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 June 2010

Megan Torpey
2010-06-21 22:00:55 - 2010-06-22 18:45:02
Hi, I'm having a SAC problem. I'm running a program to digitize paper seismograms. My digitization program saves the files I create as .SAC files. I got one digitized and saved it as .SAC but when I tried to read the file into SAC I got the following error: ERROR 1318: Header in disk file is out of date: myfile Header version number is incorrect. Header seems byte-swapped—byte-swap file and retry. I looked up sac help online and I got : [more]
  • Re: HELP! - Arthur Snoke - 2010-06-21 23:44:35
    • Re: HELP! - Brian Savage - 2010-06-22 18:45:02
  • Re: HELP! - Marcelo Bianchi - 2010-06-22 04:19:46
Mohit Agrawal
2010-06-22 16:15:16
Hello I am downloading the data for the GSN stations with the help of SOD but after looking at the seismogram , I noticed that I am getting variable length of seismogram. Can you please tell me "how can I solve this problem". Thanks Mohit
No replies
Arthur Snoke
2010-06-10 04:14:34
Version 101.4 of SAC is now available for download from URL <>. For a summary of the changes between this version and 101.3b (released August 2009), one can view the HISTORY file at <>. That file, as well as the more detailed CHANGES file, can also be accessed from the IRIS software/sac page. As before, there are binary distributions for Sun Solaris, Linux (32 bit and 64 bit) and Mac OS X. There are now two... [more]
No replies
Shahar Shani Kadmiel
2010-06-09 22:02:49
I am trying to compile a short c code using some subroutines from sacio.a I get this error: sacio.a: could not read symbols: Archive has no index; run ranlib to add one collect2: ld returned 1 exit status When I run ranlib, I get this: ranlib: sacio.a: Malformed archive I have a feeling this has to do with the fact I am using the sacio.a archive which is distributed with MacSAC and is not compatible with the linux machine I am compiling on. What to do?
Shahar Shani Kadmiel
2010-06-09 00:12:38 - 2010-06-09 17:36:11
I have written a short code in c utilizing the "wsac1" subroutine. When compiling, I get this: Undefined symbols: "_wsac1", referenced from: _main in cc7iJC76.o ld: symbol(s) not found collect2: ld returned 1 exit status This is the only problem and when I comment out the line containing wsac1 the program compiles with no errors. The part after _main, where it says "cc7iJC76.o", changes with every try. This is my compile line: cc codeName.c -o codeName -lm -m32 sacio.a where sac... [more]
Hi Brian, I am not sure you got my reply including the information you asked, so I forward it in this email. Also, I tried to substitute the sac bin version with the sac source version, but after the installation I still get the same error: bash-3.2$ make Masterprogram gfortran -m32 Masterprogram.o /usr/local/sac/lib/libsac.a /usr/local/sac/lib/sacio.a -o Masterprogram Undefined symbols: "_cmmem", referenced from: _cmmem$non_lazy_ptr in sacio.a(writevfile.o) _cmmem$non_lazy_... [more]
No replies
gaurav dutta
2010-06-05 23:18:31
Dear Sir, How to convert data which is in sac format into ascii format ?
Katie Boyle
2010-06-04 15:18:38 - 2010-06-04 20:55:29
Hi All, Every time I run SAC, it barfs this out (all I did for this example was type 'sac' and then immediately typed 'quit'): me@me-desktop:~$ sac SEISMIC ANALYSIS CODE [09/04/2008 (Version 101.2)] Copyright 1995 Regents of the University of California SAC> quit *** glibc detected *** sac: free(): invalid next size (fast): 0x09ba1178 *** ======= Backtrace: ========= /lib/tls/i686/cmov/[0xb7d06454] /lib/tls/i686/cmov/[0xb7d084b6] sac[0x81e5fc6] sac[0x81d82eb... [more]
Andreas Wuestefeld
2010-06-01 22:27:37 - 2010-06-03 12:59:23
Dear Isaac, Aldo I have lately had to install CYGWIN & SAC on several WIN7 computers, and I cannot reproduce the error. I assume you have a Win7 system with admin previliges, and use the latest release of CYGWIN (ver1.7.x)? Win7 has a rather strict permission policy, which sometimes results in files opened/upacked under windows are not accesible in cygwin. a "chmod" ususally helps I suggest that you unpack and untar the sac-101.3b-cygwin.tar.gz under cygwin and not Windows check manu... [more]
Dear All: When I try to picking phase arrival in plotpk window, I type ohpf to create a hypo file before phase picking. I can get correct P-phase arrival time after I typing "P" to decide the P-phase, however, I cannot get S-phase arrival time when I type "S" to decide the S-phase, the arrival time of S-phase reveals 0.0 both in the PPK window and in the hypo file. how can I resolve this problem? Thanks all for your help.
No replies
Jesse F Lawrence
2010-06-01 19:57:51
Hi, I am writing a set of subroutines to read in sac header information into the format I need for my program. On a unix machine I have no problems, but on linux I get the following error message: ERROR 1336: Undefined header field value. kuser0 I have filled this variable on my sac files. I can proceed despite the error, but it is not satisfying to have a bunch of error messages come up. Any suggestions? Any fixes? Any way to suppress the error message? Cheers, -Jesse ---... [more]
No replies
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