气候变化领域集成服务门户(CCPortal): Stress triggering of the 2022 Lushan-Maerkang earthquake sequence by historical events and its implication for fault stress evolution in eastern Tibet

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DOI	10.3389/feart.2023.1105394
	Stress triggering of the 2022 Lushan-Maerkang earthquake sequence by historical events and its implication for fault stress evolution in eastern Tibet
	Tang, Dawei; Ge, Weipeng; Cao, Xiyu
发表日期	2023
EISSN	2296-6463
卷号	11
英文摘要	It remains unknown how stress triggering causes earthquakes in the eastern Tibetan Plateau following the Wenchuan Earthquake in 2008. The M-S 6.1 Lushan earthquake on 1 June 2022 in a seismic gap between the 2008 M-W 7.9 Wenchuan earthquake and the 2013 M-W 6.6 Lushan earthquake provided an opportunity to detect stress evolution and seismic activity on the fault in this study. We calculated the Coulomb stress change of the June 2022 Lushan-Maerkang earthquake sequence using a Burgers viscoelastic model and, herein, discuss how the sequence have been triggered by historical earthquakes since 1900 in the eastern Tibetan Plateau. Our results suggest the following trends: 1) the 1955 M 7.6 Kangding and 2008 M-W 7.9 Wenchuan earthquakes contributed most significant loading effects on the 2022 M-S 6.1 Lushan earthquake; however, the 2013 M-W 6.6 Lushan earthquake had an unloading effect on the 2022 Lushan earthquake. 2) The 2021 M-W 7.3 Maduo earthquake contributed a loading effect on the 2022 Lushan earthquake, and the 2022 Lushan earthquake may have triggered the subsequent Maerkang earthquake swarm on 10 June 2022. 3) Viscoelastic relaxation of the lower crust and upper mantle contributed significantly to fault stress level, while a fault in a late-phase earthquake cycle may have ruptured via slight stress perturbation near a cross-border conversion between positive and negative stress from a far-field earthquake. We also provide a seismic potential assessment along the faults in the eastern Tibet. Notably, the M-W 6.8 Luding earthquake that ruptured the southern segment of the Xianshuihe Fault on 5 September 2022 supports the conclusions of this study.
关键词	eastern Tibetan Plateau the M-S 6.1 Lushan earthquake historical earthquakes since 1900 Coulomb stress trigger positive and negative cross-border stress conversion
英文关键词	2008 WENCHUAN EARTHQUAKE; HECTOR-MINE-EARTHQUAKE; LOWER CRUSTAL FLOW; COULOMB STRESS; POSTSEISMIC DEFORMATION; JIUZHAIGOU EARTHQUAKE; ACTIVE TECTONICS; LONGMEN SHAN; SLIP; SICHUAN
WOS研究方向	Geosciences, Multidisciplinary
WOS记录号	WOS:000950530300001
来源期刊	FRONTIERS IN EARTH SCIENCE
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/283327
作者单位	China Earthquake Administration
推荐引用方式 GB/T 7714	Tang, Dawei,Ge, Weipeng,Cao, Xiyu. Stress triggering of the 2022 Lushan-Maerkang earthquake sequence by historical events and its implication for fault stress evolution in eastern Tibet[J],2023,11.
APA	Tang, Dawei,Ge, Weipeng,&Cao, Xiyu.(2023).Stress triggering of the 2022 Lushan-Maerkang earthquake sequence by historical events and its implication for fault stress evolution in eastern Tibet.FRONTIERS IN EARTH SCIENCE,11.
MLA	Tang, Dawei,et al."Stress triggering of the 2022 Lushan-Maerkang earthquake sequence by historical events and its implication for fault stress evolution in eastern Tibet".FRONTIERS IN EARTH SCIENCE 11(2023).