The effects of a coronal mass ejection—a bubble of plasma that bursts from the sun’s surface—will likely impact Earth’s magnetic field on Saturday, bringing the northern lights to several northern U.S. states, according to the National Oceanic and Atmospheric Administration.

Another display of the northern lights could be visible this weekend in several U.S. states following a severe solar storm. The National Oceanic and Atmospheric Administration Space Weather Prediction Center forecast a planetary K-index -- which characterizes the magnitude of geomagnetic storms - of five out of a scale of nine for Friday and Saturday,

The agency expects a minor or greater geomagnetic storm—a disturbance of Earth’s magnetic field—on Saturday, which increases the likelihood of northern lights displays being visible to more people, as the effects of a recent coronal mass ejection reach Earth, according to NOAA’s three-day forecast.

Millions of Americans could witness the stunning solar light show in different states over the weekend as a higher-strength geomagnetic storm passes overhead.