The geomagnetic storm caused by the biggest solar flare so far this year created quite the rare and colorful sky show overnight for Canadians and those in the most-northerly parts of the U.S.
These three images of northern lights, or aurora borealis, were shot Thursday near Yellowknife, in the Northwest Territories of Canada.
The storm didn't appear to disrupt major electrical or technological operations on Earth, though NOAA's Space Weather Center said it got stronger early today before it faded again.
Forecasters said it was possible to see the lights from Iowa and Pennsylvania.
Below, the northern lights can be seen over the Russian Orthodox Saint Nicholas Memorial Chapel early this morning in Kenai, Alaska.