Although simplistic fireball calculations predicted the fireball would hit the ground, the bomb's own shock wave bounced back and prevented this. The fireball reached nearly as high as the altitude of the release plane and was visible at almost away from where it ascended. The mushroom cloud was about high (over seven times the height of Mount Everest), which meant that the cloud was above the stratosphere and well inside the mesosphere when it peaked. The cap of the mushroom cloud had a peak width of and its base was wide.