Abstract:We selected two earthquake sequences based on the monitoring capabilities of the nation automatic earthquake information release system in Yangbi of Yunnan Province and Maduo of Qinghai Province,from May 18,2021 to May 29,2021,to analyze the performance of the system in the earthquake sequence. The nation automatic earthquake information release system basically realizes the first output of single-channel automatic earthquake information within 1 minute,and the output time varies from 30 seconds to 60 seconds according to the density of the station network. Compared with the earthquake cataloguing results,the deviation of the earthquake epicenter location of the earthquake sequence in Yangbi,Yunnan was small,while the deviation of the epicenter location of the Qinghai Maduo earthquake sequence was relatively large. However,the deviation of magnitude of both earthquake sequences was not large. The large deviation of the epicenter location may be due to the scarcity of stations in the area,lack of nearby stations and the large gap angles between stations. There were a small number of missed earthquakes in the automatic earthquake information release system,which is probably related to the low signal-to-noise ratio of the system during positioning,the large gap angle of the station,and the aliasing of multiple earthquakes.