The Northern Lights may be visible in parts of the US this weekend. Why are they so active now?
A series of solar flares and coronal mass ejections from the Sun have the potential to create dazzling auroras that can be seen as far south as Alabama and Northern California, but could also disrupt communications on Earth tonight and this weekend, according to the National Oceanic and Atmospheric The Administration's Space Weather Prediction Center.
The center, a division of the National Weather Service, has issued a severe geomagnetic storm warning for Friday evening. It is the first watch of ...