Thread: Problem with OMARKER time in sacfiles

Started: 2014-11-20 20:53:50
Last activity: 2014-11-21 17:20:51
Topics: SAC Help
Mohit Agrawal
2014-11-20 20:53:50
Hello all,

Some days ago I requested seed data using JWEED software and then used
rdseed to extract SAC files. I also used summary file to put event
information into sac headers while extracting the sac files from seed using
rdseed, I am using rdseed 5.3.1. But it seems to me that OMARKER time in
these headers is not at right place. To give you an example.

SAC> lh


FILE: 2010.365.16.38.09.0150.XR.SC04..BHZ.M.SAC - 2
-----------------------------------------------

NPTS = 60400
B = 0.000000e+00
E = 1.509975e+03
IFTYPE = TIME SERIES FILE
LEVEN = TRUE
DELTA = 2.500000e-02
IDEP = UNKNOWN
DEPMIN = -8.250000e+02
DEPMAX = 1.571000e+03
DEPMEN = 3.371272e+02
OMARKER = -2.859e+07
KZDATE = DEC 31 (365), 2010
KZTIME = 16:38:09.015
KSTNM = SC04
CMPAZ = 0.000000e+00
CMPINC = 0.000000e+00
STLA = 3.452280e+01
STLO = -1.058119e+02
STEL = 1.944000e+03
STDP = 0.000000e+00
EVLA = 7.018000e-01
EVLO = -2.611270e+01
EVDP = 1.400000e+01
KHOLE =
DIST = 9.024891e+03
AZ = 3.046907e+02
BAZ = 9.527464e+01
GCARC = 8.111243e+01
LOVROK = TRUE
NVHDR = 6
NORID = 0
NEVID = 0
LPSPOL = FALSE
LCALDA = TRUE
KCMPNM = BHZ
KNETWK = XR
MAG = 5.500000e+00


Here OMARKER is the order of 10e+7, which is huge around 330 days and
certainly not right. Likewise, in all other files too the OMARKER is set at
very high value though the beginning time in all the traces is zero. Here
is the summary file corresponding to this event.

EVENT: 2010-12-31 16:30:55.3600,0.7018,-26.1127,14,MW,5.5
STATION: SC04 XR 34.5228 -105.8119
PHASE: P -300 S 600 "BHE,BHZ,BHN" "--" 2010,365,16:43:09.0
2010,365,16:53:19.0 iasp91

Please let me know what should I do to correct this.

Thanks

--






*Mohit AgrawalPhD Candidate | Research Assistant | Geophysics
(Computational Seismology)Dept. of Geology | Baylor University Geophysics
Lab, E453R | Baylor University Sciences Building (BSB) | Office:
E454R,BSB.Phone- 254-710-2172 ( lab), 254-710-2155(office),
281-460-8941(Personal)Email : mohit_agrawal<at>baylor.edu
<mohit_agrawal<at>baylor.edu>, ism21.mohit<at>gmail.com
<ism21.mohit<at>gmail.com>Home Address : Apt # 207, 1500 s, 9th street, 76706,
Waco, Texas, USA.*

  • Mehdi Qashqai
    2014-11-21 17:20:51
    Use SOD instead of jweed and rdseed. It will do all the processes and is
    able to put t0 and will give you sac file.
    http://www.seis.sc.edu/sod/
    I will send you an example of script in 1 or 2 hour. Now i am not in the
    office.
    On 21/11/2014 6:09 AM, "mohit agrawal" <ism21.mohit<at>gmail.com> wrote:

    Hello all,

    Some days ago I requested seed data using JWEED software and then used
    rdseed to extract SAC files. I also used summary file to put event
    information into sac headers while extracting the sac files from seed using
    rdseed, I am using rdseed 5.3.1. But it seems to me that OMARKER time in
    these headers is not at right place. To give you an example.

    SAC> lh


    FILE: 2010.365.16.38.09.0150.XR.SC04..BHZ.M.SAC - 2
    -----------------------------------------------

    NPTS = 60400
    B = 0.000000e+00
    E = 1.509975e+03
    IFTYPE = TIME SERIES FILE
    LEVEN = TRUE
    DELTA = 2.500000e-02
    IDEP = UNKNOWN
    DEPMIN = -8.250000e+02
    DEPMAX = 1.571000e+03
    DEPMEN = 3.371272e+02
    OMARKER = -2.859e+07
    KZDATE = DEC 31 (365), 2010
    KZTIME = 16:38:09.015
    KSTNM = SC04
    CMPAZ = 0.000000e+00
    CMPINC = 0.000000e+00
    STLA = 3.452280e+01
    STLO = -1.058119e+02
    STEL = 1.944000e+03
    STDP = 0.000000e+00
    EVLA = 7.018000e-01
    EVLO = -2.611270e+01
    EVDP = 1.400000e+01
    KHOLE =
    DIST = 9.024891e+03
    AZ = 3.046907e+02
    BAZ = 9.527464e+01
    GCARC = 8.111243e+01
    LOVROK = TRUE
    NVHDR = 6
    NORID = 0
    NEVID = 0
    LPSPOL = FALSE
    LCALDA = TRUE
    KCMPNM = BHZ
    KNETWK = XR
    MAG = 5.500000e+00


    Here OMARKER is the order of 10e+7, which is huge around 330 days and
    certainly not right. Likewise, in all other files too the OMARKER is set at
    very high value though the beginning time in all the traces is zero. Here
    is the summary file corresponding to this event.

    EVENT: 2010-12-31 16:30:55.3600,0.7018,-26.1127,14,MW,5.5
    STATION: SC04 XR 34.5228 -105.8119
    PHASE: P -300 S 600 "BHE,BHZ,BHN" "--"
    2010,365,16:43:09.0 2010,365,16:53:19.0 iasp91

    Please let me know what should I do to correct this.

    Thanks

    --






    *Mohit AgrawalPhD Candidate | Research Assistant | Geophysics
    (Computational Seismology)Dept. of Geology | Baylor University Geophysics
    Lab, E453R | Baylor University Sciences Building (BSB) | Office:
    E454R,BSB.Phone- 254-710-2172 ( lab), 254-710-2155(office),
    281-460-8941(Personal)Email : mohit_agrawal<at>baylor.edu
    <mohit_agrawal<at>baylor.edu>, ism21.mohit<at>gmail.com
    <ism21.mohit<at>gmail.com>Home Address : Apt # 207, 1500 s, 9th street, 76706,
    Waco, Texas, USA.*

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09:47:44 v.9a3bf08e