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Most powerful space-based nuclear explosion

According to Official Guinness Records,

A 1.45 megaton nuclear explosion occurred in space 399 km. (248 miles) above Johnston Island in the Pacific Ocean on July 9, 1962. The 755 kg. (1665 pound) warhead was launched by the US Air Force using a Thor Missile. Codenamed Starfish Prime, the explosion was more than 100 times more powerful than the Hiroshima blast and formed its own artificial aurora. The height of the detonation is equivalent to the orbital altitude of the present-day Space Shuttle.

For a complete list of 1962 records, please visit 1962 Guinness Records in United States Minor Outlying Islands.

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Content last updated on 2018-11-27