| 试论地震海啸的成因 |
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| 引用本文： | 魏柏林,何宏林,郭良田,杨选,康英.试论地震海啸的成因[J].地震地质,2010,32(1):150. |
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| 作者姓名： | 魏柏林 何宏林 郭良田 杨选 康英 |
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| 作者单位： | 1. 广东省地震局,广州,510070
2. 中国地震局地质研究所,北京,100029 |
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| 基金项目： | 科技部社会公益研究专项 |
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| 摘 要： | 经统计与研究,多数地震是不引发海啸的,故地震与海啸不存在直接的因果关系。这是因为引发地震海啸(特别是大的地震海啸)的直接原因,主要是海底地震所造成的次生的巨大体积的海底滑坡和崩塌,而不是海底地震时海底地面的同震错断与变形。因此,若未来震中附近存在不稳定海底滑坡和崩塌体,只要发生地震,不论震级大小与震源深浅,也不论震源类型(即倾滑或走滑)都可引起海底滑坡和崩塌,进而引发海啸。若未来震中附近不存在不稳定海底滑坡和崩塌体,再大震级的地震,即使是倾滑型地震也不能引发海啸
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| 关 键 词： | 地震 海啸 滑坡 崩塌 |
ON THE CAUSES OF EARTHQUAKE-GENERATED TSUNAMI |
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| Abstract: | Based on the study and statistics on earthquakes,we know that most of the earthquakes don't induce tsunami,so there is no direct causality between earthquake and tsunami.The earthquake-generated tsunami(especially the big earthquake-generated tsunami)is mainly induced by the secondary and huge volumetric submarine landslide and collapse caused by ocean-bottom earthquake,rather than the submarine coseismic dislocation and deformation.If there exist unstable submarine landslide and collapse bodies nearby the epicenter,earthquake,regardless of the size,the focal depth,or the source type(namely,dip-slip or strike-slip)of it,will induce submarine landslide and collapse,and then generate tsunami.Otherwise,it will not generate tsunami even with big magnitude or dip-slip |
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| Keywords: | earthquake tsunami landslide collapse |
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