posted on Oct, 14 2009 @ 05:02 PM
You'd have to detonate a large weapon high in the atmosphere to have an EMP so great that it would knock out the whole of continental USA in one fell
swoop. But, from my limited understanding, the same effect could be produced by only one small nuclear weapon. Because the problem is that if one
small part of the electricity grid collapses it then has a cascade effect on the rest of the grid.
Some overgrown trees, touching sagging electricity wires during a heatwave in 2003, led to over 55 million people in North East USA and Canada losing
their electricity supply. Strangely, the loss of electricity supply affected the electricity generating companies the worst of all, power stations
went offline, computers failed ... and that just made the problem even worse, with the power failures cascading over a vast area.
Those structural problems still exist in the electricity industry, it's as vulnerable to cascading trips as it was 6 years ago, mainly due to a lack
of investment. Heaven alone knows what an EMP event would produce, wouldn't be enjoyable that's for sure.