Mixtures of hot volcanic rock and gas called pyroclastic flows travel so far by gliding on air, a new study suggests.

Pyroclastic flows are a leading cause of eruption-related deaths. Now, lab tests reveal the mind-bending reason they may rush down a volcano’s flanks.

Scientists think they’ve figured out how pyroclastic flows, fast-moving bringers of death during volcanic events, can travel such incredible distances and speeds despite the friction between the ...

A new study sheds light on what happens when a supervolcano erupts, providing insight on how rivers of hot ash and gas called pyroclastic flows manage to travel huge distances of over 100 miles ...

Pyroclastic flows contain a deadly combination of hot rock fragments and gas. Temperatures regularly top 1,000 degrees Fahrenheit, and these torrents can careen down mountainsides at hundreds of ...

A pyroclastic flow from Mayon in the Philippines, seen on September 23, 1984. I've labeled the main parts of a pyroclastic, with the leading surge, main body and accompanying ash cloud.

Scientists figured out why pyroclastic flow cheat friction and move rapidly. The findings could help scientists and the authorities to predict the movement of the heated volcanic materials and ...

Results showed that the pyroclastic flows "generate their own air lubrication," the team wrote. It found that an area of high-pressure volcanic material forms toward the base of the flow.

Guatemala's Volcan de Fuego -- Volcano of Fire -- erupted spectacularly Sunday, shooting a plume of ash and gas nearly 6 miles into the sky and spreading ash and debris across towns and farms more ...

Volcanologist Professor Chris Jackson discovers evidence of the deadly pyroclastic flow.

Study suggests that pyroclastic flows traveled in dense, slow-moving currents during one ancient supereruption.

This river, or pyroclastic flow, may not be glowing orange like molten earth, but it is undeniably the most deadly part of the volcano.