Wow, two shock waves
this post was submitted on 09 Dec 2023
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Itβs looped for some silly reason
Just a pressure wave (below speed of sound). There might be a shock wave too (faster than sound) within the expansion of the fireball but the wave of fog after it is condensing water vapor in pressurised cold air. Same phenomenon that can be seen sometimes at the wings of (subsonic) airplanes.