库仑应力变化与余震对应关系的初步探讨—以集集地震为例  

Discussion about the relation of coulumb stress changes and distribution of aftersocks for the case of the chi-chi earthquake

作　　者：邵志刚[1,2] 傅容珊[2] 薛霆境 查显杰[2] 

机构地区：[1]中国科学技术大学地球和空间科学院,合肥230026 [2]中国地震局地震预测研究所,北京100036

出　　处：《地球物理学进展》2009年第2期367-374,共8页Progress in Geophysics

基　　金：地震预测研究所基本科研业务专项(02076902-11);国家自然科学基金项目(40574043)资助

摘　　要：本文以集集地震为例,讨论了在多个小断层的位错模型,分层地质结构这种更加接近实际的情况下的库仑应力变化,计算结果表明有必要考虑这些符合实际的模型.本文分别讨论了走滑断层上库仑应力变化与走滑地震、逆冲断层上库仑应力变化与逆冲地震空间分布的对应关系,计算结果表明集集地震所引起的库仑应力变化确实有利于本地区余震的发生.This paper deals with the Coulumb stress change according to the fault model composed of many small faults and layered geological crust model. Then we take Chi-Chi earthquake for example, to analyza the relation of the Coulumb stress change and the spatial distribution of the aftersocks. This paper discusses the relations the Coulumb stress change on the strike fault, dip fault and the distribution of strike earthquakes and dip earthquakes, respectively. The results demonstrate that the Coulumb stress change caused by the Chi-Chi earthquake is favorable to the occurrence of aftershockes in this region.

关 键 词：库仑应力变化 余震分布 集集地震 

分 类 号：P315[天文地球—地震学]