Jack William Bell#Aurora update: Another 3 hour level recording is out from the NOAA and it's not good news for those of us in North America hoping to see more northern lights tonight.
Although still greater than the prediction, the 18:00 to 21:00 UTC measurement is G3. If this trend continues it will be down to G2 or G1 in the six hours before full dark on the east coast of NA.
But then who knows? I'll update again in a few hours once we get another recorded level from NOAA.
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