Global Volcanism Program | Image GVP-03871
A pyroclastic flow produced by collapse of a growing lava dome descends the northern flank of the Santiaguito lava dome in November 1967. Periodic larger collapses of Santiaguito have sent pyroclastic flows down the populated southern flanks. The most catastrophic of these traveled 10 km in 1929, when hundreds to thousands of people were killed.
Photo by Dick Stoiber, 1967 (Dartmouth College).
This image is made available under the Creative Commons BY-NC 4.0 license terms.