The northern lights can be seen most clearly at night in the dark away from the bright lights of a city, according to NOAA. The weather agency notes that moonlight can also diminish the appearance of the aurora borealis, adding that the moon doesn’t impact the actual brightness of the lights.

A severe geomagnetic storm could bring the northern lights and possible technological effects to the U.S. to start the week, NOAA’s Space Weather Prediction Center has warned. On Friday, a “powerful coronal mass ejection (CME) erupted from the Sun,