Thread: S wave picking

Started: 2018-05-29 04:56:33
Last activity: 2018-05-31 05:25:49
Topics: SAC Help
Mario La Rocca
2018-05-29 04:56:33
dear sac experts, I have a problem with the picking of S phase in sac. I
follow this procedure to save pickings:
1) r filename.*.sac
2) ohpf pickings.txt
3) ppk p 3 bell off
then I type 'p' and then 'h' at the P wave arrival time, and it works fine
because the pickings.txt file will contain a row in the correct format for
that station (after the file has been closed by chpf).
However, if I type 's' and then 'h' for the S wave arrival time, it does
not work. In fact in the pickings.txt file I find an empty row filled with
1000 blank instead of the expected string.

I am working with sac 2013, version 101.6a on linux debian. I tried also
sac2000, 2005 and 2009, even on ubuntu, but I could never obtain a correct
picking of the S wave.

Can anyone help me? Am I doing something wrong? thank you very much.


--
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Mario La Rocca
Professore Associato di Geofisica
Universita' della Calabria - Cosenza
e-mail: mario.larocca<at>unical.it
tel: +39 0984 493567; 0984 493666
--------------------------------------------------

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  • Milton Plasencia
    2018-05-30 01:50:36
    Dear Mario,

    The second command should be:
    sac>oapf picking.txt. # this command open a picking file instead ohpf
    that open hypo file.
    sac> ppk .....
    here, see the manual to understand the plotpktable commands
    sac> help plotpktable
    to do pickings, when you finish close with Q the ppk instance
    sac> capf picking.txt. # close the picking.txt file
    and you should to find your pickings in the file.

    HTH,

    M.





    ************************************
    Milton P. PLASENCIA LINARES

    Centro di Ricerche Sismologiche (CRS)
    OGS - Istituto Nazionale di Oceanografia e di Geofisica Sperimentale

    Borgo Grotta Gigante 42/C
    (34010) Sgonico - Trieste - Italia
    Tel: +39 040 2140 156 (Udine)
    Tel: +39 040 2140 256 (Trieste)
    Cel.: +39 331 6481 935

    E-mail: mplasencia<at>inogs.it

    GPG Key: 22FCFFA8

    ASAIN (Antarctic Seismographic Argentinean Italian Network)
    **************************************

    On 29 May 2018 at 18:08, Mario La Rocca <mario.larocca<at>unical.it> wrote:

    dear sac experts, I have a problem with the picking of S phase in sac. I
    follow this procedure to save pickings:
    1) r filename.*.sac
    2) ohpf pickings.txt
    3) ppk p 3 bell off
    then I type 'p' and then 'h' at the P wave arrival time, and it works fine
    because the pickings.txt file will contain a row in the correct format for
    that station (after the file has been closed by chpf).
    However, if I type 's' and then 'h' for the S wave arrival time, it does
    not work. In fact in the pickings.txt file I find an empty row filled with
    1000 blank instead of the expected string.

    I am working with sac 2013, version 101.6a on linux debian. I tried also
    sac2000, 2005 and 2009, even on ubuntu, but I could never obtain a correct
    picking of the S wave.

    Can anyone help me? Am I doing something wrong? thank you very much.


    --
    --------------------------------------------------
    Mario La Rocca
    Professore Associato di Geofisica
    Universita' della Calabria - Cosenza
    e-mail: mario.larocca<at>unical.it
    tel: +39 0984 493567; 0984 493666
    --------------------------------------------------

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    • Mario La Rocca
      2018-05-30 21:51:55
      dear Milton,
      I tried the alternative procedure you suggested and it seems to work
      fine, so my problem seems to be solved. thank you very much for your help.
      sincerely,

      Mario

      2018-05-29 18:50 GMT+02:00 Milton Plasencia <mplasencia<at>inogs.it>:

      Dear Mario,

      The second command should be:
      sac>oapf picking.txt. # this command open a picking file instead ohpf
      that open hypo file.
      sac> ppk .....
      here, see the manual to understand the plotpktable commands
      sac> help plotpktable
      to do pickings, when you finish close with Q the ppk instance
      sac> capf picking.txt. # close the picking.txt file
      and you should to find your pickings in the file.

      HTH,

      M.





      ************************************
      Milton P. PLASENCIA LINARES

      Centro di Ricerche Sismologiche (CRS)
      OGS - Istituto Nazionale di Oceanografia e di Geofisica Sperimentale

      Borgo Grotta Gigante 42
      <https://maps.google.com/?q=Borgo+Grotta+Gigante+42&entry=gmail&source=g>
      /C
      (34010) Sgonico - Trieste - Italia
      Tel: +39 040 2140 156 (Udine)
      Tel: +39 040 2140 256 (Trieste)
      Cel.: +39 331 6481 935

      E-mail: mplasencia<at>inogs.it

      GPG Key: 22FCFFA8

      ASAIN (Antarctic Seismographic Argentinean Italian Network)
      **************************************

      On 29 May 2018 at 18:08, Mario La Rocca <mario.larocca<at>unical.it> wrote:

      dear sac experts, I have a problem with the picking of S phase in sac. I
      follow this procedure to save pickings:
      1) r filename.*.sac
      2) ohpf pickings.txt
      3) ppk p 3 bell off
      then I type 'p' and then 'h' at the P wave arrival time, and it works
      fine because the pickings.txt file will contain a row in the correct format
      for that station (after the file has been closed by chpf).
      However, if I type 's' and then 'h' for the S wave arrival time, it does
      not work. In fact in the pickings.txt file I find an empty row filled with
      1000 blank instead of the expected string.

      I am working with sac 2013, version 101.6a on linux debian. I tried also
      sac2000, 2005 and 2009, even on ubuntu, but I could never obtain a correct
      picking of the S wave.

      Can anyone help me? Am I doing something wrong? thank you very much.


      --
      --------------------------------------------------
      Mario La Rocca
      Professore Associato di Geofisica
      Universita' della Calabria - Cosenza
      e-mail: mario.larocca<at>unical.it
      tel: +39 0984 493567; 0984 493666
      --------------------------------------------------

      ------------------------------------------------------------
      ------------------------------------------------------
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      dell'Università della Calabria
      <http://www.unical.it/5x1000

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      --
      --------------------------------------------------
      Mario La Rocca
      Professore Associato di Geofisica
      Universita' della Calabria - Cosenza
      e-mail: mario.larocca<at>unical.it
      tel: +39 0984 493567; 0984 493666
      --------------------------------------------------

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      ------------------------------------------------------------------------------------------------------------------

      Il banner è generato automaticamente dal servizio di posta elettronica
      dell'Università della Calabria
      <http://www.unical.it/5x1000

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