FHDZ-M15地磁组合观测系统OVERHAUSER探头对FGE探头的影响初探

Preliminary research on magnetic impact between the OVERHAUSER sensor and FGE sensor of the FHDZ-15 joint observing system

受记录室和观测系统自身因素的限制,FHDZ-M15地磁组合观测系统的OVERHAUSER磁力仪探头和FGE磁力仪探头相互之间存在一定的磁影响。本文在湖北省恩施地震台作了相互影响的模拟实验,结果表明,OVERHAUSER探头和FGE探头之间的相互影响与两者之间的距离和方位有关。当FGE探头和OVERHAUSER探头呈东西向放置时,影响水平较大,H分量表现更加明显,距离大于1.5m时,影响基本消失。

Under the condition of the record room and the observing system＇s own factors, the magnetic impact between the OVERHAUSER sensor and the FGE sensor must be exist. By the experiment in Enshi observatory, Hubei province, we can find that this kind of magnetic impact relates with the distance and the position between these two sensors. If they are follow the east-west direction, the level of influence is bigger, and the H component is more obviously. It is also found that as the distance is over 1.5 m, this influence is fade away.