Title: FAULT INTERACTION AND EARTHQUAKE TRIGGERING DURING COSEISMIC PROCESS OF WENCHUAN EARTHQUAKE
Abstract:The 2008 MS8. 0 Wenchuan earthquake occurring in Wenchuan,Sichuan Province caused heavy casualties and serious economic losses. The northern part of Longmen Shan piedmont fault moved after the main ev...The 2008 MS8. 0 Wenchuan earthquake occurring in Wenchuan,Sichuan Province caused heavy casualties and serious economic losses. The northern part of Longmen Shan piedmont fault moved after the main event,with a burst to the surface. Using the model of two faults( Yingxiu-Beichuan and Guanxian-Jiangyou Fault),we discussed the earthquake triggering mechanism and time delay of frictional instability of Longmenshan piedmont fault. Based on the rate- and state-dependent frictional law,we deduced the time delay of new rupture on either condition that shear stress rate is zero or not,and used the results to infer the coseismic process of Wenchuan earthquake. After comparing the time delay of frictional instability of Longmenshan piedmont fault,which was derived from three-component strong ground motion observations of Mianzhu-Qingping and Wenchuan-Wolong stations,we obtained the same results. We found that Yingxiu-Beichuan and Guanxian-Jiangyou Faults did not move together at the same time,but the dynamic seismic waves( stress waves) radiated from YingxiuBeichuan Fault triggered the movement of Guanxian-Jiangyou Fault,with a possible time delay of several seconds.Read More
Publication Year: 2015
Publication Date: 2015-01-01
Language: en
Type: article
Access and Citation
AI Researcher Chatbot
Get quick answers to your questions about the article from our AI researcher chatbot