electromagnetic pulse

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electromagnetic pulse

[i¦lek·trō·mag′ned·ik ′pəls]
The pulse of electromagnetic radiation generated by a large thermonuclear explosion.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.


(ElectroMagnetic Pulse) A natural or man-made burst of electric or magnetic energy in the atmosphere. With frequencies below the light spectrum, a nuclear bomb, lightning strike or a device designed to emit such a pulse are sources of an EMP. A massive solar eruption (solar flare) can also disrupt communications satellites.

Weaponry specifically designed to target an area with an EMP have been speculation for decades; however, regardless of the type, the distance from the source to an electronic device determines the damage.

Data Protection
Hard drives, SSDs and flash drives are susceptible to EMP damage, whereas optical discs are not. In order to survive an EMP, drives should be stored in a protected container (see Faraday cage).
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References in periodicals archive ?
When an EM pulse strikes a target, there is a prompt response resulting from the signal striking the skin of the target, followed by a later response due to target ringing or natural resonance interactions.
Distance is determined by the time it takes an EM pulse to make a round trip from the radar system to the object and back.
The horn is excited by electrical pulse and radiates an EM pulse that is enriched by high frequency harmonics.