H-bomb double flash sequence

Any atomic shot inside the Earth's atmosphere produces a double flash of light. The physics are explained in a paper of mine. I assembled this time-lapse sequence from old, archival film footage of an H-bomb shot in the Pacific. As far as I know it's the only one of its kind. Orbital detection systems that monitor for atmospheric nuclear explosions look for such double flashes. Bomb yield is determined from the interval between the two flash peaks. Original film frames released courtesy of the Atomic Energy Commission (AEC), U.S. Department of Energy (DOE).

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