摘要
海口马鞍岭火山综合观测台与琼中基准地磁台相距约86km，前者将GM4磁通门磁力仪安装在特制的弱磁性大理石箱体中，开展地磁场D，H，Z三分量相对观测；后者将Flearplus和Over—hauser磁通门磁力仪安装在无磁性地磁房中，开展F总场绝对观测和D，H，Z三分量相对观测。通过两个台站D，H，Z三分量变化场的相关对比分析，相关系数皆达到0．98以上。这说明，在火山区开展地磁相对观测是可行的，而采用弱磁性大理石箱体安放磁通门磁力仪进行地磁相对观测具有很高的推广价值。
The distance between Maanling multidisciplinary volcano observatory, Haikou and Qiongzhong standard geomagnetic station is about 86 km. At the first station, a GM4 fluxgate magnetometer is installed in the tailor-made marble box with weak magnetism and measures the relative values of D, H and Z components of geomagnetic field. While at the second station, the Flearplus and Overhauser fluxgate magnetometers are installed in a chamber without magnetism and measure the absolute value of total intensity F and the relative values of D, H and Z components of geomagnetic field. Through the correlation analysis of the variation of the D, H and Z components measured at two stations, it is found that the correlation coefficients are as high as 0.98. It suggests that the relative survey of geomagnetic field in volcanic area is feasible and the method that relative measurement of geomagnetic field with a fluxgate magnetometer installed in a marble box of weak magnetism is highly valuable for generalization.
出处
《地震地磁观测与研究》
2009年第2期83-88,共6页
Seismological and Geomagnetic Observation and Research
关键词
地磁
相对观测
相关分析
火山区
geomagnetism, relative measurement, correlation analysis, volcanic area
