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Active Message Threads for February 2017
how to install sac in Ubuntu and windows?
please explain elaborately because i m new..
Replies
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Re: install sac - Emily Wolin - 2017-02-28 18:18:58
i have converted a binary data file(seismogram.sac) to alpha numeric data
file(seismogram.con.sac) using below command.
>convert from sac seismogram.sac to alpha seismogram.con.sac
whem i try to read this converted file using below command
>r alpha seismogram.con.sac
some times it works but sometimes it shows error that file doesn't exist.
help with this.
after conversion ,i extracted amplitudes from convereted data file using
below commamd to a text file(amp.txt)
>tail -n +31 seismogram.con.sa…
[more]
No replies
Maria Luíza Cardoso
2017-02-23 14:41:38
- 2017-02-27 22:37:03
Hi everyone
Suddenly I'm having this problem with MERGE command and I don't know why. I tried to merge several SAC files using 'merge overlap average' however keeps appearing the following message:
SAC> r *n
1305_2016.146.13.05.33.n 1311_2016.146.13.11.37.n 1400_2016.146.14.00.00.n 1500_2016.146.15.00.00.n 1600_2016.146.16.00.00.n 1700_2016.146.17.00.00.n 1800_2016.146.18.00.00.n 1900_2016.146.19.00.00.n 2000_2016.146.20.00.00.n 2100_2016.146.21.00.00.n 2200_2016.146.22.00.00.n 2300_2016.146…
[more]
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Re: ERROR 108: File does not exist: overlap - Milton Plasencia - 2017-02-27 22:37:03
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Re: ERROR 108: File does not exist: overlap - Maria Luíza Cardoso - 2017-03-02 14:14:37
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Re: ERROR 108: File does not exist: overlap - mohammad enayat - 2020-04-29 15:57:48
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Maria Luíza Cardoso
2017-01-26 02:16:29
- 2017-02-23 14:31:06
Hi guys,
I'm having troubles trying to merge a large number of noise files. I have SAC files of 1 hour each and I want to obtain first a file of a day and then a file of a week. It's the first time I'm using SAC, so my knowledge is limited. I'm trying to merge them however a message error keeps appearing:
ERROR 1801: Header field mismatch: Time Sampling [DELTA]: 0.002000 0.010000
Does anyone know how to fix this time sampling mismatch? All help is welcome!
Cheers!
Replies
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Re: How to join multiple SAC file to make one SAC file? - George Helffrich - 2017-01-26 20:06:36
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Re: How to join multiple SAC file to make one SAC file? - Maria Luíza Cardoso - 2017-02-23 14:31:06
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Hi,
Anyone using STF for waveform modeling? I have downloaded stf from
http://www.eri.u-tokyo.ac.jp/ETAL/KIKUCHI/; unzipped and untared giving me
two directories: Main, Subroutine and one text file: Makefile(text file).
How do I compile the Fortran codes in Main so as to end up with the
following:
mk_conv.farm.pl
i_conv.farm
sacmacro
i_plotw
i_green
i_inversion
i_graphics
jb.ptime
jb.stime
jb.table
fort.22
Regards,
Josphat
-----------------------------------------
The University of Nair…
[more]
Replies
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Re: Source Time Function (STF) - Geo . - 2017-02-22 18:15:56
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Re: Source Time Function (STF) - Josphat Mulwa - 2017-02-22 21:55:13
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Re: Source Time Function (STF) - Geo . - 2017-02-22 20:23:11
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Re: Source Time Function (STF) - Josphat Mulwa - 2017-03-01 20:38:29
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Re: Source Time Function (STF) - Geo . - 2017-03-01 18:46:52
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Hi,
I need to get the package running on my system (64-bit Linux systems, I have already downloaded it and expanded the .tar.gz file, but I don't know how to run it?
when I type: ./sac I get: ERROR: Environmental variable SACAUX not defined.
Could you please help me? (I'm very beginner on linux, almost don't know anything).
thank you,
Sherry
Replies
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Re: install the SAC - Josphat Mulwa - 2017-02-22 17:24:03
Hello Everyone,
I am a new sac user and want to do an arithmetic operation on sac header.
My user0 headers contains ray parameter values in sec/rad and want it to
convert to sec/km and store it in user4.
Please help me in this regard.
Thank you very much.
*Sachin Kumar *
*Junior Research Fellow (JRF)*
*Dept. of Applied Geophysics*
*Indian School Of Mines, Dhanbad*
*Jharkhand- 826004, India.*
*Mobile No.:+91-7631056163, +91-8540016927*
*Email : **sachinism15@gmail.com <sachinism15@gmail.com>…
[more]
Replies
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Re: Need help - Geo . - 2017-02-20 17:47:20
Hi,
I posted this question earlier and I was unable to get any feedback. I
am using instrument corrected SAC files (attached) having file type m/s to
create a stacked file. I am using "SUMSTACK" to stack the files as follows:
SAC> r 2016.254.00.45.FARN3.BHE.corrected.bp.SAC
2016.254.00.45.FARN4.BHE.corrected.bp.SAC
2016.254.00.45.FARN5.BHE.corrected.bp.SAC
SAC> sss
Signal Stacking Subprocess.
SAC/SSS> timewindow 0 359.99
SAC/SSS> sumstack normalization on
SAC/SSS> writestack 2016.254.00.45…
[more]
Replies
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Re: Waveform stacking - George Helffrich - 2017-02-09 21:03:18
Hi everyone
I am having problem (probably) related to some maximum length of the seismic data within Sac.
I have been dealing with some really crappy seismic data with messed-up timing. 3 Traces from the same sensor. The data had frequent gaps in them and for some reason, the gaps are occasionally of different lengths for different components. I have about 1 month of continuous record (100 Hz sampling). My timing correction included:
1. Merging all the files from one component together (have…
[more]
Replies
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Re: Problem with merging large files - Brian Savage - 2017-02-08 15:46:43
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RE: Problem with merging large files - Lukas Janku - 2017-02-09 03:58:47
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Hi,
I am using instrument corrected SAC files (attached) having file type
m/s to create a stacked file. I am using "SUMSTACK" to stack the files as
follows:
SAC> r 2016.254.00.45.FARN3.BHE.corrected.bp.SAC
2016.254.00.45.FARN4.BHE.corrected.bp.SAC
2016.254.00.45.FARN5.BHE.corrected.bp.SAC
SAC> sss
Signal Stacking Subprocess.
SAC/SSS> timewindow 0 359.99
SAC/SSS> sumstack normalization on
SAC/SSS> writestack 2016.254.00.45.FARN345.stack.SAC
I checked the header of the stacked file (attache…
[more]
No replies
Hi,
I am using "sumstack" to stack SAC files. I checked the header of the
stacked file and the file type is time series file. I want to make
spectrogram of ground motion (m/s) using stacked file. Is it possible to
stack instrument corrected SAC files such that the stacked file represent
ground velocity in meter/second. I would be grateful for any suggestion in
this regard.
Thanks
Abhash Kumar
No replies
Can anyone help me in generating a H-K stack plot(Zhu and Kanamori) to compute poisson ratio from teleseismic receiver functions? Is there any routine on SAC to do it?
Sincerely,
Samarth
Replies
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Re: H-K stacking - Januka Attanayake - 2014-03-31 21:23:32
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Re: H-K stacking - George Helffrich - 2014-04-01 05:39:45
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Re: H-K stacking - S B - 2017-02-07 23:05:24
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Hello,
I have to convert my antelope database into sac files. I have been using db2sac without problem, but I am not sure db2sac can handle polarity reversal ( I have a bunch of L22 sensors for which I will have to correct for polarity). Since I couldn’t find anywhere if db2sac support this conversion, I have been trying to use rdseed v5.3.1. In order to populate the header I am using my dataless in this fashion: rdseed -d -o 1 -z 1 -f myday_volumes(miniseed) -g mydata.dataless.
I can convert…
[more]
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Re: rdseed problem with header information - Robert Casey - 2017-02-07 16:18:18
Dear Madam/Sir,
I have some problems in building SAC in cygwin. I have listed my
questions in order as follows:
1. I am using Windows and I installed "cygwin". However, I could not
open "aux" file in Windows and I tried to change its name as ",aux".
In "Makefile" files I replaced "aux" with ",aux", however I think that
I miss a point. How can i solve this "aux" problem?
2. My second question is ".dll" files are missed, how can I get them?
Sincerely yours
Ekin Ozlu
Middle East Tech…
[more]
Replies
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SAC Error Questions - Ekin Ozlu - 2017-02-06 19:06:54
I’ve had this problem in SAC when I read in high sampling rate (1000 Hz) data. When I plot it, it looks like it didn’t read in correctly (see attached figure). Is this a memory problem?
[cid:51345AAB-F408-41A6-A6F9-B4AC3FFCB01A@hsd1.ut.comcast.net]
Thanks,
------------------------------------------
Jamie Farrell
Research Assistant Professor
Seismograph Stations
Dept. of Geology & Geophysics
University of Utah
115 S. 1460 E. FASB Rm 212
Salt Lake City, UT 84112
jamie.farrell…
[more]
Replies
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RE: problems reading in 1000Hz data - Lukas Janku - 2017-02-02 13:44:22
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Re: problems reading in 1000Hz data - Jamie Farrell - 2017-02-02 13:49:29
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Hi,
I just installed SAC to my Mac running OS10.12 Sierra. The installation
email says that the distribution runs on OS10.7-10.9. I am having problems
reading in data and keep receiving the same error:
ERROR 1318: Header in disk file is out of date
Header version number is incorrect.
Header seems byte-swapped -- byte-swap file and retry.
I am wondering if this is due to the operating system or some other issue
with my installation.
Thanks,
Isabel
Replies
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Re: Error Read in SAC files - Brian Savage - 2017-02-01 21:44:40
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Re: Error Read in SAC files - White, Isabel - 2017-02-01 19:56:40
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Re: Error Read in SAC files - Geo . - 2017-02-02 05:02:07
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Re: Error Read in SAC files - White, Isabel - 2017-02-01 21:51:12
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Re: Error Read in SAC files - Arthur Snoke - 2017-02-02 00:01:44
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Re: Error Read in SAC files - White, Isabel - 2017-02-01 22:13:21
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Re: Error Read in SAC files - Brian Savage - 2017-02-02 00:27:16
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Re: Error Read in SAC files - Arthur Snoke - 2017-02-02 01:37:24
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Re: Error Read in SAC files - White, Isabel - 2017-02-02 00:55:54
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Hi,
I am curious to know about controlling water level in SAC. I am using
TRANSFER to remove the instrument response but unable to find an option to
do so.
Thanks,
Umair
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