DOI: 10.1002/2015GL064578
论文题名: Background seismicity rate at subduction zones linked to slab-bending-related hydration
作者: Nishikawa T. ; Ide S.
刊名: Geophysical Research Letters
ISSN: 0094-9355
EISSN: 1944-9086
出版年: 2015
卷: 42, 期: 17 起始页码: 7081
结束页码: 7089
语种: 英语
英文关键词: background seismicity rate
; ETAS model
; hydration
; slab-bending-related faults
Scopus关键词: Analytical geochemistry
; Earthquakes
; Faulting
; Earthquake occurrences
; Epidemic-type aftershock sequences
; ETAS models
; Fluid distribution
; Fluid sources
; Plate interfaces
; Pore fluid pressure
; Subduction zones
; Hydration
; aftershock
; fault
; plate tectonics
; pore pressure
; seismicity
; slab
; subduction
; tectonic plate
英文摘要: Tectonic properties strongly control variations in seismicity among subduction zones. In particular, fluid distribution in subduction zones influences earthquake occurrence, and it varies among subduction zones due to variations in fluid sources such as hydrated oceanic plates. However, the relationship between variations in fluid distribution and variations in seismicity among subduction zones is unclear. Here we divide Earth's subduction zones into 111 regions and estimate background seismicity rates using the epidemic type aftershock sequence model. We demonstrate that background seismicity rate correlates to the amount of bending of the incoming oceanic plate, which in turn is related to the hydration of oceanic plates via slab-bending-related faults. Regions with large bending may have high-seismicity rates because a strongly hydrated oceanic plate causes high pore fluid pressure and reduces the strength of the plate interface. We suggest that variations in fluid distribution can also cause variations in seismicity in subduction zones. ©2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84943366195&doi=10.1002%2f2015GL064578&partnerID=40&md5=945aa1467941c9e79ee25bc70f6b4592
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8970
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Department of Earth and Planetary Science, University of Tokyo, Tokyo, Japan
Recommended Citation:
Nishikawa T.,Ide S.. Background seismicity rate at subduction zones linked to slab-bending-related hydration[J]. Geophysical Research Letters,2015-01-01,42(17).