Global Volcanism Program | Image GVP-03984
A large hornito, or lava vent (center), grew on the NE flank of MacKenney cone (background peak) during a long-term eruption that began in 1965. This small NE-flank vent was active from August 5, 1984, until February 6, 1985, and produced a 50-m-high lava cone that fed sinuous lobes of lava down its flanks. Later eruptions buried most of the hornito before it was destroyed by an explosion in 1995. This photo was taken by Alfredo MacKenney, the Guatemala City physician and volcano enthusiast for whom the cone was named.
Photo by Alfredo MacKenney, 1985.