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Active Message Threads for January 2023
Sushrat Mishra
Respected Sir,
I have a query regarding the "Scale" header in SAC file.I have searched in
SAC manual but haven't got any clue. I am trying to convert the counts (raw
unit of seismogram) into some earth units(e.g. acceleration/velocity)
...For this exact factor is required.
I have gone through this link of IRIS
https://ds.iris.edu/ds/support/faq/6/what-is-a-count-in-timeseries-data/ &
found that its written, $SCALE=1m/s. I did the same thing with few
earthquake data recorded in "KATNP" station…
[more]
Replies
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Re: Regarding "Scale" header in SAC (urgent) - George Helffrich - 2023-01-26 17:45:09
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Re: Regarding "Scale" header in SAC (urgent) - Geo . - 2023-01-27 07:13:32
アングライニノビア
Good Afternoon
My SAC data is in UT and I need to change it to GMT+4.
At first, I used the chnhdr+wh command, but it only changed the header, as
its name suggests, but when I plotted the data, the X axis started from
-14400, 4*3600.
Is there any other way to shift the time reference of SAC data, so that
when I plot it the data will start from 0 s?
I really appreciate any help you can provide
Replies
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Re: Shifting Reference Time - George Helffrich - 2023-01-26 17:53:03
jamie.farrell@utah.edu
I have a bunch picks that are recorded in the sac header as AMARKER and T0. I can use saclst to pull out the pick times but I want to also pull out the metadata such as the phase, weight, etc. (i.e. IUP0). I can’t seem to do this using saclst. Does anyone have a way to pull this information out of the sac header?
Thanks,
------------------------------------------
Jamie Farrell
Research Assistant Professor
Seismograph Stations
Dept. of Geology & Geophysics
University of Utah
115 S…
[more]
Replies
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Re: recording AMARKER information - George Helffrich - 2023-01-11 20:12:41
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Re: recording AMARKER information - jamie.farrell@utah.edu - 2023-01-11 20:21:26
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