Pyroclastic flows from Unzen were generated by gravitational collapse of the growing lava dome, near the city of Shimabara, Nagasaki (1991). Most of the flows traveled from 1 to 3 km, but some flows reached more than 4 km, burning houses and killing people in the evacuated zone of Kita-kamikoba on the eastern foot of the volcano.The velocities of the flows ranged from 15 to 25 m/s on the gentle middle flank. Scientific paper: http://link.springer.com/article/10.1007/BF00301514#page-1 Other detai

When a volcano erupts, pyroclastic flows are often the biggest danger to anyone nearby. These fast-flowing currents of rock, ash and hot gas are extremely difficult to study, so researchers created their own. 🌋 [Read the related Nature Geoscience paper here: https://go.nature.com/2Im1bYs] #GeologiaMag #Pyroclasticflow #Volcano #Eruption | Geologia Mag

When a volcano erupts, pyroclastic flows are often the biggest danger to anyone nearby. These fast-flowing currents of rock, ash and hot gas are extremely difficult to study, so researchers created their own. Read the related Nature Geoscience paper here: https://go.nature.com/2Im1bYs | Nature Portfolio

Insane Pyroclastic flow from the Large Volcanic eruption in Guatemala. Pyroclastic flows can reach speeds of 450mph, and incenerate what they pass over, with temperatures of 1,200 - 1,400 degrees! This looks like something out of a movie right now. We sometimes overlook volcanoes and how powerful they can be. Let's not forget the men and women of Guatemala during this time. Prayers for all. _____________ Video credit: twitter/emanueloficial "Emmanuel") | Collin Myers

Pyroclastic flows (referred to more often today, as pyroclastic density currents) are rapidly moving avalanches of hot rock, dust and gas that flow down the sides of a volcano. What makes them especially devastating is that they are extremely hot and can travel for several miles from a volcano. They can form during an eruption when hot pulverized rock and gas that first rapidly rises into the sky falls back, forming pyroclastic flows that race down the sides of the volcano. Other times, pyroclas