Hidden in the Pacific, two very different volcanoes are forcing scientists to rethink what counts as “biggest.” Tamu Massif, ...

Axial Seamount is situated 300 miles off the Oregon coast and is getting closer to erupting for the first time in 10 years.

Add Yahoo as a preferred source to see more of our stories on Google. Deep in the south Pacific Ocean, near the remote Solomon Islands, there’s a volcano unlike any other on earth. For one, it’s ...

SAN FRANCISCO — Though volcanoes dot the face of the planet and can be found on every continent, researchers say most of Earth's volcanic eruptions happen in a dark and faraway place: deep underwater.