An estimate of the size of your destruction because of the 16 kt and 21 kt atomic bombings of Hiroshima and Nagasaki. The higher temperatures and radiation induce fuel to move outward radially in a thin, dense shell identified as "the hydrodynamic front". The entrance acts similar to a piston https://cruzcuiuf.scrappingwiki.com/1429686/details_fiction_and_scum_radiation_zone