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It was ten times more powerful than all of the ammunition used in WW2 combined - including the Nagasaki and Hiroshima bombs, and blew out windows over 500 miles away.
It was detonated at 11:32 on October 30, 1961 over the Mityushikha Bay nuclear testing range north of the Arctic Circle on Novaya Zemlya Island in the Arctic Sea.

The mushroom cloud rose to an altitude of 64,000 meters (210,000 feet), or approximately 40 miles before levelling out.

The thermal energy from the blast was so powerful that it could cause 3rd degree burns to a human standing 100 km (62 miles) away from the blast.

The radius of the fireball was 2.3 kilometres (1.4 miles). The blast radius (area in which total destruction ensured) was 13km (8 miles).

The device was trillions of times more powerful per unit volume in comparison to the material in the sun's fusion core (about 25% of the sun's radius) and it would take about 10 million years for an equivalent volume of the sun's core to produce the same amount of energy as came from within the bomb's casing.

The blast yield was equal to that of a blast of 57,000,000 Tonnes of TNT....or to put that into context: The weight of 270 Empire State Buildings worth of TNT.

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