In September 1996, the United Nations General Assembly adopted the Comprehensive Nuclear-Test-Ban Treaty (CTBT), prohibiting nuclear explosions worldwide, in all environments. The treaty calls for a global verification system, including a network of 321 monitoring stations distributed around the globe, a data communications network, an international data center, and onsite inspections, to verify compliance. The problem of identifying small-magnitude banned nuclear tests and discriminating between such tests and the background of earthquakes and mining-related seismic events, is a challenging research problem. Because they emphasize CTBT verification research, the 12 papers in this special volume primarily addresses regional data recorded by a variety of arrays, broadband stations, and temporarily deployed stations. Nuclear explosions, earthquakes, mining-related explosions, mine collapses, single-charge and ripple-fired chemical explosions from Europe, Asia, North Africa, and North America are all studied. While the primary emphasis is on short-period, body-wave discriminants and associated source and path corrections, research that focuses on long-period data recorded at regional and teleseismic distances is also presented Hence, these papers demonstrate how event identification research in support of CTBT monitoring has expanded in recent years to include a wide variety of event types, data types, geographic regions and statistical techniques.
Table of ContentsPreface: Monitoring the Comprehensive Nuclear-Test-Ban Treaty.- Amplitude Corrections for Regional Seismic Discriminants.- Path Corrections for Source Discriminants: A Case Study at Two International Seismic Monitoring Stations.- Seismic Discrimination of the May 11, 1998 Indian Nuclear Test with Shortperiod Regional Data from Station NIL (Nilore, Pakistan).- Observed Characteristics of Regional Seismic Phases and Implications for P/S Discrimination in the European Arctic.- Study of Regional Surface Waves and Frequency-dependent Ms:mb Discrimination in the European Arctic.- Identification of Earthquakes and Explosions Using Amplitude Ratios: The Vogtland Area Revisited.- Seismic Event Identification of Earthquakes and Explosions in Germany Using Spectral.- Signal Processing for Indian and Pakistan Nuclear Tests Recorded at IMS Stations Located in Israel.- Discriminating Between Large Mine Collapses and Explosions Using Teleseismic P Waves.- Identification of Mining Blasts at Mid- to Far-regional Distances Using Low Frequency Seismic Signals.- Experimental Seismic Event-screening Criteria at the Prototype International Data Center.- Testing for Multivariate Outliers in the Presence of Missing Data.