This 7x-speed footage captures a massive pyroclastic flow racing down Indonesia’s Mount Semeru as the volcano unleashed a powerful eruption. | AccuWeather

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

A breathtaking yet terrifying moment as Chile’s Calbuco Volcano unleashes a massive pyroclastic flow stretching over 7 km at sunset. The sky burns with fiery hues while ash clouds tower into the heavens, capturing the raw, unstoppable force of nature. A scene that reminds us how small we truly are before the power of the Earth. #Ethiopia #volcanoeruption #EpicEruption | Space Xplore

NEWBORN LAVA DOME SPOTTED AT MAYON VOLCANO AS PYROCLASTIC FLOW OCCURS A newborn dark lava dome was observed at the summit of Mayon Volcano as it released a pyroclastic density current (PDC), or “uson,” at around 11:40 AM on Jan. 8. A total of 49 PDCs have been recorded at the volcano since this morning. Alert Level 3 remains in effect over Mayon, and entry into the 6-kilometer Permanent Danger Zone is strictly prohibited. 📷: PHIVOLCS | GMA Public Affairs