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

Time-lapse footage shows the Philippines' most active volcano erupting on Monday http://cnn.it/2EK9ic5 | CNN

Dramatic video shows bolts of lightning as a volcano spews ash up to nine miles into the air in the Philippines. The country has raised the alert level, meaning an "explosive eruption" could happen in the coming hours or days: cnn.it/35OKfBK | CNN

PYROCLASTIC FLOW A pyroclastic flow is a fast-moving current of extremely hot gas, volcanic ash, and rock fragments that rushes down the slopes of a volcano during explosive eruptions. These flows can reach speeds of over 320 km/h and temperatures exceeding 1,000 °C, making them one of the most dangerous volcanic hazards. Unlike lava flows, pyroclastic flows can travel great distances, destroy everything in their path, and cause widespread devastation due to their speed, heat, and suffocating as

Pyroclastic flow observed at Semeru Volcano This sped-up (x7) footage shows a pyroclastic flow descending the slopes of Semeru. These flows consist of hot ash, gas, and fragmented rock moving rapidly under gravity. Semeru remains one of Indonesia’s most active volcanoes and is continuously monitored. Credit: CCTV Semeru #Semeru #Geology #GeologyPage #Volcanology #EarthScience #Indonesia | Geology Page