A large pyroclastic flow races down Mayon Volcano, sending ash sweeping across the slopes. The fast-moving surge shows why ...
A pyroclastic flow (also known as a pyroclastic density current or a pyroclastic cloud) is a fast-moving current of hot gas and volcanic matter (collectively known as tephra) that flows along the ...
Roughly 3,000 residents have left their homes near Mayon Volcano in the Philippines after pyroclastic flows began sliding ...