NOAA's Space Weather Prediction Center (SWPC) said that the severe (G4) geomagnetic storm could affect the power grid, as ...

The northern lights could be visible starting Thursday, and power and communications systems could see impacts from what ...

A G4 'severe' geomagnetic storm is approaching Earth and could affect radios and satellites as Hurricane Milton moves through ...

A powerful G4 geomagnetic storm ... classifies geomagnetic storms using a G-scale that measures their intensity, ranging from G1 for minor storms to G5 for the most extreme ones.

According to the SWPC, the “major disturbance in Earth’s magnetic field” was expected to reach G4 strength. The SWPC uses a five-point scale to categorize a geomagnetic storm’s strength.

The global geomagnetic storm on May 10 was predicted to be a G4, but it reached G5 strength. NOAA predicts geomagnetic storm conditions may continue through Tuesday, Sept.17, though space weather ...

More U.S. states may get another chance to see the Northern Lights after a severe G4 geomagnetic ... storm was one of the most severe solar storms the continental U.S. has seen since May’s ...

which was when the northern lights were vivid overhead and a rare G5 Geomagnetic storm was observed. Up to G4 Geomagnetic storming is occurring Monday evening. We also look at the Kp Index when ...

Parts of Minnesota, Wisconsin, Washington and several other states in the Lower 48 were treated to a beautiful aurora show Monday night amid a "severe" (G4) geomagnetic storm. Charged particles ...