气候变化领域集成服务门户(CCPortal): Detailed View of the Seismogenic Structures and Processes of the 2022 Bayan Har Intraplate Earthquake Swarm on the East Margin of the Qinghai-Tibet Plateau

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DOI	10.1785/0220220336
	Detailed View of the Seismogenic Structures and Processes of the 2022 Bayan Har Intraplate Earthquake Swarm on the East Margin of the Qinghai-Tibet Plateau
	Su, Jinrong; Lei, Xinglin; Li, Jun; Huang, Chunmei
发表日期	2023
ISSN	0895-0695
EISSN	1938-2057
起始页码	2167
结束页码	2180
卷号	94 期号:5
英文摘要	At 16:03 on 9 June 2022 (UTC), an Mw 5.5 earthquake followed by several Mw> 4 events, including the largest event of Mw 5.8 within a few hours, occurred in the Maerkang area near the Caodeng Hot Spring Town, located in the south-central part of the Bayan Har plate on the eastern margin of the Qinghai-Tibet plateau. The earthquake swarm allows understanding the tectonic stress environment of the Bayan Har plate and is an example of a typical moderate-to-strong intraplate earthquake swarm. This article comprehensively analyzes the detailed seismogenic fault structure of the swarm by means of precise hypocenter relocation, focal mechanism inversion for Mw> 4 earthquakes, inversion of the tectonic stress field in different regions of the Bayan Har plate, tidal strain calculation, and seismicity statistics. The results show that the swarm was not directly related to the nearby mapped Songgang fault, but rather resulted from the successive activation of a series of unknown faults. The precise hypocenter distribution, together with focal mechanism solutions of major earthquakes, illuminates five major seismogenic faults with conjugate relationships and stepover. Spatial and temporal migration of hypocenters, stress transfer, and tidal correlations demonstrate that cascade triggering, afterslip, and overpressured fluid might have jointly played a role in causing the earthquake swarm. As an output of this research, a set of verifiable datasets are provided as a basis for further in-depth research.
英文关键词	STRESS TRANSFER; FAULT; MIGRATION
WOS研究方向	Geochemistry & Geophysics
WOS记录号	WOS:001124725500004
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/283341
作者单位	China Earthquake Administration; Sichuan Earthquake Agency, CEA; National Institute of Advanced Industrial Science & Technology (AIST)
推荐引用方式 GB/T 7714	Su, Jinrong,Lei, Xinglin,Li, Jun,et al. Detailed View of the Seismogenic Structures and Processes of the 2022 Bayan Har Intraplate Earthquake Swarm on the East Margin of the Qinghai-Tibet Plateau[J],2023,94(5).
APA	Su, Jinrong,Lei, Xinglin,Li, Jun,&Huang, Chunmei.(2023).Detailed View of the Seismogenic Structures and Processes of the 2022 Bayan Har Intraplate Earthquake Swarm on the East Margin of the Qinghai-Tibet Plateau.SEISMOLOGICAL RESEARCH LETTERS,94(5).
MLA	Su, Jinrong,et al."Detailed View of the Seismogenic Structures and Processes of the 2022 Bayan Har Intraplate Earthquake Swarm on the East Margin of the Qinghai-Tibet Plateau".SEISMOLOGICAL RESEARCH LETTERS 94.5(2023).