SAC Help

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

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
Carmen
2020-10-29 10:43:08 - 2020-10-29 23:44:17
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 -- _________________________________... [more]
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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... [more]
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Derek
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]
Ryann Lam (rclam)
2020-10-09 06:25:04 - 2020-10-23 04:51:44
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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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
Sam Tang
hi,
2020-10-02 08:31:25 - 2020-10-07 20:15:30
[image: image.png] The location of legend is not good.How to modify it? Thanks.
Replies
  • Re: hi, - Milton Plasencia - 2020-10-07 09:18:54
    • Re: hi, - Sam Tang - 2020-10-07 16:40:58
      • Re: hi, - Sam Tang - 2020-10-07 16:47:38
      • Re: hi, - Geo . - 2020-10-07 20:15:30
        • Re: hi, - Sam Tang - 2020-10-07 17:59:55
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