Consisting of an overpressure shock wave followed by an outward blast wind, it will destroy or damage all built structures within a certain distance of the blast zone.
For example, a 15 kiloton bomb would have a fireball radius of about 100 metres and cause complete destruction up to 1.6 kilometres around the epicentre.
The shock wave travels faster than the speed of sound. So, if you’re one kilometre away from the epicentre, you have less than three seconds to find cover.
Finding safe shelter indoors, preferably in a reinforced bunker or basement, should be your number one priority.
