Nuclear explosions are usually divided into air, ground (surface) and underground (underwater).
An air is an explosion whose luminous cloud does not touch the surface of the earth (water). Depending on the power of the ammunition, it can be produced at a height of several hundred meters to several kilometers. There is practically no radioactive contamination of the area during an air nuclear explosion.
A ground (surface) nuclear explosion is carried out on the surface of the earth (water) or at such a height that the luminous region of the explosion touches the surface of the earth (water) and has the shape of a hemisphere. Its radius of damage is about 20% less than air. A characteristic feature of such an explosion is a strong radioactive contamination of the area in the area of the explosion and in the wake of the movement of the radioactive cloud.
Underground (underwater) is an explosion produced underground (under water). The main damaging factor of an underground (underwater) explosion is a compression wave propagating in soil or water.
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