Skip to comments.Why and how to protect your gear from EMP
Posted on 10/21/2012 1:25:23 PM PDT by Kartographer
The first thing that we need to look at is the distinct lack of information available about EMP and its effects. Most of what we know is from nuclear tests, both American and Soviet, in the 1960s. Data and information after that period is still highly classified, so all we have to go on is what has been declassified from this earlier era of tests. However, this information, along with a few pieces of recent data, is enough to make some reasonable projections.
The second thing we need to understand is that a HEMP attack on the United States is about as bad as it gets. Experts predict that 70% 90% of Americans would be dead within 12 18 months after an EMP attack. The reason for this is the extreme dependence on electricity and the delocalization of resources, like food, water and sanitation abilities.
EMP is survivable, but you need to start preparing for it now. Unlike other disasters, there is no warning or precursor, and no ability to, finish prepping, once it occurs. EMP is an instantaneous event. One second after an EMP attack, its lights out forever.
(Excerpt) Read more at thesurvivalmom.com ...
Well, Mr. Roddenberry was wrong about Chicago’s water supply; it’s next door in Lake Michigan, all billions and billions (maybe more) gallons of it. The rest of his comments are probably correct though. If he means the computer systems that control the water, well that’s the same for everyone, as well as the utility systems, transport systems, etc. We’re all screwed, at least for a while.
My understanding is just cars with electronic ignitions
Lake Michigan remains the main source of water in the metropolitan area. In 1900, the Sanitary District of Chicago completed the 28-mile Sanitary and Ship canal to reverse the flow of the Chicago River away from Lake Michigan, thereby improving the quality of lake water. Canada as well as neighboring states opposed the diversion of Lake Michigan water, and Supreme Court decisions limited the amount of Lake Michigan water that could be diverted into the Sanitary and Ship Canal (1930) and the water supply for Illinois communities (1967). As a result, the amount of water which any community in the state may draw from Lake Michigan is regulated by the Illinois Department of Transportation’s Division of Water Resources. Because of these legal limitations on Illinois’ use of Lake Michigan water, new allocations come at the expense of existing users and contribute to the continuing highly charged debate about water in the Chicago area.
I saw this list AFTER I purchased my 12 acres on an entire finger of a plateau in Central, rural KY. It fits it almost precicely:
It is not on a major freeway or interstate.
It is at least several hundred feet above sea level.
It is surrounded by farm land, dairy cows, and other typical farm livestock such as horses, pigs, sheep, goats, and chickens.
It has a history of good average rainfall (not too much rain or too little rain).
It has a reasonable supply of trees and forest timber land.
It has a few nearby manufacturing facilities of any size.
Its residents still have the right to own firearms to protect themselves.
It has short mild winters.
And our chickens lays 5 eggs a day, and two thirds of them are too young to lay.
Thing is, I ask myself what the day after a Romney victory would look like, and I don’t like the answer. It would probably not be any better. But to be clear, that is juxtaposed against things tanking fast if Obama had won re-election.
I don’t believe there is a human solution to our dilemma, and it is worldwide. It’s gonna leave a mark. A worse mark than WWII left.
EMP might be part of it, but I have an early 60’s tractor and bicycles. We’ll get by, albeit challenging. And that is assuming we don’t have to defend it against others. I don’t expect a “road warrior” or “The Road” scenario, but I think it will get pretty bad, regardless of who wins the election.
Let me recommend someone that I’ve had good results with.
They have the best solar battery charger and radios that I’ve found. As well as other useful items
C.C. Crane Try them...
Hate to say it, but a lot of this information is bogus too.
I am have been involved with EMP shielding for air force electronics and navy ships.
You have to have a ferrous metal and you have to have it completely surrounded by the Ferrous Metal.
The only item in this article that may work with some modification is the galvanized steel garbage can.
Faraday Cages block electromagnetic radiation, but that isn’t the only energy delivered by an EMP. You have to incorporate a Faraday Cage but other concepts as well.
The trick to EMP is grounding the ferrous metal and set up the metal to bend the magnetic waves around the objects you are trying to protect.
You can’t block it, you can only bend it.
Heck, you could take away their cable and smart phones and riots would occur.
Ground it and what else would you do to modify the steel trash can to bend the magnetic waves? Change its shape?
Hate to say it, but a lot of this information is bogus too.My brother builds EMP-proof rooms, both for medical equipment (i.e. CAT and PET scanners), as well as for "bug-proof" rooms for the government, and he has commented several times about how difficult it is to get the room "right".
Oftentimes, a seemingly minor kink in the flashing or gaskets around the doors can completely undo the isolation of the room. They often spend considerable time scratching their heads, trying to figure out why the room doesn't perform as designed, before finally realizing that some minor detail wasn't quite right.
For what it's worth.
So, since we don't know WHEN an EMP might occur, are we supposed to wrap all of our electronics in grounded garbage cans now, and keep them there until it happens? Seriously?
A few cases of foil wrap from Sams Club won’t work?
EMP/HERF/Shock Pulse Generators
This EMP Cannon Stops Cars Almost Instantly
If EMP was only microwaves, it would work, but that isn’t what EMP is
EMP is broad-spectrum, xrays, neutrons, gamma, radio, etc....
I don’t know when a house fire might start either, but I am prepared with extinguishers, yet I do not have a fire truck parked in the driveway and everything in the house wrapped in fire retardant blankets. You place spare parts and small electronic devices in protective enclosures. Just things you might need to get by.
The best preppers use common sense a dwindling commodity in the world as a whole and seemingly even here of FR.
That is true for EMF, but this is EMP, similar but not the same.
Your room is going to get hit with broad spectrum energy.
Don’t forget the AFDB to stop that EMP!
Does not work. The proof is if it did,neither of you could be posting.
My college physics is decades behind me now, but the EMP field will decrease by either the square or cube of the distance which makes me wonder just what the effective range of an EMP weapon would be, especially if it were a low sophistication fission weapon rather than a russian or chinese fusion weapon.
I know that the pulse would take out large transmission lines but I wonder what the effect would be on something not plugged into the grid sitting hundreds of miles away from the detonation.
Right Angles do work the best.
A Iron Box like a safe is actually one of the best shapes (if completely sealed), the problem is you have to align it to the poles of the blast to get the optimal protection.
since that is impracticable, the best is to either be able to electrolytically align the cube or have a sphere with many points of entry and exit for the magnetic waves.
Also, if you want to get some real basic
You want a point in which the waves enter and leave. If you can’t do a sphere, a cylinder is the next best.
You have to have it completely sealed with ferrous metal though.
For the galvanized garbage can (which I wouldn’t use due to hidden defects), I would first turn it upside down. Put your stuff on the lid instead of down inside the bottom when you are ready to close it up.
Next, strip the galvanized coating off the lead and the lip of the can so you get bare metal to bare metal.
Put in a ground strip to the inside of the can to the lid. Make sure not to create a hole in the metal. Copper Brad Grounding wire works the best.
Follow all the other instructions on the blog accept substitute flame proof lagging material for the cardboard.
Put your stuff into mylar bags with desiccant, now weld it up. Yes, Weld it shut.
Put the entire can at least 6” deep in the ground and use a copper grounding stake to ground the entire thing.
If an EMP happens, cut open the can and enjoy your working electronics. (assuming you aren’t close enough to get hit by higher energies)
For more examples of this: http://www.coolmagnetman.com/magshield.htm
Remember, you need multiple shielding for emp. Different energies require different materials and techniques.
Some good information here:
Nuclear Weapon EMP Effects
Here's the thing: there are a whole range of frequencies of geomagnetically-induced currents that can be produced from a single nuclear explosion in the ionosphere, but MOST of them are very low and important to power distribution systems, not individual pieces of electronics. This does NOT have much to do with the yield of the bomb in kilotons; it has much more to do with the tuning of the gamma ray energies, which in turn produce Compton electrons, which flow to produce the EMP itself. It also somewhat varies with the explosion altitude, and the ionozation level of the atmosphere (therefore, the time of day, and solar activity). Mostly, we don't know. But we can take examples like Starfish Prime test and the Russians' Khazakh test, to look at what would happen.
In my opinion, FAR TOO MUCH emphasis is put on what an EMP would do to individual electronic devices or vehicles. I guarantee you: there will be people whose pacemakers are not affected by the EMP. There will be 2000 and newer cars that will still be running after an EMP. This will be determined by the particular field strength in Volts per Meter, and the frequencies making up the pulse, in that particular area. There will be peaks and there will be troughs, determined by landscape, urban structuresm, etc. There will be direct line of sight, there will be reflections, and there will be shadows.
One thing that is for CERTAIN, though, are the low-frequency geomagnetic currents, and that long-distance power lines CANNOT hide from them. There is no shielding when the entire EARTH conducts them. In the Russians' Khazakh nuclear test (#184), a 1000-mile-long underground power line was completely fused. And it was 600 km from the point under ground zero.
So, in summary, in a significant EMP attack, our power grid is going DOWN, permanently. Millions will die just from that. But your electronics may work just fine.
Hell you could just hand out free tennis shoes
When they say affect the entire CONUS, it doesn’t give a good estimate of the power density of the effect at a distance. Unfortunately, I live right in the middle of the CONUS so I would get the most effect if it went off over Kansas, but somebody in Virginia my just have a measurable pulse wave but not enough to knock out electronics which aren’t plugged into the grid.
Like I said, I just don’t know but the energy density should drop off quickly with distance.
Old microwaves are farraday shields, can pick them up real cheap. got my radios, batteries and other electronics in them for lt storage.
So I guess that lucky fellow that Max his credit cards to by that tricked out AR 15, 10K of ammo, food and water for 2 years wins?
So no working servers, no hard drives. Does that mean all the money I owe is gone? We all start at zero?
No fuel, memo to keep that bike.
Note to those pesky rabbits in my garden, be nervous.
Note to my chickens, need more eggs.
Note to me, buy a rooster, will need more fertile eggs.
Note to finish that hand pump well...
Note to me to buy a bunch of antibotics from the feed and grain store. My goats and maybe me might need them.
It depends on several variables. The yield of the weapon, design of the weapon, the altitude of its detonation, distance, and terrain. EMP is line of sight so if you're behind a mountain you may be ok. The only protection not plugging stuff in would offer is from secondary surges. Not plugging something in offers no protection from EMP.
I’m just finishing “Adrian’s War,” the sequel to “A Distant Eden.” I recommend both books, just for the illustrations of what is probable in the event of a HEMP. Both books are available for kindles.
Unfortunately, I am the idiot that alerted the leadership to this problem and expected them to keep it quite. It was part of my response to “but the Chinese only have 13 missiles”. I told them it only takes one to blackmail us into giving up Taiwan and South Korea. The longest pole in the tent is a fundamental part of our electrical grid that is only made in France and it usually takes 6 months to get just one. That is because it almost never fails. The bad news is that it doesn’t matter what you save. Everybody else is off the air. The good news is that shit would poor in from around the world in days. Think very simple diesel engines for transport and power. If I were to put anything in a Faraday cage, it would be a back up generator to light the night.
I guess I wasn’t clear, a voltage spike in a transmission line can travel with little dissipation, whereas the emp pulse decreases at a logarithmic rate with dist
In this case how far away is far enough if an Iran detonated a nuke over Kansas.?
you can cross your fingers and hit the main breaker and ground out all your circuits. If the EMP in line of sight of your home though, your stuff is toast regardless.
Washington State did a study which found that a single small bomb over Kansas could effect most of the United States. IMO thats a worst case of only one bomb.
They’d probably use more than one bomb.
There are a million variables. Unplugging offers protection against lightning but isn’t part of my EMP strategy.
I have aluminum siding on my home and have to go outside for any cell phone conversation. Would an aluminum sided house have any protection against an EMP?
Anything conductive will offer some protection. However a faraday cage has to be 100% to provide complete protection. The items inside also have to be insulated from the shield.
Picture a metal device in a microwave at max setting. Not pretty. Now picture the microwave the size of the sky set at 1000%. Ugly
Newer vehicles may fair better due to the built-in protection needed for the HEI type ignition systems. But again anything else not tied into the ignition system may not make it. Fuel pump(motor windings)? Solenoids? Small sensors (Inlet air temp/flow) MAP/MAF.
The military folks know how important EMI protection is in aircraft and vehicles.
EA-6B’s and F-18G’s fly pods that can literally fry electronics as they fly over enemy airspace 10’s of miles away. (Blinding the enemy radar and comand-control systems)
HEMP is much bigger.