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 ...

A section of lava collapses on Mayon Volcano, sending hot ash, gas, and volcanic material rushing down the slope as a ...

TEMPO.CO, Jakarta - The head of Indonesia’s Geological Agency, Muhammad Wafid, has warned that deposits from Mount Semeru’s recent pyroclastic flows could trigger secondary disasters if not properly ...

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

Add Yahoo as a preferred source to see more of our stories on Google. A lava collapse at Mayon Volcano in the Philippines triggered a fast-moving pyroclastic flow on May 13, sending a volcanic plume ...

A man presses his hands together in prayer before a memorial cenotaph in the location that served as the media's "fixed point" when a pyroclastic flow hit the area, in Shimabara, Nagasaki Prefecture, ...