Watch the warning sirens sound as a dangerous pyroclastic flow races down Indonesia's Mount Semeru. The dramatic footage captures one of the volcano's most hazardous eruptions, with scorching clouds ...

A zoomed-in view shows the front of a pyroclastic flow rushing down Semeru Volcano after an eruption sends hot ash and debris collapsing onto the slopes. The most intense moment comes as the flow ...

A pyroclastic flow (also known as a pyroclastic density current or a pyroclastic cloud) is a fast-moving current of hot gas and volcanic matter (collectively known as tephra) that flows along the ...

Pyroclastic surges are lethal hazards from volcanoes that exhibit enormous destructiveness through large dynamic pressures of 100–102 kilopascal inside flows that are capable of obliterating ...

Pyroclastic flows are some of the most fearsome hazards posed by erupting volcanoes. These avalanches of superheated ash, gas, and rock are responsible for some of the most famous volcanic disasters ...

The discovery of the driving force behind the world's deadliest volcanic events could help improve forecasting of their devastating effects, new research suggests. The findings reveal the mechanism ...

Fuego volcano erupts in Alotenango, some 65 kilometers southwest of Guatemala City, on August 4, 2026. Johan ORDONEZ/AFP via Getty Images Guatemala's Volcán de Fuego has erupted into its most ...