DOI: 10.1016/j.epsl.2020.116261
论文题名: Deep slow-slip events promote seismicity in northeastern Japan megathrust
作者: Khoshmanesh M. ; Shirzaei M. ; Uchida N.
刊名: Earth and Planetary Science Letters
ISSN: 0012821X
出版年: 2020
卷: 540 语种: 英语
中文关键词: earthquake triggering
; GPS
; Japan subduction zone
; kinematic modeling
; repeating earthquakes
; slow-slip events
英文关键词: Geodesy
; Episodic slow slips
; Inter-seismic periods
; Seismic observation
; Seismogenic zones
; Sliding movements
; Slow slip events
; Subduction zones
; Triggering mechanism
; Earthquakes
; earthquake trigger
; episodic event
; seismic hazard
; seismicity
; slip rate
; subduction zone
; Japan
英文摘要: The sliding movement between oceanic and crustal plates in subduction zones is accommodated through both earthquakes and quasi-static or transient aseismic slip. On northeastern Japan megathrust, aseismic transients, known as slow-slip events, are suggested to precede and trigger major earthquakes in their immediate surroundings. However, the geodetic evidence for these episodic slow-slip events, as well as their link to the seismicity on neighboring locked segments of the megathrust, is missing. Here, we combine the on-shore geodetic data set with seismic observations during the interseismic period of 1996–2003 and demonstrate that episodic slow-slip events are prevalent across the down-dip portion (∼30–70 km depth) of the megathrust and the associated stress changes modulate the seismicity rate on the neighboring seismogenic zone. Consequently, small- to moderate-size earthquakes are periodically triggered, whose interaction through a domino effect might occasionally lead to major earthquakes. This observation has a profound impact on the estimation of seismic hazard in the region, introducing a new triggering mechanism that acts across the megathrust to the extent that has not been acknowledged before. © 2020 The Author(s) Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/165076
Appears in Collections: 气候变化与战略
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作者单位: Department of Mechanical and Civil Engineering, California Institute of Technology, Pasadena, CA, United States; School of Earth and Space Exploration, Arizona State University, Tempe, AZ, United States; Graduate School of Science, Tohoku University, Sendai, Japan
Recommended Citation:
Khoshmanesh M.,Shirzaei M.,Uchida N.. Deep slow-slip events promote seismicity in northeastern Japan megathrust[J]. Earth and Planetary Science Letters,2020-01-01,540