I did a quick search and found surprisingly little on here about the topic. Then I got to thinking about it and remember reading a really good article about the subject. I just coundn't find it again. Did some searching and eventually I found it. Articles: Let's Worry about a Real Threat From the article: (rearranged copy and paste style for clarity) ""The EMP created by a nuclear bomb consists of three separate pulses, called E1, E2, and E3." "The E1 pulse is an extremely abrupt electromagnetic shock, which makes its way into unprotected computers and electronic controls, destroying the delicate transistors." "The E2 pulse is similar to lightning bolts" "The E3 pulse creates movement of the Earth’s magnetic field. This shifting of the magnetic field induces huge currents in long electric transmission lines. The result can be the destruction of large transformers, an essential part of the electric grid." "A natural EMP, generated by solar activity, [also] generates the E3 pulse" The magnitude of these types of EMP are as follows: E3: you are talking less than a volt to a few volts per kilometer of conductor, naturally occurring EMP can last days, nuclear E3 can last hours to most of a day. E2: a few volts to maybe up to a few hundred volts per meter. Lasts seconds at most. E1: thousands, tens of thousands, hundreds of thousands, maybe even a million volts per meter, depending on distance from ground zero for a tiny fraction of a second. From what I have seen over the years lightning hitting in very close proximity to a vehicle does not effect them, aside from the radio where it causes lots of static for several seconds, quickly returning the radio back to normal operation. It can also over load and shut down most electronics, but they can be powered back up seemingly with no ill effect. Electronics powered down during an E2 hit don't seem to be effected at all. For E3, or the solar storm the worst case scenario is: Solar storm of 1859 - Wikipedia, the free encyclopedia Anything not connected to the power grid should not be effected by E3. NASA says there is something like a 14% chance of this happening ever 11 years. (couldn't find the article for this one) Also I have seen talk of putting electronics in metal containers and there seems to be a lot of misunderstanding as to how this works. Well problem is metal containers are conductive, if there is no earth ground on the container then the EMP will pass straight through the metal walls only losing energy reflected by the metal, which wont be enough to protect anything from E1. If there isn't an earth ground then the container isn't protecting anything. If you have a faraday cage that isn't grounded then all you have is a fancy bug proof, high air flow box. Also see Starfish Prime - Wikipedia, the free encyclopedia for real world tests. I was going to type a lot more but my laptop battery is about to die and didn't bring the charger so I need to shuter down.