改善瀑布沟水库数字地震台网定位精度的办法
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摘要
利用2006年12月至2007年2月共3个月瀑布沟水库数字地震遥测台网资料,与四川省地震台网的资料用同一定位方法(LOC91)进行对比;后又将四川省地震台网的一些子台资料加入水库台网中,再用LOC91进行定位。经过对比,四川区域台网资料和瀑布沟水库数字地震遥测台网的资料,对该网内地震的定位精度较高,而网缘外的地震若只用水库台网的资料定位则不尽然。瀑布沟水库数字台网一期工程各台的台间距小(台间距约5千米),对网外地震,在定位时张角就拉不开,有时仅有四分之一的张角(甚至更小),因此定位精度不高。若把四川省区域台网的一些子台加入水库台网地震观测资料中,台站基本上"包围"地震,则定位精度就可得到提高。
We use the LOC 91 program to locate the earthquakes recorded for 3 months by the Digital Earthquake Monitoring Network of Pubuguo Dam from December 2006 to February 2007.Then we compare the earthquake location parameters with ones from the Digital Earthquake Monitoring Network of Sichuan Province.Our comparative results show that for the earthquakes occurred in the area covered by the substations of the Digital Earthquake Monitoring Network of Pubuguo Dam,their locating precise are high but for the earthquakes occurred out of the area covered by the Digital Earthquake Monitoring Network of Pubuguo Dam are not high.If we add the record data to the data set from the Digital Earthquake Monitoring Network of Pubuguo Dam to locate the earthquakes,the locating precise will be better.
We use the LOC 91 program to locate the earthquakes recorded for 3 months by the Digital Earthquake Monitoring Network of Pubuguo Dam from December 2006 to February 2007.Then we compare the earthquake location parameters with ones from the Digital Earthquake Monitoring Network of Sichuan Province.Our comparative results show that for the earthquakes occurred in the area covered by the substations of the Digital Earthquake Monitoring Network of Pubuguo Dam,their locating precise are high but for the earthquakes occurred out of the area covered by the Digital Earthquake Monitoring Network of Pubuguo Dam are not high.If we add the record data to the data set from the Digital Earthquake Monitoring Network of Pubuguo Dam to locate the earthquakes,the locating precise will be better.
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