globalchange  > 气候变化与战略
DOI: 10.1016/j.epsl.2020.116695
论文题名:
Geometrically controlled slow slip enhanced by seismic waves: A mechanism for delayed triggering
作者: Blank D.; Morgan J.; Caniven Y.
刊名: Earth and Planetary Science Letters
ISSN: 0012821X
出版年: 2021
卷: 554
语种: 英语
中文关键词: delayed dynamic triggering ; earthquakes ; numerical modeling ; slow slip
英文关键词: Earthquakes ; Seismic waves ; Active fault ; High-resolution monitoring ; Physical mechanism ; Slow slip events ; Surrounding materials ; Transient stress ; Triggering model ; Warning signs ; Fault slips ; active fault ; computer simulation ; crustal structure ; deformation mechanism ; earthquake mechanism ; fault slip ; fault zone ; numerical model ; seismic wave ; slip rate ; stress change ; structural control ; trigger mechanism ; wave generation
英文摘要: Seismic waves generated during earthquakes induce transient stress changes in the crust. These ephemeral perturbations can trigger critically stressed asperities at remote distances, often with significant time delays. The physical mechanism that governs this phenomenon is not completely resolved. Numerical simulations of dynamic perturbations passing along a heterogeneous pre-stressed fault, demonstrate that weak portions of the fault that host ongoing slow slip can transfer stress in response to the perturbations, loading asperities poised for failure. We find that the magnitude of perturbation, the state of the asperity, as well as deformation of the surrounding material, jointly control the delay time between perturbation and triggered event. The slow-slip modulated delayed triggering model that we propose can account for the wide range of observed delay times in nature, including the two end-member cases of no delay and no triggering. Triggered slow slip events in nature might provide warning signs of impending earthquakes, underscoring the importance of high-resolution monitoring of active fault zones. © 2020 Elsevier B.V.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/165414
Appears in Collections:气候变化与战略

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作者单位: Rice University, 6100 Main Street, Houston, TX 77005, United States; University of Montpellier, CNRS France, 641 Av. Du Doyen Gaston Giraud, Montpellier, 34000, France

Recommended Citation:
Blank D.,Morgan J.,Caniven Y.. Geometrically controlled slow slip enhanced by seismic waves: A mechanism for delayed triggering[J]. Earth and Planetary Science Letters,2021-01-01,554
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