Tsar Bomba (Russian: Царь-бомба, literally “Emperor-bomb”) is the Western name for the largest, most powerful nuclear explosive ever detonated. Developed by the Soviet Union, the ~100 megaton bomb (later caped at 50 megatons) was codenamed Ivan (Russian: Иван) by its developers.
The bomb was tested on October 30, 1961 in Novaya Zemlya, an island in the Arctic Sea. The device was scaled down from its original design of 100 megatons to minimize nuclear fallout.
Michael Castellon 