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DOI | 10.1029/2019GL084315 |
Transient Brittle-Ductile Transition Depth Induced by Moderate-Large Earthquakes in Southern and Baja California | |
Cheng, Yifang; Ben-Zion, Yehuda | |
2019-10-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS
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ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2019 |
文章类型 | Article;Early Access |
语种 | 英语 |
国家 | USA |
英文摘要 | We analyze space-time variations in the depth distribution of seismicity in Southern and Baja California, focusing on transients following four M >= 6.7 mainshocks. The regular brittle-ductile transition depth is estimated at different locations as the local bottom of 99,636 background events and is compared with the bottom of events within earthquake clusters. The four M >= 6.7 mainshock-aftershock sequences exhibit early aftershocks with depths up to 5 km below the regular brittle-ductile transition depth and epicentral distances up to 15 km from the mainshock ruptures. The maximum aftershock depth increases abruptly following the mainshocks and recovers to the background level after several years. The wide-spread deeper-than-usual early aftershocks favor classical brittle-ductile transition over change from unstable to stable frictional response as the mechanism governing the base of the seismogenic zone. Episodic transient deepening of the brittle-ductile transition following major earthquakes can have important long-term effects on the lower crust. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000492819500001 |
WOS关键词 | SEISMOGENIC ZONE ; 1992 LANDERS ; LOWER CRUST ; SLIP ; SEISMICITY ; STRENGTH ; RUPTURE ; CREEP ; PSEUDOTACHYLYTES ; RHEOLOGY |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/187808 |
专题 | 气候变化 |
作者单位 | Univ Southern Calif, Dept Earth Sci, Los Angeles, CA 90007 USA |
推荐引用方式 GB/T 7714 | Cheng, Yifang,Ben-Zion, Yehuda. Transient Brittle-Ductile Transition Depth Induced by Moderate-Large Earthquakes in Southern and Baja California[J]. GEOPHYSICAL RESEARCH LETTERS,2019. |
APA | Cheng, Yifang,&Ben-Zion, Yehuda.(2019).Transient Brittle-Ductile Transition Depth Induced by Moderate-Large Earthquakes in Southern and Baja California.GEOPHYSICAL RESEARCH LETTERS. |
MLA | Cheng, Yifang,et al."Transient Brittle-Ductile Transition Depth Induced by Moderate-Large Earthquakes in Southern and Baja California".GEOPHYSICAL RESEARCH LETTERS (2019). |
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