广东两套数字化地震台网系统双差定位结果的比较——以广东阳江地区为例

Comparison of Double-Difference Location Results of Two Sets of Digital Seismic Networks in Guangdong Province-a Case Study of Yangjiang

根据2007年6月至2008年5月广东省"九五"、"十五"两套数字化地震系统记录到的广东阳江地区数字地震资料,利用双差定位法重新对阳江小震进行定位,结果表明,"十五"系统由于台站密度更大、布局更为合理,地震定位测定误差比"九五"系统显著降低,且无论水平方向还是垂直方向定位结果都更为集中。

Based on digital seismic records in Yangjiang region recorded by two sets of digital seismic systems constructed in Ninth and Tenth Five Years Plans of Guangdong province from June 2007 to May 2008 and the double-difference location method, we re-located small earthquakes in Yangjiang. The result shows that the measurement deviations of earthquake locations of the Tenth Five Years Plan system are reduced obviously owing to the larger density and more reasonable layout of stations, and the location results are more concentrated in both horizontal and vertical directions compared to the Ninth Five Years Plan system.