磁通门在普通山洞观测数据分析

Analysis of the fluxgate observation data in ordinary cave

为了解在普通山洞内放置磁通门磁力仪进行地磁观测的可行性,对泰安地震台观测山洞与地磁观测室并行观测的GM4数据,分别从日变化数据的相关系数、日变幅、日均值、子夜均值、高压直流干扰等方面进行对比分析。结果表明,普通山洞内的观测数据日变幅小于地磁房记录数据,但日变形态、子夜均值等一致性较好,可以作为地磁观测的一种补充方式。

In this paper, the experiment of fluxgate magnetometer observation in ordinary cave in Taian station is introduced. Analysis on data of fluxgate in observatory cave and geomagnetic observation room in Taian, respectively, on aspect of correlation coefficient of diurnal variation diurnal variation amplitude, daily mean value, mean value of midnight, and high voltage DC interference, are carry out. The result of comparative analysis shows that, the diurnal range of observation data in ordinary cave is less than that in the geomagnetic observation room, while the daily variation of mean, midnight mean are very well consistent. in the analysis of prediction, can adopt the suitable method, such as vertical component ratio of daily variation, geomagnetic loading-unloading response etc. The observation of fluxgate magnetometer in ordinary cave is feasible, can be used as an accessorial way of geomagnetic observation.