DOI: 10.1002/2013GL058751
论文题名: Observed change in plate coupling close to the rupture initiation area before the occurrence of the 2011 Tohoku earthquake: Implications from an earthquake cycle model
作者: Ohtani M. ; Hirahara K. ; Hori T. ; Hyodo M.
刊名: Geophysical Research Letters
ISSN: 0094-10261
EISSN: 1944-9992
出版年: 2014
卷: 41, 期: 6 起始页码: 1899
结束页码: 1906
语种: 英语
英文关键词: 2011 Tohoku earthquake
; earthquake cycle
; off Fukushima
; simulation
Scopus关键词: Computer simulation
; Indium plating
; 2011 tohoku earthquakes
; Asperity model
; Coseismic slips
; Earthquake cycles
; Fukushima
; Recurrence time
; simulation
; Tohoku earthquakes
; Earthquakes
; coseismic process
; earthquake magnitude
; earthquake rupture
; foreshock
; GPS
; numerical model
; plate tectonics
; slip
; Tohoku earthquake 2011
; Fukushima
; Honshu
; Japan
; Tohoku
英文摘要: Changes in plate coupling off the coast of Fukushima have been detected by GPS since 2000. These changes occurred close to the rupture initiation area of the Mw9.0 2011 Tohoku earthquake and possibly initiated the earthquake. We investigated these changes with quasi-dynamic earthquake cycle simulations using a hierarchical asperity model. We modeled the entire rupture region as rate weakening but conditionally stable, while areas with huge slips and Mw7 asperities were modeled as strong and ordinary rate-weakening unstable friction, respectively. The following observed characteristics were reproduced: long recurrence time, large rupture region (including a localized huge coseismic slip area and source area of recurring Mw7 earthquakes), and a Mw7 foreshock triggering the Tohoku earthquake. Off Fukushima, repeated aseismic slips propagating northward appeared in the last half of the cycle and possibly caused the decrease in plate coupling. However, it is not necessarily related to the immediate occurrence of the giant earthquake. © 2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84898926645&doi=10.1002%2f2013GL058751&partnerID=40&md5=4e0690a72983d575f9f9b89fa98520e1
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7525
Appears in Collections: 气候减缓与适应
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作者单位: Graduate School of Science, Kyoto University, Kyoto, Japan
Recommended Citation:
Ohtani M.,Hirahara K.,Hori T.,et al. Observed change in plate coupling close to the rupture initiation area before the occurrence of the 2011 Tohoku earthquake: Implications from an earthquake cycle model[J]. Geophysical Research Letters,2014-01-01,41(6).