A pyroclastic flow – a powerful avalanche of hot rock, ash, and gas – was witnessed on Mount Etna surveillance cameras at around 11:30am local time on Monday, according to Italy’s National ...

Pressures within pyroclastic flows may be as much as three times as great as observations had suggested.

A volcanic eruption in Italy left people scurrying for cover from what officials are saying is a pyroclastic flow. Several videos circulating online show people running as smoke from the side of ...

In A.D. 79, a man who died in Mount Vesuvius' eruption near Pompeii had a rare transformation: His brain seemingly turned ...

A volcanic eruption in Italy left people scurrying for cover from what officials are saying is a pyroclastic flow. Several videos circulating online show people running as smoke from the side of ...

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.

Italy’s Mount Etna volcano violently erupted on Monday, sending plumes of toxic ash and smoke billowing into the sky as people on the mountain ran for safety to escape the danger.