Global Volcanism Program | Image GVP-06204
A dark, broad ash-laden eruption plume towers above a line of vents only 2 km east of the Chilean research station at Pendulum Bay on December 4, 1967. Heavy ashfall from the eruption deposited 30 cm of ash on the Chilean base, collapsing the roof of the station. Members of the research party walked 6 km south to safety at another research station on the opening day of the eruption and were evacuated by helicopter the following day.
Photo by Bernardo Blass, 1967 (published in González-Ferrán, 1995).