【作者】 王月华； 徐元芳；

【Author】 Wang Yuehua Xu Yuanfang (Institute of Geophysics,Chinese Academy of Sciences)

【机构】 中国科学院地球物理研究所；

【摘要】 本文根据我国及其邻近地区25个地磁台站的资料,分析了1969—1970年地磁场长期变加速度的脉冲变化,给出了相应空间分布特征.文中也列出了1950—1980年间我国地区地磁场零偏线位置的变化,零偏线的漂移方向在1970年附近的突然变化可能是长期变加速度脉冲的起因.更多还原

【Abstract】 The secular variation of three components of geomagnetic field is analysed by using the data from the 25 observatories over China and its adjacency.The acceleration impulse of the secular variation and its geographic distribution for this area are given here.These arc obviously different from those for Europe.That is the impulse strength of Xand Zcomponents much more than that of Ycomponent in China though only Ycomponent exhibited a sudden acceleration in Europe.更多还原