The earthquake and tsunami of 1865 November 17: evidence for far-field tsunami hazard from Tonga

被引：28
|
作者：
Okal, EA [1 ]
Borrero, J
Synolakis, CE
机构：
[1] Northwestern Univ, Dept Geol Sci, Evanston, IL 60201 USA
[2] Univ So Calif, Dept Civil Engn, Los Angeles, CA 90089 USA
来源：
GEOPHYSICAL JOURNAL INTERNATIONAL | 2004年 / 157卷 / 01期
关键词：
historical earthquakes; Tonga Islands; tsunami hazard; tsunami simulation;
D O I：
10.1111/j.1365-246X.2004.02177.x
中图分类号：
P3 [地球物理学]; P59 [地球化学];
学科分类号：
0708 ; 070902 ;
摘要：
Historical reports of an earthquake in Tonga in 1865 November identify it as the only event from that subduction zone which generated a far-field tsunami observable without instruments. Run-up heights reached 2 m in Rarotonga and 80 cm in the Marquesas Islands. Hydrodynamic simulations require a moment of 4 x 10(28) dyn cm, a value significantly larger than previous estimates of the maximum size of earthquake to be expected at the Tonga subduction zone. This warrants an upwards re-evaluation of the tsunami risk from Tonga to the Cook Islands and the various Polynesian chains, which had hitherto been regarded as minor.
引用
收藏
页码：164 / 174
页数：11
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