气候变化领域集成服务门户(CCPortal): Free-Surface-Induced Supershear Transition in 3-D Simulations of Spontaneous Dynamic Rupture on Oblique Faults

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DOI	10.1029/2020GL091621
	Free-Surface-Induced Supershear Transition in 3-D Simulations of Spontaneous Dynamic Rupture on Oblique Faults
	Tang R.; Yuan J.; Gan L.
发表日期	2021
ISSN	0094-8276
卷号	48 期号:3
英文摘要	Several observations and simulations suggested that the supershear rupture induced by free surface invariably occurs in strike-slip faults rather than in dip-slip faults. To explore the mechanism of supershear transition induced by free surface on oblique faults, we simulate spontaneous dynamic rupture propagation governed by slip-weakening friction on nonvertical planar faults. We find that oblique thrust faults are more likely to produce free-surface-induced supershear transition than oblique normal faults and significant asymmetry arises between the two opposite directions along fault strike. The supershear rupture may only occur within shallow depth or over the entire seismogenic depth, depending on geometric relations between the slip and rupture propagation vectors. Our results help explain the lack of universal observation of supershear earthquakes. Besides, the asymmetric ground shaking on the oblique faults allows us to predict the possible spatial distribution of the high seismic risk. © 2020. American Geophysical Union. All Rights Reserved.
英文关键词	Strike-slip faults; Dip-slip faults; Dynamic ruptures; Geometric relations; Ground-shaking; Rupture propagation; Slip weakening; Supershear earthquakes; Supershear rupture; Fault slips
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/169145
作者单位	Institute of Geophysics, China Earthquake Administration, Beijing, China; National Institute of Natural Hazards, Ministry of Emergency Management of China, Beijing, China; Department of Geophysics, School of Earth and Space Sciences, Peking University, Beijing, China
推荐引用方式 GB/T 7714	Tang R.,Yuan J.,Gan L.. Free-Surface-Induced Supershear Transition in 3-D Simulations of Spontaneous Dynamic Rupture on Oblique Faults[J],2021,48(3).
APA	Tang R.,Yuan J.,&Gan L..(2021).Free-Surface-Induced Supershear Transition in 3-D Simulations of Spontaneous Dynamic Rupture on Oblique Faults.Geophysical Research Letters,48(3).
MLA	Tang R.,et al."Free-Surface-Induced Supershear Transition in 3-D Simulations of Spontaneous Dynamic Rupture on Oblique Faults".Geophysical Research Letters 48.3(2021).