A large pyroclastic flow races down Mayon Volcano, sending ash sweeping across the slopes. The fast-moving surge shows why ...

Mayon volcano unleashed its most powerful pyroclastic flow of the current eruption in late May 2026, sending a 4-kilometer torrent of superheated gas and rock fragments racing down its southeastern ...

This story originally appeared in the Morning Brief email newsletter. Sign up here to get more stories like this and weekday weather updates from The Weather Channel and our meteorologists. The video ...

Pyroclastic density currents – fast flows of hot gases, ash, and debris – are some of the most hazardous phenomena associated with explosive volcanic eruptions. Analyses of historical pyroclastic ...

Semeru volcano — the tallest volcano on Java at 3,676 meters — erupted on the afternoon of November 19, 2025, with pyroclastic flows racing at high speed more than 8.5 kilometers down its slopes, as ...

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 ...