Application of Advanced Methods for Identification and Detection of Nuclear Explosions from the Asian Continent.

摘要

The objective of this research program is to develop an optimum multi-discriminant/detection procedure for earthquake and underground explosions with emphasis on events occurring within the Asian continent. The approach to the seismic discrimination problem incorporates a number of diverse topics including: explosion and earthquake source modeling; stress wave propagation through realistic earth structures and prediction of teleseismically recorded ground motion; the development of signal detection, enhancement and identification techniques; multidiscriminant testing of a large population of worldwide events. One of the most significant achievements described in this report is the development of a three-dimensional finite difference stick-slip earthquake model and the characterization of the far-field (that which propagates to teleseismic distances) radiation of stress waves generated by this source. A theoretical analysis of the influence of tectonic release on the teleseismic short-period P-wave signature from underground nuclear explosions was also conducted. The principal result of this study is that in the case of most, if not all, explosions, tectonic release does not measurably affect the short-period P-wave signature. (Author)