磁暴中的北极光-1

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前情回顾:3月12日,发生了一次X2.2级的太阳耀斑,其喷射方向比3月15日的全晕日冕物质抛射更对准地球,可极“出乎”监测及预测机构意料之外的是,3月15日的一次“毫不起眼”的CME竟然让地球于3月17日发生了历时12小时的大磁暴。

3月17日晚间,高纬度地区来了一场20年来最强大的极光爆发,极光指数达到了Kp 8.9!极强磁暴Dst指数达到了惊人的-221nT,仅次于最强的G4级,这是24周期以来最强的一次(次强是-147 nT,2011年10月25日)。整个高纬度地区都观测到了异常壮丽的极光!

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