American geologists are raising urgent concerns after new analysis of Yellowstone supervolcano's subsurface magma chamber ...

Scientists are tracking changes at the giant supervolcano that lies under Yellowstone National Park, but they say there's no need to worry at the moment. “The western part of the Yellowstone caldera ...

Social media videos are stoking fears about a catastrophic eruption in central Oregon, but the science tells a different story.

A scalding-hot pool of mineral water is shown at the Long Valley Caldera in 2019 near Mammoth Lakes. (George Rose / Getty Images) One of California's riskiest volcanoes has for decades been undergoing ...

Campi Flegrei is speeding toward a transition, which will either cause an eruption or a change to its underground magma chamber.

Caldera formation arises when large volumes of magma are evacuated from a sub-surface reservoir, leading to gravitational collapse of the overlying rock into the evacuated space. The process begins ...