Stress Shadow on the Southwest Portion of the Longmen Shan Fault Impacted the 2008 Wenchuan Earthquake Rupture

doi:10.1029/2018JB015633

YNAO OpenIR > 太阳物理研究组

	Stress Shadow on the Southwest Portion of the Longmen Shan Fault Impacted the 2008 Wenchuan Earthquake Rupture
	Liu, Chang 1; Dong, Peiyu 2; Zhu BJ(朱伯靖)3 ; Shi, Yaolin 4
通讯作者	Liu, Chang([email protected])
发表期刊	JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
	2018-11-01
卷号	123 期号:11 页码:9963-9981
DOI	10.1029/2018JB015633
产权排序	第3完成单位
收录类别	SCI
关键词	The 2008 Wenchuan earthquake stress shadow unilateral propagation fault interaction the Xianshui He fault the Longmen Shan fault
摘要	The 2008 Wenchuan earthquake (Mw7.9) unilaterally ruptured the Longmen Shan fault (LMSF) along eastern Tibet. The earthquake rupture propagated about 270km northeastward, whereas it propagated only about 20km southwestward along the strike of the fault. Although a significant attention has been paid to the question of predominantly unilateral propagation, the primary reasons for this type of propagation remain unclear. In this research, we examined the change of Coulomb stress along the LMSF caused by the historical earthquakes near and on the LMSF from 1725 to 2008. We found that the 14 preceding large earthquakes (M6.5) on the Xianshui He fault cast a stress shadow on the SW segment of the LMSF, which was not activated by the 2008 Wenchuan earthquake rupture. The 1970 Dayi earthquake on the SW segment of the LMSF contributed significantly to this stress shadow. Compared with the segment of the 2008 Wenchuan earthquake rupture, this stress shadow caused strong stress contrasts of -214, -22, and -80kPa in the seismic gap of the very SW segment of the LMSF, the rupture zone of the 2013 Lushan earthquake, and the seismic gap between the 2008 Wenchuan and 2013 Lushan earthquake ruptures, respectively. Stress contrasts in these values were consistent with tectonic loading over 165, 17, and 62years, respectively, by integrating an interseismic stress-loading rate of 1.3kPa/a. We proposed that this stress shadow might have created a barrier at the SW segment, preventing the earthquake rupture propagating southwestward.
资助项目	National Key R&D Program of China[2017YFC0602001] ; Fundamental Research Funds for the Central Universities[22120180260] ; National Natural Science Foundation of China[41404075] ; National Natural Science Foundation of China[41704101] ; National Natural Science Foundation of China[41704098] ; National Natural Science Foundation of China[41590865]
项目资助者	National Key R&D Program of China[2017YFC0602001] ; Fundamental Research Funds for the Central Universities[22120180260] ; National Natural Science Foundation of China[41404075, 41704101, 41704098, 41590865]
语种	英语
学科领域	地球科学
文章类型	Article
出版者	AMER GEOPHYSICAL UNION
出版地	2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
ISSN	2169-9313
URL	查看原文
WOS记录号	WOS:000454775200051
WOS研究方向	Geochemistry & Geophysics
WOS类目	Geochemistry & Geophysics
关键词[WOS]	W 6.6 LUSHAN ; TIBETAN PLATEAU ; EASTERN MARGIN ; XIANSHUIHE FAULT ; TECTONIC IMPLICATIONS ; VELOCITY STRUCTURE ; ACTIVE TECTONICS ; WESTERN SICHUAN ; CRUSTAL FLOW ; EVOLUTION
引用统计	被引频次：20[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ynao.ac.cn/handle/114a53/18250
专题	太阳物理研究组
通讯作者	Liu, Chang
作者单位	1.State Key Laboratory of Marine Geology, Tongji University, Shanghai, China 2.Institute of Seismology, China Earthquake Administration, and Hubei Earthquake Administration, Wuhan, China 3.Yunnan observatories, Chinese Academy of Sciences, Kunming, China 4.Key Laboratory of Computational Geodynamics, Chinese Academy of Sciences, Beijing, China
推荐引用方式 GB/T 7714	Liu, Chang,Dong, Peiyu,Zhu BJ,et al. Stress Shadow on the Southwest Portion of the Longmen Shan Fault Impacted the 2008 Wenchuan Earthquake Rupture[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,2018,123(11):9963-9981.
APA	Liu, Chang,Dong, Peiyu,Zhu BJ,&Shi, Yaolin.(2018).Stress Shadow on the Southwest Portion of the Longmen Shan Fault Impacted the 2008 Wenchuan Earthquake Rupture.JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,123(11),9963-9981.
MLA	Liu, Chang,et al."Stress Shadow on the Southwest Portion of the Longmen Shan Fault Impacted the 2008 Wenchuan Earthquake Rupture".JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 123.11(2018):9963-9981.

条目包含的文件
文件名称/大小	文献类型	版本类型	开放类型	使用许可
Stress Shadow On The（3837KB）	期刊论文	出版稿	开放获取	CC BY-NC-SA	浏览请求全文