The island is a basaltic andesite stratovolcano, and the latest crater, about 500 feet (150 metres) across and 200 feet (60 metres) deep, formed explosively some time between 1968 and 1984.
Bellingshausen Island is one of the most southerly of the South Sandwich Islands, close to Thule Island and Cook Island, and forming part of the Southern Thule group. It is named after its discoverer, Baltic German-Russian Antarctic explorer Fabian von Bellingshausen (1778–1852).
The island is a basaltic andesite stratovolcano, and the latest crater, about 500 feet (150 metres) across and 200 feet (60 metres) deep, formed explosively some time between 1968 and 1984.