Ground rotational motions recorded in near-source region of earthquakes

被引：139

作者：

Takeo, M ^{[1
]}

机构：

[1] Univ Tokyo, Earthquake Res Inst, Bunkyo Ku, Tokyo 113, Japan

来源：

GEOPHYSICAL RESEARCH LETTERS | 1998年 / 25卷 / 06期

关键词：

D O I：

10.1029/98GL00511

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Large rotational motions excited by earthquakes are-recorded during an earthquake swarm of March, 1997, offshore Ito in Izu peninsula, Japan. The largest rotational velocity recorded at KAW is 2.6x10(-2) rad/s around the north-south axis during an earthquake of magnitude 5.2 at 14:09 (GMT) on March 3. The rotational motions around the vertical axis excited by the largest event is 3.3x10(-3) rad/s. Considering a spatial variation of slip velocity which directly relates to excitation of a rotational motion, we apply a simple point source model to the largest event and succeed in explaining the observed rotational motion around the vertical axis.

引用

页码：789 / 792

页数：4

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