According to observation data at geomagnetic stations in Hebei Province from 1986 to 2005, we sum up and analyze the laws of the geomagneticsecularvariation in this paper.
利用河北省地磁台1986 ~ 2005年的地磁观测资料，对该地区地磁场长期变化规律进行总结分析。
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According to the observation data at Guangzhou geomagnetic observatory from 1958 to 1995, we summarize the laws of the geomagneticsecularvariation in Guangzhou geomagnetic observatory.
With geomagnetic field model records, several kinds of secularvariation of geomagnetic dipole moment and the position of the geomagnetic North Pole during the year 0 ~ 2000 a.