ABC 7 meteorologist explains what causes geomagnetic activity and when auroras might be visible farther south.

"This is the largest solar radiation storm in over 20 years," the Space Weather Prediction Center said on Monday.

Largest solar radiation storm in more than 20 years could trigger auroras on Earth - A solar radiation storm this large has not been seen since October 2003

A significant portion of the United States could be in for a treat on Monday night as conditions are expected to produce "auroral displays" visible in much of the country, bringing colorful displays of the Northern Lights (Aurora Borealis) to the night skies for Millions of Americans.

The storm could also impact power systems and spacecraft operations.

Earth's magnetic field was struck by a "severe" solar storm Monday (Jan. 19), triggering vibrant auroras in the U.S. and large parts of Europe. The storm broke a record that had stood for more than two decades.

A powerful flare unleashed a severe solar storm that caused auroras and GPS disruptions on Earth.

Solar flares are powerful bursts of radiation. A SWPC report added that the storm calmed and reached G4 status again on Tuesday.

A massive solar storm has created rare Northern Lights in regions where they’re rarely seen, marking the first event of its kind in 20 years. Experts are monitoring space weather and potential impacts on satellites and communications.