OK, I did find this from Wikipedia:
"A pyroclastic flow (also known scientifically as a pyroclastic density current[1]) 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)"
Good grief! Can you say "flash broiled".
"A pyroclastic flow (also known scientifically as a pyroclastic density current[1]) 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)"
Good grief! Can you say "flash broiled".
