Tsar Bomba, or the King of Bombs, was the largest nuclear bomb ever detonated. It produces an explosion equivalent to 50 megatons of TNT. By comparison, the atomic bomb dropped on Hiroshima was equivalent to 13 kilotons of TNT. That means that Tsar Bomba, called "Big Ivan" in Russia, was almost 4,000 times bigger than the Hiroshima bomb. Tsar Bomba was a test explosion, detonated on 30 October 1961, in Novaya Zemlya, an Arctic archipelago. The size of the fireball was 4.6 km (2.8 mi) across, and would have destroyed everything in a 26.3 kilometer (16.3 mi) radius. Tsar Bomba left a massive crater which is observable today by satellite.