Volcanoes are formed when magma (liquid rock) trapped underneath the Earth’s crust rises to the surface and escapes through cracks. The space for the magma to leave is very small and ...

The graphic below shows how the movement of the Earth's tectonic plates causes volcanoes to be formed, and what triggers a volcanic eruption.

The Kilauea volcano has been erupting on and off since December 2024. In February 2025, lava started shooting up into the air ...

The seismic activity of Axial Seamount, a submerged volcano roughly 300 miles off the coast of Oregon and more than one mile beneath the sea’s surface, has been increasing with hundreds of small ...

An curved arrow pointing right. A 42-square-mile crater called a caldera formed atop Iceland's Bardarbunga volcano during the 2014-15 eruption. Scientists recorded the event and now think they ...

All of those active volcanoes form over or in a subduction zone environment. The same types of processes that result in volcanic eruptions are processes that form gold deposits," explains Adam ...

Igneous rocks form when magma cools underground or erupts at the surface as lava. The magma rises into the Earth’s crust, where it can get trapped underground or erupt from volcanoes as molten lava.