Accession Number : ADA185959

Title :   Technical Report for the Period 1 April-30 Jun 1987,

Corporate Author : SCIENCE APPLICATIONS INTERNATIONAL CORP ARLINGTON VA CENTER FOR SEISMIC STUDI ES

Personal Author(s) : Baumstark, R ; Campanella, A ; Dysart, P ; Israelsson, H ; Jurkevics, A

PDF Url : ADA185959

Report Date : Aug 1987

Pagination or Media Count : 3

Abstract : Two technical notes related to network capability and design. One compares mean values of short-period seismic noise measured during the GSE Technical Test with published values of Ring-dal for stable and tectonically active regions. A second compares depth determinations during the 1980 Common Data Base Experiment with theoretical detection thresholds. The third considers the significance of local and regional data in a global monitoring system. Two reports on research to improve analysis of regional seismic data. One is based on a consideration of particle motion of regional phases, and recommends ways to implement automated or interactive particle-motion analysis of regional seismic waveforms. The other focuses on event characterization of 95 earthquakes, mine blasts and offshore events recorded at NORESS. Miscellaneous topics deal with azimuth determination using polarization parameters of P and LR waves; reanalysis fo sub b bias between a recording site in eastern Kazakh and a station on and a new database containing waveforms from stations being operated in eastern Kazakh under an agreement between the Soviet Academy of Sciences and the Natural Resources Council.

Descriptors :   *SEISMIC DATA, *SEISMOLOGY, *SEISMIC DETECTION, AZIMUTH, DATA BASES, DETECTION, DETERMINATION, GLOBAL, MONITORING, MOTION, NETWORKS, NORWAY, OFFSHORE, PARTICLES, RECORDING SYSTEMS, SEISMIC ARRAYS, SEISMIC WAVES, SHORT RANGE(TIME), SITES, THRESHOLD EFFECTS, DATA REDUCTION, NUCLEAR EXPLOSION DETECTION

Subject Categories : Seismology
      Seismic Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE