[FatMax]

http://www.fas.org/nuke/intro/nuke/emp.htm

It doesn’t looks so harmless to me.

[CougarGA7]

Depends on the frequency. It only takes about 100 Joules to stop the heart, but like I said the source of the EMP would be a bigger concern for you than the EMP itself. The EMP would have a larger effect on non-hardend electronics.

[cripplecreek]

Shouldn’t you be over on the chemtrail thread?

[oldvike]

That’s an EMP resulting from an nuclear explosion. The author is talking about EMPs from EMP weapons only. Big difference.

[McGruff]

It doesn’t looks so harmless to me.

Your first post and it's inaccurate. Welcome to FR. Where you come from?

EMP attack would wipe out hundreds of millions of Americans electrical devices

[PapaBear3625]

What happens in an EMP blast is that some significant percentage of the bomb's energy gets converted to electro-magnetic energy. Unmentioned in alarmist articles is how much energy you would need to affect the whole US.

The wiki on EMP has some more information. The "Starfish Prime" test that affected Hawaii involved a 1.4 MEGATON bomb detonated at 400 km altitude. To knock out all electronics and electrical transmission in the continental US, you would need a HUGE H-bomb (or an array of smaller ones) detonated out in space. Building multi-megaton bombs, plus being able to get them to orbital altitude is a non-trvial undertaking.