The explosiveness of a volcanic eruption depends on how many gas bubbles form in the magma—and when. Until now, it was ...

For decades, volcanologists believed that the primary trigger for explosive eruptions was a drop in pressure as magma rises ...

Scientists have uncovered a long-missing piece of the volcanic puzzle: rising magma doesn’t just form explosive gas bubbles ...

Scientists have discovered that shear forces inside rising magma can create gas bubbles long before pressure drops occur. The ...

A volcano in northern Ethiopia erupted Sunday, marking its first known eruption in 12,000 years. The volcano, called Hayli ...

The volcanic ash cloud is made of tiny, sharp particles of rock, minerals and volcanic glass. The formation of the particles ...

Underwater volcanoes are powerful geological forces shaping our planet and oceans. These hidden giants form through tectonic activity and magma rising from Earth's depths. While most eruptions are ...

A new study explains why even gas-rich, supposedly explosive volcanoes sometimes erupt quietly instead of blowing apart.

The physics of java and lava are actually quite similar, at least when it comes to bubbles, according to a surprising study.

Hikers visiting the Kilauea Iki crater in Hawaii today walk along a mostly flat surface of sparsely vegetated basalt. It looks like parking lot asphalt, but in November and December 1959, it emitted ...

An odd-looking cloud formation over Mount Rainier drew curious eyes from social media users Wednesday as the volcano looked as if it was giving a warning before some sort of event, but experts quickly ...

A large formation of granite discovered below the lunar surface likely was formed from the cooling of molten lava that fed a volcano or volcanoes that erupted early in the Moon's history -- as long as ...