Global Volcanism Program | Image GVP-03992
Steam-and-ash clouds generated by collapse of the toe of a lava flow, incandescent in its upper portion, are seen on the SW flank of Pacaya volcano in November 1988. Frequent strombolian eruptions began at MacKenney cone in 1965 and were often accompanied by lava flows from summit or flank vents. Much of MacKenney cone, particularly the northern side, is armored by these basaltic lava flows, which have traveled up to 6 km down the southern flank.
Photo by Lee Siebert, 1988 (Smithsonian Institution).