-MT Anna Kelbert ES CAP05 EM * 2010,198,00:00:00 2010,245,00:00:00 Problem Description CHANNEL ORIENTATION NIMS magnetometer was misoriented so that Hx (not Hy) was close to 0 nT. Thus, Hx was pointing West and Hy was pointing North. At OSU, magnetic fields were rotated so that Hx points North. The archived time series have correct channel orientation. Days 245 to 258 were collected with magnetometer facing North. END PROBLEM RESOLUTION REPORT OSU-MT2010:017 2010/10/14 OSU-MT Anna Kelbert Description of Problem Resolution RESOLUTION At OSU, magnetic fields were rotated so that Hx points North. The archived time series have correct channel orientation. END **************************************************************************** DATA PROBLEM REPORT HRV1999:014 1999/09/09 Harvard WQC N.Maternovskaya ASL KONO IU LHN BHN 1999,000,28:08:10 1999,000,28:08:10 Problem Description DIGITIZER PROBLEM Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1999:014 2000/03/02 ASL DCC Valerie Peyton Description of Problem Resolution COMMENT The N-S instrument at KONO was inoperational at this time. For the full time span of inoperation, please see ASL1998:033. END **************************************************************************** DATA PROBLEM REPORT HRV1999:013 1999/03/19 Harvard WQC N.Maternovskaya ASL SBA GT LHZ LHN LHE 1998,350,00:18:00 1998,350,00:18:00 Problem Description LH INCORRECT SAMPLING RATE Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1999:013 2000/03/02 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The sampling rate problem described is not obvious from the data shown in the file /pub/qc/qc_ps/HRV99:013. I looked at our current data holdings, and the full LH? (1sps) data streams are available. END **************************************************************************** DATA PROBLEM REPORT HRV1999:016 1999/09/09 Harvard WQC N.Maternovskaya ASL SFJ IU BHZ LHZ 1999,000,37:21:47 1999,000,37:21:47 Problem Description DATA GLITCHES Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1999:016 2000/03/02 ASL DCC Valerie Peyton Description of Problem Resolution COMMENT The vertical channel at SFJ was down at this time. For the full time span of the problem, please also see ASL1999:011. END **************************************************************************** DATA PROBLEM REPORT HRV1999:015 1999/09/09 Harvard WQC N.Maternovskaya ASL NWAO IU LH?, BH? 1999,063,05:38:00 1999,063,05:38:00 Problem Description DIGITIZER PROBLEM Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1999:015 2000/03/02 ASL DCC Valerie Peyton Description of Problem Resolution COMMENT The seismometers at NWAO were off-line at this time for routine testing. Please also see ASL1999:015. END **************************************************************************** DATA PROBLEM REPORT OSU-MT2010:010 2010/10/14 OSU-MT Anna Kelbert ES CAN05 EM * 2010,188,00:00:00 2010,215,00:00:00 Problem Description CHANNEL ORIENTATION NIMS magnetometer was misoriented so that Hx (not Hy) was close to 0 nT. Thus, Hx was pointing West and Hy was pointing North. At OSU, magnetic fields were rotated so that Hx points North. The archived time series have correct channel orientation. END PROBLEM RESOLUTION REPORT OSU-MT2010:010 2010/10/14 OSU-MT Anna Kelbert Description of Problem Resolution RESOLUTION At OSU, magnetic fields were rotated so that Hx points North. The archived time series have correct channel orientation. END **************************************************************************** DATA PROBLEM REPORT HRV1999:010 1999/02/24 Harvard WQC N.Maternovskaya ASL YAK IU BHZ BHN BHE 1998,323,15:39:00 1998,323,15:39:00 Problem Description DEAD CHANNELS Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1999:010 2000/03/03 ASL DCC Valerie Peyton Description of Problem Resolution COMMENT I checked the data we have available for day 1998,323 for YAK, and it appears that the comm link was having problems for much of the day, beginning around 04:00 GMT. After this time, much of the data is missing. The comm link resumes normal functioning on 1998,324. Where the file /pub/qc/qc_ps/HRV99:010 shows flat-lined data, our data holdings indicate a data gap. END **************************************************************************** DATA PROBLEM REPORT DMCQC2014:0121 2014/06/26 IRIS DMC Gillian Sharer DMC E57A TA * 2014,115,05:38:00 2014,166,01:20:00 Problem Description DEAD CHANNEL On April 25 2014 05:38 UTC, TA.E57A stopped recording accurate seismic data. The station returned only spiky noise on ?HN and ?H[EZ] were also adversely affected. END PROBLEM RESOLUTION REPORT DMCQC2014:0121 2014/06/26 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The station resumed recording seismic data on June 15 01:20 UTC after the sensor was replaced. The service visit found water in the vault and the noise was likely due to corrosion. END **************************************************************************** DATA PROBLEM REPORT DMCQC2014:0120 2014/06/26 IRIS DMC Gillian Sharer DMC E62A TA ?HN,VM2 2014,101,18:00:00 2014,138,22:56:00 Problem Description INVALID RESPONS TA.E62A.VM2 started drifting rapidly on 2014.101 ~18:00 UTC and hit the stops on 2014.117 15:00 UTC. The N channel dc offset was in the millions of counts and its data is of suspect quality during this time period. END PROBLEM RESOLUTION REPORT DMCQC2014:0120 2014/06/26 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION TA.E62A.VM2 was recentered during a service visit. END **************************************************************************** DATA PROBLEM REPORT OSU-MT2010:012 2010/10/14 OSU-MT Anna Kelbert ES CAO05 EM * 1900,000,00:00:00 2010,189,00:00:00 Problem Description CHANNEL ORIENTATION NIMS magnetometer was misoriented so that Hx (not Hy) was close to 0 nT. Thus, Hx was pointing East and Hy was pointing South. At OSU, magnetic fields were rotated so that Hx points North. The archived time series have correct channel orientation. END PROBLEM RESOLUTION REPORT OSU-MT2010:012 2010/10/14 OSU-MT Anna Kelbert Description of Problem Resolution RESOLUTION At OSU, magnetic fields were rotated so that Hx points North. The archived time series have correct channel orientation. END **************************************************************************** DATA PROBLEM REPORT HRV1999:012 1999/03/19 Harvard WQC N.Maternovskaya ASL NWAO IU BHZ BHN BHE 1998,348,19:35:00 1998,348,19:35:00 Problem Description DATA DROPOUTS Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1999:012 2000/03/03 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Unfortunately, we are missing about 3.4 hours of BH? data from day 1998,348. The missing time span is approximately 1998,348,16:20 - 1998,348,19:44. This is not completely unexpected, as NWAO is a remote station, and comm links are good, but not perfect. Since BH? data has a higher sampling rate than LH? data, LH? data is given transfer priority when a comm link experiences trouble (since it requires less time to transfer LH? data, there is a greater chance of getting the complete data stream getting through a weak connection before it breaks off entirely). That's why we have the full LH? data stream for this day, but not all of BH?. It is unfortunate that this particular data dropout has wiped out the beginning of an event. END **************************************************************************** DATA PROBLEM REPORT DMCQC2014:0123 2014/06/30 IRIS DMC Gillian Sharer DMC N52A TA ?HZ 2014,104,13:00:00 2014,151,22:00:00 Problem Description OTHER Starting on April 14 2014 13:00 UTC, TA.N52A.?HZ had a ratty signal character, with spiky noise and sudden jumps in dc offset. END PROBLEM RESOLUTION REPORT DMCQC2014:0123 2014/06/30 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The noise resolved when the sensor was replaced on May 31 2014 22:00 UTC. The service visit found water in the vault, and this problem may have been the result of corrosion. END **************************************************************************** DATA PROBLEM REPORT OSU-MT2010:011 2010/10/14 OSU-MT Anna Kelbert ES CAN01 EM * 2010,188,00:00:00 2010,216,00:00:00 Problem Description CHANNEL ORIENTATION NIMS magnetometer was misoriented so that Hx (not Hy) was close to 0 nT. Thus, Hx was pointing West and Hy was pointing North. At OSU, magnetic fields were rotated so that Hx points North. The archived time series have correct channel orientation. END PROBLEM RESOLUTION REPORT OSU-MT2010:011 2010/10/14 OSU-MT Anna Kelbert Description of Problem Resolution RESOLUTION At OSU, magnetic fields were rotated so that Hx points North. The archived time series have correct channel orientation. END **************************************************************************** DATA PROBLEM REPORT HRV1999:011 1999/03/19 Harvard WQC N.Maternovskaya ASL BILL IU BHZ 1998,350,00:18:00 1998,350,00:18:00 Problem Description DATA GLITCHES Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1999:011 2000/03/03 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The STS1-Z was pegged at this point in time. For the full time span of the problem, please see ASL2000:054. END **************************************************************************** DATA PROBLEM REPORT DMCQC2014:0122 2014/06/26 IRIS DMC Gillian Sharer DMC E58A TA * 2014,103,10:22:00 2014,103,15:16:00 Problem Description OTHER TA.E58A.VM2 was up against the stops from 2014.103 10:22-15:16 UTC. Data is suspect during this time period. END **************************************************************************** DATA PROBLEM REPORT ASL2006:055 2006/02/27 ASL DCC Valerie Peyton ASL COR IU */* 2006,058,21:49:00 2006,059,20:45:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 450 Time Uncertain. The COR data acquisition system is generating messages which indicate the system is no longer capable of synchronizing timing across all channels. This implies that although the system probably is receiving a clear signal and time stamp from the GPS system, the channels may or may not have the same time stamp when they should. Time stamps should be considered useless until the problem can be fixed. END PROBLEM RESOLUTION REPORT ASL2006:055 2006/02/28 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The COR station operator reseated the digitizer boards and restarted the system. This corrected the timing problem. Data quality returns to normal at 2006, 059, 20:45. END **************************************************************************** DATA PROBLEM REPORT ASL1997:043 1997/06/18 ASL DCC Tyler Storm ASL CHTO IU ? 1997,142,05:00:00 1997,142,14:30:00 Problem Description OTHER SEED COMMENT REFERENCE S 110 TEST DATA: Calibration, and testing in progress. Calibrations in progress. END PROBLEM RESOLUTION REPORT ASL1997:043 1997/06/18 ASL DCC Tyler Storm Description of Problem Resolution COMMENT There are two events which are moderately visible between calibration sequences: the first is 1997,142,07:50:59.7 (Mw 6.5) and the second is 1997,142,13:21:40.2 (Mw 6.1). END **************************************************************************** DATA PROBLEM REPORT DMCQC2014:0136 2014/07/11 IRIS DMC Gillian Sharer DMC W45B N4 * 2014,153,12:00:00 2014,168,15:33:00 Problem Description OTHER The N4.W45B masses drifted steadily since installation. By June 2, 2014, VM2 was at 3.7V and VM3 at 3.8V. The dc offset for the seismic channels soared to the millions of counts on June 4, and the station was not recording accurate ground motion. END PROBLEM RESOLUTION REPORT DMCQC2014:0136 2014/07/11 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION Although the metadata and installation report documented an STS-2 sensor, the service visit on June 17, 2014 found a Trillium 240 sensor in place. The sensor was swapped and the masses centered. The metadata was modified on June 24 to account for the correct sensor type. END **************************************************************************** DATA PROBLEM REPORT ASL2006:056 2006/02/27 ASL DCC Valerie Peyton ASL PAB IU 00/*H* 2006,001,12:36:00 2006,001,21:15:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The masses of all three components of the STS1 at PAB have fallen against their stops. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2006:056 2006/02/27 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The PAB station operator recentered the STS1 masses. Data quality returns to normal at 2006, 001, 21:15. END **************************************************************************** DATA PROBLEM REPORT ASL1997:042 1997/06/18 ASL DCC Tyler Storm ASL CASY IU BHZ, LHZ, VHZ, UHZ 1996,343,00:00:00 1998,086,07:30:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. Vertical channels are dead. END PROBLEM RESOLUTION REPORT ASL1997:042 2000/09/21 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The data from STS-1 Z at CASY return to normal quality on 1998,090,01:00. END **************************************************************************** DATA PROBLEM REPORT DMCQC2014:0135 2014/07/10 IRIS DMC Gillian Sharer DMC M04C TA * 2014,094,03:05:00 2014,105,20:14:00 Problem Description DATA LOGGER PROBLEM From April 4-15, 2014, TA.M04C's digitizer rebooted 31 times affecting data continuity. END PROBLEM RESOLUTION REPORT DMCQC2014:0135 2014/07/10 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The adverse behavior stopped after the Q330 digitizer was replaced. END **************************************************************************** DATA PROBLEM REPORT ASL2006:057 2006/02/27 ASL DCC Valerie Peyton ASL PAB IU 00/*H* 2006,005,21:45:00 2006,007,00:51:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The masses of all three components of the STS1 at PAB have fallen against their stops. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2006:057 2006/02/27 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The PAB station operator recentered the STS1 masses. Data quality returns to normal at 2006, 007, 00:51. END **************************************************************************** DATA PROBLEM REPORT ASL1997:045 1997/06/26 ASL DCC Tyler Storm ASL BDFB GT BHZ,BHN,BHE,LHZ,LHN,LHE,VHZ,VHN,VHE 1997,128,00:00:00 1997,128,00:00:00 Problem Description DATA GLITCHES SEED COMMENT REFERENCE C 4520 Channel has occasional spiking. There are glitches present in the BDFB data. They occur daily, starting around 12:00 UTC, and continue for around five to nine hours. END PROBLEM RESOLUTION REPORT ASL1997:045 2000/06/15 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The last spiking sequence of this kind ends at 1998,220,20:50. END **************************************************************************** DATA PROBLEM REPORT DMCQC2014:0138 2014/07/18 IRIS DMC Gillian Sharer DMC W50A TA * 2014,068,15:00:00 2014,071,18:30:00 Problem Description INVALID RESPONS Sometime between 2014.068 15:00 UTC and 2014.071 08:57 UTC, N4.W50A.VM1 and VM3 came up against the stops and the station stopped recording accurate seismic data. END PROBLEM RESOLUTION REPORT DMCQC2014:0138 2014/07/18 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The N4.W50A masses were successfully re-centered on 2014.071 18:30 UTC. END **************************************************************************** DATA PROBLEM REPORT ASL2006:058 2006/02/28 ASL DCC Valerie Peyton ASL QSPA IU 20/* 2006,058,22:03:00 2006,059,17:15:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The QSPA STS2 masses are pegged. Very large events might be observable, but beyond that, data are not useable. END PROBLEM RESOLUTION REPORT ASL2006:058 2006/02/28 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION We were able to remotely recenter the QSPA STS2. Data quality returns to normal at 2006, 059, 17:15. END **************************************************************************** DATA PROBLEM REPORT ASL1997:044 1997/06/20 ASL DCC Tyler Storm ASL BILL IU EHN, EHE, SHN, SHE, 10/?HE, 10/?HN 1995,228,00:00:00 1995,228,00:00:00 Problem Description POLARITY REVERSED SEED COMMENT REFERENCE C 4710 Channel has reversed polarity. GS-13 data have reversed polarity. END PROBLEM RESOLUTION REPORT ASL1997:044 2000/06/20 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION This polarity reversal is also documented in the meta-data (or dataless SEED). Thus, if rdseed is used to extract these data, and if the option to check reversals is used, the data will be extracted with the proper polarity. Please be sure to use the most recent version of the IU/BILL dataless SEED. END **************************************************************************** DATA PROBLEM REPORT DMCQC2014:0137 2014/07/18 IRIS DMC Gillian Sharer DMC P40B N4 * 2014,176,22:00:00 2014,191,23:21:00 Problem Description INVALID RESPONSE From Jun 25, 2014 22:00 UTC to July 10, 2014 23:21 UTC, N4.P40B.VM[23] were at or near the stops. Data recorded during this time is suspect. END PROBLEM RESOLUTION REPORT DMCQC2014:0137 2014/07/18 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION N4.P40B resumed normal operations after a mass recenter. END **************************************************************************** DATA PROBLEM REPORT ASL2006:051 2006/02/23 ASL DCC Valerie Peyton ASL ULN IU 00/* 2006,053,13:56:00 2006,054,02:45:00 Problem Description OTHER SEED COMMENT REFERENCE C 1840 Calibration data Calibrations were run on the ULN STS1 seismometers during this time. END PROBLEM RESOLUTION REPORT ASL2006:051 2006/02/23 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The ULN STS1 calibrations ended at 2006, 054, 02:45. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT HRV1999:007 1999/02/24 Harvard WQC N.Maternovskaya ASL JTS II LHE BHE 1998,323,15:39:00 1998,323,15:39:00 Problem Description DRIFTING Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1999:007 1999/02/24 IDA Peter Davis Description of Problem Resolution COMMENT The instrument is indeed drifting. All STS1 sensors at JTS have been difficult to set up (see DPRs IDA1996:001, IDA1997:006 and IDA1998:011). We are discussing with the manufacturer what might be malfunctioning to give the behavior we have observed. END **************************************************************************** DATA PROBLEM REPORT ASL2006:052 2006/02/23 ASL DCC Valerie Peyton ASL ULN IU 10/* 2006,054,02:34:00 2006,054,11:45:00 Problem Description OTHER SEED COMMENT REFERENCE C 1840 Calibration data Calibrations were run on the ULN S13 seismometers during this time. END PROBLEM RESOLUTION REPORT ASL2006:052 2006/02/23 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The ULN S13 calibrations ended at 2006, 054, 11:45. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT HRV1999:006 1999/01/05 Harvard WQC N.Maternovskaya ASL TLY II LHZ BHZ 1998,245,08:37:00 1998,245,08:37:00 Problem Description NO SIGNAL Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1999:006 1999/01/11 IDA Peter Davis Description of Problem Resolution RESOLUTION The STS1-V mass was beyond its operating range from 1998,243-09:34 until 1998,246-05:30. It was recentered and again operational from that point. END **************************************************************************** DATA PROBLEM REPORT DMCQC2014:0139 2014/07/22 IRIS DMC Gillian Sharer DMC TVZX TA * 2013,305,00:00:00 2014,360,00:00:00 Problem Description INVALID RESPONSE TA.TVZX is a station designated for testing new equipment configurations. For most of the station lifetime the sensor has not been connected and the station has returned digitizer noise. At other times, the metadata and/or response may not be accurate. END **************************************************************************** DATA PROBLEM REPORT ASL2006:053 2006/02/24 ASL DCC Valerie Peyton ASL RSSD IU 00/*HZ 2005,103,12:34:00 2006,174,03:53:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4630 Response may be invalid. The Z component of the RSSD 54000 has an intermittant response problem during this time period. Noise levels are up to 40dB too high, and response to events is incorrect. Instrument response appears to recover completely between the problematic episodes, but the rest of the time data should be considered suspect. By 2006, 022, 18:08 the RSSD 54000 instrument response is wrong more than it is correct. END PROBLEM RESOLUTION REPORT ASL2006:053 2006/07/26 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The intermittant response problem on the RSSD 54000 Z component slowly died out. The last problematic response episode ended at 2006, 174, 03:53. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT HRV1999:009 1999/02/24 Harvard WQC N.Maternovskaya ASL SPA IU LHE 1998,323,15:39:00 1998,323,15:39:00 Problem Description DIGITIZER ERROR Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1999:009 2000/03/06 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Field engineers were at SPA performing station maintenance at this time, which is why the LHE channel is down at this time. For the full maintenance time span, please see ASL1999:000. END **************************************************************************** DATA PROBLEM REPORT ASL2006:054 2006/02/24 ASL DCC Valerie Peyton ASL INCN IU 00/*HZ 2006,047,13:12:00 2006,081,07:53:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The Z component of the STS1 has fallen against one of its stops. Very large events might be visible. Beyond that, data are not useable. END **************************************************************************** DATA PROBLEM REPORT ASL1997:040 1997/06/03 ASL DCC George Slad ASL SFJ IU ALL 1996,081,00:00:00 1997,154,00:00:00 Problem Description INCORRECT LOCATION A revised survey placed the station approximately 17 meters west and 8 meters lower than the previous location. The revised location is 66.9967 N 50.6156 W, elevation 365.5 m END PROBLEM RESOLUTION REPORT ASL1997:040 1997/06/03 ASL DCC George Slad Description of Problem Resolution RESOLUTION See DPR for revised location. END **************************************************************************** DATA PROBLEM REPORT HRV1999:008 1999/02/24 Harvard WQC N.Maternovskaya ASL KONO IU LHN BHN 1998,333,14:10:00 1998,333,14:10:00 Problem Description DIGITIZER ERROR Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1999:008 2000/03/06 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The STS1 N component was inoperational at this time. For the full time span of the problem, please see ASL1998:033. END **************************************************************************** DATA PROBLEM REPORT ASL2006:059 2006/02/28 ASL DCC Valerie Peyton ASL MA2 IU 00/* 2006,058,13:51:00 2006,059,02:33:00 Problem Description OTHER SEED COMMENT REFERENCE C 1840 Calibration data Calibrations were run on the MA2 STS1 seismometers during this time. END PROBLEM RESOLUTION REPORT ASL2006:059 2006/02/28 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The MA2 STS1 calibrations ended at 2006, 059, 02:33. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL1997:047 1997/07/28 ASL DCC Tyler Storm ASL LSZ IU ? 1997,113,00:00:00 2001,165,08:12:00 Problem Description DATA DROPOUTS Due to problem with commercial power, the station is forced to rely on solar power only. Typically, LSZ is up and recording data for around 12 hours a day (06:00 - 18:00 UTC). END PROBLEM RESOLUTION REPORT ASL1997:047 2006/07/17 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The power system at LSZ was upgraded during a maintenance trip in June 2001. Power and data recording are stabilized as of 2001, 165, 08:12. END **************************************************************************** DATA PROBLEM REPORT ASL1997:046 1997/07/14 ASL DCC Tyler Storm ASL SPA IU BHN, LHN, VHM, UHN 1997,109,20:00:00 1997,112,20:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. Seismometer mass was against the stop during this time frame. END PROBLEM RESOLUTION REPORT ASL1997:046 1997/07/14 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION Seismometer mass was recentered 1997,112,20:00:00. END **************************************************************************** DATA PROBLEM REPORT ASL1997:049 1997/08/06 ASL DCC Tyler Storm ASL WAKE IU *HG, *HH, *HV, *HW 1997,168,13:00:00 1997,175,13:45:00 Problem Description OTHER SEED COMMENT REFERENCE C 2200 Data quality compromised by rapid jumps in mean DC offset The mean value of these data streams jumps plus or minus 1.0e+06 counts, and remains constant for some time (anywhere from 30 minutes to several hours) and then drops back to the original mean value. Data between these large offsets appear to be ok. END PROBLEM RESOLUTION REPORT ASL1997:049 1997/08/06 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION The data are back to normal as of the middle of the day on 1997,175. The reason for the problem is unknown. END **************************************************************************** DATA PROBLEM REPORT ASL1997:048 1997/07/31 ASL DCC George Slad ASL KIP IU SH*,HH*,EH*,LL*,HL* 1995,210,19:00:00 1997,157,19:30:00 Problem Description CHANNEL ORIENTATION The STS2 and FBA-23 North component orientation is 341 deg. and the East component orientation is 71 deg. See dpr ASL1997:010 for more information. END PROBLEM RESOLUTION REPORT ASL1997:048 1997/07/31 ASL DCC George Slad Description of Problem Resolution RESOLUTION The STS2 and the FBA23 were re-oriented on 1997,157 at 19:30Z. The North is now oriented to 0 deg. and the East is oriented to 90 deg. SUPPLEMENT The correct azimuth values for this time period (for both the STS2 and the FBA23: N = 341 degrees; E = 71 degrees) are in the IU/KIP dataless seed volume. Please be sure you are using the most current verions of the dataless. The STS1 components have always had the correct orientation. END **************************************************************************** DATA PROBLEM REPORT OSU-MT2010:003 2010/10/14 OSU-MT Anna Kelbert ES CAQ01 EM * 2010,156,00:00:00 2010,207,00:00:00 Problem Description CHANNEL ORIENTATION NIMS magnetometer was misoriented so that Hx (not Hy) was close to 0 nT. Thus, Hx was pointing East and Hy was pointing South. At OSU, magnetic fields were rotated so that Hx points North. The archived time series have correct channel orientation. END PROBLEM RESOLUTION REPORT OSU-MT2010:003 2010/10/14 OSU-MT Anna Kelbert Description of Problem Resolution RESOLUTION At OSU, magnetic fields were rotated so that Hx points North. The archived time series have correct channel orientation. END **************************************************************************** DATA PROBLEM REPORT OSU-MT2010:002 2010/10/14 OSU-MT Anna Kelbert ES CAO01 EM * 2010,153,00:00:00 2010,181,00:00:00 Problem Description CHANNEL ORIENTATION NIMS magnetometer was misoriented so that Hx (not Hy) was close to 0 nT. Thus, Hx was pointing East and Hy was pointing South. At OSU, magnetic fields were rotated so that Hx points North. The archived time series have correct channel orientation. END PROBLEM RESOLUTION REPORT OSU-MT2010:002 2010/10/14 OSU-MT Anna Kelbert Description of Problem Resolution RESOLUTION At OSU, magnetic fields were rotated so that Hx points North. The archived time series have correct channel orientation. END **************************************************************************** DATA PROBLEM REPORT OSU-MT2010:005 2010/10/14 OSU-MT Anna Kelbert ES CAM05 EM * 2010,182,00:00:00 2010,231,00:00:00 Problem Description CHANNEL ORIENTATION NIMS magnetometer was misoriented so that Hx (not Hy) was close to 0 nT. Thus, Hx was pointing East and Hy was pointing South. At OSU, magnetic fields were rotated so that Hx points North. The archived time series have correct channel orientation. END PROBLEM RESOLUTION REPORT OSU-MT2010:005 2010/10/14 OSU-MT Anna Kelbert Description of Problem Resolution RESOLUTION At OSU, magnetic fields were rotated so that Hx points North. The archived time series have correct channel orientation. END **************************************************************************** DATA PROBLEM REPORT OSU-MT2010:004 2010/10/14 OSU-MT Anna Kelbert ES CAP02 EM * 2010,182,00:00:00 2010,218,00:00:00 Problem Description CHANNEL ORIENTATION NIMS magnetometer was misoriented so that Hx (not Hy) was close to 0 nT. Thus, Hx was pointing East and Hy was pointing South. At OSU, magnetic fields were rotated so that Hx points North. The archived time series have correct channel orientation. END PROBLEM RESOLUTION REPORT OSU-MT2010:004 2010/10/14 OSU-MT Anna Kelbert Description of Problem Resolution RESOLUTION At OSU, magnetic fields were rotated so that Hx points North. The archived time series have correct channel orientation. END **************************************************************************** DATA PROBLEM REPORT OSU-MT2010:007 2010/10/14 OSU-MT Anna Kelbert ES CAN04 EM * 2010,183,00:00:00 2010,265,00:00:00 Problem Description CHANNEL ORIENTATION NIMS magnetometer was misoriented so that Hx (not Hy) was close to 0 nT. Thus, Hx was pointing West and Hy was pointing North. At OSU, magnetic fields were rotated so that Hx points North. The archived time series have correct channel orientation. END PROBLEM RESOLUTION REPORT OSU-MT2010:007 2010/10/14 OSU-MT Anna Kelbert Description of Problem Resolution RESOLUTION At OSU, magnetic fields were rotated so that Hx points North. The archived time series have correct channel orientation. END **************************************************************************** DATA PROBLEM REPORT OSU-MT2010:006 2010/10/14 OSU-MT Anna Kelbert ES CAQ02 EM * 2010,183,00:00:00 2010,219,00:00:00 Problem Description CHANNEL ORIENTATION NIMS magnetometer was misoriented so that Hx (not Hy) was close to 0 nT. Thus, Hx was pointing East and Hy was pointing South. At OSU, magnetic fields were rotated so that Hx points North. The archived time series have correct channel orientation. END PROBLEM RESOLUTION REPORT OSU-MT2010:006 2010/10/14 OSU-MT Anna Kelbert Description of Problem Resolution Description of Problem Resolution RESOLUTION At OSU, magnetic fields were rotated so that Hx points North. The archived time series have correct channel orientation. END **************************************************************************** DATA PROBLEM REPORT OSU-MT2010:009 2010/10/14 OSU-MT Anna Kelbert ES CAO04 EM * 2010,187,00:00:00 2010,215,00:00:00 Problem Description CHANNEL ORIENTATION NIMS magnetometer was misoriented so that Hx (not Hy) was close to 0 nT. Thus, Hx was pointing West and Hy was pointing North. At OSU, magnetic fields were rotated so that Hx points North. The archived time series have correct channel orientation. END PROBLEM RESOLUTION REPORT OSU-MT2010:009 2010/10/14 OSU-MT Anna Kelbert Description of Problem Resolution RESOLUTION At OSU, magnetic fields were rotated so that Hx points North. The archived time series have correct channel orientation. END **************************************************************************** DATA PROBLEM REPORT OSU-MT2010:008 2010/10/14 OSU-MT Anna Kelbert ES CAO03 EM * 2010,184,00:00:00 2010,217,00:00:00 Problem Description CHANNEL ORIENTATION NIMS magnetometer was misoriented so that Hx (not Hy) was close to 0 nT. Thus, Hx was pointing East and Hy was pointing South. At OSU, magnetic fields were rotated so that Hx points North. The archived time series have correct channel orientation. END PROBLEM RESOLUTION REPORT OSU-MT2010:008 2010/10/14 OSU-MT Anna Kelbert Description of Problem Resolution RESOLUTION At OSU, magnetic fields were rotated so that Hx points North. The archived time series have correct channel orientation. END **************************************************************************** DATA PROBLEM REPORT HRV1999:003 1999/01/05 Harvard WQC N.Maternovskaya ASL DPC CZ BHZ BHN 1998,141,05:34:00 1998,141,05:34:00 Problem Description DATA DROPOUTS Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1999:003 2000/03/07 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION There were problems with data retrieval from station DPC at this time, and as a result we only have short data windows around events, instead of a full, continuous data stream. For the full time span of the problem, and more information, please see ASL2000:056 END **************************************************************************** DATA PROBLEM REPORT HRV1999:002 1999/01/05 Harvard WQC N.Maternovskaya ASL CTAO IU BHE LHE 1998,235,13:57:00 1998,235,13:57:00 Problem Description DIGITIZER PROBLEM Postscript file was placed into /pub/qc/qc_ps. END PROBLEM RESOLUTION REPORT HRV1999:002 2000/03/07 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The STS1 E component had lost mass capture at this time. For the full time span of the problem, please see ASL2000:060. END **************************************************************************** DATA PROBLEM REPORT HRV1999:005 1999/01/05 Harvard WQC N.Maternovskaya ASL KEV IU LHN LHE BHN BHE 1998,257,23:16:00 1998,257,23:16:00 Problem Description DIGITIZER PROBLEM Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1999:005 2000/03/06 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The STS1 instrument at KEV was inoperational at this time. It has been fixed. For the full time span of the problem, please see ASL1998:035. END **************************************************************************** DATA PROBLEM REPORT DMCQC2014:0130 2014/07/10 IRIS DMC Gillian Sharer DMC G58A TA * 2014,095,20:00:00 2014,133,21:15:00 Problem Description OTHER Starting on April 5, 2014 ~20:00 UTC, TA.G58A began experiencing large identical bursts of noise on all 3 UVW elements, not representative of ground motion. There was water in the vault at the time. END PROBLEM RESOLUTION REPORT DMCQC2014:0130 2014/07/10 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The sensor was replaced on May 13, 2014 20:15 UTC. However, the station continues to have significant issues. END **************************************************************************** DATA PROBLEM REPORT ASL2006:050 2006/02/22 ASL DCC Valerie Peyton ASL AFI IU 10/* 2006,053,02:34:00 2006,053,11:45:00 Problem Description OTHER SEED COMMENT REFERENCE C 1840 Calibration data Calibrations were run on the AFI STS2 seismometer during this time. END PROBLEM RESOLUTION REPORT ASL2006:050 2006/02/22 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The AFI STS2 calibrations ended at 2006, 053, 11:45. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT HRV1999:004 1999/01/05 Harvard WQC N.Maternovskaya ASL JTS II LHE 1998,245,08:37:00 1998,245,08:37:00 Problem Description DEAD CHANNEL Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1999:004 1999/01/11 IDA Peter Davis Description of Problem Resolution RESOLUTION The channel is indeed dead at the moment indicated. Performance for that day was intermittent until 1998,245-12:35 when it steadied for the balance of the day. The problem was solved when the RT303 digitizing board for the stream from the STS1-EW sensor was replaced during a repair visit on 1998,287. END **************************************************************************** DATA PROBLEM REPORT DMCQC2014:0132 2014/08/11 IRIS DMC Gillian Sharer DMC G58A TA * 2014,174,03:30:00 2014,195,15:17:00 Problem Description INVALID RESPONS Starting on June 23, 2014 03:30 UTC, TA.G58A starting exhibiting incidences of noise on its V-element along with an abnormally large amplitude response. Significant time periods when the V-element was obviously compromised include 2014.174 03:30-09:40 UTC; 2014.174 21:50-2014.177 18:40 UTC; and 2014.183 23:11-2014.195 15:17 UTC. END PROBLEM RESOLUTION REPORT DMCQC2014:0132 2014/08/11 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The station resumed normal operation after the sensor was replaced on July 14, 2014 15:17 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2014:0131 2014/07/10 IRIS DMC Gillian Sharer DMC G58A TA * 2014,133,21:15:00 2014,163,17:32:00 Problem Description OTHER TA.G58A.VM3 was at or near the stops from May 13 20:15 UTC through June 12 17:32 UTC. The station was not recording accurate ground motion during this time period. END **************************************************************************** DATA PROBLEM REPORT OSU-MT2010:001 2010/10/14 OSU-MT Anna Kelbert ES CAN06 EM * 2010,255,11:50:00 2010,279,16:33:00 Problem Description DEAD CHANNEL Dead Hz channel throughout END **************************************************************************** DATA PROBLEM REPORT HRV1999:001 1998/01/05 Harvard WQC N.Maternovskaya ASL BGCA GT BHN BHE 1998,232,06:40:00 1998,232,06:40:00 Problem Description DATA DROPOUTS Postscript file was placed into /pub/qc/qc_ps. END PROBLEM RESOLUTION REPORT HRV1999:001 2000/03/08 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Station BGCA is a remote station. Sometimes the comm links at remote stations don't operate at 100% and bits of data are lost. It appears that at this time we lost up to 200sec of BH? data and that we lost about 14 hrs of data at all sample rates on the previous day. The comm link is currently working fine. No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT DMCQC2014:0134 2014/07/10 IRIS DMC Gillian Sharer DMC I60A TA * 2014,009,03:04:00 2013,100,03:03:00 Problem Description DATA DROPOUTS From January 9, 2014 to April 4, 2014, TA.I60A's digitizer rebooted 31 times affecting data continuity. END **************************************************************************** DATA PROBLEM REPORT DMCQC2014:0133 2014/07/10 IRIS DMC Gillian Sharer DMC O60A TA * 2013,361,04:57:00 2014,018,21:52:00 Problem Description DATA LOGGER PROBLEM During this time period, TA.O60A experienced multiple digitizer reboots which severely affected data continuity. END PROBLEM RESOLUTION REPORT DMCQC2014:0133 2014/07/10 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The Q330 digitizer was replaced on January 18, 2014, resolving the issue. END **************************************************************************** DATA PROBLEM REPORT ASL2006:022 2006/02/08 ASL DCC Valerie Peyton ASL SFJD IU 00/*H* 00/*M* 2006,031,17:19:00 2006,032,05:30:00 Problem Description OTHER SEED COMMENT REFERENCE C 1840 Calibration data Calibrations were run on the SFJD STS1 seismometers during this time. END PROBLEM RESOLUTION REPORT ASL2006:022 2006/02/08 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The SFJD STS1 calibrations ended at 2006, 032, 05:30. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL1997:032 1997/04/10 ASL DCC George Slad ASL ADK IU *HE, *HN 1997,071,00:00:00 1997,078,00:00:00 Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE C 4520 Channel has occasional spiking. A low frequency pulse, with a period of approximately 24 hrs, occurrs on the BH, LH, VH, and UH channels. The is also a high frequency spike on day 1997,072. END PROBLEM RESOLUTION REPORT ASL1997:032 1997/04/10 ASL DCC George Slad Description of Problem Resolution COMMENT Correction to DPR - long period pulse occurs on horizontals only. Since the long period noise signal stopped on its own, no further action will be taken. The short period spike (on the Z, N, and E) is anomalous and therefore no further action will be taken. END **************************************************************************** DATA PROBLEM REPORT DMCQC2014:0147 2014/07/25 IRIS DMC Gillian Sharer DMC P58A TA ?HZ 2013,305,02:40:00 2013,312,01:25:00 Problem Description LOW FREQUENCY NOISE On 2013.305 02:40 UTC TA.P58A.?HZ started showing signs of distress with unusual ping-like noise and elevated long period noise. Then on 2013.310 22:23 UTC, there was a sudden onset of extremely large amplitude sensor noise that rendered the channel effectively unable to record ground motion. END PROBLEM RESOLUTION REPORT DMCQC2014:0147 2014/07/25 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The sensor returned to normal operation after the masses were remotely locked and unlocked on 2013.312 01:25 UTC. END **************************************************************************** DATA PROBLEM REPORT ASL2006:023 2006/02/08 ASL DCC Valerie Peyton ASL SFJD IU 10/*H* 2006,032,05:42:00 2006,032,14:39:00 Problem Description OTHER SEED COMMENT REFERENCE C 1840 Calibration data Calibrations were run on the SFJD STS2 seismometer during this time. END PROBLEM RESOLUTION REPORT ASL2006:023 2006/02/08 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The SFJD STS2 calibrations ended at 2006, 032, 14:39. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL1997:031 1997/04/01 ASL DCC George Slad ASL YSS IU BHZ,BHN,BHE,SHZ,SHN,SHE,LLZ,LLN,LLE 1997,060,12:25:00 1997,060,12:25:00 Problem Description SPIKES SEED COMMENT REFERENCE C 4510 Channel has frequent spiking. The continuous spiking (postive and negative) disrupts data flow for a short period (less than a minute) on the BH* and SH* and LL* channels. The spiking appears as large oscillations on VHZ channels. Problem appears to be system wide, possibly related to data logger or digitizer. END PROBLEM RESOLUTION REPORT ASL1997:031 1997/04/17 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION Please disregard Data Problem report ASL1997:031; there is not a problem. We somehow induced a decompression error (we think) when we made a secondary plot file. This error made the data look as if something was very wrong. We later looked at the original plot file, and saw the data was fine. Sorry for the confusion. END **************************************************************************** DATA PROBLEM REPORT DMCQC2014:0146 2014/07/24 IRIS DMC Gillian Sharer DMC I53A TA ?HZ 2013,317,23:50:00 2013,341,15:60:00 Problem Description OTHER From 2013.317 23:50 UTC to 2013.341 15:60 UTC, TA.I53A.?HZ data had a choppy, ratty character to it with sharp changes in dc offset and unusual long period noise, not related to ground motion. The noise disappeared after the station recovered from a power outage on 2014.341 15:60 UTC. END **************************************************************************** DATA PROBLEM REPORT ASL2006:024 2006/02/08 ASL DCC Valerie Peyton ASL TSUM IU 00/*H* 2006,034,15:23:00 2006,035,04:05:00 Problem Description OTHER SEED COMMENT REFERENCE C 1840 Calibration data Calibrations were run on the TSUM STS1 seismometers during this time. END PROBLEM RESOLUTION REPORT ASL2006:024 2006/02/08 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The TSUM STS1 calibrations ended at 2006, 035, 04:05. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL1997:034 1997/04/17 ASL DCC George Slad ASL SNZO IU * 1997,028,00:00:00 1997,127,00:00:00 Problem Description OTHER Data from SNZO is being temporarily withheld to correct a channel naming problem with the channels recorded by the KS36000i. Three days of SNZO data after 1997,028 (1997,044-046) has been released as of 1997,107. END PROBLEM RESOLUTION REPORT ASL1997:034 1997/05/07 ASL DCC George Description of Problem Resolution RESOLUTION Normal data production for SNZO has resumed. The channel naming problem has been fixed and the previously withheld data from the 36000i are being released. END **************************************************************************** DATA PROBLEM REPORT DMCQC2014:0149 2014/07/25 IRIS DMC Gillian Sharer DMC 552A TA * 2013,059,18:49:00 2013,059,23:20:00 Problem Description INVALID RESPONSE On 2013.059 18:49 UTC, the mass channels of TA.552A suddenly came up against the stops. 552A was not recording accurate ground motion during this time period. END PROBLEM RESOLUTION REPORT DMCQC2014:0149 2014/07/25 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The masses were successfully re-centered on 2013.059 23:20 UTC and the station resumed recording seismic energy. END **************************************************************************** DATA PROBLEM REPORT ASL2006:025 2006/02/08 ASL DCC Valerie Peyton ASL TSUM IU 10/*H* 2006,035,04:01:00 2006,035,13:08:00 Problem Description OTHER SEED COMMENT REFERENCE C 1840 Calibration data Calibrations were run on the TSUM STS2 seismometer during this time. END PROBLEM RESOLUTION REPORT ASL2006:025 2006/02/08 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The TSUM STS2 calibrations ended at 2006, 035, 13:08. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL1997:033 1997/04/14 ASL DCC George Slad ASL ANMO IU BH1,BH2,LH1,LH2,VH1,VH2,UH1,UH2 1997,099,16:00:00 1997,100,14:03:00 Problem Description CHANNEL ORIENTATION SEED COMMENT REFERENCE C 1835 TEST DATA The *H1,2 channels at ANMO had maintenance and testing done during this time period. The new orientation after testing is listed below. *H1 = 280 degrees, *H2 = 010 degrees END PROBLEM RESOLUTION REPORT ASL1997:033 1997/04/14 ASL DCC George Slad Description of Problem Resolution COMMENT Note ANMO has new orientations for the *H1,2 channels (see DPR ASL1997:033). END **************************************************************************** DATA PROBLEM REPORT DMCQC2014:0148 2014/07/22 IRIS DMC Gillian Sharer DMC 059Z TA * 2013,271,01:12:00 2013,271,23:25:00 Problem Description INVALID RESPONSE On 2013.271 01:12 UTC, TA.059Z.VM1 suddenly jumped to 8.8V. A few hours later at 2013.271 03:44 UTC, VM1 went to the stops at -12.6V. Sensor output is highly suspect during this time. END PROBLEM RESOLUTION REPORT DMCQC2014:0148 2014/07/22 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The sensor resumed normal data recording after a successful mass recenter on 2013.217 23:25 UTC. END **************************************************************************** DATA PROBLEM REPORT ASL2006:020 2006/02/08 ASL DCC Valerie Peyton ASL INCN IU 00/*HZ 2006,038,20:20:00 2006,044,22:50:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The Z component of the STS1 has fallen against one of its stops. For the first day or so, very large events might be visible. Beyond that, data are not useable. END PROBLEM RESOLUTION REPORT ASL2006:020 2006/02/14 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The INCN STS1 Z component is still 11.9V off-center, but the mass has drifted sufficiently towards center that data quality returns to normal at 2006, 044, 22:50. END **************************************************************************** DATA PROBLEM REPORT ASL1997:030 1997/04/01 ASL DCC George Slad ASL SFJ IU LLZ,LLN,LLE 1997,063,00:00:00 1997,063,00:00:00 Problem Description SPIKES SEED COMMENT REFERENCE C 4520 Channel has occasional spiking. The low gain sensor has frequent positive spikes on all channels. The first occurrence of the spiking is not currently known. END **************************************************************************** DATA PROBLEM REPORT ASL2006:021 2006/02/08 ASL DCC Valerie Peyton ASL ADK IU 00/* 2006,037,16:18:00 2006,038,04:38:00 Problem Description OTHER SEED COMMENT REFERENCE C 1840 Calibration data Calibrations were run on the ADK STS1 seismometers during this time. END PROBLEM RESOLUTION REPORT ASL2006:021 2006/02/08 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The ADK STS1 calibrations ended at 2006, 038, 04:38. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL1997:039 1997/06/02 ASL DCC Tyler Storm ASL SJG IU BHE, LHE, VHE, UHE 1997,117,22:49:00 1997,119,05:06:00 Problem Description SPIKES SEED COMMENT REFERENCE C 4510 Channel has frequent spiking. E/W data contain large spikes during this time frame. END PROBLEM RESOLUTION REPORT ASL1997:039 1997/06/02 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION The spiking stopped at 1997,119,05:06. Reason for the disturbance is unknown; no further action will be taken. END **************************************************************************** DATA PROBLEM REPORT ASL2006:026 2006/02/08 ASL DCC Valerie Peyton ASL YSS IU 00/*H* 2006,033,15:45:00 2006,034,04:04:00 Problem Description OTHER SEED COMMENT REFERENCE C 1840 Calibration data Calibrations were run on the YSS STS1 seismometers during this time. END PROBLEM RESOLUTION REPORT ASL2006:026 2006/02/08 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The YSS STS1 calibrations ended at 2006, 034, 04:04. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL1997:036 1997/05/03 ASL DCC Tyler Storm ASL XAN IC SHE, EHE 1997,042,00:00:00 1997,042,00:00:00 Problem Description OTHER E/W data from the STS-2 instrument is missing. END **************************************************************************** DATA PROBLEM REPORT ASL2006:027 2006/02/08 ASL DCC Valerie Peyton ASL YSS IU 10/*H* 2006,034,04:06:00 2006,034,13:18:00 Problem Description OTHER SEED COMMENT REFERENCE C 1840 Calibration data Calibrations were run on the YSS S13 seismometers during this time. END PROBLEM RESOLUTION REPORT ASL2006:027 2006/02/08 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The YSS S13 calibrations ended at 2006, 034, 13:18. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL1997:035 1997/04/30 ASL DCC Tyler Storm ASL MA2 IU SHN, SHE, EHE, EHN, 10/*HN, 10/*HE 1993,260,00:00:00 1993,260,00:00:00 Problem Description POLARITY REVERSED SEED COMMENT REFERENCE C 4710 Channel has reversed polarity. The horizontal data from the GS-13 seismometers have reversed polarity. END PROBLEM RESOLUTION REPORT ASL1997:035 2007/01/16 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The IU/MA2 dataless volume properly documents the reversed polarity of the GS-13 horizontals. Please be sure to use the most recent copy of the IU/MA2 dataless. Please also invoke the option to check for reversals and polarity when using rdseed to dump out IU/MA2 data. If you do so, and if you are using the most current dataless, rdseed will automatically correct this polarity reversal. No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT ASL2006:028 2006/02/08 ASL DCC Valerie Peyton ASL LSZ IU 00/*H* 2006,038,16:18:00 2006,039,04:58:00 Problem Description OTHER SEED COMMENT REFERENCE C 1840 Calibration data Calibrations were run on the LSZ STS1 seismometers during this time. END PROBLEM RESOLUTION REPORT ASL2006:028 2006/02/08 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The LSZ STS1 calibrations ended at 2006, 039, 04:58. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL1997:038 1997/05/30 ASL DCC Tyler Storm ASL CASY IU HHN, HHE, SHN, SHE 1996,050,00:00:00 1996,235,07:52:00 Problem Description CHANNEL ORIENTATION The horizontal data from the STS-2 instrument at CASY are misoriented by 90 degrees. The correct azimuth values are as follows: HHN, SHN - 270 HHE, SHE - 0 END PROBLEM RESOLUTION REPORT ASL1997:038 2000/09/21 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The station operator at CASY re-oriented in the STS-2 on 1996,235,07:52 After this time the STS-2 orientation is correct. The 185 days of misorientation are being corrected for in the CASY dataless. When using data during this time period, the orientation can be corrected by invoking the "check reversal" option in rdseed. END **************************************************************************** DATA PROBLEM REPORT ASL2006:029 2006/02/08 ASL DCC Valerie Peyton ASL LSZ IU 10/*H* 2006,039,04:55:00 2006,039,14:03:00 Problem Description OTHER SEED COMMENT REFERENCE C 1840 Calibration data Calibrations were run on the LSZ STS2 seismometer during this time. END PROBLEM RESOLUTION REPORT ASL2006:029 2006/02/08 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The LSZ STS2 calibrations ended at 2006, 039, 14:03. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL1997:037 1997/05/03 ASL DCC Tyler Storm ASL HKT IU BH*, LH*, VH*, UH*, 00/*H* 1995,192,00:00:00 1995,192,00:00:00 Problem Description SPIKES SEED COMMENT REFERENCE C 4520 Channel has occasional spiking. The broad-band data contain several large spikes per day. END PROBLEM RESOLUTION REPORT ASL1997:037 2002/05/27 ASL DCC Valerie Peyton Description of Problem Resolution COMMENT The vault at HKT is located in an active salt mine. Consequently, the pier is subject to tilting as well as mining-related machine noise on a regular basis. During weekends and holidays the spikes do not appear; however, spikes are to be expected at random intervals during working hours. END **************************************************************************** DATA PROBLEM REPORT DMCQC2014:0141 2014/07/22 IRIS DMC Gillian Sharer DMC G59A TA * 2014,095,02:00:00 2014,098,23:17:00 Problem Description INVALID RESPONSE From 2014.095 02:00 UTC to 2014.098 23:17 UTC, TA.G59A.VM1 was up against the stops and the station was not recording accurate seismic data. This vault has been unstable since installation, with frequent mass recenters needed. END **************************************************************************** DATA PROBLEM REPORT DMCQC2014:0140 2014/07/22 IRIS DMC Gillian Sharer DMC G59A TA * 2014,015,13:50:00 2014,131,18:05:00 Problem Description OTHER From January to May 2014, TA.G59A.?HZ experienced large bursts of noise off and on. This noise is not reflective of ground motion and was likely caused by corrosion. END PROBLEM RESOLUTION REPORT DMCQC2014:0140 2014/07/22 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION A service visit on May 11, 2014 found water in the vault and corroded wiring. The VIE and baler were replaced and the noise has not been seen since. However, the station continues to have problems with water infiltration and the issue may recur in the future. END **************************************************************************** DATA PROBLEM REPORT DMCQC2014:0143 2014/07/22 IRIS DMC Gillian Sharer DMC V53A N4 * 2014,075,17:35:00 2014,081,14:14:00 Problem Description OTHER N4.V53A.VM1 stopped responding to mass recenter requests. For most of the time period 2014.075 17:35 UTC-2014.081 14:14 UTC, VM1 was at ~ -6.5V. It was against or near the stops on 2014.076 18:30-18:35 UTC and from 2014.077 06:41-18:30 UTC. The data record has numerous spikes from failed mass recenter attempts. END PROBLEM RESOLUTION REPORT DMCQC2014:0143 2014/07/22 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION A service visit on 2014.081 was able to recenter the masses and restore normal station operation. END **************************************************************************** DATA PROBLEM REPORT DMCQC2014:0142 2014/07/22 IRIS DMC Gillian Sharer DMC V53A TA * 2014,081,12:50:00 2014,081,14:01:00 Problem Description INVALID RESPONSE A service visit arrived at N4.V53A on March 22, 2014 ~12:50 UTC. While service personnel were there, they changed the response of the broadband sensor from 2 minutes to 1 second period temporarily. It's unclear exactly when the change happened, but the service report noted that it lasted for tens of minutes and ended at 14:00 UTC. END PROBLEM RESOLUTION REPORT DMCQC2014:0142 2014/07/22 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION END **************************************************************************** DATA PROBLEM REPORT DMCQC2014:0145 2014/07/24 IRIS DMC Gillian Sharer DMC Z58A TA * 2014,047,08:40:00 2014,048,23:03:00 Problem Description LOW FREQUENCY NOISE TA.Z58A.?HZ had a sudden onset of high amplitude long period noise (>10 seconds) on 2014.047 08:40 UTC, not related to ground motion. END PROBLEM RESOLUTION REPORT DMCQC2014:0145 2014/07/24 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION Z58A resumed normal function on 2014.048 23:03 UTC after a remote mass lock and unlock was performed. END **************************************************************************** DATA PROBLEM REPORT DMCQC2014:0144 2014/07/22 IRIS DMC Gillian Sharer DMC V53A TA * 2012,141,15:45:00 2012,189,13:13:00 Problem Description OTHER From installation, TA.V53A.VM1 would not respond to automated mass recenter requests. The data record is contaminated with multiple spikes per day as a result of the mass recenter attempts (triggered at 5V). The spikes stop between 2014.153-2014.177 after the station was apparently added to the MRC exclusion list. There are three time periods when VM1 is against or near the stops: 2014.146 06:41-18:30 UTC; 2014.150 12:40-18:30 UTC, and 2012.177 15:17-23:41 UTC. For the majority of the time, VM1 is around -6V. END PROBLEM RESOLUTION REPORT DMCQC2014:0144 2014/07/22 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The sensor was successfully centered during a service visit on July 7, 2014. END **************************************************************************** DATA PROBLEM REPORT ASL2006:033 2006/02/13 ASL DCC Valerie Peyton ASL QSPA IU 20/*H* 2006,039,22:08:00 2006,040,18:31:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The QSPA STS2 masses are pegged. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2006:033 2006/02/13 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION We were able to remotely recenter the QSPA STS2. Data quality returns to normal at 2006, 040, 18:31. END **************************************************************************** DATA PROBLEM REPORT ASL1997:021 1997/03/07 ASL DCC Tyler Storm ASL SSE IC BHZ,BHN,BHE,LHZ,LHN,LHE,VHZ,VHN,VHE 1997,008,01:30:00 1997,008,10:00:00 Problem Description SPIKES SEED COMMENT REFERENCE C 4510 Channel has frequent spiking. Data is unuseable due to excessive spiking. END PROBLEM RESOLUTION REPORT ASL1997:021 1997/03/07 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION I don't know what caused the problem, but since it was so close to an eight hour period I am assuming somebody was working in the vault. No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT DMCQC2014:0158 2014/08/15 IRIS DMC Gillian Sharer DMC T47A TA ?HZ 2014,208,05:38:00 2014,223,21:47:00 Problem Description LOW FREQUENCY NOISE N4.T47A.?HZ began to have problems with excessive long period noise on 2014.208 05:38 UTC. There are indications that the bilge pump was running at the time. The instrument noise became very large on 2014.218 03:53 UTC and continued intermittently until the sensor masses were locked on 2014.223 19:22 UTC. END PROBLEM RESOLUTION REPORT DMCQC2014:0158 2014/08/15 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION N4.T47A resumed operation with normal noise levels after the sensor masses were unlocked on 2014.223 21:47 UTC. END **************************************************************************** DATA PROBLEM REPORT ASL2006:034 2006/02/13 ASL DCC Valerie Peyton ASL KBS IU 00/*H* 2006,040,14:00:00 2006,041,02:40:00 Problem Description OTHER SEED COMMENT REFERENCE C 1840 Calibration data Calibrations were run on the KBS STS1 seismometers during this time. END PROBLEM RESOLUTION REPORT ASL2006:034 2006/02/13 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The KBS STS1 calibrations ended at 2006, 041, 02:40. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL1997:020 1997/03/05 ASL DCC Tyler Storm ASL XAN IC BHN,LHN,VHN,UHN 1997,020,00:00:00 1997,025,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE C 4450 Channel has frequent negative pulses. Large negative pulses are present in the n/s data. END PROBLEM RESOLUTION REPORT ASL1997:020 1997/03/05 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION After 25 Jan, the problem diminished significantly. However, some negative pulses are still present. END **************************************************************************** DATA PROBLEM REPORT DMCQC2014:0157 2014/12/18 IRIS DMC Gillian Sharer DMC M44A N4 */*/R 2014,180,23:31:00 2014,239,20:22:00 Problem Description DATA DROPOUTS Starting on 2014.180 23:31 UTC, N4.M44A near real-time data has hundreds of gaps per day due to telemetry issues. END PROBLEM RESOLUTION REPORT DMCQC2014:0157 2014/12/18 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION Communications were restored after a service visit on August 27, 2014. END **************************************************************************** DATA PROBLEM REPORT ASL2006:035 2006/02/13 ASL DCC Valerie Peyton ASL KBS IU 10/*H* 2006,041,02:37:00 2006,041,11:45:00 Problem Description OTHER SEED COMMENT REFERENCE C 1840 Calibration data Calibrations were run on the KBS STS2 seismometer during this time. END PROBLEM RESOLUTION REPORT ASL2006:035 2006/02/13 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The KBS STS2 calibrations ended at 2006, 041, 11:45. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL1997:023 1997/03/13 ASL DCC Tyler Storm ASL PMSA IU ? 1996,361,18:45:00 1996,361,22:45:00 Problem Description OTHER Large pulses on all components. END PROBLEM RESOLUTION REPORT ASL1997:023 1997/03/13 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION People were working in the vault during this time frame. END **************************************************************************** DATA PROBLEM REPORT ASL2006:036 2006/02/13 ASL DCC Valerie Peyton ASL COLA IU 00/* 2006,039,14:02:00 2006,040,02:59:00 Problem Description OTHER SEED COMMENT REFERENCE C 1840 Calibration data Calibrations were run on the COLA 54000 seismometer during this time. END PROBLEM RESOLUTION REPORT ASL2006:036 2006/02/13 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The COLA 54000 calibrations ended at 2006, 040, 02:59. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL1997:022 1997/03/11 ASL DCC Tyler Storm ASL DPC CZ VHZ 1995,246,16:40:00 1998,159,02:05:00 Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE C 4500 Channel has high noise background. There is low-frequency noise on the VHZ data stream about 90% of the time. The amplitude of the noise is consistent, and it begins and ends very abruptly. END PROBLEM RESOLUTION REPORT ASL1997:022 2003/05/15 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The low-frequency noise on the VHZ data stream from DPC appears to be gone after 1998, 159, 02:05. END **************************************************************************** DATA PROBLEM REPORT DMCQC2014:0159 2014/08/15 IRIS DMC Gillian Sharer DMC 435B TA ?HZ 2014,214,19:11:00 2014,215,15:44:00 Problem Description LOW FREQUENCY NOISE From 2014.214 19:11 to 2014.215 15:44 UTC, TA.435B had unusually high levels of long period instrument noise (periods > 5 seconds). END PROBLEM RESOLUTION REPORT DMCQC2014:0159 2014/08/15 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The noise resolved spontaneously. END **************************************************************************** DATA PROBLEM REPORT HRV1999:029 1999/11/24 Harvard WQC N.Maternovskaya ASL SFJ IU 00/BHE, 00/LHE 1999,226,00:16:00 1999,226,00:16:00 Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE C 4500 Channel has high noise background. Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1999:029 2000/02/24 ASL DCC Valerie Peyton Description of Problem Resolution COMMENT Yes, there often is low signal to noise for this station. Please also see ASL1996:028. END **************************************************************************** DATA PROBLEM REPORT ASL2006:030 2006/02/08 ASL DCC Valerie Peyton ASL PAYG IU 00/*H* 2006,032,17:07:00 2006,033,06:22:00 Problem Description OTHER SEED COMMENT REFERENCE C 1840 Calibration data Calibrations were run on the PAYG 54000 seismometer during this time. END PROBLEM RESOLUTION REPORT ASL2006:030 2006/02/08 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The PAYG 54000 calibrations ended at 2006, 033, 06:22. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT HRV1999:028 1999/11/24 Harvard WQC N.Maternovskaya ASL SFJ IU BHN LHN 1999,226,00:16:00 1999,226,00:16:00 Problem Description DIGITIZER ERROR Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1999:028 2000/02/24 ASL DCC Valerie Peyton Description of Problem Resolution COMMENT The N/S channel at SFJ was down at this time. Please aslo see ASL1999:050. END **************************************************************************** DATA PROBLEM REPORT ASL2006:031 2006/02/10 ASL DCC Tyler Storm ASL CASY IU 00/?HZ 2006,040,14:10:00 2006,047,02:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The mass in the vertical STS-1 is against a stop. Data are unuseable. END PROBLEM RESOLUTION REPORT ASL2006:031 2006/02/16 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The CASY STS1 Z mass has fallen away from its stop by itself. Data quality returns to normal at 2006, 047, 02:00. END **************************************************************************** DATA PROBLEM REPORT ASL2006:032 2006/02/13 ASL DCC Valerie Peyton ASL KBS IU 00/*H* 2006,043,22:22:00 2006,059,11:04:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. All three channels of the KBS STS1 went to digitizer noise simultaneously. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2006:032 2006/02/28 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The KBS station operator replaced the DMA-1 and converter for the STS1 instruments. Data quality returns to normal at 2006, 059, 11:04. END **************************************************************************** DATA PROBLEM REPORT ASL1997:029 1997/03/31 ASL DCC George Slad ASL KONO IU BHZ,LHZ,VHZ,UHZ 1997,056,02:00:00 1997,056,02:00:00 Problem Description NOISE SEED COMMENT REFERENCE C 4500 Channel has high noise background. Noise levels drastically increased on the vertical channels BHZ,LHZ,BHZ,UHZ. Possible cause - vacuum loss. END PROBLEM RESOLUTION REPORT ASL1997:029 1997/05/30 ASL DCC George Slad Description of Problem Resolution RESOLUTION On May 5 (125), 1997 at 20Z the bell jar was evacuated. Noise levels have fallen back to normal. END **************************************************************************** DATA PROBLEM REPORT ASL1997:028 1997/03/31 ASL DCC George Slad ASL TIXI IU BHZ,LHZ,VHZ,UHZ 1997,005,06:40:00 1997,005,07:00:00 Problem Description SPIKES SEED COMMENT REFERENCE C 4520 Channel has occasional spiking. A large positive spike occurred during this time interval. END PROBLEM RESOLUTION REPORT ASL1997:028 1997/03/31 ASL DCC George Slad Description of Problem Resolution RESOLUTION The spike appears to be an isolated incident. No further action will be taken at this time. END **************************************************************************** DATA PROBLEM REPORT IDA2007:056 2007/09/12 IDA DCC Erik Klimczak IDA RAYN II *** 2007,180,00:00:00 2007,180,00:00:00 Problem Description OTHER IDA station RAYN is down as of about day 2007,180 due to problems with the ISP that are yet to be determined. END PROBLEM RESOLUTION REPORT IDA2007:056 2008/12/11 IDA DCC Erik Klimczak Description of Problem Resolution RESOLUTION IDA station RAYN was upgraded to a Quanterra Q330HR system and is operational as of about day 2008,332. END **************************************************************************** DATA PROBLEM REPORT ASL2006:037 2006/02/13 ASL DCC Valerie Peyton ASL COLA IU 10/* 2006,040,02:59:00 2006,040,12:07:00 Problem Description OTHER SEED COMMENT REFERENCE C 1840 Calibration data Calibrations were run on the COLA STS2 seismometer during this time. END PROBLEM RESOLUTION REPORT ASL2006:037 2006/02/13 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The COLA STS2 calibrations ended at 2006, 040, 12:07. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL1997:025 1997/03/17 ASL DCC Tyler Storm ASL PTGA IU BHZ, LHZ, VHZ, UHZ 1996,350,00:00:00 1996,350,00:00:00 Problem Description NOISE SEED COMMENT REFERENCE C 4500 Channel has high noise background. The vertical data is extremely noisy. END PROBLEM RESOLUTION REPORT ASL1997:025 1997/03/17 ASL DCC Tyler Storm Description of Problem Resolution COMMENT Around the middle of 96, the station went down after a lighting strike fried some of the power equipment. A field engineer managed to get the system running again during a two day, unscheduled trip, but the data hasn't looked good since the station was revived. I'm assuming the lightning strike must have done some down hole damage as well. Presently, it is unclear when we can have someone visit the station. No further action until then. SUPPLEMENT on 1999,092,23:40. END **************************************************************************** DATA PROBLEM REPORT ASL2006:038 2006/02/14 ASL DCC Valerie Peyton ASL DAV IU 00/*H 2006,044,01:18:00 2006,044,01:18:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. All three channels of the DAV STS1 are recording identical noise. Data are not useable. END **************************************************************************** DATA PROBLEM REPORT ASL1997:024 1997/03/14 ASL DCC Tyler Storm ASL TATO IU BHN,BHE,LHN,LHE,VHN,VHE,UHN,UHE 1996,365,19:47:00 1996,365,19:55:00 Problem Description OTHER There is a large positive pulse on the horizontal data, during this time frame. END PROBLEM RESOLUTION REPORT ASL1997:024 1997/03/14 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION Appears to have been an isolated incident. No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT ASL2006:039 2006/02/14 ASL DCC Valerie Peyton ASL TIXI IU 00/*HN 2006,020,11:45:00 2006,055,08:25:00 Problem Description NOISE SEED COMMENT REFERENCE C 4507 Channel has excessively high noise levels. Poor mass position of the TIXI STS1 N component is creating excessive noise. Only very large events are visible. The station operator has been asked to recenter the instrument. END PROBLEM RESOLUTION REPORT ASL2006:039 2006/02/24 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The TIXI station operator recentered the STS1 N component. Data quality returns to normal at 2006, 055, 08:25. END **************************************************************************** DATA PROBLEM REPORT ASL1997:027 1997/03/20 ASL DCC Tyler Storm ASL TIXI IU BHN, LHN, VHN, UHN, *HE, 00/*HN, 00/*HE 1995,227,00:00:00 1995,227,00:00:00 Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE C 4500 Channel has high noise background. There is low-frequency noise on the n/s data streams from the STS-1 instrument. END PROBLEM RESOLUTION REPORT ASL1997:027 1997/03/20 ASL DCC Tyler Storm Description of Problem Resolution COMMENT There doesn't appear to be anything wrong with the equipment. No further action will be taken. SUPPLEMENT Both horizontal components of the STS1 at TIXI intermittantly exhibit high levels of low-frequency noise. The noise appears mostly to be weather-related and is definitely a function of the vault location. This noise will continue to come and go unless the station is moved. END **************************************************************************** DATA PROBLEM REPORT ASL1997:026 1997/03/20 ASL DCC George Slad ASL VNDA GT BHE,BHN,VHE,VHN,LHE,LHN 1993,362,00:00:00 1993,362,00:00:00 Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE C 4500 Channel has high noise background. Long period noise on horizontals. END PROBLEM RESOLUTION REPORT ASL1997:026 1997/03/20 ASL DCC George Slad Description of Problem Resolution COMMENT The problem is probably not instrument related. The long period noise is most likely convection within the borehole. No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT HRV1999:025 1999/09/09 Harvard WQC N.Maternovskaya ASL WVT IU BH LH 1999,157,07:08:00 1999,157,07:08:00 Problem Description DIGITIZER ERROR Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1999:025 2000/02/28 ASL DCC Valerie Peyton Description of Problem Resolution COMMENT All channels at WVT were down at this time; they came back up 1999, 176. Please also see ASL1999:037. END **************************************************************************** DATA PROBLEM REPORT DMCQC2014:0150 2014/07/25 IRIS DMC Gillian Sharer DMC 758A TA * 2013,203,01:33:00 2013,241,23:59:00 Problem Description INVALID RESPONSE On 2013.203 01:33 UTC, TA.758A.VM2 came up against the stops and the sensor stopped responding to remote mass recenter attempts. Seismic data recorded at 758A during this time period is suspect. END PROBLEM RESOLUTION REPORT DMCQC2014:0150 2014/07/25 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION TA.758A.VM2 came off the stops on 2013.233 19:09 UTC following a calibration pulse, but continued to show abnormal spikes until the station was removed on 2013.235. END **************************************************************************** DATA PROBLEM REPORT HRV1999:024 1999/09/09 Harvard WQC N.Maternovskaya ASL PTGA IU BH 1999,000,99:12:16 1999,000,99:12:16 Problem Description DIGITIZER ERROR Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1999:024 2000/02/28 ASL DCC Valerie Peyton Description of Problem Resolution COMMENT Field engineers were testing the 00 instrument at this time, so only digitizer noise was recorded. Please also see ASL2000:034. END **************************************************************************** DATA PROBLEM REPORT HRV1999:027 1999/11/24 Harvard WQC N.Maternovskaya ASL HNR IU 00/LHZ, 00/BHZ 1999,192,14:14:00 1999,192,14:14:00 Problem Description DEAD CHANNEL No signal. Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1999:027 2000/02/23 ASL DCC Valerie Peyton Description of Problem Resolution COMMENT The 00-Z channel is dead. Please also see ASL1999:055. END **************************************************************************** DATA PROBLEM REPORT DMCQC2014:0152 2014/07/25 IRIS DMC Gillian Sharer DMC V55A TA ?HN 2014,198,20:32:00 2014,198,23:26:00 Problem Description INVALID RESPONS TA.V55A.VM2 started drifting on 2014.198 20:32 UTC and rapidly came up against the stops. When this happened, V55A.?HN stopped recording accurate ground motion. END PROBLEM RESOLUTION REPORT DMCQC2014:0152 2014/07/25 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION V55A.VM2 was successfully re-centered on 2014.198 23:26 UTC and the station resumed normal operation. END **************************************************************************** DATA PROBLEM REPORT HRV1999:026 1999/11/24 Harvard WQC N.Maternovskaya ASL DAV IU LHE BHE 1999,190,05:04:00 1999,190,05:04:00 Problem Description LOW FREQUENCY NOISE Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1999:026 2000/02/24 ASL DCC Valerie Peyton Description of Problem Resolution COMMENT Yes, the E/W channel of the STS1 at DAV is noisy and out of tune. Please also see ASL1999:010. END **************************************************************************** DATA PROBLEM REPORT DMCQC2014:0151 2014/07/25 IRIS DMC Gillian Sharer DMC O48A TA ?HN 2014,175,19:42:00 2014,194,18:53:00 Problem Description LOW FREQUENCY NOISE From 2014.175 19:42 UTC - 2014.194 18:53 UTC, TA.O48A.?HN experienced high levels of long period sensor noise (>10 seconds). END PROBLEM RESOLUTION REPORT DMCQC2014:0151 2014/07/25 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION Noise on TA.O48.?HZ returned to normal levels after a remote mass lock and unlock was performed on 2014.194 18:53 UTC. END **************************************************************************** DATA PROBLEM REPORT HRV1999:021 1999/09/09 Harvard WQC N.Maternovskaya ASL FURI IU LHE 1999,169,10:55:00 1999,169,10:55:00 Problem Description DIGITIZER PROBLEM Postscript file was placed into /pub/qc/qc_ps # END PROBLEM RESOLUTION REPORT HRV1999:021 2000/02/28 ASL DCC Valerie Peyton Description of Problem Resolution COMMENT The CMG3-T instrument was inoperational at this time. For the full time span of the problem, please also see ASL1999:033. END **************************************************************************** DATA PROBLEM REPORT DMCQC2014:0154 2014/09/25 IRIS DMC Gillian Sharer DMC Q51A N4 ?HN 2014,167,18:25:00 2014,257,22:00:00 Problem Description DEAD CHANNEL N4.Q51A.?HN started showing signs of distress on 2014.167 18:25 UTC with unusual ping-like/spiky noise. By 2014.173 the noise became worse, severely contaminating the multiple Kermadec Islands and Aleutian Islands events on June 23-24. On 2014.176 10:36 UTC Q51A.VM2 hit the stops and the channel returned digitizer noise. END PROBLEM RESOLUTION REPORT DMCQC2014:0154 2014/09/25 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The data problem was resolved on 2014.257 22:00 UTC when the sensor was replaced. END **************************************************************************** DATA PROBLEM REPORT OSU-MT2010:020 2010/10/14 OSU-MT Anna Kelbert ES CAP01 EM * 2010,204,00:00:00 2010,214,00:00:00 Problem Description CHANNEL ORIENTATION NIMS magnetometer was misoriented so that Hx (not Hy) was close to 0 nT. Thus, Hx was pointing West and Hy was pointing North. At OSU, magnetic fields were rotated so that Hx points North. The archived time series have correct channel orientation. END PROBLEM RESOLUTION REPORT OSU-MT2010:020 2010/10/14 OSU-MT Anna Kelbert Description of Problem Resolution RESOLUTION At OSU, magnetic fields were rotated so that Hx points North. The archived time series have correct channel orientation. END **************************************************************************** DATA PROBLEM REPORT HRV1999:020 1999/09/09 Harvard WQC N.Maternovskaya ASL DAV IU LHE BHE 1999,126,23:00:00 1999,126,23:00:00 Problem Description LOW FREQUENCY NOISE Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1999:020 2000/02/28 ASL DCC Valerie Peyton Description of Problem Resolution COMMENT The E/W channel of the STS1 at DAV is noisy and out of tune. Please also see ASL1999:010. END **************************************************************************** DATA PROBLEM REPORT DMCQC2014:0153 2014/09/25 IRIS DMC Gillian Sharer DMC N33B N4 * 2014,155,05:00:00 2014,246,20:30:00 Problem Description INVALID RESPONSE N4.N33B mass channels started drifting rapidly on 2014.155 ~05:00 UTC. One or more of the masses were at or near the stops from 2014.155 13:40-15:17 UTC, 2014.179 13:45-19:08 UTC, and 2014.188 23:20-2014.246 20:30 UTC. N4.N33B was not recording accurate ground motion during this time period. END PROBLEM RESOLUTION REPORT DMCQC2014:0153 2014/09/25 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION N4.N33B resumed normal operation after the sensor was re-leveled during a service visit. END **************************************************************************** DATA PROBLEM REPORT HRV1999:023 1999/09/09 Harvard WQC N.Maternovskaya ASL NWAO IU 10/*HE 10/*HN 10/*H1 10/*H2 1999,055,03:00:00 2001,257,07:04:00 Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE C 4500 Channel has high noise background. Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1999:023 2000/02/28 ASL DCC Valerie Peyton Description of Problem Resolution COMMENT The low frequency noise observed on the 10/LHE & N data in this time window is a result of the installation configuration: these data are coming from a CMG3-T-B, which, although a borehole instrument, is barely 2 meters below the surface in a borehole tube that is black and was not covered until at least a month after this data window. Temperature fluctuations and wind conspired to make the horizontals noisy. The borehole tube has since been covered, which provides better, though not perfect, insulation from the elements. This instrument will continue to show environmental effect to a greater degree than the 00 instrument, which is a KS36000I and is buried 100 meters below the surface, unless someone decides to lower the CMG3-T-B (unlikely). SUPPLEMENT The KS36000I at NWAO was replaced with a KS54000. In the process, the CMG3-T-B had to be temporarily removed from the borehole. Upon reinstallation of the CMG3-T-B, it was decided to lower it further into the borehole to reduce background noise levels; the CMG3-T-B at NWAO is now located roughly 9.1meters below the surface. This added depth has made a significant difference in the background noise levels on the horizontal components. Data quality is much improved. END **************************************************************************** DATA PROBLEM REPORT DMCQC2014:0156 2014/09/25 IRIS DMC Gillian Sharer DMC E46A TA * 2014,176,19:08:00 2014,232,22:00:00 Problem Description DEAD CHANNEL N4.E46A suddenly stopped recording most frequencies on 2014.176 19:08 UTC. END PROBLEM RESOLUTION REPORT DMCQC2014:0156 2014/09/25 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The sensor was replaced on 2014.232 22:00 UTC and the station began recording seismic data again. END **************************************************************************** DATA PROBLEM REPORT HRV1999:022 1999/09/09 Harvard WQC N.Maternovskaya ASL KEV IU 00/BH?, 00/VH?, 00/LH?, 00/UH? 1999,120,16:41:00 1999,137,07:04:00 Problem Description DIGITIZER PROBLEM SEED COMMENT REFERENCE C 4010 Channel is down. Postscript file was placed into /pub/qc/qc_ps END PROBLEM RESOLUTION REPORT HRV1999:022 2000/02/28 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION A lightning strike quite nearly blasted away the signal conditioner; this has the effect of making the data for this time period look mostly like digitizer noise. For sufficiently large events, data can be seen on the vertical, but it is probably not all that useful. The signal conditioner was repaired effective 1999,137,07:04. END **************************************************************************** DATA PROBLEM REPORT DMCQC2014:0155 2014/09/25 IRIS DMC Gillian Sharer DMC X51A N4 ?HZ 2014,183,12:15:00 2014,235,18:48:00 Problem Description DEAD CHANNEL On 2014.183 12:15 UTC, N4.X51A.?HZ suffered a sudden catastrophic failure and stopped recording any seismic energy. END PROBLEM RESOLUTION REPORT DMCQC2014:0155 2014/09/25 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The sensor was replaced on 2014.235 18:48 UTC and normal operation resumed. END **************************************************************************** DATA PROBLEM REPORT ASL2006:088 2006/03/23 ASL DCC Valerie Peyton ASL INCN IU 00/*HZ 2006,082,03:23:00 2006,083,12:14:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The Z component of the STS1 has fallen against one of its stops. Very large events might be visible. Beyond that, data are not useable. END **************************************************************************** DATA PROBLEM REPORT ASL1997:010 1997/01/31 ASL DCC Tyler Storm ASL KIP IU EHN EHE HHN HHE SHN SHE 1995,210,19:00:00 1997,157,19:30:00 Problem Description CHANNEL ORIENTATION There is a orientation problem with either the STS-1s, or the STS-2 instrument (or both) at KIP. A s-wave particle motion analysis reveals a difference of around twenty degrees between the two sets of data. I'll have to compile a good set of p-waves, which rise above the high background at KIP, in order to determine which data set is in error. END **************************************************************************** DATA PROBLEM REPORT DMCQC2014:0169 2014/12/18 IRIS DMC Gillian Sharer DMC W58A TA [BL]H? 2014,214,20:42:00 2014,304,01:34:00 Problem Description OTHER Beginning on 2014.214 20:42 UTC, TA.W58A had issues with sensor noise affecting the data to varying degrees on all 3 channels. The noise became severe on 2014.297 02:02 UTC and the W58A.[BL]HZ stopped recording seismic energy. END PROBLEM RESOLUTION REPORT DMCQC2014:0169 2014/12/18 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION TA.W58A resumed recording normal data after the sensor was replaced on 2014.3014 01:34 UTC. END **************************************************************************** DATA PROBLEM REPORT ASL2006:089 2006/03/23 ASL DCC Valerie Peyton ASL CHTO IU */* 2006,080,03:28:00 2006,082,14:25:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. The station operator and a contractor were on site at CHTO working on station maintenance during this time. Expect variable data quality and availability, as well as calibrations and other tests. END **************************************************************************** DATA PROBLEM REPORT DMCQC2014:0168 2014/12/18 IRIS DMC Gillian Sharer DMC W58A TA [BL]H? 2014,250,23:56:00 2014,262,20:50:00 Problem Description INVALID RESPONSE On 2014.250, TA.W58A.VM2 suddenly came up against the stops and would not respond to remote mass recenter attempts. Data during this time period is suspect. END PROBLEM RESOLUTION REPORT DMCQC2014:0168 2014/12/18 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The sensor was manually re-centered on 2014.262 20:50 UTC. END **************************************************************************** DATA PROBLEM REPORT ASL1997:012 1997/01/31 ASL DCC Tyler Storm ASL TIXI IU BHN, LHN, VHN, UHN 1996,354,00:00:00 1996,366,09:39:00 Problem Description OTHER SEED COMMENT REFERENCE C 4010 Channel is down. The mass in the N/S instrument is "pegged". The N/S data are unusable during this time frame. END PROBLEM RESOLUTION REPORT ASL1997:012 2003/05/19 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The N/S mass of the TIXI STS1 was recentered. Data quality returns to normal at 1996, 366, 09:39. END **************************************************************************** DATA PROBLEM REPORT ASL1997:011 1997/01/31 ASL DCC Tyler Storm ASL ADK IU BHZ, LHZ, VHZ, UHZ 1997,002,08:28:00 1997,003,14:39:00 Problem Description SPIKES SEED COMMENT REFERENCE C 4510 Channel has frequent spiking. The vertical broad-band data contains many very large spikes during this time frame. END PROBLEM RESOLUTION REPORT ASL1997:011 1997/01/31 ASL DCC Tyler Storm Description of Problem Resolution COMMENT The spiking problem went away at 14:39, 3 Jan 97. The reason for the disturbance is unknown. No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT ASL2006:084 2006/03/20 ASL DCC Valerie Peyton ASL RAO IU 00/* 2006,072,14:22:00 2006,072,15:55:00 Problem Description OTHER SEED COMMENT REFERENCE C 1840 Calibration data A 1000 second calibration was run on the RAO STS1 Z during this time. END **************************************************************************** DATA PROBLEM REPORT ASL2006:085 2006/03/21 ASL DCC Valerie Peyton ASL MIDW IU 00/* 2006,079,13:50:00 2006,079,23:00:00 Problem Description OTHER SEED COMMENT REFERENCE C 1840 Calibration data Calibrations were run on the MIDW STS2 instrument during this time. END **************************************************************************** DATA PROBLEM REPORT ASL2006:086 2006/03/22 ASL DCC Valerie Peyton ASL SJG IU 00/* 2006,080,14:04:00 2006,081,02:44:00 Problem Description OTHER SEED COMMENT REFERENCE C 1840 Calibration data Calibrations were run on the SJG STS1 instruments during this time. END **************************************************************************** DATA PROBLEM REPORT ASL2006:087 2006/03/22 ASL DCC Valerie Peyton ASL QSPA IU 20/* 2006,080,11:38:00 2006,083,14:11:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The QSPA STS2 masses are pegged. Very large events might be observable, but beyond that, data are not useable. END **************************************************************************** DATA PROBLEM REPORT ASL1997:018 1997/02/18 ASL DCC Tyler Storm ASL KONO IU BHZ, LHZ, VHZ, UHZ 1997,017,17:00:00 1997,021,15:33:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The vertical channels are dead during this time frame. END PROBLEM RESOLUTION REPORT ASL1997:018 2005/07/05 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The vertical channel of the STS1 at KONO was fixed. Data quality returns to normal at 1997, 021, 15:33. END **************************************************************************** DATA PROBLEM REPORT ASL1997:017 1997/02/12 ASL DCC Tyler Storm ASL SNZO IU BHZ, BHN, LHZ, LHN, VHZ, VHN, UHZ, UHN 1996,341,03:50:00 1996,343,02:00:00 Problem Description Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The data channels from the Z and N/S of the KS36000I instrument were dead during this time frame. END PROBLEM RESOLUTION REPORT ASL1997:017 2001/10/16 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The Z and N/S channels of the KS36000I instrument at SNZO were fixed near the END **************************************************************************** DATA PROBLEM REPORT ASL1997:019 1997/02/18 ASL DCC Tyler Storm ASL KONO IU BHN, LHN, VHN, UHN 1997,017,17:01:00 1997,021,15:33:00 Problem Description OTHER SEED COMMENT REFERENCE C 4625 Invalid instrument response. Data from the N/S sensor have a very large offset during this time frame. SUPPLEMENT 2005, 186 The large N mass offset appears to have caused the instrument to have completely incorrect response for all frequencies. Data are consequently not useable. END PROBLEM RESOLUTION REPORT ASL1997:019 1997/02/18 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION The N/S data are back to normal at 14:00 UTC, 21 Jan, 1997. The reason for the offset is unknown. END **************************************************************************** DATA PROBLEM REPORT NEICQC2007:116AUXMIS 2007/04/26 NEIC Individual DMC XMIS AU BH* 2007,060,00:00:00 2007,060,00:00:00 Problem Description INVALID RESPONSE gain appears to be too high, resulting in low corrected amplitudes. Refer to:http://www.iris.washington.edu/servlet/quackquery/budFileSelector.do?file=ARMA.AU..BHZ.2007.124&schema=BUD END **************************************************************************** DATA PROBLEM REPORT ASL1997:014 1997/02/11 ASL DCC Tyler Storm ASL SPA IU ?HZ 1996,361,00:00:00 1996,361,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE C 4010 Channel is down. Vertical data are unuseable. END PROBLEM RESOLUTION REPORT ASL1997:014 1997/06/04 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION The problem was resolved on 1997,060, at 02:00 UTC. END **************************************************************************** DATA PROBLEM REPORT UW1993:009 1993/03/18 University of Washington Rick Benson DMC SCP IU LHZ 1991,274,00:00:00 1991,327,00:00:00 Problem Description LOW FREQUENCY NOISE State College has high amplitude,low freq. noise which renders it useless for analysis from Sept. 28, 91 through Dec 17. Data are ok on Sept. 18 and on Dec 19, 91. END PROBLEM RESOLUTION REPORT UW1993:009 1993/04/01 ASL Tyler Storm Description of Problem Resolution During this time period, MHN and LHN (which is derived from MHN) were inop. These channels were down until 92,022. As for the noise on the other LP channels, it appeared intermittent, and I do not know what caused it. The problems continue at SCP until the station goes down on 92,241. END **************************************************************************** DATA PROBLEM REPORT ASL1997:013 1997/02/05 ASL DCC Tyler Storm ASL SNZO IU ? 1997,032,00:00:00 1997,045,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. Station is intermittently inoperative. Station maintenance was being performed. Near the end of maintenance, after the KS36000I had been repaired, calibrations were run. END PROBLEM RESOLUTION REPORT ASL1997:013 2001/10/16 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The field engineer and station operators left SNZO in operational condition on 1997,045. END **************************************************************************** DATA PROBLEM REPORT UW1993:008 1993/03/08 UW Luciana Astiz DMC CHTO IU 1992 1900,000,00:00:00 1900,000,00:00:00 Problem Description Wrong Station Coordinates in SPROUT for CHTO! There are two different station coordinates listed, CHTO should be +18.79,+98.9769,316.0 END PROBLEM RESOLUTION REPORT UW1993:008 1993/03/24 ASL Tyler Storm, ASL-BFEC Description of Problem Resolution The coordinates were changed to the correct values on 20 Feb 93. END **************************************************************************** DATA PROBLEM REPORT ASL1997:016 1997/02/11 ASL DCC Tyler Storm ASL PTGA IU ? 1996,349,23:33:00 1996,349,23:33:00 Problem Description OTHER SEED COMMENT REFERENCE S 1510 Data quality is fair. There are large pulses present in the broad-band data. END PROBLEM RESOLUTION REPORT ASL1997:016 1997/11/25 ASL DCC Tyler Storm Description of Problem Resolution COMMENT Problem was reported, and answered. See ASL1997:025 END **************************************************************************** DATA PROBLEM REPORT UW1993:007 1993/03/08 UW Luciana Astiz DMC RAR IU 1992 1900,000,00:00:00 1900,000,00:00:00 Problem Description Wrong Station Coordinates in SPROUT for RAR! There are two different station coordinates listed, RAR -21.2125, -159.7733, 28.0 is the correct one. END PROBLEM RESOLUTION REPORT UW1993:007 1993/03/24 ASL Tyler Storm, ASL-BFEC Description of Problem Resolution Unfortunately, I don't remember the date when I corrected the coordinates, but it has been done. Also, I corrected the sensor depths the first week of Mar 93: Surface - 0m Borehole - 100m END **************************************************************************** DATA PROBLEM REPORT ASL1997:015 1997/02/11 ASL DCC Tyler Storm ASL SPA IU ?HE 1997,007,01:50:00 1997,007,01:50:00 Problem Description OTHER SEED COMMENT REFERENCE C 4010 Channel is down. E/W data are unuseable. END PROBLEM RESOLUTION REPORT ASL1997:015 1997/06/05 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION The problem was resolved on 1997,024 at 19:00 UTC. END **************************************************************************** DATA PROBLEM REPORT UW1993:006 1993/01/23 University of Washington Ken Creager GOPHER ANTO IU * 1992,332,00:00:00 1994,196,00:00:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 451 Timing MAY be in error, as clock is unlocked. Events on Jan 19 and 20 of 1993, from GOPHER show P waves at ANTO arriving about 40 s early for LHZ channel. On Feb 7, 93 Feb 13, 93 and March 20, 93 the arrivals are 10-20 seconds late. This wandering timing problem continues until the last known event on March 20, 1993. Figures 19,21 of UW_92_3 and UW_92_4 quarterly reports. See Figures 93_1.2, 3, 4, 5, and 10 of the UW_93_1 quarterly report. END PROBLEM RESOLUTION REPORT UW1993:006 1993/03/24 ASL Tyler Storm, ASL-BFEC Description of Problem Resolution On 27 Nov 92 ANTO lost its lock on the clock and the timing began to drift. We were unable to get a response from the station operator during the following months. As a result, the problem was not fixed (so the timing was unreliable) until 28 Jan 93. SUPPLEMENT The timing problems at ANTO were not completely solved until the GPS receiver was replaced on 1994,196. Thus the timing at ANTO is unreliable from 1992,332 to 1994,196. For more information please also see HRV1993:055 and HRV1994:062 and their associated PRRs. END **************************************************************************** DATA PROBLEM REPORT UW1993:015 1993/03/22 University of Washington Luciana Astiz DMC ALE II VHN,VHE,VHZ 1992,005,00:00:00 1992,005,00:00:00 Problem Description TIME TEARS All VH components have several tears throughout the day, about 4, at different times. END PROBLEM RESOLUTION REPORT UW1993:015 1993/05/11 DMC Tim Ahern Description of Problem Resolution environemental variable SEEDTOLERANCE to another value. **************************************************************************** DATA PROBLEM REPORT UW1993:016 1993/03/23 University of Washington Rick Benson GOPHER DPC CZ ??? 1993,001,00:00:00 1993,124,00:00:00 Problem Description INVALID RESPONSE DPC has no response information available in the data base. END **************************************************************************** DATA PROBLEM REPORT UW1993:014 1993/03/21 University of Washington Steve Malone GOPHER NWAO IU ??? 1993,079,00:00:00 1993,079,00:00:00 Problem Description DATA DROPOUTS Gopher access to NWAO for following two events returned error code of `Time window not available' for all streams; events: 9303201452, and 9303210504 END PROBLEM RESOLUTION REPORT UW1993:014 1993/03/24 ASL Tyler Storm, ASL-BFEC Description of Problem Resolution TYPE??? System was struck by lightning on 19 Mar 93 01:30:00Z. We sent a new HRDCU out 22 Mar 93. We are going to install a new lightning detection system at NWAO this time around; hopefully this will help. You might as well take NWAO out of the auto-dial sequence until you hear from us because it will probably be a month or so. SUPPLEMENT NWAO was down from 1993, 078, 19:05 to 1993, 133, 05:29. END **************************************************************************** DATA PROBLEM REPORT UW1993:013 1993/03/19 University of Washington Rick Benson DMC GDH DW LH* MH* 1990,186,23:35:00 1992,063,18:54:00 Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE C 4503 Channel has intermittant low frequency noise. Data are fine until Sept 30, 1991. GDH is very noisy and has many outages from Oct. 1991 through Feb. 1992. Noise is very low frequence and high amplitude. Data are ok on and after April 6, 1992. See Figure UW93_019. #This looks similar to the problem with SLR and SCP which were #similarily reported. END PROBLEM RESOLUTION REPORT UW1993:013 1993/04/01 ASL Tyler Storm Description of Problem Resolution TYPE??? GDH had some amplifier problems at the end of 91. There is a data gap from 91,341 through 92,062; after the station becomes operational again, the data is good. END **************************************************************************** DATA PROBLEM REPORT UW1993:012 1993/03/18 University of Washington Rick Benson DMC SLR IU LHZ 1991,302,00:00:00 1991,326,00:00:00 Problem Description LOW FREQUENCY NOISE SLR is very noisy and unusable from Oct. 30, 91 to Nov. 22, 91. No data are available from Oct 17-28 and from Nov. 22, 91 until present. Data look fine on and before Oct. 13, 91. See Figures UW1993_020. END PROBLEM RESOLUTION REPORT UW1993:012 1993/03/30 ASL Tyler Storm Description of Problem Resolution We don't know very much about what happened at SLR; the station operators would not answer out messages. END **************************************************************************** DATA PROBLEM REPORT UW1993:011 1993/03/18 University of Washington Rick Benson DMC CHTO IU LHZ 1991,323,00:00:00 1991,330,00:00:00 Problem Description TIME TEARS CHTO has time tears in the data on on Nov. 19 and Nov. 26,1991. See Figure UW1993_020. END PROBLEM RESOLUTION REPORT UW1993:011 1993/03/25 ASL Tyler Storm, ASL-BFEC Description of Problem Resolution TYPE??? I don't think there is anything we can do about the problem at this time. It appears that the clock quality was poor during this time frame; we are assuming that this condition caused the time tears. END **************************************************************************** DATA PROBLEM REPORT UW1993:010 1993/03/18 University of Washington Rick Benson GOPHER ANTO IU LHZ 1992,347,00:00:00 1992,358,00:00:00 Problem Description INCORRECT TIME ANTO has timing problem between Dec 13, 1992 after 02:00UTC and Dec 23, 1992. On Dec. 13, its late by a minimal amount (10 secs?) and on Dec 19, its quite a bit later. (maybe ~2 mins?), and then on Dec. 23rd, its early! by 10-15 secs or so. Since it was wandering around, no attempt was made to quantify it, as it will vary with time. END PROBLEM RESOLUTION REPORT UW1993:010 1993/03/24 ASL Tyler Storm, ASL-BFEC Description of Problem Resolution TYPE??? The timing at ANTO was unreliable from 27 Nov 92 through 28 Jan 93; refer to UW1993:006 for details. END **************************************************************************** DATA PROBLEM REPORT ASL2006:080 2006/03/15 ASL DCC Valerie Peyton ASL BILL IU 00/*HZ 2006,074,01:29:00 2006,074,01:29:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The Z component of the STS1 at BILL has fallen against its stop. Data are not useable. END **************************************************************************** DATA PROBLEM REPORT DMCQC2014:0161 2014/09/25 IRIS DMC Gillian Sharer DMC N33B N4 * 2014,247,14:55:00 2014,247,15:51:00 Problem Description INVALID RESPONSE From 2014.247 14:55-15:51 UTC, N4.N33B VM2 and/or VM3 were at the stops and the station was not recording accurate ground motion. END PROBLEM RESOLUTION REPORT DMCQC2014:0161 2014/09/25 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION N4.N33B resumed recording seismic data after a successful remote mass recenter command was sent. END **************************************************************************** DATA PROBLEM REPORT ASL2006:081 2006/03/15 ASL DCC Valerie Peyton ASL TRIS IU 00/* 2006,073,13:52:00 2006,074,00:46:00 Problem Description OTHER SEED COMMENT REFERENCE C 1840 Calibration data Calibrations were run on the TRIS STS1 Z instrument during this time. END **************************************************************************** DATA PROBLEM REPORT DMCQC2014:0160 2014/08/15 IRIS DMC Gillian Sharer DMC 255A N4 ?HZ 2014,183,09:24:00 2014,186,20:13:00 Problem Description LOW FREQUENCY NOISE From 2014.183 09:24 to 2014.186 20:13 UTC, N4.255A.?HZ had excessive long period noise (>8 seconds) that was likely sensor noise rather than ground motion. END PROBLEM RESOLUTION REPORT DMCQC2014:0160 2014/08/15 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The noise resolved spontaneously. END **************************************************************************** DATA PROBLEM REPORT ASL2006:082 2006/03/15 ASL DCC Valerie Peyton ASL TRIS IU 10/* 2006,074,00:58:00 2006,074,09:50:00 Problem Description OTHER SEED COMMENT REFERENCE C 1840 Calibration data Calibrations were run on the TRIS STS2 instrument during this time. END **************************************************************************** DATA PROBLEM REPORT DMCQC2014:0163 2014/09/25 IRIS DMC Gillian Sharer DMC O61A TA * 2014,239,20:05:00 2014,241,20:17:00 Problem Description DEAD CHANNEL TA.O61A suffered a sudden digitizer failure on 2014.239 20:05 UTC and ceased to record ground motion. Counts were in the millions with a flat spectra. END PROBLEM RESOLUTION REPORT DMCQC2014:0163 2014/09/25 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The digitizer was replaced on 2014.241 20:17 UTC, and the station resumed recording normal data. END **************************************************************************** DATA PROBLEM REPORT ASL2006:083 2006/03/17 ASL DCC Valerie Peyton ASL RAR IU 10/* 2006,076,02:57:00 2006,076,13:46:00 Problem Description OTHER SEED COMMENT REFERENCE C 1825 Seismometer has non-standard orientation. Calibrations were run on the RAR CMG3-T seismometer during this time. END **************************************************************************** DATA PROBLEM REPORT DMCQC2014:0162 2014/09/25 IRIS DMC Gillian Sharer DMC B35B N4 * 2014,227,23:16:00 2014,228,19:30:00 Problem Description DEAD CHANNEL N4.B35B returned digitizer noise between 2014.227 23:16 - 2014.228 19:30 UTC, after the sensor was disconnected. END PROBLEM RESOLUTION REPORT DMCQC2014:0162 2014/09/25 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION Normal operation resumed after a new sensor was installed. END **************************************************************************** DATA PROBLEM REPORT DMCQC2014:0165 2014/12/18 IRIS DMC Gillian Sharer DMC TNA AK [BL]H? 2014,241,18:00:00 2014,279,23:40:00 Problem Description DEAD CHANNEL Data flow resumed for AK.TNA on 2014.241 after a long outage. At this time the broadband sensor was broken and not returning ground motion. The waveforms are sensor noise. END PROBLEM RESOLUTION REPORT DMCQC2014:0165 2014/12/18 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The sensor was replaced on 2014.279 23:40 UTC, and normal operation resumed. END **************************************************************************** DATA PROBLEM REPORT DMCQC2014:0164 2014/12/18 IRIS DMC Gillian Sharer DMC G59A TA * 2014,278,18:00:00 2014,339,04:00:00 Problem Description OTHER Starting in October 2014, TA.G59A has large bursts of non-seismic noise on all 3 channels that occur off and on, with counts in the millions. This vault has a history of leaking, and the noise is most likely related to corrosion. END **************************************************************************** DATA PROBLEM REPORT DMCQC2014:0167 2014/12/18 IRIS DMC Gillian Sharer DMC MLY AK [BL]H? 2014,254,23:22:00 2014,276,18:21:00 Problem Description DEAD CHANNEL A new posthole broadband sensor was installed at AK.MLY on 2014.254 but the deploy command failed due to a faulty Q330. The masses remained locked and the sensor was not recording ground motion during this time period. END PROBLEM RESOLUTION REPORT DMCQC2014:0167 2014/12/18 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION Data collection was successfully started on 2014.276 after service personnel used the STS-5A Field Software to issue the deploy command. END **************************************************************************** DATA PROBLEM REPORT DMCQC2014:0166 2014/12/18 IRIS DMC Gillian Sharer DMC MLY AK [BL]H? 2014,157,21:53:00 2014,254,17:51:00 Problem Description OTHER The broadband sensor at AK.MLY suffered a sudden failure on 2014.157 21:53 UTC and stopped recording accurate seismic data. The dc offsets were in the millions of counts and the spectra is mostly flat. The sensor was removed on 2014.254 17:51 UTC. END **************************************************************************** DATA PROBLEM REPORT ASL2006:099 2006/03/29 ASL DCC Valerie Peyton ASL KEV IU 10/* 2006,088,02:31:00 2006,088,13:21:00 Problem Description OTHER SEED COMMENT REFERENCE C 1840 Calibration data Calibrations were run on the KEV CMG3-T seismometer during this time. END **************************************************************************** DATA PROBLEM REPORT ASL1997:001 1997/01/03 ASL DCC Tyler Storm ASL SNZO IU BHN, LHN, VHN, UHN 1996,363,13:41:00 1997,006,21:00:00 Problem Description OTHER SEED COMMENT REFERENCE C 4410 Channel data quality is poor. The N/S channels have huge offsets, and P-P amplitudes. END PROBLEM RESOLUTION REPORT ASL1997:001 1997/02/12 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION The data are back to normal at 21:00 UTC, 6 Jan 1997. END **************************************************************************** DATA PROBLEM REPORT ASL1997:000 1997/01/03 ASL DCC Tyler Storm ASL SNZO IU BHZ, LHZ, VHZ, UHZ 1996,363,13:41:00 1997,006,21:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The vertical broad-band channels are dead. END PROBLEM RESOLUTION REPORT ASL1997:000 1997/02/12 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION The data are back to normal at 21:00 UTC, 6 Jan 1997. END **************************************************************************** DATA PROBLEM REPORT ASL2006:095 2006/03/28 ASL DCC Valerie Peyton ASL PET IU 00/* 2006,082,13:49:00 2006,083,02:27:00 Problem Description OTHER SEED COMMENT REFERENCE C 1840 Calibration data Calibrations were run on the PET STS1 seismometers during this time. END **************************************************************************** DATA PROBLEM REPORT ASL2006:096 2006/03/28 ASL DCC Valerie Peyton ASL PET IU 10/* 2006,083,02:27:00 2006,083,11:38:00 Problem Description OTHER SEED COMMENT REFERENCE C 1840 Calibration data Calibrations were run on the PET GS13 seismometers during this time. END **************************************************************************** DATA PROBLEM REPORT ASL2006:097 2006/03/29 ASL DCC Valerie Peyton ASL KEV IU 10/*HN 2006,088,15:09:00 2006,110,23:55:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4630 Response may be invalid. The N component of the CMG3-T at KEV has lost most of its double- ended output. The PSD shows the response of this channel is 5 - 34dB lower than it should be. Data should only be used with great caution as the instrument response cannot be trusted. SUPPLEMENT 2006, 089 The response problem on the KEV CMG3-T has proved to be intermittant. At times the response is correct and data are reliable. The rest of the time, data should likely not be used. END **************************************************************************** DATA PROBLEM REPORT ASL2006:098 2006/03/29 ASL DCC Valerie Peyton ASL KEV IU 00/* 2006,087,13:54:00 2006,088,02:35:00 Problem Description OTHER SEED COMMENT REFERENCE C 1840 Calibration data Calibrations were run on the KEV STS1 instruments during this time. END **************************************************************************** DATA PROBLEM REPORT ASL1997:007 1997/01/24 ASL DCC Tyler Storm ASL MAKZ IU SHZ, SHN, SHE, HHZ, HHN, HHE 1996,316,00:00:00 1997,309,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE C 4010 Channel is down. Data from the STS-2 instrument is unusable. END PROBLEM RESOLUTION REPORT ASL1997:007 2000/09/11 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The STS-2 instrument at MAKZ came back online with good data on 1997,309. END **************************************************************************** DATA PROBLEM REPORT ASL1997:006 1997/01/13 ASL DCC Tyler Storm ASL PMG IU *H* 00/*H* 10/*H* 1993,253,00:00:00 1993,253,00:00:00 Problem Description NOISE SEED COMMENT REFERENCE C 4503 Channel has intermittant low frequency noise. There are pulses in the PMG data. Although the disturbance can be seen on all components, the amplitude of the pulses is much larger in the N/S data. END PROBLEM RESOLUTION REPORT ASL1997:006 2003/06/23 ASL DCC Valerie Peyton Description of Problem Resolution COMMENT The pulsing in the PMG data continues to predominantly be observed on the N components of the instruments. The pulsing comes and goes, the periodicity and amplitude are highly variable, and the source is unknown. However, we believe that the pulsing is simply part of the background noise of the station (for more information on the noisiness of the location, please see HRV1994:011). The pulsing is likely caused by a nearby generator or other machinery. No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT ASL1997:009 1997/01/29 ASL DCC Tyler Storm ASL SFJ IU BHZ, LHZ, VHZ, UHZ 1996,332,06:27:00 1996,333,18:12:00 Problem Description OTHER SEED COMMENT REFERENCE C 4420 Channel data quality is fair. The vertical broad-band data is degraded during this time frame. END PROBLEM RESOLUTION REPORT ASL1997:009 1997/01/29 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION It looks like the station operator was in the vault at this time. The vertical mass was very close to being pegged during this time frame, so it's quite possible the operator was working on re-centering it. The data appear to be back to normal after 18:12, 28 Nov 96. END **************************************************************************** DATA PROBLEM REPORT ASL1997:008 1997/01/28 ASL DCC Tyler Storm ASL BILL IU BHE, LHE, VHE, UHE 1996,327,19:33:00 1996,331,02:01:00 Problem Description OTHER SEED COMMENT REFERENCE C 4010 Channel is down. E/W mass is "pegged". Data is unusable. END PROBLEM RESOLUTION REPORT ASL1997:008 1997/01/28 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION The E/W mass was re-centered at 02:01, on 26 Nov 96. END **************************************************************************** DATA PROBLEM REPORT ASL1997:003 1997/01/03 ASL DCC Tyler Storm ASL MAJO IU BHZ, LHZ, VHZ, UHZ 1994,050,09:46:00 1998,082,06:29:00 Problem Description OTHER SEED COMMENT REFERENCE C 4420 Channel data quality is fair. The vertical STS-1 is not responding properly at longer periods. END PROBLEM RESOLUTION REPORT ASL1997:003 1997/05/12 ASL DCC Tyler Storm Description of Problem Resolution COMMENT I still see the long-period transients in the MAJO data. I have asked the MAJO station personnel to send me some STS-2 data, for the same time periods, so I can compare. SUPPLEMENT It appears that the long-period on transients stopped appearing in the MAJO STS1 Z data at 1998, 082, 06:29. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL1997:002 1997/01/03 ASL DCC Tyler Storm ASL KBS DW ? 1996,353,09:22:00 1996,356,01:16:00 Problem Description LOW FREQUENCY NOISE There are large pulses occurring at 353,09:22; 354,09:49; and 355,17:02 in the KBS broad-band data. On the vertical channels, I see one large pulse with a duration of around five hours at each of these times. The disturbance begins at the same time on the horizontal data but has a higher frequency and dies out within an hour in each case. END PROBLEM RESOLUTION REPORT ASL1997:002 1997/01/03 ASL DCC Tyler Storm Description of Problem Resolution COMMENT No further action will be taken at this time. END **************************************************************************** DATA PROBLEM REPORT ASL1997:005 1997/01/10 ASL DCC Tyler Storm ASL SSE IC SHE, HHE 1996,263,00:00:00 1996,263,00:00:00 Problem Description POLARITY REVERSED Channels have reversed polarity. END PROBLEM RESOLUTION REPORT ASL1997:005 1997/03/07 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION The polarity problem was fixed 02:42 UTC, 8 Jan 97. END **************************************************************************** DATA PROBLEM REPORT ASL1997:004 1997/01/06 ASL DCC Tyler Storm ASL MA2 IU ? 1996,347,00:00:00 1997,005,00:00:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 450 Time Uncertain. The timing is off by around 20 seconds. The start and end times were further refined from a residual analysis study by Professor Guy Masters (gmasters@ucsd.edu). END PROBLEM RESOLUTION REPORT ASL1997:004 2003/04/10 ASL DCC Tyler Storm Description of Problem Resolution COMMENT No further action required. END **************************************************************************** DATA PROBLEM REPORT UW1993:005 1993/01/23 University of Washington Rick Benson GOPHER SNZO IU LH? 1993,004,00:00:00 1993,071,00:00:00 Problem Description INCORRECT TIME Events on Jan 4, 15, 18, 19, and 20th of 1993, from GOPHER show P and S waves at SNZO arriving 35 to 37 s early for LHZ and LHT channels. Figures 15-17,20,21 of UW_92_3 and UW_92_4 quarterly reports. On Feb 7, 93 the P wave is about 45 seconds early, and on March 9, 93 the P and S waves are about 60 secs early. Last known incorrect time is on March 12, 93. Clock error is unstable. See Figures 93_1.1, 4, 7, 8, and 9 of the UW_93_1 quarterly report. END PROBLEM RESOLUTION REPORT UW1993:005 1993/03/24 ASL Tyler Storm, ASL-BFEC Description of Problem Resolution As close as we can estimate, SNZO lost its lock to the clock and the time began drifting around the first week of Nov 92. The rate of drift appeared to be about a half second per day until the problem was resolved on 11 Feb 93. END **************************************************************************** DATA PROBLEM REPORT UW1993:004 1993/01/23 University of Washington Ken Creager SPYDER COR IU */* 1992,365,00:00:00 1993,020,17:30:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 555 Time is 1 minute fast. Events on Jan 4, 15, 18, and 19th of 1993, from SPYDER show P and S waves at COR arriving 55 to 59 s early for LHZ and LHT channels. Figures 15-18,20 of UW_3_4_92 quarterly report. Beginning on Jan 20, 93 timing problem was fixed. END PROBLEM RESOLUTION REPORT UW1993:004 1993/03/31 ASL Tyler Storm Description of Problem Resolution TYPE??? The timing at COR was off 1 minute during this time period because the system clock was accidentally set to the wrong minute. The problem was corrected 20 Jan 93. END **************************************************************************** DATA PROBLEM REPORT UW1993:003 1993/01/23 University of Washington Ken Creager DMC KONO IU *HZ *HN 1992,071,14:03:00 1992,072,09:24:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The LHZ channel is filled with the value -3413 from 19:35 to 24:00 on March 11. It is OK on the 13th, but has not been checked for other times. END PROBLEM RESOLUTION REPORT UW1993:003 1993/03/31 ASL Tyler Storm Description of Problem Resolution TYPE??? We looked at the time section you noted; as you indicated, the channel is dead. I could not find any documented problems for that time frame, and as far as I can tell the problem has not persisted. SUPPLEMENT The KONO *HN channel was also down at this time. A system reset appears to have solved the problems on the Z and N channels. Data quality returns to normal at 1992, 072, 09:24. END **************************************************************************** DATA PROBLEM REPORT UW1993:002 1993/01/23 University of Washington Ken Creager DMC TAU IU ??? 1992,037,00:00:00 1992,073,00:00:00 Problem Description INCORRECT TIME The DMC Archive contains data for TAU from Feb 2 1992 until March 26,1992, but contains no data during all of January or during April and May. During this two month interval of operation four earthquakes larger than magnitude 6 recorded observable P waves. For each event there appears to be a different clock error that varies from -22 s to +10 s. chan phase delta event date/time mb depth clock error LHZ P 92 3/02/92 12:29:39 39 6.5 22+-2 late LHZ P 40 3/04/92 03:49:54 19 6.0 late? LHZ P 125 3/07/92 01:53:37 79 6.2 late LHZ P 99 3/13/92 16:01:45 179 6.1 ~10 s early LHZ PP,SKP 127 3/13/92 17:18:39 27 6.8 ~10 s early Figures 12-14 of UW_3_4_92 quarterly report. LOW FREQUENCY NOISE TAU was unusually noisy on 2/6/92 and 2/27/92. END PROBLEM RESOLUTION REPORT UW1993:002 1993/03/24 ASL Tyler Storm, ASL-BFEC Description of Problem Resolution TAU was in fact down at the times when the DMC does not have data for the station. The timing for TAU is unreliable most of the time; the system is old and has some problems. The data center operator more or less counts the records on a tape and figures out the time as best as possible. This is not extremely accurate; the timing almost always ends up several minutes off. This procedure is not very satisfactory, but we think that it is better than deleteing the data entirely. Although the data cannot be used for epicenter determination it could possibly be figured into magnitude calculations. This station is scheduled for upgrading. **************************************************************************** DATA PROBLEM REPORT UW1993:003 93/01/23 University of Washington Ken Creager DMC KONO IU LHZ 1992,71 1992,71 Problem Description DEAD CHANNEL The LHZ channel is filled with the value -3413 from 19:35 to 24:00 on March 11. It is OK on the 13th, but has not been checked for other times. END **************************************************************************** DATA PROBLEM REPORT UW1993:001 1993/01/23 University of Washington Ken Creager DMC PAS TS ??? 1992,013,00:00:00 1992,021,19:42:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 555 Time is 1 minute fast. There appears to be a clock error on station PAS. The clock was OK on 1/2/92, is off by one minute from 1/13/92 to 1/20/92 and is OK again after 2/2/92. The problem is detected by comparing relative arrivals of the following phases on PAS with other Terrascope stations for the following events. Phases at PAS arrived one minute earlier than they should. chan phase delta event date/time mb depth clock error LHZ P 17 1/02/92 16:40:41 6.0 10 ~0 LHZ sPP 109 1/13/92 11:58:23 6.0 113 60+-1 BHZ P 84 1/20/92 13:37:31 6.0 499 60+-.2 LHZ PP 123 2/02/92 00:31:31 6.3 10 ~0 Figures 7-11 of UW_3_4_92 quarterly report END PROBLEM RESOLUTION REPORT UW1993:001 1993/04/01 ASL Tyler Storm Description of Problem Resolution TYPE??? Yes, I agree PAS was off by approximately I minute during this time frame. We will notify the station personnel for their own records. END **************************************************************************** DATA PROBLEM REPORT ASL2006:091 2006/03/23 ASL DCC Valerie Peyton ASL KONO IU 00/* 2006,081,13:54:00 2006,082,02:35:00 Problem Description OTHER SEED COMMENT REFERENCE C 1840 Calibration data Calibrations were run on the KONO STS1 instruments during this time. END **************************************************************************** DATA PROBLEM REPORT ASL2006:092 2006/03/23 ASL DCC Valerie Peyton ASL KONO IU 10/* 2006,082,02:29:00 2006,082,13:20:00 Problem Description OTHER SEED COMMENT REFERENCE C 1840 Calibration data Calibrations were run on the KONO CMG3-T during this time. END **************************************************************************** DATA PROBLEM REPORT ASL2006:093 2006/03/28 ASL DCC Valerie Peyton ASL QSPA IU 20/* 2006,085,01:25:00 2006,087,16:16:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The QSPA STS2 masses are pegged. Very large events might be observable, but beyond that, data are not useable. The instrument will have to physically be releveled before the masses can be recentered. END **************************************************************************** DATA PROBLEM REPORT ASL2006:094 2006/03/28 ASL DCC Valerie Peyton ASL DAV IU 00/* 2006,086,13:52:00 2006,087,02:50:00 Problem Description OTHER SEED COMMENT REFERENCE C 1840 Calibration data Calibrations were run on the DAV STS1 seismometers during this time. END **************************************************************************** DATA PROBLEM REPORT ASL2006:090 2006/03/23 ASL DCC Valerie Peyton ASL CHTO IU 00/* 10/* 2006,080,08:51:00 2006,081,05:45:00 Problem Description OTHER SEED COMMENT REFERENCE C 1835 TEST DATA The 54000 and STS2 instrument inputs at CHTO are reversed during this time frame. Thus, the 00 data streams are recording the STS2 instrument, and the 10 data streams are recording the 54000 instrument. The IU/CHTO dataless reflects this odd recording configuration. END **************************************************************************** DATA PROBLEM REPORT ASL2006:066 2006/03/07 ASL DCC Valerie Peyton ASL BILL IU 10/* 2006,062,02:44:00 2006,062,11:55:00 Problem Description OTHER SEED COMMENT REFERENCE C 1840 Calibration data Calibrations were run on the BILL GS13 seismometers during this time. END PROBLEM RESOLUTION REPORT ASL2006:066 2006/03/07 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The BILL GS13 calibrations ended at 2006, 062, 11:55. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2006:067 2006/03/07 ASL DCC Valerie Peyton ASL COR IU 00/* 2006,060,14:25:00 2006,061,03:13:00 Problem Description OTHER SEED COMMENT REFERENCE C 1840 Calibration data Calibrations were run on the COR STS1 seismometers during this time. END PROBLEM RESOLUTION REPORT ASL2006:067 2006/03/07 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The COR STS1 calibrations ended at 2006, 061, 03:13. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2006:068 2006/03/07 ASL DCC Valerie Peyton ASL CTAO IU 00/* 2006,062,13:48:00 2006,063,02:30:00 Problem Description OTHER SEED COMMENT REFERENCE C 1840 Calibration data Calibrations were run on the CTAO STS1 seismometers during this time. END PROBLEM RESOLUTION REPORT ASL2006:068 2006/03/07 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The CTAO STS1 calibrations ended at 2006, 063, 02:30. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2006:069 2006/03/08 ASL DCC Valerie Peyton ASL WAKE IU 00/* 2006,065,14:06:00 2006,066,02:42:00 Problem Description OTHER SEED COMMENT REFERENCE C 1840 Calibration data Calibrations were run on the WAKE 54000 seismometer during this time. END PROBLEM RESOLUTION REPORT ASL2006:069 2006/03/08 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The WAKE 54000 calibrations ended at 2006, 066, 02:42. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2006:062 2006/03/01 ASL DCC Valerie Peyton ASL CASY IU 00/* 2006,059,14:01:00 2006,060,02:35:00 Problem Description OTHER SEED COMMENT REFERENCE C 1840 Calibration data Calibrations were run on the CASY STS1 seismometers during this time. END PROBLEM RESOLUTION REPORT ASL2006:062 2006/03/01 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The CASY STS1 calibrations ended at 2006, 060, 02:35. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2006:063 2006/03/01 ASL DCC Valerie Peyton ASL CASY IU 10/* 2006,060,02:37:00 2006,060,11:47:00 Problem Description OTHER SEED COMMENT REFERENCE C 1840 Calibration data Calibrations were run on the CASY STS2 seismometer during this time. END PROBLEM RESOLUTION REPORT ASL2006:063 2006/03/01 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The CASY STS2 calibrations ended at 2006, 060, 11:47. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2006:064 2006/03/06 ASL DCC Valerie Peyton ASL MA2 IU 00/*HE 2006,063,21:11:00 2006,065,05:19:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The E component of the STS1 at MA2 has fallen against its stop. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2006:064 2006/03/06 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The MA2 station operator recentered the STS1 E component. Data quality returns to normal at 2006, 065, 05:19. END **************************************************************************** DATA PROBLEM REPORT ASL2006:065 2006/03/07 ASL DCC Valerie Peyton ASL BILL IU 00/* 2006,061,14:05:00 2006,062,02:47:00 Problem Description OTHER SEED COMMENT REFERENCE C 1840 Calibration data Calibrations were run on the BILL STS1 seismometers during this time. END PROBLEM RESOLUTION REPORT ASL2006:065 2006/03/07 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The BILL STS1 calibrations ended at 2006, 062, 02:47. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT IDA1998:010 1998/11/05 IDA DCC Peter Davis IDA PFO II *** 1998,222,12:40:00 1998,227,22:48:00 Problem Description DATA LOGGER PROBLEM Lightning strikes on 1998,222 (Aug 10) damaged the short haul modem (COM1 external) attached to the ISP chassis and the XCOM circuit board in the DAS. These components were replaced on 1998,227, and the system returned to normal operation. END **************************************************************************** DATA PROBLEM REPORT IDA1998:011 1998/11/05 IDA DCC Peter Davis IDA JTS II BHZ,LHZ,VHZ 1998,288,21:08:00 1998,288,21:08:00 Problem Description POLARITY REVERSED The STS1-V broadband seismometer at JTS was replaced on the above date. Unfortunately, the polarity of this instrument is now reversed. There were also difficulties in setting the instrument's free period, so we will report only a nominal instrument response, which should be accurate to approximately 5%. END **************************************************************************** DATA PROBLEM REPORT IDC1995:001 1995/07/29 OTHER staqc IDC station QC TBT IU bz 1995,210,16:35:00 1995,210,16:35:00 Problem Description DATA GLITCHES The bz data at TBT has large spikes every minute. END PROBLEM RESOLUTION REPORT IDC1995:001 1995/10/19 ASL Tyler Storm Description of Problem Resolution Comment This is the same problem we have been seeing off and on for tha past couple of years. It's all related to the the corrosion problem (ref HRV1994:054). Until the current equipment is replaced, and we figure out a way to avoid this problem in the future (in this vault) we will continue to see this type of problem. No further action will be taken on this particular report. **************************************************************** DATA PROBLEM REPORT ASL1995:020 1995/08/15 ASL DCC Tyler Storm ASL SJG IU BHE,LHE,VHE,UHE 1995,225,03:26:39 1995,237,15:34:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The mass of the E/W seismometer at SJG "pegged" positive at 03:26:39 UTC on 13 Aug 95. END **************************************************************************** DATA PROBLEM REPORT IDA1998:012 1998/11/13 IDA DCC Peter Davis IDA TLY II BHZ,LHZ,VHZ 1998,243,09:00:00 1998,246,05:30:00 Problem Description DEAD CHANNEL The STS1-V broadband seismometer's mass is beyond its operating range over this period. END **************************************************************************** DATA PROBLEM REPORT UW1993:029 1993/06/30 University of Washington Rick Benson GOPHER KIP IU LHZ 1993,181,16:50:00 1993,183,01:01:00 Problem Description NOISE Station KIP has high amplitude, long period noise which renders the data useless on June 30. Problem is quite apparent for 23:47 event. END PROBLEM RESOLUTION REPORT UW1993:029 1993/08/30 ASL Tyler Storm Description of Problem Resolution COMMENT The noise described in the problem report looks more like some kind of equipment failure. The problem starts 1993, 181, 16:50 and continues through 1993, 183, 01:01. Nobody involved with the station can correlate the problem with anything they have done. If we find out any more information I will file a supplemental. SUPPLEMENT A Geoscope team was onsit at KIP for station maintenance at this time. For more information, please see HRV1993:082. END **************************************************************************** DATA PROBLEM REPORT UW1993:028 1993/07/01 University of Washington Rick Benson GOPHER TATO IU LHZ 1993,169,00:00:00 1993,169,00:00:00 Problem Description NOISE TATO has long-period noise on June 18, 1993. This is high amplitude noise which makes the data unusable for analysis. It is known that data is fine on June 12, but not known when problem starts or as yet when problem ceases. END PROBLEM RESOLUTION REPORT UW1993:028 1993/08/24 ASL Tyler Storm Description of Problem Resolution Resolution The long-period noise was caused by damage from a thunderstorm in the second week of June. A few days later the station was hit by lightning again and the seismometer has been down since that time. The last data I have seen is 21 June 93. A team in currently on site installing a new seismometer. END **************************************************************************** DATA PROBLEM REPORT ASL2003:218 2003/11/25 ASL DCC Valerie Peyton ASL RCBR IU 10/*H2 2003,328,18:54:00 2004,223,14:11:00 Problem Description NOISE SEED COMMENT REFERENCE C 4504 Channel exibits high levels of low frequency noise. The 2 component of the CMG3-T-B at RCBR is exhibiting high levels of low frequency noise. Noise levels are up to 30dB higher than they should be, beginning at 0.23Hz and continuing on down through all of the low frequencies. END PROBLEM RESOLUTION REPORT ASL2003:218 2004/08/10 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The RCBR CMG3T-B proved unretrievable: it is stuck in the borehole and cannot be removed for repair. This borehole instrument has been replaced with an STS2 in a surface vault, effective 2004, 223, 14:11. Data quality is normal for a surface STS2, and new response epochs have been added to the IU/RCBR dataless to describe the new instrument. END **************************************************************************** DATA PROBLEM REPORT UW1993:038 1993/09/29 University of Washington Luciana Astiz DMC RPN II VH? 1992,001,00:00:00 1992,366,00:00:00 Problem Description INCORRECT TIME RPN has a clock drift of up to .5 seconds per day between this dates. The sample interval is reported as 10.000 but may be it should be a bit smaller than this ! END PROBLEM RESOLUTION REPORT UW1993:038 1994/06/30 IDA Peter Davis Description of Problem Resolution RESOLUTION See UW1993:037. END **************************************************************************** DATA PROBLEM REPORT ASL2003:219 2003/12/04 ASL DCC Valerie Peyton ASL GUMO IU 00/*HE 2003,335,12:16:00 2004,316,00:45:00 Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE C 4504 Channel exibits high levels of low frequency noise. The E component of the 54000 at GUMO is displaying large amplitude low-frequency noise. From 0.05Hz down through all the low frequencies, background noise amplitudes are 15dB to 30dB higher than they should be. The cause of the problem is as yet undetermined. END PROBLEM RESOLUTION REPORT ASL2003:219 2004/11/23 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The old 54000 at GUMO was replaced with a new one, thus correcting the low- frequency noise problem on the E component. Data quality returns to normal at 2004, 316, 00:45. END **************************************************************************** DATA PROBLEM REPORT UW1993:037 1993/09/23 University of Washington Luciana Astiz DMC ERM II VH? 1992,262,00:00:00 1992,365,00:00:00 Problem Description INCORRECT TIME ERM has a clock drift of about .2 seconds per day between this dates. The sample interval is reported as 9.999 but may be it should be a bit smaller than this ! END PROBLEM RESOLUTION REPORT UW1993:037 1994/06/30 IDA Peter Davis Description of Problem Resolution RESOLUTION The problem encountered here and in UW1993:038 relate to how the sample rate reported in SEED volumes is handled. IDA data loggers compensate for clock drift by recalculating the sample rate for each data record. In cases where the clock drifts a great deal as it does at the two stations in question, the sample rate may differ in a small but significant amount from nominal. Before the Blockette 100 Sample Rate Blockette was incorporated into SEED in 1992, the way IDA reported this non-nominal sample rate was to write in the fixed section of the data header the nominal sample rate in fields 10 and 11 and a time correction in field 16. Currently, the (non-nominal) sample rate is written in Blockette 100. In either case, the information about the sample rate is faithfully preserved in SEED. IDA converted from one representation to the other during 1992. In the course of her study, Luciana Astiz used the program rdseed to convert her SEED data to SAC format. rdseed, in order to accommodate the design of SAC and to avoid undue segmentation of a time series, takes the sample rate from the first Blockette 100 as the sample rate for the entire time series, and only uses subsequent Blockette 100s to calculate if a time tear has occurred and segmentation is necessary. For pre-Blockette 100 SEED data, rdseed takes the sample rate from the fixed section of the data header. Since for pre-mid1992 IDA data, this will be the nominal rate, it is quite reasonable that Dr. Astiz calculates drifts of the amount she reports for vh* time series of a day in duration. If the time correction in the data header were used, the reported drift would be reduced to a value within tolerance. In order to solve a number of data management problems at both the IDA DCC and the DMC, the IDA DCC is in the process of retransmitting all its data to the DMC. Since all data will now be written with a Blockette 100, rdseed will write a more faithful representation of the sample rate into SAC format. END **************************************************************************** DATA PROBLEM REPORT ASL2003:216 2003/11/25 ASL DCC Valerie Peyton ASL RCBR IU 10/*HZ 2003,328,18:54:00 2004,223,14:11:00 Problem Description NOISE SEED COMMENT REFERENCE C 4504 Channel exibits high levels of low frequency noise. The Z component of the CMG3-T-B at RCBR is exhibiting high levels of low frequency noise. Noise levels are up to 40dB higher than they should be, beginning at 0.1Hz and continuing on down through all of the low frequencies. END PROBLEM RESOLUTION REPORT ASL2003:216 2004/08/10 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The RCBR CMG3T-B proved unretrievable: it is stuck in the borehole and cannot be removed for repair. This borehole instrument has been replaced with an STS2 in a surface vault, effective 2004, 223, 14:11. Data quality is normal for a surface STS2, and new response epochs have been added to the IU/RCBR dataless to describe the new instrument. END **************************************************************************** DATA PROBLEM REPORT UW1993:036 1993/09/04 University of Washington Steve Malone GOPHER PAB IU ? 1993,000,00:00:00 1993,000,00:00:00 Problem Description INCORRECT LOCATION The longitude of the stations is indicated as 4.3483 E in the SAC header; however it should be 4.3483 W (-4.3483). END PROBLEM RESOLUTION REPORT UW1993:036 1993/10/06 ASL Tyler Storm Description of Problem Resolution SUPPLEMENT The configuration files were edited at PAB (changing the location from 4.3483 E to 4.3483 W) on 6 Oct 93. The operator was instructed to reset the system at this time to make the changes effective. END **************************************************************************** DATA PROBLEM REPORT ASL2003:217 2003/11/25 ASL DCC Valerie Peyton ASL RCBR IU 10/*H1 2003,328,18:54:00 2004,223,14:11:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The 1 component of the CMG3-T-B is completely pegged during this time. Data are unuseable. END PROBLEM RESOLUTION REPORT ASL2003:217 2004/08/10 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The RCBR CMG3T-B proved unretrievable: it is stuck in the borehole and cannot be removed for repair. This borehole instrument has been replaced with an STS2 in a surface vault, effective 2004, 223, 14:11. Data quality is normal for a surface STS2, and new response epochs have been added to the IU/RCBR dataless to describe the new instrument. END **************************************************************************** DATA PROBLEM REPORT UW1993:035 1993/08/26 University of Washington Steve Malone GOPHER KIP IU BH* LH* VH* UH* 1993,225,09:24:00 1993,261,00:55:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. All channels now look dead from several GOPHER events since 1993/08/13, ?HE was dead before then. The dial-up and digitizer look OK so it would seem to be the seismometer. END PROBLEM RESOLUTION REPORT UW1993:035 1995/04/14 ASL Tyler Storm Description of Problem Resolution RESOLUTION All broad-band seismic channels from KIP were "dead" from 1993, 225, 09:24 - 1993, 261, 00:55. See Problem Resolution Report HRV1993:028 for more detail. END **************************************************************************** DATA PROBLEM REPORT UW1993:034 1993/08/24 University of Washington Ken Creager GOPHER ANTO IU BHZ 1993,193,00:00:00 1993,193,00:00:00 Problem Description INCORRECT TIME Reports UW1993:006, UW1993:010 and HRV1993:005 all indicate ongoing timing problems at ANTO. The P wave from the large event of July 12, 1993 arrives about 10 s late at ANTO suggesting the timing problem remains. See Figure 93_2.4 of the UW_93_2 quarterly report. END PROBLEM RESOLUTION REPORT UW1993:034 1993/09/24 ASL Tyler Storm Description of Problem Resolution Comment The timing at ANTO is unreliable. Refer to problem resolution report HRV1993:055. END **************************************************************************** DATA PROBLEM REPORT UW1993:033 1993/07/28 University of Washington Rick Benson DMC HIA IU LHZ 1990,213,00:00:00 1990,213,00:00:00 Problem Description DATA GLITCHES Station HIA has intermittent but high amplitude, high frequency data glitches beginning near Aug. 1, 1990. Continues through most of 1991. Good example can be seen on Aug 5, 1990 event at 17:42 UTC, in UW IRIS DMC Support quarterly report Vol. 93.2, Figure 93_2.4. END PROBLEM RESOLUTION REPORT UW1993:033 1993/09/24 ASL Tyler Storm Description of Problem Resolution Comment The station was experiencing ADC gain ranging problems at that time. Problems at HIA tend to take a long time to fix due to lack of communications and infrequent flights. END **************************************************************************** DATA PROBLEM REPORT UW1993:032 1993/07/28 University of Washington Rick Benson DMC SCP IU ??? 1990,190,00:00:00 1990,310,00:00:00 Problem Description INCORRECT TIME State College has incorrect time for time periods July 9, 1990 to Aug. 5, and from Oct 17 to Nov 6, 1990. Clock appears to be locked before and after these times, as well as in between. These time periods are approximate. This will need to be updated from station log. Clock is early by approx one minute but drifts. END PROBLEM RESOLUTION REPORT UW1993:032 1993/09/09 ASL Tyler Storm Description of Problem Resolution Comment During both of these time spans the clock drifted due to a power outage that switched the sytem to secondary power. END **************************************************************************** DATA PROBLEM REPORT UW1993:031 1993/07/28 University of Washington Rick Benson DMC SLR IU LHZ 1991,091,00:00:00 1991,158,00:00:00 Problem Description LOW FREQUENCY NOISE SLR is very noisy and unusable from April 7, 90 to June 7, 90. This is an addendum to problem report UW1993:012 where problems during 1991 are described. Data look fine for SLR after June 7 1990 until Oct. 1991. For an example, see Figure 93_2.1 in the UW IRIS DMC Support Quarterly Report Vol. 93.2. END PROBLEM RESOLUTION REPORT UW1993:031 1993/10/02 ASL Tyler Storm Description of Problem Resolution Comment We don't know what was happening at SLR at this time because the operator would not answer our messages (same situation as in UW1993:012). END **************************************************************************** DATA PROBLEM REPORT ASL2003:210 2003/11/14 ASL DCC Valerie Peyton ASL BJT IC */* 2003,318,02:08:00 2003,318,07:17:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. The BJT station operator was in the vault performing station maintenance at this time. Expect test, calibrations, and variable data quality. END PROBLEM RESOLUTION REPORT ASL2003:210 2003/11/14 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION BJT station maintenance ended at 2003, 318, 07:17. Data quality returns to normal at this time, with the exception of the N component of the STS1. To see the full span of the problem on the N component, please see ASL2003:211. END **************************************************************************** DATA PROBLEM REPORT UW1993:030 1993/07/28 University of Washington Rick Benson GOPHER PAB IU * 1993,195,00:00:00 1993,208,08:59:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 450 Time Uncertain. PAB STILL has a timing problem. This is an addendum to UW93:020 which stated that PAB had an erratic clock and was quite unreliable. Tyler Storm reports that the problem is fixed on July 14, but event on July 22, 1993 clearly shows that the clock is unlocked and about 60 seconds early. The problem, therefore, still exists. END PROBLEM RESOLUTION REPORT UW1993:030 1993/08/05 ASL Tyler Storm Description of Problem Resolution RESOLUTION I assumed that the problem was corrected because I dialed into PAB on 15 Jul and saw that the timing log had a 0.0 error for 14 Jul on. This turned out to be a bad assumption because station clock had apparently been set to the wrong minute. I checked two events for 3 Aug and the timing appeared good. Unfortunately, the station is missing the timing log for the last couple of weeks so I can't narrow down when the time was incorrectly set (probably 14 Jul 93) and when it was correctly reset. When we receive the data tape there is a good chance we can find out what happened by looking at the edit list. If this is the case I will issue a SUPPLEMENT It appears that PAB timing quality should be normal after 1993, 208, 08:59. END **************************************************************************** DATA PROBLEM REPORT ASL2003:211 2003/11/14 ASL DCC Valerie Peyton ASL BJT IC 00/*HN 2003,318,07:08:00 2003,322,04:53:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The N component of the STS1 at BJT is against one of the stops. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2003:211 2003/11/18 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The BJT station operator was able to recenter the N component of the STS1 at 2003, 322, 04:53. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2006:060 2006/02/28 ASL DCC Valerie Peyton ASL MA2 IU 10/* 2006,059,02:25:00 2006,059,11:41:00 Problem Description OTHER SEED COMMENT REFERENCE C 1840 Calibration data Calibrations were run on the MA2 GS13 seismometers during this time. END PROBLEM RESOLUTION REPORT ASL2006:060 2006/02/28 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The MA2 GS13 calibrations ended at 2006, 059, 11:41. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2006:061 2006/03/01 ASL DCC Valerie Peyton ASL HKT IU 00/*HE 2006,060,00:08:00 2006,066,16:20:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The E component of the STS1 at HKT has lost mass capture. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2006:061 2006/03/08 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The HKT station operator recentered the STS1 E component. Data quality returns to normal at 2006. 066, 16:20. END **************************************************************************** DATA PROBLEM REPORT ASL2003:214 2003/11/25 ASL DCC Valerie Peyton ASL BILL IU 00/*HE 2003,327,18:54:00 2003,330,19:55:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The E component of the STS1 at BILL is pegged. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2003:214 2003/12/01 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The BILL station operator recentered the STS1 E component. Data quality returns to normal at 2003, 330, 19:55. END **************************************************************************** DATA PROBLEM REPORT ASL2003:215 2003/11/25 ASL DCC Valerie Peyton ASL RCBR IU 10/*H* 2003,327,18:53:00 2003,328,18:54:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. All three components of the CMG3-T-B at RCBR are dead during this time period. We believe the instrument suffered a direct lightning strike, or some other high voltage anomaly. END PROBLEM RESOLUTION REPORT ASL2003:215 2003/11/25 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION Two of the three components of the CMG3-T-B at RCBR recovered from this event. The 1 component appears to be irretrievably lost; the 2 component still suffers from a fair amount of long period noise; the Z component has developed a severe noise problem. For the full time spans of the continuing problems on the various components, please see ASL2003:216 (Z), ASL2003:217 (1), and ASL2003:218 (2). END **************************************************************************** DATA PROBLEM REPORT ASL2003:212 2003/11/18 ASL DCC Valerie Peyton ASL BJT IC */* 2003,322,02:01:00 2003,322,04:53:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. The BJT station operator was in the vault performing station maintenance at this time. Expect test, calibrations, and variable data quality. END PROBLEM RESOLUTION REPORT ASL2003:212 2003/11/18 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION BJT station maintenance ended at 2003, 322, 04:53. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2003:213 2003/11/19 ASL DCC Valerie Peyton ASL BILL IU 00/*HZ 2003,323,05:30:00 2003,324,08:59:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The Z component of the STS1 at BILL has fallen against one of the stops. Large earthquakes may still be recorded, but for most practical purposes, the data are not useable. END PROBLEM RESOLUTION REPORT ASL2003:213 2003/11/20 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The BILL station operator recentered the STS1 Z. Data quality returns to normal at 2003, 324, 08:59. END **************************************************************************** DATA PROBLEM REPORT ASL2006:077 2006/03/14 ASL DCC Valerie Peyton ASL FURI IU 10/*HE 10/*HN 2006,032,07:32:00 2006,130,14:54:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The horizontal components of the CMG3-T at FURI have fallen against their stops. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2006:077 2006/07/03 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The FURI CMG3-T was recentered. Data quality returns to normal at 2006, 130, 14:54. END **************************************************************************** DATA PROBLEM REPORT IDA1998:007 1998/07/17 IDA DCC Peter Davis IDA HOPE II BHE,LHE,VHE 1998,133,00:00:00 1998,133,00:00:00 Problem Description DEAD CHANNEL The mass of the east-west STS-1H has moved beyond its normal operating range. We are working with station personnel to move it back to an equilibrium position. END PROBLEM RESOLUTION REPORT IDA1998:007 2000/06/02 IDA Peter Davis Description of Problem Resolution RESOLUTION The bbe channels came on scale at 1998,233. END **************************************************************************** DATA PROBLEM REPORT ASL2006:078 2006/03/15 ASL DCC Valerie Peyton ASL HRV IU */* 2006,073,19:08:00 2006,077,21:17:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. The station operator and an ASL representative are performing station maintenance at HRV. Expect variable data quality and availability, as well as tests, calibrations, and other disturbances. END **************************************************************************** DATA PROBLEM REPORT IDA1998:008 1998/11/05 IDA DCC Peter Davis IDA TLY II BHZ,LHZ,VHZ 1998,160,07:34:00 1998,169,11:33:00 Problem Description DEAD CHANNEL The power supply for the STS1-BBZ was damaged by a power surge. A repair was fashioned using the power supply from the NS sensor. Both BBZ and BBN are performing satisfactorily following the repair. END **************************************************************************** DATA PROBLEM REPORT ASL2006:079 2006/03/15 ASL DCC Valerie Peyton ASL PTCN IU */* 2006,065,02:26:00 2006,065,02:26:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 452 Timing IS in error, as clock is unlocked. The PTCN GPS system is not working correctly and the clock appears to be unlocked. Timing quality should be considered incorrect. END **************************************************************************** DATA PROBLEM REPORT IDA1998:005 1998/06/09 IDA DCC Peter Davis IDA COCO II BH*,LH*,VH* 1998,092,05:05:00 1998,129,07:14:00 Problem Description DATA LOGGER PROBLEM All data channels from the KS-54000 broadband seismometer were inadvertently disenabled during a tape change operation. They have been reenabled as of the above date and are again being recorded. EH* and SH* data from the STS-2 and CMG-3T were recorded throughout this period. END **************************************************************************** DATA PROBLEM REPORT IDA1998:006 1998/07/17 IDA DCC Peter Davis IDA MSEY II * 1998,125,17:12:00 1998,125,17:12:00 Problem Description DATA LOGGER PROBLEM Communications problems developed between ARS and DAS on this date. Subsequent replacement of ARS did not solve the problem. A site visit to correct the problem is scheduled for late July. END PROBLEM RESOLUTION REPORT IDA1998:006 1998/11/05 IDA Peter Davis Description of Problem Resolution RESOLUTION The ARS was replaced on 1998,161 (June 10) but communications problems were not fully resolved until 1998,185 (July 4) when the DAS and ARS were reset and resynched. END **************************************************************************** DATA PROBLEM REPORT ASL2006:073 2006/03/09 ASL DCC Valerie Peyton ASL GUMO IU 10/* 2006,068,03:00:00 2006,068,13:50:00 Problem Description OTHER SEED COMMENT REFERENCE C 1840 Calibration data Calibrations were run on the GUMO CMG3T during this time. END PROBLEM RESOLUTION REPORT ASL2006:073 2006/03/09 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The GUMO CMG3T calibrations ended at 2006, 068, 13:50. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2006:074 2006/03/10 ASL DCC Valerie Peyton ASL HRV IU *HZ 2006,069,10:59:00 2006,076,16:36:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4625 Invalid instrument response. The Z component of the STS1 at HRV has lost at least half of its double-ended output. The shape of the response curve is still correct, but the amplitude is low by ~24dB across the entire spectrum. END **************************************************************************** DATA PROBLEM REPORT ASL2006:075 2006/03/14 ASL DCC Valerie Peyton ASL KMBO IU 10/*H* 2006,069,12:39:00 2006,092,06:03:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. All three channels of the STS2 at KMBO are dead. We believe the problem is in the digitizer, not in the seismometer. END **************************************************************************** DATA PROBLEM REPORT IDA1998:009 1998/11/05 IDA DCC Peter Davis IDA ESK II *** 1998,244,02:13:00 1998,244,02:13:00 Problem Description INCORRECT TIME The GPS clock at ESK failed at 1998,244-02:13. Because the internal oscillator continues to run, it will be possible to extrapolate correct time for an indefinite period. A new clock has been shipped to the station. We will advise when it is installed. END PROBLEM RESOLUTION REPORT IDA1998:009 1999/09/16 IDA Peter Davis Description of Problem Resolution RESOLUTION The clock was corrected on a repair visit and locked up on 1998:335-15:11. END **************************************************************************** DATA PROBLEM REPORT ASL2006:076 2006/03/14 ASL DCC Valerie Peyton ASL TRQA IU 00/* 2006,068,13:53:00 2006,069,02:54:00 Problem Description OTHER SEED COMMENT REFERENCE C 1840 Calibration data Calibrations on the TRQA 54000 were run during this time. END PROBLEM RESOLUTION REPORT ASL2006:076 2006/03/14 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The TRQA 54000 calibrations ended at 2006, 069, 02:54. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT IDA1998:003 1998/04/03 IDA DCC Peter Davis IDA PFO II BHZ,LHZ,VHZ 1997,333,00:00:00 1998,090,22:00:00 Problem Description LOW FREQUENCY NOISE Vacuum containment of the PFO STS-1V was lost over a period of time beginning approximately 97,333. This loss resulted in a substantial increase in low frequency noise for that sensor. The problem was corrected by restoring vacuum on 98,090. END **************************************************************************** DATA PROBLEM REPORT IDA1998:004 1998/05/20 IDA DCC Peter Davis IDA KIV II BHE,BLE,LHE,VHE 1998,091,00:00:00 1998,091,00:00:00 Problem Description LOW FREQUENCY NOISE Saline water from the vault ceiling penetrated the seismometer connector of the STS1H EW component buffer box and caused corrosion and shorting across the buffer amplifier board. Personnel from EME are addressing the problem. END PROBLEM RESOLUTION REPORT IDA1998:004 2000/06/02 IDA Peter Davis Description of Problem Resolution RESOLUTION The problem was resolved by drying out the components and disappeared by 1998,119. There was a related problem with BBE channels from 1998,152-14:11 to 1998,159-14:57. END **************************************************************************** DATA PROBLEM REPORT UW1993:019 1993/04/02 University of Washington Rick Benson GOPHER COL IU ??? 1993,036,00:00:00 1993,132,21:00:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 545 Time is 1 minute slow. COL has a timing problem. P and S arrivals are consistently about 60 seconds early. Timing is ok on Jan. 18, 1993. The vertical component went dead on Jan 20, and we suspect the clock error was introduced when this channel was fixed. First documented timing problem is Feb 7, 93. Last documented problem is March 21, 93, but the problem may continue past this date. See Figures 93_1.3, 4, 5, 7, 9, and 10 of the UW_93_1 quarterly report. END PROBLEM RESOLUTION REPORT UW1993:019 1993/05/07 ASL Tyler Storm Description of Problem Resolution TYPE??? The clock was set to the wrong minute on 5 Feb 93 when the operator was replacing the vertical and north/south analog boards. Due to snow the operator has not been able to get back to the vault; he is scheduled to try to correct the problem 7 May 93. The timing at COL is correct again as of 12 May 93 app 21:00 Z. END **************************************************************************** DATA PROBLEM REPORT IDA1998:001 1998/02/23 IDA DCC Peter Davis IDA ASCN II *** 1998,019,08:35:00 1998,019,08:35:00 Problem Description DATA LOGGER PROBLEM Data from this date onward appear to be non-seismic. We suspect the reason for this is a power distribution problem within the data logger. The station operator has been contacted, and IDA personnel are working with him to correct the problem. END PROBLEM RESOLUTION REPORT IDA1998:001 1998/11/04 IDA Peter Davis Description of Problem Resolution COMMENT The vault power supply and amplified filter units were replaced on June 18, 1998 (1998,169) which restored the broadband channels to normal operation. However, the short period channels (SP*) remain problematic. We continue to work to trace the source of this problem. In the interim, short period data will be witheld from distribution. END **************************************************************************** DATA PROBLEM REPORT UW1993:018 1993/04/02 University of Washington Rick Benson GOPHER COL IU LHZ 1993,020,00:00:00 1993,020,00:00:00 Problem Description DEAD CHANNEL COL has a dead LHZ channel on this day. Channels LHN and LHE are ok. END PROBLEM RESOLUTION REPORT UW1993:018 1993/05/12 ASL Tyler Storm Description of Problem Resolution TYPE??? The station operators were troubleshooting a problem with the analog boards at that time. SUPPLEMENT The N channel was also down at this time. Please see HRV1993:013 for more detail and the full duration of the problem. END **************************************************************************** DATA PROBLEM REPORT IDA1998:002 1998/03/26 IDA DCC Peter Davis IDA TLY II *** 1997,335,17:06:00 1998,043,12:34:00 Problem Description DATA LOGGER PROBLEM A problem with the GPS clock and RT305 board was fixed on a maintenance visit in mid-February. At the same time, a new tape drive was installed. The station began recording data again on 98,043. END **************************************************************************** DATA PROBLEM REPORT UW1993:017 1993/04/01 University of Washington Sandy Stromme DMC PAS TS VHZ 1989,072,00:00:00 1989,072,00:00:00 Problem Description INVALID RESPONSE PAS has reported two different response fields depending upon where you look for the information. When using rdseed on a volume in ~ftp/pub/userdata called Rudolf_Widmer.1, this is what one gets: Complex zeroes: i real imag real_error imag_error 0 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 1 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 Complex poles: i real imag real_error imag_error 0 1.234000E-02 1.234000E-02 0.000000E+00 0.000000E+00 1 1.234000E-02 -1.234000E-02 0.000000E+00 0.000000E+00 2 3.918000E+01 4.912000E+01 0.000000E+00 0.000000E+00 3 3.918000E+01 -4.912000E+01 0.000000E+00 0.000000E+00 But when one goes to the database with the database set to 93, one gets: Complex zeroes: i real imag real_error imag_error 0 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 1 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 Complex poles: i real imag real_error imag_error 0 -1.234000E-02 1.234000E-02 0.000000E+00 0.000000E+00 1 -1.234000E-02 -1.234000E-02 0.000000E+00 0.000000E+00 2 -3.918000E+01 4.912000E+01 0.000000E+00 0.000000E+00 3 -3.918000E+01 -4.912000E+01 0.000000E+00 0.000000E+00 The signs on the real part of the poles are different. The effective time for the above information is stated as "11/21/88 through Present" so the response should be the same as for the Rudolph's 89 SEED volume. When I set the database to 89, I got the poles as positive as was written to the seed volume. This problem was noticed by a gopher user. If possible, I'd like to know which values are correct to let the gopher user know. END PROBLEM RESOLUTION REPORT UW1993:017 1993/06/06 DMC Tim Ahern Description of Problem Resolution TYPE??? There have been a series of response problems related to SEED volumes from ASL and at times the IRIS DBMS is not synchronized with the latest response published by ASL. The latest published version from asl shows Response type: Poles and zeroes Transfer function type: Laplace Transform (Rad/sec) Stage sequence number: 1 Response in units lookup: 6 M/S - Velocity in Meters Per Second Response out units lookup: 12 V - Volts AO normalization factor: 3950.1 Normalization frequency: 0.02 Number of zeroes: 2 Number of poles: 4 Complex zeroes: i real imag real_error imag_error 0 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 1 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 Complex poles: i real imag real_error imag_error 0 -1.234000E-02 1.234000E-02 0.000000E+00 0.000000E+00 1 -1.234000E-02 -1.234000E-02 0.000000E+00 0.000000E+00 2 -3.918000E+01 4.912000E+01 0.000000E+00 0.000000E+00 3 -3.918000E+01 -4.912000E+01 0.000000E+00 0.000000E+00 SUPPLEMENT The current version of the TS/PAS dataless appears to correctly describe all channels. Please be sure you are using the latest version of the dataless. END **************************************************************************** DATA PROBLEM REPORT ASL2003:207 2003/11/07 ASL DCC Tyler Storm ASL SAML IU 00/?H1 2003,219,04:53:00 2003,312,17:39:00 Problem Description NOISE SEED COMMENT REFERENCE C 4555 High noise levels render data only marginally useable. The H1 component of the KS54000 at SAML is exhibiting intermittent high and low frequency noise. High frequency noise levels are 2 to 12dB too high from 1Hz on up to 10Hz. Sometimes the noise problem does not begin until 0.6 Hz, but still continues on up to 10Hz. As the high frequency problem worsens, low frequency noise also begins to increase dramatically at 0.05Hz and below. END PROBLEM RESOLUTION REPORT ASL2003:207 2004/11/26 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The high and low frequency noise problems on the 1 component of the 54000 at SAML are gone as of 2003, 312, 17:39. We are not sure what solved the problem. The problem appears to have been solved at a time when there is no BH* data available to look at. The problem is present before the BH* data outage, and gone afterwards. But we're not complaining, as the problem is indeed fixed! END **************************************************************************** DATA PROBLEM REPORT UW1993:027 1993/05/02 University of Washington Ken Creager GOPHER CCM IU LH? 1993,106,00:00:00 1993,108,00:00:00 Problem Description INCORRECT TIME P and S phases are arriving 40 to 50 s late at CCM for events recorded on the 16, 17, and 18th of April 1993. The timing was fine on and before April 5, and is OK again on May 2, 1993. END PROBLEM RESOLUTION REPORT UW1993:027 1993/06/25 ASL Tyler Storm Description of Problem Resolution On 9 Apr 93 09:00Z lightning hit the receiver that provides a timing signal for CCM. The system was on internal timing until 20 Apr 93 when the problem was corrected. As a result, from 9 Apr through 20 Apr the timing could be up to a minute off. After 20 Apr the timing should be back to normal (an event on 28 Apr 93 was checked, and timing was good). END **************************************************************************** DATA PROBLEM REPORT ASL2003:208 2003/11/10 ASL DCC Valerie Peyton ASL ANMO IU 10/*HZ 2003,313,05:22:00 2003,314,17:43:00 Problem Description NOISE SEED COMMENT REFERENCE C 4625 Invalid instrument response. Noise levels on the Z component of the CMG3-T-B at ANMO are excessively high. The PSD is 2dB to 20 dB too high in the high frequencies (19Hz - 5Hz); in the mid frequencies (5Hz - 0.1Hz) it is as much as 10dB too high; then it is ~30dB too high all the way through the low frequencies (0.1Hz - 0.001Hz). END PROBLEM RESOLUTION REPORT ASL2003:208 2003/11/10 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION We were able to fix the excessive noise problem on the ANMO CMG3-T-B at 2003, 314, 17:43. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT UW1993:026 1993/04/20 University of Washington Rick Benson DMC AFI IU LHZ 1991,095,00:00:00 1991,104,00:00:00 Problem Description NOISE AFI has Noise level is approx 15s period on April 5, 1991. On april 6, there is a strange signal. On April 9, there exists a very long period (375s) signal. On April 14, station appears to be normal. See Figures UW1993_014-015. END PROBLEM RESOLUTION REPORT UW1993:026 1993/06/25 ASL Tyler Storm Description of Problem Resolution We were unable to find an explanation for the noise. No futher action will be taken. END **************************************************************************** DATA PROBLEM REPORT ASL2003:205 2003/11/06 ASL DCC Valerie Peyton ASL JOHN IU */* 2003,303,00:00:00 2003,312,00:40:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. ASL field engineers are on-site at JOHN performing station maintenance. Expect variable data quality, tests, and calibrations. From 2003, 308, 08:39 to 2003, 308, 18:06 the 00/*HZ channel is recording the north component of a CMG3-T for orientation data. The response of the surface Guralp is roughly half that of the borehole instrument. END PROBLEM RESOLUTION REPORT ASL2003:205 2003/11/10 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The ASL field engineers left JOHN in fantastic operating condition at 2003, 312, 00:40. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT UW1993:025 1993/04/20 University of Washington Rick Benson DMC TAU IU LHZ 1991,001,00:00:00 1991,094,00:00:00 Problem Description LOW FREQUENCY NOISE TAU is very noisy from January 3, 91 through February 16. Noise levels remain high through April 4, 1991, but data are usable for the larger events. See Figure UW1993_012. END PROBLEM RESOLUTION REPORT UW1993:025 1993/05/11 ASL Tyler Storm Description of Problem Resolution I see the problem you are describing, but I have not been able to do anything about it. Previous to 1991, LHZ, LHN, and LHE all had about the same noise levels, but as you know, the vertical became much worse later on. The problem was pointed out to the station some time ago, but we didn't get any response. Unfortunately, I still see this problem intermittently. We will continue to monitor the situation, and we will post an update if we make any progress. END **************************************************************************** DATA PROBLEM REPORT ASL2003:206 2003/11/06 ASL DCC Valerie Peyton ASL TEIG IU 10/BH* 2003,263,19:00:00 2004,345,18:37:00 Problem Description HIGH FREQUENCY NOISE SEED COMMENT REFERENCE C 4502 Channel has intermittant high frequency noise. All three channels of the CMG3-T-B at TEIG are exhibiting intermittant high frequency noise and spiking. The problem usually begins between 0.5 and 1Hz and continues on up through all the high frequencies. When the high frequency noise and spiking occurs, it elevates the high frequency noise floor by 15dB to 30dB. END PROBLEM RESOLUTION REPORT ASL2003:206 2004/12/22 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The TEIG CMG3-T-B was removed and replaced with an operational CMG3-T-B. Data quality returns to normal at 2004, 345, 18:37. END **************************************************************************** DATA PROBLEM REPORT UW1993:024 1993/04/20 University of Washington Rick Benson DMC KONO AS LHZ 1989,207,19:11:00 1991,157,00:00:00 Problem Description NOISE SEED COMMENT REFERENCE C 4503 Channel has intermittant low frequency noise. KONO is very noisy from Jan. 1, 1991 until Jan. 18, 1991. It is better on and after Jan 25, 1991. The noise if fairly broadband, but seems to peak at a periods of about 30 and 100 s. See Figure UW93_011. END PROBLEM RESOLUTION REPORT UW1993:024 1993/06/25 ASL Tyler Storm Description of Problem Resolution TYPE??? We looked through the station correspondence file and maintenance log, but could not find anything to explain the noise. No further action will be taken. SUPPLEMENT After 11 years of solid operation, the Geotech S-11 long-period vertical seismometer at KONO appears to have had intermittant noise problems for most of the last two years of its operation. This noise problem was finally resolved when the instrument was replaced. END **************************************************************************** DATA PROBLEM REPORT UW1993:023 1993/04/20 University of Washington Rick Benson DMC NWAO IU LHZ 1991,220,00:00:00 1991,220,00:00:00 Problem Description TIME TEARS NWAO has a combination of time tears, time gaps,and spikes for and event on Aug 8,1991. See Figure UW1993_016. END PROBLEM RESOLUTION REPORT UW1993:023 1993/06/25 ASL Tyler Storm Description of Problem Resolution Yes, all of the data problems mentioned were present at NWAO. I looked at data after 91,220 and the spiking had cleared up. We are unable to explain the gaps and time tears. Aside from verifying the problem there isn't any action to be taken. END **************************************************************************** DATA PROBLEM REPORT UW1993:022 1993/04/20 University of Washington Rick Benson DMC ANMO IU LHZ 1991,040,00:00:00 1991,040,00:00:00 Problem Description INCORRECT TIME ANMO is 60 s. early on Feb 9, 91. Time is correct on Jan 31, and on Feb 16. See Figure UW1993_013. END PROBLEM RESOLUTION REPORT UW1993:022 1993/05/11 ASL Tyler Storm Description of Problem Resolution I agree, I just analyzed an event on 9 Feb 91 that should have arrived at ANMO at02:21:14, but the P-time on the data comes out 02:20:16. Thank you for pointing out this error; we will make the appropriate comment in our data base. END **************************************************************************** DATA PROBLEM REPORT ASL2003:209 2003/11/10 ASL DCC Valerie Peyton ASL JOHN IU *L* 20/* 1998,205,00:00:00 2003,310,19:51:00 Problem Description POLARITY REVERSED SEED COMMENT REFERENCE C 4710 Channel has reversed polarity. All three channels of the FBA23 at JOHN were recording with reversed polarity during this time. END PROBLEM RESOLUTION REPORT ASL2003:209 2003/11/10 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The polarity reversals on the FBA23 at JOHN are being corrected in the dataless. To get correct polarities out, be sure to invoke the "Check Reversal" option in rdseed. The polarity reversal problem was corrected at 2003, 310, 19:51. END **************************************************************************** DATA PROBLEM REPORT UW1993:021 1993/04/20 University of Washington Rick Benson DMC SLR IU LHZ 1991,220,00:00:00 1991,220,00:00:00 Problem Description INCORRECT TIME P wave arrives 40 s late on Aug. 8, 1991, but is ok on July 14 and Aug 14. See Figures UW1993_016-017. END PROBLEM RESOLUTION REPORT UW1993:021 1993/06/24 ASL Tyler Storm Description of Problem Resolution Timing at SLR is not reliable. Neither the station log or the operators comments (this is where they would document a time correction), indicate an error. Due to the intermittent nature of this problem it is difficult to document. No further action will be taken. END **************************************************************************** DATA PROBLEM REPORT UW1993:020 1993/04/02 University of Washington Rick Benson GOPHER PAB IU * 1993,001,00:00:00 1993,195,00:00:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 451 Timing MAY be in error, as clock is unlocked. PAB has a timing problem. On Jan 13, phase SS is about 60 seconds late. On Jan 20, phase S is approx 60 seconds late. On Feb 7, it drifts to approx. 17 secs late. On Feb 18, its approx 40 seconds early. There are two events on March 9. At 01:29 SS (LHT) is 60 s late, but at 07:45 (LHZ) Pdiff at 103 degrees is clearly early by about 12-16 s. On March 20, it appears to be approx 40 secs late. See Figures 93_1.1-4, 6-8, and 10 of the UW_93_1 quarterly report. END PROBLEM RESOLUTION REPORT UW1993:020 1993/07/22 ASL Tyler Storm Description of Problem Resolution COMMENT Yes, timing is unreliable during these time frames. The clock has been locked and unlocked many times since PAB has been up. Unfortunately the timing log (with this log I could determine where the problem areas are) was lost during a software upgrade. Due to this lack of info we are forced to state that the timing for PAB has been unreliable off and on since Jan 93 through Mar 93, and again from 8 Jun 93 through 14 Jul 93. Since 14 Jul 93 the clock has been locked in and functioning correctly. END **************************************************************************** DATA PROBLEM REPORT ASL2006:070 2006/03/09 ASL DCC Valerie Peyton ASL SAML IU 00/* 2006,066,13:50:00 2006,067,02:50:00 Problem Description OTHER SEED COMMENT REFERENCE C 1840 Calibration data Calibrations were run on the SAML 54000 at this time. END PROBLEM RESOLUTION REPORT ASL2006:070 2006/03/09 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The SAML 54000 calibrations ended at 2006, 067, 02:50. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2003:200 2003/11/03 ASL DCC Valerie Peyton ASL OTAV IU 10/*HN 10/*HE 2003,305,19:03:00 2004,077,19:53:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The horizontal components of the CMG3-T at OTAV have both fallen against their stops. Data are not useable. END PROBLEM RESOLUTION REPORT ASL2003:200 2004/03/18 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION An ASL field engineer was able to recenter the OTAV CMG3-T during a field visit. Data quality returns to normal at 2004, 077, 19:53. END **************************************************************************** DATA PROBLEM REPORT ASL2006:071 2006/03/09 ASL DCC Valerie Peyton ASL SAML IU 10/* 2006,067,02:46:00 2006,067,12:11:00 Problem Description OTHER SEED COMMENT REFERENCE C 1840 Calibration data Calibrations were run on the SAML CMG3T-B seismometer at this time. END PROBLEM RESOLUTION REPORT ASL2006:071 2006/03/09 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The SAML CMG3T-B calibrations ended at 2006, 067, 12:11. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2006:072 2006/03/09 ASL DCC Valerie Peyton ASL GUMO IU 00/* 2006,067,14:03:00 2006,068,03:10:00 Problem Description OTHER SEED COMMENT REFERENCE C 1840 Calibration data Calibrations were run on the GUMO 54000 during this time. END PROBLEM RESOLUTION REPORT ASL2006:072 2006/03/09 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The GUMO 54000 calibrations ended at 2006, 068, 03:10. Data quality returns to normal at this time. END **************************************************************************** DATA PROBLEM REPORT ASL2003:203 2003/11/06 ASL DCC Valerie Peyton ASL JOHN IU 00/* 2002,266,13:36:00 2003,309,07:14:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. All three channels of the 54000 at JOHN are dead. END PROBLEM RESOLUTION REPORT ASL2003:203 2003/11/06 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The 54000 at JOHN has been removed and replaced with an operational CMG3-T-B. When the 54000 was removed from the borehole, it was found to be full of seawater. Hence the complete failure and removal of the instrument. END **************************************************************************** DATA PROBLEM REPORT ASL2003:204 2003/11/06 ASL DCC Valerie Peyton ASL KONO IU 10/*HN 10/*HE 2003,310,09:42:00 2003,323,16:54:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The N and E components of the CMG3-T at KONO are dead. We are not sure if the problem is in the instrument or in the digitizer, but data are unuseable. END PROBLEM RESOLUTION REPORT ASL2003:204 2003/11/20 ASL DCC Valerie Peyton Description of Problem Resolution RESOLUTION The KONO station operator was able to recenter the CMG3-T. Data quality returns to normal at 2003, 323, 16:54. END **************************************************************************** DATA PROBLEM REPORT ASL2003:201 2003/11/03 ASL DCC Valerie Peyton ASL MIDW IU 00/*H* 2003,305,00:19:00 2003,351,03:39:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. All three components of the 54000 at MIDW died simultaneously. We are not sure what happened (perhaps the station received a direct lightning strike), but data are currently not useable. END PROBLEM RESOLUTION REPORT ASL2003:201 2003/12/19 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION The broken KS54000 was replaced with an STS-2. END **************************************************************************** DATA PROBLEM REPORT ASL2003:202 2003/11/05 ASL DCC Tyler Storm ASL KONO IU */* 2003,309,08:30:00 2003,338,00:00:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 452 Timing IS in error, as clock is unlocked. The GPS system at KONO is unlocked from the GPS timing standard. Timing quality cannot be guaranteed. END PROBLEM RESOLUTION REPORT ASL2003:202 2003/12/10 ASL DCC Tyler Storm Description of Problem Resolution RESOLUTION Timing is good. END **************************************************************************** DATA PROBLEM REPORT DMCQC2016:0221 2016/01/26 IRIS DMC Gillian Sharer DMC HARP TA ?H? 2016,024,10:33 2016,024,17:01 Problem Description OTHER TA.HARP did not record accurate data for the 01/24/16 10:30 UTC Mw 7.1 Alaska event because one of its mass channels suddenly hit the stops at 10:33 UTC. The station resumed normal operation after a remote mass recenter at 17:01 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2016:0222 2016/01/26 IRIS DMC Gillian Sharer DMC M22K TA ?H? 2016,024,10:31 2016,024,23:09 Problem Description OTHER TA.M22K did not record accurate data for the 01/24/16 10:30 UTC Mw 7.1 Alaska event because its mass channels suddenly hit the stops at 10:31 UTC. The station resumed normal operation after a remote mass recenter at 23:09 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2016:0223 2016/01/26 IRIS DMC Gillian Sharer DMC O20K TA ?H? 2016,024,10:31 2016,024,15:19 Problem Description OTHER TA.O20K did not record accurate data for the 01/24/16 10:30 UTC Mw 7.1 Alaska event because its mass channels suddenly hit the stops at 10:31 UTC. The station resumed normal operation after a remote mass recenter at 15:19 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2016:0224 2016/01/26 IRIS DMC Gillian Sharer DMC ABTX TA * 2015,351,13:00 2016,004,18:30 Problem Description OTHER TA.ABTX masses started drifting rapidly on 2015.351 ~13:00 UTC and the station stopped responding to remote mass recenter commands. VM2 hit the stops at 2016.001 05:35 UTC, and VM2 and VM3 followed shortly after. During this time, ABTX was not recording accurate seismic data. A service visit on 2016.014 found that the vault was wet. After the vault was dried out and the sensor bench tested, the sensor was reinstalled and the station brought back on line. Normal data resumed on 2016.004 18:30 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2016:0225 2016/01/26 IRIS DMC Gillian Sharer DMC 435B TA *H* 2016,013,01:31 2016,026,17:40 Problem Description OTHER On January 13, 2016 01:31 UTC, TA.435B suffered a sudden catastrophic failure characterized by boxcar shaped noise with counts in the millions. It was not recording seismic energy for most of this time period. A service visit noted that there was corrosion evident in the sensor's electrical connector. The station resumed normal seismic recording after the sensor was replaced on January 26, 2016 17:40 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2016:0226 2016/01/26 IRIS DMC Gillian Sharer DMC 061Z N4 ?HZ 2016,020,08:00 2016,020,14:17 Problem Description INVALID RESPONSE On 2016.020 08:00 UTC, the dc offset of N4.061Z.?HZ dropped by about 2500 counts and its amplitudes were reduced by ~50%. This was likely a problem with its differential output. The channel spontaneously recovered its normal dc offset and amplitudes on 2016.020 14:17 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2016:0227 2016/01/26 IRIS DMC Gillian Sharer DMC 061Z N4 ?HZ 2016,024,18:28 Problem Description INVALID RESPONSE On 2016.024 18:28 UTC, N4.061Z.?HZ suffered a sudden drop in dc offset by ~2500 counts accompanied by amplitudes that are 50% of normal. This is likely a problem with its differential output. The channel is not recording normal amplitudes. END **************************************************************************** DATA PROBLEM REPORT DMCQC2016:0228 2016/01/26 IRIS DMC Gillian Sharer DMC 352A N4 * 2016,020,18:49 Problem Description OTHER Since 2016.020 18:49 UTC, N4.352A has suffered from high amplitude noise, possibly electrical in origin. The horizontal channels are not recording accurate seismic data and the vertical is not recording seismic data at all. END **************************************************************************** DATA PROBLEM REPORT DMCQC2016:0229 2016/02/19 IRIS DMC Gillian Sharer DMC D03D TA * 2015,227,16:30 2015,287,17:07 Problem Description INCORRECT TIME The GPS antenna was stolen from TA.D03D sometime after 2016.227 16:30 UTC. Timing is suspect until the antenna was replaced and the clock locked at 2015.287 17:07 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2016:0230 2016/02/19 IRIS DMC Gillian Sharer DMC TIGA TA ?H? 2015,298,00:00 2015,301,16:40 Problem Description OTHER On 2015.298 TIGA.VM2 came up against the stops. Then on 2015.300 23:20 UTC, the dc offsets for the seismic channels started drifting rapidly to +/-100000 counts. They were likely not recording accurate seismic energy during this time period. The station resumed normal operation on 2015.301 16:40 UTC, after a remote mass recenter. END **************************************************************************** DATA PROBLEM REPORT DMCQC2016:0231 2016/02/19 IRIS DMC Gillian Sharer DMC I49A N4 ?H? 2015,271,03:09 2015,295,17:09 Problem Description OTHER On 2015.271, N4.I49A.?HN started showing signs of corrosion related noise with sudden jumps in dc offset and/or spikes. On 2015.280, the Z channel began showing the same behavior. Finally, by 2015.291 18:00 UTC all 3 channels were significantly compromised by noise and the station stopped recording seismic energy. I49A resumed normal operation after the sensor, host box, and cables were replaced. Visible corrosion was noted in the service report. END **************************************************************************** DATA PROBLEM REPORT DMCQC2016:0232 2016/02/19 IRIS DMC Gillian Sharer DMC I49A N4 ?HZ 2016,003,03:51 2016,005,11:14 Problem Description LOW FREQUENCY NOISE On 2016.003 03:51 UTC, N4.I49A.?HZ started displaying unusual long period noise on Z, not reflecting actual ground motion. On 2016.004 13:50 UTC this noise suddenly became much larger with amplitudes in the millions and the channel was unable to record seismic energy. The noise spontaneously resolved on 2016.005 11:14 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2016:0227 2016/02/29 IRIS DMC Gillian Sharer DMC 061Z N4 ?HZ 2016,024,18:28 2016,044,15:00 Problem Description INVALID RESPONSE On 2016.024 18:28 UTC, N4.061Z.?HZ suffered a sudden drop in dc offset by ~2500 counts accompanied by amplitudes that are 50% of normal. This is likely a problem with its differential output. The channel is not recording normal amplitudes. END PROBLEM RESOLUTION REPORT DMCQC2016:0227 2016/02/29 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION N4.061Z resumed normal operation on 2016.044 15:00 UTC after the sensor, host box, and cables were replaced. END **************************************************************************** DATA PROBLEM REPORT DMCQC2016:0228 2016/02/29 IRIS DMC Gillian Sharer DMC 352A N4 ?H? 2016,020,19:49 2016,037,15:17 Problem Description OTHER Since 2016.020 18:49 UTC, N4.352A has suffered from high amplitude noise, possibly electrical in origin. The horizontal channels are not recording accurate seismic data and the vertical is not recording seismic data at all. END PROBLEM RESOLUTION REPORT DMCQC2016:0228 2016/02/29 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION N4.352A resumed recording normal ground motion after a mass recenter on 2016.037 15:17 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2016:0235 2016/02/29 IRIS DMC Gillian Sharer DMC SSN AK ?H? 2016,023,19:42 2016,034,23:32 Problem Description OTHER Sometime between 2016.023 19:42 UTC and 2016.025 04:14 UTC, the dc offsets of AK.SSN jumped into the millions of counts. The sensor may not have been recording accurate seismic data during this time. Normal dc offsets were restored on 2016.034 23:32 UTC after a mass recenter. END **************************************************************************** DATA PROBLEM REPORT DMCQC2016:0236 2016/02/29 IRIS DMC Gillian Sharer DMC G03D TA ?H? 2016,031,13:23 2016,049,22:23 Problem Description OTHER Starting on 2016.031 13:23 UTC, TA.G03D experienced high amplitude noise on Z and to a lesser extent E and N. For much of this time period, Z was not recording seismic events. TA.G03D resumed normal operation after its sensor was replaced on 2016.049 22:23 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2016:0237 2016/02/29 IRIS DMC Gillian Sharer DMC 154A N4 ?HZ 2016,033,22:07 2016,035,05:35 Problem Description INVALID RESPONSE On 2016.033 22:07 UTC, N4.154A.?HZ suffered a sudden dc offset drop of 2500 counts along with a reduction in amplitudes of ~50%. This problem resolved itself spontaneously on 2016.035 05:35 UTC with the recovery of normal dc offset and amplitudes. END **************************************************************************** DATA PROBLEM REPORT DMCQC2016:0238 2016/02/29 IRIS DMC Gillian Sharer DMC RDOG AK * 2015,142,22:30 2016,019,04:15 Problem Description INCORRECT TIME AK.RDOG's GPS antenna was damaged on 2015.142 22:30 UTC and timing is inaccurate during this time period. The antenna was fixed on 2016.019 04:15 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2016:0239 2016/02/29 IRIS DMC Gillian Sharer DMC TOLK TA --/?HE 2016,038,19:46 2016,039,21:41 Problem Description OTHER From 2016.038 19:46 UTC - 2016.039 21:41 UTC, TA.TOLK..VM3 was at the stops. TOLK..?HE was not recording accurate seismic data and its dc offset was ~700000 counts. END **************************************************************************** DATA PROBLEM REPORT DMCQC2016:0240 2016/02/29 IRIS DMC Gillian Sharer DMC U38B N4 ?H? 2016,052,20:16 0000,000,00:00 Problem Description OTHER On 2016.052 20:16 UTC, N4.U38B suffered a catastrophic failure and suddenly stopped recording ground motion. The seismic channels are returning spiky noise only. END **************************************************************************** DATA PROBLEM REPORT DMCQC2016:0241 2016/02/29 IRIS DMC Gillian Sharer DMC 121A TA ?H? 2016,053,02:39 2016,053,04:05 Problem Description OTHER From 2016.053 02:39-04:05 UTC, TA.121A abruptly stopped recording seismic energy and recorded noise instead. Recovery was spontaneous and also sudden. END **************************************************************************** DATA PROBLEM REPORT DMCQC2016:0242 2016/02/29 IRIS DMC Gillian Sharer DMC 121A TA ?H? 2016,059,06:07 2016,059,19:44 Problem Description OTHER From 2016.059 06:07-19:44 UTC, TA.121A suddenly stopped recording seismic energy in favor of noise. Dc offsets jumped to 1000000 counts. 121A resumed normal operation after the sensor to host box cable was replaced. END **************************************************************************** DATA PROBLEM REPORT DMCQC2016:0243 2016/02/29 IRIS DMC Gillian Sharer DMC I49A N4 ?HZ 2016,033,08:09 0000,000,00:00 Problem Description LOW FREQUENCY NOISE Starting on 2016.033 08:09 UTC, N4.I49A.?HZ has experienced excessive levels of long period noise. END **************************************************************************** DATA PROBLEM REPORT DMCQC2016:0244 2016/02/29 IRIS DMC Gillian Sharer DMC L61B TA ?HZ 2015,344,22:50 0000,000,00:00 Problem Description OTHER TA.L61B.?HZ started experiencing pings and long period noise on 2016.344. The noise gradually increased until 2016.041 13:47 UTC when the noise suddenly became so large that the channel was not able to record seismic energy. Amplitudes are currently on the order of 1000000 counts and the spectra is flat. END **************************************************************************** DATA PROBLEM REPORT DMCQC2016:0245 2016/08/03 IRIS DMC Gillian Sharer DMC 121A TA BHZ 2016,161,18:56 2016,180,18:30 Problem Description INVALID RESPONSE TA.121A..BHZ had amplitudes reduced by ~50% from 2016.161-2016.180 along with a DC offset drop of ~3000 counts, possibly the result of a differential output issue. Normal amplitudes were restored during a service visit by cycling the electricity to the sensor. END **************************************************************************** DATA PROBLEM REPORT DMCQC2016:0246 2016/08/03 IRIS DMC Gillian Sharer DMC Z41A TA ?HZ 2016,146,01:40 Problem Description INVALID RESPONSE On 2016.146 01:40 UTC, TA.Z41A..?HZ suffered reduced amplitudes along with a DC offset drop of ~2500 counts. Amplitudes are approximately 50% of normal. This may be a differential output issue. END **************************************************************************** DATA PROBLEM REPORT DMCQC2016:0247 2016/08/03 IRIS DMC Gillian Sharer DMC C24K TA * 2016,169,00:00 2016,173,17:00 Problem Description OTHER TA.C24K..VM2 mass channel was at the stops from installation on 2016.169 to 2016.173 17:00 UTC. As a result, the sensor was not recording accurate seismic data during this time period. The station resumed normal operation after the sensor was replaced. END **************************************************************************** DATA PROBLEM REPORT DMCQC2016:0248 2016/08/03 IRIS DMC Gillian Sharer DMC C36M TA ?H? 2016,320,12:00 2016,363,23:25 Problem Description OTHER TA.C36M..VM1 hit the stops around 2015.320 12:00 UTC and VM2 hit the stops shortly after. While the masses were against the stops, the sensor was not recording accurate seismic data. The masses recentered on 2016.365 ~23:25 UTC, after which normal data recording resumed. END **************************************************************************** DATA PROBLEM REPORT DMCQC2016:0248 2016/08/03 IRIS DMC Gillian Sharer DMC C36M TA ?H? 2015,320,12:00 2015,363,23:25 Problem Description OTHER TA.C36M..VM1 hit the stops around 2015.320 12:00 UTC and VM2 hit the stops shortly after. While the masses were against the stops, the sensor was not recording accurate seismic data. The masses recentered on 2015.363 ~23:25 UTC, after which normal data recording resumed. END **************************************************************************** DATA PROBLEM REPORT DMCQC2016:0249 2016/08/03 IRIS DMC Gillian Sharer DMC KMSC TA ?NN 2015,318,12:00 2016,074,16:18 Problem Description OTHER The N channel of the strong motion episensor at TA.KMSC suffered from broad spectrum sensor noise from 2015.318 ~12:00 UTC to 2016.074 16:18 UTC. The problem was fixed by a sensor swap. END **************************************************************************** DATA PROBLEM REPORT DMCQC2016:0250 2016/08/03 IRIS DMC Gillian Sharer DMC 143B N4 ?H? 2016,074,17:57 2016,076,20:50 Problem Description OTHER On 2016.074 17:57 UTC the DC offsets for N4.143B..?H? started soaring into the millions of counts. The accuracy of the seismic data is highly suspect during this time. Although the mass positions were not outside of normal operating values, a mass recenter on 2016.076 fixed the issue. END **************************************************************************** DATA PROBLEM REPORT DMCQC2016:0251 2016/08/03 IRIS DMC Gillian Sharer DMC Z51A N4 * 2016,178,13:50 2016,205,13:30 Problem Description INCORRECT TIME N4.Z51A did not have a good clock lock between 2016.178 13:50 UTC and 2016.205 13:30 UTC. Timing should be considered suspect during this period. The issue was resolved by replacing the faulty GPS antenna. END **************************************************************************** DATA PROBLEM REPORT DMCQC2016:0252 2016/08/03 IRIS DMC Gillian Sharer DMC 342B N4 ?H? 2016,154,03:28 2016,203,14:50 Problem Description OTHER N4.342B..?HZ experienced spiky noise from 2016.154-2016.203, with occasional spikes on the N channel also. On 2016.192, the Z channel DC offsets dropped to negative millions of counts and it stopped recording seismic energy. The station resumed normal data recording after a service visit cleaned corrosion from the sensor cable and break box. END **************************************************************************** DATA PROBLEM REPORT DMCQC2016:0253 2016/08/03 IRIS DMC Gillian Sharer DMC G65A N4 ?H? 2016,155,13:35 2016,167,17:35 Problem Description OTHER N4.G65A experienced corrosion related noise on its Z channel starting on 2016.155 13:35 UTC. A service visit confirmed that the sensor was wet and replaced the sensor on 2016.167, resolving the noise issue. END **************************************************************************** DATA PROBLEM REPORT DMCQC2016:0244 2016/08/05 IRIS DMC Gillian Sharer DMC L61B TA ?HZ 2015,344,22:50 2016,070,18:05 Problem Description OTHER TA.L61B.?HZ started experiencing pings and long period noise on 2015.344. The noise gradually increased until 2016.041 13:47 UTC when it suddenly became so large that the channel was not able to record seismic energy. Amplitudes were in the millions of counts and the spectra was flat. END PROBLEM RESOLUTION REPORT DMCQC2016:0244 2016/08/05 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION L61B resumed normal data recording after a service visit replaced the sensor on March 10, 2016. END **************************************************************************** DATA PROBLEM REPORT DMCQC2016:0243 2016/08/05 IRIS DMC Gillian Sharer DMC I49A N4 ?HZ 2016,033,08:09 2016,108,17:00 Problem Description LOW FREQUENCY NOISE Starting on 2016.033 08:09 UTC, N4.I49A.?HZ has experienced excessive levels of long period noise. END PROBLEM RESOLUTION REPORT DMCQC2016:0243 2016/08/05 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The problem resolved itself on 2016.108 ~17:00 UTC. Noise levels returned to normal. END **************************************************************************** DATA PROBLEM REPORT DMCQC2016:0240 2016/08/05 IRIS DMC Gillian Sharer DMC U38B N4 ?H? 2016,052,20:16 2016,160,16:35 Problem Description DEAD CHANNEL On 2016.052 20:16 UTC, N4.U38B suffered a catastrophic failure and suddenly stopped recording ground motion. The seismic channels returned spiky and/or digitizer noise only. END PROBLEM RESOLUTION REPORT DMCQC2016:0240 2016/08/05 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION A site visit on June 5-8, 2016 noted that there was water in the vault and corrosion of the electronics. The station started recording normal seismic data again after sensor, host box, and cable swaps. END **************************************************************************** DATA PROBLEM REPORT DMCQC2016:0254 2016/08/08 IRIS DMC Gillian Sharer DMC 441B N4 ?HZ 2016,101,20:00 2016,202,17:42 Problem Description INVALID RESPONSE On 2016.101 ~20:00 UTC, N4.441B.?HZ experienced a drop in amplitudes by ~50% along with a change in DC offset of ~3000 counts. This may be a differential output issue. The station resumed normal data recording on 2016.202 after the sensor and host box were replaced. END **************************************************************************** DATA PROBLEM REPORT DMCQC2016:0255 2016/08/08 IRIS DMC Gillian Sharer DMC D23K TA ?H? 2016,171,00:00 2016,172,21:37 Problem Description DEAD CHANNEL TA.D23K returned digitizer noise from installation until 2016.172 21:27 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2016:0256 2016/08/08 IRIS DMC Gillian Sharer DMC G22K TA ?H? 2016,169,00:00 Problem Description OTHER The TA.G22K..VM2 mass channels been at or near the stops since at least 2016.174 and most likely since installation on 2016.169. The sensor is not recording accurate seismic data. END **************************************************************************** DATA PROBLEM REPORT DMCQC2016:0257 2016/08/08 IRIS DMC Gillian Sharer DMC 154A N4 ?H? 2016,207,01:00 2016,208,23:56 Problem Description OTHER The N4.154A..VM2 mass channel hit the stops on 2016.207 01:00 UTC. Seismic channel DC offsets soared into the hundred thousands of counts and the sensor was not recording accurate seismic data. Normal operation resumed after a mass recenter at 2016.208 23:56 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2016:0258 2016/08/08 IRIS DMC Gillian Sharer DMC C23K TA ?H? 2016,172,00:00 2016,173,02:30 Problem Description DEAD CHANNEL TA.C23K returned digitizer noise from installation on 2016.172 until 2016.173 02:30 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2016:0259 2016/08/08 IRIS DMC Gillian Sharer DMC C23K TA ?H[EN] 2016,173,02:30 2016,175,15:20 Problem Description OTHER From 2016.173 02:30 UTC to 2016.175 15:20 UTC, TA.C23K had excessive noise on its horizontal channels and was not recording accurate seismic data END **************************************************************************** DATA PROBLEM REPORT DMCQC2016:0260 2016/08/08 IRIS DMC Gillian Sharer DMC S39B N4 ?H? 2016,205,06:17 Problem Description OTHER On 2016.205 06:17 UTC, N4.S39B stopped responding to mass recenters. VM3 approached the stops on 2016.206 18:29 UTC. Seismic channel DC offsets rapidly increased to the order of 500000 counts on 2016.207 ~01:30 UTC and are currently in the millions of counts. The sensor is not recording accurate seismic data. END **************************************************************************** DATA PROBLEM REPORT DMCQC2016:0261 2016/08/08 IRIS DMC Gillian Sharer DMC L27K TA ?H? 2014,206,00:00 2015,077,02:00 Problem Description OTHER A service visit to TA.L27K to establish real-time communications on 2015.077 noted that the VM3 mass channel was at the stops and recentered it. This condition could have occurred anytime from site installation on 2014.206. It will not be possible to establish a start time until the on-site disk data is retrieved. END **************************************************************************** DATA PROBLEM REPORT DMCQC2016:0262 2016/08/08 IRIS DMC Gillian Sharer DMC U32A OK ?H? 2012,193,00:00 2012,310,14:27 Problem Description OTHER The OK.U32A..VM2 mass channel began approaching the stops on 2012.193. It hit the stops on 2012.200 and soon after the seismic channel DC offsets soared into the millions of counts. The sensor was not recording accurate seismic data during this time period. The masses were recentered on 2012.310 14:27 UTC and the station resumed normal operation. END **************************************************************************** DATA PROBLEM REPORT DMCQC2016:0263 2016/08/08 IRIS DMC Gillian Sharer DMC U32A OK ?H? 2013,350,16:00 2014,134,00:00 Problem Description OTHER On 2013.350 ~16:00 UTC, OK.U32A..VM3 approached the stops after a long downward drift. By 2013.363, the seismic channel DC offsets headed towards the millions of counts. The sensor was not recording accurate seismic data during this time period. On 2014.134, VM3 spontaneously started drifting away from the stops and back towards center. END **************************************************************************** DATA PROBLEM REPORT DMCQC2016:0264 2016/08/08 IRIS DMC Gillian Sharer DMC U32A OK ?H? 2014,231,14:49 2014,243,02:00 Problem Description OTHER On 2014.231 ~14:49 UTC OK.U32A..VM2 approached the stops. Seismic channel DC offsets rapidly changed to the millions of counts. Shortly after, on 2014.236 ~20:00 UTC, VM1 also hit the stops. U32A was not recording accurate seismic data during this time period. The station resumed recording normal data after a mass recenter on 2014.243 02:00 UTC, although the mass channels continued to drift. END **************************************************************************** DATA PROBLEM REPORT DMCQC2016:0265 2016/08/08 IRIS DMC Gillian Sharer DMC U32A OK ?H? 2015,053,08:20 2015,100,21:52 Problem Description OTHER OK.U32A..VM2 hit the stops on 2015.053 08:20 UTC. It was recentered on 2015.100 21:52 UTC. During this time period, the sensor was not recording accurate seismic data. END **************************************************************************** DATA PROBLEM REPORT DMCQC2016:0266 2016/08/08 IRIS DMC Gillian Sharer DMC U32A OK ?H? 2015,144,09:59 2015,327,02:05 Problem Description OTHER On 2015.144 09:59 UTC, OK.U32A..VM2 hit the stops. VM1 hit the stops shortly after. By 2015.242, VM3 was also at the stops. The sensor was not recording accurate seismic data during this time period. In addition, the E and Z channel spent time returning flat-spectra noise only. The sensor was successfully recentered on 2015.327 02:05 UTC, but mass channels continued to drift. END **************************************************************************** DATA PROBLEM REPORT DMCQC2016:0267 2016/08/08 IRIS DMC Gillian Sharer DMC U32A OK ?H[NZ] 2016,028,14:30 2016,153,11:00 Problem Description OTHER On 2016.028 14:30 UTC, OK.U32A started experiencing spiky noise on its N and Z channels, possibly related to corrosion. This continued intermittently until 2016.153 when the sensor, host box, and cables were replaced. END **************************************************************************** DATA PROBLEM REPORT DMCQC2016:0268 2016/08/08 IRIS DMC Gillian Sharer DMC N54A TA ?HZ 2015,226,23:16 2015,230,10:18 Problem Description LOW FREQUENCY NOISE TA.N54A..?HZ had sudden onset long period sensor noise from 2015.226 12:16 UTC -2015.230 10:18 UTC, with spontaneous resolution. END **************************************************************************** DATA PROBLEM REPORT DMCQC2016:0269 2016/08/08 IRIS DMC Gillian Sharer DMC N54A TA ?HZ 2015,264,23:26 2015,294,21:47 Problem Description LOW FREQUENCY NOISE N4.N54A..?HZ experienced sudden onset long period noise intermittently from 2015.264 23:26 UTC until 2015.294 21:47 UTC when the sensor was replaced. END **************************************************************************** DATA PROBLEM REPORT DMCQC2016:0246 2017/01/27 IRIS DMC Gillian Sharer DMC Z41A TA ?HZ 2016,146,01:40 2016,223,14:00 Problem Description INVALID RESPONSE On 2016.146 01:40 UTC, TA.Z41A..?HZ suffered reduced amplitudes along with a DC offset drop of ~2500 counts. Amplitudes are approximately 50% of normal. This may be a differential output issue. END PROBLEM RESOLUTION REPORT DMCQC2016:0246 2017/01/27 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION This half-amplitude condition was resolved after a service visit to transfer the station to the Arkansas Seismic Network (network code AG). END **************************************************************************** DATA PROBLEM REPORT DMCQC2017:0270 2017/01/27 IRIS DMC Gillian Sharer DMC M65A TA * 2016,144,19:54 2016,350,02:11 Problem Description DATA LOGGER PROBLEM On 2016.144 19:54 UTC, the TA.M65A digitizer spontaneously entered into a one-second mode of operation. During this time, it was not recording frequencies below a period of 1 second. Normal data recording resumed on 2016.350 02:11 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2016:0256 2017/01/27 IRIS DMC Gillian Sharer DMC G22K TA ?H? 2016,169,00:00 2016,253,19:15 Problem Description OTHER The TA.G22K..VM2 mass channels have been at or near the stops since at least 2016.174 and most likely since installation on 2016.169. The sensor is not recording accurate seismic data. END PROBLEM RESOLUTION REPORT DMCQC2016:0256 2017/01/27 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION TA.G22K resumed normal data recording on 2016.253 ~19:15 UTC after the sensor was replaced. END **************************************************************************** DATA PROBLEM REPORT DMCQC2016:0260 2016/08/08 IRIS DMC Gillian Sharer DMC S39B N4 ?H? 2016,205,06:17 2017,021,16:15 Problem Description OTHER On 2016.205 06:17 UTC, N4.S39B stopped responding to mass recenters. VM3 approached the stops on 2016.206 18:29 UTC. Seismic channel DC offsets rapidly increased to the order of 500000 counts on 2016.207 ~01:30 UTC and are currently in the millions of counts. The sensor is not recording accurate seismic data. END PROBLEM RESOLUTION REPORT DMCQC2016:0260 2017/01/27 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION Normal data recording was restored on 2017.021 16:15 UTC, after a service visit manually re-centered the masses. END **************************************************************************** DATA PROBLEM REPORT DMCQC2017:0271 2017/01/27 IRIS DMC Gillian Sharer DMC COLD AK ?H? 2016,228,16:30 2016,245,21:30 Problem Description DEAD CHANNEL On 2016.228 16:30 UTC, AK.COLD seismic channels started returning digitizer noise. This condition lasted until 2016.245 21:30 UTC when the station started returning normal data again. END **************************************************************************** DATA PROBLEM REPORT DMCQC2017:0272 2017/01/27 IRIS DMC Gillian Sharer DMC EPYK 01 ?H? 2016,237,15:00 2016,240,03:17 Problem Description DEAD CHANNEL The second sensor for TA.EPYK at location 01 was installed on 2016.240 03:17 UTC. Data recorded prior to this time is digitizer noise. END **************************************************************************** DATA PROBLEM REPORT DMCQC2017:0273 2017/01/27 IRIS DMC Gillian Sharer DMC Y49A N4 * 2016,232,17:56 2016,242,14:54 Problem Description DATA LOGGER PROBLEM Starting on 2016.232 17:56 UTC, the digitizer at N4.Y49A began rebooting every 2 hours. This continued until the digitizer was replaced on 2016.242 14:54 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2017:0274 2017/01/30 IRIS DMC Gillian Sharer DMC ABTX TA ?H? 2016,214,06:00 2016,264,18:58 Problem Description OTHER TA.ABTX masses started drifting rapidly on 2016.214. On 2016.237, VM2 approached the stops and stayed there. VM3 followed to the stops soon after. The sensor stopped responding to automatic mass re-centers and did not record accurate data while the masses were against the stops. A service visit on 2016.264 dried out the wet bilge, re-centered the masses, and raised the sensor off the floor. Frequent mass re-centers continued for several weeks after, but the masses did not get stuck again. END **************************************************************************** DATA PROBLEM REPORT DMCQC2017:0275 2017/01/30 IRIS DMC Gillian Sharer DMC ABTX TA ?H? 2016,265,18:58 2016,267,13:22 Problem Description DATA LOGGER PROBLEM From 2016.265 18:58 UTC to 2016.267 13:22 UTC, TA.ABTX operated in one-second mode. The sensor did not record periods greater than ~1 second. It resumed recording normal data after a service visit removed the relevant wire jumper in the STS2 host box. END **************************************************************************** DATA PROBLEM REPORT DMCQC2017:0276 2017/01/30 IRIS DMC Gillian Sharer DMC M22K TA ?HZ 2016,245,06:35 2016,279,21:22 Problem Description DATA LOGGER PROBLEM On 2016.245 06:35 UTC, the DC offset of TA.M22K..?HZ suddenly dropped by 8000 counts and it's recorded amplitudes were reduced by approximately 50% of expected amplitudes. This is possibly a differential output issue and amplitude measurements are unreliable during this time period. Normal data recording was restored on 2016.279 after the Q330 datalogger was replaced. END **************************************************************************** DATA PROBLEM REPORT DMCQC2017:0277 2017/01/30 IRIS DMC Gillian Sharer DMC Y60A N4 ?HZ 2016,265,05:53 2016,280,05:25 Problem Description OTHER N4.Y60A.?HZ experienced episodes of extremely high amplitude noise, with counts upwards of 7000000, off and on between 2016.265 and 2016.280. This noise may be related to corrosion. END **************************************************************************** DATA PROBLEM REPORT DMCQC2017:0278 2017/01/30 IRIS DMC Gillian Sharer DMC 435B TA ?H? 2016,268,22:30 2016,273,20:46 Problem Description DATA DROPOUTS On 2016.268, all 3 mass channels of TA.435B suddenly dropped to -4.4V and the sensor acted as if the masses were against the stops. DC offsets of E and N soared into the millions of counts and the sensor was not recording accurate data. Remote mass recenter attempts were unsuccessful. A service visit found water in the bilge and evidence of corrosion. The station resumed normal data recording after the sensor was replaced on 2016.273. END **************************************************************************** DATA PROBLEM REPORT DMCQC2017:0279 2017/01/30 IRIS DMC Gillian Sharer DMC 143B N4 ?H? 2016,271,16:15 2016,271,20:43 Problem Description OTHER On 2016.271 16:15 UTC, the DC offsets for all 3 channels suddenly nosedived to -130000 counts over the course of several hours. Although the mass positions were not outside of normal operating values, a mass recenter on 2016.271 20:43 UTC fixed the issue. END **************************************************************************** DATA PROBLEM REPORT DMCQC2017:0280 2017/01/30 IRIS DMC Gillian Sharer DMC 143B N4 ?HN 2016,339,06:44 2016,339,20:43 Problem Description OTHER N4.143B..VM2 hit the stops on 2016.339 06:44 UTC and stayed there until the mass was re-centered on 2016.339 20:43 UTC. ?HN was not recording accurate seismic data during this time period. END **************************************************************************** DATA PROBLEM REPORT DMCQC2017:0281 2017/01/30 IRIS DMC Gillian Sharer DMC H17A TA ?H? 2016,268,05:24 2016,287,21:10 Problem Description OTHER TA.H17A began experiencing high amplitude spiky noise on N and Z on 2016.268 05:24 UTC. This lasted off and on until the sensor was replaced on 2016.287. Normal data recording resumed at ~21:10 UTC. The service visit noted water intrusion and corrosion at the break out box. END **************************************************************************** DATA PROBLEM REPORT DMCQC2017:0282 2017/01/30 IRIS DMC [Fill in your name and email] DMC Z38B N4 ?HZ 2016,270,04:00 Problem Description DATA LOGGER PROBLEM Beginning on 2016.270 04:00 UTC, Z38B.?HZ experienced a drop in DC offset of ~2500 counts accompanied by amplitudes that are roughly 50% of the expected values. This looks like a differential output problem. This is ongoing as of 2017.030. END **************************************************************************** DATA PROBLEM REPORT DMCQC2017:0283 2017/01/30 IRIS DMC Gillian Sharer DMC F36B N4 ?HN 2016,294,19:28 2016,335,13:40 Problem Description LOW FREQUENCY NOISE After a sensor swap on 2016.294 19:28 UTC, N4.F36B.?HN exhibited high levels of noise at period greater than ~50 seconds. The noise returned to normal levels after a mass recenter on 2016.335 13:40 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2017:0284 2017/01/31 IRIS DMC Gillian Sharer DMC V55A N4 ?HN 2016,293,19:28 Problem Description OTHER After a sudden large incident of noise on 2016.293 19:28 UTC with counts in the millions, N4.V55A.?HN stopped recording seismic energy. It is currently (as of 2016.031) recording mostly flat spectra noise with amplitudes ~15000-25000 counts. END **************************************************************************** DATA PROBLEM REPORT DMCQC2017:0285 2017/01/31 IRIS DMC Gillian Sharer DMC H25K TA * 2016,314,16:44 2016,315,19:09 Problem Description DEAD CHANNEL On 2016.314 16:44 UTC, TA.H25K sensor masses were locked in preparation for removal. Data after this time is either digitizer noise or unreliable. The station was removed on 2016.315 and relocated to TA.H25L. END **************************************************************************** DATA PROBLEM REPORT DMCQC2017:0286 2017/01/31 IRIS DMC Gillian Sharer DMC H25L TA ?H? 2016,315,19:09 Problem Description OTHER Since installation, TA.H25L..VM3 has been against the stops. The station is not recording accurate seismic data. END **************************************************************************** DATA PROBLEM REPORT DMCQC2017:0287 2017/01/31 IRIS DMC Gillian Sharer DMC C24K TA ?H? 2016,325,19:00 2016,328,23:24 Problem Description OTHER TA.C24K..VM3 came up against the stops on 2016.325 19:00 UTC and VM1 followed shortly after. DC offsets for the seismic channels soared into the millions of counts and the sensor was not recording accurate seismic data. The problem was fixed by a mass recenter on 2016.328 23:24 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2017:0288 2017/01/31 IRIS DMC Gillian Sharer DMC TUL1 TA ?HZ 2016,325,14:20 2016,348,20:50 Problem Description INVALID RESPONSE From 2016.325 14:20 UTC - 2016.348 20:50 UTC, TA.TUL1..?HZ exhibited symptoms of a differential output problem and alternated between normal and half-amplitude states. Amplitude measurements may not be reliable during this time frame. END **************************************************************************** DATA PROBLEM REPORT DMCQC2017:0289 2017/01/31 IRIS DMC Gillian Sharer DMC TUL1 TA ?HZ 2017,007,18:33 Problem Description INVALID RESPONSE On 2017.007 18:33 UTC, the DC offset of TA.TUL1..?HZ suddenly dropped by 10000 counts. Since then its amplitude values are ~50% of those expected. This may be a differential output problem. END **************************************************************************** DATA PROBLEM REPORT DMCQC2017:0290 2017/01/31 IRIS DMC Gillian Sharer DMC C24K TA ?H? 2016,335,20:00 2016,336,16:36 Problem Description OTHER TA.C24K..VM3 was up against the stops from 2016.335 20:00 UTC until 2016.336 16:36 UTC when a mass remote recenter was issued. During this time span, C24K was not recording accurate seismic data. END **************************************************************************** DATA PROBLEM REPORT DMCQC2017:0291 2017/01/31 IRIS DMC Gillian Sharer DMC E23K TA ?H? 2016,322,00:00 2016,336,21:26 Problem Description OTHER TA.E23K..VM1 approached the stops on 2016.322 (-3.6V). On 2016.329 23:30, the E and Z channels became noticeable affected, with DC offsets into the millions of counts. Data recorded during this time is not reliable. Normal data recording resumed after a mass recenter on 2016.336 21:26 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2017:0292 2017/01/31 IRIS DMC Gillian Sharer DMC C23K TA ?H? 2016,357,15:20 2016,361,06:28 Problem Description OTHER TA.C24K..VM3 approached the stops on 2016.357 15:20 UTC (12.7V). On 2016.359 13:14 UTC the seismic traces became noticeably affected, with dc offsets dropping to -300000-500000 counts. Data recorded during this time is not reliable. The problem was fixed with a remote mass recenter on 2016.361 06:28 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2017:0293 2017/02/02 IRIS DMC Gillian Sharer DMC EPYK TA 01/?H? 2016,365,19:00 2017,004,20:29 Problem Description OTHER On 2016.365 ~19:00 UTC, TA.EPYK..VM5 came up against the stops affecting seismic traces for the 01 location. The seismic data is not reliable during this time, and at 2017.003 18:30 UTC the dc offsets for 01.?H? moved into the hundreds of thousands of counts. The sensor resumed normal data recording after a mass recenter on 2017.004 20:29 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2017:0294 2017/02/02 IRIS DMC Gillian Sharer DMC F31M TA ?H? 2017,019,09:26 2017,023,17:34 Problem Description OTHER TA.F31M..VM3 hit the stops on 2017.019 09:26 UTC and VM2 hit the stops a short while later. The DC offsets for the seismic channels moved into the millions of counts and the data is not accurate during this time. The station resumed normal operation after a mass recenter on 2017.023 17:34 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2017:0295 2017/02/02 IRIS DMC Gillian Sharer DMC TOLK TA 01/?HE 2017,027,18:05 Problem Description DEAD CHANNEL When data transmission resumed on 2017.027 18:05 UTC after a 21 day outage, TA.TOLK..VM6 was up against the stops and TOLK.01.?HE was returning digitizer noise. This problem is ongoing as of 2017.033. END **************************************************************************** DATA PROBLEM REPORT DMCQC2017:0296 2017/02/02 IRIS DMC Gillian Sharer DMC 553A N4 ?HE 2017,029,20:28 Problem Description INVALID RESPONSE TA.553A experienced a differential output problem on 2017.029 20:28 UTC when its DC offset dropped by ~2000 counts accompanied by reduced amplitudes of ~50%. This problem is ongoing as of 2017.033. END **************************************************************************** DATA PROBLEM REPORT DMCQC2017:0297 2017/02/DD IRIS DMC Gillian Sharer DMC K29M TA ?H? 2017,019,14:46 2017,025,20:50 Problem Description DEAD CHANNEL TA.K29M seismic traces suddenly became flatlined on 2017.019 14:46 UTC and the sensor was not recording seismic energy. The station resumed normal data recording on 2017.025 20:50 UTC after a digitizer reboot. END **************************************************************************** DATA PROBLEM REPORT DMCQC2017:0298 2017/02/02 IRIS DMC Gillian Sharer DMC 121A TA ?HZ 2016,337,13:08 2016,344,17:00 Problem Description INVALID RESPONSE TA.121A..?HZ experienced a differential output problem on 2016.337 13:08 when its DC offset dropped by ~2500 counts. Amplitudes returned during this time period are approximately 50% of expected and are not accurate. The station resumed normal operation after a service visit replaced the Q330 datalogger on 2016.344 ~17:00 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2017:0299 2017/02/02 IRIS DMC Gillian Sharer DMC O44A N4 ?H? 2017,020,03:00 2017,020,15:17 Problem Description OTHER N4.O44A masses became unstable on 2017.020 ~03:00 UTC and VM2 hit the stops on 2017.020 10:54 UTC. Seismic data is not reliable during this time. The masses were re-centered on 2017.020 15:17 UTC and the station resumed normal operation. END **************************************************************************** DATA PROBLEM REPORT DMCQC2017:0300 2017/02/02 IRIS DMC Gillian Sharer DMC I49A N4 ?HZ 2016,328,12:00 Problem Description LOW FREQUENCY NOISE Since 2016.328 ~12:00 UTC, N4.I49A..?HZ has been experiencing intermittent long period noise with amplitudes in the hundred thousand counts. These episodes usually last for several hours or days before returning to normal noise levels. The vault is known to leak and water infiltration may be causing corrosion. END **************************************************************************** DATA PROBLEM REPORT DMCQC2017:0282 2017/06/12 IRIS DMC Gillian Sharer DMC Z38B N4 ?HZ 2016,270,04:00 2017,050,23:30 Problem Description DATA LOGGER PROBLEM Beginning on 2016.270 04:00 UTC, Z38B.?HZ experienced a drop in DC offset of ~2500 counts accompanied by amplitudes that are roughly 50% of the expected values. This looks like a differential output problem. END PROBLEM RESOLUTION REPORT DMCQC2017:0282 2017/06/12 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION A service visit on 2017/02/19 found corrosion on the sensor connector and cable. Full amplitude data was restored after the corrosion was cleaned. END **************************************************************************** DATA PROBLEM REPORT DMCQC2017:0284 2017/01/31 IRIS DMC Gillian Sharer DMC V55A N4 ?HN 2016,293,19:28 2017,039,23:30 Problem Description OTHER After a sudden large incident of noise on 2016.293 19:28 UTC with counts in the millions, N4.V55A.?HN stopped recording seismic energy. It is recording mostly flat spectra noise with amplitudes ~15000-25000 counts. END PROBLEM RESOLUTION REPORT DMCQC2017:0284 2017/06/06 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION V55A resumed normal data recording after the sensor and cable were replaced on 2017/02/08. END **************************************************************************** DATA PROBLEM REPORT DMCQC2017:0286 2017/01/31 IRIS DMC Gillian Sharer DMC H25L N4 ?H? 2016,315,19:09 2017,122,21:35 Problem Description OTHER Since installation, TA.H25L..VM3 has been against the stops. The station is not recording accurate seismic data. END PROBLEM RESOLUTION REPORT DMCQC2017:0286 2017/06/12 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION H25L resumed normal data recording on 2017/05/02 after the sensor was replaced. END **************************************************************************** DATA PROBLEM REPORT DMCQC2017:0303 2017/06/12 IRIS DMC Gillian Sharer DMC J56A N4 ?HE 2016,335,00:00 2017,003,19:45 Problem Description LOW FREQUENCY NOISE N4.J56A.?HE experienced elevated levels of long period noise starting around 2017.335 and greatly increasing after 2017.358. END PROBLEM RESOLUTION REPORT DMCQC2017:0303 2017/06/12 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION J56A resumed recording normal noise amplitudes following a remote sensor mass lock and unlock on January 03, 2017. END **************************************************************************** DATA PROBLEM REPORT DMCQC2017:0304 2017/06/12 IRIS DMC Gillian Sharer DMC S44A N4 ?HZ 2017,018,16:24 2017,030,07:05 Problem Description LOW FREQUENCY NOISE N4.S44A.?HZ experienced higher than normal levels of noise at periods greater than 15 seconds starting on January 18, 2017. END PROBLEM RESOLUTION REPORT DMCQC2017:0304 2017/06/12 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The problem noise was fixed by a remote sensor mass lock and unlock on January 30, 2017. END **************************************************************************** DATA PROBLEM REPORT DMCQC2017:0305 2017/06/12 IRIS DMC Gillian Sharer DMC U35K TA ?H? 2016,234,00:00 2017,062,00:00 Problem Description OTHER Due to poor comms connectivity and an automated calibration process, TA.U35K had calibrations attempted or run on an almost daily basis since installation. END PROBLEM RESOLUTION REPORT DMCQC2017:0305 2017/06/12 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The last of these unintended calibrations was run on 2017.061. The communication system was upgraded on 2017.110. END **************************************************************************** DATA PROBLEM REPORT DMCQC2017:0306 2017/06/12 IRIS DMC Gillian Sharer DMC 342B N4 ?HZ 2016,215,15:28 2016,323,15:05 Problem Description OTHER Spiky noise reappeared on N4.342B..?HZ on 2016.215 and continued off and on until the sensor was replaced on 2016.323. This noise was likely caused by corrosion. END **************************************************************************** DATA PROBLEM REPORT DMCQC2017:0295 2017/02/02 IRIS DMC Gillian Sharer DMC TOLK TA 01/?HE 2017,027,18:05 2017,035,21:31 Problem Description DEAD CHANNEL When data transmission resumed on 2017.027 18:05 UTC after a 21 day outage, TA.TOLK..VM6 was up against the stops and TOLK.01.?HE was returning digitizer noise. END PROBLEM RESOLUTION REPORT DMCQC2017:0295 2017/06/12 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION TOLK.00.?HE resumed normal data recording after a remote mass recenter on 2017/02/04 21:31 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2017:0307 2017/06/12 IRIS DMC Gillian Sharer DMC H21K TA ?H? 2017,074,21:00 2017,076,14:15 Problem Description OTHER TA.H21K..VM2 came up against the stops at around 21:00 UTC 2017/03/15. The DC offsets soared into the millions of counts and the station was not recording accurate seismic data. END PROBLEM RESOLUTION REPORT DMCQC2017:0307 2017/06/12 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION TA.H21K resumed normal data recording after a remote mass recenter at 14:15 UTC 2017/03/17. END **************************************************************************** DATA PROBLEM REPORT DMCQC2017:0308 2017/06/12 IRIS DMC Gillian Sharer DMC 146B N4 ?H? 2017,107,21:40 2017,159,17:05 Problem Description OTHER On 2017/04/17 21:40 UTC, N4.146B..VM2 became spiky and unhealthy. Shortly after, on 2017/04/21 01:15 UTC, the DC offsets of all 3 channels jumped to the millions of counts. In addition, the sensor was not responding to mass recenter commands. The sensor was swapped on 2017/05/01 21:00 UTC, but the station was still not returning accurate seismic data. After the service visit it looks like the W-element was not returning signal. END PROBLEM RESOLUTION REPORT DMCQC2017:0308 2017/06/12 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The problem was resolved after a second service visit that replaced the Q330 digitizer. Normal data recording resumed on 2017/06/08 17:05 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2017:0309 2017/06/12 IRIS DMC Gillian Sharer DMC P30M TA ?H? 2017,121,12:30 2017,121,15:00 Problem Description OTHER Data for TA.P30M clipped during the two Alaska events on 2017/05/01. E, N, and Z all clipped for the 2017/05/01 12:31:55 UTC Mww 6.2 event. Z clipped on the second event at 2017/05/01 14:18:15 MI 6.2 event. END **************************************************************************** DATA PROBLEM REPORT DMCQC2017:0310 2017/06/12 IRIS DMC Gillian Sharer DMC P29M TA ?H[EN] 2017,121,14:18 2017,121,14:19 Problem Description OTHER TA.P29M.?H[EN] data clipped on the second Alaska event on 2017/05/01, at 14:18:15 UTC with MI 6.2. END **************************************************************************** DATA PROBLEM REPORT DMCQC2017:0311 2017/06/12 IRIS DMC Gillian Sharer DMC Q44B N4 ?HZ 2017,105,12:47 Problem Description LOW FREQUENCY NOISE Starting on 2017.105, N4.Q44B..?HZ has had intermittent episodes of noise at periods > 10 seconds. Notable time periods affected are: 2017.105 12:47 UTC - 2017.118 16:40 UTC 2017.131 10:24 UTC - 2017.132 15:00 UTC 2017.137 07:57 UTC - 2017.143 05:29 UTC 2017.147 02:16 UTC - 2017.148 04:20 UTC 2017.152 07:20 UTC - 2017.154 18:25 UTC END **************************************************************************** DATA PROBLEM REPORT DMCQC2017:0312 2017/06/12 IRIS DMC Gillian Sharer DMC G24K TA * 2017,149,21:18 Problem Description DEAD CHANNEL On 2017.149 21:18 UTC, TA.G24K suffered a catastrophic failure (possibly a bear) and started returning digitizer noise and spikes. It is not recording seismic energy. END **************************************************************************** DATA PROBLEM REPORT DMCQC2017:0313 2017/06/12 IRIS DMC Gillian Sharer DMC T60A N4 ?HZ 2017,154,22:06 2017,158,23:05 Problem Description LOW FREQUENCY NOISE N4.T60A..?HZ experienced a sudden onset of noise at periods > 10 seconds on 2017/06/03 22:06 UTC. END PROBLEM RESOLUTION REPORT DMCQC2017:0313 2017/06/12 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The noise was resolved after a remote sensor mass lock and unlock was performed at 2017/06/07 23:05 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2017:0296 2017/02/02 IRIS DMC Gillian Sharer DMC 553A N4 ?HE 2017,029,20:28 2017,054,20:22 Problem Description INVALID RESPONS TA.553A experienced a differential output problem on 2017.029 20:28 UTC when its DC offset dropped by ~2000 counts accompanied by reduced amplitudes of ~50%. END PROBLEM RESOLUTION REPORT DMCQC2017:0296 2017/06/12 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION A service visit on 2017/02/23 fixed the problem by replacing the host box and cleaning corrosion from connectors. Normal amplitudes resumed at ~20:22 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2017:0289 2017/01/31 IRIS DMC Gillian Sharer DMC TUL1 TA ?HZ 2017,007,18:33 2017,049,15:26 Problem Description INVALID RESPONSE On 2017.007 18:33 UTC, the DC offset of TA.TUL1..?HZ suddenly dropped by 10000 counts. Since then its amplitude values are ~50% of those expected. This may be a differential output problem. END PROBLEM RESOLUTION REPORT DMCQC2017:0289 2017/06/12 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION Normal amplitudes were restored on 2017/02/23 15:26 UTC after a service visit that cleaned corrosion off the cable connectors. END **************************************************************************** DATA PROBLEM REPORT DMCQC2017:0312 2017/10/19 IRIS DMC Gillian Sharer DMC G24K TA * 2017,149,21:18 2017,170,20:10 Problem Description DEAD CHANNEL On 2017.149 21:18 UTC, TA.G24K suffered a catastrophic failure (possibly a bear) and started returning digitizer noise and spikes. It is not recording seismic energy. END PROBLEM RESOLUTION REPORT DMCQC2017:0312 2017/10/19 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION G24K resumed normal data recording after a service visit on 06/19/2017 replaced a damaged cable. It had been chewed by a bear. END **************************************************************************** DATA PROBLEM REPORT DMCQC2017:0311 2017/10/19 IRIS DMC Gillian Sharer DMC Q44B N4 ?HZ 2017,105,12:47 2017,154,18:25 Problem Description LOW FREQUENCY NOISE Starting on 2017.105, N4.Q44B..?HZ has had intermittent episodes of noise at periods > 10 seconds. Notable time periods affected are: 2017.105 12:47 UTC - 2017.118 16:40 UTC 2017.131 10:24 UTC - 2017.132 15:00 UTC 2017.137 07:57 UTC - 2017.143 05:29 UTC 2017.147 02:16 UTC - 2017.148 04:20 UTC 2017.152 07:20 UTC - 2017.154 18:25 UTC END PROBLEM RESOLUTION REPORT DMCQC2017:0311 2017/10/19 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION As of 10/19/2017, this noise was last seen on Q44B on 2017.154. END **************************************************************************** DATA PROBLEM REPORT DMCQC2017:0316 2017/10/19 IRIS DMC Gillian Sharer DMC Y45B N4 * 2017,151,22:00 2017,171,20:00 Problem Description OTHER Starting 2017.151, N4.Y45B began exhibiting intermittent corrosion-related noise. END PROBLEM RESOLUTION REPORT DMCQC2017:0316 2017/10/19 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION A service visit on 2017.171 found that the vault was flooded. Normal data resumed after the sensor, Q330, and cables were replaced. END **************************************************************************** DATA PROBLEM REPORT DMCQC2017:0317 2017/10/19 IRIS DMC Gillian Sharer DMC M57A N4 * 2017,186,14:40 2017,206,18:00 Problem Description OTHER From 2017.186-2017.206, N4.M57A data was dominated by sensor noise. The E channel in particular was not recording seismic energy. END PROBLEM RESOLUTION REPORT DMCQC2017:0317 2017/10/19 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION A service visit on 2017.206 found that the vault was flooded. Normal operation resumed after the vault was dried out and cleaned. Infrasound sensors were also replaced. END **************************************************************************** DATA PROBLEM REPORT DMCQC2017:0318 2017/10/19 IRIS DMC Gillian Sharer DMC TUL3 TA * 2017,204,16:00 2017,206,21:06 Problem Description OTHER TA.TUL3.01.VM6 hit the stops on 2017.204 ~16:00 UTC. DC offsets for ?H[ENZ] moved into the millions of counts and the sensor was not recording accurate seismic data. END PROBLEM RESOLUTION REPORT DMCQC2017:0318 2017/10/19 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION Normal data recording resumed after a mass recenter on 2017.206 21:06 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2017:0319 2017/10/19 IRIS DMC Gillian Sharer DMC TUL3 01 * 2017,218,06:52 2017,219,22:56 Problem Description OTHER The mass channels of TA.TUL3.01 began moving towards the stops on 2017.218 06:52 UTC. All 3 VM channels hit the stops shortly after and the sensor stopped recording accurate seismic data. DC offsets for seismic channels moved into the millions of counts. END PROBLEM RESOLUTION REPORT DMCQC2017:0319 2017/10/19 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION Normal data recording resumed after a mass recenter on 2017.219 22:56 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2017:0320 2017/10/19 IRIS DMC Gillian Sharer DMC Q54A N4 ?HN 2017,214,00:30 2017,251,04:54 Problem Description INVALID RESPONS On 2017.214 00:30 UTC, N4.Q54A.?HN amplitudes suddenly decreased by 50% accompanied by a drop in dc offset of 2500 counts. This is likely a differential output problem. END PROBLEM RESOLUTION REPORT DMCQC2017:0320 2017/10/19 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The amplitudes spontaneously recovered to normal levels coincident with the arrival of the P-wave from the 2017.251 04:49 UTC Mw 8.1 Chiapas, Mexico event. END **************************************************************************** DATA PROBLEM REPORT DMCQC2017:0321 2017/10/19 IRIS DMC Gillian Sharer DMC G15K TA * 2017,226,15:39 2017,240,20:36 Problem Description OTHER ON 2017.226 15:40 UTC, all 3 mass channels of TA.G16K suddenly approached the stops. The sensor stopped recording accurate seismic data and dc offsets for the seismic channels were in the millions of counts. END PROBLEM RESOLUTION REPORT DMCQC2017:0321 2017/10/19 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION Normal data recording resumed after a mass recenter on 2017.240 20:36 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2017:0322 2017/10/19 IRIS DMC Gillian Sharer DMC C24K TA * 2017,230,20:00 2017,240,22:26 Problem Description OTHER On 2017.230 ~20:00 UTC, TA.C24K VM1 and VM3 came up against the stops. Shortly after, the dc offsets for the seismic channels moved into the millions of counts and the sensor stopped recording accurate seismic data. END PROBLEM RESOLUTION REPORT DMCQC2017:0322 2017/10/19 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION A mass recenter was successfully sent on 2017.240 22:26 UTC and the sensor began recording normal data again. END **************************************************************************** DATA PROBLEM REPORT DMCQC2017:0323 2017/10/19 IRIS DMC Gillian Sharer DMC H43A N4 ?HE 2017,235,03:00 Problem Description LOW FREQUENCY NOISE TA.H43A.?HE began experiencing increased noise at periods > 10 seconds on 2017.235 ~03:00 UTC. This is likely sensor-related. END **************************************************************************** DATA PROBLEM REPORT DMCQC2017:0324 2017/10/19 IRIS DMC Gillian Sharer DMC C27K TA * 2017,234,16:00 2017,236,16:38 Problem Description OTHER TA.C27K..VM1 came up against the stops on 2017.234 ~16:00 UTC. On 2017.236 the dc offsets of the seismic channels moved into the millions of counts. The sensor was not recording accurate seismic data during this time END PROBLEM RESOLUTION REPORT DMCQC2017:0324 2017/10/19 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION A mass recenter was successfully sent on 2017.236 16:38 UTC and the sensor resumed normal data recording. END **************************************************************************** DATA PROBLEM REPORT DMCQC2017:0325 2017/10/19 IRIS DMC Gillian Sharer DMC G16K TA ?HE 2017,210,20:10 Problem Description INVALID RESPONSE Following a replacement of the Q330 digitizer, the amplitudes at TA.G16K..?HE are smaller than expected by ~50%. This may be a differential output problem. END **************************************************************************** DATA PROBLEM REPORT DMCQC2017:0326 2017/10/19 IRIS DMC Gillian Sharer DMC Q24A TA ?HZ 2017,259,12:06 2017,273,02:38 Problem Description INVALID RESPONSE Between 2017.259 12:06 UTC and 2017.273 02:38 UTC, TA.Q24A.?HZ had a differential output problem. Amplitudes moved between a normal state and a half-amplitude state several times, with the most notable half-amplitude durations from 2017.259 12:06-2017.261 18:24 UTC and 2017.267 07:24-2017.270 13:36 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2018:0327 2018/02/05 IRIS DMC Gillian Sharer DMC S22A TA ?HE 2017,271,11:00 2017,281,18:52 Problem Description INVALID RESPONSE From 2017.271-281, S22A.?HE experienced periods of reduced amplitudes (~50%) likely a result of a differential output problem. END PROBLEM RESOLUTION REPORT DMCQC2018:0327 2018/02/05 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The east channel regained normal amplitudes after the STS2 host box was replaced. END **************************************************************************** DATA PROBLEM REPORT DMCQC2018:0328 2018/02/05 IRIS DMC Gillian Sharer DMC S22A TA ?HN 2017,273,22:35 2017,302,20:00 Problem Description INVALID RESPONSE From 2017.273-2017.302, S22A.?HN experienced periods of reduced amplitudes (~50%), likely a result of a differential output problem. END PROBLEM RESOLUTION REPORT DMCQC2018:0328 2018/02/05 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The north channel regained normal amplitudes after the sensor, host box, and cables were removed for inspection and cleaning before being replaced. Moisture was noted in the vault. END **************************************************************************** DATA PROBLEM REPORT DMCQC2018:0329 2018/02/05 IRIS DMC Gillian Sharer DMC S22A TA ?HN 2017,341,05:25 Problem Description INVALID RESPONSE S22A.?HN began returning reduced amplitudes again on 2017.341 05:25 UTC. This half-amplitude state continues as of 2018.036. END **************************************************************************** DATA PROBLEM REPORT DMCQC2018:0330 2018/02/07 IRIS DMC Gillian Sharer DMC O44A N4 ?HE 2017,241,00:00 2017,286,20:29 Problem Description OTHER After a period of drifting, N4.O44A..VM3 approached the stops on 2017.241 (8.5V). The mass channel stayed at at 8V+ and on 2017.284 03:50 UTC the the DC offset for O44..?HE increased to the millions of counts. During this time period, the seismic data may not be reliable. The station began recording accurate data again after a mass recenter on 2017.286 20:29 UTC, which returned VM3 to normal counts. END **************************************************************************** DATA PROBLEM REPORT DMCQC2018:0331 2018/02/07 IRIS DMC Gillian Sharer DMC C24K TA ?H? 2017,297,11:15 2017,298,21:08 Problem Description OTHER TA.C24K..VM3 came up against the stops (-12.7V) on 2017.297 11:15 UTC. Shortly after, the DC offsets of its seismic channels increased into the millions of counts and the sensor stopped recording accurate seismic data. Normal operation was restored on 2017.298 21:08 UTC after a successful mass recenter. END **************************************************************************** DATA PROBLEM REPORT DMCQC2018:0332 2018/02/07 IRIS DMC Gillian Sharer DMC C24K TA ?H? 2017,350,16:23 2017,355,17:16 Problem Description DATA DROPOUTS TA.C24K..VM3 hit the stops on 2017.350 16:23 UTC. VM1 followed suit on 2017.352. C24K's seismic channels were not recording accurate data and DC offsets were in the millions of counts during this time period. Normal data recording was re-established after a successful mass recenter on 2017.355 17:16 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2018:0333 2018/02/07 IRIS DMC Gillian Sharer DMC X58A N4 * 2017,254,18:58 2017,290,20:00 Problem Description DATA LOGGER PROBLEM On 2017.254 18:58 UTC, the N4.X58A digitizer began spontaneously rebooting, with up to hundreds of reboots occurring per day. This continued until a service visit replaced the Q330 digitizer on 2017.290 ~20:00 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2018:0334 2018/03/09 IRIS DMC Gillian Sharer DMC A19K TA * 2018,012,00:00 2018,013,13:15 Problem Description OTHER A19K mass channels VM1 and VM2 came up against the stops on 2018.012. At 2018.012 20:45 UTC, the DC offsets of the N and Z channel increase suddenly into the millions of counts. The sensor was not recording accurate seismic data. END PROBLEM RESOLUTION REPORT DMCQC2018:0334 2018/03/09 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION A19K resumed normal data recording after a mass recenter on 2018.013 13:15 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2018:0335 2018/03/09 IRIS DMC Gillian Sharer DMC E21K TA * 2018,016,04:43 0000,000,00:00 Problem Description OTHER On 2018.016 04:43 UTC, TA.E21K..VM3 came up agains the stops. Dc offsets for E,N, and Z increase into the millions of counts. The sensor is not recording accurate seismic data. Ongoing. END **************************************************************************** DATA PROBLEM REPORT DMCQC2018:0336 2018/03/09 IRIS DMC Gillian Sharer DMC T25A TA * 2018,009,11:20 2018,051,00:00 Problem Description LOW FREQUENCY NOISE Beginning on 2018.009, TA.T25A.?H? began to experience sensor noise that is likely related to corrosion. This noise continued until 2018.051, when it spontaneously resolved. END **************************************************************************** DATA PROBLEM REPORT DMCQC2018:0337 2018/03/09 IRIS DMC Gillian Sharer DMC Q54A N4 ?H? 2017,363,11:45 0000,000,00:00 Problem Description LOW FREQUENCY NOISE Beginning on 2017.363, N4.Q54A.?H? began to record noise that is likely caused by corrosion. In addition, and possibly related, one or more masses were at the stops from 2018.024 00:55-2018.025 19:10 UTC and from 2018.047 20:20-2018.056 00:25 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2018:0338 2018/03/09 IRIS DMC Gillian Sharer DMC O20K TA ?H? 2018,023,09:35 2018,023,11:29 Problem Description OTHER TA.O20K did not record accurate data during the 2018.063 Mw 7.9 Gulf of Alaska event because the earthquake pushed VM3 against the stops. The masses were re-centered on 2018.023 11:29 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2018:0339 2018/03/09 IRIS DMC Gillian Sharer DMC HOM AK ?H? 2018,023,09:34 2018,023,22:13 Problem Description OTHER AK.HOM did not record accurate data during the 2018.063 Mw 7.9 Gulf of Alaska event because the earthquake pushed the VM6 against the stops. The masses were re-centered on 2018.023 22:13 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2018:0340 2018/03/09 IRIS DMC Gillian Sharer DMC J56A N4 ?HE 2017,318,00:00 0000,000,00:00 Problem Description LOW FREQUENCY NOISE N4.J56A.?HE is recording elevated levels of long period noise beginning around 2018.318, likely a sensor issue. Ongoing. END **************************************************************************** DATA PROBLEM REPORT DMCQC2018:0341 2018/03/09 IRIS DMC Gillian Sharer DMC J56A N4 ?H? 2018,025,05:30 2018,029,22:55 Problem Description OTHER On 2018.025, N4.J56A..VM3 came up against the stops. After multiple mass re-center attempts, it was successfully re-centered on 2018.029 22:55 UTC. The sensor was not recording accurate seismic data during this time period. END **************************************************************************** DATA PROBLEM REPORT DMCQC2018:0342 2018/03/09 IRIS DMC Gillian Sharer DMC P53A N4 ?HE 2017,309,17:58 2017,340,19:10 Problem Description INVALID RESPONSE From 2017.309 17:58- 2017.340 19:10 UTC, N4.P53A..?HE returned reduced amplitudes ~50% of expected, likely the result of a differential output issue. Normal amplitudes resumed for E after a service visit. END **************************************************************************** DATA PROBLEM REPORT DMCQC2018:0343 2018/03/09 IRIS DMC Gillian Sharer DMC P53A N4 ?HN 2017,340,19:10 2017,364,23:50 Problem Description INVALID RESPONSE From 2017.340 19:10 - 2017.364 23:50 UTC, N4.P52A..?HN returned reduced amplitudes ~50% of expected, likely the result of a differential output issue. The problem began after a service visit and resolved spontaneously. END **************************************************************************** DATA PROBLEM REPORT DMCQC2018:0344 2018/03/09 IRIS DMC Gillian Sharer DMC P53A N4 ?HE 2018,063,22:20 0000,000,00:00 Problem Description INVALID RESPONSE On 2018.063 22:20 UTC, N4.P53A..?HE experienced a drop in dc offset of ~3000 counts and began recording amplitudes that are ~50% of normal. Likely a differential output issue. Ongoing. END **************************************************************************** DATA PROBLEM REPORT DMCQC2018:0345 2018/04/25 IRIS DMC Gillian Sharer DMC N62A N4 * 2017,264,14:00 2017,338,20:00 Problem Description OTHER On 2017.264, the Z channel of N62A started showing signs of sensor noise. By 2017.309 N was recording sensor noise and a few days later E was also. On 2017.324 VM1 hit the stops, followed shortly after by VM2 and VM3, and the sensor stopped responding to mass recenter attempts. A service visit on 2017.338 replaced the defective sensor and the station started recording normal seismic data again. END **************************************************************************** DATA PROBLEM REPORT DMCQC2018:0346 2018/04/25 IRIS DMC Gillian Sharer DMC 656A N4 ?HZ 2017,191,12:30 2018,019,21:00 Problem Description OTHER N4.656A.?HZ began recording increased sensor noise on 2017.191. By 2017.298, the Z channel stopped recording seismic energy and returned noise only. Also, VM1 came up against the stops on 2017.311 and would not respond to mass recenter attempts. On 2018-01-19, the broken sensor was removed and a new sensor installed, which fixed the problem. END **************************************************************************** DATA PROBLEM REPORT DMCQC2018:0347 2018/04/25 IRIS DMC Gillian Sharer DMC R50A N4 ?HE 2018,001,14:12 0000,000,00:00 Problem Description INVALID RESPONSE Beginning on 2018.001, N4.R50A..?HE has been alternating between recording data at 50% amplitude levels and at normal amplitude levels, likely a differential output problem. END **************************************************************************** DATA PROBLEM REPORT DMCQC2018:0348 2018/04/25 IRIS DMC Gillian Sharer DMC Q52A N4 ?HZ 2017,299,12:00 2017,357,04:20 Problem Description LOW FREQUENCY NOISE N4.Q52A.?HZ began experiencing ping-like noise on Z that gradually increased in amplitude over several months. The noise resolved after a mass lock/unlock on 2017.356. END **************************************************************************** DATA PROBLEM REPORT DMCQC2018:0349 2018/04/25 IRIS DMC Gillian Sharer DMC N41A N4 * 2017,343,06:00 0000,000,00:00 Problem Description LOW FREQUENCY NOISE N4.N41A has been experiencing intermittent noise on all 3 channels, probably resulting from corrosion. END **************************************************************************** DATA PROBLEM REPORT DMCQC2018:0335 2018/03/09 IRIS DMC Gillian Sharer DMC E21K TA ?H? 2018,016,04:43 2018,118,23:00 Problem Description OTHER On January 16, 2018 04:43 UTC, TA.E21K..VM3 came up against the stops. DC offsets for E,N, and Z increased into the millions of counts. The sensor did not record accurate seismic data during this timespan. END PROBLEM RESOLUTION REPORT DMCQC2018:0335 2018/05/01 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION A service visit on June 28, 2018 23 replaced the sensor and cables at ~23:00 UTC. After this service, the mass positions are in the normal range and the station is recording accurate seismic data again. END **************************************************************************** DATA PROBLEM REPORT DMCQC2018:0350 2018/05/04 IRIS DMC Gillian Sharer DMC Y49A N4 ?HE 2018,004,07:40 2018,092,05:50 Problem Description INVALID RESPONSE From 2018.004 07:40 UTC - 2018.092 05:50 UTC, N4.Y49A..?HE recorded unreliable amplitudes which at times were 50% of expected. This is likely an intermittent differential output issue related to corrosion. END **************************************************************************** DATA PROBLEM REPORT DMCQC2018:0351 2018/05/04 IRIS DMC Gillian Sharer DMC MSTX TA ?H? 2018,120,14:30 0000,000,00:00 Problem Description OTHER Starting on 2018.120 14:30 UTC, TA.MSTX..?H? stopped recording accurate seismic data. The broadband sensor is returning only noise, likely related to corrosion. END **************************************************************************** DATA PROBLEM REPORT DMCQC2017:0325 2017/10/19 IRIS DMC Gillian Sharer DMC G16K TA ?HE 2017,210,20:10 2018,142,21:35 Problem Description INVALID RESPONSE Following a replacement of the Q330 digitizer, the amplitudes at TA.G16K..?HE are smaller than expected by ~50%. This may be a differential output problem. END PROBLEM RESOLUTION REPORT DMCQC2017:0325 2018/06/01 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION A service visit on 2018.142 determined that the VM3 mass channel was not responding normally. After replacement of the sensor and the Q330, the E channel began recording with normal amplitudes again. END **************************************************************************** DATA PROBLEM REPORT DMCQC2018:0352 2018/06/01 IRIS DMC Gillian Sharer DMC 121A TA ?HZ 2018,146,04:10 2018,151,14:05 Problem Description INVALID RESPONSE On 2018.146 04:10 UTC, TA.121A..?HZ suddenly began recording 50% lower than normal amplitudes, accompanied by a drop in DC offset of 2800 counts. This differential output problem was fixed by a service visit on 2018.151 14:05 UTC. 121A..?HZ began recording at normal amplitudes again after a faulty cable was replaced. END **************************************************************************** DATA PROBLEM REPORT DMCQC2018:0329 2018/02/05 IRIS DMC Gillian Sharer DMC S22A TA ?HN 2017,341,05:25 2018,165,02:00 Problem Description INVALID RESPONSE S22A.?HN began returning reduced amplitudes again on 2017.341 05:25 UTC. END PROBLEM RESOLUTION REPORT DMCQC2018:0329 2018/10/10 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The sensor was replaced on 2018.165 after which the channel began returning normal amplitudes. END **************************************************************************** DATA PROBLEM REPORT DMCQC2018:0344 2018/03/09 IRIS DMC Gillian Sharer DMC P53A N4 ?HE 2018,063,22:20 2018,252,23:18 Problem Description INVALID RESPONSE On 2018.063 22:20 UTC, N4.P53A..?HE experienced a drop in dc offset of ~3000 counts and began recording amplitudes that are ~50% of normal. Likely a differential output issue. END PROBLEM RESOLUTION REPORT DMCQC2018:0344 2018/10/05 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION Normal amplitudes are recovered after a mass recenter on 2018.252 23:18 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2018:0337 2018/03/09 IRIS DMC Gillian Sharer DMC N4Q54 N4 ?H? 2017,363,11:45 Problem Description LOW FREQUENCY NOISE Beginning on 2017.363, N4.Q54A.?H? began to record intermittent low frequency noise that is likely caused by corrosion. In addition, and possibly related, one or more masses were at the stops from 2018.024 00:55-2018.025 19:10 UTC and from 2018.047 20:20-2018.056 00:25 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2018:0355 2018/10/05 IRIS DMC Gillian Sharer DMC SUSD TA ?HN 2018,074,05:30 2018,118,00:00 Problem Description OTHER From 2018.074 - 2018.118, TA.SUSD experienced intermittent corrosion-related noise, mostly on the N channel. A service visit on 2018.123 found and cleaned corrosion in the sensor connector and plug. END **************************************************************************** DATA PROBLEM REPORT DMCQC2018:0356 2018/10/05 IRIS DMC Gillian Sharer DMC I20K TA ?H? 2018,130,19:32 2018,138,15:06 Problem Description OTHER TA.I20K masses hit the stops multiple times between 2018.130 and 2018.138. Seismic data may not be reliable during this time period. END **************************************************************************** DATA PROBLEM REPORT DMCQC2018:0357 2018/10/05 IRIS DMC Gillian Sharer DMC G24K TA * 2018,154,22:23 2018,171,22:00 Problem Description DEAD CHANNEL TA.G24K started returning digitizer noise on 2018.154 22:23 UTC. A service visit on 2018.171 found that a bear had destroyed the sensor, GPS, and weather instrument cables. The station returned to normal operation after the cables were replaced and other site damage was fixed. END **************************************************************************** DATA PROBLEM REPORT DMCQC2018:0358 2018/10/05 IRIS DMC Gillian Sharer DMC 121A TA ?HZ 2018,146,04:05 2018,151,16:00 Problem Description INVALID RESPONSE From 2018.146 - 2018.151, TA.121A..?HZ returned amplitudes approximately 50% of normal expected values. This is likely a differential output problem. The channel began recording normal amplitudes again after a service visit replaced the sensor cable. END **************************************************************************** DATA PROBLEM REPORT DMCQC2018:0359 2018/10/05 IRIS DMC Gillian Sharer DMC 121A TA ?HZ 2018,179,05:24 2018,181,17:37 Problem Description INVALID RESPONSE From 2018.179 - 2018.181, TA.121A..?HZ returned lower than expected amplitudes, by approximately 50%. The channel began returning normal amplitudes again after a service visit re-routed the host-box-to-digitizer cable. END **************************************************************************** DATA PROBLEM REPORT DMCQC2018:0360 2018/10/08 IRIS DMC Gillian Sharer DMC G65A N4 * 2017,304,10:41 2017,305,20:13 Problem Description OTHER On 2017.304 10:41 UTC, N4.G65A masses suddenly came up against the stops and stopped responding to remote mass recenter attempts. The sensor did return accurate data during this time. A service visit on 2017.305 found that the vault had been tilted after a run-in with an excavator. Normal data recording resumed after the sensor was re-leveled. END **************************************************************************** DATA PROBLEM REPORT DMCQC2018:0361 2018/10/08 IRIS DMC Gillian Sharer DMC C26K TA BH? 2018,224,14:59 2018,224,15:00 Problem Description OTHER Seismic data from TA.C26K clipped during the 2018.224 14:58:54 UTC Alaska event, ml 6.3. END **************************************************************************** DATA PROBLEM REPORT DMCQC2018:0362 2018/10/08 IRIS DMC Gillian Sharer DMC C27K TA BH? 2018,224,14:59 2018,224,15:00 Problem Description OTHER Seismic data from TA.C27K clipped during the 2018.224 14:58:54 UTC Alaska event, ml 6.3. END **************************************************************************** DATA PROBLEM REPORT DMCQC2018:0363 2018/10/08 IRIS DMC Gillian Sharer DMC C27K TA ?HN 2018,224,14:59 2018,224,16:38 Problem Description OTHER TA.C27K..VM1 hit the stops during the 2018.224 14:58:54 UTC Alaska event, ml 6.3, affecting the N component data. The mass was re-centered at 16:38 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2018:0364 2018/10/08 IRIS DMC Gillian Sharer DMC F19K TA * 2018,231,22:03 2018,233,05:44 Problem Description OTHER TA.F19K masses were up against the stops from 2018.231 22:03 UTC to 2018.233 05:44 UTC, while the station was being serviced. END **************************************************************************** DATA PROBLEM REPORT DMCQC2018:0365 2018/10/08 IRIS DMC Gillian Sharer DMC F19KG TA ?H? 2018,234,22:32 2018,235,17:03 Problem Description OTHER TA.G19K masses suddenly came up against the stops on 2018.234 22:32 UTC. Data recorded during this time period may not be accurate. The masses were successfully re-centered on 2018.235 17:03 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2018:0366 2018/10/08 IRIS DMC Gillian Sharer DMC H22K TA ?H? 2018,236,02:10 2018,236,11:10 Problem Description OTHER TA.H22K..VM[12] masses were against the stops from 2018.236 02:10-11:10 UTC. The station was not returning accurate seismic data during this time. It was fixed by a remote mass recenter. END **************************************************************************** DATA PROBLEM REPORT DMCQC2018:0367 2018/10/08 IRIS DMC Gillian Sharer DMC L29M TA ?H? 2018,228,06:13 2018,240,23:18 Problem Description DEAD CHANNEL TA.L29M..?H? suddenly started returning digitizer noise and other non-seismic noise on 2018.228 06:18 UTC. A service visit replaced the bear-damaged sensor cable on 2018.240 23:18 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2018:0368 2018/10/08 IRIS DMC Gillian Sharer DMC D19K TA ?HE 2018,201,02:46 2018,232,19:00 Problem Description INVALID RESPONSE On 2018.201 02:46 UTC, TA.D19K..?HE suddenly began returning amplitudes that were approximately 50% lower than expected values. A service visit found that the sensor cable had been chewed by a bear. The channel began returning normal amplitudes after the cable was replaced on 2018.232 19:00 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2018:0369 2018/10/08 IRIS DMC Gillian Sharer DMC D19K TA ?HN 2018,201,02:46 2018,232,19:00 Problem Description DEAD CHANNEL On 2018.201 02:46 UTC, TA.D19K..?HN suddenly began returning digitizer noise. A service visit found that the sensor cable had been chewed by a bear. The channel began returning normal data after the cable was replaced on 2018.232 19:00 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2018:0370 2018/10/08 IRIS DMC Gillian Sharer DMC G15K TA ?HE 2018,205,23:38 2018,234,00:35 Problem Description INVALID RESPONSE On 2018.205 23:38 UTC, TA.G15K..?HE suddenly started returning amplitudes that were approximately 50% lower than expected along with a decrease in DC offset values. A service visit found that the sensor cable had been damaged by a bear. The sensor and sensor cable were replaced on 2018.234 00:35 UTC. At that time, normal data recording resumed. END **************************************************************************** DATA PROBLEM REPORT DMCQC2018:0347 2018/04/25 IRIS DMC Gillian Sharer DMC R50A N4 ?HE 2018,001,14:12 2018,109,03:20 Problem Description INVALID RESPONSE Beginning on 2018.001, N4.R50A..?HE has been alternating between recording data at 50% amplitude levels and at normal amplitude levels, likely a differential output problem. The vault has a history of water intrusion so this may be corrosion related. END PROBLEM RESOLUTION REPORT DMCQC2018:0347 2018/10/08 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The half-amplitude state was last observed on 2018.109 03:20 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2018:0372 2018/10/08 IRIS DMC Gillian Sharer DMC TUL3 TA 01/?H? 2018,114,00:04 2018,117,17:20 Problem Description DEAD CHANNEL TA.TUL3.01 returned digitizer noise after 2018.114 00:04 UTC, when the sensor was removed. END **************************************************************************** DATA PROBLEM REPORT DMCQC2018:0351 2018/05/04 IRIS DMC Gillian Sharer DMC MSTX TA ?H? 2018,120,14:30 2018,132,17:57 Problem Description OTHER Starting on 2018.120 14:30 UTC, TA.MSTX..?H? stopped recording accurate seismic data. The broadband sensor is returning only noise, likely related to corrosion. END PROBLEM RESOLUTION REPORT DMCQC2018:0351 2018/10/10 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION The sensor began returning accurate seismic data again after the host box was replaced. The service visit observed that there was visible corrosion in host box S3 connector. END **************************************************************************** DATA PROBLEM REPORT DMCQC2018:0374 2018/10/10 IRIS DMC Gillian Sharer DMC KMSC TA ?H[NZ] 2017,213,19:56 2017,225,00:00 Problem Description OTHER From 2017.213-2017.225, TA.KMSC..?H[NZ] experienced significant non-seismic noise, likely caused by corrosion. A service visit on 2017.288 observed water in the vault. END **************************************************************************** DATA PROBLEM REPORT DMCQC2011:0048 2018/10/09 IRIS DMC Gillian Sharer DMC 247A TA ?HE 2011,201,16:50 2011,328,15:45 Problem Description INVALID RESPONS On day 2011 201 16:50 UTC, TA.247A.?HE experienced a significant decrease in amplitudes accompanied by a change in dc offset of ~1500-2500 counts. Amplitude values are unreliable. END PROBLEM RESOLUTION REPORT DMCQC2011:0048 2018/10/09 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION 247A resumed normal data recording after the sensor, cost box, and cable were replaced on 2011.328 15:45 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2018:0376 2018/10/11 IRIS DMC Gillian Sharer DMC TRF AK ?H? 2018,158,02:40 2018,283,17:50 Problem Description DEAD CHANNEL AK.TRF..?H? suddenly started returning digitizer noise on 2018.158 02:40 UTC. The station began returning normal data again after a service visit on 2018.283. END **************************************************************************** DATA PROBLEM REPORT DMCQC2018:0377 2018/10/11 IRIS DMC Gillian Sharer DMC S22A TA ?HN 2018,278,19:37 0000,000,00:00 Problem Description INVALID RESPONSE On 2018.278, TA.S22A..?HN began returning amplitudes that are approximately 50% of expected. This looks like a differential output problem. END **************************************************************************** DATA PROBLEM REPORT DMCQC2018:0377 2018/10/11 IRIS DMC Gillian Sharer DMC S22A TA ?HN 2018,278,19:37 2018,306,02:10 Problem Description INVALID RESPONS On 2018.278, TA.S22A..?HN began returning amplitudes that are approximately 50% of expected. This looks like a differential output problem. END PROBLEM RESOLUTION REPORT DMCQC2018:0377 2019/01/29 IRIS DMC Gillian Sharer Description of Problem Resolution RESOLUTION Normal amplitudes were restored after a service visit replaced the Q330 host box cable on 2018.306. END **************************************************************************** DATA PROBLEM REPORT DMCQC2019:0378 2019/01/29 IRIS DMC Gillian Sharer DMC 121A TA ?HZ 2018,317,09:35 2018,321,18:07 Problem Description INVALID RESPONSE From 2018.317 09:35 UTC to 2018.321 18:07 UTC, TA.121A..?HZ returned amplitude that were ~50% of expected values (likely a differential output problem). Normal amplitudes were restored after a service visit replaced the STS2 host box. END **************************************************************************** DATA PROBLEM REPORT DMCQC2019:0379 2019/01/29 IRIS DMC Gillian Sharer DMC 121A TA ?HN 2018,324,18:39 2019,023,21:04 Problem Description INVALID RESPONSE Immediately following a calibration, at 2018.324 18:39 UTC, TA.121A..?HN amplitudes dropped by ~50% along with a dc offset shift of -2500 counts. It recovered 3 hours later, but continued to have intermittent episodes of half-amplitude behavior daily (roughly tracking the solar charging cycle). Then on 2018.336 17:17 UTC, it dropped into half-amplitude state and stayed there. 121A..?HN resumed recording normal amplitudes on 2019.023 21:04 UTC. END **************************************************************************** DATA PROBLEM REPORT DMCQC2019:0380 2019/01/29 IRIS DMC Gillian Sharer DMC G15K TA ?H? 2018,295,19:42 2018,299,17:20 Problem Description OTHER On 2018.295 19:42 UTC, TA.G15K..VM2 hit the stops and stopped responding to remote mass recenter commands. Seismic data is not reliable during this time and DC offsets are in the millions of counts. VM2 moved off the stops on 2018.299 17:20 UTC and normal data resumed. END **************************************************************************** DATA PROBLEM REPORT DMCQC2019:0381 2019/01/29 IRIS DMC Gillian Sharer DMC C36M TA ?H? 2019,008,10:00 2019,009,14:55 Problem Description OTHER TA.C36M..VM[23] came up against the stops on 2019.008 10:00 UTC. Seismic data is not reliable during this time period; DC offsets are in the millions of counts. Normal data recording resumed on 2019.009 14:55 UTC after a successful remote mass recenter. END **************************************************************************** DATA PROBLEM REPORT DMCQC2019:0382 2019/01/30 IRIS DMC Gillian Sharer DMC CAPN AK BH? 2018,334,17:29 2018,334,17:32 Problem Description OTHER Broadband clipped during the 2018.334 17:29:29 UTC Mww7.0 Southern Alaska event. END **************************************************************************** DATA PROBLEM REPORT DMCQC2019:0383 2019/01/31 IRIS DMC Gillian Sharer DMC GLI AK BH? 2018,334,17:29 2018,334,17:31 Problem Description OTHER AK.GLI..BH[EN] broadband channels clipped during the 2018.334 17:29:29 UTC Mww7.0 Southern Alaska event. END **************************************************************************** DATA PROBLEM REPORT DMCQC2019:0384 2019/01/31 IRIS DMC Gillian Sharer DMC HARP TA BH? 2018,334,17:29 2018,334,17:57 Problem Description OTHER TA.HARP..BH[EN] channels clipped during the 2018.334 17:29:29 UTC Mww7.0 Southern Alaska event. In addition, one or more mass channels came up against the stops during the earthquake. END **************************************************************************** DATA PROBLEM REPORT DMCQC2019:0385 2019/01/31 IRIS DMC Gillian Sharer DMC I20K TA BH? 2018,334,17:29 2018,334,17:32 Problem Description OTHER TA.I20K..BH[EN] channels clipped during the 2018.334 17:29:29 UTC Mww7.0 Southern Alaska event. END **************************************************************************** DATA PROBLEM REPORT DMCQC2019:0386 2019/01/31 IRIS DMC Gillian Sharer DMC K24K TA BH? 2018,334,17:29 2018,334,17:32 Problem Description OTHER TA.K24K..BH[EN] channels clipped during the 2018.334 17:29:29 UTC Mww7.0 Southern Alaska event. END **************************************************************************** DATA PROBLEM REPORT DMCQC2019:0387 2019/01/31 IRIS DMC Gillian Sharer DMC KNK AK BH? 2018,334,17:29 2018,334,17:31 Problem Description OTHER AK.KNK..BH[ENZ] channels clipped during the 2018.334 17:29:29 UTC Mww7.0 Southern Alaska event. END **************************************************************************** DATA PROBLEM REPORT DMCQC2019:0388 2019/01/31 IRIS DMC Gillian Sharer DMC M22K TA BH? 2018,334,17:29 2018,334,17:32 Problem Description OTHER TA.M22K..BH[ENZ] channels clipped during the 2018.334 17:29:29 UTC Mww7.0 Southern Alaska event. END **************************************************************************** DATA PROBLEM REPORT DMCQC2019:0389 2019/01/31 IRIS DMC Gillian Sharer DMC M24K TA BH? 2018,334,17:29 2018,334,17:32 Problem Description OTHER TA.M24K..BH[ENZ] channels clipped during the 2018.334 17:29:29 UTC Mww7.0 Southern Alaska event. END **************************************************************************** DATA PROBLEM REPORT DMCQC2019:0390 2019/01/31 IRIS DMC Gillian Sharer DMC N20K TA BH? 2018,334,17:29 2018,334,17:31 Problem Description OTHER TA.N20K..BH[ENZ] channels clipped during the 2018.334 17:29:29 UTC Mww7.0 Southern Alaska event. END **************************************************************************** DATA PROBLEM REPORT DMCQC2019:0391 2019/01/31 IRIS DMC Gillian Sharer DMC O20K TA BH? 2018,334,17:29 2018,334,18:17 Problem Description OTHER TA.O20K..BH[EN] channels clipped during the 2018.334 17:29:29 UTC Mww7.0 Southern Alaska event. In addition, one or more mass channels came up against the stops during the earthquake. END **************************************************************************** DATA PROBLEM REPORT DMCQC2019:0392 2019/01/31 IRIS DMC Gillian Sharer DMC O22K TA BH? 2018,334,17:29 2018,334,17:31 Problem Description OTHER TA.O22K..BH[ENZ] channels clipped during the 2018.334 17:29:29 UTC Mww7.0 Southern Alaska event. END **************************************************************************** DATA PROBLEM REPORT DMCQC2019:0393 2019/01/31 IRIS DMC Gillian Sharer DMC P17K TA BH? 2018,334,17:29 2018,334,17:32 Problem Description OTHER TA.P17K..BH[ENZ] channels clipped during the 2018.334 17:29:29 UTC Mww7.0 Southern Alaska event. END **************************************************************************** DATA PROBLEM REPORT DMCQC2019:0394 2019/01/31 IRIS DMC Gillian Sharer DMC RC01 AK BH? 2018,334,17:29 2018,334,17:32 Problem Description OTHER AK.RC01..BH[ENZ] channels clipped during the 2018.334 17:29:29 UTC Mww7.0 Southern Alaska event. END **************************************************************************** DATA PROBLEM REPORT DMCQC2019:0395 2019/01/31 IRIS DMC Gillian Sharer DMC SAW AK BH? 2018,334,17:29 2018,334,17:31 Problem Description OTHER AK.SAW..BH[ENZ] channels clipped during the 2018.334 17:29:29 UTC Mww7.0 Southern Alaska event. END **************************************************************************** DATA PROBLEM REPORT DMCQC2019:0396 2019/01/31 IRIS DMC Gillian Sharer DMC SKN AK BH? 2018,334,17:29 2018,334,17:31 Problem Description OTHER AK.SKN..BH[ENZ] channels clipped during the 2018.334 17:29:29 UTC Mww7.0 Southern Alaska event. END **************************************************************************** DATA PROBLEM REPORT DMCQC2019:0397 2019/01/31 IRIS DMC Gillian Sharer DMC SSN AK BH? 2018,334,17:29 2018,334,18:24 Problem Description OTHER AK.SSN..BH[ENZ] channels clipped during the 2018.334 17:29:29 UTC Mww7.0 Southern Alaska event. In addition, one or more mass channels came up against the stops during the earthquake. END **************************************************************************** DATA PROBLEM REPORT DMCQC2019:0398 2019/MM/DD IRIS DMC [Fill in your name and email] DMC Problem Description DATA DROPOUTS END PROBLEM RESOLUTION REPORT DMCQC2019:0398 2019/MM/DD IRIS DMC [Fill in your name and email] Description of Problem Resolution RESOLUTION END **************************************************************************** DATA PROBLEM REPORT DMCQC2019:0399 2019/02/27 IRIS DMC Gillian Sharer DMC A36M TA * 2014,300,00:00 2015,201,18:00 Problem Description OTHER On 2014.300 TA.A36M..VM1 came up against the stops. VM3 also hit the stops several days later. During this time period A36M was not recording accurate seismic data. The masses moved off the stops on 2015.201 END **************************************************************************** DATA PROBLEM REPORT IDA2012:010 2012/06/13 IDA DCC Erik Klimczak IDA MSVF II *** 2012,158,00:00:00 2012,158,00:00:00 Problem Description OTHER IDA station MSVF is down since day 2012,158-12:41 due to communication problems between the DAS and the ISP that are yet to be determined. END PROBLEM RESOLUTION REPORT IDA2012:010 2013/03/07 IDA Erik Klimczak Description of Problem Resolution RESOLUTION Data acquisition was restored on day 2013,018 after IDA engineers visited the station and upgraded it to a Quanterra Q330HR system. Sensors installed include KS54000 and Trillim 120 posthole seismometers, and an Episensor strong motion sensor. END **************************************************************************** DATA PROBLEM REPORT IDA2012:011 2012/06/13 IDA DCC Erik Klimczak IDA BFO II BHZ-00,LHZ-00,VHZ-00 2012,155,00:00:00 2012,155,00:00:00 Problem Description OTHER The vertical channels from the STS-1 seismometer are intermittently drifting out of normal operating range and become flat-lined due to loss of vacuum for the bell jar enclosure. The station operator plans on re-installing the STS-1 seismometer. END PROBLEM RESOLUTION REPORT IDA2012:011 2012/06/28 IDA Erik Klimczak Description of Problem Resolution RESOLUTION The vertical channels from the STS-1 seismometer are back in normal operating range after the station operator re-installed the STS-1 seismometer on day 2012,167-15:41. END **************************************************************************** DATA PROBLEM REPORT IDA2012:012 2012/06/28 IDA DCC Erik Klimczak IDA AAK II *** 2012,169,00:00:00 2012,169,00:00:00 Problem Description OTHER IDA station AAK is down as of day 2012,169-01:40 due to damages caused by a storm. The station is acquiring data, however, the GPS clock is unlocked and timing of the data is uncertain. New GPS antennas, surge protectors, and a bi-directional GPS cable are being shipped to the station. END PROBLEM RESOLUTION REPORT IDA2012:012 2012/09/07 IDA Erik Klimczak Description of Problem Resolution RESOLUTION The GPS clock for the AAK10 digitizer locked on day 2012,184-16:55. The GPS clock for the AAK00 digitizer remained unlocked until day 2012,206-06:41 when the station operator replaced the external GPS cable with an updated bi-directional cable sent from UCSD. END **************************************************************************** DATA PROBLEM REPORT IDA2012:013 2012/06/28 IDA DCC Erik Klimczak IDA ERM II *** 2012,177,00:00:00 2012,177,00:00:00 Problem Description OTHER IDA station ERM is down as of day 2012,177-22:37 due to problems with the DAS that are yet to be determined. END PROBLEM RESOLUTION REPORT IDA2012:013 2012/09/07 IDA Erik Klimczak Description of Problem Resolution RESOLUTION IDA station ERM is back on-line after two outages from day 2012,177 to 2012,187, and from day 2012,225 to 2012,233. Data acquisition was restored after the station operator visited the station to cycle power to the DAS. END **************************************************************************** DATA PROBLEM REPORT IDA2012:014 2012/06/28 IDA DCC Erik Klimczak IDA LVZ II *** 2012,162,00:00:00 2012,162,00:00:00 Problem Description OTHER IDA station LVZ is down as of day 2012,162-04:47 due to problems with the DAS that are yet to be determined. The station operator has been requested to cycle power to the DAS. END PROBLEM RESOLUTION REPORT IDA2012:014 2012/12/07 IDA Erik Klimczak Description of Problem Resolution RESOLUTION IDA station LVZ is back on-line as of day 2012,291 after it was upgraded to a Quanterra Q330 system. Sensors include STS-1 and GS-13 seismometers. END **************************************************************************** DATA PROBLEM REPORT IDA2012:015 2012/06/28 IDA DCC Erik Klimczak IDA TAU II *** 2011,173,00:00:00 2011,173,00:00:00 Problem Description OTHER There is excessive background noise for data from all sensors for reasons yet to be determined. The noise is non-seismic in nature and suspected to be from an external source. END **************************************************************************** DATA PROBLEM REPORT IDA2012:005 2012/04/27 IDA DCC Erik Klimczak IDA KDAK II LN*00,EN*00 2012,102,00:00:00 2012,102,00:00:00 Problem Description DEAD CHANNEL All channels from the FBA strong motion sensor are non-seismic for reasons yet to be determined. END PROBLEM RESOLUTION REPORT IDA2012:005 2013/01/02 IDA Erik Klimczak Description of Problem Resolution RESOLUTION An IDA engineer visited the station and replaced the FBA strong motion sensor with an Episensor. END **************************************************************************** DATA PROBLEM REPORT IDA2012:006 2012/04/27 IDA DCC Erik Klimczak IDA MSVF II LN*00,EN*00 2012,102,00:00:00 2012,102,00:00:00 Problem Description DEAD CHANNEL The Episensor strong motion sensor is not connected due to damaged components in the seismometer interface. END PROBLEM RESOLUTION REPORT IDA2012:006 2013/10/17 IDA Erik Klimczak Description of Problem Resolution RESOLUTION Data from the strong motion sensor was restored after IDA engineers replaced a faulty cable to the sensor during the station upgrade. END **************************************************************************** DATA PROBLEM REPORT IDA2012:007 2012/04/27 IDA DCC Erik Klimczak IDA PALK II LN*00,EN*00 2012,102,00:00:00 2012,102,00:00:00 Problem Description DEAD CHANNEL All channels from the FBA strong motion sensor are non-seismic for reasons yet to be determined. END **************************************************************************** DATA PROBLEM REPORT IDA2012:008 2012/05/15 IDA DCC Erik Klimczak IDA ABPO II BH*-10 2012,127,00:00:00 2012,127,00:00:00 Problem Description OTHER All channels from the STS-2 seismometer are showing abrupt changes in amplitudes as of day 2012,127-12:00, for reasons yet to be determined. END PROBLEM RESOLUTION REPORT IDA2012:008 2012/09/07 IDA Erik Klimczak Description of Problem Resolution RESOLUTION The station operator replaced the STS-2 on day 2012,199-10:45 with one shipped from UCSD. Remote calibration is now possible, and the data quality has improved. END **************************************************************************** DATA PROBLEM REPORT IDA2012:009 2012/05/15 IDA DCC Erik Klimczak IDA KAPI II *** 2012,135,00:00:00 2012,135,00:00:00 Problem Description OTHER IDA station KAPI is down due to problems with the ISP. Data are being acquired, however there is significant gapping. A new computer is being prepared to ship to the station. END PROBLEM RESOLUTION REPORT IDA2012:009 2012/06/28 IDA Erik Klimczak Description of Problem Resolution RESOLUTION Continuous data acquisition was restored after the station operator replaced the station computer on day 2012,145-01:51. END **************************************************************************** DATA PROBLEM REPORT IDA2012:001 2012/01/24 IDA DCC Erik Klimczak IDA MSVF II *** 2012,005,00:00:00 2012,005,00:00:00 Problem Description OTHER IDA station MSVF is down as of day 2012,005-05:04 due to power problems at the station. IDA engineers are working with the station operator to resolve the power problems. END PROBLEM RESOLUTION REPORT IDA2012:001 2012/03/20 IDA Erik Klimczak Description of Problem Resolution RESOLUTION IDA station MSVF is back on-line as of day 2012,069-22:28 after an IDA engineer visited the station and restored power. END **************************************************************************** DATA PROBLEM REPORT IDA2012:002 2012/02/15 IDA DCC Erik Klimczak IDA JTS II BH*-00 2012,023,00:00:00 2012,023,00:00:00 Problem Description OTHER All channels from the STS-1 seismometer are showing high background noise for reasons yet to be determined. Spiking on the vertical and East-West channels is highly correlated since day 2012,023. END **************************************************************************** DATA PROBLEM REPORT IDA2012:003 2012/03/20 IDA DCC Erik Klimczak IDA ESK II *** 2012,066,00:00:00 2012,080,00:00:00 Problem Description OTHER IDA station ESK was down from day 2012,066-17:11 to 2012,080-05:26 due to a power outage that caused loss of communication between the station computer and digitizers. Normal data acquisition resumed after the station operator restarted the fiber-optic transciever and cycled power to the digitizers. END **************************************************************************** DATA PROBLEM REPORT IDA2012:004 2012/04/11 IDA DCC Erik Klimczak IDA MSEY II *** 2012,052,00:00:00 2012,099,00:00:00 Problem Description OTHER IDA station MSEY was down from day 2012,052 to 2012,099 due to equipment damaged by lightning. Data acquisition was restored after IDA engineers visited the station and replaced ethernet switches and restored communication between the vault and recording room. END **************************************************************************** DATA PROBLEM REPORT ASL2011:001 2011/06/23 ASL DCC Tyler Storm ASL KMBO IU 00/?H1 2011,130,00:00:00 2011,130,00:00:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4625 Invalid instrument response. The H1 STS-1 at KMBO has a lowered response. At this point I'm not sure if this is the amplitude dependent moisture issue we have seen in the past. END **************************************************************************** DATA PROBLEM REPORT IDA2012:020 2012/09/27 IDA DCC Erik Klimczak IDA MBAR II LN*-00,EN*-00 2012,247,00:00:00 2012,247,00:00:00 Problem Description DEAD CHANNEL Data from the strong motion sensor at MBAR is non-seismic for reasons yet to be determined. END **************************************************************************** DATA PROBLEM REPORT IDA2004:044 2006/09/12 IDA DCC Erik Klimczak IDA ERM II LNZ,ENZ 2004,067,00:00:00 2004,067,00:00:00 Problem Description DEAD CHANNEL The vertical channels for the FBA-23 sensor are non-seismic due to a faulty sensor. END PROBLEM RESOLUTION REPORT IDA2004:044 2012/12/07 IDA Erik Klimczak Description of Problem Resolution RESOLUTION The FBA-23 sensor at IDA station ERM was replaced with an Episensor strong motion sensor when IDA engineers upgraded the station to a Quanterra Q330HR system. END **************************************************************************** DATA PROBLEM REPORT IDA2012:021 2012/09/27 IDA DCC Erik Klimczak IDA AAK II *** 2012,258,00:00:00 2012,258,00:00:00 Problem Description OTHER IDA station AAK is down as of day 2012,258-10:05 due to power problems at the station. A replacement power inverter is being prepared to ship to the station. END PROBLEM RESOLUTION REPORT IDA2012:021 2012/10/30 IDA Erik Klimczak Description of Problem Resolution RESOLUTION IDA station AAK is back on-line as of day 2012,299-08:12 after the station operator replaced the Newmar power inverter and a power supply on the network switch. END **************************************************************************** DATA PROBLEM REPORT IDA2012:022 2012/09/27 IDA DCC Erik Klimczak IDA JTS II *** 2012,261,00:00:00 2012,268,00:00:00 Problem Description OTHER The GPS clocks at IDA station JTS were unlocked after they were damaged by lightning. The GPS clocks locked again after the station operator replaced the antennas. The timing for data from the JTS-10 digitizer is uncertain from day 2012,261-22:06 to 2012,268-19:06. END **************************************************************************** DATA PROBLEM REPORT IDA2012:023 2012/09/27 IDA DCC Erik Klimczak IDA TLY II *** 2012,260,00:00:00 2012,268,00:00:00 Problem Description OTHER IDA station TLY was down from day 2012,260-13:05 to 2012,268-07:47 for reasons yet to be determined. There are plans to upgrade the station to a Q330 system. END **************************************************************************** DATA PROBLEM REPORT IDA2012:024 2012/10/30 IDA DCC Erik Klimczak IDA ARU II *** 2012,291,00:00:00 2012,291,00:00:00 Problem Description OTHER IDA station ARU is down as of day 2012,291 due to problems with the digitizer and power to the station. There are plans to upgrade the station to a Q330 system. END **************************************************************************** DATA PROBLEM REPORT IDA2012:025 2012/12/07 IDA DCC Erik Klimczak IDA PALK II BH*-00,LH*-00 2012,317,00:00:00 2012,317,00:00:00 Problem Description OTHER All channels from the KS-54000 seismometer became non-seismic on day 2012,317-17:01 due to a loss of power downhole. A faulty sensor interface box is suspected. A replacement sensor interface box has been shipped to the station. END PROBLEM RESOLUTION REPORT IDA2012:025 2013/03/07 IDA Erik Klimczak Description of Problem Resolution RESOLUTION All channels from the KS-54000 seismometer have been restored as of day 2013,029-06:49 after the station operator replaced the seismometer interface box. END **************************************************************************** DATA PROBLEM REPORT IDA2012:026 2012/12/07 IDA DCC Erik Klimczak IDA ASCN II BHZ-00,LHZ-00 2012,325,00:00:00 2012,325,00:00:00 Problem Description OTHER The vertical channels from the KS-54000 became non-seismic on day 2012,325-23:24 for reasons yet to be determined. The vertical channels started showing a strange signal for about an hour a day beginning 2012,323 before becoming non-seismic. END **************************************************************************** DATA PROBLEM REPORT IDA2012:016 2012/09/07 IDA DCC Erik Klimczak IDA KWAJ II *** 2012,046,00:00:00 2012,046,00:00:00 Problem Description OTHER IDA station KWAJ is down due to a prolonged telemetry outage. Access to the station is restricted due to changing network configurations at the site. A station visit by an IDA engineer is planned. END PROBLEM RESOLUTION REPORT IDA2012:016 2012/09/27 IDA Erik Klimczak Description of Problem Resolution RESOLUTION IDA station KWAJ is back on-line as of day 2012,269-23:29 after an IDA engineer visited the station and replaced the station computers and firewall. END **************************************************************************** DATA PROBLEM REPORT IDA2012:017 2012/09/07 IDA DCC Erik Klimczak IDA SACV II *** 2012,208,00:00:00 2012,208,00:00:00 Problem Description OTHER IDA station SACV is down as of day 2012,208-20:41 due to power problems. Replacement batteries for the power system are being prepared to ship to the station. END PROBLEM RESOLUTION REPORT IDA2012:017 2013/03/07 IDA Erik Klimczak Description of Problem Resolution RESOLUTION IDA station SACV is back online as of day 2013,014 after an IDA engineer visited the station and upgraded it to a Quanterra Q330HR system. Sensors installed include KS-54000 and Trillium 120 posthole seismometers, an Episensor motion sensor, and a Setra microbarograph. END **************************************************************************** DATA PROBLEM REPORT IDA2012:018 2012/09/07 IDA DCC Erik Klimczak IDA NIL II *** 2012,195,00:00:00 2012,195,00:00:00 Problem Description OTHER The NIL-10 DAS is causing data gaps since day 2012,195-09:00. A replacement DAS has been shipped to the station. END PROBLEM RESOLUTION REPORT IDA2012:018 2012/09/27 IDA Erik Klimczak Description of Problem Resolution RESOLUTION Data is continuous after the station operator replaced the NIL-10 DAS with one shipped from UCSD. END **************************************************************************** DATA PROBLEM REPORT IDA2012:019 2012/09/27 IDA DCC Erik Klimczak IDA MBAR II *** 2012,239,00:00:00 2012,262,00:00:00 Problem Description OTHER The East-West channels from the CMG-3T seismometer were showing high background noise from day 2012,239-21:00 to 2012,262-21:22. Data quality improved when the masses for the CMG-3T seismometer were re-centered. END **************************************************************************** DATA PROBLEM REPORT IDA2013:017 2013/12/11 IDA DCC Erik Klimczak IDA RPN II *** 2013,340,00:00:00 2013,340,00:00:00 Problem Description OTHER The station operator reports the Newmar power supply has failed. The station is down as data acquisition is sporadic, and power outages are occurring every hour. END **************************************************************************** DATA PROBLEM REPORT IDA2013:015 2013/10/17 IDA DCC Erik Klimczak IDA UOSS II *** 2013,217,00:00:00 2013,274,00:00:00 Problem Description OTHER IDA station UOSS was down from day 2013,217-17:30 to day 2013,274-06:38 due to power problems at the station. Data acquisition resumed after an IDA engineer visited the station and restored power. END **************************************************************************** DATA PROBLEM REPORT IDA2013:016 2013/11/21 IDA DCC Erik Klimczak IDA KWAJ II *** 2013,248,00:00:00 2013,297,00:00:00 Problem Description OTHER IDA station KWAJ was down from day 2013,248-14:55 to 2013,297-21:12 due to a faulty power supply. Data acquisition was restored after the station operator replaced the power supply with one shipped from UCSD. END **************************************************************************** DATA PROBLEM REPORT ASL2012:001 2012/06/26 ASL DCC Tyler Storm ASL KMBO IU * 2012,151,00:00:00 2012,151,00:00:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 440 Clock Unlocked. Timing quality at KMBO had been low for some time, but on day 151 the primary and secondary timing differed by 13 seconds after a system reset. After another system reset on day 169 the primary and secondary appear to be 120 seconds different with the 00 data being 60 seconds fast and the 10 data 120 seconds fast. END **************************************************************************** DATA PROBLEM REPORT IDA2013:002 2013/03/07 IDA DCC Erik Klimczak IDA COCO II BH*-10 2013,054,00:00:00 2013,054,00:00:00 Problem Description OTHER The STS-2 seismometer, digitizer, and other equipment in the secondary vault have been damaged by flooding of the vault. Data acquisition from the COCO-10 digitizer ceased on day 2013,054-04:39. END PROBLEM RESOLUTION REPORT IDA2013:002 2014/01/22 IDA Erik Klimczak Description of Problem Resolution RESOLUTION IDA engineers visited the station and replaced the STS-2 seismometer with a Trillium 120PH seismometer. All BH*-10 and LH*-10 channels have been restored. END **************************************************************************** DATA PROBLEM REPORT IDA2013:003 2013/03/07 IDA DCC Erik Klimczak IDA UOSS II *** 2013,054,00:00:00 2013,054,00:00:00 Problem Description OTHER IDA station UOSS is down as of day 2013,054-09:31 due to power problems at the station. IDA engineers are working with the station operator to resolve the power problems. END PROBLEM RESOLUTION REPORT IDA2013:003 2013/08/15 IDA Erik Klimczak Description of Problem Resolution RESOLUTION IDA station UOSS is back online as of day 2013,149-08:09 after an IDA engineer visited the station and upgraded the power system. The power system was converted from AC to DC power during the upgrade. END **************************************************************************** DATA PROBLEM REPORT IDA2013:001 2013/03/07 IDA DCC Erik Klimczak IDA MSVF II *** 2013,023,00:00:00 2013,023,00:00:00 Problem Description OTHER IDA station MSVF is down as of day 2013,023 due to GPS problems and communication problems with the digitizers. A trip to the station by an IDA engineer will be planned. END PROBLEM RESOLUTION REPORT IDA2013:001 2013/10/11 IDA Erik Klimczak Description of Problem Resolution RESOLUTION IDA station MSVF is back on-line as of day 2013,277 after IDA engineers visited the station and replaced the DAS. END **************************************************************************** DATA PROBLEM REPORT IDA2013:008 2013/05/01 IDA DCC Erik Klimczak IDA RAYN II *** 2013,079,00:00:00 2013,079,00:00:00 Problem Description OTHER IDA station RAYN is down as of day 2013,079 due to failure of the station computer and power problems at the station. A station visit by an IDA engineer is planned. END PROBLEM RESOLUTION REPORT IDA2013:008 2013/08/15 IDA Erik Klimczak Description of Problem Resolution RESOLUTION IDA station RAYN is back on-line as of day 2013,153 after an IDA engineer visited the station and upgraded the power system and replaced the station computer. END **************************************************************************** DATA PROBLEM REPORT IDA2013:009 2013/05/01 IDA DCC Erik Klimczak IDA NIL II BH*-00,LH*-00 2013,107,00:00:00 2013,107,00:00:00 Problem Description OTHER There is high background noise on the horizontal channels from the KS-54000 seismometer. The station operator reports heavy construction in the area that may be the source of this noise. END **************************************************************************** DATA PROBLEM REPORT IDA2013:006 2013/04/05 IDA DCC Erik Klimczak IDA MSEY II BH2-10,LH2-10 2013,028,00:00:00 2013,028,00:00:00 Problem Description DEAD CHANNEL The East-West channels from the CMG-3T seismometer are non-seismic as of day 2013,022. The masses for the CMG-3T seismometer are against the stops and need to be re-centered. END **************************************************************************** DATA PROBLEM REPORT IDA2013:007 2013/04/05 IDA DCC Erik Klimczak IDA MBAR II BH*-10,LH*-10 2013,072,00:00:00 2013,084,00:00:00 Problem Description OTHER All channels from the CMG-3T were intermittently non-seismic from day 2013,072 to 2013,084 due to the sensor becoming locked following power outages at the station. The channels were restored after the sensor was unlocked and re-centered once power was restored. END **************************************************************************** DATA PROBLEM REPORT IDA2013:004 2013/03/07 IDA DCC Erik Klimczak IDA NIL II *** 2013,065,00:00:00 2013,065,00:00:00 Problem Description OTHER IDA station NIL is down due to major equipment damages caused by flooding of the vault. Data acquisition ceased day 2013,065-06:17. END PROBLEM RESOLUTION REPORT IDA2013:004 2013/04/18 IDA Erik Klimczak Description of Problem Resolution RESOLUTION All channels from the Trillium 240 are seismic after the masses for the sensor were re-centered on day 2013,073-18:38. The KS-54000 channels are seismic as of day 2013,107-10:20 after the station operator repaired the seismometer interface box. END **************************************************************************** DATA PROBLEM REPORT IDA2013:005 2013/04/05 IDA DCC Erik Klimczak IDA PALK II BH*-00,LH*-00 2013,066,00:00:00 2013,066,00:00:00 Problem Description OTHER All channels from the KS-54000 seismometer are non-seismic as of day 2013,066-07:12 due to faulty wiring to the sensor. END PROBLEM RESOLUTION REPORT IDA2013:005 2013/12/11 IDA Erik Klimczak Description of Problem Resolution RESOLUTION All channels from the KS-54000 seismometer are restored after IDA engineers visited the station and repaired the sensor electronics. END **************************************************************************** DATA PROBLEM REPORT IDA2013:013 2013/09/06 IDA DCC Erik Klimczak IDA TLY II BH2-00,LH2-00 2013,207,00:00:00 2013,221,00:00:00 Problem Description OTHER The East-West channels from the STS-1 showed excessive background noise from days 2013,207-10:47 to 2013,221-08:30. END **************************************************************************** DATA PROBLEM REPORT IDA2013:014 2013/10/01 IDA DCC Erik Klimczak IDA OBN II BH*-00,LH*-00 2013,010,00:00:00 2013,010,00:00:00 Problem Description OTHER All seismic channels at IDA station OBN show high background noise since day 2013,010 due to building construction close to the vault. END **************************************************************************** DATA PROBLEM REPORT IDA2013:011 2013/08/15 IDA DCC Erik Klimczak IDA KAPI II BH2-10,LH2-10 2013,172,00:00:00 2013,172,00:00:00 Problem Description OTHER The East-West channels from the CMG-3T sensor are showing an anomalously low response since the power system was upgraded on 2013,172. END **************************************************************************** DATA PROBLEM REPORT IDA2013:012 2013/08/15 IDA DCC Erik Klimczak IDA NIL II BH*-00,LH*-00 2013,227,00:00:00 2013,227,00:00:00 Problem Description OTHER All channels from the KS-540000 seismometer are non-seismic as of day 2013,227-03:45 due to a damaged seismometer interface box. END PROBLEM RESOLUTION REPORT IDA2013:012 2013/09/06 IDA Erik Klimczak Description of Problem Resolution RESOLUTION All channels from the KS-54000 were restored as of day 2013,234-06:15 after the station operator repaired the seismometer interface box. END **************************************************************************** DATA PROBLEM REPORT IDA2013:010 2013/08/15 IDA DCC Erik Klimczak IDA COCO II BH*-00,LH*-00 2013,148,00:00:00 2013,148,00:00:00 Problem Description DEAD CHANNEL All channels from the KS-54000 seismometer are non-seismic as of day 2013,148-14:00 following a large channel offset. END **************************************************************************** DATA PROBLEM REPORT ASL2009:003 2009/02/06 ASL DCC Cory Gilberton ASL LVC IU 00/?H? 2009,036,22:24:00 2008,323,16:07:00 Problem Description CHANNEL ORIENTATION SEED COMMENT REFERENCE C 4625 Invalid instrument response. After a lot of trouble-shooting to get the station back up and running, there was a mix-up on one of the cable connections at the station. The result is that the components are not being displayed correctly, and there are incorrect sensitivity values as well. END **************************************************************************** DATA PROBLEM REPORT ASL2009:004 2009/05/04 ASL DCC Cory Gilberton ASL INCN IU 00/?HN 2000,159,22:12:00 2008,323,16:07:00 Problem Description OTHER SEED COMMENT REFERENCE C 4420 Channel data quality is fair. There has been some low frequency noise on the STS1 N/S component since 2000,159,22:12 that is a result of new equipment installed on the pier. END **************************************************************************** DATA PROBLEM REPORT ASL2009:001 2009/01/07 ASL DCC Tyler Stormton ASL MACI IU * 2008,214,00:00:00 2008,323,16:07:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE C 4110 Channel has small data gap. Data are very "gappy". The com link does not seem to be fast enough for the 100 and 20sps continuous data streams. END **************************************************************************** DATA PROBLEM REPORT ASL2009:002 2009/01/20 ASL DCC Cory Gilberton ASL MAJO IU 00/BHZ 2009,017,08:28:00 2008,323,16:07:00 Problem Description HIGH FREQUENCY NOISE SEED COMMENT REFERENCE S 1510 Data quality is fair. High frequency noise begins on the STS1 vertical on 2009,17. END **************************************************************************** DATA PROBLEM REPORT ANSS2009:007 2009/05/07 ANSS DCC leo ANSS MVCO US *H* 2009,126,01:26:00 2009,126,01:26:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE S 2515 Data dropouts US_MVCO 2009,126,01:16 System Restarts END **************************************************************************** DATA PROBLEM REPORT ANSS2009:006 2009/04/22 ANSS DCC leo ANSS AAM US *H* 2009,084,01:40:00 2009,084,01:40:00 Problem Description DIGITIZER PROBLEM SEED COMMENT REFERENCE S 2507 Station down. US_NATX DAS problem nodata 2009,084,01:40 END **************************************************************************** DATA PROBLEM REPORT ANSS2009:009 2009/05/26 ANSS DCC leo ANSS DBIC GT *H* 2009,111,00:00:00 2009,121,00:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE S 2501 Data unusable. GT_DCIC No data 2009,111,00:00->121,00:00 END **************************************************************************** DATA PROBLEM REPORT ANSS2009:008 2009/05/12 ANSS DCC leo ANSS REDW IW *H* 2009,112,03:17:00 2009,112,03:17:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE S 2501 Data unusable. IW_REDW 2009,112,03:17 Seismometer on stops END **************************************************************************** DATA PROBLEM REPORT IDA2014:001 2014/01/22 IDA DCC Erik Klimczak IDA PALK II BH*-00,LH*-00 2013,354,00:00:00 2013,354,00:00:00 Problem Description OTHER The BH*-00 and LH*-00 channels from the KS-54000 seismometer are showing excessive gapping caused by a faulty digitizer. A replacement digitizer is being prepared to ship to the station. END **************************************************************************** DATA PROBLEM REPORT IDA2014:002 2014/02/05 IDA DCC Erik Klimczak IDA SACV II BH2-00,LH2-00 2013,014,00:00:00 2013,014,00:00:00 Problem Description OTHER A wiring problem is causing cross-talk between the two horizontal elements of the KS-54000 seismometer. The East-West channels from the KS-54000 seismometer are showing a mixture of output from the North-South and East-West components. END **************************************************************************** DATA PROBLEM REPORT ANSS2009:003 2009/01/08 ANSS DCC leo ANSS PKME US *H* 2008,349,16:30:00 2008,349,16:30:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE S 2501 Data unusable. US_PKME Instrument on Stops' Data Unuseable Instrument UnResponsive Station Snowed in for Winter Season... END **************************************************************************** DATA PROBLEM REPORT ANSS2009:005 2009/02/03 ANSS DCC leo ANSS OGNE US *H* 2009,014,00:00:00 2009,016,16:00:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE S 2515 Data dropouts US_OGNE No Data available for 2009,014,00:00:00 -> 016,16:00:00 Data Gap. END **************************************************************************** DATA PROBLEM REPORT ANSS2009:004 2009/01/21 ANSS DCC leo ANSS MOOW IW *H* 2009,003,20:30:00 2009,008,16:34:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE S 2507 Station down. IW_MOOW No Data 2009,003->008,16:34 Station Comm down due to Weather? END **************************************************************************** DATA PROBLEM REPORT ANSS2009:018 2009/08/27 ANSS DCC Leo Sandoval ANSS CBKS US *H* 2008,146,00:00:00 2009,190,23:00:00 Problem Description OTHER SEED COMMENT REFERENCE S 2515 Data dropouts US_CBKS No Data for periods noted: 2008, 146 -> 147 2009, 019 2009, 127 -> 190 END **************************************************************************** DATA PROBLEM REPORT ANSS2009:017 2009/08/27 ANSS DCC Leo Sandoval ANSS BOZ US *H* 2008,063,00:00:00 2008,217,23:00:00 Problem Description NOISE SEED COMMENT REFERENCE S 2515 Data dropouts US_BOZ No Dat for the dates noted: 2008, 063 -> 076 2008, 207 -> 217 END **************************************************************************** DATA PROBLEM REPORT ANSS2009:019 2009/08/27 ANSS DCC Leo Sandoval ANSS ERPA US *H* 2008,182,00:00:00 2008,187,23:00:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE S 2515 Data dropouts US_ERPA No Data for : 2008, 182 -> 187 END **************************************************************************** DATA PROBLEM REPORT IDA2014:003 2014/02/14 IDA DCC Erik Klimczak IDA RPN II *** 2013,339,00:00:00 2014,044,00:00:00 Problem Description OTHER IDA station RPN was down from day 2013,339-11:40 to 2014,002-17:46 due to power problems caused by a faulty power supply. The station operator configured a temporary solution until replacing the power supply on day 2014,044 with one shipped from UCSD. END **************************************************************************** DATA PROBLEM REPORT IDA2014:004 2014/02/14 IDA DCC Erik Klimczak IDA KIV II BH1-00,LH1-00 2013,037,00:00:00 2014,026,00:00:00 Problem Description OTHER The North-South channels from the STS-1 were non-seismic from day 2013,037-19:05 to 2014,025-09:30 due to a faulty motor for the STS-1. The channels were restored after the station operator replaced the STS-1 seismometer. END **************************************************************************** DATA PROBLEM REPORT ANSS2009:014 2009/08/18 ANSS DCC leo ANSS CPUP GT *H* 2009,191,00:00:00 2009,205,00:00:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE S 2508 Data intermittant. GT_CPUP EXCESSIVE GAPS 2009,191 -> 205,00:00 END **************************************************************************** DATA PROBLEM REPORT ANSS2009:013 2009/08/18 ANSS DCC leo ANSS BMO US *H* 2008,043,00:00:00 2008,356,23:59:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE S 2515 Data dropouts US_BMO for 2008 No data avail for the following time periods: 2008,043 -> 045 2008,135 -> 153 2008,230 -> 267 2008,356 END **************************************************************************** DATA PROBLEM REPORT ANSS2009:016 2009/08/18 ANSS DCC Leo Sandoval ANSS LBTB GT *H* 2009,198,12:16:00 2009,205,00:00:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE S 2515 Data dropouts GT_LBTB Excessive Gaps 2009,198,12:16 -> 205,00:00 END **************************************************************************** DATA PROBLEM REPORT ANSS2009:015 2009/08/18 ANSS DCC Leo Sandoval ANSS DBIC GT *H* 2009,198,12:41:00 2009,205,00:00:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE S 2515 Data dropouts GT_DBIC EXCESSIVE GAPS 2009,198,12:41 ->205,00:00 END **************************************************************************** DATA PROBLEM REPORT ANSS2009:010 2009/05/28 ANSS DCC leo ANSS RLMT US *H* 2009,116,11:28:00 2009,116,11:28:00 Problem Description OTHER SEED COMMENT REFERENCE S 2501 Data unusable. US_RLMT Instrument lost capture 2009,116,11:28 Mass on stops no data avail END **************************************************************************** DATA PROBLEM REPORT ANSS2009:012 2009/08/18 ANSS DCC leo ANSS BOSA GT *H* 2009,198,12:49:00 2009,205,00:00:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE S 2515 Data dropouts GT_BOSA Excessive Gaps 2009, 198,12:49 -> 205,00:00 END **************************************************************************** DATA PROBLEM REPORT ANSS2009:011 2009/05/28 ANSS DCC leo ANSS RLMT US *H* 2009,116,11:28:00 2009,139,04:39:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 2504 Little or no data available. US_RLMT 209,116,11:28 -> 139,04:39 No Data Instrument ReLeveled 139, 04:39 END **************************************************************************** DATA PROBLEM REPORT ANSS2009:029 2009/10/08 ANSS DCC Leo Sandoval ANSS RLMT US *H* 2009,261,14:21:00 2009,280,20:16:00 Problem Description OTHER SEED COMMENT REFERENCE S 2501 Data unusable. US_RLMT Instrument on Stops 2009,261,14:21 -> 280,20:16 Data Un Useable END **************************************************************************** DATA PROBLEM REPORT ASL2008:010 2008/10/31 ASL DCC Cory Gilberton ASL KIP IU 00/?HZ 2008,298,18:27:00 2007,113,16:00:00 Problem Description OTHER The mass position on the vertical component are against their stops. Data quality is poor and unusable. END **************************************************************************** DATA PROBLEM REPORT ANSS2009:028 2009/08/31 ANSS DCC Leo Sandoval ANSS MTDJ CU *H* 2009,183,00:00:00 2009,183,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE S 2515 Data dropouts CU_MTDJ Data Dropouts from 2009,183 END **************************************************************************** DATA PROBLEM REPORT ASL2008:011 2008/10/31 ASL DCC Cory Gilberton ASL JOHN IU 00/?H? 2008,302,08:49:00 2007,113,16:00:00 Problem Description NOISE SEED COMMENT REFERENCE C 4400 Channel data quality is very poor. There was a small drop in mass position for the vertical component of the CMG which resulted in noise in the data making it basically unusable. The horizontal components have been dead since the last station visit in the fall 2007. END **************************************************************************** DATA PROBLEM REPORT ASL2008:012 2008/10/31 ASL DCC Cory Gilberton ASL KIP IU 00/?HZ 2008,298,18:27:00 2007,113,16:00:00 Problem Description OTHER SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The mass positions on the STS1 vertical have fallen against its stops. Data is unusable. END **************************************************************************** DATA PROBLEM REPORT ASL2008:013 2008/11/20 ASL DCC Cory Gilberton ASL HKT IU 00/?H? 2008,266,15:48:00 2008,323,16:07:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The STS1 is producing digitizer noise on all components: 00 ?HN started at 2008,266,15:48, ?HZ and ?HE started at 2008,306,15:57 END **************************************************************************** DATA PROBLEM REPORT ANSS2009:025 2009/08/27 ANSS DCC Leo Sandoval ANSS NATX US *H* 2008,031,00:00:00 2009,166,23:00:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE S 2515 Data dropouts US_MNTX No Data for Periods Noted: 2008, 031 -> 036 2008, 064 -> 068 2008, 071 2008, 258 2008, 294 2009, 085 -> 092 2009, 120 2009, 140 -> 166 END **************************************************************************** DATA PROBLEM REPORT ANSS2009:024 2009/08/27 ANSS DCC Leo Sandoval ANSS MSO US *H* 2008,361,00:00:00 2009,008,23:00:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE S 2515 Data dropouts US_MSO No Data for Periods Noted: 2008, 361 -> 362 2009, 003 -> 008 END **************************************************************************** DATA PROBLEM REPORT ANSS2009:027 2009/08/27 ANSS DCC Leo Sandoval ANSS OXF US *H* 2008,038,00:00:00 2009,190,23:00:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE S 2515 Data dropouts US_OXF No Data for Periods Noted: 2008, 038 -> 048 2008, 148 -> 149 2008, 151 -> 157 2008, 171 2008, 213 -> 234 2008, 264 2008, 275 2008, 364 -> 366 2009, 001 -> 004 2009, 100 2009, 146 2009, 163 -> 164 2009, 168 -> 190 END **************************************************************************** DATA PROBLEM REPORT ANSS2009:026 2009/08/27 ANSS DCC Leo Sandoval ANSS NHSC US *H* 2009,019,00:00:00 2009,190,23:00:00 Problem Description OTHER SEED COMMENT REFERENCE S 2515 Data dropouts US_NHSC No Data for Periods Noted: 2009, 019 2009, 147 END **************************************************************************** DATA PROBLEM REPORT ANSS2009:021 2009/08/27 ANSS DCC Leo Sandoval ANSS LBNH US *H* 2008,038,00:00:00 2009,022,23:00:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE S 2515 Data dropouts US_LBNH No data for periods noted: 2008, 038 -> 045 2009, 013 2009, 022 END **************************************************************************** DATA PROBLEM REPORT ANSS2009:020 2009/08/27 ANSS DCC Leo Sandoval ANSS LAO US *H* 2008,001,00:00:00 2009,161,23:00:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE S 2515 Data dropouts US_LAO No data for periods noted 2008, 001 -> 015 2008, 210 -> 211 2009, 001 -> 161 END **************************************************************************** DATA PROBLEM REPORT ANSS2009:023 2009/08/27 ANSS DCC Leo Sandoval ANSS MNTX US *H* 2008,279,00:00:00 2008,324,23:00:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE S 2515 Data dropouts US_MNTX No Data for Periods Noted: 2008, 279 -> 324 END **************************************************************************** DATA PROBLEM REPORT ANSS2009:022 2009/08/27 ANSS DCC Leo Sandoval ANSS LRAL US *H* 2008,011,00:00:00 2008,345,23:00:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE S 2515 Data dropouts US_LRAL No data for periods noted: 2008, 011 -> 021 2008, 049 -> 083 2008, 311 -> 345 END **************************************************************************** DATA PROBLEM REPORT IDA2009:025 2009/09/21 IDA DCC Erik Klimczak IDA SACV II *** 2009,209,00:00:00 2009,209,00:00:00 Problem Description OTHER IDA station SACV is having persistant power problems since day 2009,209. This is causing intermittent gaps in data acquisition. A visit by an IDA engineer to upgrade the power system is being planned. END PROBLEM RESOLUTION REPORT IDA2009:025 2010/01/28 IDA Erik Klimczak Description of Problem Resolution RESOLUTION The power problems at IDA station SACV were resolved on day 2009,343 after an IDA engineer visited the station and upgraded the power system. END **************************************************************************** DATA PROBLEM REPORT IDA2009:026 2009/09/21 IDA DCC Erik Klimczak IDA RPN II *** 2009,250,00:00:00 2009,274,00:00:00 Problem Description OTHER IDA station RPN was down from day 2009,250 to 2009,274 due to damages to power equipment caused by a lightning strike. Data acquisition was restored after the station operator replaced the power inverter. END **************************************************************************** DATA PROBLEM REPORT IDA2009:023 2009/09/21 IDA DCC Erik Klimczak IDA NNA II *** 2009,217,00:00:00 2009,231,00:00:00 Problem Description OTHER IDA station NNA was down from day 2009,217 to 2009,231 due to problems with the DAS. An IDA engineer visited the site and replaced the power supply and CPU stack for the DAS, and restored data acquisition. END **************************************************************************** DATA PROBLEM REPORT IDA2009:024 2009/09/21 IDA DCC Erik Klimczak IDA KDAK II WDO-00 2009,218,00:00:00 2009,261,00:00:00 Problem Description DEAD CHANNEL The WDO channel from the paroscientific microbarometer showed excessive spiking from day 2009,218 to 2009,261. The station operator replaced the microbarometer and the channel is back in normal operating range. END **************************************************************************** DATA PROBLEM REPORT IDA2015:014 2015/10/30 IDA DCC Erik Klimczak IDA NNA II *** 2015,274,00:00:00 2015,274,00:00:00 Problem Description OTHER IDA station NNA is down as of day 2015,274-17:30 due to damage to the AC circuit breaker box caused by a power surge. An IDA engineer is working with the station operator to obtain a new AC circuit breaker box and surge protection. END PROBLEM RESOLUTION REPORT IDA2015:014 2015/11/10 IDA Erik Klimczak Description of Problem Resolution RESOLUTION IDA station NNA is back up as of day 2015,314-18:29 after the station operator replaced the surge arrestor and circuit breaker with equipment shipped from UCSD. END **************************************************************************** DATA PROBLEM REPORT IDA2009:021 2009/07/02 IDA DCC Erik Klimczak IDA NNA II BB*-10 2009,167,00:00:00 2009,191,00:00:00 Problem Description DEAD CHANNEL All channels from the STS-2 seismometer were non-seismic from day 2009,167-14:47 to 2009,191-20:58. This was a result of testing being done to investigate excessive spiking on all horizontal channels at the station. END **************************************************************************** DATA PROBLEM REPORT IDA2009:022 2009/09/21 IDA DCC Erik Klimczak IDA ABKT II *** 2009,185,00:00:00 2009,185,00:00:00 Problem Description OTHER IDA station ABKT is down since day 2009,185 due to problems with the DAS. The station operator replaced the DAS on 2009,239 but the station remains down due to excessive reboots caused by communication problems between the DAS and ISP. END PROBLEM RESOLUTION REPORT IDA2009:022 2010/01/28 IDA Erik Klimczak Description of Problem Resolution RESOLUTION Data acquisition was restored on day 2009,339 after IDA engineers visited the station and replaced the GPS clock, and reconfigured cables in the DAS. END **************************************************************************** DATA PROBLEM REPORT ASL2008:001 2008/03/26 ASL DCC Cory Gilberton ASL XAN IC 00/?HZ 2008,056,09:28:00 2007,113,16:00:00 Problem Description DEAD CHANNEL Mass is pegged as of day 056 of 2008 at approximately 09:28. END **************************************************************************** DATA PROBLEM REPORT IDA2009:020 2009/07/02 IDA DCC Erik Klimczak IDA JTS II BB*-00 2009,174,00:00:00 2009,174,00:00:00 Problem Description DEAD CHANNEL All channels from the STS-1 seismometers are non-seismic as of day 2009,174-20:55 for reasons yet to be determined. END PROBLEM RESOLUTION REPORT IDA2009:020 2009/09/21 IDA Erik Klimczak Description of Problem Resolution RESOLUTION The broadband channels from the STS-1 seismometer were restored as of day 2009,230 after an IDA engineer visited the station and replaced the E300 seismometer electronics. END **************************************************************************** DATA PROBLEM REPORT ASL2008:002 2008/10/02 ASL DCC Tyler Stormton ASL WMQ IC 10/?HZ, 10/?HN 2008,051,08:08:00 2007,113,16:00:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4605 Channel has low sensitivity. Sensitivities for the STS-2 vertical and north/south channels are 5db low. END **************************************************************************** DATA PROBLEM REPORT ASL2008:003 2008/10/15 ASL DCC Cory Gilberton ASL BBSR IU 00/?H? 2008,265,16:22:00 2007,113,16:00:00 Problem Description OTHER SEED COMMENT REFERENCE C 4400 Channel data quality is very poor. There are numerous DC shifts and long period noise during this time frame. The following are approximate start times: ?H2 - 2008,265,16:22 ?HZ - 2008,283,19:50 ?H1 - 2008,285,02:41 Data quality is poor. END **************************************************************************** DATA PROBLEM REPORT ASL2008:004 2008/10/15 ASL DCC Cory Gilberton ASL BJT IC 00/BHZ 2007,272,08:00:00 2007,113,16:00:00 Problem Description HIGH FREQUENCY NOISE SEED COMMENT REFERENCE C 2603 Large high frequency noise. The STS1 vertical has noise at 2 Hz and higher END **************************************************************************** DATA PROBLEM REPORT ASL2008:005 2008/10/15 ASL DCC Cory Gilberton ASL WMQ IC 10/?HZ , 10/?HE 2008,051,08:08:00 2007,113,16:00:00 Problem Description OTHER SEED COMMENT REFERENCE C 4625 Invalid instrument response. There has been a sensitivity drop for the ?HZ and ?HE components of the STS2. The vertical component dropped by about 6 dB and the E/W component dropped by about 4 dB. END **************************************************************************** DATA PROBLEM REPORT ASL2008:006 2008/10/15 ASL DCC Cory Gilberton ASL GRFO IU ?H? 2008,217,00:00:00 2007,113,16:00:00 Problem Description DATA LOGGER PROBLEM The Q330 is resetting numerous times a day resulting 2.7-3.0 hour chunks of data throughout the day. END **************************************************************************** DATA PROBLEM REPORT ASL2008:007 2008/10/16 ASL DCC Cory Gilberton ASL XAN IC 00/?HZ 2008,056,09:30:00 2007,113,16:00:00 Problem Description OTHER SEED COMMENT REFERENCE C 4010 Channel is down. The STS1 vertical component has fallen against its stops. Data are not usable. END **************************************************************************** DATA PROBLEM REPORT ASL2008:008 2008/10/16 ASL DCC Cory Gilberton ASL XAN IC 10/?H? 2008,250,01:38:00 2007,113,16:00:00 Problem Description OTHER SEED COMMENT REFERENCE C 4605 Channel has low sensitivity. Following a large pulse in the data on 2008,250,01:38 all three components of STS2 show a ~5-6dB drop in sensitivity. END **************************************************************************** DATA PROBLEM REPORT IDA2009:027 2009/09/21 IDA DCC Erik Klimczak IDA KURK II *** 2009,178,00:00:00 2009,261,00:00:00 Problem Description OTHER IDA station KURK had timing issues due to problems with the DAS and GPS clock from day 2009,178 to 2009,261. The station operator replaced the GPS clock on day 2009,240 but the clock remained unlocked. A replacement DAS was sent and installed which resolved the timing issue. END **************************************************************************** DATA PROBLEM REPORT ASL2008:009 2008/10/16 ASL DCC Cory Gilberton ASL LSA IC 10/?HE 2006,105,00:00:00 2007,113,16:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The STS2 E/W component is dead. Data are unusable. END **************************************************************************** DATA PROBLEM REPORT IDA2009:028 2009/10/06 IDA DCC Erik Klimczak IDA NNA II *** 2009,273,00:00:00 2009,273,00:00:00 Problem Description OTHER IDA station NNA is down since day 2009,273-1420 due to problems with the DAS. A replacement DAS is being prepared to ship to the station. END PROBLEM RESOLUTION REPORT IDA2009:028 2010/01/28 IDA Erik Klimczak Description of Problem Resolution RESOLUTION IDA station NNA came back on-line on day 2009,303 after the station operator replaced the DAS. END **************************************************************************** DATA PROBLEM REPORT ANSS2009:030 2009/11/30 ANSS DCC Leo Sandoval ANSS EYMN US HR_HL* 2009,313,23:50:00 2009,322,22:50:00 Problem Description DATA LOGGER PROBLEM SEED COMMENT REFERENCE S 2515 Data dropouts US_EYMN No HL Data 2009,313,23:50 --. 322,22:50 END **************************************************************************** DATA PROBLEM REPORT IDA2009:014 2009/07/02 IDA DCC Erik Klimczak IDA NIL II *** 2009,123,00:00:00 2009,123,00:00:00 Problem Description OTHER IDA station NIL is down as of day 2009,123-10:26 due to damage to the DAS and ARS caused by lightning. END PROBLEM RESOLUTION REPORT IDA2009:014 2012/04/11 IDA Erik Klimczak Description of Problem Resolution RESOLUTION Data acquisition at IDA station NIL was restored on day 2012,088 after IDA engineers upgraded the station to a Quanterra Q330HR system. END **************************************************************************** DATA PROBLEM REPORT IDA2009:015 2009/07/02 IDA DCC Erik Klimczak IDA MSEY II *** 2009,123,00:00:00 2009,127,00:00:00 Problem Description OTHER IDA station MSEY was down from day 2009,123-00:37 to 2009,127-11:36 due to communication problems between the DAS and ARS. Data acquisition was restored after the station operator cycled power to the DAS. END **************************************************************************** DATA PROBLEM REPORT IDA2009:012 2009/07/02 IDA DCC Erik Klimczak IDA ASCN II *** 2009,073,00:00:00 2009,142,00:00:00 Problem Description OTHER IDA station ASCN was down from day 2009,073 to 2009,142. Data acquisition was restored after an IDA engineer visited the station and upgraded it to a Quanterra Q330HR system. END **************************************************************************** DATA PROBLEM REPORT IDA2009:013 2009/07/02 IDA DCC Erik Klimczak IDA MSEY II *** 2009,107,00:00:00 2009,111,00:00:00 Problem Description OTHER IDA station MSEY was down from day 2009,107-16:28 to 2009,111-10:38 due to problems with the DAS. Data acquisition was restored after the station operator cycled power to the DAS. END **************************************************************************** DATA PROBLEM REPORT IDA2009:010 2009/07/02 IDA DCC Erik Klimczak IDA BFO II UAN,UAE 2009,098,00:00:00 2009,098,00:00:00 Problem Description DEAD CHANNEL The UAN and UAE channels from the Askania vertical pendula are non- functional as of day 2009,098-12:07. The Askania pendula were disconnected and will be reconnected after they are relocated within the site. END **************************************************************************** DATA PROBLEM REPORT IDA2009:011 2009/07/02 IDA DCC Erik Klimczak IDA JTS II BH*-10,BL*-10 2009,112,00:00:00 2009,122,00:00:00 Problem Description DEAD CHANNEL The short period channels from the STS-2 seismometer were saturated from day 2009,112-17:36 to 2009,122-00:00. The channels were restored after an IDA engineer recentered the masses for the STS-2. END **************************************************************************** DATA PROBLEM REPORT IDA2009:018 2009/07/02 IDA DCC Erik Klimczak IDA RPN II BB*-10 2009,171,00:00:00 2009,171,00:00:00 Problem Description DEAD CHANNEL All channels from the STS-2 seismometer are non-seismic since day 2009,171 due to a faulty sensor. END PROBLEM RESOLUTION REPORT IDA2009:018 2010/03/08 IDA Erik Klimczak Description of Problem Resolution RESOLUTION The BB*10 channels are seismic as of day 2010,048-18:10, after the station operator replaced the STS-2 seismometer with one shipped from UCSD. END **************************************************************************** DATA PROBLEM REPORT IDA2009:019 2009/07/02 IDA DCC Erik Klimczak IDA JTS II *** 2009,156,00:00:00 2009,161,00:00:00 Problem Description OTHER IDA station JTS was down from day 2009,156 to 2009,161 due to communication problems between the DAS and the ISP. Data acquisition was restored after the station operator visited the station and reconfigured the uplink cables in the vault, followed by an IDA engineer cycling power to the digitizers. END **************************************************************************** DATA PROBLEM REPORT IDA2009:016 2009/07/02 IDA DCC Erik Klimczak IDA FFC II *** 2009,127,00:00:00 2009,132,00:00:00 Problem Description OTHER IDA station FFC was down from day 2009,127-20:00 to 2009,132-21:16 due to problems with the DAS and ARS. Data acquisition was restored after the station operator cycled power to the DAS and ARS. END **************************************************************************** DATA PROBLEM REPORT IDA2009:017 2009/07/02 IDA DCC Erik Klimczak IDA RPN II *** 2009,139,00:00:00 2009,171,00:00:00 Problem Description OTHER IDA station RPN was down from about day 2009,139 to 2009,156 due to a faulty power supply. The station operator reported replacing the power supply, however the station remained down due to GPS problems. The GPS clock began functioning normally again without action on day 2009,171. END **************************************************************************** DATA PROBLEM REPORT IDA2009:003 2009/03/04 IDA DCC Erik Klimczak IDA ASCN II BBN-10 2008,164,00:00:00 2008,164,00:00:00 Problem Description DEAD CHANNEL The north-south channels from the CMG3-T seismometer are non-seismic. The sensor needs to be recentered. END PROBLEM RESOLUTION REPORT IDA2009:003 2009/07/02 IDA Erik Klimczak Description of Problem Resolution RESOLUTION The north-south channels from the CMG3-T seismometer were restored on day 2009,143 after an IDA engineer visited the station and replaced the CMG-3T sensor. END **************************************************************************** DATA PROBLEM REPORT IDA2009:004 2009/03/04 IDA DCC Erik Klimczak IDA WRAB II BB*-10 2009,019,00:00:00 2009,026,00:00:00 Problem Description DEAD CHANNEL The masses for the STS-2 seismometer drifted out of normal operating range on day 2009,019. The mass position was adjusted and normal operation resumed on day 2009,026. END **************************************************************************** DATA PROBLEM REPORT IDA2009:001 2009/03/04 IDA DCC Erik Klimczak IDA OBN II BHN-10 2008,328,00:00:00 2008,355,00:00:00 Problem Description DEAD CHANNEL The North-South short period channels from the CMG3-T seismometer were saturated from about day 2008,328-18:50 to 2008,355-13:41. END **************************************************************************** DATA PROBLEM REPORT IDA2009:002 2009/03/04 IDA DCC Erik Klimczak IDA NIL II BB*-10 2009,004,00:00:00 2009,006,00:00:00 Problem Description DEAD CHANNEL The high gain short period channels from the Trillium seismometer were saturated from about day 2009,004-22:50 to 2009,006-18:00. END **************************************************************************** DATA PROBLEM REPORT IDA2009:009 2009/04/01 IDA DCC Erik Klimczak IDA OBN II BHZ-00,LHZ-00,VHZ-00 1900,000,00:00:00 1900,000,00:00:00 Problem Description Problem Description DEAD CHANNEL The vertical channels from the STS-1 seismometer were non-seismic from about day 2009,082-2010 to 2009,083-0828 due to a damaged circuit board in the DAS. END **************************************************************************** DATA PROBLEM REPORT IDA2009:007 2009/04/01 IDA DCC Erik Klimczak IDA MSVF II EN*00 2009,082,00:00:00 2009,082,00:00:00 Problem Description DEAD CHANNEL The triggered channels from the Episensor strong motion sensor are non-seismic for reasons yet to be determined. END PROBLEM RESOLUTION REPORT IDA2009:007 2011/02/18 IDA Erik Klimczak Description of Problem Resolution RESOLUTION The triggered channels from the Episensor strong motion sensor were restored on day 2010,205 after an IDA enginneer visited the station and re-installed the Episensor. END **************************************************************************** DATA PROBLEM REPORT IDA2009:008 2009/04/01 IDA DCC Erik Klimczak IDA PALK II *** 2009,081,00:00:00 2009,088,00:00:00 Problem Description OTHER IDA station PALK was down from about day 2009,081 to 2009,088 due to problems with communication between the DAS and the ISP. END **************************************************************************** DATA PROBLEM REPORT IDA2009:005 2009/03/04 IDA DCC Erik Klimczak IDA KWAJ II *** 2009,049,00:00:00 2009,057,00:00:00 Problem Description OTHER IDA station KWAJ was down from about day 2009,049 to 2009,057 due to power problems. Data acquisition resumed after the station operator reset the power inverter. END **************************************************************************** DATA PROBLEM REPORT IDA2009:006 2009/03/13 IDA DCC Erik Klimczak IDA PALK II *** 2009,039,00:00:00 2009,071,00:00:00 Problem Description OTHER IDA station PALK was down from about day 2009,039 to 2009,071 due to problems with communication between the DAS and the ISP. Data acquisition was restored after the station operator reconfigured cables at the ethernet switch. END **************************************************************************** DATA PROBLEM REPORT IDA2008:041 2008/07/24 IDA DCC Erik Klimczak IDA NIL II BH*-00,LH*-00,VH*-00 2008,010,00:00:00 2008,010,00:00:00 Problem Description DEAD CHANNEL The vertical and horizontal channels from the KS-54000 seismometer are non-seismic due to a faultly seismometer. END PROBLEM RESOLUTION REPORT IDA2008:041 2012/04/11 IDA Erik Klimczak Description of Problem Resolution RESOLUTION The vertical and horizontal channels from the KS-54000 seismometer were restored after IDA engineers upgraded the station and replaced the KS-54000 seismometer. END **************************************************************************** DATA PROBLEM REPORT ASL2010:090 2010/04/15 ASL DCC Cory Gilbert ASL PMG IU ALL CHANNELS 2010,104,00:00:00 2010,104,00:00:00 Problem Description OTHER There will be a field crew on-site for the next 8-10 days performing the Q330 upgrade. END **************************************************************************** DATA PROBLEM REPORT ASL2010:091 2010/04/15 ASL DCC Cory Gilbert ASL SNZO IU 10/?HN, 10/?HE 2010,101,09:40:33 2010,101,09:40:33 Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE C 4504 Channel exibits high levels of low frequency noise. Following a M6.9 event on 2010,101 the CMG horizontals are quite noisy above about 9 seconds. ASL field engineers are looking into it. END **************************************************************************** DATA PROBLEM REPORT ASL2010:092 2010/04/19 ASL DCC Cory Gilbert ASL HKT IU 00/?HE 2010,101,11:00:00 2010,101,11:00:00 Problem Description OTHER SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The STS-1 E/W component has fallen against its stops. END **************************************************************************** DATA PROBLEM REPORT ASL2010:093 2010/04/21 ASL DCC Cory Gilbert ASL PAB IU ALL CHANNELS 2010,111,00:00:00 2010,111,00:00:00 Problem Description OTHER There is a field crew on-site performing maintenance for the next 8-10 days. END **************************************************************************** DATA PROBLEM REPORT ASL2010:098 2010/05/03 ASL DCC Cory Gilbert ASL PASC CI ?0/?H? 2010,122,04:00:00 2010,122,04:00:00 Problem Description OTHER SEED COMMENT REFERENCE C 4527 Channel displays digitizer-related data glitches. It looks like the digitizer may be dropping out at PASC. Both components show very gappy data beginning on May 2 around 04:00 UTC. END **************************************************************************** DATA PROBLEM REPORT ASL2010:099 2010/05/03 ASL DCC Cory Gilbert ASL PAYG IU ?0/?H? 2010,118,00:00:00 2010,118,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE C 4010 Channel is down. There is a field crew currently on-site performing the Q330 upgrade. END **************************************************************************** DATA PROBLEM REPORT ASL2010:094 2010/04/21 ASL DCC Cory Gilbert ASL KBS IU 00/?HE 2010,081,10:37:50 2010,081,10:37:50 Problem Description OTHER SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The STS-1 E/W has fallen against its stops. END **************************************************************************** DATA PROBLEM REPORT ASL2010:095 2010/04/21 ASL DCC Cory Gilbert ASL HNR IU ALL CHANNELS 2010,111,00:00:00 2010,111,00:00:00 Problem Description OTHER There is a field crew on-site right now performing the Q330 upgrade. They will be there for the next 8-10 days. END **************************************************************************** DATA PROBLEM REPORT ASL2010:096 2010/04/29 ASL DCC Cory Gilbert ASL PASC CI 00/?H1 2010,103,00:00:00 2010,103,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE C 4521 Channel displays regular pulsing. This instrument has been pulsing on the ?H1 component for a little over a week now. There seems to be a period of about 1.3 hours on the pulses. END **************************************************************************** DATA PROBLEM REPORT ASL2010:097 2010/04/30 ASL DCC Cory Gilbert ASL TARA IU 00/?H? 2009,317,12:00:00 2009,317,12:00:00 Problem Description NOISE SEED COMMENT REFERENCE C 4400 Channel data quality is very poor. All three components are very noisy and almost unusable. END **************************************************************************** DATA PROBLEM REPORT ASL2010:069 2010/03/25 ASL DCC Cory Gilbert ASL HNR IU 00/?HZ,00/?H1 2008,142,00:00:00 2008,142,00:00:00 Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE C 4400 Channel data quality is very poor. The vertical and ?H1 components of the 54000 are basically unusable as of now. Both have been suspect since the winter, but have had periods where at least some of the data was usable at times. The instrument will need to be replace on the next scheduled station visit. END **************************************************************************** DATA PROBLEM REPORT IDA2010:040 2010/10/22 IDA DCC Erik Klimczak IDA MBAR II *** 2010,217,00:00:00 2010,217,00:00:00 Problem Description OTHER There have been ongoing problems with the VSAT telemetry link to MBAR since day 2010,217 (Aug. 5,2010). A replacement satellite modem was configured and shipped to the station. The station operator is currently planning a station visit to replace the satellite modem. END **************************************************************************** DATA PROBLEM REPORT ASL2007:052 2007/03/02 ASL DCC Valerie Peyton ASL BJT IC EHZ SHZ 1994,145,00:00:00 1994,231,05:13:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The GS13 Z component at BJT is dead during this time. Data are not useable. END **************************************************************************** DATA PROBLEM REPORT ASL2007:053 2007/03/02 ASL DCC Valerie Peyton ASL BJT IC EHN SHN 1994,231,05:09:00 1994,235,05:32:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The BJT GS13 N component is dead during this time. Data are not useable. END **************************************************************************** DATA PROBLEM REPORT ASL2007:050 2007/03/02 ASL DCC Valerie Peyton ASL BJT IC */* 1994,342,02:03:00 1994,343,07:15:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. BJT was undergoing station maintenance during this time. Expect variable data quality and availability, as well as calibrations and other tests. END **************************************************************************** DATA PROBLEM REPORT IDA2008:069 2008/12/29 IDA DCC Erik Klimczak IDA SACV II *** 2008,294,00:00:00 2008,329,00:00:00 Problem Description OTHER IDA station SACV was down from about day 2008,294 to 2008,329 due to power problems and a faulty GPS clock. Data acquisition resumed after the station operator restored power and replaced the GPS clock. END **************************************************************************** DATA PROBLEM REPORT ASL2007:051 2007/03/02 ASL DCC Valerie Peyton ASL BJT IC */* 1994,242,04:25:00 1994,242,06:35:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. BJT was undergoing station maintenance during this time. Expect variable data quality and availability, as well as calibrations and other tests. END **************************************************************************** DATA PROBLEM REPORT ASL2010:060 2010/03/24 ASL DCC Cory Gilbert ASL QIZ IC 00/?H? 2007,100,00:00:00 2007,100,00:00:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4630 Response may be invalid. There is a probable gain issue on the STS-2, but we can't tell for sure without a sensorloc analysis. END **************************************************************************** DATA PROBLEM REPORT IDA2008:068 2008/12/29 IDA DCC Erik Klimczak IDA PFO II LN*00,EN*00 2008,142,00:00:00 2008,339,00:00:00 Problem Description DEAD CHANNEL The vertical and horizontal channels from the Episensor accelerometer were non-seismic due to a faulty sensor. The channels were restored after an IDA engineer visited the station and replaced the sensor. END **************************************************************************** DATA PROBLEM REPORT ASL2007:056 2007/03/02 ASL DCC Valerie Peyton ASL BJT IC EH? SH? 1994,145,00:00:00 1994,343,03:00:00 Problem Description OTHER The BJT GS13 instruments went through several sensitivity changes in the first 199 days of operation. All of these sensitivity changes have been documented in the IC/BJT dataless volume. Though we have no field documentation to explain the changes, nor records of the GS13 instrument sensitivities or amplifier settings, it appears that the following may have occurred: 1994,145,00:00:00 The original GS13 amplifiers were set to a non-standard attenuation setting. These original amplifiers also had a non-standard amplifier board. 1994,242,05:00:00 Attenuation on the GS13 amplifiers was increased by 12dB. 1994,245,01:26:00 Attenuation on the GS13 amplifiers was decreased by 6dB. 1994,342,02:03:00 The standard GS13 amplifier board was installed. 1994,343,03:00:00 Attenuation on the GS13 amplifiers was changed; we are assuming it was set to the standard switch position of 6.4. Assuming that all the GS13 amplifiers were set to a sensitivity of 6.4 at 1994, 343, 03:00, we calculated the GS13 instruments themselves to have the following sensitivities: Z = 1289.1 N = 1250 E = 1171.9 These values are quite low, considering the nominal GS13 sensitivity is 1500. However, we were not able to determine what the final amplifier setting was for the BJG GS13 instruments. In the absence of that information, we chose to assume that the final amplifier setting was the standard setting of 6.4 used at all of our other stations. We then determined the total sensitivity (stage 99) needed for each GS13 epoch in order to match the background noise PSDs for the GS13s and the STS1s at BJT. From there we were able to use the assumed amplification of 6.4, the known digitizer sensitivity, and the empirically derived total sensitivity to back out the rest of the piece of the sensitivity cascade. If we find the assumption of an amplifier gain of 6.4 to be in error, we will modify the sensitivity cascade accordingly. In the meantime, the IC/BJT GS13 dataless information is correct to the best of our knowledge. END **************************************************************************** DATA PROBLEM REPORT IDA2008:067 2008/12/29 IDA DCC Erik Klimczak IDA RPN II BBN-00 2008,304,00:00:00 2008,304,00:00:00 Problem Description DEAD CHANNEL The North-South channels from the STS-1 seismometer are non-seismic as of about day 2008,304 for reasons yet to be determined. A faulty sensor is suspected. END **************************************************************************** DATA PROBLEM REPORT ASL2007:057 2007/03/05 ASL DCC Valerie Peyton ASL KEV IU 10/*HN 2007,064,18:47:00 2007,064,21:43:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4625 Invalid instrument response. The KEV CMG3-T N component appears to have lost over half of its double-ended output. The response is ~30dB too low. END **************************************************************************** DATA PROBLEM REPORT IDA2008:066 2008/12/29 IDA DCC Erik Klimczak IDA RPN II BB*00,LN*00,EN*00 2008,304,00:00:00 2008,304,00:00:00 Problem Description Problem Description DEAD CHANNEL The horizontal and vertical channels from the STS-1 and FBA-23 sensors were non-seismic from about day 2008,304-10:56 to 2008,305-11:00 due to problems with the sensors. Normal data acquisition has resumed for all except the North- South channels from the STS-1. END **************************************************************************** DATA PROBLEM REPORT ASL2007:054 2007/03/02 ASL DCC Valerie Peyton ASL BJT IC BHN LHN UHN VHN BHZ LHZ UHZ VHZ 1994,343,02:20:00 1994,343,07:21:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The N and Z components of the BJT STS1 are dead during this time. END **************************************************************************** DATA PROBLEM REPORT IDA2008:065 2008/12/29 IDA DCC Erik Klimczak IDA NIL II *** 2008,308,00:00:00 2008,312,00:00:00 Problem Description OTHER IDA station NIL was down from about day 2008,308 to 2008,312 due to damage to a cable between the ARS and the DAS caused by construction near the station. END **************************************************************************** DATA PROBLEM REPORT ASL2007:055 2007/03/02 ASL DCC Valerie Peyton ASL BJT IC BHE LHE UHE VHE 1994,343,02:20:00 1994,347,08:09:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The BJT STS1 E component is dead during this time period. END **************************************************************************** DATA PROBLEM REPORT IDA2008:064 2008/12/29 IDA DCC Erik Klimczak IDA CMLA II *** 2008,300,00:00:00 2008,361,00:00:00 Problem Description OTHER IDA station CMLA was down due to problems with the DAS. The station came back online after a replacement DAS shipped to the station was installed by the station operator. END **************************************************************************** DATA PROBLEM REPORT ASL2010:065 2010/03/25 ASL DCC Cory Gilbert ASL KMBO IU 10/?H? 2010,079,00:00:00 2010,079,00:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. After a short gap in the data, all components of the STS-2 are producing only digitizer noise. END **************************************************************************** DATA PROBLEM REPORT ASL2010:066 2010/03/25 ASL DCC Cory Gilbert ASL KMBO IU 00/?HN 2010,018,13:00:00 2010,018,13:00:00 Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE C 4400 Channel data quality is very poor. There was a large pulse on all sensors around 13:00 UTC. Everything came back ok except for the N/S, which seems to be stuck in a ~180 sine wave of varying amplitude. END **************************************************************************** DATA PROBLEM REPORT ASL2007:058 2007/03/08 ASL DCC Valerie Peyton ASL KEV IU 10/*HN 2007,066,15:56:00 2007,067,19:07:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4625 Invalid instrument response. The KEV CMG3-T N component appears to have lost over half of its double-ended output. The response is ~30dB too low. END **************************************************************************** DATA PROBLEM REPORT ASL2010:067 2010/03/25 ASL DCC Cory Gilbert ASL ANTO IU 10/?N? 2006,111,00:00:00 2006,111,00:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The FBA at ANTO has not detected an event since 2006,111. I checked several event large events every year between then and now. END **************************************************************************** DATA PROBLEM REPORT ASL2007:059 2007/03/09 ASL DCC Valerie Peyton ASL HIA IC */* 2007,030,05:24:00 2007,103,08:17:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 454 Timing MAY be in error, as GPS system is not operating consistently. The timing system at HIA is reporting an inaccurate state of health. Timing quality cannot be guaranteed. END **************************************************************************** DATA PROBLEM REPORT ASL2010:068 2010/03/25 ASL DCC Cory Gilbert ASL CHTO IU 00/?H1,00/?H2 2009,280,00:00:00 2009,280,00:00:00 Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE C 4521 Channel displays regular pulsing. The 54000 horizontals go through period of really nasty pulsing. It has happened several times in the last few years. We are not sure about what is causing it, but it seems to go away on its own. Currently, the pulsing is not as bad as it was in October, but it is still present. END **************************************************************************** DATA PROBLEM REPORT ASL2010:061 2010/03/25 ASL DCC Cory Gilbert ASL DAV IU 00/?H? 1997,111,00:00:00 1997,111,00:00:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4625 Invalid instrument response. This instrument haas an amplitude dependent lowered response at longer periods. The effect is non-linear and is greater as the ground motion amplitude increases. Most likely this problem was caused by moisture in the feedback electronics box or the seismometer enclosure. The problem most like has become worse over time. Although we recognize this problem we do not have a good way to describe it in the dataless SEED at this time, but we are working on it. This problem gets worse through the years with the E/W component always being the worst, followed by the N/S then the vertical END **************************************************************************** DATA PROBLEM REPORT ASL2010:062 2010/03/25 ASL DCC Cory Gilbert ASL ULN IU 00/?H? 2004,100,00:00:00 2004,100,00:00:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4625 Invalid instrument response. This instrument has a potential amplitude dependent lowered response at longer periods on the horizontal components. The effect is non-linear and is greater as the ground motion amplitude increases. Most likely this problem was caused by moisture in the feedback electronics box or the seismometer enclosure. The problem most like has become worse over time. Although we recognize this problem we do not have a good way to describe it in the dataless SEED at this time, but we are working on it. END **************************************************************************** DATA PROBLEM REPORT ASL2010:063 2010/03/25 ASL DCC Cory Gilbert ASL GNI IU 00/?HN, 00/?HE 2005,100,00:00:00 2005,100,00:00:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4625 Invalid instrument response. This instrument has a potential amplitude dependent lowered response at longer periods on the horizontal components. The effect is non-linear and is greater as the ground motion amplitude increases. Most likely this problem was caused by moisture in the feedback electronics box or the seismometer enclosure. The problem most like has become worse over time. Although we recognize this problem we do not have a good way to describe it in the dataless SEED at this time, but we are working on it. END **************************************************************************** DATA PROBLEM REPORT ASL2010:064 2010/03/25 ASL DCC Cory Gilbert ASL KMBO IU 00/?HN 2007,001,00:00:00 2007,001,00:00:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4625 Invalid instrument response. This instrument has a potential amplitude dependent lowered response at longer periods on the. The effect is non-linear and is greater asthe ground motion amplitude increases. Most likely this problem was caused by moisture in the feedback electronics box or the seismometer enclosure. The problem most like has become worse over time. Although we recognize this problem we do not have a good way to describe it in the dataless SEED at this time, but we are working on it. END **************************************************************************** DATA PROBLEM REPORT ASL2010:058 2010/03/24 ASL DCC Cory Gilbert ASL LSA IC 20/?NN 2009,223,00:00:00 2009,223,00:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The N/S component of the FBA has been down since August of 2009. END **************************************************************************** DATA PROBLEM REPORT ASL2010:059 2010/03/24 ASL DCC Cory Gilbert ASL LSA IC 00/?HN, 10/?HN 2009,190,00:00:00 2009,190,00:00:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4605 Channel has low sensitivity. There is a sensitivity difference on N/S component between the primary and secondary sensors. It's difficult to determine which one is the culprit without performing a sensorloc analysis. END **************************************************************************** DATA PROBLEM REPORT ASL2007:041 2007/02/12 ASL DCC Valerie Peyton ASL KONO IU 10/*H* 2006,349,22:20:00 2007,044,16:37:00 Problem Description HIGH FREQUENCY NOISE SEED COMMENT REFERENCE C 4508 Channel has high levels of high frequency noise. KONO CMG3-T data contain high-frequency noise (2hz and higher). END **************************************************************************** DATA PROBLEM REPORT ASL2007:042 2007/02/13 ASL DCC Valerie Peyton ASL QSPA IU 10/*H* 2007,044,08:23:00 2007,044,17:37:00 Problem Description OTHER SEED COMMENT REFERENCE C 1840 Calibration data Calibrations were run on the QSPA CMG3-T-B instrument during this time frame. Data are not useful for earthquake analysis. END **************************************************************************** DATA PROBLEM REPORT ASL2007:040 2007/02/09 ASL DCC Valerie Peyton ASL MBWA IU */* 2007,040,00:00:00 2007,044,16:37:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. An ASL field team is at MBWA for station maintenance. Expect variable data quality and availability, as well as calibrations and other tests. END **************************************************************************** DATA PROBLEM REPORT ASL2007:045 2007/02/16 ASL DCC Valerie Peyton ASL QSPA IU 20/*H* 2007,045,07:52:00 2007,045,17:06:00 Problem Description OTHER SEED COMMENT REFERENCE C 1840 Calibration data Calibrations were run on the QSPA STS2 instrument during this time frame. Data are not useful for earthquake analysis. END **************************************************************************** DATA PROBLEM REPORT ASL2007:046 2007/02/19 ASL DCC Valerie Peyton ASL QSPA IU 20/*H* 2007,047,21:17:00 2007,051,14:28:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. All three components of the QSPA STS2 have fallen against their stops. Data are not useable. END **************************************************************************** DATA PROBLEM REPORT ASL2007:043 2007/02/15 ASL DCC Valerie Peyton ASL TRQA IU 00/*H* 10/*H* 2007,045,18:18:00 2007,059,09:46:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. Both TRQA seismometers are completely dead. END **************************************************************************** DATA PROBLEM REPORT ASL2007:044 2007/02/15 ASL DCC Valerie Peyton ASL TRQA IU 00/LDO 2007,045,18:39:00 2007,059,18:20:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The TRQA Parscientific microbarograph is dead. END **************************************************************************** DATA PROBLEM REPORT ASL2007:049 2007/02/27 ASL DCC Valerie Peyton ASL QSPA IU 50/*H* 2007,054,17:15:00 2007,054,18:19:00 Problem Description OTHER SEED COMMENT REFERENCE C 1840 Calibration data Calibrations were run on the QSPA cold borehole Guralp instrument during this time frame. Data are not useful for earthquake analysis. END **************************************************************************** DATA PROBLEM REPORT ASL2010:054 2010/03/24 ASL DCC Cory Gilbert ASL TEIG IU 20/?N? 2009,100,00:00:00 2009,100,00:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The N/S component of the FBA is dead, and the other two components both look like their sensitivities are elevated. All of these problems seem to go back into mid-2009, but it's tough to pin-point the exact dates. END **************************************************************************** DATA PROBLEM REPORT ASL2010:055 2010/03/24 ASL DCC Cory Gilbert ASL ENH IC 10/?H? 2009,320,00:00:00 2009,320,00:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4050 Channel not recording seismic data. The STS-2 has issues on all three components. The vertical component has massive long period noise. The horizontals are essentially dead. At first I thought it was a mass position issue, but has turned out to be something different altogether. A new sensor is en route. END **************************************************************************** DATA PROBLEM REPORT ASL2007:047 2007/02/21 ASL DCC Valerie Peyton ASL QSPA IU 20/*HN 2007,051,14:28:00 2007,052,17:19:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The N component of the QSPA STS2 has fallen against its stop. Data are not useable. END **************************************************************************** DATA PROBLEM REPORT ASL2010:056 2010/03/24 ASL DCC Cory Gilbert ASL ENH IC 20/?N? 2009,223,00:00:00 2009,223,00:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The FBA data has been down since August of 2009. END **************************************************************************** DATA PROBLEM REPORT ASL2007:048 2007/02/21 ASL DCC Valerie Peyton ASL QSPA IU 30/*H* 2007,052,07:44:00 2007,052,18:18:00 Problem Description OTHER SEED COMMENT REFERENCE C 1840 Calibration data Calibrations were run on the QSPA STS1 Z instrument during this time frame. Data are not useful for earthquake analysis. END **************************************************************************** DATA PROBLEM REPORT ASL2010:057 2010/03/24 ASL DCC Cory Gilbert ASL HIA IC 20/?N? 2009,223,00:00:00 2009,223,00:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The FBA has been down since August of 2009. END **************************************************************************** DATA PROBLEM REPORT ASL2010:050 2010/03/22 ASL DCC Cory Gilbert ASL DWPF IU ALL COMPONENTS 2009,264,00:00:00 2009,264,00:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE S 10 Station is down. The 54000 at DWPF is lost. It is producing only digitizer noise. END **************************************************************************** DATA PROBLEM REPORT ASL2010:051 2010/03/23 ASL DCC Cory Gilbert ASL COLA IU 20/?N1 2010,001,00:00:00 2010,001,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE C 4410 Channel data quality is poor. The E/W component of the episensor has developed a high level of noise, that in the case of the Chilean event, is basically burying the event signal. It's difficult to determine exactly when it started, but it was good late last year. END **************************************************************************** DATA PROBLEM REPORT ASL2010:052 2010/03/23 ASL DCC Cory Gilbert ASL FURI IU 20/?NE 2009,250,00:00:00 2009,250,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE C 4605 Channel has low sensitivity. The E/W component of the episensor displays a lowered response during the Chilean event. I see this back in the mid-2009. The other components look fine however. END **************************************************************************** DATA PROBLEM REPORT ASL2010:053 2010/03/23 ASL DCC Cory Gilbert ASL LSZ IU 10/?H? 2008,343,00:00:00 2008,343,00:00:00 Problem Description CHANNEL ORIENTATION SEED COMMENT REFERENCE C 1826 Instrument orientation is unknown. Upon first look during the Chilean event, it appears the STS-2 has been moved somehow off it's original orientation by as much as 40%. We are still investigating, and are not completely sure that the instrument has been moved, but for now everything points in that direction. END **************************************************************************** DATA PROBLEM REPORT ASL2010:080 2010/03/26 ASL DCC Cory Gilbert ASL SSE IC 10/?H? 2008,261,00:00:00 2008,261,00:00:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4625 Invalid instrument response. The STS2 sensitivity is low as of 09/18/2008. The vertical component is the certainly the worst of the three, but the horizontals are low as well. END **************************************************************************** DATA PROBLEM REPORT ASL2010:081 2010/04/05 ASL DCC Cory Gilbert ASL SSPA IU 10/?H? 2010,091,00:00:00 2010,091,00:00:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The instrument response over the M7.2 event on Easter is wrong. After some investigation, I determined that the instrument is close to being against its stops, causing the instrument to clip. It needs to be re-centered. END **************************************************************************** DATA PROBLEM REPORT ASL2010:082 2010/04/05 ASL DCC Cory Gilbert ASL TEIG IU 10/?H? 2010,093,03:15:31 2010,093,03:15:31 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. As of 2010,093 the CMG is producing only digitizer noise. I checked the mass positions and they seem to be ok, so I think something else is going on. END **************************************************************************** DATA PROBLEM REPORT ASL2010:087 2010/04/13 ASL DCC Cory Gilbert ASL KMBO IU ALL CHANNELS 2010,102,00:00:00 2010,102,00:00:00 Problem Description OTHER There is a field crew on-site for the next 8-10 days performing the Q330 upgrade. END **************************************************************************** DATA PROBLEM REPORT ASL2007:038 2007/02/08 ASL DCC Valerie Peyton ASL QSPA IU 00/*H* 20/*H* 2007,039,08:53:00 2007,039,21:27:00 Problem Description OTHER SEED COMMENT REFERENCE C 1840 Calibration data Calibrations were run on the QSPA 54000 and STS2 instruments during this time frame. Data are not useful for earthquake analysis. Please note that the only reason we see a calibration signal on the STS2 at this time is because of cross-talk somewhere in the system. The STS2 was not intentionally calibrated, which means that the calibration signal observed on the STS2 channels cannot be used for instrument analysis. END **************************************************************************** DATA PROBLEM REPORT ASL2010:088 2010/04/13 ASL DCC Cory Gilbert ASL SJG IU ALL CHANNELS 2010,103,00:00:00 2010,103,00:00:00 Problem Description OTHER There is a field crew on-site for the next 8-10 days performing the Q330 upgrade. END **************************************************************************** DATA PROBLEM REPORT ASL2007:039 2007/02/09 ASL DCC Valerie Peyton ASL MBWA IU 10/*HZ 2007,040,06:40:00 2007,042,01:48:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. ASL field engineers are on site at MBWA for station maintenance. They have removed the CMG3-T-B from the hole to replace it. END **************************************************************************** DATA PROBLEM REPORT ASL2010:089 2010/04/14 ASL DCC Cory Gilbert ASL KMI IC 10/?HE 2008,133,06:00:00 2008,133,06:00:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4605 Channel has low sensitivity. After a large event on 2008,133,06:00 the E/W component of the STS-2 shows a large loss in sensitivity. It looks to be around 3-4 dB. END **************************************************************************** DATA PROBLEM REPORT ASL2007:037 2007/02/07 ASL DCC Valerie Peyton ASL HKT IU */* 2007,036,00:00:00 2007,036,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. An ASL field engineer is on site at HKT for station maintenance. Expect variable data quality and availability, as well as calibrations and other tests. END **************************************************************************** DATA PROBLEM REPORT ASL2010:083 2010/04/08 ASL DCC Tyler Storm ASL PMG IU 10/?HZ 2008,132,00:00:00 2009,160,00:00:00 Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE C 4521 Channel displays regular pulsing. Low-frequency pulses increased the background noise level during this time frame. END **************************************************************************** DATA PROBLEM REPORT ASL2010:084 2010/04/08 ASL DCC Tyler Storm ASL PMG IU 00/?HN 2009,154,00:00:00 2009,197,00:00:00 Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE C 4521 Channel displays regular pulsing. Low-frequency pulses increased the background noise level during this time frame. END **************************************************************************** DATA PROBLEM REPORT ASL2010:085 2010/04/08 ASL DCC Tyler Storm ASL AFI IU ??/*H* 2010,054,00:00:00 2010,054,00:00:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4625 Invalid instrument response. Current sensitivities are in error. We are waiting for the SensOrLoc data (in a return shipment) in order to make the sensitivity adjustments. These data could not be transferred in the field due to technical difficulties. END **************************************************************************** DATA PROBLEM REPORT ASL2010:086 2010/04/08 ASL DCC Tyler Storm ASL PAYG IU 00/?H1, 00/?H2 2008,001,00:00:00 2008,001,00:00:00 Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE C 4509 Channel has elevated low frequency noise levels. Low-frequency pulses increased the background noise level during this time frame. END **************************************************************************** DATA PROBLEM REPORT IDA2008:063 2008/12/29 IDA DCC Erik Klimczak IDA KAPI II BHN-00,LHN-00,VHN-00 1900,000,00:00:00 1900,000,00:00:00 Problem Description Problem Description OTHER The North-South channels from the KS-54000 seismometer were showing excessive spiking from about day 2008,312 to 2008,338 due to a faulty circuit board in the DAS. The channels were restored after an IDA engineer repaired a KS-54000 cable and termination box. END **************************************************************************** DATA PROBLEM REPORT IDA2008:062 2008/12/29 IDA DCC Erik Klimczak IDA KAPI II *** 2008,297,00:00:00 2008,303,00:00:00 Problem Description OTHER IDA station KAPI was down from about day 2008,297 to 2008,303 due to communication problems between the DAS and the ISP. Data acquisition resumed after power was cycled to the DAS. END **************************************************************************** DATA PROBLEM REPORT IDA2008:061 2008/12/29 IDA DCC Erik Klimczak IDA KWAJ II *** 2008,291,00:00:00 2008,303,00:00:00 Problem Description OTHER IDA station KWAJ was down from about day 2008,291 to 2008,303 due to communication problems between the DAS and the ISP. Data acquisition was restored after the station operator cycled power to the DAS. END **************************************************************************** DATA PROBLEM REPORT IDA2008:060 2008/12/29 IDA DCC Erik Klimczak IDA PALK II *** 2008,313,00:00:00 2008,313,00:00:00 Problem Description OTHER IDA station PALK is down since about day 2008,313 due to problems with the DAS. END **************************************************************************** DATA PROBLEM REPORT IDA2008:059 2008/12/29 IDA DCC Erik Klimczak IDA PALK II BHZ-10,BH1-10,BL1-10 1900,000,00:00:00 1900,000,00:00:00 Problem Description Problem Description DEAD CHANNEL The BHZ-10 and B*1-10 channels from the CMG-3T seismometer have drifted out of normal operating range. END **************************************************************************** DATA PROBLEM REPORT ASL2010:070 2010/03/25 ASL DCC Cory Gilbert ASL LVC IU 20/HN? 2010,058,00:00:00 2010,058,00:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The episensor did not trigger on the Chilean event. However it did trigger on a few events last year. The first was a M8.1 event at 95.8 arc degrees away. The second was a M6.6 event at 3.6 arc degrees away. By comparison, the Chilean event from earlier this year was a M8.8 at 13.8 arc degrees away. END **************************************************************************** DATA PROBLEM REPORT ASL2010:071 2010/03/25 ASL DCC Cory Gilbert ASL OTAV IU 20/HN? 2010,058,00:00:00 2010,058,00:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The episensor did not trigger on the Chilean event from earlier this year. I went back and checked a few large events from last year, and it didn't trigger then either. However, the Chilean event caused the STS-2 instrument to clip. I would've expected the episensor to trigger in this instance. END **************************************************************************** DATA PROBLEM REPORT ASL2010:076 2010/03/25 ASL DCC Cory Gilbert ASL TEIG IU 00/?H1 2006,340,00:00:00 2006,340,00:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The ?H1 component of the 36000 is down as of 2006,340. END **************************************************************************** DATA PROBLEM REPORT ASL2010:077 2010/03/25 ASL DCC Cory Gilbert ASL WCI IU 00/?HZ 2009,209,00:00:00 2009,209,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE C 4625 Invalid instrument response. This instrument has a probable amplitude dependent lowered response at longer periods. The effect is non-linear and is greater as the ground motion amplitude increases. Most likely this problem was caused by moisture in the feedback electronics box or the seismometer enclosure. The problem has most likely becomeworse over time. Although we recognize this problem we do not have a good way to describe it in the dataless SEED at this time, but we are working on it. END **************************************************************************** DATA PROBLEM REPORT ASL2010:078 2010/03/26 ASL DCC Cory Gilbert ASL PASC CI 00/?HN 2010,058,00:00:00 2010,058,00:00:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4625 Invalid instrument response. The N/S component of the STS-1 has a potential problem with moisture in the components. Further analysis is needed to determine exactly when the problem started, but it was quite evident during the Chilean event. We will continue to investigate and update as necessary. END **************************************************************************** DATA PROBLEM REPORT ASL2010:079 2010/03/26 ASL DCC Cory Gilbert ASL BJT IC 00/BHZ 2007,272,00:00:00 2007,272,00:00:00 Problem Description HIGH FREQUENCY NOISE SEED COMMENT REFERENCE C 4508 Channel has high levels of high frequency noise. The vertical component has high frequency noise above 2Hz END **************************************************************************** DATA PROBLEM REPORT ASL2010:072 2010/03/25 ASL DCC Cory Gilbert ASL RCBR IU 20/?N? 2010,058,00:00:00 2010,058,00:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The episensor did not trigger on the Chilean event from earlier this year. I went back and checked a few large events from last year, and it didn't trigger then either. However, the Chilean event caused the STS-2 instrument to clip. I would've expected the episensor to trigger in this instance. END **************************************************************************** DATA PROBLEM REPORT ASL2010:073 2010/03/25 ASL DCC Cory Gilbert ASL SAML IU 20/HN? 2010,058,00:00:00 2010,058,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE C 4010 Channel is down. The episensor did not trigger on the Chilean event from earlier this year. I could not go back and check events from last year because the station did not come up till late in the year. However, the Chilean event caused the STS-2 instrument to clip. I would've expected the episensor to trigger in this instance. END **************************************************************************** DATA PROBLEM REPORT ASL2010:074 2010/03/25 ASL DCC Cory Gilbert ASL SDV IU 20/HN? 2010,058,00:00:00 2010,058,00:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The episensor did not trigger on the Chilean event from earlier this year. I could not go back and check events from last year because the station did not come up till early this year. However, the Chilean event caused the STS-2 instrument to clip. I would've expected the episensor to trigger in this instance. END **************************************************************************** DATA PROBLEM REPORT ASL2010:075 2010/03/25 ASL DCC Cory Gilbert ASL KIP IU 00/?HN,00/?HE 2007,300,00:00:00 2007,300,00:00:00 Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE C 4521 Channel displays regular pulsing. Beginning in late 2007, there are some pulses showing up randomly in the data from the horizontal components of the primary sensor. They have grown worse over time and are affecting the background noise level of the station, however there doesn't seem to be any kind of noticable period to them, making them difficult to describe. We believe there is moisture in the system somewhere, hopefully and once the station gets upgraded the pulsing will go away. END **************************************************************************** DATA PROBLEM REPORT ASL2010:029 2010/01/25 ASL DCC Cory Gilbert ASL TUC IU ALL CHANNELS 2009,148,19:00:00 2006,181,00:00:00 Problem Description OTHER This station has been upgraded to a Q330 digitizer. New metadata are available. An Episensor was installed in place of the FBA. A CMG was installed in addition to the pre-existing STS-1. END **************************************************************************** DATA PROBLEM REPORT IDA2010:003 2010/01/28 IDA DCC Erik Klimczak IDA NNA II *** 2009,331,00:00:00 2009,335,00:00:00 Problem Description OTHER IDA station NNA was down from day 2009,331-01:14 to 2009,335-21:36 due to problems with the DAS. The station came back on-line after the station operator reconnected a cable from the digitizer to a switch onsite. END **************************************************************************** DATA PROBLEM REPORT IDA2010:004 2010/01/28 IDA DCC Erik Klimczak IDA TAU II *** 2009,321,00:00:00 2009,330,00:00:00 Problem Description OTHER IDA station TAU was down from day 2009,321-10:27 to 2009,330-19:25 due to problems with the station computer. The station came back on-line after the station operator replaced the station computer. END **************************************************************************** DATA PROBLEM REPORT IDA2010:005 2010/01/28 IDA DCC Erik Klimczak IDA MSVF II *** 2009,335,00:00:00 2009,335,00:00:00 Problem Description OTHER IDA station MSVF has been down intermittently from day 2009,335 to 2009,341, 2009,348 to 2010,010, and day 2010,021 to present due to power problems at the station. The GPS clock at the station has also been intermittently unlocked. END PROBLEM RESOLUTION REPORT IDA2010:005 2012/05/15 IDA Erik Klimczak Description of Problem Resolution RESOLUTION An IDA engineer visited the station on 2010,205 and resolved the ongoing power problems by replacing the System back-up and UPS batteries, and reconfiguring the settings for the UPS. END **************************************************************************** DATA PROBLEM REPORT IDA2010:006 2010/01/28 IDA DCC Erik Klimczak IDA CMLA II *** 2009,361,00:00:00 2009,361,00:00:00 Problem Description OTHER IDA station CMLA is down as of day 2009,361 due to problems with the DAS. A new MK8 DAS and GPS clock are being shipped to the station. END PROBLEM RESOLUTION REPORT IDA2010:006 2011/02/04 IDA Erik Klimczak Description of Problem Resolution RESOLUTION IDA station CMLA is back on-line as of day 2010,295 after an IDA engineer visited the station and restored data acquisition. However, all channels from the CMG-3T seismometer remain non-seismic due to a faulty CMG-3T sensor. END **************************************************************************** DATA PROBLEM REPORT ASL2010:025 2010/01/25 ASL DCC Cory Gilbert ASL TARA IU ALL CHANNELS 2009,317,00:10:27 2006,181,00:00:00 Problem Description OTHER This station has been upgraded to a Q330 digitizer. New metadata are available. An Episensor was installed in place of the FBA. The primary STS-2-HG was replaced with another STS-2-HG. END **************************************************************************** DATA PROBLEM REPORT ASL2010:026 2010/01/25 ASL DCC Cory Gilbert ASL TATO IU ALL CHANNELS 2009,265,13:56:41 2006,181,00:00:00 Problem Description OTHER This station has been upgraded to a Q330 digitizer. New metadata are available. An Episensor was installed in place of the FBA. An STS-2-SG was installed in place of the previous STS-2. END **************************************************************************** DATA PROBLEM REPORT ASL2010:027 2010/01/25 ASL DCC Cory Gilbert ASL TRQA IU ALL CHANNELS 2009,139,20:00:00 2006,181,00:00:00 Problem Description OTHER This station has been upgraded to a Q330 digitizer. New metadata are available. An Episensor was installed in place of the FBA. The existing CMG was replaced with another CMG. END **************************************************************************** DATA PROBLEM REPORT IDA2010:001 2010/01/28 IDA DCC Erik Klimczak IDA ERM II *** 2009,281,00:00:00 2009,301,00:00:00 Problem Description OTHER IDA station ERM was down from day 2009,281-10:59 to 2009,301-18:51 due to a power outage caused by a typhoon. The station came back on-line after the station operator visited the station and restored power, and an IDA engineer cycled power to the DAS and ARS. END **************************************************************************** DATA PROBLEM REPORT ASL2010:028 2010/01/25 ASL DCC Cory Gilbert ASL TSUM IU ALL CHANNELS 2008,260,10:00:00 2006,181,00:00:00 Problem Description OTHER This station has been upgraded to a Q330 digitizer. New metadata are available. An Episensor was installed in place of the FBA. Existing STS-2-HG was replaced with a new STS-2-HG. END **************************************************************************** DATA PROBLEM REPORT IDA2010:002 2010/01/28 IDA DCC Erik Klimczak IDA KWAJ II *** 2009,315,00:00:00 2009,322,00:00:00 Problem Description OTHER IDA station KWAJ was down from day 2009,315-22:01 to 2009,322-21:17 due to problems with the station computer. The station came back on-line after the station operator replaced a faulty hard drive in the ISP. END **************************************************************************** DATA PROBLEM REPORT ASL2007:090 2007/08/09 ASL DCC cgilbertormton ASL TIXI IU 00/?HE 2007,219,07:07:00 2007,113,16:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. E/W STS-1 is "pegged", data are unusable. END **************************************************************************** DATA PROBLEM REPORT ASL2007:091 2007/12/04 ASL DCC cgilbertormton ASL YSS IU * 2007,120,00:00:00 2007,113,16:00:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 450 Time Uncertain. Timing is in question during this time. END **************************************************************************** DATA PROBLEM REPORT ASL2010:021 2010/01/25 ASL DCC Cory Gilbert ASL RSSD IU ALL CHANNELS 2009,252,00:00:00 2006,181,00:00:00 Problem Description OTHER This station has been upgraded to a Q330 digitizer. New metadata are available. An Episensor was installed in place of the FBA. END **************************************************************************** DATA PROBLEM REPORT ASL2010:022 2010/01/25 ASL DCC Cory Gilbert ASL SAML IU ALL CHANNELS 2009,318,00:00:00 2006,181,00:00:00 Problem Description OTHER This station has been upgraded to a Q330 digitizer. New metadata are available. An Episensor was installed in place of the FBA. END **************************************************************************** DATA PROBLEM REPORT ASL2010:023 2010/01/25 ASL DCC Cory Gilbert ASL SDV IU ALL CHANNELS 2010,017,00:00:00 2006,181,00:00:00 Problem Description OTHER This station has been upgraded to a Q330 digitizer. New metadata are available. An Episensor was installed in place of the FBA. END **************************************************************************** DATA PROBLEM REPORT ASL2010:024 2010/01/25 ASL DCC Cory Gilbert ASL SFJD IU ALL CHANNELS 2008,264,00:00:00 2006,181,00:00:00 Problem Description OTHER This station has been upgraded to a Q330 digitizer. New metadata are available. An Episensor was installed in place of the FBA. END **************************************************************************** DATA PROBLEM REPORT ASL2010:020 2010/01/25 ASL DCC Cory Gilbert ASL RCBR IU ALL CHANNELS 2009,210,00:00:00 2006,181,00:00:00 Problem Description OTHER This station has been upgraded to a Q330 digitizer. New metadata are available. An Episensor was installed in place of the FBA. END **************************************************************************** DATA PROBLEM REPORT IDA2010:014 2010/05/28 IDA DCC Erik Klimczak IDA ABKT II *** 2010,090,00:00:00 2010,090,00:00:00 Problem Description OTHER IDA station ABKT has problems with the DAS since day 2010,090-07:00. A faulty circuit board in the DAS is suspected. END PROBLEM RESOLUTION REPORT IDA2010:014 2010/08/20 IDA Erik Klimczak Description of Problem Resolution RESOLUTION The station is back on-line after an IDA engineer visited the station and repaired the DAS. END **************************************************************************** DATA PROBLEM REPORT ASL2010:018 2010/01/25 ASL DCC Cory Gilbert ASL PAB IU ALL CHANNELS 2009,226,00:00:00 2006,181,00:00:00 Problem Description OTHER This station has been upgraded to a Q330 digitizer. New metadata are available. An Episensor was installed in place of the FBA. An STS-2-HG was installed in addition to the STS-1 already in place. END **************************************************************************** DATA PROBLEM REPORT IDA2010:015 2010/05/28 IDA DCC Erik Klimczak IDA AAK II *** 2010,141,00:00:00 2010,145,00:00:00 Problem Description OTHER IDA station AAK was down from day 2010,141 to 2010,145 due to a power outage caused by a storm. Data acquisition was restored after a power line to the station was repaired. END **************************************************************************** DATA PROBLEM REPORT ASL2010:019 2010/01/25 ASL DCC Cory Gilbert ASL PTGA IU ALL CHANNELS 2009,310,12:00:00 2006,181,00:00:00 Problem Description OTHER This station has been upgraded to a Q330 digitizer. New metadata are available. An Episensor was installed in place of the FBA. An STS-2-HG was installed in place of the CMG. END **************************************************************************** DATA PROBLEM REPORT IDA2010:016 2010/05/28 IDA DCC Erik Klimczak IDA PFO II *** 2010,132,00:00:00 2010,132,00:00:00 Problem Description OTHER The North-South channels from the STS-1 seismometer are showing high background noise since the seismometer interface box and cables were changed on day 2010,132. IDA engineers are currently investigating the problem. END PROBLEM RESOLUTION REPORT IDA2010:016 2010/10/22 IDA Erik Klimczak Description of Problem Resolution RESOLUTION Data quality for the North-South channels from the STS-1 seismometer improved as of day 2010,211, after an IDA engineer visited the station and replaced the STS-1N seismometer. END **************************************************************************** DATA PROBLEM REPORT ANSS2010:009 2010/03/11 ANSS DCC Leo Sandoval ANSS LPAZ GT *H* 2010,043,14:40:00 2010,050,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE S 2515 Data dropouts GT_LPAZ Excessive Data Gaps 2010,043,14:40 -> 050,00:00 END **************************************************************************** DATA PROBLEM REPORT IDA2010:017 2010/06/30 IDA DCC Erik Klimczak IDA NNA II *** 2010,147,00:00:00 2010,151,00:00:00 Problem Description OTHER IDA station NNA was down from day 2010,147-15:50 to 2010,151-16:56 due to problems with the DAS. Data acquisition was restored after the station operator visited the station and cycled power to the DAS. END **************************************************************************** DATA PROBLEM REPORT ANSS2010:008 2010/03/11 ANSS DCC Leo Sandoval ANSS LBTB GT *H* 2010,043,14:40:00 2010,050,00:00:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE S 2515 Data dropouts GT_LBTB Excessive Data Gaps 2010,043,14:40 -> 050,00:00 END **************************************************************************** DATA PROBLEM REPORT IDA2010:010 2010/03/30 IDA DCC Erik Klimczak IDA JTS II BBZ-00 2010,065,00:00:00 2010,065,00:00:00 Problem Description OTHER There are long period pulses on the vertical channels from the STS-1 seismometer since day 2010,065-18:00 for reasons yet to be determined. END **************************************************************************** DATA PROBLEM REPORT ASL2010:014 2010/01/25 ASL DCC Cory Gilbert ASL LSZ IU ALL CHANNELS 2008,252,00:00:00 2006,181,00:00:00 Problem Description OTHER This station has been upgraded to a Q330 digitizer. New metadata are available. An Episensor was installed in place of the FBA. END **************************************************************************** DATA PROBLEM REPORT IDA2010:011 2010/03/30 IDA DCC Erik Klimczak IDA NNA II *** 2010,084,00:00:00 2010,088,00:00:00 Problem Description OTHER IDA station NNA was down from day 2010,084-23:51 to 2010,088-00:10 due to problems with the DAS. The station came back on-line after repeated attempts to cycle power to the DAS. END **************************************************************************** DATA PROBLEM REPORT ASL2010:015 2010/01/25 ASL DCC Cory Gilbert ASL LVC IU ALL CHANNELS 2009,100,00:00:00 2006,181,00:00:00 Problem Description OTHER This station has been upgraded to a Q330 digitizer. New metadata are available. An Episensor was installed in place of the FBA. END **************************************************************************** DATA PROBLEM REPORT IDA2010:012 2010/05/28 IDA DCC Erik Klimczak IDA BFO II VSB 2010,059,00:00:00 2010,102,00:00:00 Problem Description DEAD CHANNEL The VSB channel from the Cambridge Invar wire strainmeter was nonfunctional from day 2010,059 to day 2010,102. This channel was restored after the station operator replaced the silica gel for the instrument. END **************************************************************************** DATA PROBLEM REPORT ASL2010:016 2010/01/25 ASL DCC Cory Gilbert ASL MAJO IU ALL CHANNELS 2009,311,12:00:00 2006,181,00:00:00 Problem Description OTHER This station has been upgraded to a Q330 digitizer. New metadata are available. An Episensor was installed in place of the FBA. END **************************************************************************** DATA PROBLEM REPORT IDA2010:013 2010/05/28 IDA DCC Erik Klimczak IDA MSEY II *** 2010,110,00:00:00 2010,111,00:00:00 Problem Description OTHER The station was down from day 2010,110-17:09 to 2010,111-21:24 due to problems with the DAS. Data acquisition was restored after a warm reset of the DAS. END **************************************************************************** DATA PROBLEM REPORT ASL2010:017 2010/01/25 ASL DCC Cory Gilbert ASL OTAV IU ALL CHANNELS 2009,091,00:00:00 2006,181,00:00:00 Problem Description OTHER This station has been upgraded to a Q330 digitizer. New metadata are available. An Episensor was installed in place of the FBA. An STS-2-HG was installed in place of the CMG. END **************************************************************************** DATA PROBLEM REPORT ANSS2010:003 2010/03/08 ANSS DCC Leo Sandoval ANSS WMOK US *H* 2010,030,09:45:00 2010,062,18:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE S 2507 Station down. US_WMOK Station down due to storm damage Power lines all down in area due to ICE Storm NO Data 2010 030 -> 062, 18:00 END **************************************************************************** DATA PROBLEM REPORT ANSS2010:002 2010/03/08 ANSS DCC Leo Sandoval ANSS PKME US *H* 2009,001,00:00:00 2009,365,23:59:00 Problem Description NOISE US_PKME For 2009 Data Quality Bad 2009,001 -> 223,16:00 with Instrument problems, Most data at or near Stops\ 223 -> 365 Data Quality Good after Maint visit. Data gap backfilled 016 -> 218 08 March 2010 END **************************************************************************** DATA PROBLEM REPORT ANSS2010:001 2010/02/02 ANSS DCC Leo Sandoval ANSS CNNC US *H* 2010,001,00:00:00 2010,014,19:00:00 Problem Description OTHER SEED COMMENT REFERENCE S 2501 Data unusable. US_CNNC 2010,001,00:00 -> 014,19:00 No data unusable instrument on stops and comm problems Operational 014,19:00 END **************************************************************************** DATA PROBLEM REPORT ASL2007:081 2007/04/20 ASL DCC Valerie Peyton ASL TUC IU 00/*H* 2007,109,23:35:00 2007,109,03:37:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. All three components of the TUC STS1 are producing digitizer noise. Data are not useable. END **************************************************************************** DATA PROBLEM REPORT ANSS2010:007 2010/03/11 ANSS DCC Leo Sandoval ANSS DBIC GT *H* 2010,043,14:40:00 2010,050,00:00:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE S 2515 Data dropouts GT_DBIC Excessive Data Gaps 2010,043,14:40 -> 050,00:00 END **************************************************************************** DATA PROBLEM REPORT ASL2007:082 2007/04/20 ASL DCC Valerie Peyton ASL SFJD IU 10/*H* 2007,109,18:50:00 2007,109,03:37:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The SFJD STS2 is producing digitizer noise. Data are not useable. END **************************************************************************** DATA PROBLEM REPORT ANSS2010:006 2010/03/11 ANSS DCC Leo Sandoval ANSS CPUP GT *H* 2010,043,14:40:00 2010,050,00:00:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE S 2515 Data dropouts GT_CPUP Excessive Data gaps 2010,043,14:00 -> 050,00:00 END **************************************************************************** DATA PROBLEM REPORT ANSS2010:005 2010/03/11 ANSS DCC Leo Sandoval ANSS BOSA GT *H* 2010,043,14:40:00 2010,050,00:00:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE S 2515 Data dropouts GT_BOSA Excessive Data gap 2010, 023,14:40 -> 050,00:00 END **************************************************************************** DATA PROBLEM REPORT ASL2007:080 2007/04/18 ASL DCC Valerie Peyton ASL SJG IU 00/*HN 2007,108,07:16:00 2007,109,03:37:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The N component of the STS1 at SJG is down. Data are not useable. END **************************************************************************** DATA PROBLEM REPORT ANSS2010:004 2010/03/08 ANSS DCC Leo Sandoval ANSS BLA US *HE 2009,162,00:00:00 2009,162,00:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE S 2508 Data intermittant. US_BLA Problem with *HE E/W First reported 2009 June 11 (162) Problem channel resoved itself (197) Instrument replaced Aug 17 (229) Problem Returned Sept 07 (250) Test done 2010,034 , conclusion Bad Q330 replacement sent Awaiting installation as of 08 March. THis channel has been intermittent since 2009, 162 -> 2010, ??? END **************************************************************************** DATA PROBLEM REPORT ASL2007:085 2007/04/24 ASL DCC Valerie Peyton ASL QSPA IU 20/*H* 2007,113,19:08:00 2007,113,16:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The QSPA STS2 masses have fallen against their stops. At first, large events are visible. After that, data are not useable. END **************************************************************************** DATA PROBLEM REPORT ASL2007:086 2007/05/23 ASL DCC Tyler Stormton ASL SDV IU 10/* 2007,142,05:10:00 2007,113,16:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. Instrument masses are pegged. Data are unuseable. END **************************************************************************** DATA PROBLEM REPORT ASL2007:083 2007/04/23 ASL DCC Valerie Peyton ASL RAR IU 10/*HN 2007,112,05:01:00 2007,113,16:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The N component of the RAR CMG3-T is pegged. Data are not useable. END **************************************************************************** DATA PROBLEM REPORT ASL2007:084 2007/04/23 ASL DCC Valerie Peyton ASL HKT IU 00/*HE 2007,110,00:36:00 2007,113,16:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The HKT STS1 E component has fallen against one of its stops. At first large events are visible. After a while, data are not useable at all. END **************************************************************************** DATA PROBLEM REPORT ASL2007:089 2007/05/30 ASL DCC Tyler Stormton ASL MSKU IU 10/* 2007,137,15:44:00 2007,113,16:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. Instrument masses are pegged. END **************************************************************************** DATA PROBLEM REPORT ANSS2010:010 2010/03/11 ANSS DCC Leo Sandoval ANSS PLCA GT *H* 2010,043,14:40:00 2010,050,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE S 2515 Data dropouts GT_PLCA Excessive Data gaps 2010,043,14:40 -> 050,00:00 END **************************************************************************** DATA PROBLEM REPORT ASL2007:087 2007/05/23 ASL DCC Tyler Stormton ASL ANMO IU 10/* 2007,139,04:01:00 2007,113,16:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. Instrument masses are pegged. Data are unuseable. END **************************************************************************** DATA PROBLEM REPORT ASL2007:088 2007/05/30 ASL DCC Tyler Stormton ASL LVC IU 10/*HE 2007,145,17:48:00 2007,113,16:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. Instrument mass is on a stop. END **************************************************************************** DATA PROBLEM REPORT ASL2010:010 2010/01/25 ASL DCC Cory Gilbert ASL HRV IU ALL CHANNELS 2008,266,00:00:00 2006,181,00:00:00 Problem Description OTHER This station has been upgraded to a Q330 digitizer. New metadata are available. An STS-2-HG and an Episensor were intalled in addition to the STS-1. END **************************************************************************** DATA PROBLEM REPORT ASL2010:011 2010/01/25 ASL DCC Cory Gilbert ASL INCN IU ALL CHANNELS 2009,320,03:00:00 2006,181,00:00:00 Problem Description OTHER This station has been upgraded to a Q330 digitizer. New metadata are available. The STS-2-HG was replaced with a new STS-2-HG, as well as an Episensor was installed in place of the FBA. END **************************************************************************** DATA PROBLEM REPORT ASL2010:012 2010/01/25 ASL DCC Cory Gilbert ASL KEV IU ALL CHANNELS 2008,255,00:00:00 2006,181,00:00:00 Problem Description OTHER This station has been upgraded to a Q330 digitizer. New metadata are available. An Episensor was installed in place of the FBA. END **************************************************************************** DATA PROBLEM REPORT ASL2010:013 2010/01/25 ASL DCC Cory Gilbert ASL KONO IU ALL CHANNELS 2009,255,15:02:42 2006,181,00:00:00 Problem Description OTHER This station has been upgraded to a Q330 digitizer. New metadata are available. An Episensor was installed in place of the FBA. END **************************************************************************** DATA PROBLEM REPORT IDA2010:007 2010/01/28 IDA DCC Erik Klimczak IDA EFI II *** 2010,012,00:00:00 2010,012,00:00:00 Problem Description OTHER IDA station EFI is down as of day 2010,012-13:57 due to problems with the Q330 efi00 digitizer. A replacement Q330 digitizer is being prepared to ship to the station. END PROBLEM RESOLUTION REPORT IDA2010:007 2010/03/08 IDA Erik Klimczak Description of Problem Resolution RESOLUTION Data telemetry from IDA station EFI was restored on 2010,035-16:42. Timing remained uncertain until 2010,057-00:29 when the station operator replaced the efi00 Q330 digitizer. END **************************************************************************** DATA PROBLEM REPORT IDA2010:008 2010/01/28 IDA DCC Erik Klimczak IDA EFI II BB*-10 2010,012,00:00:00 2010,012,00:00:00 Problem Description DEAD CHANNEL The BB*-10 channels from the CMG-3T seismometer are nonseismic as of day 2010,012-13:57. The station operator has been requested to cylce power to the CMG-3T seismometer followed by recentering the masses for the sensor. END PROBLEM RESOLUTION REPORT IDA2010:008 2010/03/08 IDA Erik Klimczak Description of Problem Resolution RESOLUTION The BB*-10 channels from the CMG-3T seismometer are seismic as of day 2010,035-16:42 after the station operator cycled power to the sensor, and an IDA engineer recentered the masses for the sensor. END **************************************************************************** DATA PROBLEM REPORT IDA2010:009 2010/03/16 IDA DCC Erik Klimczak IDA HOPE II BB*-00 2010,068,00:00:00 2010,068,00:00:00 Problem Description OTHER All channels from the STS-2 seismometer are showing large intermittent spikes starting day 2010,068-08:10. A faulty sensor is suspected and it will be replaced during the next station visit. END **************************************************************************** DATA PROBLEM REPORT IDA2006:005 2006/06/28 IDA DCC Erik Klimczak IDA ERM II *** 2006,116,00:00:00 2006,116,00:00:00 Problem Description OTHER The East-West channels from the STS-1 seismometer have high background noise levels since data acquisition resumed on day 116 following an outage of uncertain origin. END PROBLEM RESOLUTION REPORT IDA2006:005 2012/12/07 IDA Erik Klimczak Description of Problem Resolution RESOLUTION The East-West channels from the STS-1 seismometer were restored after IDA engineers replaced the STS-1 seismometer and upgraded the station to a Quanterra Q330HR system. END **************************************************************************** DATA PROBLEM REPORT IDA2010:025 2010/08/20 IDA DCC Erik Klimczak IDA KWAJ II *** 2010,203,00:00:00 2010,230,00:00:00 Problem Description OTHER The station was down from day 2010,203-05:45 to 2010,230-23:03 due to problems with the ISP. Data acquisition was restored after the station operator cleared disk errors and rebooted the ISP. END **************************************************************************** DATA PROBLEM REPORT IDA2010:026 2010/08/20 IDA DCC Erik Klimczak IDA PALK II BH1-10,LH1-10 2010,211,00:00:00 2010,211,00:00:00 Problem Description OTHER The BB110 channels from the CMG-3T seismometer are non-seismic as of day 2010,211 for reasons yet to be determined. END PROBLEM RESOLUTION REPORT IDA2010:026 2013/12/11 IDA Erik Klimczak Description of Problem Resolution RESOLUTION The North-South auxiliary channels have been restored after IDA engineers visited the station and replaced the faulty CMG-3T seismometer with a Trillium 120 seismometer. END **************************************************************************** DATA PROBLEM REPORT IDA2010:027 2010/08/20 IDA DCC Erik Klimczak IDA PALK II BH*-00,LH*-00,LN*-00 2010,211,00:00:00 2010,221,00:00:00 Problem Description OTHER All channels from the KS-54000 seismometer and FBA-23 accelerometer were not being acquired from day 2010,218-05:27 to 2010,221-18:04 due to problems with the Q330HR digitizer. Data acquisition for these channels resumed after the station operator replaced the Q330HR digitizer. END **************************************************************************** DATA PROBLEM REPORT IDA2010:028 2010/08/20 IDA DCC Erik Klimczak IDA HOPE II *** 2010,216,00:00:00 2010,219,00:00:00 Problem Description OTHER The station was down from day 2010,216-16:49 to 2010,219-12:48 due to problems with the DAS. END **************************************************************************** DATA PROBLEM REPORT IDA2010:021 2010/06/30 IDA DCC Erik Klimczak IDA TLY II BB*-00 2010,168,00:00:00 2010,171,00:00:00 Problem Description OTHER Broadband channels were not acquired from day 2010,168-17:27 to 2010,171-02:59 due to a problem with the DAS. Following, the vertical and East-West channels were not acquired from day 2010,173-11:10 to 2010,175-22:39. A failing RT303 board in the DAS is suspected. END **************************************************************************** DATA PROBLEM REPORT ASL2010:047 2010/03/22 ASL DCC Cory Gilbert ASL CASY IU 20/?NN 1996,169,00:00:00 2010,006,00:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The N/S component of the FBA has been down since the middle of 1996. The other two components are working just fine. END **************************************************************************** DATA PROBLEM REPORT IDA2010:022 2010/06/30 IDA DCC Erik Klimczak IDA ASCN II *** 2010,165,00:00:00 2010,181,00:00:00 Problem Description OTHER IDA station ASCN was down from day 2010,165-09:15 to 2010,181-10:14 due to problems with the station computer. Data acquisition was restored after the station computer was rebooted and several processes were re-started. END **************************************************************************** DATA PROBLEM REPORT ASL2010:048 2010/03/22 ASL DCC Cory Gilbert ASL CHTO IU 20/?N1 2009,270,00:00:00 2010,006,00:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. The ?N1 component of the episensor seems to have gone down soon after the field crew left the station after the upgrade last year. Everything checked out well before they left site and there hasn't been any events large enough to push the sensor, so it's tough to tell exactly when it happened. END **************************************************************************** DATA PROBLEM REPORT IDA2010:023 2010/06/30 IDA DCC Erik Klimczak IDA SHEL II *** 2010,179,00:00:00 2010,179,00:00:00 Problem Description OTHER IDA station SHEL is down as of day 2010,179, following a scheduled power outage, due to problems with a circuit board in the DAS that is causing excessive gapping across all channels. END PROBLEM RESOLUTION REPORT IDA2010:023 2010/08/20 IDA Erik Klimczak Description of Problem Resolution RESOLUTION The station is back on-line after the station operator pulled the faulty RT303 circuit board from the DAS. Subsequently, there were no East-West channels from the KS-54000 seismometer until the station operator replaced the circuit board with one shipped to the station. END **************************************************************************** DATA PROBLEM REPORT ASL2010:049 2010/03/22 ASL DCC Cory Gilbert ASL CHTO IU 00/?H? 2009,336,00:00:00 2010,006,00:00:00 Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE C 4503 Channel has intermittant low frequency noise. The horizontal components of the primary instrument go through periods of pulsing that seems to come and go on it's own. It is starting to improve, but is not completely solved at this time. END **************************************************************************** DATA PROBLEM REPORT IDA2010:024 2010/08/20 IDA DCC Erik Klimczak IDA KURK II *** 2010,207,00:00:00 2010,207,00:00:00 Problem Description OTHER The station is down as of day 2010,207-09:14 due to damages caused by a thunderstorm. A new GPS clock and XCOMM board for the DAS have been shipped to the station. END **************************************************************************** DATA PROBLEM REPORT IDA2010:020 2010/06/30 IDA DCC Erik Klimczak IDA AAK II *** 2010,164,00:00:00 2010,164,00:00:00 Problem Description OTHER IDA station AAK is down due to a problem with the GPS. A new GPS antenna cable and additional lightning protection has been shipped to the station. END PROBLEM RESOLUTION REPORT IDA2010:020 2010/08/20 IDA Erik Klimczak Description of Problem Resolution RESOLUTION The station is back on-line and the clock is locked and functioning normally as of day 2010,219-09:11 after an IDA engineer visited the station and repaired the GPS antenna and replaced the aak10 DAS. END **************************************************************************** DATA PROBLEM REPORT ASL2007:070 2007/03/27 ASL DCC Valerie Peyton ASL DAV IU */* 2007,083,05:09:00 2007,086,03:41:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. A CTBTO engineer is on site at DAV for station maintenance. Expect variable data quality and availability, as well as calibrations and other tests. END **************************************************************************** DATA PROBLEM REPORT ASL2007:071 2007/03/28 ASL DCC Valerie Peyton ASL TARA IU */* 2007,086,00:00:00 2007,088,22:01:00 Problem Description OTHER SEED COMMENT REFERENCE S 100 Station Maintenance. Tests may be in progress. An ASL field team is at TARA installing the station. Expect variable data quality and availability, as well as calibrations and other tests. END **************************************************************************** DATA PROBLEM REPORT ASL2007:074 2007/04/12 ASL DCC Valerie Peyton ASL AFI IU 00/LDO 2006,146,00:00:00 2007,093,13:19:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE C 4215 Time uncertain; error less than 1 second. The manner in which Paroscientific microbarograph data are sampled introduces known, uncorrectable timing errors. Because the Paroscientific microbarograph is a digital instrument, it cannot be recorded on a regular analog-to-digital digitizer. Instead, microbarograph data from a Paroscientific microbarograph are collected through a serial port, and not obtained via a proper digitizer. Once a second software "requests" a data point from the microbarograph. The time stamp given each data point is the time at which the request for data point was made. There is no way to determine precisely when each data point was sampled. The timing error introduced by this sampling method usually is less than 1 second. In addition, gaps of 3 samples occur at irregular intervals, and are caused when the serial port does not respond in a timely manner. At that point, the software re-initializes the instrument. The re-initialization process produces 3-sample gaps. END **************************************************************************** DATA PROBLEM REPORT ASL2007:075 2007/04/12 ASL DCC Valerie Peyton ASL CHTO IU 00/LDO 2003,031,00:00:00 2007,093,13:19:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE C 4215 Time uncertain; error less than 1 second. The manner in which Paroscientific microbarograph data are sampled introduces known, uncorrectable timing errors. Because the Paroscientific microbarograph is a digital instrument, it cannot be recorded on a regular analog-to-digital digitizer. Instead, microbarograph data from a Paroscientific microbarograph are collected through a serial port, and not obtained via a proper digitizer. Once a second software "requests" a data point from the microbarograph. The time stamp given each data point is the time at which the request for data point was made. There is no way to determine precisely when each data point was sampled. The timing error introduced by this sampling method usually is less than 1 second. In addition, gaps of 3 samples occur at irregular intervals, and are caused when the serial port does not respond in a timely manner. At that point, the software re-initializes the instrument. The re-initialization process produces 3-sample gaps. END **************************************************************************** DATA PROBLEM REPORT ASL2007:072 2007/04/02 ASL DCC Valerie Peyton ASL QSPA IU 20/*H* 2007,091,18:09:00 2007,093,13:19:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The QSPA STS2 masses have fallen against their stops. At first, large events are visible. After that, data are not useable. END **************************************************************************** DATA PROBLEM REPORT ASL2007:073 2007/04/11 ASL DCC Valerie Peyton ASL TARA IU 00/LDO 2007,073,00:00:00 2007,093,13:19:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE C 4215 Time uncertain; error less than 1 second. The manner in which Paroscientific microbarograph data are sampled introduces known, uncorrectable timing errors. Because the Paroscientific microbarograph is a digital instrument, it cannot be recorded on a regular analog-to-digital digitizer. Instead, microbarograph data from a Paroscientific microbarograph are collected through a serial port, and not obtained via a proper digitizer. Once a second software "requests" a data point from the microbarograph. The time stamp given each data point is the time at which the request for data point was made. There is no way to determine precisely when each data point was sampled. The timing error introduced by this sampling method usually is less than 1 second. In addition, gaps of 3 samples occur at irregular intervals, and are caused when the serial port does not respond in a timely manner. At that point, the software re-initializes the instrument. The re-initialization process produces 3-sample gaps. END **************************************************************************** DATA PROBLEM REPORT ASL2007:078 2007/04/12 ASL DCC Valerie Peyton ASL ANMO IU 10/LDI 1999,313,19:00:00 2000,229,14:00:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE C 4215 Time uncertain; error less than 1 second. The manner in which Paroscientific microbarograph data are sampled introduces known, uncorrectable timing errors. Because the Paroscientific microbarograph is a digital instrument, it cannot be recorded on a regular analog-to-digital digitizer. Instead, microbarograph data from a Paroscientific microbarograph are collected through a serial port, and not obtained via a proper digitizer. Once a second software "requests" a data point from the microbarograph. The time stamp given each data point is the time at which the request for data point was made. There is no way to determine precisely when each data point was sampled. The timing error introduced by this sampling method usually is less than 1 second. In addition, gaps of 3 or more samples occur at irregular intervals, and are caused when the serial port does not respond in a timely manner. At that point, the software re-initializes the instrument. The re-initialization process produces multi-sample gaps. END **************************************************************************** DATA PROBLEM REPORT ASL2007:079 2007/04/12 ASL DCC Valerie Peyton ASL ANMO IU 10/LDO 2000,229,14:00:00 2000,293,16:00:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE C 4215 Time uncertain; error less than 1 second. The manner in which Paroscientific microbarograph data are sampled introduces known, uncorrectable timing errors. Because the Paroscientific microbarograph is a digital instrument, it cannot be recorded on a regular analog-to-digital digitizer. Instead, microbarograph data from a Paroscientific microbarograph are collected through a serial port, and not obtained via a proper digitizer. Once a second software "requests" a data point from the microbarograph. The time stamp given each data point is the time at which the request for data point was made. There is no way to determine precisely when each data point was sampled. The timing error introduced by this sampling method usually is less than 1 second. In addition, gaps of 3 or more samples occur at irregular intervals, and are caused when the serial port does not respond in a timely manner. At that point, the software re-initializes the instrument. The re-initialization process produces multi-sample gaps. END **************************************************************************** DATA PROBLEM REPORT ASL2007:076 2007/04/12 ASL DCC Valerie Peyton ASL FUNA IU 00/LDO 2006,155,00:00:00 2007,093,13:19:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE C 4215 Time uncertain; error less than 1 second. The manner in which Paroscientific microbarograph data are sampled introduces known, uncorrectable timing errors. Because the Paroscientific microbarograph is a digital instrument, it cannot be recorded on a regular analog-to-digital digitizer. Instead, microbarograph data from a Paroscientific microbarograph are collected through a serial port, and not obtained via a proper digitizer. Once a second software "requests" a data point from the microbarograph. The time stamp given each data point is the time at which the request for data point was made. There is no way to determine precisely when each data point was sampled. The timing error introduced by this sampling method usually is less than 1 second. In addition, gaps of 3 samples occur at irregular intervals, and are caused when the serial port does not respond in a timely manner. At that point, the software re-initializes the instrument. The re-initialization process produces 3-sample gaps. END **************************************************************************** DATA PROBLEM REPORT ASL2007:077 2007/04/12 ASL DCC Valerie Peyton ASL QSPA IU 00/LDO 2006,018,00:00:00 2000,293,16:00:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE C 4215 Time uncertain; error less than 1 second. The manner in which Paroscientific microbarograph data are sampled introduces known, uncorrectable timing errors. Because the Paroscientific microbarograph is a digital instrument, it cannot be recorded on a regular analog-to-digital digitizer. Instead, microbarograph data from a Paroscientific microbarograph are collected through a serial port, and not obtained via a proper digitizer. Once a second software "requests" a data point from the microbarograph. The time stamp given each data point is the time at which the request for data point was made. There is no way to determine precisely when each data point was sampled. The timing error introduced by this sampling method usually is less than 1 second. In addition, gaps of 3 samples occur at irregular intervals, and are caused when the serial port does not respond in a timely manner. At that point, the software re-initializes the instrument. The re-initialization process produces 3-sample gaps. END **************************************************************************** DATA PROBLEM REPORT ASL2010:043 2010/03/05 ASL DCC Cory Gilbert ASL SDV IU 00/?HZ, 00/?HN, 00/?HE 2004,074,00:00:00 2010,021,00:00:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4625 Invalid instrument response. This instrument has an amplitude dependent lowered response at longer periods. The effect is non-linear and is greater as the ground motion amplitude increases. Most likely this problem was caused by moisture in the feedback electronics box or the seismometer enclosure. The problem has most likely become worse over time. Although we recognize this problem we do not have a good way to describe it in the dataless SEED at this time, but we are working on it. END **************************************************************************** DATA PROBLEM REPORT ASL2010:044 2010/03/05 ASL DCC Cory Gilbert ASL PET IU 00/?HN 2005,151,00:00:00 2010,006,00:00:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4625 Invalid instrument response. This instrument has an amplitude dependent lowered response at longer periods. The effect is non-linear and is greater as the ground motion amplitude increases. Most likely this problem was caused by moisture in the feedback electronics box or the seismometer enclosure. The problem has most likely become worse over time. Although we recognize this problem we do not have a good way to describe it in the dataless SEED at this time, but we are working on it. END **************************************************************************** DATA PROBLEM REPORT ASL2010:045 2010/03/05 ASL DCC Cory Gilbert ASL SSE IC 00/?HZ, 00/?HN, 00/?HE 2001,001,00:00:00 2010,006,00:00:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4625 Invalid instrument response. This instrument has an amplitude dependent lowered response at longer periods. The effect is non-linear and is greater as the ground motion amplitude increases. Most likely this problem was caused by moisture in the feedback electronics box or the seismometer enclosure. The problem has most likely become worse over time. Although we recognize this problem we do not have a good way to describe it in the dataless SEED at this time, but we are working on it. NOTE: This issue is definitely present on the vertical component. It looks like it is present on the horizontals as well, although it's tough to pin down an exact date. END **************************************************************************** DATA PROBLEM REPORT ASL2010:046 2010/03/05 ASL DCC Cory Gilbert ASL SAML IU 00/?H? 2009,318,00:00:00 2010,006,00:00:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4625 Invalid instrument response. The 54000 that is installed at SAML has some gain (and other) issues. The field crew discovered that it had been damaged during transport to the station. While on-site, they used what they could of the sensor that was to be replaced in addition to what was usable from the new instrument to get something that would produce data. A plan is in place to send another instrument when time and funding are available. END **************************************************************************** DATA PROBLEM REPORT IDA2010:018 2010/06/30 IDA DCC Erik Klimczak IDA JTS II *** 2010,147,00:00:00 2010,152,00:00:00 Problem Description OTHER IDA station JTS was down from day 2010,147-22:03 to 2010,152-19:03 due to a power outage caused by a storm. Data acquisition was restored after the station operator visited the station and switched the power inverter back on. END **************************************************************************** DATA PROBLEM REPORT IDA2010:019 2010/06/30 IDA DCC Erik Klimczak IDA BORG II *** 2010,154,00:00:00 2010,160,00:00:00 Problem Description OTHER IDA station BORG was down from day 2010,154-14:29 to 2010,160-14:11 due to problems with the DAS. Data acquisition was restored after the station operator visited the station and cycled power to the DAS. END **************************************************************************** DATA PROBLEM REPORT ASL2010:040 2010/03/05 ASL DCC Cory Gilbert ASL MA2 IU 00/?HZ 2005,035,00:00:00 2010,054,00:00:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4625 Invalid instrument response. This instrument has an amplitude dependent lowered response at longer periods. The effect is non-linear and is greater as the ground motion amplitude increases. Most likely this problem was caused by moisture in the feedback electronics box or the seismometer enclosure. The problem has most likely become worse over time. Although we recognize this problem we do not have a good way to describe it in the dataless SEED at this time, but we are working on it. END **************************************************************************** DATA PROBLEM REPORT ASL2010:041 2010/03/05 ASL DCC Cory Gilbert ASL MA2 IU 00/?HN 2007,331,00:00:00 2010,054,00:00:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4625 Invalid instrument response. This instrument has an amplitude dependent lowered response at longer periods. The effect is non-linear and is greater as the ground motion amplitude increases. Most likely this problem was caused by moisture in the feedback electronics box or the seismometer enclosure. The problem has most likely become worse over time. Although we recognize this problem we do not have a good way to describe it in the dataless SEED at this time, but we are working on it. END **************************************************************************** DATA PROBLEM REPORT ASL2010:042 2010/03/05 ASL DCC Cory Gilbert ASL AFI IU 00/?HN 2005,121,00:00:00 2010,054,00:00:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4625 Invalid instrument response. This instrument has an amplitude dependent lowered response at longer periods. The effect is non-linear and is greater as the ground motion amplitude increases. Most likely this problem was caused by moisture in the feedback electronics box or the seismometer enclosure. The problem has most likely become worse over time. Although we recognize this problem we do not have a good way to describe it in the dataless SEED at this time, but we are working on it. END **************************************************************************** DATA PROBLEM REPORT IDA2010:036 2010/10/22 IDA DCC Erik Klimczak IDA NNA II *** 2010,263,00:00:00 2010,277,00:00:00 Problem Description OTHER IDA station NNA was down from day 2010,263 to 2010,277 due to problems with the DAS. Data acquisition was restored after the station operator cycled power to the DAS several times. END **************************************************************************** DATA PROBLEM REPORT IDA2010:037 2010/10/22 IDA DCC Erik Klimczak IDA RAYN II *** 2010,223,00:00:00 2010,271,00:00:00 Problem Description OTHER IDA station RAYN was down from day 2010,223 to 2010,271 due to failure of the power supply. Data acquisition was restored after the station operator bypassed the UPS. A replacement UPS has been shipped to the station. END **************************************************************************** DATA PROBLEM REPORT IDA2010:038 2010/10/22 IDA DCC Erik Klimczak IDA ERM II BHN-00,LHN-00,VHN-00 2010,287,00:00:00 2010,287,00:00:00 Problem Description OTHER The North-South channels from the STS-1 seismometer are non-seismic as of day 2010,287-13:59. END PROBLEM RESOLUTION REPORT IDA2010:038 2012/12/07 IDA Erik Klimczak Description of Problem Resolution RESOLUTION The North-South channels from the STS-1 seismometer were restored after IDA engineers replaced the STS-1 seismometer and upgraded the station to a Quanterra Q330HR system. There is still some long period noise possibly due to corrosion on the base plate connectors for the sensor. END **************************************************************************** DATA PROBLEM REPORT IDA2010:039 2010/10/22 IDA DCC Erik Klimczak IDA RPN II *** 2010,121,00:00:00 2010,121,00:00:00 Problem Description OTHER There have been ongoing problems with the VSAT telemetry link to RPN since May 2010. The station operator has been requested to adjust the transmission levels several times, which has, at times, temporarily restored the link. However, since the link remains unreliable, a new VSAT modem has been shipped to the station on day 2010,294 (Oct. 21,2010). END **************************************************************************** DATA PROBLEM REPORT IDA2010:032 2010/10/22 IDA DCC Erik Klimczak IDA MSEY II *** 2010,232,00:00:00 2010,232,00:00:00 Problem Description OTHER IDA station MSEY is down due to problems with the ARS and GPS clock. A replacement GPS clock was installed, however there are still problems with the ARS. END PROBLEM RESOLUTION REPORT IDA2010:032 2011/02/04 IDA Erik Klimczak Description of Problem Resolution RESOLUTION Data acquisition at IDA station MSEY was restored on day 2010,302-12:01. END **************************************************************************** DATA PROBLEM REPORT ASL2010:036 2010/03/05 ASL DCC Cory Gilbert ASL OTAV IU 00/?HZ, 00/?HN, 00/?HE 2007,165,00:00:00 2010,054,00:00:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4625 Invalid instrument response. This instrument has an amplitude dependent lowered response at longer periods. The effect is non-linear and is greater as the ground motion amplitude increases. Most likely this problem was caused by moisture in the feedback electronics box or the seismometer enclosure. The problem has most likely become worse over time. Although we recognize this problem we do not have a good way to describe it in the dataless SEED at this time, but we are working on it. END **************************************************************************** DATA PROBLEM REPORT IDA2010:033 2010/10/22 IDA DCC Erik Klimczak IDA SACV II *** 2010,235,00:00:00 2010,235,00:00:00 Problem Description OTHER IDA station SACV is down as of day 2010,235 due to problems with the DAS. A replacement DAS has been shipped to the station. END PROBLEM RESOLUTION REPORT IDA2010:033 2011/07/22 IDA Erik Klimczak Description of Problem Resolution RESOLUTION The station is back on-line as of day 2011,167-14:47 after an IDA engineer visited the station and performed maintenance on the power system. The station operator reported replacing the DAS on day 2011,061, however, a power problem prevented data acquisition. END **************************************************************************** DATA PROBLEM REPORT ASL2010:037 2010/03/05 ASL DCC Cory Gilbert ASL BJT IC 00/?HZ 2003,001,00:00:00 2010,054,00:00:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4625 Invalid instrument response. This instrument has an amplitude dependent lowered response at longer periods. The effect is non-linear and is greater as the ground motion amplitude increases. Most likely this problem was caused by moisture in the feedback electronics box or the seismometer enclosure. The problem has most likely become worse over time. Although we recognize this problem we do not have a good way to describe it in the dataless SEED at this time, but we are working on it. END **************************************************************************** DATA PROBLEM REPORT IDA2010:034 2010/10/22 IDA DCC Erik Klimczak IDA KURK II *** 2010,207,00:00:00 2010,253,00:00:00 Problem Description OTHER IDA station KURK was down from day 2010,207 to 2010,253 due to damage to the DAS caused by a thunderstorm. After a replacement DAS was installed there was a timing problem. Normal data acquisition resumed after the station operator replaced the GPS clock and XCOM board in the DAS. END **************************************************************************** DATA PROBLEM REPORT ASL2010:038 2010/03/05 ASL DCC Cory Gilbert ASL BJT IC 00/?HN 2005,001,00:00:00 2010,054,00:00:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4625 Invalid instrument response. This instrument has an amplitude dependent lowered response at longer periods. The effect is non-linear and is greater as the ground motion amplitude increases. Most likely this problem was caused by moisture in the feedback electronics box or the seismometer enclosure. The problem has most likely become worse over time. Although we recognize this problem we do not have a good way to describe it in the dataless SEED at this time, but we are working on it. END **************************************************************************** DATA PROBLEM REPORT IDA2010:035 2010/10/22 IDA DCC Erik Klimczak IDA ABPO II *** 2010,265,00:00:00 2010,272,00:00:00 Problem Description OTHER IDA station ABPO was down from day 2010,265-01:54 to 2010,272-12:21 due to problems with the station computer. Data acquisition was restored after an IDA engineer visited the station and upgraded it to a Q330HR system. END **************************************************************************** DATA PROBLEM REPORT ASL2010:039 2010/03/05 ASL DCC Cory Gilbert ASL MA2 IU 00/?HE 2006,120,00:00:00 2010,054,00:00:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4625 Invalid instrument response. This instrument has an amplitude dependent lowered response at longer periods. The effect is non-linear and is greater as the ground motion amplitude increases. Most likely this problem was caused by moisture in the feedback electronics box or the seismometer enclosure. The problem has most likely become worse over time. Although we recognize this problem we do not have a good way to describe it in the dataless SEED at this time, but we are working on it. END **************************************************************************** DATA PROBLEM REPORT IDA2010:030 2010/10/22 IDA DCC Erik Klimczak IDA ASCN II *** 2010,238,00:00:00 2010,293,00:00:00 Problem Description OTHER IDA station ASCN was down from day 2010,238-13:49 to 2010,293-11:29 due to problems with the station computer. Data acquisition was restored after the station operator replaced the ISP. END **************************************************************************** DATA PROBLEM REPORT IDA2010:031 2010/10/22 IDA DCC Erik Klimczak IDA DGAR II *** 2010,221,00:00:00 2010,255,00:00:00 Problem Description OTHER IDA station DGAR was down from day 2010,221-04:38 to 2010,255-04:05 due to problems with the station computer. Data acquisition was restored after the station operator replaced the ISP. END **************************************************************************** DATA PROBLEM REPORT IDA2007:056 2007/09/12 IDA DCC Erik Klimczak IDA RAYN II *** 2007,180,00:00:00 2007,180,00:00:00 Problem Description OTHER IDA station RAYN is down as of about day 2007,180 due to problems with the ISP that are yet to be determined. END PROBLEM RESOLUTION REPORT IDA2007:056 2008/12/11 IDA DCC Erik Klimczak Description of Problem Resolution RESOLUTION IDA station RAYN was upgraded to a Quanterra Q330HR system and is operational as of about day 2008,332. END **************************************************************************** DATA PROBLEM REPORT ASL2007:060 2007/03/12 ASL DCC Valerie Peyton ASL TIXI IU 10/EH* 10/SH* 2002,275,21:27:00 2002,281,03:45:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4625 Invalid instrument response. The TIXI station operator was working on the GS-13 amplifier settings during this time. Instrument sensitivity is variable and unreliable. END **************************************************************************** DATA PROBLEM REPORT ASL2007:063 2007/03/20 ASL DCC Valerie Peyton ASL FURI IU 00/*H* 2007,071,04:44:00 2007,078,08:03:00 Problem Description SPIKES SEED COMMENT REFERENCE C 4525 Channel has spiking and other data glitches. All three components of the FURI STS1 are afflicted with a terrible spiking problem. The spikes are so frequent that events are essentially not visible. END **************************************************************************** DATA PROBLEM REPORT ASL2007:064 2007/03/21 ASL DCC Valerie Peyton ASL TRQA IU 10/*H2 2007,079,02:03:00 2007,086,18:23:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The 2 component of the TRQA CMG3T-B is pegged. At first, large events may be visible; but beyond that, data are not useable. END **************************************************************************** DATA PROBLEM REPORT ASL2007:061 2007/03/19 ASL DCC Valerie Peyton ASL QSPA IU 20/*H* 2007,074,00:32:00 2007,075,14:53:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. All three components of the QSPA STS2 have fallen against their stops. Data are not useable. END **************************************************************************** DATA PROBLEM REPORT ASL2007:062 2007/03/19 ASL DCC Valerie Peyton ASL TIXI IU 00/*HZ 2007,077,19:13:00 2007,078,08:03:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The TIXI STS1 Z seismometer mass fell against its stop. Data are not useable. END **************************************************************************** DATA PROBLEM REPORT ASL2007:067 2007/03/27 ASL DCC Valerie Peyton ASL KEV IU 10/*H* 2007,080,18:35:00 2007,085,10:07:00 Problem Description OTHER SEED COMMENT REFERENCE C 1836 Instrument maintenance. Tests may be in progress. The KEV station operator was working on their digitzer which records a separate data stream from the CMG3-T. Expect variable data quality and availability, as well as tests and calibrations. END **************************************************************************** DATA PROBLEM REPORT ASL2007:068 2007/03/27 ASL DCC Valerie Peyton ASL SNZO IU 10/*HN 2007,086,09:11:00 2007,087,01:13:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The N component of the SNZO CMG3-T has fallen against its stop. Data are not useable. END **************************************************************************** DATA PROBLEM REPORT ASL2007:065 2007/03/22 ASL DCC Valerie Peyton ASL RAO IU 00/*HZ 2007,067,23:48:00 2007,100,01:25:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The RAO STS1 Z component has fallen against its stop. At first, large events may be visible. After that, data are not useable. END **************************************************************************** DATA PROBLEM REPORT ASL2007:066 2007/03/27 ASL DCC Valerie Peyton ASL SJG IU 00/*H* 2007,085,16:52:00 2007,092,12:57:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. All three components of the SJG STS1 are producing raw digitizer noise. Data are not useable. END **************************************************************************** DATA PROBLEM REPORT ASL2010:032 2010/03/05 ASL DCC Cory Gilbert ASL KIP IU 00/?HN, 00/?HE 2007,090,00:00:00 2010,055,00:00:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4625 Invalid instrument response. This instrument has an amplitude dependent lowered response at longer periods. The effect is non-linear and is greater as the ground motion amplitude increases. Most likely this problem was caused by moisture in the feedback electronics box or the seismometer enclosure. The problem has most likely become worse over time. Although we recognize this problem we do not have a good way to describe it in the dataless SEED at this time, but we are working on it. END **************************************************************************** DATA PROBLEM REPORT ASL2010:033 2010/03/05 ASL DCC Cory Gilbert ASL INCN IU 00/?HN 2002,080,00:00:00 2004,106,00:00:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4625 Invalid instrument response. This instrument has an amplitude dependent lowered response at longer periods. The effect is non-linear and is greater as the ground motion amplitude increases. Most likely this problem was caused by moisture in the feedback electronics box or the seismometer enclosure. The problem has most likely become worse over time. Although we recognize this problem we do not have a good way to describe it in the dataless SEED at this time, but we are working on it. END **************************************************************************** DATA PROBLEM REPORT ASL2007:069 2007/03/27 ASL DCC Valerie Peyton ASL GUMO IU 10/*HN 2007,069,22:31:00 2007,069,22:52:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The N component of the GUMO CMG3-T was forced to its stops by a local event. Data are not useable. END **************************************************************************** DATA PROBLEM REPORT ASL2010:034 2010/03/05 ASL DCC Cory Gilbert ASL HIA IC 00/?HZ 2006,001,00:00:00 2010,054,00:00:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4625 Invalid instrument response. This instrument has an amplitude dependent lowered response at longer periods. The effect is non-linear and is greater as the ground motion amplitude increases. Most likely this problem was caused by moisture in the feedback electronics box or the seismometer enclosure. The problem has most likely become worse over time. Although we recognize this problem we do not have a good way to describe it in the dataless SEED at this time, but we are working on it. END **************************************************************************** DATA PROBLEM REPORT ASL2010:035 2010/03/05 ASL DCC Cory Gilbert ASL CASY IU 00/?HN, 00/?HE 2006,202,00:00:00 2010,054,00:00:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4625 Invalid instrument response. This instrument has an amplitude dependent lowered response at longer periods. The effect is non-linear and is greater as the ground motion amplitude increases. Most likely this problem was caused by moisture in the feedback electronics box or the seismometer enclosure. The problem has most likely become worse over time. Although we recognize this problem we do not have a good way to describe it in the dataless SEED at this time, but we are working on it. END **************************************************************************** DATA PROBLEM REPORT IDA2010:029 2010/08/20 IDA DCC Erik Klimczak IDA NNA II *** 2010,221,00:00:00 2010,222,00:00:00 Problem Description OTHER IDA station NNA was down from day 2010,221-11:17 to 2010,222-21:08 due to problems with the DAS. Data acquisition was restored after the station operator visited the station and cycled power to the DAS. END **************************************************************************** DATA PROBLEM REPORT ASL2010:030 2010/01/25 ASL DCC Cory Gilbert ASL WAKE IU ALL CHANNELS 2007,319,00:00:00 2006,181,00:00:00 Problem Description OTHER This station has been upgraded to a Q330 digitizer. New metadata are available. An Episensor was installed in place of the FBA. The pre-existing STS-2-HG was replaced with a new STS-2-HG. END **************************************************************************** DATA PROBLEM REPORT ASL2010:031 2010/03/05 ASL DCC Cory Gilbert ASL KIP IU 00/?HZ 2004,001,00:00:00 2006,181,00:00:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4625 Invalid instrument response. This instrument has an amplitude dependent lowered response at longer periods. The effect is non-linear and is greater as the ground motion amplitude increases. Most likely this problem was caused by moisture in the feedback electronics box or the seismometer enclosure. The problem has most likely become worse over time. Although we recognize this problem we do not have a good way to describe it in the dataless SEED at this time, but we are working on it. END **************************************************************************** DATA PROBLEM REPORT ASL2010:106 2010/06/28 ASL DCC Cory Gilbert ASL KBS IU 00/?HZ 2010,176,02:04:08 2010,176,02:04:08 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The STS-1 vertical mass fell against its stops on 2010,176,02:04:08. It needs to be re-centered. END **************************************************************************** DATA PROBLEM REPORT ASL2010:107 2010/06/30 ASL DCC Cory Gilbert ASL KIP IU 10/?H? 2010,177,16:30:00 2010,177,16:30:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4530 Seismometer mass is against stops. The STS-2 has fallen against its stops as of 2010,177,16:30. Attempts to re-center remotely have not been successful. The station operator has been contacted and asked to re-center the instrument locally. END **************************************************************************** DATA PROBLEM REPORT ASL2010:108 2010/07/02 ASL DCC Cory Gilbert ASL QIZ IC 00/?HN, 00/?HE 2010,172,00:00:00 2010,172,00:00:00 Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE C 4503 Channel has intermittant low frequency noise. The horizontal components of the STS-2 have developed a daily occurence of ringing. We have seen this issue in the past, and usually goes away on it's own. We are unsure of the cause. The ringing seems to have a period of about 260 seconds, and lasts from a few hours at a time up to 20 hours at a time. END **************************************************************************** DATA PROBLEM REPORT ASL2010:109 2010/07/02 ASL DCC Cory Gilbert ASL GUMO IU ?0/?H? 2010,170,00:00:00 2010,170,00:00:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE C 4210 Time uncertain. The clock quality at the station is bad since 2010,170. Field engineers are currently working on it. END **************************************************************************** DATA PROBLEM REPORT ASL2010:102 2010/05/25 ASL DCC Cory Gilbert ASL KIP IU 10/?HN, 10/?HE 2010,076,00:00:00 2010,076,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE C 4510 Channel has frequent spiking. The horizontal components of the STS-1 are pulsing randomly. The vertical component seems to be unaffected for the most part. The pulses are not readily visibly until the data are filtered. END **************************************************************************** DATA PROBLEM REPORT ASL2010:103 2010/05/25 ASL DCC Cory Gilbert ASL OTAV IU 00/?H1 2010,135,00:00:00 2010,135,00:00:00 Problem Description SPIKES SEED COMMENT REFERENCE C 4521 Channel displays regular pulsing. The N/S component of the STS-1 began pulsing during the last site visit. The size and period of the pulses remains quite constant, with the period being around 950 seconds. Field engineers are currently working on the problem. END **************************************************************************** DATA PROBLEM REPORT ASL2010:104 2010/05/25 ASL DCC Cory Gilbert ASL RAR IU 00/?H? 2010,068,00:00:00 2010,068,00:00:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 2006 Little or no data available. The 54000 was lost during the Q330 upgrade process. The instrument had to be shutdown to switch from the Q680 digitizer to the Q300. Unfortunately, it never came back. It will more than likely take the installation of a new sensor to fix the problem. END **************************************************************************** DATA PROBLEM REPORT ASL2010:105 2010/06/04 ASL DCC Cory Gilbert ASL PASC CI 00/?HN 2010,103,00:00:00 2010,103,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE C 4521 Channel displays regular pulsing. This instrument has been pulsing on the ?HN component for a little over a week now. There seems to be a period of about 1.3 hours on the pulses. NOTE: this is a correction for the last dpr because I named the channel ?H1 instead of ?HN END **************************************************************************** DATA PROBLEM REPORT IDA2011:008 2011/02/04 IDA DCC Erik Klimczak IDA ARU II *** 2010,298,00:00:00 2010,328,00:00:00 Problem Description OTHER IDA station ARU was down from day 2010,298-05:40 to 2010,328 due to faulty circuit boards in the DAS. END **************************************************************************** DATA PROBLEM REPORT IDA2011:009 2011/02/04 IDA DCC Erik Klimczak IDA AAK II BB*10 2010,343,00:00:00 2010,343,00:00:00 Problem Description OTHER The BB*10 channels from the STS-2 seismometer are showing long period pulses starting around day 2010,343 for reasons yet to be determined. END **************************************************************************** DATA PROBLEM REPORT IDA2011:006 2011/02/04 IDA DCC Erik Klimczak IDA RPN II *** 2010,348,00:00:00 2010,348,00:00:00 Problem Description OTHER IDA station RPN is down due to the GPS clock becoming unlocked and problems with the digitizer. The station operator has cycled power and reconfigured connections to the GPS clock, and has been requested to cycle power to the DAS. A trip to upgrade the station is being prepared. END PROBLEM RESOLUTION REPORT IDA2011:006 2011/04/11 IDA Erik Klimczak Description of Problem Resolution RESOLUTION The station is back on-line as of day 2011,099-12:34 after an IDA engineer visited the station and upgraded it to a Quanterra Q330HR system. END **************************************************************************** DATA PROBLEM REPORT IDA2011:007 2011/02/04 IDA DCC Erik Klimczak IDA PFO II *** 2010,286,00:00:00 2010,286,00:00:00 Problem Description OTHER There are long period pulses on the vertical channels from the STS-1 seismometer since day 2010,286, for reasons yet to be determined. END PROBLEM RESOLUTION REPORT IDA2011:007 2011/02/23 IDA Erik Klimczak Description of Problem Resolution RESOLUTION Data quality for the STS-1 seismometer improved after an IDA engineer visited the station and replaced the base plate for the STS-1V and re-installed the seismometer. The long period pulses appear to have been caused by the seismometer losing vacuum. END **************************************************************************** DATA PROBLEM REPORT IDA2011:011 2011/02/04 IDA DCC Erik Klimczak IDA MSEY II *** 2011,014,00:00:00 2011,014,00:00:00 Problem Description OTHER IDA station MSEY is down as of day 2011,014-1700 due to problems with the DAS that are yet to be determined. In addition, there is a power outage at the station. The power company has removed power lines to the station. The station will remain down until power is restored. END PROBLEM RESOLUTION REPORT IDA2011:011 2011/12/15 IDA Erik Klimczak Description of Problem Resolution RESOLUTION Data acquisition at IDA station MSEY was restored on day 2011,210-11:57 after an IDA engineer visited the station and restored power and upgraded it to a Quanterra Q330HR system. END **************************************************************************** DATA PROBLEM REPORT IDA2011:012 2011/02/04 IDA DCC Erik Klimczak IDA SHEL II *** 2011,012,00:00:00 2011,012,00:00:00 Problem Description OTHER IDA station SHEL is down as of day 2011,012-13:55 due to communication problems between the DAS and the ARS caused by failure of the remote power supply. A new power supply has been shipped to the station. END PROBLEM RESOLUTION REPORT IDA2011:012 2011/04/11 IDA Erik Klimczak Description of Problem Resolution RESOLUTION The station is back on-line as of day 2011,100-09:40 after the station operator replaced the remote power supply. END **************************************************************************** DATA PROBLEM REPORT IDA2011:010 2011/02/04 IDA DCC Erik Klimczak IDA MSEY II BBE-10 2011,012,00:00:00 2011,012,00:00:00 Problem Description OTHER The East-West channels from the CMG-3T seismometer are non-seismic as of day 2011,012-2021 for reasons yet to be determined. END PROBLEM RESOLUTION REPORT IDA2011:010 2012/06/28 IDA Erik Klimczak Description of Problem Resolution RESOLUTION The East-West channels from the CMG-3T seismometer are seismic and back in normal operating range as of day 2012,096-07:29 after IDA engineers visited the station and re-centered the CMG-3T seismometer. END **************************************************************************** DATA PROBLEM REPORT IDA2011:015 2011/04/11 IDA DCC Erik Klimczak IDA PALK II *** 2011,094,00:00:00 2011,094,00:00:00 Problem Description OTHER The station is down as of day 2011,094-11:37 due to a faulty power supply. A new power supply is being shipped to the station. END PROBLEM RESOLUTION REPORT IDA2011:015 2011/06/17 IDA Erik Klimczak Description of Problem Resolution RESOLUTION IDA station PALK is back on-line as of day 2011,125-16:59 after the station operator replaced the power supply shipped from UCSD. END **************************************************************************** DATA PROBLEM REPORT IDA2011:016 2011/04/15 IDA DCC Erik Klimczak IDA MBAR II *** 2011,072,00:00:00 2011,072,00:00:00 Problem Description OTHER IDA station MBAR is down as of about day 2011,072 due to problems with the station computer that are yet to be determined. END PROBLEM RESOLUTION REPORT IDA2011:016 2011/06/17 IDA Erik Klimczak Description of Problem Resolution RESOLUTION IDA station MBAR is back on-line as of day 2011,142-07:01 after the station operator replaced the ISP and network switches with those given to him on his visit to UCSD. END **************************************************************************** DATA PROBLEM REPORT IDA2011:013 2011/03/03 IDA DCC Erik Klimczak IDA HOPE II BB*-00 2011,055,00:00:00 2011,055,00:00:00 Problem Description OTHER Data quality for all channels from the STS-2 is poor since day 2010,055-02:30 for reasons yet to be determined. The channels are showing excessive spiking and noise. A trip to upgrade the station is underway. END PROBLEM RESOLUTION REPORT IDA2011:013 2011/04/06 IDA Erik Klimczak Description of Problem Resolution RESOLUTION Data quality for all channels from the STS-2 improved on day 2011,072-12:00 after an IDA engineer visited and upgraded the station to a Quanterra Q330HR system and replaced the STS-2. END **************************************************************************** DATA PROBLEM REPORT IDA2011:014 2011/04/06 IDA DCC Erik Klimczak IDA ALE II *** 2011,049,00:00:00 2011,091,00:00:00 Problem Description OTHER The station was down from day 2011,049-12:58 to day 2011,091 due to the GPS clock becoming unlocked. The station operator reports restoring normal data acquisition after cycling power to the GPS on day 2011,091. END **************************************************************************** DATA PROBLEM REPORT ASL2010:100 2010/05/04 ASL DCC Cory Gilbert ASL HNR IU 00/?H? 2010,114,00:00:00 2010,114,00:00:00 Problem Description NOISE SEED COMMENT REFERENCE C 4420 Channel data quality is fair. During the Q330 upgrade trip, the original plan was to remove the 54000 that was already in place and replace it with another, as well as replace the existing STS-2-HG with an STS-1-SG. During the trip, the original 54000 became stuck in the borehole. At this point, the best option was to re-install the original STS-2-HG as the primary instrument along with the STS-2-SG as the secondary. Based on the site conditions, a long (~200ft) cable is necessary to install the STS-2 on the pier. Because of the original scope, there was only one long cable on-site. As a result, the primary instrument (STS-2-HG) could not be installed on the pier with the other instrument. Currently it is installed close enough to the rest of the eqipment on site to cause large amount of noise. Expect a noisy primary instrument until the original 54000 can be replaced with a new instrument according to the original scope of the upgrade. END **************************************************************************** DATA PROBLEM REPORT ASL2010:101 2010/05/04 ASL DCC Cory Gilbert ASL TRQA IU 10/?HZ 2009,156,00:00:00 2009,156,00:00:00 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4605 Channel has low sensitivity. The vertical component of the CMG is going through intermittent periods where it is displaying half a double-ended output. There is not an obvious period, or any other indicator that triggers it. Usually it is fairly short lived, and the data comes back to normal. Multiple attempts to correct this have not been successful. This will probably require a station visit. Data quality is affected during this periods. END **************************************************************************** DATA PROBLEM REPORT IDA2011:001 2011/02/04 IDA DCC Erik Klimczak IDA ALE II *** 2010,221,00:00:00 2010,263,00:00:00 Problem Description OTHER IDA station ALE was down from day 2010,221-16:44 to 2010,263-11:54 due to problems with the station processor. Data acquisition was restored after the station operator replaced the station processor. END **************************************************************************** DATA PROBLEM REPORT IDA2011:004 2011/02/04 IDA DCC Erik Klimczak IDA HOPE II *** 2010,306,00:00:00 2010,311,00:00:00 Problem Description OTHER IDA station HOPE was down from day 2010,306-03:22 to 2010,311-15:33 due to problems with the STS-2. The masses for the STS-2 were saturated. The channels for the STS-2 were restored to normal operating range after the station operator re-centered the masses for the STS-2. END **************************************************************************** DATA PROBLEM REPORT IDA2011:005 2011/02/04 IDA DCC Erik Klimczak IDA MSVF II *** 2010,351,00:00:00 2010,351,00:00:00 Problem Description OTHER IDA station MSVF has been down intermittently from day 2010,351 to 2010,355, and 2011,003 to present due to the GPS clock becoming unlocked. The station operator has cycled power to the GPS clock. A new GPS clock has been shipped to the station. END PROBLEM RESOLUTION REPORT IDA2011:005 2011/04/06 IDA Erik Klimczak Description of Problem Resolution RESOLUTION IDA station MSVF is back on-line as of day 2011,068-01:43 after the station operator replaced the GPS clock with one shipped from UCSD. END **************************************************************************** DATA PROBLEM REPORT IDA2011:002 2011/02/04 IDA DCC Erik Klimczak IDA ALE II *** 2010,275,00:00:00 2010,337,00:00:00 Problem Description OTHER The mass positions for the STS-2 were saturated from day 2010,275-08:00 to 2010,337-14:29. The channels for the STS-2 were restored to normal operating range after the station operator re-centered the masses for the STS-2. END **************************************************************************** DATA PROBLEM REPORT IDA2011:003 2011/02/04 IDA DCC Erik Klimczak IDA CMLA II BB*-10 2010,294,00:00:00 2010,294,00:00:00 Problem Description DEAD CHANNEL All channels from the CMG-3T seismometer are non-seismic due to a faulty CMG-3T sensor. END PROBLEM RESOLUTION REPORT IDA2011:003 2011/12/15 IDA Erik Klimczak Description of Problem Resolution RESOLUTION All channels from the CMG-3T seismometer have been restored as of day 2011,315-13:29 after an IDA engineer visited the station and replaced the faulty CMG-3T seismometer. END **************************************************************************** DATA PROBLEM REPORT ASL2010:007 2010/01/25 ASL DCC Cory Gilbert ASL COLA IU ALL CHANNELS 2009,190,00:00:00 2006,181,00:00:00 Problem Description OTHER This station has been upgraded to a Q330 digitizer. New metadata are available. END **************************************************************************** DATA PROBLEM REPORT ASL2010:008 2010/01/25 ASL DCC Cory Gilbert ASL COR IU ALL CHANNELS 2009,269,00:00:00 2006,181,00:00:00 Problem Description OTHER This station has been upgraded to a Q330 digitizer. New metadata are available. A Trillium 240 was added to the station. END **************************************************************************** DATA PROBLEM REPORT ANSS2010:019 2010/03/22 ANSS DCC Leo Sandoval ANSS MNTX US *H* 2010,039,15:30:00 2010,049,20:30:00 Problem Description OTHER SEED COMMENT REFERENCE S 2515 Data dropouts US_MNTX Data Dropouts Noted : 2010,039 15:30 --> 049,20:30 END **************************************************************************** DATA PROBLEM REPORT ASL2010:124 2010/12/02 ASL DCC Tyler Storm ASL DWPF IU 10/?HZ 2010,267,00:00:00 2010,267,00:00:00 Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE C 4509 Channel has elevated low frequency noise levels. Data have pulses (first positive, then negative) just short of every hour from 00 UTC to 12 UTC daily. END **************************************************************************** DATA PROBLEM REPORT ASL2010:003 2010/01/25 ASL DCC Cory Gilbert ASL ADK IU ALL CHANNELS 2009,200,00:00:00 2006,181,00:00:00 Problem Description OTHER This station has been upgraded to a Q330 digitizer. New metadata are available. A Trillium 240 was added to the station, as was a wind powered generator. END **************************************************************************** DATA PROBLEM REPORT ASL2010:004 2010/01/25 ASL DCC Cory Gilbert ASL ANMO IU ALL CHANNELS 2008,182,20:00:00 2006,181,00:00:00 Problem Description OTHER This station has been upgraded to a Q330 digitizer. New metadata are available. END **************************************************************************** DATA PROBLEM REPORT ASL2010:005 2010/01/25 ASL DCC Cory Gilbert ASL BBSR IU ALL CHANNELS 2008,214,00:00:00 2006,181,00:00:00 Problem Description OTHER This station has been upgraded to a Q330 digitizer. New metadata are available. An STS-2-HG was added to the station. END **************************************************************************** DATA PROBLEM REPORT ASL2010:006 2010/01/25 ASL DCC Cory Gilbert ASL CHTO IU ALL CHANNELS 2009,262,14:35:27 2006,181,00:00:00 Problem Description OTHER This station has been upgraded to a Q330 digitizer. New metadata are available. END **************************************************************************** DATA PROBLEM REPORT ANSS2010:014 2010/03/22 ANSS DCC Leo Sandoval ANSS AAM US *H* 2010,039,15:30:00 2010,049,20:30:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE S 2515 Data dropouts US_BMO Excessive Data Dropouts 2010,039,15:30 -> 049,20:30 END **************************************************************************** DATA PROBLEM REPORT ANSS2010:013 2010/03/19 ANSS DCC Leo Sandoval ANSS NATX US *H* 2010,007,20:52:00 2010,007,20:52:00 Problem Description OTHER SEED COMMENT REFERENCE S 2501 Data unusable. US_NATX Instrument on Stops' No useable data 2010,007,20:52 -> ?? END **************************************************************************** DATA PROBLEM REPORT IDA2011:028 2011/09/27 IDA DCC Erik Klimczak IDA KAPI II *** 2011,221,00:00:00 2011,224,00:00:00 Problem Description OTHER IDA station KAPI was down from day 2011,221-13:47 to 2011,224-05:47 due to a power outage at the station. Data acquisition resumed when power was restored. END **************************************************************************** DATA PROBLEM REPORT ANSS2010:012 2010/03/19 ANSS DCC Leo Sandoval ANSS BINY US *H* 2010,039,15:30:00 2010,049,20:30:00 Problem Description OTHER SEED COMMENT REFERENCE S 2515 Data dropouts US_BINY large number of data dropouts due to storm systems passing. 2010, 039,15:30 -> 049, 20:30 END **************************************************************************** DATA PROBLEM REPORT IDA2011:029 2011/09/27 IDA DCC Erik Klimczak IDA MBAR II *** 2011,243,00:00:00 2011,243,00:00:00 Problem Description OTHER IDA station MBAR is down as of day 2011,243-19:06 due to communication problems between the DAS and the ISP. The station operator visited the station to investigate and cycle power to the DAS. However, the station remains down due to suspected DAS failure. A replacement DAS is being prepared to ship to the station. END PROBLEM RESOLUTION REPORT IDA2011:029 2012/01/24 IDA Erik Klimczak Description of Problem Resolution RESOLUTION IDA station MBAR is back on-line as of day 2012,023-08:07 after the station operator replaced the DAS and Ethernet extender. END **************************************************************************** DATA PROBLEM REPORT ANSS2010:011 2010/03/11 ANSS DCC Leo Sandoval ANSS VNDA GT *H* 2010,043,14:40:00 2010,050,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE S 2515 Data dropouts GT_VNDA Excessive Data Gaps 2010,043,14:40 -> 050,00:00 END **************************************************************************** DATA PROBLEM REPORT ANSS2010:018 2010/03/22 ANSS DCC Leo Sandoval ANSS LBNH US *H* 2010,039,15:30:00 2010,049,20:30:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE S 2515 Data dropouts US_LBNH Data Dropouts Noted: 2010,039,15:30 --> 049,20:30 END **************************************************************************** DATA PROBLEM REPORT ANSS2010:017 2010/03/22 ANSS DCC Leo Sandoval ANSS LAO US *H* 2010,039,15:30:00 2010,049,20:30:00 Problem Description OTHER SEED COMMENT REFERENCE S 2515 Data dropouts US_LAO Data Dropouts Noted: 2010,039,15:30 --> 049,20:30 END **************************************************************************** DATA PROBLEM REPORT ANSS2010:016 2010/03/22 ANSS DCC Leo Sandoval ANSS BW06 US *H* 2010,039,15:30:00 2010,049,20:30:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE S 2515 Data dropouts US_BW06 Data Dropouts Noted: 2010,039,15:30 --> 049,20:30 END **************************************************************************** DATA PROBLEM REPORT ANSS2010:015 2010/03/22 ANSS DCC Leo Sandoval ANSS BOZ US *H* 2010,039,15:30:00 2010,049,20:30:00 Problem Description OTHER SEED COMMENT REFERENCE S 2515 Data dropouts US_BOZ Data Dropouts noted 2010,039,15:30 --> 049,20:30 END **************************************************************************** DATA PROBLEM REPORT IDA2011:033 2011/11/10 IDA DCC Erik Klimczak IDA RAYN II BHZ-00,LHZ-00 2011,276,00:00:00 2011,276,00:00:00 Problem Description DEAD CHANNEL The vertical channels from the CMG-3TB seismometer are non-seismic. Attempts to re-center the CMG-3TB have been unsuccessful. END **************************************************************************** DATA PROBLEM REPORT IDA2011:034 2011/11/10 IDA DCC Erik Klimczak IDA JTS II *** 2011,272,00:00:00 2011,272,00:00:00 Problem Description OTHER IDA station JTS is down due to problems with the GPS clocks. A trip by an IDA engineer to replace the GPS antennas and the digitizers is being planned. END PROBLEM RESOLUTION REPORT IDA2011:034 2011/12/15 IDA Erik Klimczak Description of Problem Resolution RESOLUTION IDA station JTS is back on-line as of day 2011,318-20:46 after an IDA engineer visited the station and replaced the GPS antenna modules and cables. END **************************************************************************** DATA PROBLEM REPORT IDA2011:031 2011/09/27 IDA DCC Erik Klimczak IDA JTS II BHZ-00,LHZ-00 2011,241,00:00:00 2011,241,00:00:00 Problem Description DEAD CHANNEL The vertical channels from the STS-1 seismometer are not connected due to a faulty seismometer. The seismometer has been shipped back to UCSD for repair and replacement. END PROBLEM RESOLUTION REPORT IDA2011:031 2011/12/15 IDA Erik Klimczak Description of Problem Resolution RESOLUTION The vertical channels from the STS-1 seismometer have been restored as of day 2011,319-20:14 after an IDA engineer visited the station and replaced the seismometer. END **************************************************************************** DATA PROBLEM REPORT IDA2011:032 2011/09/27 IDA DCC Erik Klimczak IDA KAPI II BH*-10,LH*-10 2011,256,00:00:00 2011,256,00:00:00 Problem Description OTHER All channels from the CMG-3T seismometer are non-seismic as of day 2011,256-21:17 for reasons yet to be determined. END PROBLEM RESOLUTION REPORT IDA2011:032 2013/03/07 IDA Erik Klimczak Description of Problem Resolution RESOLUTION All channels from the CMG-3T are seismic as of day 2013,061-03:57 after an IDA engineer visited the station and replaced the CMG-3T seismometer. END **************************************************************************** DATA PROBLEM REPORT IDA2011:037 2011/12/23 IDA DCC Erik Klimczak IDA HOPE II LN200,EN200 2011,350,00:00:00 2011,350,00:00:00 Problem Description DEAD CHANNEL The East-West channels from the strong motion sensor at HOPE are non-seismic for reasons yet to be determined. END **************************************************************************** DATA PROBLEM REPORT ANSS2010:021 2010/03/22 ANSS DCC Leo Sandoval ANSS RLMT US *H* 2010,039,15:30:00 2010,049,20:30:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE S 2515 Data dropouts US_RLMT Data Dropouts Noted: 2010,039,15:30 --> 049,20:30 END **************************************************************************** DATA PROBLEM REPORT ANSS2010:020 2010/03/22 ANSS DCC Leo Sandoval ANSS NHSC US *H* 2010,039,15:30:00 2010,049,20:30:00 Problem Description OTHER SEED COMMENT REFERENCE S 2515 Data dropouts US_NHSC Data DROPOUTS NOTED: 2010, 039,15:30 --> 049,20:30 END **************************************************************************** DATA PROBLEM REPORT IDA2011:035 2011/12/15 IDA DCC Erik Klimczak IDA JTS II BH*-10,LH*-10 2011,309,00:00:00 2011,348,00:00:00 Problem Description OTHER Data quality from the STS-2 seismometer was poor from day 2011,309 until day 2011,348 due to a faulty STS-2 seisometer. Data quality improved after the station operator replaced the STS-2 seismometer. END **************************************************************************** DATA PROBLEM REPORT IDA2011:036 2011/12/23 IDA DCC Erik Klimczak IDA ABKT II *** 2011,288,00:00:00 2011,288,00:00:00 Problem Description OTHER IDA station ABKT is down as of day 2011,288-08:05 due to timing problems caused by a bug in the software for the GPS clock. END PROBLEM RESOLUTION REPORT IDA2011:036 2012/03/20 IDA Erik Klimczak Description of Problem Resolution RESOLUTION IDA station ABKT is back on-line as of day 2012,071-07:58 after an IDA engineer visited the station and replaced the GPS clock. END **************************************************************************** DATA PROBLEM REPORT ASL2010:120 2010/10/21 ASL DCC Cory Gilbert ASL GNI IU 00/?H2 2010,293,16:35:15 2010,293,16:35:15 Problem Description SPIKES SEED COMMENT REFERENCE C 4410 Channel data quality is poor. The STS-1 E/W is pulsing after a large spike at 2010,293,16:35:15. Long period data quality is suffering as a result. END **************************************************************************** DATA PROBLEM REPORT ASL2010:121 2010/10/21 ASL DCC Cory Gilbert ASL KMBO IU ?0/?H? 2010,291,00:00:00 2010,291,00:00:00 Problem Description NOISE SEED COMMENT REFERENCE C 4410 Channel data quality is poor. Horizontal components of both instruments have developed very coherent noise in the last several days. The vertical component of the STS-1 is also wandering. Field engineers are looking into these issues. END **************************************************************************** DATA PROBLEM REPORT ASL2010:122 2010/10/21 ASL DCC Cory Gilbert ASL GNI IU 00/?HZ 2010,293,16:42:33 2010,293,16:42:33 Problem Description SPIKES SEED COMMENT REFERENCE C 4410 Channel data quality is poor. The vertical component of the STS-1 has developed some pulsing in the last two days. The pulsing started out gradually beginning at 2010,293,16:42:33. Field engineers are looking into this. END **************************************************************************** DATA PROBLEM REPORT ASL2010:001 2010/01/21 ASL DCC Cory Gilbert ASL NWAO IU 00 -- ALL CHANNELS 2009,310,04:47:00 2006,181,00:00:00 Problem Description OTHER SEED COMMENT REFERENCE S 2007 Station down. The 54000 seismometer was lost on 2009,310,04:47 UTC. There are no data coming through. END **************************************************************************** DATA PROBLEM REPORT ASL2010:123 2010/10/26 ASL DCC Cory Gilbert ASL AFI IU 00/?H2 2010,295,14:58:51 2010,295,14:58:51 Problem Description VERY LARGE PULSE SEED COMMENT REFERENCE C 4400 Channel data quality is very poor. The STS-1's took a large pulse on 2010,295,14:58:51. The vertical and ?H1 components came back fine, but the ?H2 is now stuck in some sort of clipping free period with very high counts. Field engineers are working on this issue. END **************************************************************************** DATA PROBLEM REPORT ASL2010:002 2010/01/25 ASL DCC Cory Gilbert ASL KONO IU 00/?H1 2009,258,14:57:00 2006,181,00:00:00 Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE C 4815 Channel has long period noise. QC noticed some lp noise on the ?H1 component of the STS-1 directly after the upgrade. After reporting to the field team, some work was done at the station and the noise seemed to be calming down. However, it started to come back as a random pulsing. As of today, it is a very cyclic (approx 3000 second) pulsing. END **************************************************************************** DATA PROBLEM REPORT IDA2011:030 2011/09/27 IDA DCC Erik Klimczak IDA JTS II *** 2011,140,00:00:00 2011,241,00:00:00 Problem Description OTHER IDA station JTS was decommissioned from day 2011,140 to 2011,241 for replacement of the pier and recording building. The station was brought back on-line after IDA enginneers visited the station and installed all equipment on the new pier and in the new recording building. END **************************************************************************** DATA PROBLEM REPORT ASL2010:117 2010/09/22 ASL DCC Cory Gilbert ASL INCN IU 00/?H? 2010,228,09:09:00 2010,228,09:09:00 Problem Description DEAD CHANNEL SEED COMMENT REFERENCE C 4010 Channel is down. As of 2010,228,09:09:00 the STS-1 is down on all three components. The SIB was replaced, but this did not solve the problem completely. Field engineers are working on this issue. END **************************************************************************** DATA PROBLEM REPORT ASL2010:118 2010/09/30 ASL DCC Cory Gilbert ASL SSE IC 00/?HE 2010,239,12:39:00 2010,239,12:39:00 Problem Description OTHER SEED COMMENT REFERENCE C 4400 Channel data quality is very poor. Beginning on approximately 2010,239,12:39 the STS-1 E/W is showing long period noise. Field engineers are currently working on this issue. END **************************************************************************** DATA PROBLEM REPORT ASL2010:119 2010/10/14 ASL DCC Cory Gilbert ASL CTAO IU 00/?H? 2010,286,22:34:00 2010,286,22:34:00 Problem Description NOISE SEED COMMENT REFERENCE C 4400 Channel data quality is very poor. The STS-1's at CTAO show a gap in the data starting on 2010,286,22:34:00 lasting for about 6 hours. When the data comes back, there are large pulses and swings in the data. Field engineers are currently working on the problem. END **************************************************************************** DATA PROBLEM REPORT ASL2010:113 2010/07/26 ASL DCC Cory Gilbert ASL TEIG IU 10/?HZ, 10/?H1 2010,179,22:31:03 2010,179,22:31:03 Problem Description INVALID RESPONSE SEED COMMENT REFERENCE C 4605 Channel has low sensitivity. The CMG ?HZ and ?H1 components have begun showing a half a double ended output after a pulse in the data. It stayed the same until about 2010,203 when the ?H1 component looks to have completely died. Field engineers are currently working on it. END **************************************************************************** DATA PROBLEM REPORT ASL2010:114 2010/07/28 ASL DCC Cory Gilbert ASL PAYG IU 00/?H2 2010,201,04:14:11 2010,201,04:14:11 Problem Description NOISE SEED COMMENT REFERENCE C 4400 Channel data quality is very poor. On 2010,201,04:14:11 the ?H2 component of the 54000 took a large negative kick and has shown high levels of long period noise ever since. There have also been numerous large negative kicks between then and now. ASL field engineers are currently looking into the problem. END **************************************************************************** DATA PROBLEM REPORT ASL2010:115 2010/09/09 ASL DCC Tyler Storm ASL WAKE IU * 2010,062,00:00:00 2010,062,00:00:00 Problem Description INCORRECT TIME SEED COMMENT REFERENCE S 451 Timing MAY be in error, as clock is unlocked. Timing quality is in question. I cannot confirm any timing problems but the system is not receiving the GPS signal. END **************************************************************************** DATA PROBLEM REPORT ASL2010:116 2010/09/10 ASL DCC Tyler Storm ASL GRFO IU ?HE 2010,220,00:00:00 2010,220,00:00:00 Problem Description NOISE SEED COMMENT REFERENCE C 4815 Channel has long period noise. We begin to see long-period noise on the E/W channels of the KS36000 around this time. The noise appears to be getting worse (and more contant) over time. END **************************************************************************** DATA PROBLEM REPORT IDA2011:019 2011/06/17 IDA DCC Erik Klimczak IDA MBAR II BHN-10,LHN-10,VHN-10 2011,142,00:00:00 2011,142,00:00:00 Problem Description OTHER The North-South channels from the CMG-3T are flat-lined as of day 2011,142-07:01. A warm re-set of the DAS did not resolve the problem. The station operator has been requested to re-center the masses for the CMG-3T seismometer. END PROBLEM RESOLUTION REPORT IDA2011:019 2011/07/22 IDA Erik Klimczak Description of Problem Resolution RESOLUTION The North-South channels for the CMG-3T are back in normal operating range as of day 2011,186-11:33, after the station operator re-centered the masses for the CMG-3T. END **************************************************************************** DATA PROBLEM REPORT ANSS2010:025 2010/08/14 ANSS DCC Leo Sandoval ANSS PLCA GT 00_BH* 2010,174,04:24:00 2010,174,04:24:00 Problem Description SPIKES SEED COMMENT REFERENCE S 2501 Data unusable. GT_PLCA 2010<175,04:24 00_BH* started spiking on all components cause unknown Data not useable END **************************************************************************** DATA PROBLEM REPORT ANSS2010:024 2010/06/23 ANSS DCC Leo Sandoval ANSS GOGA US *H* 2010,150,00:36:00 2010,173,20:16:00 Problem Description DATA DROPOUTS SEED COMMENT REFERENCE S 2507 Station down. US_GOGA No data 23 days Comm problem No DATA 2010,150:00:36:00 -> 173,20:16:00 END **************************************************************************** DATA PROBLEM REPORT IDA2011:017 2011/04/26 IDA DCC Erik Klimczak IDA FFC II *** 2011,116,00:00:00 2011,116,00:00:00 Problem Description OTHER Data acquisition at IDA station FFC is intermittent due to a power problem at the station. IDA engineers are working with the station operator to resolve the problem. END PROBLEM RESOLUTION REPORT IDA2011:017 2011/06/17 IDA Erik Klimczak Description of Problem Resolution RESOLUTION The station is back online as of day 2011,138-13:19 after the station operator replaced the power supply IDA engineers shipped from UCSD. END **************************************************************************** DATA PROBLEM REPORT ANSS2010:023 2010/06/07 ANSS DCC Leo Sandoval ANSS TGUH CU *H* 2010,121,00:00:00 2010,141,16:44:00 Problem Description OTHER SEED COMMENT REFERENCE S 2515 Data dropouts CU_TGUH Comm Issues No or Gappy Data 2010, 121,00:00 -> 141,16:44:00 20.7 days Change to LOC codes on 2010, 148,15:58 END **************************************************************************** DATA PROBLEM REPORT IDA2011:018 2011/06/17 IDA DCC Erik Klimczak IDA AAK II *** 2011,139,00:00:00 2011,141,00:00:00 Problem Description OTHER IDA station AAK was down intermittently from day 2011,139-12:22 to 2011,140-03:57 and 2011,140-11:53 to 2011,141-02:18 due to power outages caused by inclement weather. END **************************************************************************** DATA PROBLEM REPORT ANSS2010:022 2010/05/03 ANSS DCC Leo Sandoval ANSS WMOK US HR_*H* 2010,094,22:48:00 2010,094,23:58:00 Problem Description NOISE US_WMOK HR_channels reached Full Scale and 20 S. surface energy from Baja Event 7.0 2010,094,22:48:00 clipped on several cycles END **************************************************************************** DATA PROBLEM REPORT ANSS2010:029 2010/12/16 ANSS DCC Leo Sandoval ANSS AAM US *H* 2010,305,00:00:00 2010,350,19:00:00 Problem Description OTHER SEED COMMENT REFERENCE S 2501 Data unusable. US_MCWV NO Data 2010,305,00:00 ->> 350,19:00 STS-2 Host Box Failure Instrument on Stops Replaced 16 Dec 2010 Station Operational END **************************************************************************** DATA PROBLEM REPORT ANSS2010:028 2010/12/07 ANSS DCC Leo Sandoval ANSS RLMT US *H* 2010,302,15:24:00 2010,313,18:21:00 Problem Description OTHER SEED COMMENT REFERENCE S 2501 Data unusable. US_RLMT No useable data 2010,302,15:24 --> 313,18:21 Instrument on Stops ReCentered 313, 18:21 Operational END **************************************************************************** DATA PROBLEM REPORT ANSS2010:027 2010/11/30 ANSS DCC Leo Sandoval ANSS NATX US *H* 2010,165,15:27:00 2010,165,15:27:00 Problem Description OTHER SEED COMMENT REFERENCE S 2501 Data unusable. US_NATX STS-2 on stop 2010,165,15:27 lost capture 2010,334,18:50 W component will not respond to Re Center Command Large offsets present on channel Z= 5.7 E06 N= -7.0E06 E=4.08E06 counts Needs Physical Re Leveling No Useable data 2010 165->334 END **************************************************************************** DATA PROBLEM REPORT ANSS2010:026 2010/09/03 ANSS DCC Leo Sandoval ANSS GOGA US *H* 2010,212,23:25:00 2010,212,23:25:00 Problem Description OTHER SEED COMMENT REFERENCE S 2507 Station down. IU_GOGA 2010,212,23:25 last data available: Comm problems? Awaiting maint team vist END **************************************************************************** DATA PROBLEM REPORT IDA2011:022 2011/06/17 IDA DCC Erik Klimczak IDA TAU II *** 2011,142,00:00:00 2011,145,00:00:00 Problem Description OTHER IDA station TAU was down from day 2011,142-08:23 to 2011,145-00:39 due to problems with the microwave link between the DASs and station computer. The station came back on-line after the station operator replaced the link's power supply. END **************************************************************************** DATA PROBLEM REPORT IDA2011:023 2011/06/17 IDA DCC Erik Klimczak IDA PALK II BH*-00,LH*-00 2011,125,00:00:00 2011,125,00:00:00 Problem Description OTHER There is high background noise on all channels from the KS54000 seismometer for reasons yet to be determined. The noise has worsened since the station operator replaced the power supply. END **************************************************************************** DATA PROBLEM REPORT IDA2011:020 2011/06/17 IDA DCC Erik Klimczak IDA MBAR II WDO 2011,142,00:00:00 2011,142,00:00:00 Problem Description OTHER The WDO barometer channel is not being acquired as of day 2011,142-07:01 due to problems with the USB port on the ISP. END PROBLEM RESOLUTION REPORT IDA2011:020 2012/05/04 IDA Erik Klimczak Description of Problem Resolution RESOLUTION The barometer was replaced when an IDA engineer upgraded the station on day 2012,109-09:07. END **************************************************************************** DATA PROBLEM REPORT IDA2011:021 2011/06/17 IDA DCC Erik Klimczak IDA MBAR II *** 2011,144,00:00:00 2011,165,00:00:00 Problem Description OTHER IDA station MBAR was down from day 2011,144-17:08 to 2011,165-07:19 due to problems with the DAS. Data acquisition was restored after the station operator cycled power to the DAS. END **************************************************************************** DATA PROBLEM REPORT IDA2011:026 2011/07/22 IDA DCC Erik Klimczak IDA KDAK II BHN-00,LHN-00,VHN-00 2009,223,00:00:00 2009,223,00:00:00 Problem Description OTHER The output of the KS-54000 North-South channel has been variable and anomalously low since day 2009,223 for unknown causes believed to be related to the sensor's downhole electronics. END **************************************************************************** DATA PROBLEM REPORT IDA2011:027 2011/07/22 IDA DCC Erik Klimczak IDA COCO II BH100,LH100 2011,189,00:00:00 2011,189,00:00:00 Problem Description OTHER Data quality for the North-South channels from the KS-54000 seismometer is poor as of day 2011,189-17:30 for reasons yet to be determined. END **************************************************************************** DATA PROBLEM REPORT IDA2011:024 2011/07/22 IDA DCC Erik Klimczak IDA MBAR II *** 2011,172,00:00:00 2011,186,00:00:00 Problem Description OTHER IDA station MBAR was down from day 2011,172-20:20 to 2011,186-11:33 due to problems with the DAS. Data acquisition was restored after the station operator cycled power to the DAS. END **************************************************************************** DATA PROBLEM REPORT ANSS2010:030 2010/12/21 ANSS DCC Leo Sandoval ANSS ECSD US *H* 2010,323,17:55:00 2010,323,17:55:00 Problem Description OTHER SEED COMMENT REFERENCE S 2515 Data dropouts IW_FXWY No data after: 2010,323,17:55 ->> Await Maint Trip Heavy Snow on Solar Panels END **************************************************************************** DATA PROBLEM REPORT IDA2011:025 2011/07/22 IDA DCC Erik Klimczak IDA TAU II *** 2011,170,00:00:00 2011,170,00:00:00 Problem Description OTHER There is excessive background noise for data from all sensors for reasons yet to be determined. The noise is electromagnetic in nature and suspected from an external source. END PROBLEM RESOLUTION REPORT IDA2011:025 2011/12/15 IDA Erik Klimczak Description of Problem Resolution RESOLUTION Data quality at IDA station TAU improved and the excessive background noise ceased on day 2011,227-00:00. END **************************************************************************** DATA PROBLEM REPORT ASL2010:110 2010/07/08 ASL DCC Tyler Storm ASL WCI IU 00/* 2010,188,13:19:40 2010,188,13:19:40 Problem Description DEAD CHANNEL The STS-1 data channels are currently digitizer noise. We pulled out the STS-1 instruments on 2010,188 and brought them back to the lab for testing. Once we have verified we have a good response from these instruments we will re-install. END **************************************************************************** DATA PROBLEM REPORT ASL2010:111 2010/07/12 ASL DCC Tyler Storm ASL GUMO IU * 2010,174,00:00:00 2010,174,00:00:00 Problem Description INCORRECT TIME Timing should be considered suspect during this time frame. END **************************************************************************** DATA PROBLEM REPORT ASL2010:112 2010/07/22 ASL DCC Cory Gilbert ASL XMAS IU 00/?H? 2010,202,03:52:17 2010,202,03:52:17 Problem Description LOW FREQUENCY NOISE SEED COMMENT REFERENCE C 4400 Channel data quality is very poor. Beginning on 2010,202,03:52:17 the primary STS-2 is very ugly. The mass position values seem reasonable, but they do not match the trend of those of the secondary STS-2 at all. Field engineers are looking into it. END **************************************************************************** From eklimczak@ucsd.edu Tue Jan 19 14:51:23 2016 Return-Path: Received: from norman.iris.washington.edu (norman.iris.washington.edu [192.168.166.28]) by marvin2.iris.washington.edu (8.14.4/8.14.4) with ESMTP id u0JMpNx2001510 for ; Tue, 19 Jan 2016 14:51:23 -0800 Received: from barracuda.iris.washington.edu (mailin01.iris.washington.edu [192.168.167.28]) by norman.iris.washington.edu (8.14.4/8.14.4) with ESMTP id u0JMpKLp014619 for ; Tue, 19 Jan 2016 14:51:22 -0800 Received: from iport-acv3-out.ucsd.edu (iport-acv3-out.ucsd.edu [132.239.0.4]) by barracuda.iris.washington.edu with ESMTP id HecahQIUmbPGeaCH; Tue, 19 Jan 2016 14:51:19 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=ucsd.edu; i=@ucsd.edu; q=dns/txt; s=041709-iport; t=1453243881; x=1484779881; h=from:content-transfer-encoding:subject:date:message-id: cc:to:mime-version; bh=YLvmF1j5RVmCEzCEYjoGKBsVP8QW/oMUgh5r1aap5qc=; b=AK27I2YFDzC7RhhZ+RNlknuuuX3HLkYLoIPyQt2fLz2CI8LkTAUqZzYF u1gfDlluzDTcWu+4Dhqukw5sTnsXCKS0p8li1xEDika7u89NRdNMgFwXv LoD0K6VLwsMVZKj9IU1LzuKpihBjqm66KbXK7PdAMVYCdBJBVqvjIAZyT c=; X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: A2AjBQD2vJ5W/4j574ReDgsBAQEBDwEBAQGDCooVtF8ThXyBSDwQAQEBAQEBAXYUhHU/iWy8fwGDCAEBCAEBAQEBAQEZhjqCBoQqgnlognmBGwWHY4ZWPYgkjV+PAYNMixA5K4IegS1fhz8BAQE X-IPAS-Result: A2AjBQD2vJ5W/4j574ReDgsBAQEBDwEBAQGDCooVtF8ThXyBSDwQAQEBAQEBAXYUhHU/iWy8fwGDCAEBCAEBAQEBAQEZhjqCBoQqgnlognmBGwWHY4ZWPYgkjV+PAYNMixA5K4IegS1fhz8BAQE X-IronPort-AV: E=Sophos;i="5.22,319,1449561600"; d="scan'208";a="112208537" X-Spam-Status: No X-Spam-Level: Received: from act-bufferout-b1.ucsd.edu ([132.239.249.136]) by iport-acv3-out.ucsd.edu with ESMTP; 19 Jan 2016 14:49:57 -0800 Received: from eklimczak-eth1.ucsd.edu (eklimczak-eth1.ucsd.edu [132.239.153.127]) (using TLSv1 with cipher AES128-SHA (128/128 bits)) (No client certificate requested) (Authenticated sender: eklimczak@ad.ucsd.edu) by act-bufferout-b1.ucsd.edu (Postfix) with ESMTPSA id E41FA142974; Tue, 19 Jan 2016 14:49:55 -0800 (PST) From: Erik Klimczak Content-Type: text/plain; charset=us-ascii Subject: IDA2014:005 IDA2014:006 Date: Tue, 19 Jan 2016 14:49:55 -0800 Message-Id: <3864ED24-59BD-41B5-88D9-E3AEB3394015@ucsd.edu> Cc: Gillian Sharer , Dan Auerbach , Erik Klimczak To: qc@iris.washington.edu Mime-Version: 1.0 (Mac OS X Mail 7.3 \(1878.6\)) X-Mailer: Apple Mail (2.1878.6) X-Virus-Scanned: by bsmtpd at iris.washington.edu Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by marvin2.iris.washington.edu id u0JMpNx2001510 DATA PROBLEM REPORT IDA2014:005 2014/04/16 IDA DCC Erik Klimczak IDA PFO II BH*-00,LH*-00 2013,206 2014,069 Problem Description OTHER All channels from the STS-1 seismometers were showing high background noise with pulses at 30 seconds from day 2013,206 to 2014,069 due to a ground connection between the power supply and vault equipment. The pulsing ceased after the ground connection was removed. END DATA PROBLEM REPORT IDA2014:006 2014/04/23 IDA DCC Erik Klimczak IDA JTS II *** 2014,095 2014,113 Problem Description OTHER IDA station JTS was down from day 2014,095-21:00 to 2014,113-16:48 due to a failed power supply. Data acquisition was restored after the station operator replaced the power supply with one shipped from UCSD. END From eklimczak@ucsd.edu Tue Jan 19 15:08:18 2016 Return-Path: Received: from norman.iris.washington.edu (norman.iris.washington.edu [192.168.166.28]) by marvin2.iris.washington.edu (8.14.4/8.14.4) with ESMTP id u0JN8I6F014363 for ; Tue, 19 Jan 2016 15:08:18 -0800 Received: from barracuda.iris.washington.edu (mailin01.iris.washington.edu [192.168.167.28]) by norman.iris.washington.edu (8.14.4/8.14.4) with ESMTP id u0JN8Fox014995 for ; Tue, 19 Jan 2016 15:08:18 -0800 Received: from iport-acv3-out.ucsd.edu (iport-acv3-out.ucsd.edu [132.239.0.4]) by barracuda.iris.washington.edu with ESMTP id Gv4O3lth6kNQjo2g; Tue, 19 Jan 2016 15:08:15 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=ucsd.edu; i=@ucsd.edu; q=dns/txt; s=041709-iport; t=1453244896; x=1484780896; h=from:content-transfer-encoding:subject:date:message-id: cc:to:mime-version; bh=g8seomY7rZw1heIg5hmc9zimjJM/WGxtflPwcw8r874=; b=PjTuFanmGMsQsgCC/PRwStbK9F+lI5vjYAdhqgFNbATTlN3wpJQe+t7c ZQssMQDxVeoBZWT8xcX2CJx0EEpX6RNRNLaNrh5ztF1E4wErmmLijaJ3Z 1TYGbwRoH/N0fcB1vzQuLJlBR7ykDZaT+kjeolGDcO8E+wEAzR/gdiyqL 4=; X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: A2AlBQCgwJ5W/x0A74ReDgsBAQEBDwEBAQGDCooVtF8CEYV8gUg8EAEBAQEBAQF2FIR1P4lsvQQBgwgBAQgBAQEBAQEBGYY6ggaEKoJaHw1bgnmBGwWHa4ZOiGGNX48Bjlw5K4IegS1fhXaBSQEBAQ X-IPAS-Result: A2AlBQCgwJ5W/x0A74ReDgsBAQEBDwEBAQGDCooVtF8CEYV8gUg8EAEBAQEBAQF2FIR1P4lsvQQBgwgBAQgBAQEBAQEBGYY6ggaEKoJaHw1bgnmBGwWHa4ZOiGGNX48Bjlw5K4IegS1fhXaBSQEBAQ X-IronPort-AV: E=Sophos;i="5.22,319,1449561600"; d="scan'208";a="112217244" X-Spam-Status: No X-Spam-Level: Received: from act-bufferout-a2.ucsd.edu ([132.239.0.29]) by iport-acv3-out.ucsd.edu with ESMTP; 19 Jan 2016 15:08:15 -0800 Received: from eklimczak-eth1.ucsd.edu (eklimczak-eth1.ucsd.edu [132.239.153.127]) (using TLSv1 with cipher AES128-SHA (128/128 bits)) (No client certificate requested) (Authenticated sender: eklimczak@ad.ucsd.edu) by act-bufferout-a2.ucsd.edu (Postfix) with ESMTPSA id 09F0BFBD84; Tue, 19 Jan 2016 15:08:13 -0800 (PST) From: Erik Klimczak Content-Type: text/plain; charset=us-ascii Subject: IDA2014:007 IDA2014:008 IDA2014:009 IDA2014:010 Date: Tue, 19 Jan 2016 15:08:13 -0800 Message-Id: <97E9C558-3E88-400E-9EC3-84817E035D0A@ucsd.edu> Cc: Gillian Sharer , Dan Auerbach , Erik Klimczak To: qc@iris.washington.edu Mime-Version: 1.0 (Mac OS X Mail 7.3 \(1878.6\)) X-Mailer: Apple Mail (2.1878.6) X-Virus-Scanned: by bsmtpd at iris.washington.edu Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by marvin2.iris.washington.edu id u0JN8I6F014363 DATA PROBLEM REPORT IDA2014:007 2014/04/23 IDA DCC Erik Klimczak IDA KWAJ II *** 2014,093 2014,104 Problem Description OTHER IDA station KWAJ was down from day 2014,093-21:15 to 2014,104-20:14 due to a power outage. END DATA PROBLEM REPORT IDA2014:008 2014/08/13 IDA DCC Erik Klimczak IDA ALE II *** 2012,177 2014,143 Problem Description OTHER IDA station ALE was decommissioned on day 2012,177 for mold remediation of the recording room. The station was brought back online on day 2014,143 when IDA engineers visited the station and upgraded it to a Quanterra Q330HR system. END DATA PROBLEM REPORT IDA2014:009 2014/08/13 IDA DCC Erik Klimczak IDA PALK II *** 2014,120 2014,185 Problem Description OTHER IDA station PALK was down from day 2014,120-16:21 to 2014,185-04:39 due to damages to the digitizer, GPS, and Trillium 120PH seismometer caused by lightning. Data acquisition was restored after an IDA engineer visited the station and replaced both digitizers and the Trillium 120PH seismometer. END DATA PROBLEM REPORT IDA2014:010 2014/10/10 IDA DCC Erik Klimczak IDA FFC II BH*-10,LH*-10 2013,359 2014,267 Problem Description OTHER The output of the north component from the Trillium 240 seismometer gradually diminished beginning about day 2013,359 to 52% of full output by day 2014,092. An IDA engineer visited the station to replace the Trillium 240 seismometer on day 2014,267, and the faulty sensor has been sent to the manufacturer for repair. END From eklimczak@ucsd.edu Tue Jan 19 15:22:17 2016 Return-Path: Received: from norman.iris.washington.edu (norman.iris.washington.edu [192.168.166.28]) by marvin2.iris.washington.edu (8.14.4/8.14.4) with ESMTP id u0JNMHhp010538 for ; Tue, 19 Jan 2016 15:22:17 -0800 Received: from barracuda.iris.washington.edu (mailin01.iris.washington.edu [192.168.167.28]) by norman.iris.washington.edu (8.14.4/8.14.4) with ESMTP id u0JNMFle015228 for ; Tue, 19 Jan 2016 15:22:17 -0800 Received: from iport-acv4-out.ucsd.edu (iport-acv4-out.ucsd.edu [132.239.0.7]) by barracuda.iris.washington.edu with ESMTP id Z73X9eXUv9yINTGP; Tue, 19 Jan 2016 15:22:14 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=ucsd.edu; i=@ucsd.edu; q=dns/txt; s=041709-iport; t=1453245734; x=1484781734; h=from:content-transfer-encoding:subject:date:message-id: cc:to:mime-version; bh=obHXz2vfFOim3/G/HhWZP1+Dfmg6QxNtGdV6R2UqIjg=; b=HF8njh4u2rjxmW1CsJmGHOjlHi7zuBa//tyrj7PLII5AUtcIqdFYuZWt 0zouPZUYzPMKyMSD3NI9fnK0mcGqW7XgnZWo0/9vn+NPuZrRZ+hakEkU7 WTbp1kcA0yKODGV3KbW+2R0YkGsD6iWhN7y5CkXqpQvtZ/cFFQnSQHBiG 8=; X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: A2AABQA3xJ5W/xT574ReDgsBAQEBDwEBAQGNH7RfE4V8gUQ8EAEBAQEBAQF2FIR1P4lsvQwBgzKGOoIGhCqCeQ2DVIEbBY45iGGNX48Bg0yLEDkrgh6BLV+FdoFJAQEB X-IPAS-Result: A2AABQA3xJ5W/xT574ReDgsBAQEBDwEBAQGNH7RfE4V8gUQ8EAEBAQEBAQF2FIR1P4lsvQwBgzKGOoIGhCqCeQ2DVIEbBY45iGGNX48Bg0yLEDkrgh6BLV+FdoFJAQEB X-IronPort-AV: E=Sophos;i="5.22,319,1449561600"; d="scan'208";a="100349833" X-Spam-Status: No X-Spam-Level: Received: from act-bufferout-a1.ucsd.edu ([132.239.249.20]) by iport-acv4-out.ucsd.edu with ESMTP; 19 Jan 2016 15:20:12 -0800 Received: from eklimczak-eth1.ucsd.edu (eklimczak-eth1.ucsd.edu [132.239.153.127]) (using TLSv1 with cipher AES128-SHA (128/128 bits)) (No client certificate requested) (Authenticated sender: eklimczak@ad.ucsd.edu) by act-bufferout-a1.ucsd.edu (Postfix) with ESMTPSA id 2050F405D7; Tue, 19 Jan 2016 15:20:12 -0800 (PST) From: Erik Klimczak Content-Type: text/plain; charset=us-ascii Subject: IDA2015:001 IDA2015:002 IDA2015:003 IDA2015:004 IDA2015:005 Date: Tue, 19 Jan 2016 15:20:11 -0800 Message-Id: <4347B31D-DEB8-47F8-B4D6-9AD52EB711F1@ucsd.edu> Cc: Gillian Sharer , Dan Auerbach , Erik Klimczak To: qc@iris.washington.edu Mime-Version: 1.0 (Mac OS X Mail 7.3 \(1878.6\)) X-Mailer: Apple Mail (2.1878.6) X-Virus-Scanned: by bsmtpd at iris.washington.edu Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by marvin2.iris.washington.edu id u0JNMHhp010538 DATA PROBLEM REPORT IDA2015:001 2015/02/13 IDA DCC Erik Klimczak IDA TAU II *** 2015,006 2015,024 Problem Description OTHER IDA station TAU was down from day 2015,006-14:51 to 2015,024-03:35 due to damage to the power supply for the microwave link between the vault and recording room at the University of Tasmania. Data acquisition was restored after IDA engineers visited the station and upgraded the power system, re-installed all sensors with thermal insulation, and moved the recording room equipment to a room directly adjacent to the vault. END DATA PROBLEM REPORT IDA2015:002 2015/02/13 IDA DCC Erik Klimczak IDA HOPE II *** 2015,008 2015,017 Problem Description OTHER IDA station HOPE was down from day 2015,008-16:55 to 2015,017-11:43 while an IDA engineer was onsite to upgrade the vault. Additional work included installing a Setra microbarograph, Episensor strong motion sensor, and power system upgrades. END DATA PROBLEM REPORT IDA2015:003 2015/03/13 IDA DCC Erik Klimczak IDA ALE II BH*-00,LH*-00,LN*-00 2015,040 2015,071 Problem Description OTHER There was a data gap for all channels from the STS-1 and Episensor sensors from day 2015,040-16:42 to 2015,071-23:21 due to a communication problem between the ale00 digitizer and station computer. Data acquisition was restored after restarting the data acquisition process for both Q330 digitizers. END DATA PROBLEM REPORT IDA2015:004 2015/05/13 IDA DCC Erik Klimczak IDA PALK II LN*-00,EN*-00 2014,185 - Problem Description DEAD CHANNEL Data from the strong motion sensor at PALK is non-seismic for reasons yet to be determined. END DATA PROBLEM REPORT IDA2015:005 2015/09/29 IDA DCC Erik Klimczak IDA AAK II LN*-00,EN*-00 2015,033 2015,262 Problem Description OTHER Data from the strong motion sensor at AAK was showing excessive noise due to a known defect in the instrument. Data quality improved on day 2015,262-05:47 after the station operator replaced the sensor. END From eklimczak@ucsd.edu Tue Jan 19 15:31:51 2016 Return-Path: Received: from norman.iris.washington.edu (norman.iris.washington.edu [192.168.166.28]) by marvin2.iris.washington.edu (8.14.4/8.14.4) with ESMTP id u0JNVpZL011035 for ; Tue, 19 Jan 2016 15:31:51 -0800 Received: from barracuda.iris.washington.edu (mailin01.iris.washington.edu [192.168.167.28]) by norman.iris.washington.edu (8.14.4/8.14.4) with ESMTP id u0JNVmcK015506 for ; Tue, 19 Jan 2016 15:31:50 -0800 Received: from iport-acv6-out.ucsd.edu (iport-acv6-out.ucsd.edu [132.239.0.13]) by barracuda.iris.washington.edu with ESMTP id dj56aws4D20MOk53; Tue, 19 Jan 2016 15:31:47 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=ucsd.edu; i=@ucsd.edu; q=dns/txt; s=041709-iport; t=1453246308; x=1484782308; h=from:content-transfer-encoding:subject:date:message-id: cc:to:mime-version; bh=EoyHcgZmZmqG/cc0dqZRabIc+73V8AnQsvu6wD57LA0=; b=O4wulzjXjPpHa41jq/AlCE3nC9UnXDo50rDAYHBIIN37+jGu8pglIeq8 daJ/H0J3ehFuO9y/s9tb7Hy6N+YyQz+9C47ll0R9gzkCZJIdH4NUhJ3Wo rxs1y9VKLmRr0Fqf+iEEVZpcz06NVptnX/yf89R6kIa/X/7zd0Qaz9udo E=; X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: A2AlBQCLxp5W/1EA74QoLggOCwEBAQEPAQEBAYMKihW0XxOFfIFDPBABAQEBAQEBdhSCHoJXP4lsvQ0BgwgBAQgBAQEBAQEBGYY6ggaEKoJcAxIIaIJ5gRsFh1+GWohhjV+PAYYFiFc5K4IegS1fhz8BAQE X-IPAS-Result: A2AlBQCLxp5W/1EA74QoLggOCwEBAQEPAQEBAYMKihW0XxOFfIFDPBABAQEBAQEBdhSCHoJXP4lsvQ0BgwgBAQgBAQEBAQEBGYY6ggaEKoJcAxIIaIJ5gRsFh1+GWohhjV+PAYYFiFc5K4IegS1fhz8BAQE X-IronPort-AV: E=Sophos;i="5.22,319,1449561600"; d="scan'208";a="101646165" X-Spam-Status: No X-Spam-Level: Received: from act-bufferout-b2.ucsd.edu ([132.239.0.81]) by iport-acv6-out.ucsd.edu with ESMTP; 19 Jan 2016 15:31:47 -0800 Received: from eklimczak-eth1.ucsd.edu (eklimczak-eth1.ucsd.edu [132.239.153.127]) (using TLSv1 with cipher AES128-SHA (128/128 bits)) (No client certificate requested) (Authenticated sender: eklimczak@ad.ucsd.edu) by act-bufferout-b2.ucsd.edu (Postfix) with ESMTPSA id B079BFBDA9; Tue, 19 Jan 2016 15:31:46 -0800 (PST) From: Erik Klimczak Content-Type: text/plain; charset=us-ascii Subject: IDA2015:006 IDA2015:007 IDA2015:008 IDA2015:009 IDA2015:010 Date: Tue, 19 Jan 2016 15:31:45 -0800 Message-Id: <01C2F567-A558-4BE9-BFFD-353D0E09AAE4@ucsd.edu> Cc: Gillian Sharer , Dan Auerbach , Erik Klimczak To: qc@iris.washington.edu Mime-Version: 1.0 (Mac OS X Mail 7.3 \(1878.6\)) X-Mailer: Apple Mail (2.1878.6) X-Virus-Scanned: by bsmtpd at iris.washington.edu Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by marvin2.iris.washington.edu id u0JNVpZL011035 DATA PROBLEM REPORT IDA2015:006 2015/05/13 IDA DCC Erik Klimczak IDA PALK II BH*-00,LH*-00,LN*-00,EN*-00 2015,125 - Problem Description OTHER The palk-00 digitizer is not acquiring data since day 2015,125-10:15. IDA engineers are working with the station operator to resolve this issue. END DATA PROBLEM REPORT IDA2015:007 2015/06/25 IDA DCC Erik Klimczak IDA JTS II *** 2015,150 2015,160 Problem Description OTHER IDA station JTS was down from day 2015,150-21:54 to 2015,160-21:38 due to GPS problems. The GPS clocks were unlocked and timing of the data uncertain. The GPS clocks locked again after the station operator visited the station and replaced the GPS antennas. END DATA PROBLEM REPORT IDA2015:008 2015/07/21 IDA DCC Erik Klimczak IDA RAYN II *** 2015,192 - Problem Description OTHER IDA station RAYN is down as of day 2015,192-19:36 due to communication problems between the digitizers and the station computer. A faulty LAN extender is suspected. END DATA PROBLEM REPORT IDA2015:009 2015/08/07 IDA DCC Erik Klimczak IDA TLY II *** 2015,198 - Problem Description OTHER IDA station TLY is down as of day 2015,198 due to power problems at the station. Backup power is not working at the station due to faulty UPS batteries, and no fuel for the generator. END DATA PROBLEM REPORT IDA2015:010 2015/08/17 IDA DCC Erik Klimczak IDA ALE II *** 2015,224 - Problem Description OTHER IDA station ALE was powered down on day 2015,224-18:33 due to demolition of the building surrounding the vault. The station will be reconnected this fall after a new building is completed. END From eklimczak@ucsd.edu Tue Jan 19 15:33:43 2016 Return-Path: Received: from norman.iris.washington.edu (norman.iris.washington.edu [192.168.166.28]) by marvin2.iris.washington.edu (8.14.4/8.14.4) with ESMTP id u0JNXhAw010134 for ; Tue, 19 Jan 2016 15:33:43 -0800 Received: from barracuda.iris.washington.edu (mailin01.iris.washington.edu [192.168.167.28]) by norman.iris.washington.edu (8.14.4/8.14.4) with ESMTP id u0JNXfQ0015524 for ; Tue, 19 Jan 2016 15:33:43 -0800 Received: from iport-acv4-out.ucsd.edu (iport-acv4-out.ucsd.edu [132.239.0.7]) by barracuda.iris.washington.edu with ESMTP id JwWzvMxd74titTrN; Tue, 19 Jan 2016 15:33:40 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=ucsd.edu; i=@ucsd.edu; q=dns/txt; s=041709-iport; t=1453246421; x=1484782421; h=from:content-transfer-encoding:subject:date:message-id: cc:to:mime-version; bh=vG0Sgz1trvTf81I4acrkB3gaBcn0a086Fy17acGiUUU=; b=T93vb+7DWTgWzKxSX+2XZjhfKcw0taMHVqFZp83CusFSMW4ynw06vFAG 07/PO/UGYVE2/ZGyTUAxYcdrsQOnV6hZJu52pk/XMohde9eI0LvQ1PvL6 e3hZHcq/QXFiCpzvHewnZf5RxiZY5vVUcLXTUaISId6iUtXhMhwCOECF0 c=; X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: A2AhBQCLxp5W/1EA74ReDgsBAQEBDwEBAQGDCooVtF8ThXyBQzsRAQEBAQEBAXYUhHU/iWy9DQGDCAEBCAEBAQEBAQEZhjqCBgiEIoJ5DVuCeYEbBY45iGGNX48Bg0yLEDgsgh6BLV+FdoFJAQEB X-IPAS-Result: A2AhBQCLxp5W/1EA74ReDgsBAQEBDwEBAQGDCooVtF8ThXyBQzsRAQEBAQEBAXYUhHU/iWy9DQGDCAEBCAEBAQEBAQEZhjqCBgiEIoJ5DVuCeYEbBY45iGGNX48Bg0yLEDgsgh6BLV+FdoFJAQEB X-IronPort-AV: E=Sophos;i="5.22,319,1449561600"; d="scan'208";a="100355569" X-Spam-Status: No X-Spam-Level: Received: from act-bufferout-b2.ucsd.edu ([132.239.0.81]) by iport-acv4-out.ucsd.edu with ESMTP; 19 Jan 2016 15:33:40 -0800 Received: from eklimczak-eth1.ucsd.edu (eklimczak-eth1.ucsd.edu [132.239.153.127]) (using TLSv1 with cipher AES128-SHA (128/128 bits)) (No client certificate requested) (Authenticated sender: eklimczak@ad.ucsd.edu) by act-bufferout-b2.ucsd.edu (Postfix) with ESMTPSA id 49B89FBD69; Tue, 19 Jan 2016 15:33:40 -0800 (PST) From: Erik Klimczak Content-Type: text/plain; charset=us-ascii Subject: IDA2015:011 IDA2015:012 IDA2015:013 IDA2015:014 Date: Tue, 19 Jan 2016 15:33:39 -0800 Message-Id: <1333314A-2E4A-4470-9EEE-D936A889809D@ucsd.edu> Cc: Gillian Sharer , Dan Auerbach , Erik Klimczak To: qc@iris.washington.edu Mime-Version: 1.0 (Mac OS X Mail 7.3 \(1878.6\)) X-Mailer: Apple Mail (2.1878.6) X-Virus-Scanned: by bsmtpd at iris.washington.edu Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by marvin2.iris.washington.edu id u0JNXhAw010134 DATA PROBLEM REPORT IDA2015:011 2015/09/09 IDA DCC Erik Klimczak IDA NNA II *** 2015,218 2015,236 Problem Description OTHER IDA station NNA was down from day 2015,218-12:07 to 2015,236-19:36 due to a power supply failure. Data acquisition was restored after an IDA engineer visited the station and upgraded the power system and replaced the station computers. END DATA PROBLEM REPORT IDA2015:012 2015/09/22 IDA DCC Erik Klimczak IDA SACV II BH*-00,LH*-00 2015,252 - Problem Description DEAD CHANNEL All channels from the KS54000 seismometer are non-seismic as of day 2015,252-11:40 due to a faulty cable to the sensor. END DATA PROBLEM REPORT IDA2015:013 2015/10/30 IDA DCC Erik Klimczak IDA DGAR II *** 2015,265 2015,297 Problem Description OTHER IDA station DGAR was down as from day 2015,265-02:33 to 2015,297-12:41 due to failure of the station computers. Data acquisition resumed after the station operator replaced the station computers. END DATA PROBLEM REPORT IDA2015:014 2015/10/30 IDA DCC Erik Klimczak IDA NNA II *** 2015,274 - Problem Description OTHER IDA station NNA is down as of day 2015,274-17:30 due to damage to the AC circuit breaker box caused by a power surge. An IDA engineer is working with the station operator to obtain a new AC circuit breaker box and surge protection. END From eklimczak@ucsd.edu Tue Jan 19 15:53:14 2016 Return-Path: Received: from norman.iris.washington.edu (norman.iris.washington.edu [192.168.166.28]) by marvin2.iris.washington.edu (8.14.4/8.14.4) with ESMTP id u0JNrEXr004907 for ; Tue, 19 Jan 2016 15:53:14 -0800 Received: from barracuda.iris.washington.edu (mailin01.iris.washington.edu [192.168.167.28]) by norman.iris.washington.edu (8.14.4/8.14.4) with ESMTP id u0JNrCmt015999 for ; Tue, 19 Jan 2016 15:53:14 -0800 Received: from iport-acv6-out.ucsd.edu (iport-acv6-out.ucsd.edu [132.239.0.13]) by barracuda.iris.washington.edu with ESMTP id wtDP73kKfrpaabvw; Tue, 19 Jan 2016 15:53:11 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=ucsd.edu; i=@ucsd.edu; q=dns/txt; s=041709-iport; t=1453247592; x=1484783592; h=from:content-transfer-encoding:subject:date:message-id: cc:to:mime-version; bh=pMmEg7kh/OeZ8+wVC0d+UHHKBY5thO6GjO9MHpZ6pmY=; b=TTBuhG1ZzVwRTZ9O8nsX0+lF7Fl7ADQIqFjMst1jpWH2oftwe6peX6Yf qK4wzFflmvrReFXL3dZaUVnYE5kZDOFG2EipHUimPYQ5oHX8L7o6MA4x+ sH5B+g1uQqcbt5mTi6FuX7Y9RzMpaAp/uW/W/Pwx5AxFAAHtkRraRulmc k=; X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: A2AlBQD/yp5W/x0A74ReDgsBAQEBDwEBAQGDCooVtGACEYV8gUM8EAEBAQEBAQF2FIR1P4lsvHoBgwgBAQgBAQEBAQEBGYY6ggYIhCKCeWiCeYEbBY45iGGNX48Bjlw5K4IegS1fhz8BAQE X-IPAS-Result: A2AlBQD/yp5W/x0A74ReDgsBAQEBDwEBAQGDCooVtGACEYV8gUM8EAEBAQEBAQF2FIR1P4lsvHoBgwgBAQgBAQEBAQEBGYY6ggYIhCKCeWiCeYEbBY45iGGNX48Bjlw5K4IegS1fhz8BAQE X-IronPort-AV: E=Sophos;i="5.22,319,1449561600"; d="scan'208";a="101653055" X-Spam-Status: No X-Spam-Level: Received: from act-bufferout-a2.ucsd.edu ([132.239.0.29]) by iport-acv6-out.ucsd.edu with ESMTP; 19 Jan 2016 15:53:11 -0800 Received: from eklimczak-eth1.ucsd.edu (eklimczak-eth1.ucsd.edu [132.239.153.127]) (using TLSv1 with cipher AES128-SHA (128/128 bits)) (No client certificate requested) (Authenticated sender: eklimczak@ad.ucsd.edu) by act-bufferout-a2.ucsd.edu (Postfix) with ESMTPSA id C799CFBDC1; Tue, 19 Jan 2016 15:53:10 -0800 (PST) From: Erik Klimczak Content-Type: text/plain; charset=us-ascii Subject: IDA2013:011 IDA2014:001 IDA2008:011 IDA2012:020 IDA2015:004 Date: Tue, 19 Jan 2016 15:53:10 -0800 Message-Id: Cc: Gillian Sharer , Dan Auerbach , Erik Klimczak To: qc@iris.washington.edu Mime-Version: 1.0 (Mac OS X Mail 7.3 \(1878.6\)) X-Mailer: Apple Mail (2.1878.6) X-Virus-Scanned: by bsmtpd at iris.washington.edu Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by marvin2.iris.washington.edu id u0JNrEXr004907 PROBLEM RESOLUTION REPORT IDA2013:011 2014/04/16 IDA Erik Klimczak Description of Problem Resolution RESOLUTION Data quality for the East-West channels from the CMG-3T sensor improved as of day 2014,038-01:41 after data acquisition was restored following a power outage. END PROBLEM RESOLUTION REPORT IDA2014:001 2014/04/16 IDA Erik Klimczak Description of Problem Resolution RESOLUTION The station operator replaced the faulty Q330 digitizer and gapping of the BH*-00 and LH*-00 channels ceased on day 2014,080-05:46. END PROBLEM RESOLUTION REPORT IDA2008:011 2014/08/13 IDA Erik Klimczak Description of Problem Resolution RESOLUTION The vertical channels from the KS-54000 seismometer were restored on day 2014,220-04:21 after IDA engineers visited the station and replaced the KS-54000 seismometer. END PROBLEM RESOLUTION REPORT IDA2012:020 2014/08/13 IDA Erik Klimczak Description of Problem Resolution RESOLUTION The data from the strong motion sensor was restored as of day 2014,220-04:21 after IDA engineers visited the station and replaced the episensor strong motion sensor. END PROBLEM RESOLUTION REPORT IDA2015:004 2015/09/09 IDA Erik Klimczak Description of Problem Resolution RESOLUTION Data from the strong motion sensor was restored on day 2015,242-04:57 after the station operator replaced the palk-00 digitizer. END From eklimczak@ucsd.edu Tue Jan 19 16:06:53 2016 Return-Path: Received: from norman.iris.washington.edu (norman.iris.washington.edu [192.168.166.28]) by marvin2.iris.washington.edu (8.14.4/8.14.4) with ESMTP id u0K06rJH006043 for ; Tue, 19 Jan 2016 16:06:53 -0800 Received: from barracuda.iris.washington.edu (mailin01.iris.washington.edu [192.168.167.28]) by norman.iris.washington.edu (8.14.4/8.14.4) with ESMTP id u0K06pea016294 for ; Tue, 19 Jan 2016 16:06:53 -0800 Received: from iport-acv6-out.ucsd.edu (iport-acv6-out.ucsd.edu [132.239.0.13]) by barracuda.iris.washington.edu with ESMTP id 0Ds3Qb6tA7I3KEy9; Tue, 19 Jan 2016 16:06:50 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=ucsd.edu; i=@ucsd.edu; q=dns/txt; s=041709-iport; t=1453248410; x=1484784410; h=from:content-transfer-encoding:subject:date:message-id: cc:to:mime-version; bh=xfqUsbrSEU9OFbscrum3I4e70ax/bOaTp9F0zjsej5A=; b=Sz+kdaRdzwVxcmtjSugFkJsyeHVJ0fGsN6hiqArsjD6tDQzqDtczmagi /SOPidoYY0i60GVO+i7OlG+RWad7bJZxba/9zXQm8JkOjEnE6kIxiar7t yKFAE4XIQi2tPWIVpdkvYwseTlKXlJu1XDVMSQ0bhTM2PpTJY49X1QUTV 4=; X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: A2AjBQC1zp5W/4j574ReDgsBAQEBDwEBAQGDCooVtGAThXyBQzwQAQEBAQEBAXYUhHU/iWy8fwGDCAEBCAEBAQEBAQEZhjqCBgiEIoJ5DVuCeYEbBY45iGGNX48Bjlw5K4IegS1fhXaBSQEBAQ X-IPAS-Result: A2AjBQC1zp5W/4j574ReDgsBAQEBDwEBAQGDCooVtGAThXyBQzwQAQEBAQEBAXYUhHU/iWy8fwGDCAEBCAEBAQEBAQEZhjqCBgiEIoJ5DVuCeYEbBY45iGGNX48Bjlw5K4IegS1fhXaBSQEBAQ X-IronPort-AV: E=Sophos;i="5.22,319,1449561600"; d="scan'208";a="101657593" X-Spam-Status: No X-Spam-Level: Received: from act-bufferout-b1.ucsd.edu ([132.239.249.136]) by iport-acv6-out.ucsd.edu with ESMTP; 19 Jan 2016 16:06:49 -0800 Received: from eklimczak-eth1.ucsd.edu (eklimczak-eth1.ucsd.edu [132.239.153.127]) (using TLSv1 with cipher AES128-SHA (128/128 bits)) (No client certificate requested) (Authenticated sender: eklimczak@ad.ucsd.edu) by act-bufferout-b1.ucsd.edu (Postfix) with ESMTPSA id 3686B1424F0; Tue, 19 Jan 2016 16:06:49 -0800 (PST) From: Erik Klimczak Content-Type: text/plain; charset=us-ascii Subject: IDA2015:006 IDA2015:010 IDA2015:014 IDA2015:008 IDA2011:033 Date: Tue, 19 Jan 2016 16:06:48 -0800 Message-Id: <1719C020-7170-425E-AD20-5CA31EA5EBE9@ucsd.edu> Cc: Gillian Sharer , Dan Auerbach , Erik Klimczak To: qc@iris.washington.edu Mime-Version: 1.0 (Mac OS X Mail 7.3 \(1878.6\)) X-Mailer: Apple Mail (2.1878.6) X-Virus-Scanned: by bsmtpd at iris.washington.edu Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by marvin2.iris.washington.edu id u0K06rJH006043 PROBLEM RESOLUTION REPORT IDA2015:006 2015/09/09 IDA Erik Klimczak Description of Problem Resolution RESOLUTION All channels from the KS54000 sensor and strong motion sensor were restored on day 2015,242-04:57 after the station operator replaced the palk-00 digitizer. END PROBLEM RESOLUTION REPORT IDA2015:010 2015/09/09 IDA Erik Klimczak Description of Problem Resolution RESOLUTION IDA station ALE was powered back up and data acquisition was restored following construction activities on day 2015,238-22:26. END PROBLEM RESOLUTION REPORT IDA2015:014 2015/11/10 IDA Erik Klimczak Description of Problem Resolution RESOLUTION IDA station NNA is back up as of day 2015,314-18:29 after the station operator replaced the surge arrestor and circuit breaker with equipment shipped from UCSD. END PROBLEM RESOLUTION REPORT IDA2015:008 2015/11/10 IDA Erik Klimczak Description of Problem Resolution RESOLUTION IDA station RAYN is back up as of day 2015,313-20:00 after an IDA engineer visited the station and restored the connection between the vault and the wellhead, and upgraded the power system. END PROBLEM RESOLUTION REPORT IDA2011:033 2015/11/10 IDA Erik Klimczak Description of Problem Resolution RESOLUTION The vertical channels BHZ-00 and LHZ-00 have been restored as of day 2015,313-20:00 after an IDA engineer visited the station and replaced the CMG-3T seismometer with an STS-5 seismometer. END From eklimczak@ucsd.edu Thu Jan 21 14:23:13 2016 Return-Path: Received: from norman.iris.washington.edu (norman.iris.washington.edu [192.168.166.28]) by marvin2.iris.washington.edu (8.14.4/8.14.4) with ESMTP id u0LMNDHs028222 for ; Thu, 21 Jan 2016 14:23:13 -0800 Received: from barracuda.iris.washington.edu (mailin01.iris.washington.edu [192.168.167.28]) by norman.iris.washington.edu (8.14.4/8.14.4) with ESMTP id u0LMNBED003851 for ; Thu, 21 Jan 2016 14:23:13 -0800 Received: from iport-acv2-out.ucsd.edu (iport-acv2-out.ucsd.edu [132.239.0.174]) by barracuda.iris.washington.edu with ESMTP id rpFpa6MuPKIlAJmj for ; Thu, 21 Jan 2016 14:23:10 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=ucsd.edu; i=@ucsd.edu; q=dns/txt; s=041709-iport; t=1453414991; x=1484950991; h=from:content-transfer-encoding:subject:date:message-id: cc:to:mime-version; bh=zQq05wU7olkUVkfL1nd6Jj0zhU8FpG7lsYTMu9g1Q20=; b=eehSIsCmA8Gy6oZQPW2MFdE+YoWDaBS42FS6qWMyxxb1sm9G/gjtB1eX b1I1w47XzqlaURilOjKyXagtF5eBYphw1NdbDU7S5tvz5qj/8FoLH+osE BKjOXebbSc9w1J0S5JUYT2XpkEhZ1M71dETn3gPgdoRVS6Q+aFrSdL5LY 0=; X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: A2AgBQChWaFW/1EA74ReDgsBAQEBDwEBAQGDCooWtBgThXyBQzsRAQEBAQEBAXYUhHU/iWy7RgGDIgEBCAEBAQEBAQEZhjWCBQiEHoNegmCBDwWOHYhYjVUGjnOOPDYsgguBH12HbAEBAQ X-IPAS-Result: A2AgBQChWaFW/1EA74ReDgsBAQEBDwEBAQGDCooWtBgThXyBQzsRAQEBAQEBAXYUhHU/iWy7RgGDIgEBCAEBAQEBAQEZhjWCBQiEHoNegmCBDwWOHYhYjVUGjnOOPDYsgguBH12HbAEBAQ X-IronPort-AV: E=Sophos;i="5.22,327,1449561600"; d="scan'208";a="357841043" X-Spam-Status: No X-Spam-Level: Received: from act-bufferout-b2.ucsd.edu ([132.239.0.81]) by iport-acv2-out.ucsd.edu with ESMTP; 21 Jan 2016 14:23:10 -0800 Received: from eklimczak-eth1.ucsd.edu (eklimczak-eth1.ucsd.edu [132.239.153.127]) (using TLSv1 with cipher AES128-SHA (128/128 bits)) (No client certificate requested) (Authenticated sender: eklimczak@ad.ucsd.edu) by act-bufferout-b2.ucsd.edu (Postfix) with ESMTPSA id 35EC6FBFAC; Thu, 21 Jan 2016 14:23:10 -0800 (PST) From: Erik Klimczak Content-Type: text/plain; charset=us-ascii Subject: IDA2015:015 IDA2015:016 Date: Thu, 21 Jan 2016 14:23:09 -0800 Message-Id: Cc: Peter Davis , Erik Klimczak To: qc@iris.washington.edu Mime-Version: 1.0 (Mac OS X Mail 7.3 \(1878.6\)) X-Mailer: Apple Mail (2.1878.6) X-Virus-Scanned: by bsmtpd at iris.washington.edu Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by marvin2.iris.washington.edu id u0LMNDHs028222 DATA PROBLEM REPORT IDA2015:015 2015/12/18 IDA DCC Erik Klimczak IDA PALK II LN*-00,EN*-00 2015,242 - Problem Description DEAD CHANNEL Data from the strong motion sensor at PALK is non-seismic due to a faulty sensor. END DATA PROBLEM REPORT IDA2015:016 2016/01/21 IDA DCC Erik Klimczak IDA FFC II *** 2015,348 - Problem Description OTHER IDA station FFC is down as of day 2015,348-21:09 due to communication problems between the digitizers and the station computers. New LAN Extenders, an ethernet switch and surge protectors have been shipped to the station. END From eklimczak@ucsd.edu Thu Mar 31 14:46:08 2016 Return-Path: Received: from norman.iris.washington.edu (norman.iris.washington.edu [192.168.166.28]) by marvin2.iris.washington.edu (8.14.4/8.14.4) with ESMTP id u2VLk8CH027052 for ; Thu, 31 Mar 2016 14:46:08 -0700 Received: from barracuda.iris.washington.edu (mailin01.iris.washington.edu [192.168.167.28]) by norman.iris.washington.edu (8.14.4/8.14.4) with ESMTP id u2VLk68r022060 for ; Thu, 31 Mar 2016 14:46:08 -0700 Received: from iport-acv5-out.ucsd.edu (iport-acv5-out.ucsd.edu [132.239.0.10]) by barracuda.iris.washington.edu with ESMTP id LXDTwfHwMgOJhHpB for ; Thu, 31 Mar 2016 14:46:05 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=ucsd.edu; i=@ucsd.edu; q=dns/txt; s=041709-iport; t=1459460766; x=1490996766; h=from:content-transfer-encoding:subject:date:message-id: cc:to:mime-version; bh=ogzuZULWLi+k7SQkDDMjyVF1aJ+pF3QBkK9I2YxOTog=; b=i3beDR1VDAFIce8QkCYpM9nmWVIw2jilROvMiqQQzSlwztr+QMEJlfFg r/IHWbLiB1oL0l3YqggsyRsdIJwzAAsmOJ3b92CvG5MhMxHl6AC6R8Rp8 wy4FXIGBg+oMiWFWJSQjolcPW1W/9mK5BVyEeqoaLbvBVBxiVOcg5YrfF Y=; X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: A2B2BgComf1W/1EA74RdDgsBAQEBgxYivE+BchKFe4FJOhIBAQEBAQEBZRMUhQI/iXi/GwGEKQEBCAEBAQEBAQEZhh6BdQiEAINTgXwLQBiCKwWOO4k3jgiPDY8VJwQ3ghGBG1uJOQEBAQ X-IPAS-Result: A2B2BgComf1W/1EA74RdDgsBAQEBgxYivE+BchKFe4FJOhIBAQEBAQEBZRMUhQI/iXi/GwGEKQEBCAEBAQEBAQEZhh6BdQiEAINTgXwLQBiCKwWOO4k3jgiPDY8VJwQ3ghGBG1uJOQEBAQ X-IronPort-AV: E=Sophos;i="5.24,424,1455004800"; d="scan'208";a="122400955" X-Spam-Status: No X-Spam-Level: Received: from act-bufferout-b2.ucsd.edu ([132.239.0.81]) by iport-acv5-out.ucsd.edu with ESMTP/TLS/DHE-RSA-AES256-SHA; 31 Mar 2016 14:46:05 -0700 Received: from eklimczak-eth1.ucsd.edu (eklimczak-eth1.ucsd.edu [132.239.153.127]) (using TLSv1 with cipher AES128-SHA (128/128 bits)) (No client certificate requested) (Authenticated sender: eklimczak@ad.ucsd.edu) by act-bufferout-b2.ucsd.edu (Postfix) with ESMTPSA id 5B388832; Thu, 31 Mar 2016 14:46:04 -0700 (PDT) From: Erik Klimczak Content-Type: text/plain; charset=us-ascii Subject: IDA2016:001 IDA2016:002 IDA2016:003 IDA2015:016 Date: Thu, 31 Mar 2016 14:46:03 -0700 Message-Id: <8A1C9F58-DA20-45B8-9409-9A4B0B1DD225@ucsd.edu> Cc: Peter Davis , Erik Klimczak To: qc@iris.washington.edu Mime-Version: 1.0 (Mac OS X Mail 7.3 \(1878.6\)) X-Mailer: Apple Mail (2.1878.6) X-Virus-Scanned: by bsmtpd at iris.washington.edu Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by marvin2.iris.washington.edu id u2VLk8CH027052 DATA PROBLEM REPORT IDA2016:001 2016/03/22 IDA DCC Erik Klimczak IDA NIL II *** 2016,054 - Problem Description OTHER The GPS clocks at IDA station NIL are unlocked and timing of data are uncertain since day 2016,054-08:16. END DATA PROBLEM REPORT IDA2016:002 2016/03/22 IDA DCC Erik Klimczak IDA MSEY II LN*-00,EN*-00 2016,064 - Problem Description DEAD CHANNEL The FBA-23 accelerometer at IDA station MSEY was removed on day 2016,064-05:50. An episensor strong motion sensor is being shipped to the station to replace the FBA-23 accelerometer. END DATA PROBLEM REPORT IDA2016:003 2016/03/29 IDA DCC Erik Klimczak IDA OBN II BH1-00,LH1-00 2013,271 2016,075 Problem Description OTHER The North-South channels from the STS-1 seismometer were very noisy, showing regular negative pulsing from day 2013,271-21:40 to 2016,075-13:05. Data quality improved after the station operator replaced the vacuum valve for the STS-1N seismometer. END PROBLEM RESOLUTION REPORT IDA2015:016 2016/03/22 IDA Erik Klimczak Description of Problem Resolution RESOLUTION IDA station FFC is back online as of day 2016,025-15:56 after the station operator replaced the ethernet switch and LAN extenders shipped from UCSD. END From eklimczak@ucsd.edu Wed Jul 27 14:45:04 2016 Return-Path: Received: from norman.iris.washington.edu (norman.iris.washington.edu [192.168.166.28]) by marvin2.iris.washington.edu (8.14.4/8.14.4) with ESMTP id u6RLj4jU014787 for ; Wed, 27 Jul 2016 14:45:04 -0700 Received: from barracuda.iris.washington.edu (mailin01.iris.washington.edu [192.168.167.28]) by norman.iris.washington.edu (8.14.4/8.14.4) with ESMTP id u6RLj2b7022781 for ; Wed, 27 Jul 2016 14:45:04 -0700 Received: from iport-acv2-out.ucsd.edu (iport-acv2-out.ucsd.edu [132.239.0.174]) by barracuda.iris.washington.edu with ESMTP id 6gXB3IAcSRkE3vCy for ; Wed, 27 Jul 2016 14:44:57 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=ucsd.edu; i=@ucsd.edu; q=dns/txt; s=041709-iport; t=1469655897; x=1501191897; h=from:content-transfer-encoding:subject:date:message-id: cc:to:mime-version; bh=rWUZfLVoHfiAZ0R094gOl/1qnyjau7L9OJ3+fRhdqdM=; b=MtLBsUkUsl4p8+1Z1X4yH3FhI3u0NTIM0R0j6mKeP+8xQIeQZnGDUbfq 2bSkfMK03v4hEhl1InMA9yd92kyHuVSYgV3CxZWmNVfjiiQFxKPKqzqh1 nx5KE9Cjp0Vf5qvuPTbJyekNo9tcKXxNa9Z4gbEH0wPsbqwhPFc7e02qo E=; X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: A2C+AQCxKplX/4j574QnLggODAEBAQGDIY59l0qTf4F9AQIRhgmBOTgUAQEBAQEBAV0TFIIjgno/igK4RAEGg0MLAQEBAQEhhiqBeAiEBoJlCGaFDwWPCoonjnyPQIwtg3geNoIdgSBbiQ4BAQE X-IPAS-Result: A2C+AQCxKplX/4j574QnLggODAEBAQGDIY59l0qTf4F9AQIRhgmBOTgUAQEBAQEBAV0TFIIjgno/igK4RAEGg0MLAQEBAQEhhiqBeAiEBoJlCGaFDwWPCoonjnyPQIwtg3geNoIdgSBbiQ4BAQE X-IronPort-AV: E=Sophos;i="5.28,431,1464678000"; d="scan'208";a="403068936" X-Spam-Status: No X-Spam-Level: Received: from act-bufferout-b1.ucsd.edu ([132.239.249.136]) by iport-acv2-out.ucsd.edu with ESMTP/TLS/DHE-RSA-AES256-SHA; 27 Jul 2016 14:44:56 -0700 Received: from eklimczak-eth1.ucsd.edu (eklimczak-eth1.ucsd.edu [132.239.153.127]) (using TLSv1 with cipher AES128-SHA (128/128 bits)) (No client certificate requested) (Authenticated sender: eklimczak@ad.ucsd.edu) by act-bufferout-b1.ucsd.edu (Postfix) with ESMTPSA id C25FF10A48A; Wed, 27 Jul 2016 14:44:56 -0700 (PDT) From: Erik Klimczak Content-Type: text/plain; charset=us-ascii Subject: IDA2016:004 IDA2016:005 IDA2016:006 IDA2016:007 IDA2016:001 Date: Wed, 27 Jul 2016 14:44:56 -0700 Message-Id: <2BF43028-5445-4DB4-918C-051388085984@ucsd.edu> Cc: Peter Davis , Erik Klimczak To: qc@iris.washington.edu Mime-Version: 1.0 (Mac OS X Mail 7.3 \(1878.6\)) X-Mailer: Apple Mail (2.1878.6) X-Virus-Scanned: by bsmtpd at iris.washington.edu Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by marvin2.iris.washington.edu id u6RLj4jU014787 DATA PROBLEM REPORT IDA2016:004 2016/07/19 IDA DCC Erik Klimczak IDA FFC II *** 2016,114 2016,180 Problem Description OTHER IDA station FFC was down from day 2016,114-15:43 to 2016,180-13:17 due to communication problems between the digitizers and the station computers. Data acquisition resumed after an IDA engineer visited the station and replaced the firewall, and secured loose connections in the vault and recording room. END DATA PROBLEM REPORT IDA2016:005 2016/07/19 IDA DCC Erik Klimczak IDA MSVF II *** 2016,132 2016,141 Problem Description OTHER IDA station MSVF was down from day 2016,132-17:59 to 2016,141-05:35 due to a power outage at the station. There have been several intermittent power outages since the passage of a cyclone in late February. END DATA PROBLEM REPORT IDA2016:006 2016/07/19 IDA DCC Erik Klimczak IDA ALE II *** 2016,173 2016,193 Problem Description OTHER IDA station ALE was powered down from day 2016,173-17:12 to 2016,193-18:27 due to building maintenance activities at the station. END DATA PROBLEM REPORT IDA2016:007 2016/07/19 IDA DCC Erik Klimczak IDA LVZ II *** 2016,194 - Problem Description OTHER The GPS clock at IDA station LVZ is unlocked and timing of data are uncertain since day 2016,194. END DATA PROBLEM REPORT IDA2016:001 2016/03/22 IDA DCC Erik Klimczak IDA NIL II *** 2016,054 - Problem Description OTHER The GPS clocks at IDA station NIL are unlocked and timing of data are uncertain since day 2016,054-08:16. END PROBLEM RESOLUTION REPORT IDA2016:001 2016/07/19 IDA Erik Klimczak Description of Problem Resolution RESOLUTION Timing quality improved after the GPS clock locked on day 2016,196-06:22. END From eklimczak@ucsd.edu Fri Sep 23 14:26:10 2016 Return-Path: Received: from norman.iris.washington.edu (norman.iris.washington.edu [192.168.166.28]) by marvin2.iris.washington.edu (8.14.4/8.14.4) with ESMTP id u8NLQAU2005227 for ; Fri, 23 Sep 2016 14:26:10 -0700 Received: from barracuda.iris.washington.edu (mailin01.iris.washington.edu [192.168.167.28]) by norman.iris.washington.edu (8.14.4/8.14.4) with ESMTP id u8NLQ8v1015471 for ; Fri, 23 Sep 2016 14:26:10 -0700 Received: from iport-acv4-out.ucsd.edu (iport-acv4-out.ucsd.edu [132.239.0.7]) by barracuda.iris.washington.edu with ESMTP id Nh3pEuvCLyxNlGsE for ; Fri, 23 Sep 2016 14:26:07 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=ucsd.edu; i=@ucsd.edu; q=dns/txt; s=041709-iport; t=1474665968; x=1506201968; h=from:content-transfer-encoding:subject:date:message-id: cc:to:mime-version; bh=m/utWuiiit1yF6Yrrbd8qWTFXVWc8qIj44pFdt8q534=; b=jtCbGg17SvJMY0jPcdjDIyzk0tSTXeAAv7dGjBVQ2UvECl12cBe/ZVp3 h09NHWIQUxc/AXZ7Yjo19u4NJzikcuavutNW5Me4hou9E7jNBBvdYtW9h NOpvkaeT8X/G7+FdXbOSBdg+L8djXb4BrbSwNLTlMo7yTu4TeQdP0/xo/ Q=; X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: A2BwAgB5neVX/1EA74QnLggODgEBBAEBCgEBgzsBAQEBAR6PBqtIggQBE4YKgWY4FAECAQEBAQEBAV4TFIIjgn8/ihy6OQEGgngBAQgBAQEBAQEBIIY3gXwIhAyCZghmggALWIIvBY8rikuPaI9rhF6IDYN8HjaDJid9W4glAQEB X-IPAS-Result: A2BwAgB5neVX/1EA74QnLggODgEBBAEBCgEBgzsBAQEBAR6PBqtIggQBE4YKgWY4FAECAQEBAQEBAV4TFIIjgn8/ihy6OQEGgngBAQgBAQEBAQEBIIY3gXwIhAyCZghmggALWIIvBY8rikuPaI9rhF6IDYN8HjaDJid9W4glAQEB X-IronPort-AV: E=Sophos;i="5.30,383,1470726000"; d="scan'208";a="166457527" X-Spam-Status: No X-Spam-Level: Received: from act-bufferout-b2.ucsd.edu ([132.239.0.81]) by iport-acv4-out.ucsd.edu with ESMTP/TLS/DHE-RSA-AES256-SHA; 23 Sep 2016 14:26:07 -0700 Received: from eklimczak-eth1.ucsd.edu (eklimczak-eth1.ucsd.edu [132.239.153.127]) (using TLSv1 with cipher AES128-SHA (128/128 bits)) (No client certificate requested) (Authenticated sender: eklimczak@ad.ucsd.edu) by act-bufferout-b2.ucsd.edu (Postfix) with ESMTPSA id E583D102B9B; Fri, 23 Sep 2016 14:26:06 -0700 (PDT) From: Erik Klimczak Content-Type: text/plain; charset=us-ascii Subject: IDA2016:008 IDA2016:009 IDA2016:010 IDA2016:011 IDA2016:012 IDA2016:002 IDA2016:007 Date: Fri, 23 Sep 2016 14:26:06 -0700 Message-Id: Cc: Peter Davis , Erik Klimczak To: qc@iris.washington.edu Mime-Version: 1.0 (Mac OS X Mail 7.3 \(1878.6\)) X-Mailer: Apple Mail (2.1878.6) X-Virus-Scanned: by bsmtpd at iris.washington.edu Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by marvin2.iris.washington.edu id u8NLQAU2005227 DATA PROBLEM REPORT IDA2016:008 2016/09/16 IDA DCC Erik Klimczak IDA FFC II *** 2016,214 2016,239 Problem Description OTHER IDA station FFC was down from day 2016,214-04:04 to 2016,239-22:43 due to communication problems between the digitizers and the station computers. Data acquisition was restored after the station operator replaced the ethernet switches, and surge protectors. END DATA PROBLEM REPORT IDA2016:009 2016/09/16 IDA DCC Erik Klimczak IDA CMLA II BHZ-10,LHZ-10 2016,238 - Problem Description DEAD CHANNEL Data quality for the vertical channels from the CMG-3T is poor since day 2016,238. A faulty sensor is suspected. END DATA PROBLEM REPORT IDA2016:010 2016/09/16 IDA DCC Erik Klimczak IDA NIL II *** 2016,254 2016,258 Problem Description OTHER IDA station NIL was down from day 2016,254-17:07 to 2016,258-22:37 due to power problems at the station. Data acquisition was restored after the station operator replaced the Newmar power supply. END DATA PROBLEM REPORT IDA2016:011 2016/09/16 IDA DCC Erik Klimczak IDA DGAR II *** 2016,234 - Problem Description OTHER The station is experiencing frequent losses of power causing gaps in the data. A trip to the station by an IDA engineer is planned. END DATA PROBLEM REPORT IDA2016:012 2016/09/16 IDA DCC Erik Klimczak IDA BORG II LN*-00,EN*-00 2016,256 - Problem Description DEAD CHANNEL The station operator replaced the FBA-23 accelerometer with an Episensor strong motion sensor. However, the Episensor is defective and will need to be replaced. END PROBLEM RESOLUTION REPORT IDA2016:007 2016/08/24 IDA Erik Klimczak Description of Problem Resolution RESOLUTION Timing quality improved after the GPS clock locked on day 2016,224-06:55. END PROBLEM RESOLUTION REPORT IDA2016:002 2016/09/16 IDA Erik Klimczak Description of Problem Resolution RESOLUTION The station operator replaced the FBA-23 accelerometer with an Episensor strong motion sensor on day 2016,133-07:30. END From eklimczak@ucsd.edu Wed Nov 2 15:21:25 2016 Return-Path: Received: from norman.iris.washington.edu (norman.iris.washington.edu [192.168.166.28]) by marvin2.iris.washington.edu (8.14.4/8.14.4) with ESMTP id uA2MLP8c010405 for ; Wed, 2 Nov 2016 15:21:25 -0700 Received: from barracuda.iris.washington.edu (mailin01.iris.washington.edu [192.168.167.28]) by norman.iris.washington.edu (8.14.4/8.14.4) with ESMTP id uA2MLNsl022296 for ; Wed, 2 Nov 2016 15:21:25 -0700 Received: from iport-acv6-out.ucsd.edu (iport-acv6-out.ucsd.edu [132.239.0.13]) by barracuda.iris.washington.edu with ESMTP id tPLX2kmwoY3cRd0p for ; Wed, 02 Nov 2016 15:21:22 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=ucsd.edu; i=@ucsd.edu; q=dns/txt; s=041709-iport; t=1478125283; x=1509661283; h=from:content-transfer-encoding:subject:date:message-id: cc:to:mime-version; bh=Z5dx1KvXWC3A201IJ0PauBGDlJRblyKpdYYBvUgWaTE=; b=SsnBmhZtTxB/y/l5nrZPtac8SYDI94l0/tqv3VUB4erwUI5YmVZeSdXr RKZUnffQzTjrqlqwirDZkMLVpa/8QpIlhNkxjKS8FVqi9qu5V4SDX29pL 9Pyj9Kkzq7glH4+OVuaq0Y60VYj7Ry0SdYq60vZ54EOO4WJtaHqs2KHu0 Y=; X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: A2DbBAD4ZRpY/1EA74RdDg4BAQQBAQoBAYMsAQEBAQEfvFkBF4YKgitDEAECAQEBAQEBAWIUFIUiP4ontn0BBoMoAQEIAQEBAQEBASCGPYF9CIQMgnFmgmWCLwWPSYpUkDqBWAGOMI0FE4QENR+EHIEnW4kuAQEB X-IPAS-Result: A2DbBAD4ZRpY/1EA74RdDg4BAQQBAQoBAYMsAQEBAQEfvFkBF4YKgitDEAECAQEBAQEBAWIUFIUiP4ontn0BBoMoAQEIAQEBAQEBASCGPYF9CIQMgnFmgmWCLwWPSYpUkDqBWAGOMI0FE4QENR+EHIEnW4kuAQEB X-IronPort-AV: E=Sophos;i="5.31,436,1473145200"; d="scan'208";a="185038496" X-Spam-Status: No X-Spam-Level: Received: from act-bufferout-b2.ucsd.edu ([132.239.0.81]) by iport-acv6-out.ucsd.edu with ESMTP/TLS/DHE-RSA-AES256-SHA; 02 Nov 2016 15:21:23 -0700 Received: from eklimczak-eth1.ucsd.edu (eklimczak-eth1.ucsd.edu [132.239.153.127]) (using TLSv1 with cipher AES128-SHA (128/128 bits)) (No client certificate requested) (Authenticated sender: eklimczak@ad.ucsd.edu) by act-bufferout-b2.ucsd.edu (Postfix) with ESMTPSA id 155CA10573E; Wed, 2 Nov 2016 15:21:22 -0700 (PDT) From: Erik Klimczak Content-Type: text/plain; charset=us-ascii Subject: IDA2015:004 IDA2016:011 Date: Wed, 2 Nov 2016 15:21:21 -0700 Message-Id: <4D102F8D-7207-48CA-8F91-3CE433208903@ucsd.edu> Cc: Peter Davis , Erik Klimczak To: qc@iris.washington.edu Mime-Version: 1.0 (Mac OS X Mail 7.3 \(1878.6\)) X-Mailer: Apple Mail (2.1878.6) X-Virus-Scanned: by bsmtpd at iris.washington.edu Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by marvin2.iris.washington.edu id uA2MLP8c010405 PROBLEM RESOLUTION REPORT IDA2015:004 2016/10/21 IDA Erik Klimczak Description of Problem Resolution RESOLUTION Data from the strong motion sensor was restored on day 2016,292, after an IDA engineer visited the station and replaced the faulty Episensor. END PROBLEM RESOLUTION REPORT IDA2016:011 2016/11/01 IDA Erik Klimczak Description of Problem Resolution RESOLUTION The power at IDA station DGAR has stabilized as of day 2016,283 for reasons not determined. END From eklimczak@ucsd.edu Wed Dec 21 14:51:06 2016 Return-Path: Received: from norman.iris.washington.edu (norman.iris.washington.edu [192.168.166.28]) by marvin2.iris.washington.edu (8.14.4/8.14.4) with ESMTP id uBLMp6gH029665 for ; Wed, 21 Dec 2016 14:51:06 -0800 Received: from barracuda.iris.washington.edu (mailin01.iris.washington.edu [192.168.167.28]) by norman.iris.washington.edu (8.14.4/8.14.4) with ESMTP id uBLMp4Gc013111 for ; Wed, 21 Dec 2016 14:51:06 -0800 Received: from iport-bcv2-out.ucsd.edu (iport-bcv2-out.ucsd.edu [132.239.0.73]) by barracuda.iris.washington.edu with ESMTP id nJgypuJfxEVZEtXR for ; Wed, 21 Dec 2016 14:51:03 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=ucsd.edu; i=@ucsd.edu; q=dns/txt; s=041709-iport; t=1482360664; x=1513896664; h=from:content-transfer-encoding:subject:date:message-id: cc:to:mime-version; bh=3bwmhb+ajIanJXmwfp9TaZVzrIdcdGvYnj18e+yNbtE=; b=KI2vo2CJfbIypX/nTRnRWet3mxHXYrGhLcrxU02mmZbzdnDP0/9fAW2x Aclo7tAu5lUO9JwAft5EuJmhhjVzc4e3PC30oQ8jw6t1Vii5L7cdUsn0E xuW4M/7ZzJOra7xNcppKmv5Qd7MdzHZni+1Oa6tRWHzpe8Ail2JsR6x2T U=; X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: A2BrAQAhB1tY/4j574RdDgwBAQEBAgEBAQEIAQEBAYM1AQEBAQEfjzWrY4IKAQYThgiBYT8UAQIBAQEBAQEBYhQUhSk/ij2rJogFAQaCcgEBCAEBAQEBAQEhhjaBfQiEEYJpZoJlgjAFkAGKdpE5kFGOEBSEDx83gWYBgUWCHoExXIkrAQEB X-IPAS-Result: A2BrAQAhB1tY/4j574RdDgwBAQEBAgEBAQEIAQEBAYM1AQEBAQEfjzWrY4IKAQYThgiBYT8UAQIBAQEBAQEBYhQUhSk/ij2rJogFAQaCcgEBCAEBAQEBAQEhhjaBfQiEEYJpZoJlgjAFkAGKdpE5kFGOEBSEDx83gWYBgUWCHoExXIkrAQEB X-IronPort-AV: E=Sophos;i="5.33,385,1477983600"; d="scan'208";a="40857576" X-Spam-Status: No X-Spam-Level: Received: from act-bufferout-b1.ucsd.edu ([132.239.249.136]) by iport-bcv2-out.ucsd.edu with ESMTP/TLS/DHE-RSA-AES256-SHA; 21 Dec 2016 14:51:03 -0800 Received: from eklimczak-eth1.ucsd.edu (eklimczak-eth1.ucsd.edu [132.239.153.127]) (using TLSv1 with cipher AES128-SHA (128/128 bits)) (No client certificate requested) (Authenticated sender: eklimczak@ad.ucsd.edu) by act-bufferout-b1.ucsd.edu (Postfix) with ESMTPSA id 46A8F2824A; Wed, 21 Dec 2016 14:51:03 -0800 (PST) From: Erik Klimczak Content-Type: text/plain; charset=us-ascii Subject: IDA2016:013 IDA2016:014 Date: Wed, 21 Dec 2016 14:51:02 -0800 Message-Id: <39543DF0-7484-4C5E-A343-570DF2811C0B@ucsd.edu> Cc: Peter Davis , Erik Klimczak To: qc@iris.washington.edu Mime-Version: 1.0 (Mac OS X Mail 7.3 \(1878.6\)) X-Mailer: Apple Mail (2.1878.6) X-Virus-Scanned: by bsmtpd at iris.washington.edu Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by marvin2.iris.washington.edu id uBLMp6gH029665 DATA PROBLEM REPORT IDA2016:013 2016/12/16 IDA DCC Erik Klimczak IDA KDAK II *** 2016,320 2016,341 Problem Description OTHER IDA station KDAK was down from day 2016,320-23:42 to 2016,341-22:02 due to a power outage caused by problems with the TEG. Station power was restored after the FPC board for the TEG was replaced. END __________________________________________________________________________________________ DATA PROBLEM REPORT IDA2016:014 2016/12/21 IDA DCC Erik Klimczak IDA KDAK II BH1-00,LH1-00,VH1-00,BH2-00,LH2-00,VH2-00 2016,341 - Problem Description DEAD CHANNEL The horizontal channels from the KS54000 seismometer are non-seismic since day 2016,341-22:02 for reasons yet to be determined. 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END _________________________________________________________________________________ DATA PROBLEM REPORT IDA2017:001 2017/02/09 IDA DCC Erik Klimczak IDA HOPE II *** 2017,010 - Problem Description OTHER Telemetry at IDA station HOPE is down as of day 2017,010-11:29 due to damaged VSAT equipment. New modems are being prepared to ship to the station. END From eklimczak@ucsd.edu Fri Apr 14 10:40:27 2017 Return-Path: Received: from norman.iris.washington.edu (norman.iris.washington.edu [192.168.166.28]) by marvin2.iris.washington.edu (8.14.4/8.14.4) with ESMTP id v3EHeRAn032147 for ; Fri, 14 Apr 2017 10:40:27 -0700 Received: from barracuda.iris.washington.edu (mailin01.iris.washington.edu [192.168.167.28]) by norman.iris.washington.edu (8.14.4/8.14.4) with ESMTP id v3EHePmv004727 for ; Fri, 14 Apr 2017 10:40:27 -0700 Received: from iport-bcv3-out.ucsd.edu (iport-bcv3-out.ucsd.edu [132.239.0.89]) by barracuda.iris.washington.edu with ESMTP id kSyagV9LownhAyY7 for ; Fri, 14 Apr 2017 10:39:54 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=ucsd.edu; i=@ucsd.edu; q=dns/txt; s=041709-iport; t=1492191624; x=1523727624; h=from:content-transfer-encoding:mime-version:subject: message-id:date:cc:to; bh=a89QrI1Pj6m7ejkvKJPUQ+7HMfXtsp+P1z0O0JVk8ns=; b=QLbdE1hT6JzOTsqjWnZShMIm5KU7u6QAiJ/y05B6tv/iVN1Dygll1flh 9pOW5e25WK5nNKWQzOHjmlDftGaky6M3Uc1Ivv8qUc2xP/zR2AFFlJofh FXxVYnrX4Q6DDNrkFddMsRcrbEOOgrRL1sFLHHqz86Y2TtJz9Cgngko82 s=; IronPort-PHdr: =?us-ascii?q?9a23=3AESVlTRUiB1xi3NWVDrpo1sUItN3V8LGtZVwlr6E/?= =?us-ascii?q?grcLSJyIuqrYbBeBt8tkgFKBZ4jH8fUM07OQ6PG+HzZYqs/Y7jgrS99lb1c9k8?= =?us-ascii?q?IYnggtUoauKHbQC7rUVRE8B9lIT1R//nu2YgB/Ecf6YEDO8DXptWZBUhrwOhBo?= =?us-ascii?q?KevrB4Xck9q41/yo+53Ufg5EmCexbal8IRiyrAjdrNcajZdtJqos1xfEo2ZDdv?= =?us-ascii?q?hLy29vOV+dhQv36N2q/J5k/SRQuvYh+NBFXK7nYak2TqFWASo/PWwt68LlqRfM?= =?us-ascii?q?TQ2U5nsBSWoWiQZHAxLE7B7hQJj8tDbxu/dn1ymbOc32Sq00WSin4qx2RhLklD?= =?us-ascii?q?sLOjgk+2zMlMd+kLxUrw6gpxxnwo7bfoeVNOZlfqjAed8WXHdNUtpNWyBEBI63?= =?us-ascii?q?cokBAPcbPetAr4fyu1QAohSjCwevCu3h1DhGi2Tq3a0j1uQtDQHG0BA+E98IrX?= =?us-ascii?q?/arM/1NKAXUe2tw6fI1zTDb/BL0jn47IjIcxUhru2NXL1qcsra1E4iGB3GjlWU?= =?us-ascii?q?qIzlOi+a1+UXvGiY9OdgSP6gi3U6pA1rvDeg29osh5DPi4kIyV7E7T10zJs7KN?= =?us-ascii?q?GmUkJ3f9CpHZ9Kuy2EOIZ7RtkuT390tCoi17ELt4C3cDIUxJkpwxPTceGLfoiG?= =?us-ascii?q?7x75SeqdPzV1iXR4c7ylnRmy61KvyujkW8mx11ZFszRKn8HXtnAIyxzT8s+HSu?= =?us-ascii?q?Zh/ku52TaAyQTT6uZcLE8uiaXbN4ctzaUtlpodv0TMADX2mELrjK+Kb0kr4PWk?= =?us-ascii?q?5/76Yrr6vZ+TKpV4hR/jPaQzgsC/AOI4PRYSX2WD5Oix2qPv8VfnTLhEivA6iL?= =?us-ascii?q?fVvZ/eKMgBuKK1HxdZ0oM55Ba+Czem3s4YnX4CLF9dZh2HjIzpO1DLIP/kDPaw?= =?us-ascii?q?mVesnSx2x//aJb3uH4/BIWben7f8Zbp98VJTyBIvzdBD4JJZEqkBL+/pVU/vtd?= =?us-ascii?q?zYFQQ0MxGozOb8FdpxzJ0RVn+SAqWBKqPdrUeI5v4zI+mLfIIapjf8JOIm5/P1?= =?us-ascii?q?kH82hUQdcrSz0ZQJdX+4A6cuH0LMeHHEg80ACiEVtxE+TerllFqEFzNfeiWcRa?= =?us-ascii?q?U5sxwhCYHuLoPCQ4u/ib/JiCq4GpxTbXJPCXiRGmzkMYiIRqFfO2qpPsZ9n2lc?= =?us-ascii?q?BvCaQIg72ETr7Veixg=3D=3D?= X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: =?us-ascii?q?A2DYAgBlCPFY/xT574RcDgwBAQEBAgEBA?= =?us-ascii?q?QEIAQEBARYBAQEDAQEBCQEBAYMouTABG4YIhAFDFAEBAQEBAQEBAQEBahQUgjM?= =?us-ascii?q?iAYMAP4toq0SIAQEHgwwBAQgBAQEBAQEBIYZRgV0rhCiDZoJogjEFiSIRh0JPi?= =?us-ascii?q?1OSZZFGj06EPDYhgQVDImUBgj+CHYE2XYoQAQEB?= X-IPAS-Result: =?us-ascii?q?A2DYAgBlCPFY/xT574RcDgwBAQEBAgEBAQEIAQEBARYBAQE?= =?us-ascii?q?DAQEBCQEBAYMouTABG4YIhAFDFAEBAQEBAQEBAQEBahQUgjMiAYMAP4toq0SIA?= =?us-ascii?q?QEHgwwBAQgBAQEBAQEBIYZRgV0rhCiDZoJogjEFiSIRh0JPi1OSZZFGj06EPDY?= =?us-ascii?q?hgQVDImUBgj+CHYE2XYoQAQEB?= X-IronPort-AV: E=Sophos;i="5.37,199,1488873600"; d="scan'208";a="76923641" X-Spam-Status: No X-Spam-Level: Received: from act-bufferout-a1.ucsd.edu ([132.239.249.20]) by iport-bcv3-out.ucsd.edu with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 14 Apr 2017 10:39:53 -0700 Received: from eklimczak-eth1.ucsd.edu (eklimczak-eth1.ucsd.edu [132.239.153.127]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) (Authenticated sender: eklimczak@ad.ucsd.edu) by act-bufferout-a1.ucsd.edu (Postfix) with ESMTPSA id C286AD8FF; Fri, 14 Apr 2017 10:39:53 -0700 (PDT) From: Erik Klimczak Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Mac OS X Mail 10.2 \(3259\)) Subject: IDA2017:002, IDA2017:001 Message-Id: <051F4502-5D04-493F-AEE0-7F3A95BABDBE@ucsd.edu> Date: Fri, 14 Apr 2017 10:39:53 -0700 Cc: Peter Davis , Erik Klimczak To: qc@iris.washington.edu X-Mailer: Apple Mail (2.3259) X-Virus-Scanned: by bsmtpd at iris.washington.edu Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by marvin2.iris.washington.edu id v3EHeRAn032147 DATA PROBLEM REPORT IDA2017:002 2017/04/13 IDA DCC Erik Klimczak IDA PALK II BH*-00,LH*-00,VH*-00 2017,066 - Problem Description OTHER The palk00 digitizer failed on day 2017,066-08:42. IDA engineers are arranging for the digitizer to be returned and repaired by the manufacturer. END _____________________________________________________________________________________________________________________________________ PROBLEM RESOLUTION REPORT IDA2017:001 2017/04/13 IDA Erik Klimczak Description of Problem Resolution RESOLUTION IDA station HOPE is back online as of day 2017,048, after the station operator restored data acquisition and replaced damaged VSAT equipment. END From eklimczak@ucsd.edu Thu Jun 29 15:34:07 2017 Return-Path: Received: from norman.iris.washington.edu (norman.iris.washington.edu [192.168.166.28]) by marvin2.iris.washington.edu (8.14.4/8.14.4) with ESMTP id v5TMY7ua019390 for ; Thu, 29 Jun 2017 15:34:07 -0700 Received: from barracuda.iris.washington.edu (mailin01.iris.washington.edu [192.168.167.28]) by norman.iris.washington.edu (8.14.4/8.14.4) with ESMTP id v5TMY56X022166 for ; Thu, 29 Jun 2017 15:34:07 -0700 Received: from mail-pf0-f195.google.com (mail-pf0-f195.google.com [209.85.192.195]) by barracuda.iris.washington.edu with ESMTP id nhKwrXXa2B1vZ0Ec for ; Thu, 29 Jun 2017 15:34:04 -0700 (PDT) Received: by mail-pf0-f195.google.com with SMTP id s66so14680815pfs.2 for ; Thu, 29 Jun 2017 15:34:04 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ucsd-edu.20150623.gappssmtp.com; s=20150623; h=from:content-transfer-encoding:mime-version:subject:message-id:date :cc:to; bh=Loef5Jms47QZlrliyb2IAJNA4y52peB1ksGlNHx9jxY=; b=vy+LzNasVCoEJYKj5DNs7bvGzMw75YUN5PzvwznZyvwUn0oHD6rbd1pxLPZYC4Sgme ap83zxn2oADeWpp9/DNeoZklWhDCLarycDuqpUfkjXmT+dhALhfK7YK/25SYC2bgd43S HoreoNr7ZplX2dBU/CLYq8Q96+gFzCDtlm965OMZNnN0nUe/gSI2hVN0jCuxb2TiDeAJ 4gj3QpgWW0GlHmR/vITAU1Pz/ijcio4lnPB5KWMWRaFN7p3iFZX7maQynSUpeGMQy5U1 oLZ+wYNe9wc5bsX1ogC88rNb4PrwLGYTwyyj1DLdwTBiQ4HG9P8EPisAXNw0jqcjpnIE kyDw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:content-transfer-encoding:mime-version :subject:message-id:date:cc:to; bh=Loef5Jms47QZlrliyb2IAJNA4y52peB1ksGlNHx9jxY=; b=WpJTMi0vACySu/Br3uVjnLRKRdZAeR9sq/u3JPLG1p2usqtCwNn7FeNjTk4XkPcv8o 5NTUZvk47EnhGiPxoE002xuEeMmbujuavA3QCk3uCKu/v8OXabthK/K5MFBpyrGt44qp FYrPwHwcGVLcTf81nD9ivTIBLszeLtHI7Y3algrpsKkYf03VEFRWgJlohgesK/hEru1L fgFNxB1aPGnikJufpvHOdyFrfPBzAF+8XP3GJR/PMhU93P+Sykhw61ZIUIeoi3dPr7ZY TzxjcvOFtbIVD3hWaZVp30IUu5+XIozUhCSXSskKlH/KJwtaeqMf7ZgIak2+nF2HyUaW BW3A== X-Gm-Message-State: AKS2vOzbRk8N+CwA/XbvBU9qeRY+D7CYfwmhWP7bUw8B8slyCIck/cSp H5/z+KAaFUfOw11xWm+U4A== X-Received: by 10.99.56.82 with SMTP id h18mr18126377pgn.52.1498775643918; Thu, 29 Jun 2017 15:34:03 -0700 (PDT) Received: from eklimczak-eth1.ucsd.edu (eklimczak-eth1.ucsd.edu. [132.239.153.127]) by smtp.gmail.com with ESMTPSA id j29sm12869083pfj.68.2017.06.29.15.34.03 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 29 Jun 2017 15:34:03 -0700 (PDT) From: Erik Klimczak Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Mac OS X Mail 10.3 \(3273\)) Subject: IDA2017:003, IDA2016:009 Message-Id: Date: Thu, 29 Jun 2017 15:34:02 -0700 Cc: Peter Davis , Erik Klimczak To: qc@iris.washington.edu X-Mailer: Apple Mail (2.3273) X-Virus-Scanned: by bsmtpd at iris.washington.edu Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by marvin2.iris.washington.edu id v5TMY7ua019390 DATA PROBLEM REPORT IDA2017:003 2017/06/29 IDA DCC Erik Klimczak IDA JTS II *** 2017,128 2017,178 Problem Description OTHER IDA station JTS was down after a lightning strike damaged the digitizers, GPS, and power equipment at the station. The station operator replaced one damaged digitizer with a temporary spare, connected the STS-2 to it, and restored power on day 2017,145. On day 2017,178 the station operator replaced the damaged power equipment, installed two permanent digitizers, and reconnected the STS-1 seismometers. END __________________________________________________________________________________________________ PROBLEM RESOLUTION REPORT IDA2016:009 2017/06/27 IDA Erik Klimczak Description of Problem Resolution RESOLUTION The CMG-3T seismometer was replaced with an STS-5 seismometer on day 2017,175. END ___________________________________________________________________________________________________ From eklimczak@ucsd.edu Mon Nov 13 17:04:42 2017 Return-Path: Received: from norman.iris.washington.edu (norman.iris.washington.edu [192.168.166.28]) by marvin2.iris.washington.edu (8.14.4/8.14.4) with ESMTP id vAE14g47012875 for ; Mon, 13 Nov 2017 17:04:42 -0800 Received: from barracuda.iris.washington.edu (mailin01.iris.washington.edu [192.168.167.28]) by norman.iris.washington.edu (8.14.4/8.14.4) with ESMTP id vAE14dO5008003 for ; Mon, 13 Nov 2017 17:04:42 -0800 Received: from mail-pf0-f173.google.com (mail-pf0-f173.google.com [209.85.192.173]) by barracuda.iris.washington.edu with ESMTP id CaDpMrvGBIXHelWR for ; Mon, 13 Nov 2017 17:04:38 -0800 (PST) Received: by mail-pf0-f173.google.com with SMTP id n89so13139248pfk.11 for ; Mon, 13 Nov 2017 17:04:38 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ucsd-edu.20150623.gappssmtp.com; s=20150623; h=from:mime-version:subject:message-id:date:cc:to; bh=TN/SarufzkN5ESkJ8kQbTWQYhGxR8OMqTdbA/REPR8Y=; b=sR2bd2De8M5GuJh0xcm/KbUif/T5b5gbNJJj/t1aYAMtFe2zihC78a7nRYJXT/Mt9p AKwQtnwDLmL7iDrIe9QFeUFua2X9n9Z7+70vZLP76YTyb3Q/jp6BNNmozWAMxTtzSAUX D9DoaNkFBqoPLeHk5ztrHcZQlYx4UhAy1/4Q+07eEPjWeLY/Ysjqw26hkUsCuJWzqTs7 7E5/fxNFRu2Z7uUltEb4h66+o1f1nCFoHkA27NVyjKJvd8F9nswKCEOJajfmdpu40hLU vRxple+baykeeALpCrTcDWa4vrs5Q9vnmNjKtkClPbbJSUCLFQuYWW5vHcJ6oMc6rjoZ S+5g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:mime-version:subject:message-id:date:cc:to; bh=TN/SarufzkN5ESkJ8kQbTWQYhGxR8OMqTdbA/REPR8Y=; b=BgLCnA6ZGXyQ8ZWbW4v9VBpWGDXf1lhwgIVVX2POqlUYL1xuetvz2gwUOZ+nNhwdl5 2tHXS4I4sccHy4cEzFgPw5i2dadlmO29UXzsaORQO9XtQX1ZgmgiTSSYgWAPkTuSa8k5 LMnMZi2YBoTxPrldBLGVg8jPJwrCCfk0mhOHsvA78R2XXk0njAC4UZmvoE2rEUnQNV7L 8zi7MC9zvqpkFff6UNKOiUkRM/TFlY68jp7ppyVwzTkxL98L/REv7gUMN8bP7rSSEdS7 mXrhKpFMRSyEeZbUqg07nkM3TbBtQKhzOOb6jj7AOf7YWJ5jOWKawrywmMBtid8GyURv iltw== X-Gm-Message-State: AJaThX4jxb/nzshUgbNYbWI07h0PebV0GUqVeYbb69hy8j2RswjGEH0u KisiKKa8W0OwnHhWMavoR9hfozv2pm0= X-Google-Smtp-Source: AGs4zMZr+TFfP/YplKKL+vEHK/wH4K+Die67QQesRMaT6qwLxjwoA+aX4XZEUYO2rTF77J1gtfzeNw== X-Received: by 10.98.4.67 with SMTP id 64mr11715880pfe.214.1510621478009; Mon, 13 Nov 2017 17:04:38 -0800 (PST) Received: from eklimczak-eth1.ucsd.edu (eklimczak-eth1.ucsd.edu. [132.239.153.127]) by smtp.gmail.com with ESMTPSA id a9sm21359637pff.31.2017.11.13.17.04.36 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 13 Nov 2017 17:04:36 -0800 (PST) From: Erik Klimczak Content-Type: multipart/alternative; boundary="Apple-Mail=_AF775944-B266-417F-B9D2-932827DDF9CE" Mime-Version: 1.0 (Mac OS X Mail 10.3 \(3273\)) Subject: IDA2017:004, IDA2017:005, IDA2016:012, IDA2017:002, IDA2015:015, IDA2013:006 Message-Id: <89E2E9B1-D6F8-4112-9C06-3F1FC8DBCAF6@ucsd.edu> Date: Mon, 13 Nov 2017 17:04:35 -0800 Cc: Peter Davis , Erik Klimczak To: qc@iris.washington.edu X-Mailer: Apple Mail (2.3273) X-Virus-Scanned: by bsmtpd at iris.washington.edu --Apple-Mail=_AF775944-B266-417F-B9D2-932827DDF9CE Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=us-ascii DATA PROBLEM REPORT IDA2017:004 2017/11/08 IDA DCC Erik Klimczak IDA PALK II *** 2017,246 2017,291 Problem Description OTHER IDA station PALK was down from day 2017,246 to 2017,291 due to a power = surge and subsequent power outage. Data acquisition was restored after the station operator replaced the = digitizer, surge suppressor, and circuit breaker. END DATA PROBLEM REPORT IDA2017:005 2017/11/08 IDA DCC Erik Klimczak IDA RAYN II *** 2017,223 - Problem Description OTHER IDA station RAYN is down due to failure of both station computers caused = by excessive heat in the recording room. A new AC unit and new computers were installed, however the station = remains down for reasons yet to be determined. END PROBLEM RESOLUTION REPORT IDA2016:012 2017/11/08 IDA Erik Klimczak Description of Problem Resolution RESOLUTION IDA engineers visited the station and replaced the defective Episensor = on day 2017,276-14:21. END PROBLEM RESOLUTION REPORT IDA2017:002 2017/11/08 IDA Erik Klimczak Description of Problem Resolution RESOLUTION The station operator restored data acquisition by replacing the faulty = digitizer on day 2017,291. END PROBLEM RESOLUTION REPORT IDA2015:015 2017/11/08 IDA Erik Klimczak Description of Problem Resolution RESOLUTION An IDA engineer visited the station and replaced the Episensor strong = motion sensor on day 2016,292. END PROBLEM RESOLUTION REPORT IDA2013:006 2017/11/08 IDA Erik Klimczak Description of Problem Resolution RESOLUTION An IDA engineer visited the station and replaced the CMG-3T seismometer with a Trillium 120PH seismometer on day 2016,069. END --Apple-Mail=_AF775944-B266-417F-B9D2-932827DDF9CE Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=us-ascii DATA PROBLEM REPORT =     IDA2017:004
2017/11/08 =        IDA DCC Erik Klimczak =     IDA
PALK    II =      *** =             &n= bsp;           2017= ,246   2017,291
Problem Description
OTHER

IDA station PALK was down from day 2017,246 = to 2017,291 due to a power surge and subsequent power outage.
Data = acquisition was restored after the station operator replaced the = digitizer, surge suppressor, and circuit breaker.

END



DATA PROBLEM REPORT =    IDA2017:005
2017/11/08 =         IDA DCC Erik Klimczak =    IDA
RAYN    II =        *** =             &n= bsp;        2017,223 =  -
Problem Description
OTHER

IDA = station RAYN is down due to failure of both station computers caused by = excessive heat in the recording room.
A new AC unit and new = computers were installed, however the station remains down for reasons = yet to be determined.

END




PROBLEM RESOLUTION REPORT =       IDA2016:012
2017/11/08      IDA =     Erik Klimczak
Description of Problem = Resolution
RESOLUTION

IDA engineers visited the = station and replaced the defective Episensor on day = 2017,276-14:21.

END


PROBLEM = RESOLUTION REPORT =       IDA2017:002
2017/11/08      IDA =     Erik Klimczak
Description of Problem = Resolution
RESOLUTION

The station operator = restored data acquisition by replacing the faulty digitizer on day = 2017,291.

END



PROBLEM RESOLUTION REPORT =       IDA2015:015
2017/11/08      IDA =     Erik Klimczak
Description of Problem = Resolution
RESOLUTION

An IDA engineer visited the = station and replaced the Episensor strong motion sensor on day = 2016,292.

END


PROBLEM RESOLUTION REPORT =       IDA2013:006
2017/11/08      IDA =     Erik Klimczak
Description of Problem = Resolution
RESOLUTION

An IDA engineer visited the = station and replaced the CMG-3T seismometer
with a = Trillium 120PH seismometer on day 2016,069.

END


= --Apple-Mail=_AF775944-B266-417F-B9D2-932827DDF9CE-- From eklimczak@ucsd.edu Tue Mar 13 15:01:08 2018 Return-Path: Received: from norman.iris.washington.edu (norman.iris.washington.edu [192.168.166.28]) by marvin2.iris.washington.edu (8.14.4/8.14.4) with ESMTP id w2DM18LS014317 for ; Tue, 13 Mar 2018 15:01:08 -0700 Received: from barracuda.iris.washington.edu (mailin01.iris.washington.edu [192.168.167.28]) by norman.iris.washington.edu (8.14.4/8.14.4) with ESMTP id w2DM16h6021393 for ; Tue, 13 Mar 2018 15:01:08 -0700 Received: from mail-pl0-f52.google.com (mail-pl0-f52.google.com [209.85.160.52]) by barracuda.iris.washington.edu with ESMTP id rTcryxhlDoXT16WH for ; Tue, 13 Mar 2018 15:01:00 -0700 (PDT) Received: by mail-pl0-f52.google.com with SMTP id w15-v6so593967plq.9 for ; Tue, 13 Mar 2018 15:01:00 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ucsd-edu.20150623.gappssmtp.com; s=20150623; h=from:mime-version:subject:message-id:date:cc:to; bh=Ifwklp5/VuLEPKdZcF0wgtf493ORpMfWRnueBllkyOI=; b=DdCOrib3on3wS1Elp5AykcCjsSXLZZM1H6A+2xgSI71pi46Z/I9S51qGy5PNJzViWH go2CB3a/nVz2LaDYxSTLzMe8AU/k9GplRP+CsS/odpHHEpNAyu4N0KqJUGacom7xLYdv l++R+piiiZ7LdoGZtO9rLQCVATk9iLtsaPfxIaCYAVm1rEJx3yIgIwiAV3hqQzO7jYdI 3G4ZpK1Aj9IiaU4w+Eq59z/D6qkKPsAm8uAfrqYD25k/NHRpiTM7/7316hRvRtotJnkj UEkKscra1OKUA1iuq37cnp205mmdpSBD89G2Bphoh8Ta6Y6XtJJiGst0p44HGCnFGvFt UwSQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:mime-version:subject:message-id:date:cc:to; bh=Ifwklp5/VuLEPKdZcF0wgtf493ORpMfWRnueBllkyOI=; b=iHUATieKW3lUY2bcoZqCcmNlFEa+i990jWX7bS7jjA8Hds6pefHPawNjy0XWNlISkt 5eXDXb9tV1AeULch6gi1uG17BEF4Sv1B0t8tdlNRfCg/6JojehZ5EpuF/dTpEHAZdRbY MMy8wx5GbGwucb8e8s02jYxFo5Mc4/0hoD/x50dXmqrGqNXKjTgTjbBZJceh3HFBWSRG RcLyTk7KR5COcqxu+8X9WRy0ZmNX/DeiEssAElUzpq6IzMtEEn+Og/Cu1c2Y22l4wmQo CL87cCBRJV149e9/jlzsxurc3LJfvn5UlUo+1h5qCQ7eWEU3zWUiwYGwSYNSZx47I5UK 9Uzg== X-Gm-Message-State: AElRT7HINMTiEaEu0Bj/LJKQcuAKFby8MYdwSaAFy1ZpU0wnjWE/EiuQ Vav3iAAgrTJhVv7abATI/m73PMQB95Y= X-Google-Smtp-Source: AG47ELuJ0O0hVAU5Sy27K9ZX0GG12x5oSwMR8aA2p9G/YxK1Ei5lXy7hsokNXisfEEFc+liB86Tk8Q== X-Received: by 2002:a17:902:227:: with SMTP id 36-v6mr1873403plc.134.1520978459185; Tue, 13 Mar 2018 15:00:59 -0700 (PDT) Received: from guestida.ucsd.edu (guestida.ucsd.edu. [132.239.152.204]) by smtp.gmail.com with ESMTPSA id n27sm1982678pgc.40.2018.03.13.15.00.57 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 13 Mar 2018 15:00:58 -0700 (PDT) From: Erik Klimczak Content-Type: multipart/alternative; boundary="Apple-Mail=_21048732-18BB-453D-992E-BD58C0193AF4" Mime-Version: 1.0 (Mac OS X Mail 11.2 \(3445.5.20\)) Subject: IDA2018:001, IDA2018:002, IDA2018:003, IDA2018:004, IDA2018:005, IDA2018:006, IDA2017:005 Message-Id: <66EAAC46-43CB-46A8-BF51-6C1CF81EF90B@ucsd.edu> Date: Tue, 13 Mar 2018 15:00:56 -0700 Cc: Peter Davis , Erik Klimczak To: qc@iris.washington.edu X-Mailer: Apple Mail (2.3445.5.20) X-Virus-Scanned: by bsmtpd at iris.washington.edu --Apple-Mail=_21048732-18BB-453D-992E-BD58C0193AF4 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=us-ascii DATA PROBLEM REPORT IDA2018:001 2018/03/13 IDA DCC Erik Klimczak IDA JTS II BH*-10,LH*-10,VH*-10 2017,341 = 2018,018 Problem Description DEAD CHANNEL Data quality for all channels from the STS-2 seismometer was poor = starting day 2017,341-13:47. =20 Data quality improved after the station operator replaced it with an = STS-2.5 seismometer on day 2018,018-18:30. END DATA PROBLEM REPORT IDA2018:002 2018/03/13 IDA DCC Erik Klimczak IDA KAPI II BH*-00,LH*-00,VH*-00,LN*-00,EN*-00 = 2017,348 2018,059 Problem Description OTHER All channels from the kapi-00 seismometer showed excessive gapping due = to a faulty digitizer on day 2017,348. The station operator restored normal data acquisition by replacing the = faulty digitizer and reconfiguring connections between=20 the digitizer and station computers on day 2018,059. END DATA PROBLEM REPORT IDA2018:003 2018/03/13 IDA DCC Erik Klimczak IDA MSVF II *** 2017,329 2018,060 Problem Description OTHER IDA station MSVF was down from day 2017,329-14:31 to 2018,060-11:10 due = to a faulty power supply and lost communication between the digitizers and station computers. Data acquisition was restored = after the station operator replaced the power supply, and an IDA engineer visited the station and replaced the LAN extenders and = msvf00 digitizer. END DATA PROBLEM REPORT IDA2018:004 2018/03/13 IDA DCC Erik Klimczak IDA UOSS II *** 2018,004 2018,024 Problem Description OTHER IDA station UOSS was down from day 2018,004 to 2018,024 due to a faulty = digitizer and unlocked GPS clock. Timing for data from the uoss10 digitizer was restored when the station operator moved = the GPS connection to the uoss10 digitizer on day 2018,024. END DATA PROBLEM REPORT IDA2018:005 2018/03/13 IDA DCC Erik Klimczak IDA UOSS II BH*-00,LH*-00,VH*-00,LN*-00,EN*-00 = 2018,004 2018,066 Problem Description OTHER Data acquistion from the uoss00 digitizer ceased on day 2018,004 due to = a faulty digitizer. Data acquisition was restored after the station operator replaced the uoss00 digitizer on day = 2018,066. END DATA PROBLEM REPORT IDA2018:006 2018/03/13 IDA DCC Erik Klimczak IDA MSEY II *** 2018,058 2018,072 Problem Description OTHER IDA station MSEY was down from day 2018,058 to 2018,072 due to = communication problems between the digitizers and station computers. Data acquisition was restored after the station operator = visited the station and reconfigured the cable connections to the switch at the wellhead. END PROBLEM RESOLUTION REPORT IDA2017:005 2018/03/13 IDA Erik Klimczak Description of Problem Resolution RESOLUTION The station is up as of day 2018,027-08:55 after IDA engineers visited = the station and installed a new Q330 digitizer, a Trillium T360 seismometer and moved and re-installed the STS-5 = seismometer. END= --Apple-Mail=_21048732-18BB-453D-992E-BD58C0193AF4 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=us-ascii DATA = PROBLEM REPORT    IDA2018:001
2018/03/13 =         IDA DCC Erik Klimczak =    IDA
JTS    II =        BH*-10,LH*-10,VH*-10 =             &n= bsp;        2017,341 =  2018,018
Problem Description
DEAD CHANNEL

Data = quality for all channels from the STS-2 seismometer was poor starting = day 2017,341-13:47.      
Data = quality improved after the station operator replaced it with an STS-2.5 = seismometer on day 2018,018-18:30.

END


DATA PROBLEM REPORT =    IDA2018:002
2018/03/13 =         IDA DCC Erik Klimczak =    IDA
KAPI    II =        BH*-00,LH*-00,VH*-00,LN*-00,EN*-= 00 =             &n= bsp;    2017,348  2018,059
Problem = Description
OTHER

All channels from the kapi-00 seismometer = showed excessive gapping due to a faulty digitizer on day = 2017,348.
The station operator restored normal data acquisition = by replacing the faulty digitizer and reconfiguring connections = between 
the digitizer and station computers on day = 2018,059.

END


DATA PROBLEM REPORT =     IDA2018:003
2018/03/13 =        IDA DCC Erik Klimczak =     IDA
MSVF    II =      *** =             &n= bsp;           2017= ,329   2018,060
Problem Description
OTHER

IDA station MSVF was down from day = 2017,329-14:31 to 2018,060-11:10 due to a faulty power supply and lost = communication between
the digitizers and station computers. =   Data acquisition was restored after the station operator = replaced the power supply, and
an IDA engineer visited the = station and replaced the LAN extenders and msvf00 digitizer.

END


DATA PROBLEM REPORT =     IDA2018:004
2018/03/13 =        IDA DCC Erik Klimczak =     IDA
UOSS    II =      *** =             &n= bsp;           2018= ,004   2018,024
Problem Description
OTHER

IDA station UOSS was down from day 2018,004 = to 2018,024 due to a faulty digitizer and unlocked GPS clock. Timing for = data
from the uoss10 digitizer was restored when the station = operator moved the GPS connection to the uoss10 digitizer on day = 2018,024.

END


DATA PROBLEM REPORT =     IDA2018:005
2018/03/13 =        IDA DCC Erik Klimczak =     IDA
UOSS    II =       BH*-00,LH*-00,VH*-00,LN*-00,EN*-00 =             &n= bsp;          2018,004 =   2018,066
Problem Description
OTHER

Data acquistion from the uoss00 digitizer = ceased on day 2018,004 due to a faulty digitizer.  Data acquisition = was restored
after the station operator replaced the uoss00 = digitizer on day 2018,066.

END


DATA PROBLEM REPORT =     IDA2018:006
2018/03/13 =        IDA DCC Erik Klimczak =     IDA
MSEY    II =      *** =             &n= bsp;           2018= ,058   2018,072
Problem Description
OTHER

IDA station MSEY was down from day 2018,058 = to 2018,072 due to communication problems between the digitizers and = station
computers.  Data acquisition was restored after the = station operator visited the station and reconfigured the cable = connections
to the switch at the wellhead.

END


PROBLEM RESOLUTION REPORT =   IDA2017:005
2018/03/13 =       IDA =      Erik Klimczak
Description of Problem Resolution
RESOLUTION

The station is up as of day 2018,027-08:55 = after IDA engineers visited the station and installed a new Q330 = digitizer,
a Trillium T360 seismometer and moved and re-installed = the STS-5 seismometer.

END
= --Apple-Mail=_21048732-18BB-453D-992E-BD58C0193AF4-- From gillian@iris.washington.edu Thu Mar 29 13:18:32 2018 Return-Path: Received: from norman.iris.washington.edu (norman.iris.washington.edu [192.168.166.28]) by marvin2.iris.washington.edu (8.14.4/8.14.4) with ESMTP id w2TKIWaX029430 for ; Thu, 29 Mar 2018 13:18:32 -0700 Received: from hub.iris.washington.edu (hub.iris.washington.edu [192.168.166.46]) by norman.iris.washington.edu (8.14.4/8.14.4) with ESMTP id w2TKIT5B003884 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO) for ; Thu, 29 Mar 2018 13:18:32 -0700 Received: from localhost (localhost.localdomain [127.0.0.1]) by hub.iris.washington.edu (Postfix) with ESMTP id 838BDCC03E2 for ; Thu, 29 Mar 2018 13:18:29 -0700 (PDT) X-Virus-Scanned: amavisd-new at hub.iris.washington.edu Received: from hub.iris.washington.edu ([127.0.0.1]) by localhost (hub.iris.washington.edu [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id Frbt43zfZBZ0 for ; Thu, 29 Mar 2018 13:18:29 -0700 (PDT) Received: from redfish.iris.washington.edu (redfish.iris.washington.edu [192.168.166.73]) by hub.iris.washington.edu (Postfix) with ESMTPSA id 6C5A7CC01DD for ; Thu, 29 Mar 2018 13:18:29 -0700 (PDT) From: Gillian Sharer Content-Type: text/plain; charset=utf-8 Mime-Version: 1.0 (Mac OS X Mail 10.3 \(3273\)) Subject: OBSIP2018:001,OBSIP2018:002,OBSIP2018:003 Message-Id: <3F63BBC6-8BB0-4BF7-A9C5-449AB053F6B9@iris.washington.edu> Date: Thu, 29 Mar 2018 13:19:34 -0700 To: qc@iris.washington.edu X-Mailer: Apple Mail (2.3273) Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by marvin2.iris.washington.edu id w2TKIWaX029430 DATA PROBLEM REPORT OBSIP2018:001 2018/03/29 OBSIP DCC Kasey Aderhold OBSIP SS45 XW */* 2016,300,00:00:00 2016,337,23:59:59 Problem Description INCORRECT TIME SEED COMMENT REFERENCE Irreconcilable timing errors exist for sites SS45 and SS55. A summary of the data investigation will be included (“Trehu-SS45-SS55-timing-issues.pdf”) in the network metadata folder at the DMC. END DATA PROBLEM REPORT OBSIP2018:002 2018/03/29 OBSIP DCC Kasey Aderhold OBSIP SS55 XW */* 2016,301,00:00:00 2016,336,23:59:59 Problem Description INCORRECT TIME SEED COMMENT REFERENCE Irreconcilable timing errors exist for sites SS45 and SS55. A summary of the data investigation will be included (“Trehu-SS45-SS55-timing-issues.pdf”) in the network metadata folder at the DMC. END DATA PROBLEM REPORT OBSIP2018:003 2018/03/29 OBSIP DCC Kasey Aderhold OBSIP 110B YQ HH1,HH2 2015,059,00:00:00 2015,298,23:59:59 Problem Description DUPLICATE DATA SEED COMMENT REFERENCE Recorded data for the two horizontal channels was identical. Data was removed from the HH2 channel to alert data users of this issue. A summary of the data investigation will be included in the network metadata folder at the DMC. END From kasey@iris.edu Tue Apr 17 11:29:29 2018 Return-Path: Received: from norman.iris.washington.edu (norman.iris.washington.edu [192.168.166.28]) by marvin2.iris.washington.edu (8.14.4/8.14.4) with ESMTP id w3HITTtY008814 for ; Tue, 17 Apr 2018 11:29:29 -0700 Received: from barracuda.iris.washington.edu (mailin01.iris.washington.edu [192.168.167.28]) by norman.iris.washington.edu (8.14.4/8.14.4) with ESMTP id w3HITRTc011284 for ; Tue, 17 Apr 2018 11:29:29 -0700 Received: from mail.iris.edu (mail.iris.edu [192.35.78.3]) by barracuda.iris.washington.edu with ESMTP id GCsJaP5pkbTEuy7y for ; Tue, 17 Apr 2018 11:29:26 -0700 (PDT) Received: from dyn218.iris.edu (dyn218.iris.edu [192.35.78.218]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: kasey@mail.iris.edu) by mail.iris.edu (Postfix) with ESMTPSA id 667229A82 for ; Tue, 17 Apr 2018 14:29:26 -0400 (EDT) From: Kasey Aderhold Subject: OBSIP DPRs To: qc@iris.washington.edu Message-ID: <3d9f71cc-42ff-6714-b661-ef517675ce7d@iris.edu> Date: Tue, 17 Apr 2018 14:29:26 -0400 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.13; rv:52.0) Gecko/20100101 Thunderbird/52.7.0 MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit Content-Language: en-US X-Virus-Scanned: by bsmtpd at iris.washington.edu DATA PROBLEM REPORT    OBSIP2018:004 2018/04/12    OBSIP DCC    Kasey Aderhold    OBSIP G19D    7D    */*    2014,261,00:00:00    2015,257,23:59:59 Problem Description POSSIBLE CHANNEL/POLARITY SWAP SEED COMMENT REFERENCE Channels and polarity may be incorrect for this station.   A summary of the data investigation will be included in the network metadata folder at the DMC. END DATA PROBLEM REPORT    OBSIP2018:005 2018/04/12    OBSIP DCC    Kasey Aderhold    OBSIP G02D    7D    */*    2014,259,00:00:00    2015,255,23:59:59 Problem Description POSSIBLE CHANNEL/POLARITY SWAP SEED COMMENT REFERENCE Channels and polarity may be incorrect for this station.   A summary of the data investigation will be included in the network metadata folder at the DMC. END DATA PROBLEM REPORT    OBSIP2018:006 2018/04/12    OBSIP DCC    Kasey Aderhold    OBSIP OS129    1E    */*    2015,326,00:00:00    2015,343,23:59:59 Problem Description CF CARD FAILURE SEED COMMENT REFERENCE No data is archived for this station due to a CF card failure. END DATA PROBLEM REPORT    OBSIP2018:007 2018/04/12    OBSIP DCC    Kasey Aderhold    OBSIP OS187    1E   */*    2015,325,00:00:00    2015,344,23:59:59 Problem Description CF CARD FAILURE SEED COMMENT REFERENCE No data is archived for this station due to a CF card failure. END From eklimczak@ucsd.edu Tue May 8 15:02:28 2018 Return-Path: Received: from norman.iris.washington.edu (norman.iris.washington.edu [192.168.166.28]) by marvin2.iris.washington.edu (8.14.4/8.14.4) with ESMTP id w48M2Spw012531 for ; Tue, 8 May 2018 15:02:28 -0700 Received: from barracuda.iris.washington.edu (mailin01.iris.washington.edu [192.168.167.28]) by norman.iris.washington.edu (8.14.4/8.14.4) with ESMTP id w48M2QAl023663 for ; Tue, 8 May 2018 15:02:28 -0700 Received: from mail-pl0-f50.google.com (mail-pl0-f50.google.com [209.85.160.50]) by barracuda.iris.washington.edu with ESMTP id TlkHGxpfASx2Q0OX for ; Tue, 08 May 2018 15:02:24 -0700 (PDT) Received: by mail-pl0-f50.google.com with SMTP id bi12-v6so3015194plb.12 for ; Tue, 08 May 2018 15:02:24 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ucsd-edu.20150623.gappssmtp.com; s=20150623; h=from:content-transfer-encoding:mime-version:subject:message-id:date :cc:to; bh=kh5ySJgg3+RNb67ZaSR9sB6lS7xw0oD0cDXy/9AK4yQ=; b=ry2TClLvh4hRxFR0AaO5/9GJ0mo2M81asZyzqSsvaXRzKgn073Bsyb6VMUU8iW43vW H7NiWQsdJTK5WaOst/QmkmJoiu7kg7U+IHVXaiDAL5cYgk78Umf3g1vvPjzi+faziux8 Kjut1nIen7PtqeJcQoMMCmqBULo09/Fa2I0xkB40RbNTuXt9O2h/By0rDUOVigPSgfjc slfUZKQpl2R7HT2ab+YBLnc9Pwtu0Co9V/U4xVOBDVbpHneaRaNx7SU8DUQraeZao0oU zHymbzCGiVO2hUtVNpsme/eeht3lBtL2nbbvjEfUQti4n9CVRIYz0GSY80m0KJZ89jPE IlBg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:content-transfer-encoding:mime-version :subject:message-id:date:cc:to; bh=kh5ySJgg3+RNb67ZaSR9sB6lS7xw0oD0cDXy/9AK4yQ=; b=tvi3ki/Up8pGku6gvg1WiwyfrO0eH40YniLX2KddqkpTKT3I4TE9gbTxaOnjK+ukv7 aPjTlz/eVVEG4gv14EdUZHqo0KAI6hEpa9jaWIRv2jvHewRC5b/fEqnxwM+dXpCDchhf G5OQGR50ItxUUgzWEGoOXkSa4qI3++LoUcYgwgCaHFaixzZDAyeMTbNuUqsOybzYhztN Az53DvRM+PF5kRY/3+lx9SttYEBIUiHgQRrFCNURGgY4B97epJoPjXzzje3qLEdEu8kq XuzlBEFllVHiOtSHjRlbTHj1pPB/W1dz3W8yRFIFS1szrvLmaK3iuhVapQ4KzeKkY8ao GDng== X-Gm-Message-State: ALQs6tDd/wJuaZtbNyOoDA4khL0MCITqMhvVe2jUFYC1rflBszDAJzmT 7iPAL0+A5BkcVh7iJ2rYq6MSUQ3+OUw= X-Google-Smtp-Source: AB8JxZqeFPw5OKRggyrU8JJ7OaC6kWQQbt0zr3DLZE0m6G1xk+4WuUTpGHa13UP3jwpqyuX5P5jvgw== X-Received: by 2002:a17:902:598d:: with SMTP id p13-v6mr43188045pli.191.1525816944333; Tue, 08 May 2018 15:02:24 -0700 (PDT) Received: from guestida.ucsd.edu (guestida.ucsd.edu. [132.239.152.204]) by smtp.gmail.com with ESMTPSA id a5sm56442109pff.8.2018.05.08.15.02.22 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 08 May 2018 15:02:23 -0700 (PDT) From: Erik Klimczak Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Mac OS X Mail 11.2 \(3445.5.20\)) Subject: IDA2018:007, IDA2018:008, IDA2018:009, IDA2018:010 Message-Id: <196302E0-3B56-467B-A9E0-CF6EF23978B6@ucsd.edu> Date: Tue, 8 May 2018 15:02:22 -0700 Cc: Peter Davis , Erik Klimczak To: qc@iris.washington.edu X-Mailer: Apple Mail (2.3445.5.20) X-Virus-Scanned: by bsmtpd at iris.washington.edu Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by marvin2.iris.washington.edu id w48M2Spw012531 DATA PROBLEM REPORT IDA2018:007 2018/05/08 IDA DCC Erik Klimczak IDA EFI II LN*00,EN*00 2018,061 - Problem Description DEAD CHANNEL All channels from the Episensor strong motion sensor are non-seismic following a large offset on day 2018,061-02:03. A replacement Episensor has been shipped to the station. END DATA PROBLEM REPORT IDA2018:008 2018/05/08 IDA DCC Erik Klimczak IDA WRAB II BHZ-00,LHZ-00,VHZ-00 2017,329 - Problem Description OTHER There is excessive background noise on the vertical channels from the KS54000 seismometer since day 2017,329-15:33 for reasons yet to be determined. END DATA PROBLEM REPORT IDA2018:009 2018/05/08 IDA DCC Erik Klimczak IDA PALK II LN*00,EN*00 2017,321 - Problem Description DEAD CHANNEL All channels from the Episensor strong motion sensor are non-seismic as of day 2017,321-08:55 due to a faulty sensor. A replacement Episensor has been shipped to the station. END DATA PROBLEM REPORT IDA2018:010 2018/05/08 IDA DCC Erik Klimczak IDA KAPI II BHZ-00,LHZ-00,VHZ-00 2018,124 - Problem Description OTHER Data quality for the vertical channels from the KS54000 seismometer is poor. IDA engineers are planning a station visit to replace the KS54000 seismometer with a Trillium 360 borehole seismometer. END