Bouvet Island of establishing a manned meteorological radio station, but a suitable location could not be found. By then both the flagpole and hut from the previous year had been washed away. The Third "Norvegia" Expedition, led by Hjalmar Riiser-Larsen, arrived the following year and built a new hut at Kapp Circoncision and on Larsøya. The expedition carried out aerial photography of the island and was the first Antarctic expedition to use aircraft. The "Dependency Act", passed by the Parliament of Norway on 27 February 1930, established Bouvet Island as a dependency, along with Peter I Island and Queen Maud Land. The
Bouvet Island pack ice. The Bouvet Triple Junction is located west of Bouvet Island. It is a triple junction between the South American Plate, the African Plate and the Antarctic Plate, and of the Mid-Atlantic Ridge, the Southwest Indian Ridge and the American–Antarctic Ridge. The island is located south of the Antarctic Convergence, giving it a marine Antarctic climate dominated by heavy clouds and fog. It experiences a mean temperature of , with January average of and September average of . The monthly high mean temperatures fluctuate little through the year. The peak temperature of was recorded in March 1980, caused by