PMC方法在江苏测震台网监测能力评估中的应用  

Analysis of Monitoring Capability of Jiangsu Seismic Network Based on PMC Method

作　　者：立凯 何奕成 宫杰[1] 何浩宇 秦磊[1] 霍祝青[1] Li Kai;He Yicheng;Gong Jie;He Haoyu;Qin Lei;Huo Zhuqing(Jangsu Earthquake Administration,Nanjing 210014,China)

机构地区：[1]江苏省地震局,南京210014

出　　处：《震灾防御技术》2023年第3期642-650,共9页Technology for Earthquake Disaster Prevention

基　　金：江苏省地震局青年基金(202101);江苏省地震局科技创新团队(2022-03、2022-04);中国地震局地震应急与信息青年重点任务(CEAEDEM202308);中国地震局地震星火科技计划项目(XH23015 A);国家自然科学基金(41874051)。

摘　　要：江苏测震台网经近20年的高速发展,已拥有75个数字测震台站,针对江苏台网监测能力的评估需求,同时为进一步优化台网布局,提高江苏测震台网监测能力提供参考意见,本文使用基于概率的完整性震级方法,利用江苏台网2009-2021年正式编目观测报告数据,对江苏台网进行监测能力评估。研究结果表明,江苏台网监测能力较好的地区为北部连云港周边地区,监测能力达到了M_(L)≥1.5;监测能力较差的地区为中部地区及近海海域,监测能力达到了M_(L)≥2.0。整个江苏台网基本实现了M_(L)≥2.0的监测能力,周边地区及中部近海海域基本实现了M_(L)≥2.5的监测能力。After nearly two decades of rapid development,the Jiangsu Seismic Network has expanded to include 75 digital seismic sta-tions.This study aims to evaluate the monitoring capabilities of the Jiangsu network and provide recommendations for optimizing the network layout and improving its monitoring effectiveness.The evaluation utilizes the Probability-based Magnitude of Completeness(PMC)method and examines the official cataloged observation report data from 2009 to 2021.The research findings indicate variations in monitoring capabilities across different regions of the Jiangsu network.The northern regions,particularly around Lianyungang,ex-hibit relatively robust monitoring capabilities,with a threshold of M_(1)≥1.0.The southern regions,including Nanjing,Zhenjiang,Chang-zhou,and the surrounding areas,demonstrate relatively stronger monitoring capabilities,reaching approximately M_(1)≥1.5.The central regions and nearshore areas exhibit lower monitoring capabilities,with a threshold of M_(1)≥2.0.Overall,the entire Jiangsu network has achieved a satisfactory level of monitoring capabilities for≥2.0,while the surrounding areas and central nearshore regions have achieved a higher level of seismic monitoring capabilities,reaching M_(1)≥2.5.

关 键 词：江苏测震台网 监测能力评估 完整性震级PMC方法 

分 类 号：P315.78[天文地球—地震学]