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

作　　者：陈培善 成瑾 白彤霞 

出　　处：《地震学报》2001年第3期246-249,共4页Acta Seismologica Sinica

基　　金：State Natural Science Foundation (49874010).

摘　　要：On the basis of fracture mechanics earthquake rupture model, the relations between source parameters and (0, 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 (0 values of nuclear explosions have about 20 MPa, which is obviously higher than average (0 values of earthquakes with the same magnitude. This result can be used to discriminate nuclear explosions from earthquakes.On the basis of fracture mechanics earthquake rupture model, Chen, et al. have derived relations between source parameters and τ 0 , the value of tectonic ambient shear stress in the place where the earthquake occurs. 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 τ 0 values of nuclear explosions have about 20 MPa, which is obviously higher than average τ 0 values of earthquakes with the same magnitude. This result can be used to discriminate nuclear explosions from earthquakes.

关 键 词：构造环境剪应力场 地震 核爆炸 应力场水平 震源参数 

分 类 号：P315.33[天文地球—地震学]