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Blast radius (and other effects) varies with:

  • yield
  • burst height/depth
  • terrain
  • if subsurface, the material around the burst
  • inversion layer present or absent
  • etc.

Using my Nuclear Weapon Effects circular sliderule, assuming distance for 1 psi maximum overpressure as "blast radius":

A 1 KTon yield at optimum burst height on flat terrain: 1.35 miles.

A 1 KTon yield surface burst on flat terrain: 0.75 miles.

A 20 KTon yield at optimum burst height on flat terrain: 3.64 miles.

A 20 KTon yield surface burst on flat terrain: 2.00 miles.

A 10 MTon yield at optimum burst height on flat terrain: 29 miles.

A 10 MTon yield surface burst on flat terrain: 15.8 miles.

1 psi maximum overpressure was selected because structural damage to buildings due to blast wave and wind is minor, however glass, plaster, etc. damage will be much further out.

Except for thermal burns, most immediate radiation effects are also contained within this radius.

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13y ago

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