Fluid inclusions in volcanoes are dominantly composed of carbon dioxide. At magmatic temperatures — 2,192 degrees — the density of the carbon dioxide strongly depends on pressure, which is influenced ...

Learn how a young volcano on Mars stayed active for nine million years and what its changing lava reveals about Mars’ interior.

Due to a weird quirk of geology, New Mexico's Bandera Volcano Ice Cave never warms above 31 degrees Fahrenheit, even when ...

Volcanic caves are not just an Earth thing. Scientists have spotted signs of lava tubes on the Moon and Mars. Now, ...

MANILA, Philippines — Mayon Volcano in Bicol exhibited significant activity for the past 24 hours as it remained under Alert ...

A vast underground tunnel known as a lava tube, formed from ancient volcanic activity, was recently discovered lurking beneath Venus.

But some refused to evacuate during the hazardous lava fountaining episode.

Volcanoes don’t always show their activity through huge explosions or lava rivers. In many cases, the changes are quiet and ...

Dramatic video of Kīlauea volcano in Hawaii captured the moment a USGS camera was buried in a spectacular lava fountain. The camera, located about 2,000 feet away from the volcano vent, captured the ...

HONOLULU — Hawaii’s Kilauea volcano resumed erupting Friday by shooting an arc of lava 100 feet into the air and across a section of its summit crater floor. It was Kilauea’s 31st display of molten ...

Many Hawaiʻi Island communities downwind from the eruptive vents in the southwest portion of Halemaʻumaʻu Crater inside the ...

The Philippine Institute of Volcanology and Seismology (PHIVOLCS) reported the occurrence of lava effusion and collapse from ...