active sunspot flare eruption
- Space
A Rare G4 Severe Geomagnetic Warning Threatens Global Satellites and Power Grids
The NOAA SWPC issued a G4 severe geomagnetic warning after an active sunspot eruption launched a massive plasma cloud.
The NOAA SWPC issued a G4 severe geomagnetic warning after an active sunspot eruption launched a massive plasma cloud.