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 November 2012

Jorge Morales
2012-11-23 16:48:48
Dear SAC users I would like to know if SAC software can create synthetic seismograms (such as Shake Movie Global from Princeton University). I am interested in performing some tests with software that manage data from a seismic array. So, what I need is seismograms from very close stations (100-500 meters) and epicenter distances around 50 km. Best regards Jorge Morales
No replies
Sunil .
2012-11-22 23:43:32
Dear SAC user's, I am getting a warning message while read the sac file as "sac-seismgr: Waveform-id already exists in memory". How to remove this warning message. Thanking you, Sonu
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Megan Torpey
2012-11-20 15:45:48
Hi Justin - I have been working with spectrogram a lot lately and I do not think you can zoom in/out with spectrogram like you can with ppk. Instead, you have to cut your input seismogram for the desired time range and run it through spectrogram on its own. Hope this helps! Megan Envoyé de mon iPhone Le Nov 20, 2012 à 1:20 AM, George Helffrich <> a écrit : > Dear All - > > To display only a portion of the spectrogram, use the XYZ option and then display t… [more]
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Justin Wood
2012-11-20 04:26:39 - 2012-11-20 14:20:09
Hello all, I just want to make the request from my previous email more clear. I would like to know how to change the time range (on the x-axis) of the spectrogram, not the frequency range. Thanks again Justin On Mon, Nov 19, 2012 at 6:18 PM, Milton Plasencia <>wrote: > > Hi Justin, > > You can to change the frequency range using YMAX variable. > see spectrogram help. > > HTH, > > Milton > > > * * * * * * * * * * * * * * * * * * * * * * * > Milton P. PLASENCIA LINARES > … [more]
Justin Wood
2012-11-20 01:31:56
Hello all, Is there a way to zoom in on a SAC spectrogram as you would for a seismogram? That is, can you zoom into a specified time window on a spectrogram. I've tried using the xlim command, but it only changes the time window on the seismogram and not the spectrogram. Any help would be appreciated. Thank you, Justin
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Alex Ganiev via LinkedIn
2012-11-08 07:31:55
LinkedIn ------------ Alex Ganiev requested to add you as a connection on LinkedIn: ------------------------------------------ Sac Help, I'd like to add you to my professional network on LinkedIn. - Alex Accept invitation from Alex Ganiev… [more]
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Amr El-Sharkawy
2012-11-07 18:15:02
Thanks a lot, I fond that software and it working good now Best Regards amr   Amr El-Sharkawy Seismologist, National Research Institute of Astronomy and Geophysics, (NRIAG), Egypt. e-mail: >________________________________ > From: Milton Plasencia <> >To: Amr El-Sharkawy <> >Cc: >Sent: Wednesday, November 7, 2012 8:03 PM >Subject: Re: [SAC-HELP] convert sac to seed > > > > >Hi, >Yo… [more]
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Amr El-Sharkawy
2012-11-07 13:49:10
Dears sac users how are you, Please my professor can you tell me how to convert SAC data, which i request and extract it from CTBTO stations, in to seed format. or if possible how to convert sac data (which converted to sac from other format under linux operating system) to sac PC. I am waiting your kind reply. the data which I want to convert it from sac to seed or Y-format or miniseed, I got it from CTBTO. but my problem is how to convert it from sac. With all respect and appreciation amr… [more]
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