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February 21, 2020 Weak Auroral Glow (barely)

Aitkin and Itasca Counties, Minnesota

Bz was generally south, up to -6 nT in the evening, so I brought my camera along on a snowmobile trip from Sturgeon Lake to Grand Rapids. I really expected to see an auroral arc along the northern horizon, but I could not pick one out. VIIRS imagery showed there should be auroras, but I could see, at best, a hint of green along the horizon.

Nice Auroras
Just north of Palisade, MN, looking north at 10:38 PM.  The light pollution on the horizon is Grand Rapids.
Nice Auroras
Just north of Grand Rapids, MN, looking north at 1:00 AM.  There should be a brighter band of auroras here, but there is barely a green tint on the horizon. 
Nice Auroras
VIIRS imagery from 0625 UTC, about 35 minutes before my shot from just north of Grand Rapids. 

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