I'll have to dig out the link but according to fairly recent US government testing most WILL be perfectly driveable after being exposed to an EMP. In virtually all cases where the car was turned off, there was absolutely no impact and in something like 75% of the cases where the car was running, it simply stalled and could be immediately restarted with anywhere from no damage to systems to minor systems damage.
none1 wrote:SO, if most cars directly struck by lightning are driveable aftewards, why would an EMP fry all cars so they won't be driveable?
Edit: Oops...I didn't notice that Bunsen had already posted pretty much what I just said.
You're talking about this aren't you???
From what this article says ...Nuclear Electromagnetic Pulse by Jerry Emanuelson Futurescience, LLC (*Click*)
....many motor vehicles would still run after an EMP test. The vehicle would just go dead initially from the EMP pulse and you'd have to work on it and have the necessary car/truck parts and knowledge to get it running again.
Many of the effects of nuclear EMP are very difficult to predict on the 21st century United States. Many vehicles that one would expect to be disabled by an EMP due to their dependence on sensitive electronics might be shielded well enough to continue to operate. Automotive electronic ignition systems in general are much better shielded and protected against EMP than other electronics. (After all, the purpose of an electronic ignition is to make high-voltage sparks.) Circuits in the automobile outside of the electronic ignition are actually the most vulnerable. Actual tests on vehicles in simulators have been very inconsistent. Even if only ten percent of the automobiles on the highways during the day were abruptly disabled, the resultant traffic jams would be nearly incomprehensible. (Having ten percent of the cars suddenly disabled might actually be more chaotic than having nearly all of them suddenly disabled.) Of course, there is no practical way to do a real nuclear EMP test. Even a nuclear test in space over the Pacific would likely do billions of dollars in damage to today's electrical and electronic infrastructure in the Pacific region.
Tests done on 37 vehicles (that used electronic ignition systems) by the United States EMP Commission showed that all of the tested cars would still run after a simulated EMP, although most sustained some (mostly nuisance) electronic damage. Only about one in every ten million civilian automobiles and light trucks in use today have been tested in an EMP simulator. That is a very tiny sample size. Many cars that would run after an actual EMP would probably have to be started in an unconventional manner (such as temporarily jumpering wires under the hood) due to damage of control circuits.
Reports about the effects of the 1962 Starfish Prime test that have been declassified in recent years state that some of the automobiles in Hawaii had their old non-electronic ignition systems damaged by the EMP, so automobile damage may be much higher that we previously thought. Most of the people whose cars were damaged by the Starfish Prime test probably never related their car ignition problems to the nuclear test. The damage to diesel generators in the 1962 Soviet nuclear EMP tests indicates that some of the electrical damage doesn't show up right away. Although many people would like to know exactly which vehicles would continue to function after an EMP, the number of variables are enormous, and include the orientation of the vehicle with respect to the detonation point at the particular time that the device is detonated.
johnwiseman wrote:Power outages are a thing to prep for, no doubt. Look at the North east blackouts and and imaging that in your home town. But to prep your car for EMP? To worry about your motorcycle choice because of EMP? To try and build some cage thingy around your home because an EMP might brake your TV? Seriously, even if you did have the cage, wouldn't the EMP surge from outside your house blow up all your shnit anyways? I understand the idea of prepping for outages in general and I do myself. But worrying about an EMP specifically is BS.
No, not unless the EMP was from a nuclear weapon being detonated by hitting the ground. EMP can be a weapon all on it's own and it doesn't neccessarily have to come from an ICBM actually striking US soil. Such a weapon could be detonated far above the US in the atmosphere and still cause major havoc and chaos.EMP Effects (*Click*)
Understanding asymmetric threats to the US (*Click-PDF*)
As far as the actual power grid and almost all electronic devices goes they would definately be fried and it would take quite a bit of work to get things back to normal. From everything I've read it doesn't matter if the electrical device is plugged in or not, the Gamma Rays will still effect and damage it if it's within the weapons line of sight. The blast has to be within the weapons line of sight though, the Gamma Rays won't continue past the curvature of the earth. So if the EMP blast were detonated fairly low in altitude then the damage would be limited to a specific area.
The higher up it is then there's more damage.
Such an attack could be carried out by a number of nations like China, North Korea, Iran or technically 'friendly' nations like Pakistan or India (just because we have decent diplomatic relations with them today doesn't mean that this will always be the case).
At any rate it's a threat....I don't know how big of one it is or how likely it is to happen (I personally worry more about regular crime, flooding or tornados), but it's still a threat and it could happen.