摘要
主要从东海发生地震海啸的可能性分析,海啸传播过程的特点以及发生概率几个方面重点阐述讨论了东海地震海啸的一些特性,并分析了地震海啸在东海发生的概率及其特点。得出东海潜在海啸源区主要位于冲绳海槽内,数值模拟海啸在东海的传播过程方程应采用球坐标系下的线性方程,对于近岸的传播包括上岸部分的研究应该采用笛卡儿坐标系下的非线性方程,并且要考虑底部摩擦等项的对波浪的衰减作用。
In this paper, the potential seismic tsunami hazard in East China Sea, the characteristics of tsunami spreading process and its incidence rate were discussed. The results showed that potential tsunami region in East China Sea mostly lay in Okinawa Trough, and its incidence rate is low, the influence of tsunami disaster to China is small. We can get that Okinawa Trough is the mainly potential source areas of earthquake tsunami in East China Sea. Distant propagation of tsunamis can be adequately modeled using the linear Boussinesq equations in the spherical coordinate system, and as the tsunami propagates over the continental shelf and gets to the coastal area, the nonlinear shallowwater equations including bottom frictional effects are adequate to describe the flow motion.
出处
《内陆地震》
2009年第4期490-498,共9页
Inland Earthquake
基金
国家自然科学基金(40576022)资助
关键词
地震海啸
冲绳海槽
东海
Earthquake tsunami
Okinawa Trough
East China Sea
