Scientists have uncovered a long-missing piece of the volcanic puzzle: rising magma doesn’t just form explosive gas bubbles when pressure drops—it can do so simply by being sheared and “kneaded” inside a volcano’s conduit.

Learn how stress inside a volcano can make gas bubbles form early, helping explain why some eruptions stay quiet instead of exploding.

The explosiveness of a volcanic eruption depends on how many gas bubbles form in the magma—and when. Until now, it was thought that gas bubbles were formed primarily when the ambient pressure dropped while the magma was rising.

Klyuchevskoy volcano in eastern Russia began erupting shortly after a powerful 8.8 magnitude earthquake and several aftershocks shook the same area. "A descent of hot lava is observed on the western slope," the Geophysical Center of the Russian Academy of ...

Tourists and locals appear to be flocking to watch an erupting volcano just outside of Iceland's capital of Reykjavik, which is near the site of another major eruption that spewed magma for months last year. The site is around 25 miles from the capital ...