It's measurable against natural background radiation: https://en.wikipedia.org/wiki/Background_radiation#/media/File:Radiocarbon_bomb_spike.svg https://en.wikip

It's measurable against natural background radiation: https://en.wikipedia.org/wiki/Background_radiation#/media/File:Radiocarbon_bomb_spike.svg https://en.wikipedia.org/wiki/Background_radiation#/media/Fi... I presume a different background radiation level has some impact?