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WKetel
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re: How to cripple a country: Electromagnetic pulse attacks
WKetel   10/27/2012 10:21:10 PM
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So just exactly what is the suggested defense mechanism? And, for that matter, just what is the anticipated failure mechanism? It is already given that we have defense against lightning strikes, which happen all of the time. So how about some description of the exact actions of this menace. OR, is it some "Phantom Menace" that we must defend against, similar to that Y2K event that took out all of our computerized every-things. OR perhaps it didn't perform quite as advertised.

jaybus0
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re: How to cripple a country: Electromagnetic pulse attacks
jaybus0   10/20/2012 1:41:00 PM
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Indeed. In August 1859 a large CME caused a very bright aurora that "turned night into day" in Panama. Telegraph communications were impossible accross America and Europe for nearly two days. Sooner or later, we WILL again take a direct hit from a large CME. It wasn't a great diruption in 1859, when telegraph machines used hand operated mechanical switches, but it will be a huge disruption now.

SouthernKiwi
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re: How to cripple a country: Electromagnetic pulse attacks
SouthernKiwi   10/20/2012 12:53:25 AM
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Of particular concern for the grid is the large transformers on it. Lead times for these right now are in the region of months - and we are not facing the grid being down at the manufacturing plants concerned. Imagine an event happening early January taking out 20 of these across the USA or Europe. I have a 5kW generator for the house that runs of the gas utility - who knows if that would still be able to be supplied though?

DigitalRacer
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re: How to cripple a country: Electromagnetic pulse attacks
DigitalRacer   10/19/2012 11:59:06 PM
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The book "One Second After" will shock you like an EMP. Highly recommend it. http://www.amazon.com/One-Second-After-William-Forstchen/dp/0765317583

ccalvin
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re: How to cripple a country: Electromagnetic pulse attacks
ccalvin   10/19/2012 11:49:22 PM
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Be sure to read Frederick Brown's "The Waveries". "'Be Prepared' is the Boy Scout's Marching Song".

Bob.Gilbertson
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re: How to cripple a country: Electromagnetic pulse attacks
Bob.Gilbertson   10/19/2012 6:43:08 PM
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Unfortunately, a vulnerabilty is often ignored until an event happens. There is no economic incentive to design products for this even though IEC test standards exist http://www.emcs.org/acstrial/newsletters/winter08/hpem.html and test equipment is available http://www.apelc.com/system4.html. The EMP Commission Chairman has a good summary at http://images.military.com/DT/images/Graham.pdf

przemek0
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re: How to cripple a country: Electromagnetic pulse attacks
przemek0   10/19/2012 3:14:45 PM
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The EMP electric field is often specified as 30kV/m for times measured in seconds. This means that a typical USB port will see 300 Volts applied between GND and Vcc, because they are about 10mm apart. Will it survive this potential?

przemek0
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re: How to cripple a country: Electromagnetic pulse attacks
przemek0   10/19/2012 2:20:00 PM
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That sounds ominous: are you saying that with weapons you can take it from the people who did prepare and stock up? Don't be shy, say what you mean.

Etmax
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re: How to cripple a country: Electromagnetic pulse attacks
Etmax   10/19/2012 12:19:11 AM
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In the end, the mere fact that a solar event can do the same and is so much more likely suggests something should be done about it.

Etmax
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re: How to cripple a country: Electromagnetic pulse attacks
Etmax   10/19/2012 12:13:55 AM
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Remember that if you were say a terrorist on US soil that smuggled in a missile with a nuclear warhead, you would only need to launch it vertically to the correct height which would take a few minutes. In that time frame there could be no response from the military.

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