Moment tensor inversion and source rupture process of the September 27, 2003 M_S=7.9 earthquake occurred in the border area of China, Russia and Mongolia

作     者：赵翠萍 陈章立 郑斯华 刘杰 

作者机构：Institute of GeophysicsChina Earthquake AdministrationBeijing 100081ChinaInstitute of Earthquake ScienceChina Earthquake AdministrationBeijing 100036ChinaEarthquake Administrationof Xinjiang Uygur Autonomous Regionürümqi830011China Institute of Earthquake ScienceChina Earthquake AdministrationBeijing 100036China 

出 版 物：《Acta Seismologica Sinica(English Edition)》 (ACTA SEISMOLOGICA SINICA)

年 卷 期：2005年第18卷第3期

页      面：255-268,378页

核心收录：

学科分类：070801[理学-固体地球物理学] 07[理学] 0707[理学-海洋科学] 0708[理学-地球物理学] 0818[工学-地质资源与地质工程] 0815[工学-水利工程] 0813[工学-建筑学] 0825[工学-航空宇航科学与技术] 0704[理学-天文学] 0814[工学-土木工程] 

基　　金：The Specialized Funds for National Key Basic Study (G1998040704)  the Dual Project of China Earthquake Admini-stration (9691309020301) and National Natural Science Foundation of China (46764010) 

主　　题：earthquake occurred in the boundary area of China Russia and Mongolia moment tensor inversion source rupture process barrier 

摘      要：plane with the strike of 127°, the dip of 79° and the rake of 171°. The rupture process inversion result of MS=7.9 earthquake shows that the total rupture duration is about 37 s, the scalar moment tensor is M0=0.97 × 1020 N·m. Rupture mainly occurred on the shallow area with 110 km long and 30 km wide, the location in which the rupture initiated is not where the main rupture took place, and the area with slip greater than 0.5 m basically lies within 35 km deep middle-crust under the earth surface. The maximum static slip is 3.6 m. There are two distinct areas with slip larger than 2.0 m. We noticed that when the rupture propagated towards northwest and closed to the area around the MS=7.3 hypocenter, the slip decreased rapidly, which may indicate that the rupture process was stopped by barriers. The consistence of spatial distribution of slip on the fault plane with the distribution of aftershocks also supports that the rupture is a heterogeneous process owing to the presence of barriers.