ANALYSIS OF EARLY WARNING PROCESSING RESULTS FOR CHANGJI MS4.8 EARTHQUAKE ON JULY 20,2022
On July 20,2022,an Ms4.8 earthquake occurred in Changji,Xinjiang.The Xinjiang earthquake early warning system is in the test operation stage.The early warning results of the earth-quake 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 7.1s,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 7.8s after the earthquake,the magnitude deviation was-0.7,and the epicenter de-viation was 3.3 km.The magnitude and epicenter of the three sets of earthquake early warning sys-tems 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.
Earthquake early warningJEEWFJEEWWarning fusion system