<unk> es can result from various types of incidents ranging from industrial accidents to deliberate attacks. High-order explosives produce a supersonic overpressure shock wave, while low order explosives deflagrate and do not produce an overpressure wave. A<unk>  wave generated by an explosion starts with a single pulse of increased air pressure,<unk> ing a few milliseconds. The negative pressure (suction) of the<unk>  wave follows immediately after the positive wave. The duration of the<unk>  wave depends on the type of explosive material and the distance from the point of detonation. The<unk>  wave progresses from the source of explosion as a sphere of compressed and rapidly expanding gases, which displaces an equal volume of air at a very high velocity. The velocity of the<unk>  wave in air may be extremely high, depending on the type and amount of the explosive used. An individual in the path of an explosion will be subjected not only to excess barometric pressure, but to pressure from the high-velocity wind traveling directly behind the shock front of the<unk>  wave. The magnitude of damage due to the<unk>  wave is dependent on the peak of the initial positive pressure wave, the duration of the overpressure, the medium in which it explodes, the distance from the incident<unk>  wave, and the degree of focusing due to a confined area or walls. For example, explosions near or within hard solid surfaces become amplified two to nine times due to shock wave reflection. As a result, individuals between the<unk>  and a building generally suffer two to three times the degree of injury compared to those in open spaces.
Blast injury
Microtrauma
Avulsion injury
Barotrauma
Blunt trauma
Penetrating trauma
Closed-head injury
Running injuries