By Gus Saltonstall

Aurora borealis, otherwise known as the northern lights, was spotted and photographed over the Upper West Side on Tuesday night.

The lights were caused by a “severe geomagnetic storm.” NASA classified the storm as a G4 level, which is just one down from the highest possible level of geomagnetic storm.

The lights were spotted across the east coast on Tuesday, and forecasters predict New Yorkers will have another chance at seeing the lights on Wednesday night.

Here is how Gus Hobbs, who photographed the lights over the Upper West Side on Tuesday night, explained his process to West Side Rag.

“When I heard about the impending auroras last night, I set up my camera on my roof on West 74th St and put it on a timer overnight,” Hobbs wrote in an email. “I was able to c

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