DOI: 10.1002/grl.50153
论文题名: Effect of the largest foreshock (Mw 7.3) on triggering the 2011 Tohoku earthquake (Mw 9.0)
作者: Gusman A.R. ; Fukuoka M. ; Tanioka Y. ; Sakai S.
刊名: Geophysical Research Letters
ISSN: 0094-9345
EISSN: 1944-9076
出版年: 2013
卷: 40, 期: 3 起始页码: 497
结束页码: 500
语种: 英语
英文关键词: Coulomb stress change
; foreshock
; slip distribution
; tsunami waveforms
Scopus关键词: Tsunamis
; 2011 tohoku earthquakes
; Coulomb stress changes
; Dynamic ruptures
; foreshock
; Plate interfaces
; Slip distribution
; Wave forms
; Waveform inversion
; Earthquakes
; Coulomb criterion
; earthquake trigger
; foreshock
; rupture
; seismic moment
; slip
; Tohoku earthquake 2011
; waveform analysis
英文摘要: The slip distribution of the largest foreshock that occurred 2 days before the mainshock of the 2011 Tohoku earthquake is estimated by tsunami waveform inversion. The major slip region was located on the down-dip side of the hypocenter, and the slip amounts ranged from 0.6 to 1.5 m. By assuming the rigidity of 4 × 1010 N m-2, the seismic moment calculated from the slip distribution is 1.2 × 1020 N m (Mw 7.3). The slip distribution suggests that the largest foreshock did not rupture the plate interface where the dynamic rupture of the mainshock was initiated. The largest foreshock increased the Coulomb stress (1.6-4.5 bars) on the plate interface around the hypocenter of the mainshock. This indicates that the 2011 Tohoku earthquake was brought closer to failure by the largest foreshock. Key Points The 9 March 2011 earthquake slip is estimated from tsunami waveforms Slip amounts on the major slip region range from 0.6 to 1.5 m The foreshocks leads to the rupture of the mainshock ©2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84878166356&doi=10.1002%2fgrl.50153&partnerID=40&md5=b9812fa8a6563fdb339f8c542ddcc00d
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6609
Appears in Collections: 气候减缓与适应
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作者单位: Institute of Seismology and Volcanology, Hokkaido University, Sapporo, Hokkaido, Japan
Recommended Citation:
Gusman A.R.,Fukuoka M.,Tanioka Y.,et al. Effect of the largest foreshock (Mw 7.3) on triggering the 2011 Tohoku earthquake (Mw 9.0)[J]. Geophysical Research Letters,2013-01-01,40(3).