【摘要】 利用地震图上量得的S——P时间差,导出计算机定位直接搜索法中的准则函数,对1976～1987年的地震进行重新定位,共得到184次弱震的震源位置及各次地震的虚波速度值。同时对其中的108次地震进行了误差分析。此外还对铜川爆破和1978年2月11日石泉4.2级地震作了考察分析。更多还原

【Abstract】 Using S-P time differences measured from seismograms,we have derived the criterion function through direct searching method by means of computer. The earthquakes from 1976 to 1987 have been relocated,obtaining the epicentral locations for 184 weak earthquakes and the imaginary wave velocity of each earthquake. 108 out of 184 earthquakes have passed error analysis, and from which we know that the mean error of epicentral locations is about 8. 84 km and source depth is about 5. 6 km. Finally,we have examined Tongchuan explosion and Shiquan earthquake (Ms= 4. 2,on Feb. 11,1978)更多还原