Early Sunday morning, G4 geomagnetic storm conditions had been reached. Such strong conditions have been known to bring the northern lights as far south as Alabama and northern California.

The CME arrived at Earth on Sunday, producing a "severe" (level G4 out of G5) geomagnetic storm, causing disruptions to the planet’s magnetosphere and triggering displays of Northern Lights as ...

Early Sunday morning, G4 geomagnetic storm conditions had been reached. Such strong conditions have been known to bring the northern lights as far south as Alabama and northern California.

"The G4 (Severe) geomagnetic storm watch remains in effect for tonight, June 1st (EDT), as CME passage continues," the Space Weather Prediction Center said in a 2 p.m. alert on June 1.

The National Weather Service’s Space Weather Prediction Center (SWPC) has issued a “severe geomagnetic storm watch,” the first such watch issued in nearly 20 years.

We saw another G4 geomagnetic storm a few months after the G5 storm, which caused the northern lights to only be visible to cameras in Metro Atlanta.

During severe (G4) Geomagnetic Storms, the lights could be seen as far south as the Gulf Coast. Find more updates on this story at FOXWeather.com. Air and Space Severe Weather U.S. News ...

During severe (G4) Geomagnetic Storms, the lights could be seen as far south as the Gulf Coast. Find more updates on this story at FOXWeather.com. Air and Space Severe Weather U.S. News ...

"The G4 (Severe) geomagnetic storm watch remains in effect for tonight, June 1st (EDT), as CME passage continues," the Space Weather Prediction Center said in a 2 p.m. alert on June 1.

Geomagnetic storms are classified on a scale of one through five, with G3 and higher indicating a strong storm. A G4 storm, like the one that was observed in late May and early June can cause a ...

A severe geomagnetic storm could bring the northern lights and possible technological effects to the U.S. to start the week, NOAA's Space Weather Prediction Center has warned.

Geomagnetic storms are classified on a scale of one through five, with G3 and higher indicating a strong storm. A G4 storm, like the one that was observed in late May and early June can cause a ...