A pyroclastic flow (also known scientifically as a pyroclastic density current) is a fast-moving current of hot gas and rock (collectively known as tephra), 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). Pyroclastic flows normally hug the ground and travel downhill, or spread laterally under gravity.
| Attributes | Values |
|---|---|
| rdfs:comment |
|
| foaf:depiction | |
| thumbnail | |
| is death cause of | |
| is type of |