The northern lights are forecast to illuminate skies across 21 US states on Monday night, 11 November, following three powerful coronal mass ejections (CMEs) from the Sun, according to the U.S. National Oceanic and Atmospheric Administration (NOAA).

Geomagnetic storms brought the northern lights to much of the U.S. this week, painting the sky in vibrant hues of green and pink. "Well, we had activity tonight — a lot of geomagnetic storm activity," Shawn Dahl,