A G4 geomagnetic storm is considered "severe" and may have the following effects, as listed by the NOAA Space Weather Scales: Power systems: Possible widespread voltage control problems and some ...

The geomagnetic storm is expected to be a G4 class, according to the scale used by the U.S. National Oceanic and Atmospheric Administration (NOAA)'s Space Weather Prediction Center (SWPC).

The "severe" G4 geomagnetic storm sparked auroras across the U.S. on Thursday night, with less powerful but still significant solar storms expected to continue throughout Friday.

In March, a geomagnetic storm briefly reached G4 strength for a few hours. Advertisement. That event was the third geomagnetic storm to reach G4 status during the current 11-year solar cycle, ...

Geomagnetic storm sends 5 coronal mass ejections to Earth : ... NOAA uses a five point scale to rate these storms, and this weekend's storm is a G4.

While geomagnetic storms reaching G4 strength have been known to bring the northern lights to much of the country — at times as far south as Alabama and northern California — it’s unlikely ...

If you've never heard of a solar storm or geomagnetic storm, chances are you'll learn about those really quickly this weekend. Earth is under a severe G4 watch or geomagnetic storm watch for the ...

WEEK. IT’S A WARM ONE OUT THERE, A GEOMAGNETIC STORM WATCH HAS BEEN ISSUED FOR THE FIRST TIME SINCE JANUARY OF 2005. THIS MEANS A SEVERE GEOMAGNETIC STORM IS STILL LIKELY THROUGH THE WEEKEND ...

A "severe" G4 geomagnetic storm could make auroras visible across the country Thursday, according to forecasters with National Oceanic and Atmospheric Administration.Here's what we know about the ...

Geomagnetic storms reaching G4 strength have been known to bring the northern lights into southern parts of the U.S., but that might not be the case this time.

Keep reading to learn when the G4 geomagnetic storm is expected to hit Earth, and where you need to be to get a glimpse at the magnificent auroras it will undoubtably produce.