Abstract:
In order to establish a more appropriate one-dimensional velocity model for the earthquake quick reporting and compiling catalogue in Hebei Seismometry Network, 1113 earthquakes with the positioning station number over 10 and the M magnitude over 1were collected and 48 earthquakes were selected from January 2009 to October 2014. Firstly, the range of parameters in one-dimensional velocity model was got by the methods of the sliding window fitting, the travel time reducing and referring to some previous researches. Secondly, to establish the new model of Hebei by the program of Hyposat Batching with the 48 selected earthquakes for 58902 calculations. The new velocity model was established according to the criterion, that the residual of the calculation was minor and the deviation of epicenter between the calculation and the compiling catalogue was minimum. Thirdly, the new velocity model was examined by the comparison of residual results, the depth positioning by the PTD, the blast events and the typical earthquakes and so on. It was shown that comparing to the South-China mode the new velocity model is more in conformity with the geological feature in Hebei area.