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本文介绍了分析区域地震台网的测震精度的一种通用方法,在分析过程中,对发生在台网中不同地点、不同震级的地震,考虑了能读出P波震相的台站的不同组合数,即子台网。然后利用最小二乘法拟合模型的最优化法和改进的平方根法对事先设定的到时数据标准误差计算出震源坐标误差分布和走时误差分布。并将计算结果根根是否能达到Ⅰ类精度(即ΔR=10km,ΔT=0.5s)绘成监测范围图。
In this paper, a general method to analyze the seismic accuracy of regional seismic network is introduced. During the analysis, considering the earthquakes that occur in different places and different magnitudes in the network, Different combinations, that is, sub-network. Then, using the least squares fitting model optimization method and the improved square root method to calculate the standard deviation of the arrival time of the data set beforehand, the source coordinate error distribution and travel time error distribution are calculated. And the root of the calculation results can reach Ⅰ class accuracy (ie, ΔR = 10km, ΔT = 0.5s) as the monitoring range map.