The Coulomb Stress Change Associated with the Taiwan Strait M_S7.3 Earthquake on Sep. 16, 1994 and the Risk Prediction of Its Surrounding Faults

详细信息   

• 责任者：Wang Shaowen (CAS ; Key Laboratory of Marginal Sea Geology ; South China Sea Institute of Oceanology ; Guangzhou 510301 ; China) ; Zhan Wenhuan
• 刊名：Earthquake Research in China
• 出版年：2011
• 卷期：27(4)
• 关键词：大震 ; great earthquakes ; 台湾海峡 ; Taiwan Strait
• 页码：p.419-430
• 图表：6 illus., 3 tables, 44 refs.
• 分类号：0500
• issnNo：ISSN1001-4683
• isbnNo：CN11-2008/P

摘要

 Using the focal mechanism and slip distribution model of the Taiwan Strait M_S7.3 earthquake on Sep.16,1994,the authors calculated the static coulomb stress change stemming from the earthquake.Based on the distribution of aftershocks and stress field as well as the location of historical earthquake,we researched the coulomb stress change of Taiwan Strait M_S7.3 earthquake.The result shows that:static coulomb stress change forward modeling based on slip distribution model is quite consistent with the location of aftershocks in the area that is far away from the epicenter.Ninety percent aftershocks occurred in the stress increased areas.The coulomb stress change is not entirely consistent with the distribution of aftershocks near the epicenter.It follows that coulomb stress change can better reflect the aftershock occurrence far away from epicenter,while such corresponding relationship becomes quite complex near epicenter.Through the calculation,we find that the coulomb stress change in southwest part of Min-Yue(Fujian-Guangdong) coastal fault zone is increased,and this enhances the seismic activity.As it is the intersection area of Min-Yue coastal fault with Shanghang-Dongshan fault,we considered the Nanpeng Island-Dongshan Island surroundings have a high potential seismic risk.