Regional Body-wave Discrimination Research
نویسندگان
چکیده
Monitoring the world for potential nuclear explosions requires identifying them by their expected seismic signatures and discriminating them from earthquakes and other sources of seismic waves. Large events (approximately mb > 4.0) can often be successfully identified by the MS:mb discriminant. In order to monitor small events (approximately mb < 4.0) short-period regional waveform data recorded within 2000 km will be needed because of poor signal-tonoise at large distances and/or long-periods. Many studies have shown that short-period (0.5-10 Hz) regional body wave phases (e.g. Pn, Pg, Sn, Lg and coda) have excellent discrimination power down to very small magnitudes when used at various nuclear tests sites. In order to broaden the application of these regional body wave techniques, we are developing size-, distanceand location-based corrections to apply to the regional data to allow wider data comparison and better discrimination performance.
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