Global Volcanism Program | Image GVP-08409
Dark-colored lava flows erupted in late 1998 blanket the upper left-hand flank of smoking MacKenney cone in February 1999. The flows originated from vents at the summit and upper flanks of the cone and descended into the caldera moat of Pacaya before being deflected by the caldera wall to the west. The hill on the left horizon is Cerro Chino, a cinder cone constructed on the NW rim of the caldera. Strong explosive eruptions in 1998 created a notch in the summit of MacKenney cone and the deep gully that extends diagonally down to the right.
Photo by Lee Siebert, 1999 (Smithsonian Institution).