基于不同方法、地壳速度模型的地震定位研究及其在安徽地区的应用

Earthquake Location Research Based on Different Methods,the Crustal Velocity Model and Its Application in Anhui

以安徽台网产出的实际地震,运用MSDP5.2中不同定位方法分别配置原模型(华南模型)与新模型(AH2015模型)对其进行重新定位。统计定位残差及震中差(与编目结果震中位置偏差)等参数,并进行对比分析,旨在研究新老模型对不同定位方法的适用性。对比显示:AH2015模型对地震定位结果更好,更加符合安徽区域地壳一维速度结构。在使用单纯型或Hyposat定位法时,定位结果良好。结果认为:AH2015模型可以取代华南模型应用于安徽区域的地震速报与编目工作。

The paper calculates the parameters such as the positioning residuals and the epicenter difference（ distortion from the epicenter position of cataloging results）, and does comparative analysis to study the applicability of new and old models to different positioning methods. The results show that the AH2015 model on the earthquake location is better than South China model, and more suitable to the regional 1 d crust velocity structure in An Hui. When using the simplex or Hyposat positioning method, a good positioning result will be got.The AH2015 model can take place of South China model to locate earthquakes in An Hui.