Thread: JSO

Started: 2021-11-16 21:35:58
Last activity: 2021-11-17 18:20:44
Topics: SAC Help
Ali Solihat
JSO
2021-11-16 21:35:58
How to the get the value of PGA from the seismic wave after integrated the trace

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  • Nasir Mahmood
    Re: JSO
    2021-11-17 05:47:49
    I think if u are using velocity seismogram, then need to first remove instrument response, of the trace with rtr, mean and then need to differentiate instead integrate to obtain results in acceleration units.
    Nasir
    On Wednesday, November 17, 2021, 06:14:27 AM GMT+5, Ali Solihat (via IRIS) <sac-help-bounce<at>lists.ds.iris.edu> wrote:

    How to the get the value of PGA from the seismic wave after integrated the trace
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    • Ali Solihat
      Re: JSO
      2021-11-17 06:53:29
      Dear Nasir,

      Many thanks for your reply.

      sorry I have to differentiate to get the acceleration if we have velocity waveform.

      My question how to get the value of PGA as written number instead of having it from the trace .


      Best Regard,

      Ali Solihat
      Senior System Engineer
      Jordan Seismological Observatory
      Ministry of Energy and Mineral Resources
      asolihat<at>memr.gov.jo
      abbadi_ali<at>yahoo.com
      Mobile Number:+ 962 799 741 646


      ________________________________
      From: sac-help-bounce<at>lists.ds.iris.edu <sac-help-bounce<at>lists.ds.iris.edu> on behalf of Nasir Mahmood (via IRIS) <sac-help-bounce<at>lists.ds.iris.edu>
      Sent: Wednesday, November 17, 2021 7:48 AM
      To: SAC Help
      Subject: Re: [IRIS][sac-help] JSO

      I think if u are using velocity seismogram, then need to first remove instrument response, of the trace with rtr, mean and then need to differentiate instead integrate to obtain results in acceleration units.
      Nasir
      On Wednesday, November 17, 2021, 06:14:27 AM GMT+5, Ali Solihat (via IRIS) <sac-help-bounce<at>lists.ds.iris.edu> wrote:


      How to the get the value of PGA from the seismic wave after integrated the trace

      Get Outlook for Androidhttps://aka.ms/AAb9ysg
      ________________________________
      [http://pm.gov.jo/100-Anni-Alpha.png]

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      • Geo .
        Re: JSO
        2021-11-17 18:20:44
        Hi Ali,
        If your seismogram is already an accelerogram and it contains the PGA, you
        can simply do the following:

        SAC> READ my_accelerogram.SAC

        SAC> SETBB myPGA (MAX (ABSOLUTE &1,DEPMAX) (ABSOLUTE &1,DEPMIN))

        SAC> MESSAGE "PGA= %myPGA"

        Januka

        Januka Attanayake
        Research Fellow/Lecturer | Earthquake Seismology Lead
        Homepage: *https://sites.google.com/site/janukaattanayake
        https://sites.google.com/site/janukaattanayake*

        School of Geography, Earth & Atmospheric Sciences
        University of Melbourne | Parkville 3010 VIC
        Australia




        On Wed, 17 Nov 2021 at 17:58, Ali Solihat (via IRIS) <
        sac-help-bounce<at>lists.ds.iris.edu> wrote:

        Dear Nasir,

        Many thanks for your reply.

        sorry I have to differentiate to get the acceleration if we have velocity
        waveform.

        My question how to get the value of PGA as written number instead of
        having it from the trace .


        Best Regard,
        Ali Solihat
        Senior System Engineer
        Jordan Seismological Observatory
        Ministry of Energy and Mineral Resources
        asolihat<at>memr.gov.jo
        abbadi_ali<at>yahoo.com
        Mobile Number:+ 962 799 741 646


        ------------------------------
        *From:* sac-help-bounce<at>lists.ds.iris.edu <
        sac-help-bounce<at>lists.ds.iris.edu> on behalf of Nasir Mahmood (via IRIS) <
        sac-help-bounce<at>lists.ds.iris.edu>
        *Sent:* Wednesday, November 17, 2021 7:48 AM
        *To:* SAC Help
        *Subject:* Re: [IRIS][sac-help] JSO

        I think if u are using velocity seismogram, then need to first remove
        instrument response, of the trace with rtr, mean and then need to
        differentiate instead integrate to obtain results in acceleration units.
        Nasir
        On Wednesday, November 17, 2021, 06:14:27 AM GMT+5, Ali Solihat (via IRIS)
        <sac-help-bounce<at>lists.ds.iris.edu> wrote:


        How to the get the value of PGA from the seismic wave after integrated the
        trace

        Get Outlook for Android https://aka.ms/AAb9ysg
        ------------------------------


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        • Ali Solihat
          Re: JSO
          2021-11-17 07:26:45
          Dear Januka,


          Many thanks 😊


          Best Rageds,

          Ali Solihat
          Senior System Engineer
          Jordan Seismological Observatory
          Ministry of Energy and Mineral Resources
          asolihat<at>memr.gov.jo
          abbadi_ali<at>yahoo.com
          Mobile Number:+ 962 799 741 646


          ________________________________
          From: Januka Attanayake <jattanayake<at>gmail.com>
          Sent: Wednesday, November 17, 2021 9:20 AM
          To: Ali Solihat; sac-help<at>lists.ds.iris.edu
          Subject: Re: [IRIS][sac-help] JSO

          Hi Ali,
          If your seismogram is already an accelerogram and it contains the PGA, you can simply do the following:


          SAC> READ my_accelerogram.SAC

          SAC> SETBB myPGA (MAX (ABSOLUTE &1,DEPMAX) (ABSOLUTE &1,DEPMIN))

          SAC> MESSAGE "PGA= %myPGA"

          Januka

          Januka Attanayake
          Research Fellow/Lecturer | Earthquake Seismology Lead
          Homepage: https://sites.google.com/site/janukaattanayake

          School of Geography, Earth & Atmospheric Sciences
          University of Melbourne | Parkville 3010 VIC
          Australia

          [https://docs.google.com/uc?export=download&id=18UprUc6tr2T7pShyWEVxhJNmiEGEFySy&revid=0B2dyBa1wSDlRV3Z5a1Z4UEl5WHhHaExLc1M4S0s1blFLc3RrPQ]



          On Wed, 17 Nov 2021 at 17:58, Ali Solihat (via IRIS) <sac-help-bounce<at>lists.ds.iris.edu<sac-help-bounce<at>lists.ds.iris.edu>> wrote:

          Dear Nasir,

          Many thanks for your reply.

          sorry I have to differentiate to get the acceleration if we have velocity waveform.

          My question how to get the value of PGA as written number instead of having it from the trace .


          Best Regard,

          Ali Solihat
          Senior System Engineer
          Jordan Seismological Observatory
          Ministry of Energy and Mineral Resources
          asolihat<at>memr.gov.jo<asolihat<at>memr.gov.jo>
          abbadi_ali<at>yahoo.com<abbadi_ali<at>yahoo.com>
          Mobile Number:+ 962 799 741 646


          ________________________________
          From: sac-help-bounce<at>lists.ds.iris.edu<sac-help-bounce<at>lists.ds.iris.edu> <sac-help-bounce<at>lists.ds.iris.edu<sac-help-bounce<at>lists.ds.iris.edu>> on behalf of Nasir Mahmood (via IRIS) <sac-help-bounce<at>lists.ds.iris.edu<sac-help-bounce<at>lists.ds.iris.edu>>
          Sent: Wednesday, November 17, 2021 7:48 AM
          To: SAC Help
          Subject: Re: [IRIS][sac-help] JSO

          I think if u are using velocity seismogram, then need to first remove instrument response, of the trace with rtr, mean and then need to differentiate instead integrate to obtain results in acceleration units.
          Nasir
          On Wednesday, November 17, 2021, 06:14:27 AM GMT+5, Ali Solihat (via IRIS) <sac-help-bounce<at>lists.ds.iris.edu<sac-help-bounce<at>lists.ds.iris.edu>> wrote:


          How to the get the value of PGA from the seismic wave after integrated the trace

          Get Outlook for Androidhttps://aka.ms/AAb9ysg
          ________________________________
          [http://pm.gov.jo/100-Anni-Alpha.png]

          ----------------------
          SAC Help
          Topic home: http://ds.iris.edu/message-center/topic/sac-help/ | Unsubscribe: sac-help-unsubscribe<at>lists.ds.iris.edu<sac-help-unsubscribe<at>lists.ds.iris.edu>

          Sent from the IRIS Message Center (http://ds.iris.edu/message-center/)
          Update subscription preferences at http://ds.iris.edu/account/profile/

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