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Sorry, I don't know what else a strong electromagnetic pulse could be?
It could be used to magnetise a piece of ferrous or wipe magnetic tapes or be used for crack detection in metals and so on and so on.
You should not jump to conclusions when a post appears, because you dont understand its purpose, I find its best to ask the OP.
It can be used for transport power......
and nigel this thing was used way before... the first time i saw emp was in a game of the series called command and conquer