DOI: 10.1002/2014GL062986
论文题名: Episodic tremor and slip near the Japan Trench prior to the 2011 Tohoku-Oki earthquake
作者: Ito Y. ; Hino R. ; Suzuki S. ; Kaneda Y.
刊名: Geophysical Research Letters
ISSN: 0094-8877
EISSN: 1944-8608
出版年: 2015
卷: 42, 期: 6 起始页码: 1725
结束页码: 1731
语种: 英语
英文关键词: 2011 Tohoku-Oki earthquake
; episodic tremor and slip
; ocean bottom seismometer
; subduction zone
Scopus关键词: Seismographs
; Seismology
; 2011 Tohoku-Oki earthquakes
; Earthquake physics
; episodic tremor and slip
; Large earthquakes
; Low frequency tremors
; Ocean bottom seismometer
; Plate boundaries
; Subduction zones
; Earthquakes
; coseismic process
; deformation
; earthquake
; frequency analysis
; slip rate
; subduction zone
; thrust
; Japan Trench
; Pacific Ocean
英文摘要: Change in the rates of aseismic deformation prior to large earthquakes is a major area of interest in earthquake physics. Here we present evidence that episodic tremor and slip occurred in the shallow subduction zone within the source region of the 2011 Tohoku-Oki earthquake prior to the main shock. Ocean bottom seismometers near the Japan Trench recorded some excitations in amplitude of ambient noise level accompanying both the 2008 and 2011 slow slip events. The observed signals show that low frequencies of 5-8Hz dominated, suggesting that the excitations were due to small low-frequency tremors accompanying the slow slip events. The largest amplitude tremor was observed just before the 2011 event. The estimated sources of tremors were possibly distributed within the coseismic slip area of the 2011 event, suggesting the shallow plate-boundary thrust near the trench is a general location of slow earthquakes. Key Points Tremor signal accompanied slow slip event Tremor activity accelerated before the 2011 Tohoku-Oki earthquake Possible tremor source located near the trench within coseismic slip area ©2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84927720446&doi=10.1002%2f2014GL062986&partnerID=40&md5=f5a7b36b97e1ac83d28021eb8b79bed2
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8493
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: Disaster Prevention Research Institute, Kyoto University, Uji, Japan
Recommended Citation:
Ito Y.,Hino R.,Suzuki S.,et al. Episodic tremor and slip near the Japan Trench prior to the 2011 Tohoku-Oki earthquake[J]. Geophysical Research Letters,2015-01-01,42(6).