EMP

I love apocalyptic fiction but the one book that scared the shit out of me was One Second After. That painted a very real picture of what would remain after an EMP. 

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"Three nukes detonated at specific altitudes would take out the entire power grid of north America, save for maybe the southern tip of Florida and some areas of southern Texas."

Citation please.

dhughes - 

"Three nukes detonated at specific altitudes would take out the entire power grid of north America, save for maybe the southern tip of Florida and some areas of southern Texas."

Citation please.

A high-altitude nuclear detonation produces an immediate flux of gamma rays from the nuclear reactions within the device. These photons in turn produce high energy free electrons by Compton scattering at altitudes between (roughly) 20 and 40 km. These electrons are then trapped in the Earth's magnetic field, giving rise to an oscillating electric current. This current is asymmetric in general and gives rise to a rapidly rising radiated electromagnetic field called an electromagnetic pulse (EMP). Because the electrons are trapped essentially simultaneously, a very large electromagnetic source radiates coherently.



The pulse can easily span continent-sized areas, and this radiation can affect systems on land, sea, and air. ... A large device detonated at 400–500 km (250 to 312 miles) over Kansas would affect all of the continental U.S. The signal from such an event extends to the visual horizon as seen from the burst point.

![](upload://v1jnPT52u0l6sP2xcbXIUbVex9D.jpeg)

Here's a nuclear physicist on the threat of an EMP attack:

https://www.thespacereview.com/article/1553/1

Freeman Dyson's take on the threat of EMPs:

What also came out was the surprise by some that EMP was being discussed as some sort of existential threat to society. “I am not an expert on the subject of EMP, but I am generally familiar with the relevant physics,” stated renowned physicist and mathematician Freeman Dyson, in an email to me. “I was surprised when I heard that Jack was working on the problem, because I had the impression that nobody who was technically competent believed the scare stories about EMP. I thought that Jack was flogging a dead horse. But it is possible that the horse is not as dead as I thought it was.”

time to stockpile porno mags

dhughes -

"Three nukes detonated at specific altitudes would take out the entire power grid of north America, save for maybe the southern tip of Florida and some areas of southern Texas."

Citation please.

yeah everything i've read on NNEMP's is that it's all theoretical and many top scientist despute even NEMP's having any series affect on the electrical grids and products due to modern electrical device construction and safeties.

of course not talking about your at home mp3 player but actual devices an emp would be targetting

Set off EMP. Blame ALIEN invasion. World reset.

your welcome. 

AnotherFailedTest - 

Set off EMP. Blame ALIEN invasion. World reset.

your welcome. 

Haha it would be fitting for 2020.

Pretjah - 
dhughes -

"Three nukes detonated at specific altitudes would take out the entire power grid of north America, save for maybe the southern tip of Florida and some areas of southern Texas."

Citation please.

yeah everything i've read on NNEMP's is that it's all theoretical and many top scientist despute even NEMP's having any series affect on the electrical grids and products due to modern electrical device construction and safeties.

of course not talking about your at home mp3 player but actual devices an emp would be targetting

I have a feeling this is nonsense, since the effects on powergrids were known since the 50s and 60s… documentary incoming.

https://youtu.be/WRmGYZ5EIco

shit thats not it. I cant find it. The documentary was called “The Rainbow Bombs: Starfish Prime” or something like that.

and i'll aslo throw my support behind 'One Second After'  great book.  very entertaining and an easy read.  i finished it in 3 days.

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Good info. Keep it coming.

Should we get EMP proof locks on our gun safes?

I mean, for those of us who did not lose our safes in a fishing accident.

^NO.

As many others have already stated, this is all technophobic scare bullshit with the tiniest nugget of truth, not actual reality. EMP is subject to the inverse square law like all electric & magnetic phenomena. The magnetic field from your car’s alternator isn’t deleting the strips on your credit cards in your wallet. Anything able to wipe out cities is so massive, the EMP component of it is the least important part.

EMP as a WMD is inefficient & pipe dreamy. It can be done as a targeted weapon, so I suppose if you’re worried about a dude coming into your house with the intent of disabling your safes, maybe you can work on a strategy for that.

Why would DHS issue a warning if it's a non thing? Thanks

jscorbett - 

Why would DHS issue a warning if it's a non thing? Thanks

Not gonna speculate on that but the science just isn't there to support it as the threat you read about in prepper novels.  EMPs are real.  And if the Universe decided to send a big one our way via supernova or whatever it could be an end-of-days situation.  But no technology humans have can deliver on those fears.  

Even if someone could, it would still come with all the consequences of a nuclear attack.  Mutual assured destruction, etc.  The US would respond with a full-on nuclear response to any nation that attacked with an EMP.  

And hey, if I'm wrong, I'll pay pal everyone in this thread 2 million dollars after society is rebuilt.  Unlike some others on here, that's a promise you can BANK on.

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“Why would DHS issue a warning if it’s a non thing? Thanks”

The DHS report is about China (a nuclear superpower)'s ability to perform a targeted attack on the US power grid.

“Nuclear superpower” & “targeted” being the key words.

They aren’t talking about terrorists smuggling in tech that will disable your fucking battery powered gun safe from the big city.