The Tsar Bomba is the most powerful ... We tested it using the Nuke Map tool. The massive weapon has a huge fireball radius of 6.72 kilometers, and everything within this area is "effectively ...

If dropped on a major city, the Tsar Bomba could wipe out everything within a 35-kilometre radius, cause third-degree burns as far as 100 kilometres away, and break windows hundreds of kilometres ...