A light, 4.1-magnitude earthquake struck in Southern California on Sunday, according to the United States Geological Survey.

A series of earthquakes has rattled the Pacific Northwest in recent weeks, raising concerns. A local expert says it's nothing ...

The Alaska Volcano Observatory said signs indicated a Mount Spurr eruption was likely, though not certain, in the weeks or ...

"Solar heat drives atmospheric temperature changes, which in turn can affect things like rock properties," the researchers said.