On 1 November 1952 at 0714:59.4, MIKE was detonated on the surface of Eluklab Island in the Pacific Proving Ground at Enewetak Atoll. This was the first thermonuclear explosion ever, and yielded 10.4 megatons. Eluklab was evaporated, leaving a crater 200 feet deep and 1 mile in diameter. More @Wikipedia
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