| DOI: | 10.1002/2015GL066069
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| 论文题名: | Long-term acceleration of aseismic slip preceding the Mw 9 Tohoku-oki earthquake: Constraints from repeating earthquakes |
| 作者: | Mavrommatis A.P.; Segall P.; Uchida N.; Johnson K.M.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-8393
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| EISSN: | 1944-8124
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| 出版年: | 2015
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| 卷: | 42, 期:22 | | 起始页码: | 9717
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| 结束页码: | 9725
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| 语种: | 英语
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| 英文关键词: | repeating earthquakes
; Tohoku earthquake
; transient slip
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| Scopus关键词: | Geodetic satellites
; Geophysics
; Joint inversion
; Megathrust
; Recurrence intervals
; Repeating earthquake
; Rupture zone
; Seismicity data
; Tohoku earthquakes
; Tohoku-Oki earthquakes
; Earthquakes
; data interpretation
; decadal variation
; deformation mechanism
; earthquake magnitude
; earthquake recurrence
; earthquake rupture
; geodesy
; GPS
; long-term change
; seismic data
; slip rate
; spatiotemporal analysis
; thrust
; Tohoku earthquake 2011
; Japan Trench
; Pacific Ocean
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| 英文摘要: | A decadal-scale deformation transient preceding the 2011 Mw 9 Tohoku-oki, Japan, earthquake was reported from continuous GPS data and interpreted as accelerating aseismic slip on the Japan Trench megathrust. Given the unprecedented nature of this transient, independent confirmation of accelerating slip is required. Here we show that changes in the recurrence intervals of repeating earthquakes on the Japan Trench megathrust in the period 1996 to 2011 are consistent with accelerating slip preceding the Tohoku-oki earthquake. All sequences of repeating earthquakes with statistically significant trends in recurrence interval (at 95% confidence) offshore south central Tohoku occurred at an accelerating rate. Furthermore, estimates of the magnitude of slip acceleration from repeating earthquakes are consistent with the completely independent geodetic estimates. From a joint inversion of the GPS and seismicity data, we infer that a substantial portion of the megathrust experienced accelerating slip, partly surrounding the eventual rupture zone of the Mw 9 earthquake. Key Points Independent confirmation of long-term transient slip event preceding the Mw 9 Tohoku-oki earthquake Repeating earthquakes during 1996-2011 occurred at an accelerated rate near the Mw 9 source area Consistent estimates of slip acceleration are inferred from independent geodetic and seismicity data. © 2015. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84956890722&doi=10.1002%2f2015GL066069&partnerID=40&md5=8c5f7f349e85f590dd1f368858865948
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| Citation statistics: |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/8009
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| 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 Geophysics, Stanford University, Stanford, CA, United States
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| Recommended Citation: | |
Mavrommatis A.P.,Segall P.,Uchida N.,et al. Long-term acceleration of aseismic slip preceding the Mw 9 Tohoku-oki earthquake: Constraints from repeating earthquakes[J]. Geophysical Research Letters,2015-01-01,42(22).
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