Yellowstone eruptions may be driven by shifts in Earth's crust, rather than a deep well of magma, study finds.

An underwater volcano off the coast of Oregon is gearing up for an eruption, according to volcanologists who are monitoring for activity. The Axial Seamount-- an underwater volcano located about 300 ...

LOS ANGELES — A mysterious and highly active undersea volcano off the Pacific Coast could erupt by the end of this year, scientists say. Nearly a mile deep and about 700 miles northwest of San ...

Tiny crystals suggest extinct volcanoes could still grow underground, a finding that could reshape how scientists assess ...