Volcanoes

The volcano on Reykjanes peninsula in Iceland began erupting on Monday (Dec. 18).

A seamount sitting on a subducting tectonic plate off the coast of Japan and plowing its way into Earth's mantle may be at the root of several magnitude 7 earthquakes in the past 40 years.

Supervolcanoes are defined by their ability to produce supereruptions — explosions of more than 240 cubic miles of volcanic material. But scientists disagree on how useful the term is.

An underwater volcano that gave birth to a new island off Japan's Iwo Jima island has erupted again, sending huge plumes of ash and smoke into the sky in footage released by Japan's Coast Guard.

A 2,000-foot-long hydrothermal field teeming with life and giant chimneys spouting boiling water has been discovered next to an underwater volcano off the coast of Ecuador.

Almost two weeks after the town of Grindavík was evacuated over fears of a volcanic eruption, the magma dike beneath Iceland still poses a high risk, with earthquakes and ground deformation ongoing.

Magma building beneath Iceland may break through the surface in a volcanic eruption, sending lava flows toward the Blue Lagoon, the Svartsengi geothermal power plant and the town of Grindavík.

Explainer Experts have warned that an underground magma tunnel between a pair of Icelandic towns could erupt at any moment. But what will this eruption look like? And how far-reaching will its effects be?

Iceland's volcanic activity is generally tame compared with explosive eruptions along the Pacific's Ring of Fire. This time, it's shaking up a town.

Four huge deposits from supervolcano eruptions over the last 40,000 years have been discovered at the bottom of the Mediterranean Sea.