Shallow microearthquakes near Chongqing, China triggered by the Rayleigh waves of the 2015 M7.8 Gorkha, Nepal earthquake

doi:10.1016/j.epsl.2017.09.024

CORC > 地质与地球物理研究所 > 中国科学院地质与地球物理研究所 > 岩石圈演化研究室

	Shallow microearthquakes near Chongqing, China triggered by the Rayleigh waves of the 2015 M7.8 Gorkha, Nepal earthquake
	Han, Libo 1; Peng, Zhigang 2; Johnson, Christopher W.3; Pollitz, Fred F.4; Li, Lu 1; Wang, Baoshan 1; Wu, Jing 5; Li, Qiang 6; Wei, Hongmei 6
刊名	EARTH AND PLANETARY SCIENCE LETTERS
	2017-12-01
卷号	479 页码:231-240
关键词	Dynamic Triggering Rayleigh Waves Gorkha Earthquakes Induced Earthquakes
ISSN号	0012-821X
DOI	10.1016/j.epsl.2017.09.024
文献子类	Article
英文摘要	We present a case of remotely triggered seismicity in Southwest China by the 2015/04/25 M7.8 Gorkha, Nepal earthquake. A local magnitude M(L)3.8 event occurred near the Qijiang district south of Chongqing city approximately 12 min after the Gorkha mainshock. Within 30 km of this ML3.8 event there are 62 earthquakes since 2009 and only 7 M-L > 3 events, which corresponds to a likelihood of 0.3% for a M-L > 3 on any given day by a random chance. This observation motivates us to investigate the relationship between the M(L)3.8 event and the Gorkha mainshock. The M(L)3.8 event was listed in the China Earthquake National Center (CENC) catalog and occurred at shallow depth (similar to 3 km). By examining high-frequency waveforms, we identify a smaller local event (similar to M(L)2.5) similar to 15 s before the M(L)3.8 event. Both events occurred during the first two cycles of the Rayleigh waves from the Gorkha mainshock. We perform seismic event detection based on envelope function and waveform matching by using the two events as templates. Both analyses found a statistically significant rate change during the mainshock, suggesting that they were indeed dynamically triggered by the Rayleigh waves. Both events occurred during the peak normal and dilatational stress changes (similar to 10-30 kPa), consistent with observations of dynamic triggering in other geothermal/volcanic regions. Although other recent events (i.e., the 2011 M9.1 Tohoku-Oki earthquake) produced similar peak ground velocities, the 2015 Gorkha mainshock was the only event that produced clear dynamic triggering in this region. The triggering site is close to hydraulic fracturing wells that began production in 2013-2014. Hence we suspect that fluid injections may increase the region's susceptibility to remote dynamic triggering. (C) 2017 Elsevier B.V. All rights reserved.
WOS关键词	7.9 WENCHUAN EARTHQUAKE ; UNITED-STATES ; SEISMICITY ; SEISMOGRAMS ; CALIFORNIA ; SUMATRA ; FAULT ; NUCLEATION ; EXPLOSIONS ; ALGORITHM
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000415778600020
资助机构	China National Special Fund for Earthquake Scientific Research in Public Interest(201408019-01) ; NSF(EAR-1447091 ; DGE1106400) ; China National Special Fund for Earthquake Scientific Research in Public Interest(201408019-01) ; NSF(EAR-1447091 ; DGE1106400) ; China National Special Fund for Earthquake Scientific Research in Public Interest(201408019-01) ; NSF(EAR-1447091 ; DGE1106400) ; China National Special Fund for Earthquake Scientific Research in Public Interest(201408019-01) ; NSF(EAR-1447091 ; DGE1106400)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/62478]
专题	地质与地球物理研究所_岩石圈演化研究室
通讯作者	Han, Libo
作者单位	1.China Earthquake Adm, Inst Geophys, Beijing 100081, Peoples R China 2.Georgia Tech, Sch Earth & Atmospher Sci, Atlanta, GA 30332 USA 3.Univ Calif Berkeley, Dept Earth & Planetary Sci, Berkeley, CA 94720 USA 4.US Geol Survey, Menlo Pk, CA 94025 USA 5.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 6.Earthquake Adm Chongqing Municipal, Chongqing 401147, Peoples R China
推荐引用方式 GB/T 7714	Han, Libo,Peng, Zhigang,Johnson, Christopher W.,et al. Shallow microearthquakes near Chongqing, China triggered by the Rayleigh waves of the 2015 M7.8 Gorkha, Nepal earthquake[J]. EARTH AND PLANETARY SCIENCE LETTERS,2017,479:231-240.
APA	Han, Libo.,Peng, Zhigang.,Johnson, Christopher W..,Pollitz, Fred F..,Li, Lu.,...&Wei, Hongmei.(2017).Shallow microearthquakes near Chongqing, China triggered by the Rayleigh waves of the 2015 M7.8 Gorkha, Nepal earthquake.EARTH AND PLANETARY SCIENCE LETTERS,479,231-240.
MLA	Han, Libo,et al."Shallow microearthquakes near Chongqing, China triggered by the Rayleigh waves of the 2015 M7.8 Gorkha, Nepal earthquake".EARTH AND PLANETARY SCIENCE LETTERS 479(2017):231-240.