NOAA projected Saturday night’s northern lights would have a Kp index of 3, a measure of the aurora’s strength on a scale of ...

A spot on the sun’s surface will likely disrupt Earth’s magnetic field, pulling the phenomenon to more states, forecasters ...

Thursday may be the last day people in the northern U.S. could see the phenomenon this week, forecasters said.

ToplineThe aurora borealis may be visible again to several states along the Canadian border on Thursday, and it may be the ...