Global Volcanism Program | Image GVP-00949
A pyroclastic flow travels down the SE flank of Mayon volcano in the Philippines on 24 September 1984. An ash plume rises above the moving pyroclastic flow, which was the largest of a series of pyroclastic flows that occurred during an eruption that began on 9 September. The pyroclastic flow traveled 7 km from the summit vent; velocities of 50 m/s were estimated from photographs.
Photo by Ernesto Corpuz, 1984 (Philippine Institute of Volcanology and Seismology).