地震自动编目处理系统在2023年广东河源M4.3地震序列中的应用  

Application of Seismic Automatic Cataloguing Processing System in Heyuan M4.3 Earthquake Sequence in Guangdong in 2023

作　　者：梁明 刘军[1,2] 洪玉清 林庆西 姜喜姣 田平 LIANG Ming;LIU Jun;Hong Yuqing;LIN Qingxi;JIANG Xijiao;TIAN Ping(Guangdong Earthquake Agency,Guangzhou 510070,China;Key Laboratory of Earthquake Monitoring and Disaster Mitigation Technology,CEA,Guangzhou 510070,China)

机构地区：[1]广东省地震局,广州510070 [2]中国地震局地震监测与减灾技术重点实验室,广州510070

出　　处：《华南地震》2023年第4期119-125,共7页South China Journal of Seismology

基　　金：中央级公益性科研院所基本科研业务专项(DQJB22Z01);广东省地震局青年地震科研基金(重点实验室开放基金)项目(GDDZY202309)联合资助。

摘　　要：利用广东省地震局地震监测技术及软件研发创新团队研发的两套地震自动编目处理系统,对2023年2月11日广东河源M4.3地震主震前1天以及后7天广东台网记录的连续波形数据进行了处理,并结合人工编目结果,对该时段内系统自动检测结果进行详细对比分析。结果表明:系统1自动检测的地震数量是人工目录的2.67倍,事件匹配率较高,而系统2自动检测的地震数量约为人工目录的二分之一,ML1.0级以下地震事件匹配率较低。两套系统自动检测结果均为地震事件,无误触发,自动检测事件真实率为100%。与人工目录结果对比,两套系统产出的发震时刻、震中位置、震源深度、Pg和Sg震相到时等均偏差较小,可靠度较高。综合来看,两套系统都具备地震自动编目的能力;其中,系统1处理大震后较密集余震的能力较强,可以产出完备性较好的地震目录。Two sets of seismic automatic cataloguing processing systems developed by the earthquake monitoring technology and software R&D innovation team of Guangdong Earthquake Agency were used to process the continuous waveform data recorded by Guangdong seismic network one day before and seven days after the main earthquake of Heyuan M4.3 earthquake on February 11,2023.Combined with the manual cataloguing results,the automatic detection results of the system during this period were analyzed in detail.The results show that the number of earthquakes automatically detected by system 1 is 2.67 times that of the manual catalog,and the event matching rate is high,while the number of earthquakes automatically detected by system 2 is about half that of the manual catalog,and the matching rate of earthquake events with M_(L)≤1.0 is low.The automatic detection results of the two systems are all seismic events,the real rate of automatic detection events is 100%.The deviation between the automatic catalog and the manual catalog produced by the two systems is small in the earthquake origin time,epicenter location,the focal depth,the arrival time of Pg and Sg phase,and the reliability is high.On the whole,the two systems have the ability of seismic automatic cataloging.In contrast,system 1 has a stronger ability to handle dense aftershocks after a large earthquake and can produce a relatively complete earthquake catalog.

关 键 词：地震自动编目 深度学习 广东河源地震 

分 类 号：P315.7[天文地球—地震学]