han; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; mso-outline-level: 2" class=MsoNormal>Determination of the Initial Rupture of the 2008 Wenchuan Ms 8.0 Earthquake from Analysis of Fault Interaction during the Main Shock Process
- 责任者：Qian Qi (National Center for Active Fault Studies ; Institute of Geology ; China Earthquake Administration ; Beijing 100029 ; China) ; Han Zhujun
- 刊名：Earth Science Frontiers
- 出版年：2010
- 卷期：17(5)
- 关键词：汶川地震2008 ; Wenchuan earthquake 2008 ; 断层 ; faults ; 破裂 ; rupture ; 龙门山断裂带 ; Longmenshan Fault Zone
- 页码：p.84-92
- 图表：5 illus., 1 table, 26 refs.
- 分类号：0500
- issnNo：ISSN1005-2321
- isbnNo：CN11-3370/P
The 2008 Wenchuan Ms 8.0 earthquake has produced two long NE trending rupture zones as well as a short NW-strike rupture zone on the surface. In this paper, the authors established a seismic source model comprising three faults, the NE trending Beichuan-Yingxiu fault, the Pengguan fault, and the NW trending Xiaoyudong fault, and calculated Coulomb failure stress change during the source rupture. The authors considered two cases for the model. The study suggests that the NW trending Xiaoyudong fault should have been the initial rupturing member that triggered the NE directed Beichuan-Yingxiu fault and Pengguan fault to fail leading to the main shock.