Analysis of Seismologic Surveillance Capacity of Digital Seismological Network in Datong

According to the network layout and the practical parameters and using the inverse method,the surveillance capacities of the digital network and the simulated network in Datong were analyzed and calculated respectively,the responsibility range of the fast earthquake report of the digital network was determined roughly,and the response capacity for the large earthquakes of the network was discussed.The conclusion showed that the surveillance capacity of digital seismological network in Datong increased than the simulated network,its surveillance capacity reached the magnitude 2 0 inside and its edge.The detectability of the digital network is the magnitude 5 0 inside,the records of the bigger earthquakes will limite variation,the determination of the magnitude is difficult.