The Soviet Union detonated its first atomic bomb ... The test’s explosion yielded the equivalent of 400 kilotons of TNT, making it 30 times larger than the atomic bomb dropped on Hiroshima.
Instruments throughout Western Europe recorded the latest Soviet nuclear blast that may have approached a power equal to that of 100 million tons of TNT. The blast was recorded at 9:33.3 a.m. (3: ...