An estimate of the dimensions in the damage caused by the 16 kt and 21 kt atomic bombings of Hiroshima and Nagasaki. The substantial temperatures and radiation lead to gas to maneuver outward radially in a thin, dense shell named "the hydrodynamic entrance". The front acts similar to a piston https://radiationzonemeaning41603.blog5.net/79116895/top-radiation-zone-aberration-secrets