气候变化领域集成服务门户(CCPortal): Seismic velocity reduction and accelerated recovery due to earthquakes on the Longmenshan fault

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DOI	10.1038/s41561-019-0347-1
	Seismic velocity reduction and accelerated recovery due to earthquakes on the Longmenshan fault
	Pei S.; Niu F.; Ben-Zion Y.; Sun Q.; Liu Y.; Xue X.; Su J.; Shao Z.
发表日期	2019
ISSN	17520894
卷号	12 期号:5
英文摘要	Various studies report on temporal changes of seismic velocities in the crust and attempt to relate the observations to changes of stress and material properties around faults. Although there are growing numbers of observations on coseismic velocity reductions, generally there is a lack of detailed observations of the healing phases. Here we report on a pronounced coseismic reduction of velocities around two locked sections (asperities) of the Longmenshan fault with a large slip during the 2008 Mw 7.9 Wenchuan earthquake and subsequent healing of the velocities. The healing phase accelerated significantly at the southern asperity right after the nearby 2013 Mw 6.6 Lushan earthquake. The results were obtained by joint inversions of travel time data at four different periods across the Wenchuan and Lushan earthquakes. The rapid acceleration of healing in response to the Lushan earthquake provides unique evidence for the high sensitivity of seismic velocities to stress changes. We suggest that stress redistribution plays an important role in rebuilding fault strength. © 2019, The Author(s), under exclusive licence to Springer Nature Limited.
语种	英语
scopus关键词	acceleration; coseismic process; fault; Lushan earthquake 2013; seismic velocity; Sichuan earthquake 2008; slip; China; Longmenshan Fault Zone; Sichuan
来源期刊	Nature Geoscience
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/124672
作者单位	CAS Center for Excellence in Tibetan Plateau Earth Sciences, Chinese Academy of Sciences (CAS), Beijing, China; CAS Key Laboratory of Continental Collision and Plateau Uplift, Institute of Tibetan Plateau Research, Chinese Academy of Sciences (CAS), Beijing, China; State Key Laboratory of Petroleum Resources and Prospecting, and Unconventional Gas Institute, China University of Petroleum at Beijing, Beijing, China; Department of Earth, Environmental and Planetary Sciences, Rice University, Houston, TX, United States; Department of Earth Sciences, University of Southern California, Los Angeles, CA, United States; Earthquake Administration of Sichuan Province, Chengdu, China; Institute of Earthquake Science, China Earthquake Administration, Beijing, China
推荐引用方式 GB/T 7714	Pei S.,Niu F.,Ben-Zion Y.,et al. Seismic velocity reduction and accelerated recovery due to earthquakes on the Longmenshan fault[J],2019,12(5).
APA	Pei S..,Niu F..,Ben-Zion Y..,Sun Q..,Liu Y..,...&Shao Z..(2019).Seismic velocity reduction and accelerated recovery due to earthquakes on the Longmenshan fault.Nature Geoscience,12(5).
MLA	Pei S.,et al."Seismic velocity reduction and accelerated recovery due to earthquakes on the Longmenshan fault".Nature Geoscience 12.5(2019).