国家地震烈度速报江苏子系统参数测定能力评估  

Evaluation of the Parameter Determination Capability of Jiangsu Subsystem in the National Earthquake Rapid Reporting System

作　　者：钱婷 王俊[1] 魏梦婉 何奕成 杜航[1] 倪昊琦 QIAN Ting;WANG Jun;WEI Mengwan;HE Yicheng;DU Hang;NI Haoqi(Jiangsu Earthquake Agency,Nanjing 210014,China)

机构地区：[1]江苏省地震局,江苏南京210014

出　　处：《防灾减灾工程学报》2024年第3期725-729,共5页Journal of Disaster Prevention and Mitigation Engineering

基　　金：地震科技星火项目(XH23015A);江苏省地震局科技创新团队(202204);中国地震局监测、预报、科研三结合课题(3JH-202401014)资助。

摘　　要：分析了2023年3月以来江苏地震烈度速报与预警系统震源参数测定的可靠性和精度。研究选取2022年3月1日至2023年12月20日期间江苏地区发生的98条M_(L)≥2.0地震事件,对比了新旧两套系统对同一事件的定位结果。结果显示,震中位置偏差大多数在0.3~12.1 km范围内,大部分误差属于正常范围。两套系统的震级偏差普遍较小,只有少数结果因定位台站的数量、钟差、数据噪声和干扰等因素导致偏差较大。此外,监测能力方面,新系统的监测能力整体提升M_(L)0.5,二维模拟地震定位测试方法显示定位精度也有所提升,整体来看,新系统展现出良好的实效性,能为地震分析和科学研究提供可靠的数据支持。This article analyzes the reliability and accuracy of the seismic intensity rapid reporting and warning system's source parameter determination in Jiangsu since March 2023.The study selected 98 seismic events with M_(L)≥2.0 that occurred in the Jiangsu region from March 1,2022,to December 20,2023,and compared the results of the new and old systems for the same events.The results show that the epicenter location deviations are mostly within the range of 0.3-12.1 km,with the majority of errors falling within the normal range.The seismic magnitude deviations of both systems are generally small,with only a few results showing larger deviations due to factors such as the number of locating stations,clock errors,data noise,and interference.Additionally,in terms of monitoring capability,the seismic magnitude monitoring lower limit of the new system decreased overall by M_(L)0.5.Two-di-mensional simulation earthquake location testing methods showed an improvement in positioning accu-racy.Overall,the new system demonstrated good practicality and can provide reliable data support for earthquake analysis and scientific research.

关 键 词：江苏 地震烈度速报预警系统 震级偏差 震中位置 定位精度 

分 类 号：TU443[建筑科学—岩土工程]