A forum for SAC users to exchange ideas and ask questions about SAC usage, installation, portability, etc.
This list has moved to https://groups.google.com/a/earthscope.org/g/sac-community.
- Email address
- sac-help@lists.ds.iris.edu
- Type
-
Help
Help lists are for submitting support questions. Anyone can post a question for NSF SAGE (or another team) to answer.
- Moderated by
- IRIS Webmaster
- Related tags
- SAC Software SAC
November
October
September
August
July
June
May
April
March
February
January
October
September
August
July
June
May
April
March
February
January
December
November
October
September (1)
August
July
June (4)
May (11)
April (3)
March (5)
February (2)
January (8)
November
October
September (1)
August
July
June (4)
May (11)
April (3)
March (5)
February (2)
January (8)
Active Message Threads for January 2020
Dear All,
I would like to calculate the noise spectrum of seismic waveform (waveform length of 5 s : 2.5 s pre- and post- of P-phase). I tried it in sac, however, I did not get it. Kindly suggest me the procedure for calculating the noise spectrum.
thanking you
Kanna
Replies
-
Re: Noise spectrum of seismic waveform - Geo . - 2020-01-24 09:48:42
Dear all,
I have converted my miniseed data using mseed2sac software and in the
generated SAC file I unable to change KZTIME nor able to mark any phase
using Taup_p software.
I am attaching one SAC file.
Thank you very much in advance.
regards,
Anupam
Replies
-
Re: unable to change KZTIME in SAC - Geo . - 2020-01-14 09:37:09
Dear all, I am using sac since about 2 months and need help in writing events parameters into sac headers as the following details:
I have more than 400 events as sac files, and a text file containing events parameters" evla, evlo, evdp, mag" . I am trying to find a macro or shell script in any language to read these parameters from file and insert them in sac file's header.
I prepare all sac files with names like " 1.sac, 2.sac, ..." and the same in text file data "line1: contains event numb…
[more]
Replies
-
Re: write headers from metadata - Mohammad Youssof - 2020-01-09 02:52:24
-
Re: write headers from metadata - Mohammad Youssof - 2020-01-09 23:33:03
-
Re: write headers from metadata - Waddah Mahmoud - 2020-01-11 19:29:29
-
-
Hi SAC users,
I have a somewhat stupid question about integration in SAC.
SAC provides two methods to do integration: time-domain (int) and
frequency-domain (divomega).
"int" uses the trapezoidal method and the first data point in the
integrated time-series is assumed to be zero.
"divomega" uses the Fourier transform properties integral=IFFT[ FFT[ x(t )]
/ i w ], in which w is angular frequency and x(t) is time series. Is this
method making any assumptions ? What happens at the first frequency …
[more]
Replies
-
Re: question on integration - George Helffrich - 2020-01-10 18:21:17
Nasir,
I am forwarding your message to the sac-help listserv, as there are people on that listserv who are better able to answer your question than I.
Arthur
> Begin forwarded message:
>
> From: nasir mahmood <earthq5@yahoo.com>
> Subject: Dear Sir
> Date: January 9, 2020 at 12:54:23 PM EST
> To: snoke@vt.edu
> Reply-To: earthq5@yahoo.com
>
> Dear Sir
> hope you will be fine and with good health. Understand you are a busy researcher.
>
> There is an earthquake of Mw 6.4. The station clo…
[more]
No replies
I have downloaded data in PASSCAL SEGY format, one file per channel. However, when I try to read in one of the files with the command 'read SEGY {filename}, , I receive an error message "ERROR 1340: data points outside allowed range contained in file {file name}". What does this mean and how do I read this data in?
Douglas R. Baumgardt
________________________________
The information contained in this email message is intended only for the use of the individual(s) to whom it is addressed an…
[more]
Replies
-
Re: SAC Read SEGY - Robert Casey - 2014-05-06 15:38:51
-
Re: SAC Read SEGY - Brian Savage - 2014-05-06 19:31:02
-
Re: SAC Read SEGY - wenai.oc@gmail.com - 2018-03-22 13:31:09
-
Re: SAC Read SEGY - Tong Bai - 2020-01-09 06:52:54
-
Re: SAC Read SEGY - Robert Casey - 2020-01-09 10:51:14
-
Re: SAC Read SEGY - Joshua Jones - 2020-01-09 12:10:35
-
-
-