A severe geomagnetic storm has reached Earth and is expected to continue through the weekend, the National Oceanic and Atmospheric Administration's Space Weather Prediction Center said Friday.

They can vary in color depending on the species of atoms being ignited, but tend to give off a green hue from oxygen, and a blue, pink and purple light from nitrogen in the atmosphere. The ...

The lights were seen as the NOAA Space Weather Prediction Center issued a geomagnetic storm watch for the first ... Alert Weather page of a pink and purple glow in the sky that could be seen ...