DOI: 10.1002/grl.50266
论文题名: An interpretation of tsunami earthquake based on a simple dynamic model: Failure of shallow megathrust earthquake
作者: Mitsui Y. ; Yagi Y.
刊名: Geophysical Research Letters
ISSN: 0094-9164
EISSN: 1944-8895
出版年: 2013
卷: 40, 期: 8 起始页码: 1523
结束页码: 1527
语种: 英语
英文关键词: dynamic rupture simulation
; megathrust earthquake
; numerical experiment
; The 2011 Tohoku earthquake
; thermal pressurization
; tsunami earthquake
Scopus关键词: 2011 tohoku earthquakes
; Dynamic ruptures
; Megathrust earthquakes
; Numerical experiments
; Thermal pressurization
; Tsunamis
; Earthquakes
; earthquake
; fault slip
; parameterization
; plate tectonics
; rupture
; seismic moment
; shear stress
; subduction zone
; tsunami
英文摘要: The 2011 Tohoku earthquake demonstrated that extremely large seismic slip can occur at shallow plate interfaces in subduction zones. The large slip area for the Tohoku earthquake included the source region of a tsunami earthquake. We performed dynamic rupture simulations using simplified fault models and the mechanism of thermal fluid pressurization. We found that small fluctuations of initial shear stress near a trench, within 1 MPa, lead to differences in seismic moment release greater than two orders of magnitude. In addition, we performed another experiment varying rupture nucleation sizes and obtained similar acute sensitivities of parameters. Moderate slip events with trapezoidal (flat-topped) source time functions appear to occupy a transition position, between shallow megathrust earthquakes with surface rupture and smaller ordinary earthquakes without surface rupture. We interpret this result as representing the differences in interplate slip between shallow megathrust earthquakes, tsunami (moderate) earthquakes, and non-tsunami (ordinary) earthquakes, on the basis of seismic observations. Key Points Modeling of shallow megathrust and tsunami earthquakes by the same system Sensitive dependence of stress conditions on earthquake characteristics. ©2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84877999405&doi=10.1002%2fgrl.50266&partnerID=40&md5=9ed323504a01350d5110b0a5bae7a2cf
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6428
Appears in Collections: 气候减缓与适应
There are no files associated with this item.
作者单位: Department of Natural History Sciences, Hokkaido University, Sapporo, Hokkaido, Japan
Recommended Citation:
Mitsui Y.,Yagi Y.. An interpretation of tsunami earthquake based on a simple dynamic model: Failure of shallow megathrust earthquake[J]. Geophysical Research Letters,2013-01-01,40(8).