The northern lights were visible Tuesday night across the Chicago area, illuminating the sky with brightly colorful displays due to severe solar storms.

Northern Lights may dazzle again tonight as a severe geomagnetic storm reaches peak intensity across regions. Follow live.

The last in a series of three coronal mass ejections hit Earth on Wednesday, so experts are keeping an eye on geomagnetic storm potential

The strongest solar storm in over 20 years continues, and a major boost on Wednesday afternoon could elevate this aurora experience to once-in-a-lifetime.

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.

The predicted speed of the third coronal mass ejection in the series was the highest he'd ever seen: about 870 miles per second. Conde said that although the best auroras were forecast for Tuesday and Wednesday, the lights could continue to shine for the next few days.

The northern lights could be visible from a much larger portion of the northern United States than usual on Tuesday night and Wednesday morning, according to the National Oceanic and Atmospheric Administration, as X-class flares from the sun days earlier impact the Earth.

For two nights, dazzling auroras delighted sky-gazers in unexpected places, including in the US as far south as Florida. The cause: dual solar storms unleashed by the sun reaching Earth. A severe storm was initially predicted for Thursday as well,

A G1 storm could bring potential Aurora sightings to Northern states like Alaska, Minnesota, Wisconsin, Michigan, and Maine; a G2 storm is a bit stronger and could potentially be viewed even further south, including Montana, Vermont, New Hampshire, Minnesota, Washington, North Dakota, South Dakota, New York, Idaho, Wisconsin, Wyoming, and Iowa.