GPS constrained coseismic source and slip distribution of the 2013 Mw6.6 Lushan, China, earthquake and its tectonic implications

被引：130

作者：

Jiang, Zaisen ^{[1
]}

Wang, Min ^{[2
]}

Wang, Yanzhao ^{[2
]}

Wu, Yanqiang ^{[1
]}

Che, Shi ^{[3
]}

Shen, Zheng-Kang ^{[4
]}

Buergmann, Roland ^{[5
]}

Sun, Jianbao ^{[2
]}

Yang, Yonglin ^{[6
]}

Liao, Hua ^{[6
]}

Li, Qiang ^{[7
]}

机构：

[1] China Earthquake Adm, Inst Earthquake Sci, CEA Key Lab Earthquake Predict, Beijing, Peoples R China

[2] China Earthquake Adm, State Key Lab Earthquake Dynam, Inst Geol, Beijing, Peoples R China

[3] China Earthquake Adm, Beijing, Peoples R China

[4] Univ Calif Los Angeles, Dept Earth & Space Sci, Los Angeles, CA 90024 USA

[5] Univ Calif Berkeley, Dept Earth & Planetary Sci, Berkeley, CA 94720 USA

[6] Sichuan Earthquake Adm, Chengdu, Peoples R China

[7] China Earthquake Adm, Natl Earthquake Infrastruct Serv, Beijing, Peoples R China

来源：

GEOPHYSICAL RESEARCH LETTERS | 2014年 / 41卷 / 02期

基金：

美国国家科学基金会;

关键词：

Longmen Shan fault; Lushan earthquake; GPS; Coseismic displacement; Slip distribution; Deformation mechanism; POSITIONING SYSTEM MEASUREMENTS; WENCHUAN EARTHQUAKE; M(S)7.0 EARTHQUAKE; RUPTURE PROCESS; SICHUAN; DEFORMATION; MECHANISM; EVENT; RATES; ZONE;

D O I：

10.1002/2013GL058812

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

The 20 April 2013 Lushan earthquake occurred on the southern section of the Longmen Shan fault system. Using GPS data from 33 continuous stations, we derive a three-dimensional coseismic displacement field of the earthquake and invert for the location, geometry, and slip distribution of the fault rupture. Our study result indicates that the earthquake occurred on a reverse fault striking N28 degrees E and dipping 43 degrees to the NW, with the maximum slip located at 30.292 degrees N, 102.943 degrees E, and 13km depth. The rupture is dominated by thrust faulting, with a slight but still statistically significant sinistral component. The seismic moment release is 9.5x10(18)Nm, equivalent to a Mw6.6 earthquake. Our results suggest that at the southern end of the Longmen Shan fault zone near the triple junction with the Xianshuihe and Anninghe faults, the kinematic deformation field is no longer block-like, but broadly distributed to accommodate the buttressing effect of deformation around the fault triple junction. Key Points <list list-type="bulleted" id="grl51244-list-0001"> <list-item id="grl51244-li-0001">A set of three-dimensional GPS coseismic displacement data of Lushan earthquake is provided <list-item id="grl51244-li-0002">Rupture is dominated by thrust faulting with a significant sinistral component <list-item id="grl51244-li-0003">Main rupture is at 13 km depth, with moment release equivalent to Mw6.6 event

引用

页码：407 / 413

页数：7

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