寻乌及邻区遗漏地震检测及目录完整性分析OACSTPCD

Using the matched filtering technology to detect the missing earthquake events in Xunwu and its adjacent area from January 2009 to December 2020,a total of 306 missing earthquakes were detected,which is about 40%of the network catalog,and the catalog integrity of earthquakes below ML1.5 has been significantly improved.The b value changes from 0.885 to 0.917 after adding missed earthquakes.The 36,15 and 8 missing earthquakes were detected in Xunwu,Pingyuan and Anyuan earthquake swarms in the region,which are about 1/2,1/3 and 1/5 of the original earthquake swarm catalogue,and the proportion of missing earthquakes is closely related to the number of template earthquakes.The determination result of the ρ value of the Xunwu earthquake swarm changes from non-precursor to precursor after the supplementing the missing earthquakes,indicating that the missing earthquakes detection has an important influence on the identification of precursory earthquake swarm.