Study of Minimum Magnitude of Completeness in the North-South Trending Seismic Belt for the Collaboratory for the Study of Earthquake Predictability Project  

作　　者：Han Libo Jiang Changsheng Li Yan'e Guo Xiangyun 

机构地区：[1]Institute of Geophysics, CEA

出　　处：《Earthquake Research in China》2012年第4期432-443,共12页中国地震研究（英文版）

基　　金：jointly sponsored by the Youth Fund Progamm of the National Natural Science Foundation of China ( 40804010 );the Central-level Basic Science Programm of Institute of Geophysics,CEA (DQJB10B23)

摘　　要：To determine the studying region of China Testing Center of the Collaboratory for the Study of Earthquake Predictability （CSEP）, we adopted the Entire-Magnitude-Range （EMR） method to study the spatial distribution of minimum magnitude of completeness （Mc） in the North-South Trending Seismic Belt （NSTSB） during the period from October 1, 2008 to May 31, 2011. Also bootstrap testing was performed to estimate the uncertainty of Mc, i. e. 8Mc. The results show that Mc （EMR） = 1.6 ± 0. 03 for the whole region. From the spatial distributions of Mc we find that Mc is in the range of Mu 1.3 ±2.0 for most regions. Specifically, the spatial distribution of Mc is consistent with the distribution of stations indicating high monitoring level in the southern part and low monitoring level in the northern part. Events located with less than three stations have great influence on Me. Moreover, the uncertainty of minimum magnitude of completeness 6Mc ranges from 0. 07 to 0.22. The spatial distribution of 6Mc agrees with the seismic rate. The shorter time span may cause larger 6McTo determine the studying region of China Testing Center of the Collaboratory for the Study of Earthquake Predictability (CSEP), we adopted the Entire-Magnitude-Range (EMR) method to study the spatial distribution of minimum magnitude of completeness (MC) in the North-South Trending Seismic Belt (NSTSB) during the period from October 1, 2008 to May 31, 2011. Also bootstrap testing was performed to estimate the uncertainty of MC, i.e. δMC. The results show that MC (EMR)=1.6±0.03 for the whole region. From the spatial distributions of MC we find that MC is in the range of ML1.3～2.0 for most regions. Specifically, the spatial distribution of MC is consistent with the distribution of stations indicating high monitoring level in the southern part and low monitoring level in the northern part. Events located with less than three stations have great influence on Mc. Moreover, the uncertainty of minimum magnitude of completeness δMC ranges from 0.07 to 0.22. The spatial distribution of δMC agrees with the seismic rate. The shorter time span may cause larger δMC.

关 键 词：Earthquake Predictability CSEP Minimum magnitude of completeness（MC） Entire-Magnitude-Range （EMR） method 

分 类 号：P315[天文地球—地震学]