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Originally posted by AnonymousCitizen
Just for comparison. They look very similar to me.
Main articles: Electromagnetic pulse and Geomagnetically induced current
Gamma rays from a nuclear explosion produce high energy electrons through Compton scattering. For high altitude nuclear explosions, these electrons are captured in the Earth's magnetic field at altitudes between twenty and forty kilometers where they interact with the Earth's magnetic field to produce a coherent electromagnetic pulse (EMP) which lasts about one millisecond. Secondary effects may last for more than a second.
The pulse is powerful enough to cause moderately long metal objects (such as cables) to act as antennas and generate high voltages due to interactions with the electromagnetic pulse. These voltages can destroy unshielded electronics. There are no known biological effects of EMP. The ionized air also disrupts radio traffic that would normally bounce off the ionosphere.
Electronics can be shielded by wrapping them completely in conductive material such as aluminum foil; however, the effectiveness of the shielding may be less than perfect. Proper shielding is a complex subject due to the large number of variables involved. Semiconductors, especially integrated circuits, are extremely susceptible to the effects of EMP due to the close proximity of the PN junctions, but this is not the case with thermionic tubes (or valves) which are relatively immune to EMP. A Faraday cage doesn't offer protection from the effects of EMP unless the mesh is designed to have holes no bigger than the smallest wavelength emitted from a nuclear explosion.
Large nuclear weapons detonated at high-altitudes also cause geomagnetically induced current in very long electrical conductors. The mechanism by which these geomagnetically induced currents are generated is entirely different from the gamma ray induced pulse produced by Compton electrons.
Originally posted by Firefly_
Correct me if I am wrong, but don't nuclear explosions emit an EMP, which would knock out the electronics, including the camera which was being used to record it?
Originally posted by watchitburn
reply to post by Insurrection
From the video, I would estimate that to be at least 100,000 lbs. of conventional ordnance.
When we were testing it people thought it was a nuclear bomb.