| DOI: | 10.1016/j.tecto.2020.228555
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| 论文题名: | Coulomb stress models for the 2019 Ridgecrest, California earthquake sequence |
| 作者: | Pope N.; Mooney W.D.
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| 刊名: | Tectonophysics
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| ISSN: | 00401951
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| 出版年: | 2020
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| 卷: | 791 | | 语种: | 英语
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| 中文关键词: | 2019 Ridgecrest earthquake
; California earthquake
; Coulomb stress
; Earthquake sequence
; Garlock fault
; Owens Valley fault
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| 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
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| 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 |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/170683
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| Appears in Collections: | 气候变化与战略
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作者单位: | U.S. Geological Survey, Earthquake Science Center, 345 Middlefield Rd, Menlo Park, CA 94025, United States
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| Recommended Citation: | |
Pope N.,Mooney W.D.. Coulomb stress models for the 2019 Ridgecrest, California earthquake sequence[J]. Tectonophysics,2020-01-01,791
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