Underground nuclear weapons (not for testing; as offensive weapons)

[Machine_Elf]

@brossa

I would not have been keen on being the first to buy new postwar housing stock in Nagasaki.

Radiation levels in Hiroshima and Nagasaki dropped pretty quickly after the bombings.

Post-bombing radiation levels in Hiroshima/Nagasaki?

This was helpful, thanks. It sounds like radiation levels faded relatively quickly after the bombing. From your link: These calculations showed that the highest dosage which would have been received from persistent radioactivity at Hiroshima was between 6 and 25 roentgens of gamma radiation; the highest in the Nagasaki Area was between 30 and 110 roentgens of gamma radiation. The latter figure does not refer to the city itself, but to a localized area in the Nishiyama District. In interpret…