Strange Lights in the Night Sky

On a recent night when I expected to see the aurora lighting up the skies over Duluth, I got a surprise.  Rather than seeing the northern lights, I captured this unique image, for which I have no explanation.  I took many shots that night, but only this one has what appears to be lights in the sky over the Blatnik Bridge and the harbor.  Other than cropping the image, doing a bit of sharpening and noise reduction, I’ve done no other editing.

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