MSDP软件定位方法应用对比

SEVERAL LOCATION METHODS AND THEIR APPLICATION IN MSDP

利用地震和爆破资料从震中位置、深度及残差3个方面对MSDP软件中3种定位方法进行定位对比分析。结果表明:HYP2000定位方法定位网内地震和其它2种方法相比:地震震中更接断层,落实的定点爆破平均值明显小于其它两种方法。定位地震深度分布较为均匀,但爆破深度全部分布在0—5km。进一步分析地震深度与宁夏地区地壳速度结构发现地震深度与速度结构明显相关,地震发生在高速—低速转换地区。

In this paper, we analyzed three location methods in MSDP comparatively by using epicenter position, depth and residual data of earthquake and blasting in Ningxia area. The results show that hyp2000 is better than the other two. The reasons are as follows： epicenter of earthquake located with hyp2000 is closer to fault; and blasting position is closer to the real place as we survey in the field; and depths of earthquakes are more well-distributed, while the depths of blastings are almost all distributed between 0 and 5 kilometers. Furthermore, we found that earthquake depth is related to velocity structure of Ningxia area, and earthquakes always happened in high-low velocity transition zone.