| DOI: | 10.1002/grl.50634
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| 论文题名: | High-speed rupture in the first 20 s of the 2011 Tohoku earthquake, Japan |
| 作者: | Uchide T.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-8910
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| EISSN: | 1944-8641
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| 出版年: | 2013
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| 卷: | 40, 期:12 | | 起始页码: | 2993
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| 结束页码: | 2997
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| 语种: | 英语
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| 英文关键词: | foreshocks
; initial rupture process
; multiscale slip inversion analysis
; The 2011 Tohoku earthquake
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| Scopus关键词: | 2011 tohoku earthquakes
; Dynamic ruptures
; foreshocks
; Inversion analysis
; Rupture process
; Rupture propagation
; Rupture velocities
; Tohoku earthquakes
; Earth sciences
; Geophysics
; Earthquakes
; coseismic process
; earthquake rupture
; foreshock
; slip
; Tohoku earthquake 2011
; tsunami
; Japan
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| 英文摘要: | The 2011 Tohoku earthquake produced tens of meters of fault slip near the Japan Trench, which generated devastating tsunami. The rupture process before the huge slip is still unclear due to a lack of resolution. Here I perform a multiscale slip inversion analysis to examine the first 10 and 20 s of the rupture process and the whole rupture process at different scales. The result shows that 4 s after the initiation, this earthquake started with a relatively high-speed rupture that had a peak slip rate faster than 1 m/s and a rupture velocity comparable to 3 km/s. Fourteen seconds after the initiation, the rupture propagation direction changed from northward to westward, near the edge of the M 7.3 foreshock coseismic slip area. The stress release by the foreshock may contribute to the complex small-scale rupture propagation, which may appear to be slow rupture propagation when only looking at long-period data. Key Points A multiscale slip inversion for the initial process of the Tohoku earthquake The Tohoku earthquake started with a dynamic rupture, not a slow rupture A complex rupture propagation pattern in the first 20 s ©2013. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84880541376&doi=10.1002%2fgrl.50634&partnerID=40&md5=bd435ab87f1fba590d6770974db6a0b1
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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/6174
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| Appears in Collections: | 气候减缓与适应
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作者单位: | Disaster Prevention Research Institute, Kyoto University Kyoto, Uji, Japan
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| Recommended Citation: | |
Uchide T.. High-speed rupture in the first 20 s of the 2011 Tohoku earthquake, Japan[J]. Geophysical Research Letters,2013-01-01,40(12).
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