Magma seeping into a reservoir under the island of Santorini set off thousands of quakes, some of which almost reached a 5.0 on the Richter scale.

In the Pacific Northwest, a surge of seismic activity has pushed one underwater volcano into what researchers describe as a very high likelihood of eruption, with some models putting the odds near 95 ...

Far below the Pacific Ocean, about 300 miles off the Oregon coast, lies Axial Seamount, the most active underwater volcano in ...

Beneath the waters off Papua New Guinea lies an extraordinary deep-sea environment where scorching hydrothermal vents and ...

The volcano near Naples is shaking the ground in a way that scientists say it hasn't for centuries, posing risks for hundreds ...