Seismologists monitoring the seafloor here detected more than 2,000 earthquakes erupting within just one day.

Discover the magic of Sete Cidades, where an ancient volcano became a pair of crystal lakes surrounded by lush green hills.

A debate is stirring in Southwest Washington over how to manage ongoing impacts from the 1980 eruption of Mount St. Helens. This year marks 45 years since that cataclysmic eruption. When the volcano ...

Hawaii's Kilauea volcano resumed erupting Friday by shooting an arc of lava 100 feetinto the air and across a section of its summit crater floor. It was Kilauea's 31st display of molten rock since ...

Let’s take a look at 10 trails that trace those forces—but remember, some of these magmatic marvels are merely napping. It’s ...