摘要
2023年4月6日19时22分,辽宁省大连市庄河市发生M_(L)3.7级地震,辽宁地震预警台网成功触发并且产出了预警结果。针对此次地震事件产出的预警结果,对地震三要素和正式编目结果进行了对比,分别将JEEW和EEW两套预警系统产出的结果偏差进行详细分析。两套预警系统产出第一次处理结果的时间都是4 s,首次推送用时都是5 s左右。JEEW产出结果中震级偏差为0.15~0.57,19个结果的震级偏差大于0.3,EEW产出结果中震级偏差在-0.1~0.3之间;JEEW震中位置偏差为1.08~4.97 km,EEW震中位置偏差为0.918~4.438 km;JEEW发震时刻偏差为0.911~0.531 s,EEW发震时刻偏差为0.675~0.206 s;除了JEEW预警系统的震级结果偏大之外,其余的结果都满足要求。本次地震预警结果表明:辽宁地震预警系统产出结果较好,对地震预警效果具有一定的参考意义。
At 19:22 on April 6,2023,the M_(L)3.7 earthquake occurred in Zhuanghe City,Liaoning Prov⁃ince.The Liaoning Earthquake Early Warning Network was successfully triggered and outputted early warn⁃ing results.Aiming at the early warning results of the earthquake,this paper compares the three elements of earthquake and the formal cataloging results,analyzes the deviation of the results of JEEW and EEW in de⁃tail.Both of JEEW and EEWoutputted the first processing result within 4s,and the first push took about 5s.The magnitude deviation of JEEW output results ranges from 0.15 to 0.57,and the magnitude deviation of 19 results is greater than 0.3.The magnitude deviation of EEW output results is between-0.1 and 0.3.The epicentral location deviation of JEEW is between 1.08km and 4.97km,and that of EEW is between 0.918km and 4.438km.The arrival time deviation of JEEW is between-0.911s and-0.531s,and that of EEW is between-0.675s and-0.206s.All the results meet the requirements except that the JEEW's seismic magnitude results are too large.The results of this earthquake early warning show that the Earthquake Early Warning System of Liaoning produces good results,which has certain reference significance for the earth⁃quake early warning effect.
作者
王晓睿
郭攀
李子昊
查楠
王承伟
WANG Xiaorui;GUO Pan;LI Zihao;CHA Nan;WANG Chengwei(Liaoning Earthquake Agency,Liaoning Shenyang 110034,China)
出处
《防灾减灾学报》
2023年第3期27-32,共6页
Journal of Disaster Prevention And Reduction
关键词
地震预警
庄河M_(L)3.7地震
预警处理结果
earthquake early warning
Zhuanghe M_(L)3.7 earthquake
early warning processing results
