Geomagnetic storms occur when charged particles from the sun collide with Earth’s atmosphere, creating auroras.

NOAA forecasters warn of severe geomagnetic storms reaching Earth Tuesday night, potentially affecting technology while creating spectacular aurora displays.

NOAA’s Space Weather Prediction Center says the northern lights could be visible across much of the northern US on Wednesday ...

A severe geomagnetic storm put the power grids in at least 11 states at risk this week, posing a threat to millions.