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108/02/26 13:30 新加坡南洋理工大學邱強博士 演講

演講公告
張貼人:網站管理員公告日期:2019-02-21
 
演 講 公 告
 

講題:Revised earthquake sources for tsunami hazard assessment in South China Sea: A sleeping giant under the Manila trench

 

主講人:邱強 博士
 
    新加坡南洋理工大學

 
時間:02月26日(星期二)下午1點30分
 

地點:中央大學科學一館S-325教室
 

摘要:
 
  Seismogenic tsunami hazard assessment highly depends on the reliability of earthquake source models. Here in Manila subduction zone, we combine the geological characteristics of the subducting Sunda plate, the geometry, and coupling state of the Manila trench to propose a series of physical-based fault rupture scenarios. We divide the subduction zone into 3 rupture segments: 14°N-16°N, 16°N-19°N and 19°N-21.7°N informed by local geological structures. Each of the segments can hold earthquake with magnitude between Mw 8.5+ and Mw 9+ assuming a-1000 year seismic return period. For the most poorly constrained segment between 19°N-21.7°N, inspired both by local geological structures and characteristics of major earthquakes in other subduction zone, we further explore the rupture characteristics in segment 3 by considering multiple rupture modes: seismogenic, tsunami earthquake-like and mega-splay earthquakes. These rupture models facilitate our understanding the potential tsunami hazard in the SCS. Numerical simulations demonstrate that coastlines of the South China Sea (SCS) could be devastated by up to 10-m tsunami waves if such large megathrust earthquake occurs. The most hazard prone regions include west Luzon of Philippine, southern Taiwan, the southern China, central Vietnam and Palawan.
 
最後修改時間:2019-02-21 PM 1:28

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