sixpenceee:Filming a pyroclastic flow in Japan, 1991. A pyroclastic flow is a fast-moving current of
sixpenceee:Filming a pyroclastic flow in Japan, 1991. A pyroclastic flow is a fast-moving current of hot gas and rock which reaches speeds moving away from a volcano of up to 700 km/h (450 mph). The gas can reach temperatures of about 1,000 °C (1,830 °F).Now this is the real horrors of our world. Imagine being caught in that! -- source link