Huge lava fountains and plumes of ash were seen being sent high into the night sky over the weekend. Find out more here.

Smoke billows from the mouth of Mt. Shasta like a thunderous cough. Within moments, clear skies turn gray, and the sun vanishes behind thick, shifting layers of volcanic gas and ash. Visitors snap ...

In a true study in contrast, the course of a red-hot lava flow oozing down a snowy white mountainside has been mapped out in a newly-released NASA satellite image. Running down the slopes of Mount ...

Mount Etna, the rambunctious volcano on the Italian island of Sicily, grumbled back to life on Monday, spewing hot ash and lava in a pyroclastic flow, the nation's volcano monitoring body said. There ...

Lava is molten rock from a volcano that reaches the Earth’s surface. Liquid rock below the Earth’s surface is referred to as magma. More than 50% of the world’s active volcanoes above sea level ...

Italy's Mount Etna lays claim to several titles. It is: The world's most active "stratovolcano" Europe's largest and most active volcano One of the best-monitored volcanoes in the world One of the ...

If you’ve been following the ongoing eruption of Kilauea, you may have seen the terms “gas piston” or “gas pistoning” show up in some of the USGS Hawaiian Volcano Observatory updates, photo captions, ...

The Bárðarbunga volcano system was responsible for Iceland's largest eruption for 300 years back in 2014. After a recent increase in seismic activity, could it be about to erupt again? When you ...