detonation-accident-chance

[Erik Jessen]

(table detonation-accident-chance
  (BB t* 10.00)

This is from 'Godzilla'.  Does this mean there's a 10% chance per turn of
one burning building (BB) detonating,
or that every burning building has a 10% chance each turn of detonating.

The online docs aren't clear.

Thanks,
Erik