10-27-2016-planetary-k-index

Image: Planetary K (Kp) Index (3 hour data), begin: 2016 Oct 25 0000 UTC,” by NOAA/SWPC Boulder, CO USA, public domain. DESCRIPTION: Of the 23 three-hour bars on this bar graph, 16 are red, indicating solar storm indexes of from Kp=5 to Kp=7.

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