Not sure on that one. The video you posted does show a blast wave - it spreads extremely rapidly in all directions at a uniform rate and proceeds in front of the flames. That explosion didn't happen in / next to a large body of water.The vapour seems to be a function of the "blast" wave. Look at these.
It was the end of my first deployment, and we had a certain number of materials that we needed to get rid of -- among those materials were several types Though the blast waves included in the videos below are easy to see, they don't have to be obviously visible to end someone's life.sofrep.com
The volcano at the bottom of first link seems to be most broadly similar in speed of expansion if not scale.
I've never dealt with a BLEVE, not sure any in UK have tbh, but from lectures and videos there seems to be basically a BFO fireball when the cylinder/tank/vessel finally fails. That being said who knows here, as seems to be near water. Make you right on the firework theory though as you said, many small pops beforehand.
(I did assume Israeli Airforce smacked some hezbollah factory but appears not to be)
Unless I'm mistaken, it was the white "vapour" that detonated in the big explosion so not water. I'm still sticking with a liquefied gas. Maybe not in a tanker, maybe rocket propellant stored in bulk. Difficult when people start storing munitions in food warehouses.Not sure on that one. The video you posted does show a blast wave - it spreads extremely rapidly in all directions at a uniform rate and proceeds in front of the flames. That explosion didn't happen in / next to a large body of water.
If you go back to the first video and do some quick pausing about a second in you will see a blast wave progress across the sea to the left, the water vapour proceeds much more slowly (relatively speaking) and outwards slower than the flames.
The water vapour is also not uniform, there are two 'bands'. I would have thought a blast wave would lead to an even 'shell' around the centre of the explosion.
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I fully accept I could be talking out of my arse. The speed of sound in water being much larger than in air could account for the blast wave out to the left for one thing.
Edit - for comparison, from the video you linked to:
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