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作 者:刘炜 梁艳[2,3] 吕飞亚 李晨 LIU Wei;LIANG Yan;LV Feiya;LI Chen(Datong Earthquake Monitoring Center Station of Shanxi Earthquake Agency,Datong,Shanxi 037000,China;Shanxi Earthquake Agency,Taiyuan,Shanxi 030021,China;National Continental Rift Valley Dynamics Observatory of Taiyuan,Taiyuan,Shanxi 030025,China)
机构地区:[1]山西省地震局大同地震监测中心站,山西大同037000 [2]山西省地震局,山西太原030021 [3]太原大陆裂谷动力学国家野外科学观测研究站,山西太原030025
出 处:《山西地震》2024年第3期1-8,共8页Earthquake Research in Shanxi
基 金:山西省地震局科研项目(SBK-2413)。
摘 要:山西预警台网已进入正式运行阶段,山西作为重点预警区域,其预警能力直接影响山西及周边地区的预警效率。为精准评估山西预警台网的监测预警能力,基于台网记录的波形数据,选用仪器最大概率峰值位移作为背景噪声的评估指标,以确定台网的监测水平。结合预警高时效性的需求,对预警的最小震级和首报时间进行系统评估。结果显示,山西预警台网的平均监测能力达到M_(L)0.8,最小可监测到M_(L)-0.2,最大为M_(L)1.5;测震、强震、烈度台网三网融合后预警的最小震级为M_(L)2.1,首台触发预警平均时间为4 s,震后预警平均时间为6.9 s,使山西省能够有效地进行地震应对,提高对公众的安全保障,有效为公众和政府的地震应急管理提供科技支持。The Shanxi Earthquake Early Warning Network has entered the formal operation stage.As a key early warning area,Shanxi's early warning capability directly affects the early warning efficiency of Shanxi and surrounding areas.To accurately evaluate the monitoring and early warning capabilities of Shanxi Earthquake Early Warning Network,based on the waveform data recorded by the network,the maximum probability peak displacement of the instrument is selected as the evaluation index of background noise to determine the earthquake monitoring level of the network.A systematic evaluation was conducted on the minimum magnitude and initial reporting time of the warning,taking into account the need for timely warning.The results show that the average monitoring capability of Shanxi Early Warning Network reaches M_(L)0.8,with a minimum detectable M_(L)-0.2 and a maximum detectable M_(L)1.5;The minimum magnitude for early warning after the integration of seismic measurement,strong earthquake,and intensity network is M_(L)2.1.The average time for the first station to trigger early warning is 4 seconds,and the average time for post earthquake early warning is 6.9 seconds.The research results enable Shanxi Province to effectively carry out earthquake response,improve the level of public safety protection,and provide useful support for earthquake emergency management of the public and the government.
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