Gunfire and explosions are something we're not entirely unfamiliar with here in Belfast, but the audible range really is variable. When they bombed the forensic labs here (2000 lb van bomb) I was about 5 miles away and it rattled our windows and was loud enough that we thought they'd hit RUC headquarters, about half a mile away. On the other hand when a house 10 doors down the street from me was hit with a 5lb nail bomb I slept through it
