It was detonated on October 30, 1961, at Sukhoy Nos, a remote Arctic island in the Soviet Union.
The Tsar Bomba had a yield of 50 megatons of TNT, which is equivalent to 50 million tons of TNT. This makes it the most powerful nuclear weapon ever tested.
The explosion from the Tsar Bomba was so powerful that it caused a mushroom cloud that reached a height of 64 kilometers (40 miles) and had a diameter of 40 kilometers (25 miles). The shockwave from the explosion circled the globe three times and caused damage as far away as 1,000 kilometers (620 miles).
The Tsar Bomba was a demonstration of Soviet power and technological prowess, but it was also a warning to the United States and its allies. The Soviet Union hoped that the test would deter the United States from starting a nuclear war.