陕甘宁交界地区地震目录最小完整性震级分析  

Analysis of minimum complete magnitude of earthquake catalog in the border area of Shaanxi, Gansu and Ningxia

作　　者：冯亮亮 石军[2] 

机构地区：[1]宝鸡市地震局,中国陕西721004 [2]陕西省地震局,中国西安710068

出　　处：《地震地磁观测与研究》2018年第4期18-24,共7页Seismological and Geomagnetic Observation and Research

基　　金：2018年度启航与创新基金--鄂尔多斯西缘不同区域最小完整性震级研究(项目编号:QC201820)

摘　　要：根据陕甘宁交界区域测震台网中心提供的地震目录及部分台网资料,利用基于G—R关系的EMR方法,对1970年以来该区域地震目录最小完整性震级Mc的时空分布进行分析。结果显示:自1970年以来,该区域最小完整性震级Mc逐步下降,模拟、"九五""十五"阶段Mc分别为ML 2.3、ML 2.2、ML 1.6,2015年以来Mc维持在ML 1.3左右;"十五"数字化改造后,Mc空间分布呈现不均匀性,但整体低于ML 1.8。In this article, we have analyzed the minimum complete magnitude of earthquake with spatial and temporal distribution in the border area of Shaanxi, Gansu and Ningxia area base on EMR method from 1970. The data of earthquake catalogue and station network come from region station network. The results show that minimum complete magnitude of earthquake catalog has gradually declined. It was ML 2.3, ML 2.2 and ML 1.6 in analogous, in the ninth five-year plan and the tenth five-year plan stage, respectively from 1970, and has kept at ML 1.3 since 2015. It appears spatial and temporal distribution inhomogeneity. The entirety of minimum complete magnitude of earthquake catalog is inferior to ML 1.8.

关 键 词：最小完整性震级 陕甘宁交界区域 Mc时空分布 EMR方法 

分 类 号：P315.32[天文地球—地震学]