“A link that appears to be a good read about EMP myths and how the Inverse-Square law applies or doesnt. EMP Myths
by Jerry Emanuelson, B.S.E.E.
http://www.futurescience.com/emp/EMP-myths.html"
This link you posted corresponds to the information I got from a man who worked all his life with our defense department on the effects of an EMP and HEMP in order to harden our military defense systems, which they did. Everyone should read at that link to understand the truth of what will happen in both instances.