中国西部地震视应力的空间分布  

DISTRIBUTION OF APPARENT STRESS IN WESTERN CHINA

作　　者：吴忠良[1] 黄静[1] 林碧苍[1] 

机构地区：[1]中国地震局地球物理研究所,中国北京100081

出　　处：《地震学报》2002年第3期293-301,共9页Acta Seismologica Sinica

基　　金：国家科技部 ( G1 9980 4 0 70 5; 95 -S-0 5以及 2 0 0 1 BA6 0 1 B0 2 )资助项目

摘　　要：利用 1 987年 1月～ 1 998年 1 2月的 NEIC宽频带地震辐射能量目录和哈佛 CMT目录 ,给出了中国大陆地震的视应力分布 .由于资料所限 ,主要结果是针对西部的结果 .所得结果表明 ,中国大陆地震的视应力平均为 0 .8MPa.青藏高原东缘的视应力最高为 2 .6 MPa,平均水平高于其邻近地区一倍以上 .视应力分布与 2Distribution of apparent stress in Chinese mainland and its surrounding regions was presented using the NEIC broadband radiated energy catalogue and the Harvard CMT catalogue from January 1987 to December 1998. Due to the limitation on the number of samples, reliable results are only for the western China. It is observed that the average apparent stress in Chinese mainland is 0.8 MPa; The maximum apparent stress to the east of the Tibetan plateau is 2.6 MPa; And the average apparent stress in the north-south seismic belt is more than one time higher than its adjacent regions. Distribution pattern of apparent stress seems to have a large-scale correlation with the cumulative energy release level in the 20th century.

关 键 词：中国西部 空间分布 视应力 地震能量 地震矩 地震 

分 类 号：P315.727[天文地球—地震学]