Regional discrimination research and methodology implementation: Analyses of CDSN and Soviet IRIS data. Technical report

Technical Report · Sun Jul 01 04:00:00 EDT 1990

OSTI ID:5806171

Bennett, T J; Scheimer, J F; Campanella, A K; Murphy, J R

The objective of this research is to evaluate the capability of regional stations in discrimination of underground nuclear explosions from earthquakes and non-nuclear explosions. Efforts during the first year of this program have focused on studies of regional data from the Chinese Digital Seismic Network(CDSN) and Incorporated Research Institutions for Seismology(IRIS) stations in the Soviet Union. A previous report described observations from the CDSN station at WMQ which indicated differences in relative spectral content of Lg versus regional P for explosions and earthquakes. In the current research we used different spectral analyses to study the signals from a larger event sample including 27 East Kazakh explosions and 32 regional earthquakes. Lg/P ratios for regional earthquakes were found to be enriched at high frequencies compared to similar explosions. In comparing explosions from Shagan River and Degelen Mountain areas it was found that regional P signals are relatively stronger from SR than from DM explosions with similar Lg signals. Analysis of East Kazakh explosion signals recorded at Soviet IRIS stations indicates that regional signals are observable down to very low magnitudes. Lg magnitude residuals from these stations have been used to derive effective Q values for these paths.

• Research Organization: S-Cubed, San Diego, CA (USA)
• OSTI ID: 5806171
• Report Number(s): AD-A-230251/1/XAB; SSS-TR--90-11757; CNN: F19628-89-C-0043
• Country of Publication: United States
• Language: English

Related Subjects

350300 -- Arms Control-- Verification-- (1987-)
45 MILITARY TECHNOLOGY, WEAPONRY, AND NATIONAL DEFENSE
450300* -- Military Technology
Weaponry
& National Defense-- Nuclear Explosion Detection
98 NUCLEAR DISARMAMENT, SAFEGUARDS, AND PHYSICAL PROTECTION
ASIA
DETECTION
EARTHQUAKES
ENRICHMENT
EUROPE
EVALUATION
EXPLOSIONS
MOUNTAINS
NUCLEAR EXPLOSION DETECTION
RESEARCH PROGRAMS
SEISMIC DETECTION
SEISMIC EVENTS
SEISMOLOGY
SIGNALS
SPECTRA
UNDERGROUND EXPLOSIONS
USSR