2022年7月20日昌吉M_(S)4.8地震预警处理结果分析  

ANALYSIS OF EARLY WARNING PROCESSING RESULTS FOR CHANGJI M_(S)4.8 EARTHQUAKE ON JULY 20,2022

作　　者：闫新义 陈勇[1] YAN Xin-yi;CHEN Yong(Earthquake Agency of Xinjiang Uygur Autonomous Region,Urumqi 830011,Xinjiang,China)

机构地区：[1]新疆维吾尔自治区地震局,新疆乌鲁木齐830011

出　　处：《内陆地震》2024年第3期223-230,共8页Inland Earthquake

基　　金：新疆地震科学基金(202403)。

摘　　要：2022年7月20日,新疆昌吉市发生M_(S)4.8地震,新疆地震预警系统处于测试运行阶段,对该次地震事件完成预警结果产出,数据仅在内部参考。综合分析该事件预警结果(JEEW、FJEEW及融合系统产出),相较于中国地震台网中心正式地震速报结果,JEEW系统首报触发用时7.1 s,震级偏差-0.7,震中偏差3.3 km;FJEEW系统首报触发用时7.5 s,震级偏差-1.1,震中偏差3.4 km。预警融合系统首报发布于震后7.8 s,震级偏差-0.7,震中偏差3.3 km,3套地震预警系统发布结果震级、震中皆有较好的一致性。对于该次地震事件,地震预警系统发布时效性、震级、震中结果的准确性达到建设目标要求。On July 20,2022,an M_(S)4.8 earthquake occurred in Changji,Xinjiang.The Xinjiang earthquake early warning system is in the test operation stage.The early warning results of the earthquake event are output,and the data are only internally referenced.Comprehensive analysis of the early warning results of the event(JEEW,FJEEW and fusion system output),compared with the official earthquake rapid report results of the China Earthquake Networks Center,the first report of the JEEW system takes 7.1 s,the magnitude deviation is-0.7,and the epicenter deviation is 3.3 km.The triggering time of the first report of the FJEEW system is 7.5 s,the magnitude deviation is-1.1,and the epicenter deviation is 3.4 km.The first report of the early warning fusion system was released 7.8 s after the earthquake,the magnitude deviation was-0.7,and the epicenter deviation was 3.3 km.The magnitude and epicenter of the three sets of earthquake early warning systems were in good agreement.For this earthquake event,the accuracy of the timeliness,magnitude and epicenter results of the earthquake early warning system meets the requirements of construction goal.

关 键 词：地震预警 JEEW系统 FJEEW系统 预警融合系统 

分 类 号：P315.7[天文地球—地震学]