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地震的定位对地壳的一维速度模型有很大的依赖性.安徽地区的地震定位配置的是华南地壳模型,该模型比较吻合于安徽地区实际地壳结构.然而由于区域特殊性,华南模型跟实际地壳结构仍然有着明显的差异.本文作者对近年来发生于安徽地区的较大地震,对震相进行了提取、拟合、折合走时等分析.基于Hyposat定位法在华南模型的基础上进行修正得到了更适合于安徽地区地壳结构的一维速度模型.研究表明,新模型(最优模型)在地震定位中比华南模型的效果更好;其定位残差和震中差都比华南模型更小,而且分布更均匀稳定;更加符合安徽地区地壳结构.
Earthquake location has a great dependence on the crustal one-dimensional velocity model.Seismic locating and distribution in Anhui area is the South China crustal model, which is in good agreement with the actual crustal structure in Anhui Province.However, due to the regional specificity, There is still a significant difference in the crustal structure.According to the large earthquakes that occurred in Anhui Province in recent years, the author has carried out the analysis of the seismic facies such as extraction, fitting, travel time, etc .. Based on the Hyposat localization method, Which is more suitable for the crustal structure in Anhui Province.The results show that the new model (optimal model) is better than the South China model in seismic location, and the localization residuals and epicentral differences are smaller than the South China model, More uniform and stable distribution; more in line with the crustal structure in Anhui Province.