龙岩地震台地磁核旋观测与环境调查、分析报告

Observation of geomagnetic proton magnetometer in Longyan seismic station and environment survey as well as analysis report

龙岩地震台核旋观测室始建于 1 984年 ,1 985年 2月开始使用。室内建有三个仪器墩。长期来 ,探头一直放在最西边的墩上进行观测。 1 998年龙岩台核旋观测仪故障停测后 ,1 999年 1 2月新购回G - 85 6核旋观测仪 ,并于 2 0 0 0年 1月开始正式观测。由于使用G - 85 6核旋观测仪观测以来 ,H分量一直不稳定 ,Z分量测值也经常出现不稳定值 ,后改将探头放在中间墩上 ,观测结果Z分量测值稳定 ,而H分量测值仍不稳。从2 0 0 0年 7月 5日开始 ,进行加密观测 ,分析结果作者认为有仪器老化与不配套的原因 ,更重要的是环境变化的影响 。

The observe room of nuclear precession magnetometer in Longyan station was built in 1984,and in Feb,1985,it started to be used.There are three instrument frusta in the room.During a long term,the detect heads were put on the west frustum.In 1998,the instrument was stopped to observe for the instrument failure.In Dec,1999,we bought a new G-856 nuclear precession magnetometer and it started to observe on Jen 2000.But since observation start ,the H component has not be stable,Z component often appeared unstable values.Afterward,we put the detect head on the middle frustum,the observation results were that the Z component is stable,but H component still unstable.Since July 5,2000,we carried out intensity observation ,the analysis results were because the instrument is aging and not matching,more important,it is influence of environment change.After all,we presented the suggestions about that.