Hazards and Processes
Research and Impacts
Volcano Types and Features

There are 5,971 volcano images available on the GVP website, including 4,243 in these new galleries with updated captions and keywords, and at a larger size.

Pyroclastic flows (also called pyroclastic density currents) are hot ground-hugging mixtures of volcanic rock, volcanic ash (pulverized rock, glass, and crystals), and gas that can race away from vents at great speeds. They can form from column collapse (the partial collapse of an ash plume), dome collapse (called block-and-ash flows), the collapse of lava flow fronts, ‘boiling over’ from the vent, or phreatomagmatic eruptions. They range in concentrations of gas and solid material, which can alter their behavior and the areas impacted.

VOLFILM Video

Image Gallery for Pyroclastic Flows

Associated Gallery Keywords