Nuclear test

Starfish Prime (United States)

9 Jul 1962 · Johnston Is

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What the records say

When
9 Jul 1962
Kind
Nuclear test
Yield (kt)
1,400
Where
Johnston Is
Coordinates
16.45° N, 169.32° W
Yield kt
1400
Type
rocket
Purpose
British test, effects of nuclear weapons
Reported by
DOE

Starfish Prime

1962 high-altitude nuclear test by the U.S. over the Pacific Ocean

Starfish Prime was a high-altitude nuclear test conducted by the United States, a joint effort of the United States Atomic Energy Commission (AEC) and the Defense Atomic Support Agency. It was launched from Johnston Atoll on July 9, 1962, and was the largest nuclear test conducted in outer space, and one of five conducted by the US in space.

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