Conditions were right the second night in a row for an incredible display of the northern lights at Boulder Lake, north of Duluth.
Photographer Derek Montgomery captured it in photos and a time-lapse video.
An intense but brief display lit up around 9 p.m. on Tuesday evening. At Boulder Lake, green lights rolled, rippled, blew up and collapsed.
The display danced across the northern sky for about 30 minutes before subsiding into a green glow for much of the rest of the night.
For those interested in the photo geek details, Montgomery recorded 402 images at 24 frames per second (with a couple brief stops to check exposure) between 9:36 pm and 11:42 p.m.
The lights are predicted to be spectacular Wednesday night, too.
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