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The aurora borealis, or northern lights, fill the Northland sky at 11:30 p.m. Thursday, in this view north of Duluth, Minn. (Bob King / rking@duluthnews.com)

Northern lights put on a show in northern Minn. skies

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A brilliant display of the northern lights filled skies across the Northland late Thursday and early Friday.

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Where skies cleared, late-night and early morning watchers were treated to rays, arcs and curtains dancing in the sky.

"When I first saw the aurora doing its crazy moves in twilight I knew we were in for something special. The northeastern sky – still dusky blue – lit up with multiple rays and arcs. It only got better as darkness settled in," News Tribune photo editor Bob King wrote on his Astro Bob Areavoices blog early Friday morning. "The show went on and on and on. Right when you thought nature would call it a wrap, the aurora charged up again."

The display, sparked by the Earth passing through the magnetic field of the solar wind, continued until it was washed out by brightening skies at dawn.

More northern lights displays are possible tonight, though they are notoriously difficult to predict.

For more photos of last night's display, for more information about the northern lights and for updates on aurora forecasts, visit the Astro Bob blog.

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