1990—1991年中国地区主磁场变化——全国地磁台站资料质量分析结果

The variation of main geomagnetic field in China for 1990-1991 The results of the analysing data quality for the geomagnetic observatories in China

根据全国地磁台站资料质量评审中提供的信息,对全国台站1990-1991年地磁场三分量的年均值进行了分析,给出了年变率分布特征及相应的等值线图。

According to the information provided by evaluation of data quality for all geomagneticobservatories,the annual mean of three components of geomagnetic field 1990-1991 are ana-lysed.The characteristic of annual rate of change and corresponding isopore map are prese-nted here.