【作者】 刘长发；

【Author】 Liu Ghangfa (Institute of Geophysics.Chinese Academy of Sciences)

【机构】 中国科学院地球物理研究所；

【摘要】 为了研究1983年6月11日日全食的地磁场效应,我们在巴布亚新几内亚的莫尔兹比港(Port Moresby)进行了地磁观测。经过资料分析,在消除当天的正常日变化和干扰变化后,日食效应比较明显,水平强度减小(-3.6±1.2nT),磁偏角偏东(0.6′±0.1′E),垂直强度增加(5.0±1.1nT)。证实了日全食引起地磁场强度和方向的变化,与食分、食甚持续时间、太阳高度角(即日食发生的地方时)及季节有关。更多还原

【Abstract】 The effects on geomagnetic field of the solar eclipse were observed at Port Moresby, Papua New Guinea during the solar eclipse on June 11,1983. The eclipse effects are distinct after eliminating the normal daily variation and disturbed variation of the eclipse day.The results show that the decrease of the horizontal intensity decrasecl (-3.6±1.2 nT),the declination deviated eastward(0.6′±0.1′E) and the vertical intensity increased(5.0±1.1 nT) It’s confirmed that the magnitudes and directions of the geomagnetic field are wriable,the variafions depend on the duration of the sclar eclipse,the elevation angle of the sun and seasons.更多还原