The UK's first nuclear test, Operation Hurricane, was in the Montebello Islands of Western Australia. It was followed by the first nuclear tests on the Australian mainland, which were conducted at Emu Field in the Great Victoria Desert in South Australia as part of Operation Totem on 14 and 26 October 1953. Two further tests were held on the Montebello Islands as part of Operation Mosaic on 6 May and 19 June 1956. In the 1980s there emerged a claim that the second Mosaic test was of a significantly higher explosive yield than suggested by available figures— as compared to the official figure of —but this claim does not stand up to scrutiny.