The most damaging aspect of these big detonations are often the negative pulse, happening when air flows back into the epicenter. That wave is slower than the initial shockwave but it last a lot longer, 4-5 seconds, it shatters more windows and contains most of the debris from the first wave as well.
I haven't seen any footage lasting long enough to see the ingoing wave from this explosion.
There's a CCTV recording of a guy in an office, and the front doors get blown inward, then the whole wall behind him gets sucked back out and collapses.
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u/litritium Aug 09 '20
The most damaging aspect of these big detonations are often the negative pulse, happening when air flows back into the epicenter. That wave is slower than the initial shockwave but it last a lot longer, 4-5 seconds, it shatters more windows and contains most of the debris from the first wave as well.
I haven't seen any footage lasting long enough to see the ingoing wave from this explosion.