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April 26, 2012 Auroras

Lake Winnibigoshish at Bena, MN

 

Nice Auroras
Looking overhead-south some miniature auroras well south of the main band. I've often seen these referred to as proton arcs.
Nice Auroras
Non-contrast-enhanced version of the same image above. I underexposed the images a little with the camera.
Nice Auroras
Main band of auroras near the northern horizon.
Nice Auroras
More proton arc auroras overhead-south.
Nice Auroras
Clouds move in on the main band.

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