DOI: 10.1002/2014GL061763
论文题名: Fluid-driven seismicity activation in northern Nagano region after the 2011 M9.0 Tohoku-oki earthquake
作者: Shimojo K. ; Enescu B. ; Yagi Y. ; Takeda T.
刊名: Geophysical Research Letters
ISSN: 0094-9653
EISSN: 1944-9384
出版年: 2014
卷: 41, 期: 21 起始页码: 7524
结束页码: 7531
语种: 英语
英文关键词: earthquake triggering
; inland seismicity
; physical mechanism
; Tohoku-oki megaquake
Scopus关键词: Chemical activation
; Dynamics
; Surface waves
; Activation patterns
; Earthquake triggering
; inland seismicity
; Japan meteorological agencies
; Physical mechanism
; Tohoku-Oki earthquakes
; Tohoku-oki megaquake
; Wave-form detection
; Earthquakes
; earthquake epicenter
; earthquake event
; geothermal system
; seismicity
; shock wave
; stress change
; waveform analysis
; Chubu
; Honshu
; Japan
; Japan
; Nagano
英文摘要: The dynamic triggering of earthquakes is well documented; however, the underlying physical mechanisms remain obscure. Here we analyze the seismicity in northern Nagano, central Japan, following the Tohoku-oki quake, until the occurrence 13 h later of an Mw 6.2 local earthquake. We use waveform detection techniques to identify 17 times more earthquakes than those in the Japan Meteorological Agency catalog. The activation of seismicity in the epicentral region of the Mw 6.2 event is weak and delayed, culminating with the occurrence of the moderate shock preceded by two small foreshocks. The seismicity activation to the south is shallower, abundant, and starts during the passage of Tohoku-oki surface waves of high dynamic stresses. The early activation occurs in areas of relatively high near-surface fluid temperature, indicating that the dynamic triggering is likely caused by excitation of geothermal crustal fluids. The Mw 6.2 Northern Nagano earthquake might have been delay-triggered by fluid migration from a deep source. Key Points Immediate and delayed inland earthquake activation after Tohoku-oki megathrustSeismicity induced by dynamic stress changes through excitation of geofluidsEarthquake activation pattern correlates with crustal fluid properties ©2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84912128197&doi=10.1002%2f2014GL061763&partnerID=40&md5=2a57b6dc2f633a83831f78a513096c70
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6917
Appears in Collections: 气候减缓与适应
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作者单位: Graduate School of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Japan
Recommended Citation:
Shimojo K.,Enescu B.,Yagi Y.,et al. Fluid-driven seismicity activation in northern Nagano region after the 2011 M9.0 Tohoku-oki earthquake[J]. Geophysical Research Letters,2014-01-01,41(21).