Some of you may know about the devastating Atomic bombs dropped on Nagasaki and Hiroshima in 1945 during WWII. If you thought those were big, well then... think again.
That is a graph comparing the radius of the fireball of different bombs detonated. The little pink circle is the bomb dropped on Nagasaki. The other graph is showing the comparison of the mushroom sizes. The Tsar Bomb is so big compared to Hiroshima that Hiroshima has to be magnified. Tsar Bomb's mushroom cloud reached an astonishing 64 kilometres high. It was originally designed to be 100 megatons of TNT, but was reduced to 50 megatons ( 50 million tons ) because the fallout would have been to devastating. Some sources say the yield was estimated at 57 megatons, but all Russian sources since 1991 state that the yield was only 50 MT. The Tsar Bomb was so powerful it sent shock waves around the world three times. It was dropped from a modified TU-95v plane on the 30th of October, 1961. This link is a youtube video of the actual detonation at Mityushikha Bay. The purpose of the test was to intimidate the Americans (it was tested during the Cold War) and to prove that if the Russians missed the target, they could still obliterate it.