气候变化领域集成服务门户(CCPortal): The 2022 Mw 6.6 Menyuan Earthquake in the Northwest Margin of Tibet: Geodetic and Seismic Evidence of the Fault Structure and Slip Behavior of the Qilian-Haiyuan Strike-Slip Fault

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DOI	10.1785/0220220192
	The 2022 Mw 6.6 Menyuan Earthquake in the Northwest Margin of Tibet: Geodetic and Seismic Evidence of the Fault Structure and Slip Behavior of the Qilian-Haiyuan Strike-Slip Fault
	He, Ping; Liu, Chengli; Wen, Yangmao; Hu, Xiaoping; Ding, Kaihua; Xu, Caijun
发表日期	2023
ISSN	0895-0695
EISSN	1938-2057
起始页码	26
结束页码	38
卷号	94 期号:1
英文摘要	On 8 January 2022, an Mw 6.6 earthquake occurred along the Lenglongling fault (LLLF) (Menyuan, Qinghai Province, China), in the northeast margin of the Tibetan plateau. Here, we use imaging geodesy observations from pixel-offset tracking (POT) and Interferometric Synthetic Aperture Radar (InSAR) to quantify the coseismic displace-ment features and then combine InSAR and teleseismic velocity waveforms to constrain a finite-fault model to examine the kinematic slip behavior of the LLLF. We observe maximum displacements of > 50 cm in the line-of-sight InSAR observations and > 1 m in the east-west POT observations. Our preferred uniform-slip model indicates that the causative fault of this 2022 event ruptured the middle segment of the Qilian- Haiyuan fault (i.e., the LLLF) with a strike of 108.0 degrees, a dip angle of 83.6 degrees, and slip con-centrated within a 15 x 8 km2 area and reaching a maximum value of 4 m. The total scalar seismic moment was 1:24 x 1019 N center dot m, and similar to 67% of the energy was released in the first 6 s. We speculate that the 2022 event was controlled by complex fault geom-etries and slip partitioning, thus raising potential seismic risks associated with the out-ward extrusion of the plateau.
英文关键词	NORTHEASTERN MARGIN; ACTIVE FOLD; SHAN; DEFORMATION; THRUST; GPS; INSAR; EVOLUTION; GEOLOGY; GROWTH
WOS研究方向	Geochemistry & Geophysics
WOS记录号	WOS:000907170100003
来源期刊	SEISMOLOGICAL RESEARCH LETTERS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/283593
作者单位	China University of Geosciences - Wuhan; Wuhan University; China University of Geosciences - Wuhan
推荐引用方式 GB/T 7714	He, Ping,Liu, Chengli,Wen, Yangmao,et al. The 2022 Mw 6.6 Menyuan Earthquake in the Northwest Margin of Tibet: Geodetic and Seismic Evidence of the Fault Structure and Slip Behavior of the Qilian-Haiyuan Strike-Slip Fault[J],2023,94(1).
APA	He, Ping,Liu, Chengli,Wen, Yangmao,Hu, Xiaoping,Ding, Kaihua,&Xu, Caijun.(2023).The 2022 Mw 6.6 Menyuan Earthquake in the Northwest Margin of Tibet: Geodetic and Seismic Evidence of the Fault Structure and Slip Behavior of the Qilian-Haiyuan Strike-Slip Fault.SEISMOLOGICAL RESEARCH LETTERS,94(1).
MLA	He, Ping,et al."The 2022 Mw 6.6 Menyuan Earthquake in the Northwest Margin of Tibet: Geodetic and Seismic Evidence of the Fault Structure and Slip Behavior of the Qilian-Haiyuan Strike-Slip Fault".SEISMOLOGICAL RESEARCH LETTERS 94.1(2023).