NOAA’s Space Weather Prediction Center issued a geomagnetic storm warning for a K-index of 4 late on September 25. At that ...

New research led by NASA Goddard found persistent “erroneous measurements” skewing past estimates for how severe geomagnetic storms can get. Reading time 3 minutes Cataclysmic solar storms may be rare ...

The sun does not need to aim directly at Earth very often to cause real damage, but on the rare occasions when it does, the consequences can outlast the storm itself by months or years. A solar ...