DOI: 10.1002/grl.50888
论文题名: Characteristics of a tsunamigenic megasplay fault in the Nankai Trough
作者: Yamada Y. ; Masui R. ; Tsuji T.
刊名: Geophysical Research Letters
ISSN: 0094-8602
EISSN: 1944-8333
出版年: 2013
卷: 40, 期: 17 起始页码: 4594
结束页码: 4598
语种: 英语
英文关键词: IODP
; megasplay fault
; Nankai Trough
; three-dimensional fault geometry
; tsunami
Scopus关键词: Fault geometry
; IODP
; Local heterogeneity
; Nankai troughs
; Roughness distributions
; Scientific drilling
; Thickness variation
; Three dimensional geometry
; Geometry
; Three dimensional
; Tsunamis
; Faulting
; data set
; dip
; drilling
; fault
; fault slip
; hazard
; plate boundary
; seismic data
; subduction
; thrust
; trough
; tsunami
; Nankai Trough
; Pacific Ocean
英文摘要: Slip on the shallow part of a megasplay fault that is an out-of-sequence thrust and branch of the main subduction plate boundary can cause devastating tsunamis after earthquakes. We analyzed the three-dimensional geometry, including dip amount and azimuths, roughness distributions, and thickness variations, of the shallow part of a megasplay fault in the Nankai Trough using a three-dimensional seismic data set. The fault is divided into three zones based on its geometry: thick, smooth, and simply convex in the east; complexly curved in the middle; and thin and kinked in the west. Results of scientific drilling indicate that the eastern region of the fault is most active, and local heterogeneities in fault geometry, including roughness and thickness, may control the slip on this part of the fault. The present findings can be used to evaluate the risk of future tsunamis arising from movement on shallow thrust faults at subduction margins. Key Points Slip on the shallow part of a fault is responsible for devastating tsunamis A smooth geometry of a shallow fault may result in higher tsunami potential The detailed geometry of shallow fault can be used to assess tsunami hazard ©2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84883596684&doi=10.1002%2fgrl.50888&partnerID=40&md5=b8ae1028f93fc7abc22c3cbc5133935e
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/5866
Appears in Collections: 气候减缓与适应
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作者单位: Department of Earth Resources Engineering, Kyoto University, Graduate School of Engineering, Katsura, Kyoto 615-8540, Japan
Recommended Citation:
Yamada Y.,Masui R.,Tsuji T.. Characteristics of a tsunamigenic megasplay fault in the Nankai Trough[J]. Geophysical Research Letters,2013-01-01,40(17).