强太阳活动引起的电离层暴群及“暴群”的中低纬特性
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摘要
本文介绍了１９８９年３月一个罕见的强太阳活动区多次暴发引起的强烈电离层“暴群”，结合源耀斑等级、位置、总结了其日面位置自东向西旋转时，电离层暴群形态的规律变化，证实电离层暴扰动强度与耀斑位置有明显的中心子午线效应和东西向不对称性，综合１１５°部分地磁子午台链的北向分量和历史上的２次磁暴和４次电离层暴形态的分析，得到了暴群的中低纬特征，并对“弱扰动槽”的形成机制作了定性讨论。
in this Paper, the characteristics of severe ionospheric storm group generated by several extremly large solar flares occured in a super active region are analyzed in association with the location and importance of parent flares. The morphology of ionospheric storm changed systematically as the "are tegion rotated from the east to the west of heliographic central meridian, showing obviously the central meridian effect and the east-west asymmetry in the dependence of the ionospheric storm morphology at the flare location. The morphological character of the storm group was obstained by using the data of 7 ionosphetic storms in the Far East from April 1979 to March 1989and the north component of 6 geomagnetic storms at a mid-low latitude meridian chain of magnetometers of 115°E from February 1986 to April 1990. In addition the formation mechanism of the weak disturbance through geographical latitude 35° were also discussed briefly.
in this Paper, the characteristics of severe ionospheric storm group generated by several extremly large solar flares occured in a super active region are analyzed in association with the location and importance of parent flares. The morphology of ionospheric storm changed systematically as the "are tegion rotated from the east to the west of heliographic central meridian, showing obviously the central meridian effect and the east-west asymmetry in the dependence of the ionospheric storm morphology at the flare location. The morphological character of the storm group was obstained by using the data of 7 ionosphetic storms in the Far East from April 1979 to March 1989and the north component of 6 geomagnetic storms at a mid-low latitude meridian chain of magnetometers of 115°E from February 1986 to April 1990. In addition the formation mechanism of the weak disturbance through geographical latitude 35° were also discussed briefly.
引文
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