Acid rainfall in 1979 burned some of the inhabitants. Local water supplies were contaminated and had a pH of 5.2-5.5. View of the ash plain from a ridge on Benbow. The caldera rim is in the distance on the right. Photograph courtesy of Mike Lyvers.
Normal faults offset blocks of the tuff cone and shield volcano.
View inside Benbow's crater. The crater contains a lava lake. Photograph courtesy of Mike Lyvers. Crater 3 at Marum, another of Ambrym's main vents. Photograph courtesy of Mike Lyvers.