Thread: CMLA AZIMUTH problem

Started: 2021-03-24 12:42:04
Last activity: 2021-03-31 11:57:21
João Fontiela
2021-03-24 12:42:04

Dear all,


I downloaded data covering a large time span from II.CMLA.00, that goes though several different instruments. I found that the azimuth in SAC header of the station installed in 2019-06-07T00:00:00 (158) (Streckeisen STS-6 Seismometer) is 355.3º while azimuth in the Metadata Agregator is 300º.
Azimuth 355.3º belongs to the Geotech KS-54000 Borehole Seismometer that was operating between 2010-03-28T00:00:00 (087) - 2016-09-02T23:59:59 (246) and 2016-09-03T00:00:00 (247) - 2019-03-26T23:59:59 (085).

I wonder know what is the correct azimuth to II.CMLA.00 with Streckeisen STS-6 Seismometer.

Yours,
João Fontiela



*********************
*********************
João Fontiela, Ph.D
skype: fontiela
email: fontiela<at>gmail.com
mobile phone +351 917 862 830

Professional contacts:
email: jfontiela<at>uevora.pt
Tel: (+351) 266 745 372 ext: 25411
Fax: (+351) 266 745 394

Professional address:
Universidade de Évora
Instituto de Ciências da Terra
Colégio Luís Verney
Rua Romão Ramalho, 59
7000-671 Évora - Portugal

ResearchGate: https://www.researchgate.net/profile/Joao_Fontiela


  • Adam Clark
    2021-03-30 10:01:07
    Hello João,

    Apologies for the slow reply. As far as I can tell, the MDA version is correct -- the azimuth of this instrument appears to be 300°. It sounds like the data you downloaded shows a different value -- could you provide more information about how/where you got this downloaded data?

    Thanks!
    Adam


    ----------------------
    Adam Clark
    Web Developer / Admin
    IRIS Data Management Center
    adam<at>iris.washington.edu



    On Mar 30, 2021, at 9:39 AM, João Fontiela (via IRIS) @ds.iris.edu <data-proces.sing-help-bounce<at>lists.ds.iris.edu> wrote:


    Dear all,


    I downloaded data covering a large time span from II.CMLA.00, that goes though several different instruments. I found that the azimuth in SAC header of the station installed in 2019-06-07T00:00:00 (158) (Streckeisen STS-6 Seismometer) is 355.3º while azimuth in the Metadata Agregator is 300º.
    Azimuth 355.3º belongs to the Geotech KS-54000 Borehole Seismometer that was operating between 2010-03-28T00:00:00 (087) - 2016-09-02T23:59:59 (246) and 2016-09-03T00:00:00 (247) - 2019-03-26T23:59:59 (085).

    I wonder know what is the correct azimuth to II.CMLA.00 with Streckeisen STS-6 Seismometer.

    Yours,
    João Fontiela



    *********************
    *********************
    João Fontiela, Ph.D
    skype: fontiela
    email: fontiela<at>gmail.com <fontiela<at>gmail.com>
    mobile phone +351 917 862 830

    Professional contacts:
    email: jfontiela<at>uevora.pt
    Tel: (+351) 266 745 372 ext: 25411
    Fax: (+351) 266 745 394

    Professional address:
    Universidade de Évora
    Instituto de Ciências da Terra
    Colégio Luís Verney
    Rua Romão Ramalho, 59
    7000-671 Évora - Portugal

    ResearchGate: https://www.researchgate.net/profile/Joao_Fontiela


    ----------------------
    Data Processing Help
    Topic home: http://ds.iris.edu/message-center/topic/data-processing-help/ | Unsubscribe: data-processing-help-unsubscribe<at>lists.ds.iris.edu

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    • João Fontiela
      2021-03-31 11:57:21
      Dear Adam,

      I downloaded data from IRIS using pyweed on February 15, 2021. The following lines are the SAC header (BH1 and BH2) of one event that I took from the bundle I downloaded:
      FILE: II.CMLA.00.BH1_2020-01-24T18_03_08.225_2020-01-24T18_14_08.225.sac - 1
      ------------------------------------------------------------------------

      NPTS = 26400
      B = 4.742395e+02
      E = 1.134215e+03
      IFTYPE = TIME SERIES FILE
      LEVEN = TRUE
      DELTA = 2.500000e-02
      DEPMIN = -2.054200e+04
      DEPMAX = 2.236800e+04
      DEPMEN = 1.098332e+02
      OMARKER = 0.00015796
      KZDATE = JAN 24 (024), 2020
      KZTIME = 17:55:14.005
      IZTYPE = EVENT ORIGIN TIME
      KINST = Geotech
      KSTNM = CMLA
      CMPAZ = 3.553000e+02
      CMPINC = 9.000000e+01
      STLA = 3.776370e+01
      STLO = -2.552430e+01
      STEL = 4.290000e+02
      STDP = 9.700000e+01
      KEVNM = Turkey
      EVLA = 3.838970e+01
      EVLO = 3.908830e+01
      EVDP = 1.000000e+01
      KHOLE = 00
      LOVROK = TRUE
      NVHDR = 6
      SCALE = 1.000000e+00
      LPSPOL = TRUE
      LCALDA = FALSE
      KCMPNM = BH1
      KNETWK = II
      MAG = 6.700000e+00

      FILE: II.CMLA.00.BH2_2020-01-24T18_03_08.225_2020-01-24T18_14_08.225.sac - 1
      ------------------------------------------------------------------------

      NPTS = 26400
      B = 4.742395e+02
      E = 1.134215e+03
      IFTYPE = TIME SERIES FILE
      LEVEN = TRUE
      DELTA = 2.500000e-02
      DEPMIN = -2.720200e+04
      DEPMAX = 3.439800e+04
      DEPMEN = 9.844534e+02
      OMARKER = 0.00015796
      KZDATE = JAN 24 (024), 2020
      KZTIME = 17:55:14.005
      IZTYPE = EVENT ORIGIN TIME
      KINST = Geotech
      KSTNM = CMLA
      CMPAZ = 8.530000e+01
      CMPINC = 9.000000e+01
      STLA = 3.776370e+01
      STLO = -2.552430e+01
      STEL = 4.290000e+02
      STDP = 9.700000e+01
      KEVNM = Turkey
      EVLA = 3.838970e+01
      EVLO = 3.908830e+01
      EVDP = 1.000000e+01
      KHOLE = 00
      LOVROK = TRUE
      NVHDR = 6
      SCALE = 1.000000e+00
      LPSPOL = TRUE
      LCALDA = FALSE
      KCMPNM = BH2
      KNETWK = II
      MAG = 6.700000e+00

      Yours,
      João Fontiela


      *********************
      *********************
      João Fontiela, Ph.D
      skype: fontiela
      email: fontiela<at>gmail.com
      mobile phone +351 917 862 830

      Professional contacts:
      email: jfontiela<at>uevora.pt
      Tel: (+351) 266 745 372 ext: 25411
      Fax: (+351) 266 745 394

      Professional address:
      Universidade de Évora
      Instituto de Ciências da Terra
      Colégio Luís Verney
      Rua Romão Ramalho, 59
      7000-671 Évora - Portugal

      ResearchGate: https://www.researchgate.net/profile/Joao_Fontiela

      No dia 30/03/2021, às 18:01, Adam Clark <adam<at>iris.washington.edu> escreveu:

      Hello João,

      Apologies for the slow reply. As far as I can tell, the MDA version is correct -- the azimuth of this instrument appears to be 300°. It sounds like the data you downloaded shows a different value -- could you provide more information about how/where you got this downloaded data?

      Thanks!
      Adam


      ----------------------
      Adam Clark
      Web Developer / Admin
      IRIS Data Management Center
      adam<at>iris.washington.edu <adam<at>iris.washington.edu>



      On Mar 30, 2021, at 9:39 AM, João Fontiela (via IRIS) @ds.iris.edu <data-proces.sing-help-bounce<at>lists.ds.iris.edu <data-proces.sing-help-bounce<at>lists.ds.iris.edu>> wrote:


      Dear all,


      I downloaded data covering a large time span from II.CMLA.00, that goes though several different instruments. I found that the azimuth in SAC header of the station installed in 2019-06-07T00:00:00 (158) (Streckeisen STS-6 Seismometer) is 355.3º while azimuth in the Metadata Agregator is 300º.
      Azimuth 355.3º belongs to the Geotech KS-54000 Borehole Seismometer that was operating between 2010-03-28T00:00:00 (087) - 2016-09-02T23:59:59 (246) and 2016-09-03T00:00:00 (247) - 2019-03-26T23:59:59 (085).

      I wonder know what is the correct azimuth to II.CMLA.00 with Streckeisen STS-6 Seismometer.

      Yours,
      João Fontiela



      *********************
      *********************
      João Fontiela, Ph.D
      skype: fontiela
      email: fontiela<at>gmail.com <fontiela<at>gmail.com>
      mobile phone +351 917 862 830

      Professional contacts:
      email: jfontiela<at>uevora.pt <jfontiela<at>uevora.pt>
      Tel: (+351) 266 745 372 ext: 25411
      Fax: (+351) 266 745 394

      Professional address:
      Universidade de Évora
      Instituto de Ciências da Terra
      Colégio Luís Verney
      Rua Romão Ramalho, 59
      7000-671 Évora - Portugal

      ResearchGate: https://www.researchgate.net/profile/Joao_Fontiela


      ----------------------
      Data Processing Help
      Topic home: http://ds.iris.edu/message-center/topic/data-processing-help/ | Unsubscribe: data-processing-help-unsubscribe<at>lists.ds.iris.edu <data-processing-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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