How do you create an electromagnetic pulse EMP?

Answer:
Detonate a high yield nuclear device in the upper atmosphere or just outside of the Earth's atmosphere.

EMP was discovered at the US Nuclear Tests at Bikini Atoll when it knocked out power for a short time as far away as Hawaii.
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Contributor: Jason
First answer by Aggie80. Last edit by Jason Verrastro. Contributor trust: 0 [recommend contributor recommended]. Question popularity: 35 [recommend question].