Journal
ANNUAL REVIEW OF EARTH AND PLANETARY SCIENCES
Volume 37, Issue -, Pages 209-236Publisher
ANNUAL REVIEWS
DOI: 10.1146/annurev.earth.36.031207.124143
Keywords
global seismology; International Monitoring System; seismic discriminition methods; underground explosion source; earthquake source
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One application of forensic seismology is to help verify, compliance with the Comprehensive Nuclear-Test-Ban Treaty. One of the challenges Ewing the forensic seismologist is to discriminate between the many thousands of earthquakes of potential interest each and potential Treaty violations (underground explosions). There are four main methods: (a) ratio of body- to surface-wave magnitudes, (b) ratio of high-frequency P to S energy, (c) model-based methods, and (d) source depth. Methods (a) and (b) have all empirical basis. The weakness of methods (a)-(c) is the lack of an equivalent elastic source for,in underground explosion fired in the range of geological media found around the world. Reliable routine source-depth determination has proved difficult. However, experience gained in the past decade at identifying suspicious seismic sources suggests that although no single method works all of the time, intelligent and original application of complementary methods is usually sufficient to satisfactorily identify the source in question.
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