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DOI | 10.1002/2016GL071700 |
Fault roughness and strength heterogeneity control earthquake size and stress drop | |
Zielke, O.; Galis, M.; Mai, P. M. | |
2017-01-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2017 |
卷号 | 44期号:2 |
文章类型 | Article |
语种 | 英语 |
国家 | Saudi Arabia |
英文摘要 | An earthquake's stress drop is related to the frictional breakdown during sliding and constitutes a fundamental quantity of the rupture process. High-speed laboratory friction experiments that emulate the rupture process imply stress drop values that greatly exceed those commonly reported for natural earthquakes. We hypothesize that this stress drop discrepancy is due to fault-surface roughness and strength heterogeneity: an earthquake's moment release and its recurrence probability depend not only on stress drop and rupture dimension but also on the geometric roughness of the ruptured fault and the location of failing strength asperities along it. Using large-scale numerical simulations for earthquake ruptures under varying roughness and strength conditions, we verify our hypothesis, showing that smoother faults may generate larger earthquakes than rougher faults under identical tectonic loading conditions. We further discuss the potential impact of fault roughness on earthquake recurrence probability. This finding provides important information, also for seismic hazard analysis. |
英文关键词 | stress drop fault strength heterogeneity earthquake size earthquake recurrence |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000395652600022 |
WOS关键词 | RUPTURE ; SLIP ; EVOLUTION ; SURFACE |
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/28008 |
专题 | 气候变化 |
作者单位 | King Abdullah Univ Sci & Technol, Dept Earth Sci & Engn, Thuwal, Saudi Arabia |
推荐引用方式 GB/T 7714 | Zielke, O.,Galis, M.,Mai, P. M.. Fault roughness and strength heterogeneity control earthquake size and stress drop[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(2). |
APA | Zielke, O.,Galis, M.,&Mai, P. M..(2017).Fault roughness and strength heterogeneity control earthquake size and stress drop.GEOPHYSICAL RESEARCH LETTERS,44(2). |
MLA | Zielke, O.,et al."Fault roughness and strength heterogeneity control earthquake size and stress drop".GEOPHYSICAL RESEARCH LETTERS 44.2(2017). |
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