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Everything about Underwater Explosion totally explained

An underwater explosion, also known as an UNDEX, is an explosion beneath the surface of water. The type of explosion may be chemical or nuclear. They are categorized in accordance with their depth beneath the water's surface, because this has a strong influence on their effects.

Effects

The effects that an underwater explosion will have at a particular place depends on a number of parameters; the energy of the explosion, the depth of the explosion, the depth of the water from the surface to the sea bottom, and the distance from the place to the explosion.
   Underwater explosions are categorized by the depth of the explosion. Shallow underwater explosions are those where a crater formed at the water's surface is large in comparison with the depth of the explosion. Deep underwater explosions are those where the crater is small in comparison with the depth of the explosion.

Deep underwater explosion

An example of a deep underwater explosion is the WAHOO test, which was carried out in 1958 as part of Operation Hardtack. The nuclear device was detonated at a depth of 500 feet (150 m) in deep water. There was little evidence of a fireball. The spray dome rose to a height of 900 feet (270 m). Gas from the bubble broke through the spray dome to form jets which shot out in all directions and reached heights of up to 1700 feet (520 m). The base surge at its maximum size was 2½ miles (4 km) in diameter and 1000 feet (300 m) high. Many of the theories and concepts about these waves are similar to those that are applicable to other types of surface waves, in particular, tsunamis, and waves generated by the fall of a meteor.

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