Volcanic 'avalanches' glide on air, boosting their deadly speed Pyroclastic flows are a leading cause of eruption-related deaths. Now, lab tests reveal the mind-bending reason they may rush down a ...

Pyroclastic density current (PDC): A turbulent, high-density flow composed of volcanic ash, lapilli and gases that descends rapidly along a volcano’s slope following an eruption.

To observe the movement of pyroclastic flow safely, the researchers recreated the currents inside a laboratory using materials from an actual volcanic eruption in New Zeland 2,000 years ago.

But a pyroclastic flow can transport thousands to millions of tons of volcanic material to regions dozens of miles from its source, bypassing barriers and surging up hilly terrain.

YAMAGUCHI—An eruption of Mount Aso in Kumamoto Prefecture 90,000 years ago created a pyroclastic flow that traveled 170 kilometers north to the Sabagawa river here, the longest such distance ...

MANILA, Philippines — The state seismologists bureau reported "frequent incandescent rockfall and numerous pyroclastic density current (PDC) events" in the Mayon volcano’s ...

JAKARTA: Mount Merapi, an active volcano in Central Java and Yogyakarta, has recently emitted lava and pyroclastic flows that reached distances of up to 1.5km from its summit.

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

Pyroclastic flows represent an important style of explosive volcanism, particularly of the high viscosity, volatile-rich magmas like rhyolite. Pyroclastic flow deposits, and particularly ignimbrites ...

Santa Maria (which is known also as Santiaguito) in Guatemala put on quite a show, with impressive explosive eruptions that produced numerous pyroclastic flows (also known as pyroclastic density ...

A pyroclastic flow extending some 900 meters was observed on the southwestern side of 626-meter-high Mount Shindake on Kuchinoerabu Island in Kagoshima Prefecture.