The Dead Lake

Between 1949 and 1989 at the Semipalatinsk Nuclear Test Site (SNTS) a total of 468 nuclear explosions were carried out, comprising 125 atmospheric and 343 underground blasts. The aggregate yield of the nuclear devices tested in the atmosphere and underground at the SNTS (in a populated region) exceeded by a factor of 2,500 the power of the bomb dropped on Hiroshima by the Americans in 1945.