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Strong G3 geomagnetic storm

A surprisingly strong geomagnetic storm hit Earth this morning. This is likely the earlier than expected arrival of a coronal hole solar wind stream. The NOAA SWPC reported strong G3 geomagnetic storm conditions and the Wing-Kp as well as Potsdam reported moderate G2 geomagnetic storm conditions. Today's header image comes from the talented Brian Drourr Photography who captured this amazing shot from Algonquin Provincial Park, Canada.

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Last X-flare:2017/09/10X8.2
Last M-flare:2017/10/20M1.0
Last geomagnetic storm:2019/01/05Kp5 (G1)
Number of spotless days in 2019:12
Current stretch spotless days:13

This day in history*

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52010M2.3
ApG
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*since 1994

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