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It would take quite a big nuclear explosion to cause big enough EMP pulse to disable electronic devices planet wide... You can't make that big EMP pulse with just electronic components, because it would require so big components that turning the device on locally would be suicide mission. And where would you put such big device to also have electricity to power it.

Perhaps. Maybe a large enough nuclear explosion in space would do the trick... or several simultaneously.

I think multiple synchronous explosions spread across the continents would work the best... Single large explosion in space would only cause about 50-75% of the planet to go dark because the single pulse does travel in straight line and not reach the opposite side of the planet. The exact area it affects depends on wave length of the pulse but that is math beyond my skills...

Haha yes, same here.

That is a good point though. Not sure who would benefit from something like that though. Perhaps a terrorist group that got their hands on the technology with the only goal of sending humanity back to the stone age.

Anything for science... In some countries the electric grid is controlled by corrupt multinational companies... Killing their grid would make the country better place.

There is probably a lot of truth to that...

There has been a lot of talk about company called Caruna that bought big chunk of electric grid in Finland... It's mostly owned by Australian and Dutch companies, but also two by Finnish pension funds. They bought the grid from Fortum, electric company with close ties to Finnish government and pushed prices of electricity up over 100% few months after the purchase.

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