兰州区域数字地震遥测台网常用近震定位程序的定位效果分析

Effectiveness Analysis on Some Seismic Location Programs for Near Shock Used in Lanzhou District Digital Telemetered Seismic Network

对兰州台网2002年1月1日至2002年10月31日网内、网缘共100次2.0≤ML≤4.3以上地震事件的Hypo81、Genetic、NearLoc三种定位程序的定位结果作了研究分析,结果表明:NearLoc程序的定位效果明显优于其它两种定位程序,其使用范围广,对网内、网缘以及网外1 000 km以内的地震都有较好的定位效果。

The seismic location results for 100 earthquakes events with 2.0≤ML≤4. 3 from Jan. 1, to Oct. 31, 2002,recorded by Lanzhou District Digital Telemetered seismic network, using 3 defferent locating program Hypo81,Gentic and Nearloc,is analyzed and compared. The result shows that the locating effectiveness of Nearloc program is obviously better than other two programs. Nearloc has good locating effectiveness for events which took place both inside the network and outside edge of the network to 1,000 km,so it can be used widely.