气候变化领域集成服务门户(CCPortal): Slow Earthquakes Illuminating Interplate Coupling Heterogeneities in Subduction Zones

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DOI	10.1029/2020GL088089
	Slow Earthquakes Illuminating Interplate Coupling Heterogeneities in Subduction Zones
	Baba S.; Takemura S.; Obara K.; Noda A.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:14
英文摘要	Slow earthquakes are mainly distributed in the vicinity of seismogenic zones of megathrust earthquakes and relationships between both types of earthquakes are expected. We examined the activity of very low frequency earthquakes (VLFEs), classified as one type of slow earthquake, around Japan because they have the potential to clarify detailed spatiotemporal slip behaviors at the plate boundaries. The distribution of the shallow VLFE activity rate is heterogeneous along trench axes and exhibits an anticorrelation relationship with the spatial distribution of the interplate coupling ratio, whereas deep VLFEs are distributed only in weakly coupled areas, and the spatial variation of the activity rate is small. Furthermore, VLFEs are mainly hosted by low seismic velocity anomalies. Thus, slow earthquakes can be triggered by decreased effective stress due to the high pore fluid pressure within regions with weak interplate coupling, and their activity can be an indicator of interplate slip behavior. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Spatial distribution; Interplate coupling; Megathrust earthquakes; Pore fluid pressure; Seismic velocities; Seismogenic zones; Spatial variations; Subduction zones; Very low frequency; Earthquakes; earthquake event; effective stress; heterogeneity; plate boundary; seismic velocity; spatial distribution; spatial variation; spatiotemporal analysis; subduction zone; Japan
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/170115
作者单位	Earthquake Research Institute, the University of Tokyo, Tokyo, Japan; Earthquake and Tsunami Research Division, National Research Institute for Earth Science and Disaster Resilience, Tsukuba, Japan
推荐引用方式 GB/T 7714	Baba S.,Takemura S.,Obara K.,et al. Slow Earthquakes Illuminating Interplate Coupling Heterogeneities in Subduction Zones[J],2020,47(14).
APA	Baba S.,Takemura S.,Obara K.,&Noda A..(2020).Slow Earthquakes Illuminating Interplate Coupling Heterogeneities in Subduction Zones.Geophysical Research Letters,47(14).
MLA	Baba S.,et al."Slow Earthquakes Illuminating Interplate Coupling Heterogeneities in Subduction Zones".Geophysical Research Letters 47.14(2020).