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 *************************