Millions across the U.S. and Europe witnessed rare, colorful displays of the northern lights on Tuesday and Wednesday after three bursts of plasma from the Sun triggered a powerful geomagnetic storm.

E arth is preparing for a multi-day barrage of solar material, with the most severe space weather impacts now forecast for November 11 and 12, a direct consequence of consecutive X-class solar flares, as per Space Weather. The solar flares would result in beautiful auroras and possible geomagnetic storms on the two days.