The fireball created by the explosion had a maximum radius of . The maximum radius was reached a number of seconds after the detonation, during which the hot fireball lifted up due to buoyancy. While still relatively close to the ground, the fireball had yet to reach its maximum dimensions and was thus approximately wide. The mushroom cloud rose to an altitude of in less than 90 seconds. One minute later it had reached , before stabilizing at with the top eventually spreading out to a diameter of with a stem wide.