Magnitude Calibration of Seismic Threshold Monitoring
Wei Tang · Northwestern Seismological Journal · 2011
Threshold Monitoring(TM) is a method of using real-time seismic data to evaluate the monitoring capability of Seismic network.After preprocessing seismic stations' data,short-term average(STA) instead of signal's amplitude is used for calculating events' magnitude,but it can product bias error.In this paper a method for calculating seismic station's parameters of TM system is researched,and magnitude's correction coefficents for parts of seismic stations in Xinjiang region are calculated,using the historical event records to choose the optimal frequency band for calculating the difference between log(A/T) and log(STA) in each stations.A correction table for these stations and evaluation of the monitoring capability including these magnitude's corrections are reasonable.