Accession Number : ADA305476

Title :   Characterization of Seismic Source and Path in Central Eurasia Using Digital Seismograms from Borovoye Observatory, Northern Kazakhstan.

Descriptive Note : Final rept. 1 Sep 92-31 Aug 95,

Corporate Author : LAMONT-DOHERTY EARTH OBSERVATORY PALISADES NY

Personal Author(s) : Kim, Won-Young ; Richards, Paul G.

PDF Url : ADA305476

Report Date : 04 FEB 1996

Pagination or Media Count : 76

Abstract : This report is in three sections: (1) Decribes RMS Lg measurement for five Chinese nuclear explosions at Lop Nor recorded digitally at Borovoye, Kazakhstan (station BRVK). The regression shos scatter only a 0.045 magnitude units against ISC mb(P). (2) Summarizes a new method to determine the response of digital seismographs from their transient calibration pulses by iterative inverse technique. The method is use to derive complete instrument responses for STsR-TSG system at BRVK. (3) Describes a major survey of regional seismic data for explosions at the Semipal-atinsk test site, that has documented the occurrence of 18 small nuclear explosions at Degelen (since confirmed), not previously described in the open literature. A new PC based system is installed at Borovoye Geophysical Observatory, Kazakhstan for archive tape copying and about 100 raw tape copies have been transferred to LDEO. Part of the digital waveform data have been reformatted and submitted to the IRIS-DMC for interested scientists.

Descriptors :   *SEISMIC DETECTION, *NUCLEAR EXPLOSION DETECTION, DATA BASES, TRANSIENTS, DIGITAL SYSTEMS, WAVEFORMS, SEISMIC DATA, RESPONSE, SEISMIC WAVES, CALIBRATION, SEISMIC DISCRIMINATION, GEOPHYSICS, ANALOG TO DIGITAL CONVERTERS, CHINA, OBSERVATORIES, SEISMOGRAPHS, KAZAKHSTAN.

Subject Categories : Seismic Detection and Detectors
      Nuclear Warfare

Distribution Statement : APPROVED FOR PUBLIC RELEASE