Pyroclastic Flow 1
Pyroclastic Flow 1 : Natural Disaster. A pyroclastic flow is a hot (100-600OC), fast-moving (>100 km/hr) mixture of ash, rock fragments and gas. Such flows form when an eruption column or a lava dome collapses. They usually travel down valleys and cause total devastation of the area over which they flow. People in the path of a hot pyroclastic flow can be killed by asphyxiation, heat and noxious gases. Pyroclastic flows have been the main cause of destruction and loss of life in Montserrat since 1995