An overview on shallow strong earthquake activity and earthquake live losses of Chinese mainland in the centenary from 1901 to 2001

作     者：傅征祥 刘桂萍 邵辉成 丁香 

作者机构：Institute of Earthquake Science China Earthquake Administration Beijing 100036 China Department of Earthquake Monitoring and Prediction China Earthquake Administration Beijing 100036 China Earthquake Administration of Shaanxi Province 

出 版 物：《Acta Seismologica Sinica(English Edition)》 (地震学报)

年 卷 期：2005年第18卷第4期

页      面：392-401页

核心收录：

学科分类：070801[理学-固体地球物理学] 07[理学] 0708[理学-地球物理学] 

基　　金：Social Commonweal Research Project of the Ministry of Science and Technique (2004DIA3J010) and Joint Seis-mological Science Foundation of China (104016) 

主　　题：Chinese mainland shallow earthquake activity live losses 1901~2001 

摘      要：This paper reviews and analyses briefly the general characteristics of shallow strong earthquakes (MS≥6.0, focal depth h≤70 km) in space, time and magnitude and earthquake fatalities of Chinese mainland in the centenary from 1901 to 2001. During the period from 1901 to 2001, there occurred about 420 strong shallow earthquakes with magnitude MS≥6.0, 88% of them occurred in the western part of the Chinese mainland, which might be related to the strong deformation and motion of the active blocks in the western part. The average focal depth (25 km) in the western part is deeper than that (16 km) in the eastern part, which might be related to obviously thicker crust in the western part. The inhomogeneous distribution of focal depths with the depth profile is related to the variation of frictional and rheologic characteristics with depth in the crust. The shallow strong earthquake activity of Chinese mainland shows a tempo-spatial clustering process. The relation between earthquake magnitude MS and cumulative frequency Nc is lgNc=8.64–0.99MS. About 600 000 people died in the earthquakes of Chinese mainland from 1901 to 2001, the most serious earthquake live losses occurred in Hebei Province (250 723 people died) and Ningxia Hui Autonomous Region (246 269 died). There is no a statistically linear relationship between earthquake live losses and magnitudes. The statistical relationship between the earthquake deaths D and cumulative frequency Nc is lgNc=2.40–0.39lgD, which shows a fractal distribution.