Regional Body-Wave Discrimination Research.

Walter, W. R. ; Rodgers, A. ; Mayeda, K. ; Taylor, S.

Technical Information Center Oak Ridge Tennessee

关键词: Seismic waves;    Seismic detection;    Monitoring;    Seismic data;    Nuclear explosion detection;   

RP-ID  :  DE200515013192

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

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 can often be successfully identified by the Ms:mb discriminant. In order to monitor small events short-period regional waveform data recorded within 2000 km wiIl be needed because of poor signal-to-noise at large distances and/or long-periods. Many studies have shown that short-period regional body wave phases 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-, distance- and location-based corrections to apply to the regional data to allow wider data comparison and better discrimination performance. Building on prior work, we are developing a revised Magnitude and Distance Amplitude Correction (MDAC) procedure.