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Centroid Depth Versus Hypocentral Depth: Their Distribution and Depth/Mechanism Dependence

Wu Zhongliang Huang Jing Zhou Gongwei

中国地震研究(英文版)2003，Vol.17Issue(3)：220-226,7.

Centroid Depth Versus Hypocentral Depth: Their Distribution and Depth/Mechanism Dependence

Wu Zhongliang ¹Huang Jing ²Zhou Gongwei³

作者信息

1. Center for Earth System Science, Graduate School of the Chinese Academy of Sciences, Beijing 100039, China
2. Institute of Geophysics, China Seismological Bureau, Beijing 100081, China
3. Center for Analysis and Prediction, China Seismological Bureau, Beijing
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摘要

Abstract

The Harvard Global CMT catalogue from 1977 to 1998 is analyzed to investigate the relationbetween the centroid depth and the hypocentral depth. It is observed that for shallowearthquakes, the hypocentral depth is systematically larger than the centroid depth, while fordeep-focus earthquakes there is no statistically significant difference between the distributions ofcentroid and hypocentral depth. A detailed look at the result reveals that such a systematicdifference is mainly from the contribution of thrust and normal earthquakes, while strike-slipearthquakes have no such regularity. It turns out that for shallow thrust and normalearthquakes, seismic rupture tends to initiate from the deeper part.

关键词

Centroid moment tensor/Focal mechanism/Focal depth

Key words

Centroid moment tensor/Focal mechanism/Focal depth

引用本文复制引用

Wu Zhongliang,Huang Jing ,Zhou Gongwei..Centroid Depth Versus Hypocentral Depth: Their Distribution and Depth/Mechanism Dependence[J].中国地震研究(英文版),2003,17(3):220-226,7.

基金项目

This research was sponsored by the MOST 2001 CB711000 and NSFC 40274013. （）

中国地震研究(英文版)

ISSN：2096-9996

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