A rare and fast CME triggered a severe G4 geomagnetic storm, producing brilliant auroras seen across Europe and the U.S. under ideal dark sky conditions.

A NOAA forecast has Northern Lights visible in northern U.S. states overnight on Monday, Jan. 19 through Tuesday, Jan. 20, as a “full-halo” CME heads to Earth.

Go somewhere dark and look up. You might just see something wondrous!