chernobyl907 s-o-u-t-h-o-f-h-e-a-v-e-n-69 Ivy Mike, which took place on 1 November 1952, was the first full-scale test of a hydrogen bomb. Equivalent to more than 10m tons of TNT!!! Source: s-o-u-t-h-o-f-h-e-a-v-e-n-69 ivy mikenuclear testingoperation ivyatomic blastmushroom cloud