![]() ![]() ![]() But to survive the next few seconds, there’s a few things you’ll need to do. The fact you’ve lived this long means you’re on the periphery, not at ground zero. You’ve now survived the first seconds of a nuclear detonation, hopefully a “tactical” bomb smaller than that at Hiroshima (which was the equivalent of 15 kilotons of TNT). You find cover to shield the worst of the heat and radiation. You’ve also received substantial doses of invisible nuclear radiation: gamma rays, X-rays and neutrons. Wearing pale-coloured clothing or being indoors will help. The intense thermal radiation also causes skin burns, possibly through your clothing. It gets incredibly hot and bright, and you shield your eyes to avoid retina burns. The brightness suddenly vanishes, but returns again a short while later and continues – the distinctive double flash caused by competition between the fireball and shock wave. ![]()
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