利用已知爆破优化河南地震台网地震定位方法

Optimization of earthquake location method for Henan Earthquake Networks using existing blasting data

利用2020年1—5月期间河南省地震构造探查工程项目实施的9次人工爆破资料,来检验“2015河南模型”和“华南模型”在河南地震台网的地震定位效果以及M_(S)DP地震分析软件中单纯型、Hyposat和LocSAT3种地震定位方法的精度。结果显示,“2015河南模型”地震定位震中偏差较“华南模型”小,基于“2015河南模型”对比以上3种定位方法给出的定位结果,单纯型定位法计算的震中位置与实际爆破位置偏差最小。综合分析认为,在日常地震速报和编目工作中,“2015河南模型”配合单纯型定位法可作为河南地震台网地震定位的首选方法。

Using 9 artificial blasting earthquakes from the seismic structure exploration project in Henan Province from January to May 2020,the earthquake location effect of the“2015 Henan Model”and the“South China Model”in Henan Earthquake Networks were tested,as well as the precision of 3 earthquake location methods such as Simple,Hyposat,and LocSAT in the MSDP seismic analysis software.The results show that the epicenter deviation of the“2015 Henan Model”earthquake location is less than that of the“South China Model”.Based on the comparison of the location results given by the above three location methods using the“2015 Henan Model”,the epicenter location calculated by the simple method has the smallest deviation from the actual blasting location.Comprehensive analys is shows that the“2015 Henan Model”combined with the simple method can be used for earthquake location in Henan Earthquake Networks in daily earthquake rapid reporting and cataloging work.