[Lazamataz]

Nuclear explosions causing EMPs is real. But an area needs to be hit with EMP after EMP in order for it to be effective. And a single detonation won’t do the trick even at optimal altitudes.

I'd like to believe you, do you have experience or a solid source for your thoughts?

[Celerity]

“I’d like to believe you, do you have experience or a solid source for your thoughts?”

http://www.futurescience.com/emp/EMP-myths.html

This is a good, single-page resource on the event. There are many others that describe each event and each type of event in greater detail.

Literally, a software virus in our infrastructure would cause more damage than a single EMP device anywhere. THAT is what we should be afraid of.