DOI: 10.1002/2014GL060139
论文题名: A decadal-scale deformation transient prior to the 2011 Mw 9.0 Tohoku-oki earthquake
作者: Mavrommatis A.P. ; Segall P. ; Johnson K.M.
刊名: Geophysical Research Letters
ISSN: 0094-10000
EISSN: 1944-9731
出版年: 2014
卷: 41, 期: 13 起始页码: 4486
结束页码: 4494
语种: 英语
英文关键词: Tohoku earthquake
; transient deformation
Scopus关键词: Acceleration
; Deformation
; Time series
; Transients
; 2011 Tohoku-Oki earthquakes
; Constant acceleration
; Non-linear trends
; Plate interfaces
; Postseismic deformation
; Tohoku earthquakes
; Tohoku-Oki earthquakes
; Transient deformation
; Earthquakes
英文摘要: GPS time series in northeast Japan exhibit nonlinear trends from 1996 to 2011 before the Mw 9.0, 2011 Tohoku-oki earthquake. After removing reference frame noise, we model time series as linear trends plus constant acceleration, correcting for coseismic and postseismic effects from the numerous Mw ∼ 6.5+ earthquakes during this period. We find spatially coherent and statistically significant accelerations throughout northern Honshu. Large areas of Japan outside the Tohoku region show insignificant accelerations, demonstrating that the observation is not due to network-wide artifacts. While the accelerations in northern Tohoku (Sanriku area) can be explained by decaying postseismic deformation from pre-1996 earthquakes, the accelerations in south-central Tohoku appear unrelated to postseismic effects. The latter accelerations are associated with a decrease in average trench-normal strain rate and can be explained by increasing slip rate on the Japan trench plate interface and/or updip migration of deep aseismic slip in the decades before the 2011 Tohoku-oki earthquake. Key Points Spatially coherent and significant deformation transients in the Tohoku region Transients in south-central Tohoku cannot be explained by afterslip Increasing slip rate and updip migration of deep slip before the M 9 Tohoku event ©2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84904082067&doi=10.1002%2f2014GL060139&partnerID=40&md5=a1091123294d8ffa0f9ab56a70df13bf
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7264
Appears in Collections: 气候减缓与适应
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作者单位: Department of Geophysics, Stanford University, Stanford CA, United States
Recommended Citation:
Mavrommatis A.P.,Segall P.,Johnson K.M.. A decadal-scale deformation transient prior to the 2011 Mw 9.0 Tohoku-oki earthquake[J]. Geophysical Research Letters,2014-01-01,41(13).