Just to clarify I meant the old “hit somewhere in the city core” airbursts against which our underground shelters would have held up pretty well. To maximise impact a ground hit is seldom the right choice, too much energy is initially absorbed. (Also the fallout is made worse in a ground burst which can be a bad thing for an attacker if they want to follow up with boots on the ground.)
Just to clarify I meant the old “hit somewhere in the city core” airbursts against which our underground shelters would have held up pretty well. To maximise impact a ground hit is seldom the right choice, too much energy is initially absorbed. (Also the fallout is made worse in a ground burst which can be a bad thing for an attacker if they want to follow up with boots on the ground.)