How Fast Do Gases From Volcanic Eruptions Travel?

How Fast Do Gases From Volcanic Eruptions Travel? One of the leading killers during explosive volcanic eruptions is a family of superheated gas, ash, and debris known as pyroclastic density currents. These tumbling, turbulent paroxysms rush downslope at temperatures as high as 1,300°F and at speeds often exceeding 50 miles an hour. How far do