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Old 2021-03-23, 13:54   #19
Dr Sardonicus
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Feb 2017

2·52·107 Posts

Originally Posted by Xyzzy View Post
We don't remember why they are measured by height, but we do know that is how it is done. In a previous life we attended a military school to learn about nuclear and chemical weapons. One of the main things we studied was how to do downwind hazard predictions and how to calculate yield. This was almost 30 years ago so we don't remember much.
My guess: The bigger the explosion, the bigger the fireball. The bigger the fireball, the higher it rises before "mushrooming out." Of course, if the fireball is big enough, it can hit the tropopause, which is like hitting a lid. The effect is seen in the "anvil tops" of thunderstorm clouds.
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