Watch the warning sirens sound as a dangerous pyroclastic flow races down Indonesia's Mount Semeru. The dramatic footage ...

Fuego volcano eruption 2026: Guatemala's most dangerous stratovolcano has entered a full paroxysmal phase, sending ...

In the dead of night, the crater spews glowing red flames. A massive volume of volcanic ash also surges into the sky.

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 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 ...

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 ...

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 ...

Activity at the volcano in the Philippines sent lava and pyroclastic flows down the volcano’s flanks and prompted evacuations in nearby communities. nasa.gov That SO₂ figure — reached on July 11 — ...