吴忠、灵武地区地壳中上部速度结构

THE VELOCITY STRUCTURE OF THE UPPER AND MIDDLE CRUST IN THE WUZHONG LINGWU REGION

应用射线追踪方法进行震源参数和速度结构联合反演，对宁夏吴忠、灵武地区地壳中上部Ｐ波速度结构进行了研究。其结果与目前该区域地震定位所用的速度模型差异较大，与穿过研究区的人工地震剖面相比。

P wave velocity structure of the upper and middle crust in the Wuzhong Lingwu region is studied using the methods of ray tracing and the joint inversion of hypocentral parameters and velocity structure. The result is evidently different from the velocity model which is used to the seismic location in Ningxia. Compared them with the velocity from the artificial earthquake profile passing the study area, it is found that they trend to the same with increasing depth.