气候变化领域集成服务门户(CCPortal): Deep slow-slip events promote seismicity in northeastern Japan megathrust

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DOI	10.1016/j.epsl.2020.116261
	Deep slow-slip events promote seismicity in northeastern Japan megathrust
	Khoshmanesh M.; Shirzaei M.; Uchida N.
发表日期	2020
ISSN	0012821X
卷号	540
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)
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
语种	英语
来源期刊	Earth and Planetary Science Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/202698
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
推荐引用方式 GB/T 7714	Khoshmanesh M.,Shirzaei M.,Uchida N.. Deep slow-slip events promote seismicity in northeastern Japan megathrust[J],2020,540.
APA	Khoshmanesh M.,Shirzaei M.,&Uchida N..(2020).Deep slow-slip events promote seismicity in northeastern Japan megathrust.Earth and Planetary Science Letters,540.
MLA	Khoshmanesh M.,et al."Deep slow-slip events promote seismicity in northeastern Japan megathrust".Earth and Planetary Science Letters 540(2020).