A major U.S. city is under threat from a potential volcanic eruption after more than 20 earthquakes were recorded in Alaska.

Axial Seamount, a volcano hundreds of miles off the coast of Oregon, may be a problem in the near future. This underwater ...

Over the Sierra crest — about 150 miles to the east of Manteca, Oakdale, and Turlock — is one of the world’s largest active ...

A mile-wide volcano has experienced hundred of earthquakes in the last few days. Scientists have warned that an eruption is ...

An explosion on Mount Spurr could generate massive cloud of ash, which could mess with airplanes and cause issues for humans.