Most volcanoes form at the boundaries of Earth's tectonic plates, which are huge slabs of crust and upper mantle that fit together like puzzle pieces. Think of these plates as massive rafts floating ...

Venus—a hot planet pocked with tens of thousands of volcanoes—may be even more geologically active near its surface than previously thought. New calculations by researchers at Washington University in ...

Mount Etna is more than half a million years old, but this massive stratovolcano in Sicily still has plenty of gas left in the tank. The 3,400-meter behemoth is the most active volcano in Europe, ...

Can a volcano erupt after tens of thousands of years of dormancy? If so, how can this be explained and what makes volcanic eruptions more dangerous? These are key questions in volcanic hazard ...

Scientists have discovered evidence of two hidden magma sources beneath Nicaragua’s Masaya volcano, where satellite observations revealed mysterious ground movements suggesting magma is shifting deep ...

Tides flowing in a subsurface ocean of molten rock, or magma, could explain why Jupiter’s moon Io appears to have its volcanoes in the “wrong” place. New NASA research implies that oceans beneath the ...

The 1980 eruption cycle made Mount St. Helens one of the most famous and now best-monitored volcanoes in the Cascades. But it is far from the only volcano in the range. From southern British Columbia ...