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

Campi Flegrei is speeding toward a transition, which will either cause an eruption or a change to its underground magma ...

The Alaska Volcano Observatory raised Kupreanof Volcano's alert level to Advisory and its aviation color code to Yellow on ...

One of the most explosive volcanoes in U.S. history began its eruption with a trickle, not a blast. Mount St. Helens' gas-laden magma oozed into the cone before the mountain finally erupted in 1980.

On May 18, 1980, Mount St. Helens erupted and claimed the lives of 57 people. Here is everything you need to know 46 years ...

Is a massive volcanic eruption about to wipe central Oregon off the map? If you spend much time on social media, you might ...

HONOLULU (AP) — Lava shoots high into the sky. Molten rock erupts from two vents simultaneously. The nighttime sky glows red and orange, reflecting the lava oozing across a summit crater. Scientists ...

Add Yahoo as a preferred source to see more of our stories on Google. Underwater volcano Axial Seamount. (National Science Foundation) An underwater volcano off the coast of Oregon that was forecast ...

Hawaii's Kīlauea volcano spewed lava nearly 1,400 feet into the sky during an eruption that ended early Christmas Eve morning, the U.S. Geological Survey (USGS) reported. The eruption, captured live ...