Inversion of coseismic stress-triggered fault slips using borehole strainmeter observations  

作　　者：邱泽华 阚宝祥 唐磊 张超凡 宋茉 

机构地区：[1]Institute of Crustal Dynamics, China Earthquake Administration,Beijing 100085, China [2]Graduate University of the Chinese Academy of Sciences,Beijing 100039, China

出　　处：《Acta Seismologica Sinica(English Edition)》2006年第6期643-649,共7页

基　　金：National Natural Science Foundation of China (40374011) and Joint Seismological Science of China (1040037).

摘　　要：Coseismic stress-triggering is becoming a new hot spot of research. Coseismic strain steps recorded by borehole strainmeters are particularly valuable in studying coseismic stress-triggered fault slips. Based on the theory of dis location, one can invert the triggered fault slips with such data if he/she has a well understanding about the local faults. Genetic algorithm can be applied to significantly raise the efficiency of searching a best solution among all possibilities in this kind of inversion. A testifying check of the program and analyses of each parameter＇s influence may further enhance the reliability of inversion results. Taking complexity of geological structure into account, the inversion results should be regarded as the predominant property or a comprehensive effect of triggered local faults＇ activities. As an attempt, we inverted the assumingly active faults＇ slips triggered by the Ms=8.1 Kunlun Mountain earthquake over Beijing area.Coseismic stress-triggering is becoming a new hot spot of research. Coseismic strain steps recorded by borehole strainmeters are particularly valuable in studying coseismic stress-triggered fault slips. Based on the theory of dis location, one can invert the triggered fault slips with such data if he/she has a well understanding about the local faults. Genetic algorithm can be applied to significantly raise the efficiency of searching a best solution among all possibilities in this kind of inversion. A testifying check of the program and analyses of each parameter＇s influence may further enhance the reliability of inversion results. Taking complexity of geological structure into account, the inversion results should be regarded as the predominant property or a comprehensive effect of triggered local faults＇ activities. As an attempt, we inverted the assumingly active faults＇ slips triggered by the Ms=8.1 Kunlun Mountain earthquake over Beijing area.

关 键 词：coseismic strain step stress triggering INVERSION DISLOCATION genetic algorithm （GA） the Kunlun Mountain earthquake 

分 类 号：P315[天文地球—地震学]