Technical Information
The array of portable broadband seismological observatories was deployed in stages during summer and fall of 1998, and stayed in operation through the end of summer of 1999. Information about individual sites is here.

Raw data from the experiment is archived at the Data Management Center operated by the IRIS consortium.
The original field tapes with raw data are stored in Yale. Yale also has a collection of tapes with data in SEED format. See this index for availability.

Results of ongoing data analysis

Photo-tour

A picture taken through the helicopter porthole during the 1997 field campaign in Kamchatka

Petropavlovsk-Kamchatsky (the City of Peter-and-Paul in Kamchatka) is dominated by the active volcanoes.

An abandoned tank facing the Pacific, waiting for an American invasion...

Sunset in the central valley of Kamchatka, June 1998 


PHOTO ALBUM 97
PHOTO ALBUM 98

Examples of data
A record section of M=6.3 VANUATU ISL. earthquake on September, 21, 1998. Shown are vertical traces from 6 stations operational at the time.

P-S converted phases clearly visible in the records of the first-arriving P wave from an earthquake on 02/06/1999. Direction towards the hypocenter is ~172 degrees, with compressional (P) and radial (SV) motion concentrated on Z and N channels, and transverse (SH) motion - on E channel. See maps for station locations.


  • Automatic Earthquake Bulletin produced by a regional seismic network operated by Geophysical Service (Kamchatka branch) of Russian Academy of Sciences.

  • A text version of this catalog for the time when the array was operational is available here Some locations in this catalog are reviewed and revised later, contact regional operators.



    Known data problems and quirks

    A number of sites was affected by a serious malfunction
    of the data acquisition systems, manifested in polarity reversals and large changes in
    gain. The problem was investigated in some detail, and documented, for PAN, where
    the problem was most severe. Other sites where the problem was diagnosed:
    PZT, TKI (large fraction of the recording period), MIL , ZUP (occasional glitches).
    The problem appears to be caused by the common mode voltage arrising through
    poor insulation from the ground. Peculiarity of local power sources may have had something to do with the malfuction as well.
    Besides V. Levin, extensive amount of time was spent
    on this problem by J. Fowler and D. Johnson of PASSCAL.
    Empirically, the problem appears to be "correctable" , in the sense that
    deviations from nominal recording parameters are reasonably stable, and may be accounted for.
     

    At some sites (PAN, BNG) changes were made during the deployment, read
    station notes.
     

    Page Updated 01/22/2001
    Vadim Levin