The Aurora Borealis; or Northern Lights, near Blackduck, MN during the early morning hours of July 15 2012. These aurora displays were part of a moderate (G2) Geomagnetic Storm. Such storms can disrupt power grids and interfere with GPS signals and other satellite operations.This storm is the result of an X-1.4 solar flare launched from a sunspot on the 12th of July.
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