Discrimination between nuclear explosions and earthquakes based on consideration of tectonic ambient shear stress values

作     者：CHEN Pei-shan 

作者机构：1. Institute of Geophysics China Seismological Bureau 100081 Beijing China 

出 版 物：《Acta Seismologica Sinica(English Edition)》 (地震科学)

年 卷 期：2001年第14卷第3期

页      面：259-262页

核心收录：

学科分类：070801[理学-固体地球物理学] 07[理学] 0708[理学-地球物理学] 

基　　金：国家自然科学基金 

主　　题：tectonic ambient shear stress field earthquake nuclear explosion discrimination of nuclear explosions from earthquakes level of stress field P315.72+7 

摘      要：On the basis of fracture mechanics earthquake rupture model, the relations between source parameters and τ0, the value of tectonic ambient shear stress in the place where the earthquake occurs, have been derived. Thus, we can calculate a large number of values of tectonic ambient shear stress or values of background stress in the place where the earthquake occurs. If nuclear explosions are treated as earthquakes in the calculation, we find that τ0 values of nuclear explosions have about 20 MPa, which is obviously higher than average τ0 values of earthquakes with the same magnitude. This result can be used to discriminate nuclear explosions from earthquakes.