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Wu Zhongliang,Huang Jing,Zhou Gongwei
Author NameAffiliation
Wu Zhongliang Center for Earth System Science, Graduate School of the Chinese Academy of Sciences, Beijing 100039, China;Institute of Geophysics, China Seismological Bureau, Beijing 100081, China; Center for Analysis and Prediction, China Seismological Bureau, Beijing 100036, China 
Huang Jing Institute of Geophysics, China Seismological Bureau, Beijing 100081, China; Center for Analysis and Prediction, China Seismological Bureau, Beijing 100036, China 
Zhou Gongwei Institute of Geophysics, China Seismological Bureau, Beijing 100081, China; 
摘要:
关键词:  震源机制 地震学 震深 震源物理
DOI:
分类号:
基金项目:This research was sponsored by the MOST(2001 CB711000)%国家自然科学基金(40274013)
Centroid Depth Versus Hypocentral Depth: Their Distribution and Depth/Mechanism Dependence
Wu Zhongliang,Huang Jing,Zhou Gongwei
Abstract:
The Harvard Global CMT catalogue from 1977 to 1998 is analyzed to investigate the relation between the centroid depth and the hypocentral depth. It is observed that for shallow earthquakes, the hypocentral depth is systematically larger than the centroid depth, while for deep_focus earthquakes there is no statistically significant difference between the distributions of centroid and hypocentral depth. A detailed look at the result reveals that such a systematic difference is mainly from the contribution of thrust and normal earthquakes, while strike_slip earthquakes have no such regularity. It turns out that for shallow thrust and normal earthquakes, seismic rupture tends to initiate from the deeper part.
Key words:  Centroid moment tensor  Focal mechanism  Focal depth