DOI: 10.1016/j.epsl.2017.12.006
Scopus记录号: 2-s2.0-85038211877
论文题名: Shallow megathrust earthquake ruptures betrayed by their outer-trench aftershocks signature
作者: Sladen A. ; Trevisan J.
刊名: Earth and Planetary Science Letters
ISSN: 0012821X
出版年: 2018
卷: 483 起始页码: 105
结束页码: 113
语种: 英语
英文关键词: aftershocks
; earthquake
; finite-fault
; outer-rise
; subduction
; triggering
Scopus关键词: Earthquake effects
; Faulting
; Geophysics
; Imaging techniques
; Underwater imaging
; Aftershock sequence
; aftershocks
; Megathrust earthquakes
; outer-rise
; Physical conditions
; subduction
; Subduction earthquakes
; triggering
; Earthquakes
; aftershock
; coseismic process
; earthquake rupture
; earthquake trigger
; fault slip
; subduction
; trench
英文摘要: For some megathrust earthquakes, the rupture extends to the solid Earth's surface, at the ocean floor. This unexpected behaviour holds strong implications for the tsunami potential of subduction zones and for the physical conditions governing earthquakes, but such ruptures occur in underwater areas which are hard to observe, even with current instrumentation and imaging techniques. Here, we evidence that aftershocks occurring ocean-ward from the trench are conditioned by near-surface rupture of the megathrust fault. Comparison to well constrained earthquake slip models further reveals that for each event the number of aftershocks is proportional to the amount of shallow slip, a link likely related to static stress transfer. Hence, the spatial distribution of these specific aftershock sequences could provide independent constrains on the coseismic shallow slip of future events. It also offers the prospect to be able to reassess the rupture of many large subduction earthquakes back to the beginning of the instrumental era. © 2017 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/110091
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
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作者单位: Université Côte d'Azur, CNRS, IRD, Observatoire de la Côte d'Azur, Géoazur UMR 7329, 250 rue Albert Einstein, Sophia-Antipolis, Valbonne, 06560, France
Recommended Citation:
Sladen A.,Trevisan J.. Shallow megathrust earthquake ruptures betrayed by their outer-trench aftershocks signature[J]. Earth and Planetary Science Letters,2018-01-01,483