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| DOI | 10.1029/2020GL090025 |
| Dual Seismic Migration Velocities in Seismic Swarms | |
| Dublanchet P.; De Barros L. | |
| 发表日期 | 2021 |
| ISSN | 0094-8276 |
| 卷号 | 48期号:1 |
| 英文摘要 | Fluid-induced earthquake sequences generally appear as expanding swarms activating a particular fault. The recent analysis of a swarm in the Corinth rift has revealed a dual migration pattern, with a global slow expansion (m day−1) and episodes of rapid migration (km day−1). Such swarms are generally interpreted as fluid diffusion, which ignores the possibility of static, dynamic, or aseismic triggering and the existence of rapid migration. Here, we propose a new model for such swarms, where earthquakes consist in the failure of asperities on a creeping fault infiltrated by fluid. For that, we couple rate-and-state friction, nonlinear diffusivity, and elasticity along a 1D interface. This model reproduces the dual migration speeds observed in real swarms. We show that migration speeds increase linearly with the mean pressurization and are not dependent on the hydraulic diffusivity, as traditionally suggested. © 2020. American Geophysical Union. All Rights Reserved. |
| 英文关键词 | Earthquakes; Faulting; Interface states; Creeping faults; Earthquake sequences; Fluid diffusion; Hydraulic diffusivity; Migration patterns; Non-linear diffusivity; Rate and state friction; Seismic migration; Diffusion in liquids |
| 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/169238 |
| 作者单位 | MINES ParisTech, PSL Research University, Centre de Géosciences, Fontainebleau, France; Université Côte d’Azur, CNRS, OCA, IRD, Géoazur, Sophia Antipolis, Valbonne, France |
| 推荐引用方式 GB/T 7714 | Dublanchet P.,De Barros L.. Dual Seismic Migration Velocities in Seismic Swarms[J],2021,48(1). |
| APA | Dublanchet P.,&De Barros L..(2021).Dual Seismic Migration Velocities in Seismic Swarms.Geophysical Research Letters,48(1). |
| MLA | Dublanchet P.,et al."Dual Seismic Migration Velocities in Seismic Swarms".Geophysical Research Letters 48.1(2021). |
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