气候变化领域集成服务门户(CCPortal): Coulomb stress models for the 2019 Ridgecrest, California earthquake sequence

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DOI	10.1016/j.tecto.2020.228555
	Coulomb stress models for the 2019 Ridgecrest, California earthquake sequence
	Pope N.; Mooney W.D.
发表日期	2020
ISSN	00401951
卷号	791
英文摘要	We present a Coulomb stress analysis for the July 4th Mw 6.4 and July 5th Mw 7.1 earthquakes of the 2019 Ridgecrest, California earthquake sequence. We find that the Coulomb stress on the Mw 6.4 rupture plane was increased by the 1872 Owens Valley earthquake and slightly increased by the 1952 Kern County earthquake. Like- wise, the rupture plane of the July 5th Mw 7.1 earthquake was promoted by both the Owens Valley and Kern County earthquakes, as well as being promoted slightly by the 1992 Landers earthquake and the 1999 Hector Mine earthquake. To investigate the regional Coulomb stress change from the Ridgecrest earthquake sequence, we calculate Coulomb stress change on nearby faults from both the Mw 6.4 and Mw 7.1 earthquakes. We find that the Mw 6.4 earthquake promoted failure at the epicen- ter of the Mw 7.1 earthquake, which struck 34 h later. Furthermore, the Mw 6.4 and Mw 7.1 Ridgecrest earthquakes increased Coulomb stress on the Garlock fault to the west of the rupture and decreased Coulomb stress to the east. The Panamint Valley fault was relaxed by the Ridgecrest earthquakes. The most significant stress change is an increase of Coulomb stress to the south of the Ridgecrest Sequence on the nearby Blackwater fault. The Blackwater fault, situated between the Lan- ders and Ridgecrest earthquakes, was loaded significantly by the Mw 7.1 Ridgecrest earthquake (up to 0.12 MPa) and by lesser amounts by the Landers and Hector Mine earthquakes. Of the known active faults in the region, including the Garlock fault, the Blackwater fault appears to have been loaded the most by the Ridgecrest earth- quakes. © 2020
关键词	2019 Ridgecrest earthquake California earthquake Coulomb stress Earthquake sequence Garlock fault Owens Valley fault
英文关键词	Earthquakes; Landforms; Stress analysis; Active fault; Coulomb stress; Coulomb stress changes; Earthquake sequences; Mine earthquakes; Owens valleys; Rupture plane; Stress changes; Faulting; active fault; earthquake catalogue; earthquake event; earthquake rupture; stress analysis; stress change; California; United States
语种	英语
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/207850
作者单位	U.S. Geological Survey, Earthquake Science Center, 345 Middlefield Rd, Menlo Park, CA 94025, United States
推荐引用方式 GB/T 7714	Pope N.,Mooney W.D.. Coulomb stress models for the 2019 Ridgecrest, California earthquake sequence[J],2020,791.
APA	Pope N.,&Mooney W.D..(2020).Coulomb stress models for the 2019 Ridgecrest, California earthquake sequence.Tectonophysics,791.
MLA	Pope N.,et al."Coulomb stress models for the 2019 Ridgecrest, California earthquake sequence".Tectonophysics 791(2020).