Dynamic simulation of interactions between major earthquakes on the Xianshuihe fault zone

作     者：WANG Hui LIU Jie SHI YaoLin ZHANG Huai ZHANG GuoMin 

作者机构：Institute of Earthquake ScienceChina Earthquake AdministrationBeijing 100036China Laboratory of Computational GeodynamicsGraduate University of Chinese Academy of SciencesBeijing 100049China China Earthquake Network CenterChina Earthquake AdministrationBeijing 100045China 

出 版 物：《Science China Earth Sciences》 (中国科学（地球科学英文版）)

年 卷 期：2008年第51卷第10期

页      面：1388-1400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：the Ministry of Science and Technology of China (Grant No. 2004CB418406) the "Basic Science Research Plan" of the Institute of Earth-quake Science, China Earthquake Administration (Grant No. 2007-03) 

主　　题：Xianshuihe fault zone strain accumulation and releasing recurrence interval finite element method Coulomb failure stress changes 

摘      要：The authors firstly evaluate the strain accumulation rate of the Xianshuihe fault zone based on earthquake activity. We calculated the stress and seismic moment accumulation rate for each subsection of the Xianshuihe fault zone based on the distribution of geological slip rate and GPS survey results. According to the results, we get the recurrence intervals of characterized earthquakes on each subsection respectively. A three-dimensional finite element model for western Sichuan is constructed to discuss the earthquakes triggering among major earthquakes ({ntM}6.7) that occurred along the Xianshuihe fault zone since 1893. The calculated Coulomb failure stress changes (?CFS) show that 5 of the 6 earthquakes with Ms6.7 were triggered by positive ?CFS. The interactions between major earthquakes not only influence recurrence intervals of characterized earthquakes on each subsection, but also change recurrence behavior of major earthquakes along the whole fault zone.