Tsar Bomba C), north of the Arctic Circle over the Novaya Zemlya archipelago in the Arctic Ocean. The bomb was dropped from an altitude of ; it was designed to detonate at a height of over the land surface ( above sea level) by barometric sensors. The original, November 1961, United States Atomic Energy Commission estimate of the yield was 55–60 megatons, but since 1992, all Russian sources have stated its yield as 58.6 megatons. First secretary Khrushchev warned in a filmed speech to the Supreme Soviet of the existence of a 100-megaton bomb (technically the design was capable of this yield.)
Belushya Guba area of restricted access (formally, as part of border security zone), and a special permit is needed to visit the archipelago. About northeast of Belushya Guba is the settlement of Rogachevo, the second largest in the archipelago, along with the Rogachevo airbase. Upon visiting Novaya Zemlya in 1894, Arkhangelsk Governor decided to create a new encampment. In 1896, an expedition conducted a survey of the west coast of Novaya Zemlya. The following year Belushya Guba was founded. During World War II, Belushya Guba was a focus of both German and Soviet attention. German U-boats used Belushya Bay as a resting