An eruption plume rises above Telefon Bay on the north side of the caldera bay on December 4, 1967. The eruption originated from four aligned vents and formed a new island, named Yelcho. During the peak of activity, the eruption plume rose 10 km above the vent. Ashfall occurred across Port Foster caldera bay and throughout the Shetland Islands. A subaerial vent NW of Pendulum Cove 2.5 km to the east was also active. The eruption ended on December 7.

Photo by British Antarctic Survey, 1967 (published in González-Ferrán, 1995).

Deception Island