山西大同数字地震台网监测能力分析

根据台网布局和实际使用参数，运用反推方法，对大同数字遥测地震台网和模拟遥测地震台网的监控能力进行了计算分析，粗定了数字台网速报表任区的范围，并对数字台网的大震响应能力进行了讨论，结果表明，大同数字台网的监控能力较模拟台网有了较大的提高，整个网内及网缘地震的监控能力为２．０级，网内大部分区域及东部网缘区域可达１．５级；数字台网对网内最大的测定能力为５．０级，网内南部区域可达５．５级；对于网内更大震级的地震，记录将全部限幅，测定震级困难，对山西北部５．５级以上地震要靠山西台网中北部台站来控制。

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.