Electro Magnetic Pulse
Electro Magnetic Pulse (EMP) effects by e.g. a nuclear explosion and pulse-generating devices may be comparable to geomagnetic disturbances. The resulting electric and magnetic fields may couple with electrical/electronic systems to produce damaging current and voltage surges. Both EMP and Geomagnetic disturbances may seriously affect to undisturbed working of Critical (Information) Infrastructures.
Note: In the case of a nuclear detonation, the electromagnetic pulse consists of a continuous frequency spectrum. Most of the energy is distributed throughout the lower frequencies between 3 Hz and 30 kHz.
HEMP: high altitude electromagnetic pulse IEMI: intentional electromagnetic interference NNEMP: non-nuclear EMP