气候变化领域集成服务门户(CCPortal): Coseismic and early postseismic deformation associated with the January 2022 Mw 6.6 Menyuan earthquake, NE Tibet, revealed by InSAR Observations

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DOI	10.1016/j.tecto.2023.230090
	Coseismic and early postseismic deformation associated with the January 2022 Mw 6.6 Menyuan earthquake, NE Tibet, revealed by InSAR Observations
	Yang, Jiuyuan; Xu, Caijun; Wen, Yangmao
发表日期	2023
ISSN	0040-1951
EISSN	1879-3266
卷号	868
英文摘要	The 7 January 2022 M-w 6.6 Menyuan earthquake struck the Qilian-Haiyuan fault zone, NE Tibet, offering a chance for understanding the regional seismogenic structure and rupture behavior. We use Interferometric synthetic aperture radar data to study the coseismic and early postseismic deformation of the event. Coseismic modelling highlights that the earthquake activated two strike-variable high-angle strike-slip faults (one SE-trending main fault and one ENE-striking secondary fault) corresponding to only part of the Lenglongling and Tuolaishan faults. Further postseismic analysis not only reveals a localized postseismic signal of up to similar to 3 cm related to the mainshock but identifies an obvious coseismic signal of up to similar to 2.3 cm associated with an M-W 5.1 aftershock characterized by sinistral strike-slip-faulting. The 2022 Menyuan earthquake, large aftershock and 2016 M-w 5.9 thrust-faulting Menyuan earthquake illuminate a positive flower structure of the Lenglongling fault. By a joint analysis of the inversions, fault kinematics and historical earthquake, we suggest that fault branches and low pre-stress jointly restrain the maximum rupture size in the 2022 Menyuan event.
关键词	Menyuan earthquake InSAR Co- and post-seismic deformation Strike-variable rupture fault Flower structure Rupture size
英文关键词	SLIP; MARGIN; FAULTS
WOS研究方向	Geochemistry & Geophysics
WOS记录号	WOS:001111958600001
来源期刊	TECTONOPHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/283250
作者单位	Wuhan University; North China University of Water Resources & Electric Power; Wuhan University; Ministry of Natural Resources of the People's Republic of China
推荐引用方式 GB/T 7714	Yang, Jiuyuan,Xu, Caijun,Wen, Yangmao. Coseismic and early postseismic deformation associated with the January 2022 Mw 6.6 Menyuan earthquake, NE Tibet, revealed by InSAR Observations[J],2023,868.
APA	Yang, Jiuyuan,Xu, Caijun,&Wen, Yangmao.(2023).Coseismic and early postseismic deformation associated with the January 2022 Mw 6.6 Menyuan earthquake, NE Tibet, revealed by InSAR Observations.TECTONOPHYSICS,868.
MLA	Yang, Jiuyuan,et al."Coseismic and early postseismic deformation associated with the January 2022 Mw 6.6 Menyuan earthquake, NE Tibet, revealed by InSAR Observations".TECTONOPHYSICS 868(2023).