气候变化领域集成服务门户(CCPortal): Ductile Gap between the Wenchuan and Lushan Earthquakes Revealed from the Two-dimensional Pg Seismic Tomography

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DOI	10.1038/srep06489
	Ductile Gap between the Wenchuan and Lushan Earthquakes Revealed from the Two-dimensional Pg Seismic Tomography
	Pei, Shunping; Zhang, Haijiang; Su, Jinrong; Cui, Zhongxiong
通讯作者	Pei, SP (通讯作者)
发表日期	2014
ISSN	2045-2322
卷号	4
英文摘要	A high-resolution two-dimensional Pg-wave velocity model is obtained for the upper crust around the epicenters of the April 20, 2013 Ms7.0 Lushan earthquake and the May 12, 2008 Ms8.0 Wenchuan earthquake, China. The tomographic inversion uses 47235 Pg arrival times from 6812 aftershocks recorded by 61 stations around the Lushan and Wenchuan earthquakes. Across the front Longmenshan fault near the Lushan earthquake, there exists a strong velocity contrast with higher velocities to the west and lower velocities to the east. Along the Longmenshan fault system, there exist two high velocity patches showing an X'' shape with an obtuse angle along the near northwest-southeast (NW-SE) direction. They correspond to the Precambrian Pengguan and Baoxing complexes on the surface but with a similar to 20 km shift, respectively. The aftershock gap of the 2008 Wenchuan and the 2013 Lushan earthquakes is associated with lower velocities. Based on the theory of maximum effective moment criterion, this suggests that the aftershock gap is weak and the ductile deformation is more likely to occur in the upper crust within the gap under the near NW-SE compression. Therefore our results suggest that the large earthquake may be hard to happen within the gap.
关键词	W 6.6 LUSHAN VELOCITY STRUCTURE M(S)7.0 EARTHQUAKE FOCAL MECHANISMS YUSHU EARTHQUAKE RUPTURE PROCESS CHINA QINGHAI SICHUAN STRESS
语种	英语
WOS研究方向	Science & Technology - Other Topics
WOS类目	Multidisciplinary Sciences
WOS记录号	WOS:000342449600001
来源期刊	SCIENTIFIC REPORTS
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/258281
推荐引用方式 GB/T 7714	Pei, Shunping,Zhang, Haijiang,Su, Jinrong,et al. Ductile Gap between the Wenchuan and Lushan Earthquakes Revealed from the Two-dimensional Pg Seismic Tomography[J]. 中国科学院青藏高原研究所,2014,4.
APA	Pei, Shunping,Zhang, Haijiang,Su, Jinrong,&Cui, Zhongxiong.(2014).Ductile Gap between the Wenchuan and Lushan Earthquakes Revealed from the Two-dimensional Pg Seismic Tomography.SCIENTIFIC REPORTS,4.
MLA	Pei, Shunping,et al."Ductile Gap between the Wenchuan and Lushan Earthquakes Revealed from the Two-dimensional Pg Seismic Tomography".SCIENTIFIC REPORTS 4(2014).