新疆地区地震目录最小完整性震级  

Minimum magnitude of completeness for earthquake catalogues in Xinjiang region

作　　者：孔祥艳[1] 张盛峰[2] 刘建明[1] 上官文明[1] Kong Xiangyan;Zhang Shengfeng;Liu Jianming;Shangguan Wenming(Earthquake Administration of Xinjiang Uygur Autonomous Region, Urumqi 830011, China;Earthquake Administration of Shandong Province, Jinan 250014, China)

机构地区：[1]新疆维吾尔自治区地震局,中国乌鲁木齐830011 [2]山东省地震局,中国济南250014

出　　处：《地震地磁观测与研究》2016年第4期39-43,共5页Seismological and Geomagnetic Observation and Research

基　　金：新疆地震科学基金(201402);新疆地震科学基金(201506)联合资助;中国地震局三结合课题(163105)

摘　　要：最小完整性震级M_c是表征测震台网监测能力的重要参数,本研究采用"完整性震级范围"(EMR)方法,分"九五"和"十五"两阶段分析2001年1月1日到2015年9月30日新疆地区地震目录M_c空间分布特征,并使用Bootstrap方法,评估M_c不确定度δM_c。分析结果表明,M_c空间分布不均匀,与地震台站分布密度基本一致。此外,多数地区的δM_c≤0.2个震级单位,空间分布不均匀。"十五"以来新疆地区M_c值普遍减小,表明新疆测震台网地震监测能力得到有效提升。The minimum magnitude of completeness Mc reflects the network monitoring capability. For the 2 development periods (“the ninth five-year plan” and “the tenth five-year plan”) of Xinjiang Seismic Network, we used the entire-magnitude-range (EMR) method to study the spatial distribution of minimum magnitude of completeness Mc in Xinjiang region from Jan. 1, 2001 to Sep. 30, 2015. Bootstrap testing are also performed to estimate the uncertainty of Mc. This results show that the distribution of Mc is spatially inhomogeneous, and the spatial distributions of Mc are consistent with the distributions of stations. Moreover, the uncertainties of minimum magnitude of completeness δMc ≤ 0.2, and its distribution is also spatially inhomogeneous. The value of Mc is generally decrease after “the tenth five-year plan”, which indicated that the monitoring capability of Xinjiang Seismic Network had been significantly improved.

关 键 词：地震编目 最小完整性震级 EMR 方法 新疆测震台网 

分 类 号：P315[天文地球—地震学]