澳门路环地区地磁场的环境及近期变化

Geomagnetic field environment and its recent strength variations in Luhuan Island of Macao

2002年5月,对澳门路环岛地区及相邻珠海横琴岛的地磁流动观测网的25个测点进行了地磁场总强度(F)的观测。同时还进行了地磁环境噪音的测量及十字剖面测量。2003年1月,对此流动观测网进行了复测。尽管该地区四周邻海,存在相当数量的干扰因素。但两次观测结果经通化处理后表明大多数测点的地磁场总强度的变化不大,变化量在1～2nT左右。两次观测结果的总体均方差为2 8nT。

We measured geomagnetic field strength (F) of 25 geodesic points, and geomagnetic ambient noise and cross profile of Mobile Geomagnetic Observation Network in Luhuan of Macao Island and Hengqin of Zhuhai Island in May 2002, and surveyed them again in Jan. 2003. Although the sea is around the area and there are a lot of interference factors, the results show the variations of geomagnetic field strength values about the most points are rather small, about 1～2 nT, and the total root-mean-square deviation is 2.8 nT.