A forum for SAC users to exchange ideas and ask questions about SAC usage, installation, portability, etc.
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Active Message Threads for October 2020
Vivek.G.Babu
Hi,
I have stations cross correlated files(.) with SAC headers. I found out the
maximum and minimum values of epicentral distance (dist) is 418.29 and
10.24 respectively.
but when I plot epicentral vs distance plot using GMT pssac, the plot
comes up with a max and minimum value around ~425km and ~20km.
It would be so great if you could give some suggestion regarding this.
Thank you very much
Replies
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Re: Discrepancy in the values in epicentral distance (km) - Vivek.G.Babu - 2020-11-03 00:06:10
Carmen Pro
Hi sac users,
In the deconvolution procedure to recover ground velocity or displacement, I have observed in several records for the 1997-11-28 Bolivia earthquake that a new frequency is introduced at the beginning of the seismogram. This is very confusing because the character of the first arrival seems changed. As an example, the case of station SJG is attached.
Could you tell me the reason and how to solve it?
Thank you very much
Regards
Carmen Pro
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[more]
Replies
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Re: deconvolution - Geo . - 2020-10-29 23:44:17
sanjay Singh Negi
2020-10-27 10:19:37
- 2020-10-28 22:55:33
Hi Sac users,
I have OBS record that follows the right-handed
system in which H2 component is 90 degree counter-clockwise of H1.
Horizontal component data file are as following:
2018.128.01.00.45.420.X.sac ---> East component
2018.128.01.00.45.420.Y.sac ----> North component
2018.128.01.00.45.420.Z.sac ----> Vertical component
The orientation correction angle is 80 degree.
For rotation, I use the following scheme:
sac>> read 2018.128.01.00.45.420.Y.sac 2018.128.0…
[more]
Replies
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Re: Regarding rotation of seismogram for right handed system - Geo . - 2020-10-27 23:10:35
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Re: Regarding rotation of seismogram for right handed system - Nabelek, John - 2020-10-27 19:46:33
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Re: Regarding rotation of seismogram for right handed system - sanjay Singh Negi - 2020-10-28 18:28:05
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Re: Regarding rotation of seismogram for right handed system - Nabelek, John - 2020-10-28 15:24:17
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Re: Regarding rotation of seismogram for right handed system - sanjay Singh Negi - 2020-10-28 22:55:33
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Re: Regarding rotation of seismogram for right handed system - Arthur Snoke - 2020-12-03 13:11:41
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Re: Regarding rotation of seismogram for right handed system - sanjay Singh Negi - 2020-12-04 10:28:58
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Derek Schutt
2020-10-20 18:18:32
- 2020-10-26 21:50:28
Hi All,
I’ve just installed SAC version 10.6d-grh110/116 (102.0) and xquartz on a Mac running OS 10.14.6. However I am getting this error, and indeed when I look in /usr/local/sac/aux/ctables, file raster does not exist.
SAC/SSS> prs
ERROR 108: File does not exist: /usr/local/sac/aux/ctables/raster
/usr/local/sac/aux/ctables]$ ls
16.level blue.red color.tbl1.sac grayscale grn.white.linear rainbow std.gamma.II
16.level.II …
[more]
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Re: File does not exist: /usr/local/sac/aux/ctables/raster - Leigh House - 2020-10-26 15:07:19
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Re: File does not exist: /usr/local/sac/aux/ctables/raster - Brian Savage - 2020-10-26 17:24:26
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Re: File does not exist: /usr/local/sac/aux/ctables/raster - Derek Schutt - 2020-10-26 21:50:28
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Re: File does not exist: /usr/local/sac/aux/ctables/raster - Leigh House - 2020-10-26 17:52:37
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Ryann Lam (rclam)
To whom it may concern,
I am a first year graduate student at the University of Memphis for the Center for Earthquake Research and Information. I need to use SAC for my global seismology class, but I'm very new to the terminal command line and I'm having difficulty installing SAC.
Neither < tar -xzf sac-102.0-mac.tar.gz > or < gzip -d -c sac-102.0-mac.tar.gz | tar -xf - >worked for me (the command prompts provided in the email with the file) when I entered them. I had been in the directory (…
[more]
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Re: SAC Software: Mac - Geo . - 2020-10-23 04:51:44
Jamie Farrell
2020-10-07 16:43:55
- 2020-10-09 10:47:18
Is there a keystroke to push to find out exactly what time the cursor is on in Sac 101.6a?
------------------------------------------
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@utah.edu (email)
801-581-7856 (voice)
801-585-5585 (fax)
https://quake.utah.edu/about-us/uuss-staff-directory/dr-jamie-farrell
Replies
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Re: key stroke to find what time the cursor is on? - Cliff Thurber - 2020-10-07 17:02:54
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Re: key stroke to find what time the cursor is on? - George Helffrich - 2020-10-07 18:03:24
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Re: key stroke to find what time the cursor is on? - Jamie Farrell - 2020-10-07 11:07:45
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Re: key stroke to find what time the cursor is on? - Arthur Snoke - 2020-10-09 10:47:18
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Sam Tang
