气候变化领域集成服务门户(CCPortal): The 2019 MW 5.7 Changning Earthquake; Sichuan Basin; China: A Shallow Doublet With Different Faulting Styles

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DOI	10.1029/2019GL085408
	The 2019 MW 5.7 Changning Earthquake; Sichuan Basin; China: A Shallow Doublet With Different Faulting Styles
	Liu J.; Zahradník J.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:4
英文摘要	The increased seismic activity of the last ~10 years in Changning county of Sichuan Province comprised just small (mostly ML < 5.0) injection-induced earthquakes. The MW 5.7 earthquake on June 17, 2019, is the largest event ever reported there. Moment tensor of the mainshock was remarkably dominated by a compensated linear vector dipole. We resolve its fine structure showing it was a doublet, allowing approximation by a thrust- and strike-slip subevent. The mainshock nucleated as thrust faulting, which (together with the largest aftershocks) can be linked with previously known reverse faults, favorably oriented to regional stress field. Contrarily, the strike-slip segment of the mainshock, less favorably oriented, was probably facilitated by elevated pore pressure due to previous injections. Shallow active strike-slip faulting, not yet mapped in the region, is a new feature, important for future hazard assessment. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Earthquakes; Strike-slip faults; Hazard Assessment; Multiple point sources; non-double couple; Regional stress field; Seismic activity; Sichuan province; Strike slip faulting; Thrust faulting; Fault slips; earthquake event; faulting; model; pore pressure; strike-slip fault; thrust fault; Changning [Yunnan]; China; Sichuan Basin
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/170724
作者单位	Jilin Earthquake Agency, China Earthquake Administration, Changchun, China; Faculty of Mathematics and Physics, Charles University, Prague, Czech Republic
推荐引用方式 GB/T 7714	Liu J.,Zahradník J.. The 2019 MW 5.7 Changning Earthquake; Sichuan Basin; China: A Shallow Doublet With Different Faulting Styles[J],2020,47(4).
APA	Liu J.,&Zahradník J..(2020).The 2019 MW 5.7 Changning Earthquake; Sichuan Basin; China: A Shallow Doublet With Different Faulting Styles.Geophysical Research Letters,47(4).
MLA	Liu J.,et al."The 2019 MW 5.7 Changning Earthquake; Sichuan Basin; China: A Shallow Doublet With Different Faulting Styles".Geophysical Research Letters 47.4(2020).