A large pyroclastic flow races down Mayon Volcano, sending ash sweeping across the slopes. The fast-moving surge shows why these volcanic events are so dangerous and unpredictable. It is a tense look ...

Add Yahoo as a preferred source to see more of our stories on Google. Massive amounts of ash spewed from the Mayon volcano in the Philippines, blanketing more than 87 villages across three towns over ...

Lava effusion with collapse-fed pyroclastic density currents was observed on Mayon Volcano late Wednesday evening, the ...

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 ...