Mount Pinatubo, on the Philippine island of Luzon, explodes June 15, 1991, sending more than a cubic mile of volcanic material some 22 miles into the air, while pyroclastic flows bury nearby ...

A famous natural disaster Mount Vesuvius erupted in the year 79. It buried the cities of Pompeii and Herculaneum under a rapidly moving flow of rock and ash called a pyroclastic flow. Many bodies ...

This is Mount Pinatubo, an active stratovolcano ... to-air missile installations that have since been buried by pyroclastic flows and subsequent lahar. The off-road drive along the O'Donnell ...