After a long, long summer day, Arctic skies are darkening again, and in the sunset observers are seeing rays of green in the twilight blue

sunsetauroras_strip

“I went out last night to catch the sunset–but mostly the auroras,” says Olsen. “Even before it was dark, the Northern Lights made an appearance.”

More lights are in the offing. NOAA forecasters estimate a 20% of polar geomagnetic storms during the next 24 hours. The odds of Arctic auroras are higher, however, because it doesn’t take a full-fledged storm to turn the twilight green at polar latitudes. Now is a good time to book a tour. Aurora alerts: text, voice

http://spaceweather.com/

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