That is a reflection of the explosion on thew ground off the smoke.
Warehouse containing ammonium nitrate is on fire heating it up causing it to fume. This will act as an oxidizer.
Next there is and explosion (#1) which releases grain dust from the adjacent silos providing fuel to the oxygen rich environment.
Then there is another explosion (#2) which ignites the mixture.
The video from the back side is what got me thinking along these lines, where you can see the large dark cloud rise from the silos prior to it igniting and forming a mushroom cloud of vapor.
The silo would have also directed the explosion like a shape charge and the water would have behave as a water impulse charge amplifying the damage.
So the dead and injured was worth the price anon? You really think that Q would have done that.
The stuff was already on the ground to make it go boom.
That is a much better question is the who. Someone setup the pretext in 2018 by calling it a ammo depot, which gives you and excuse if you get caught blowing it up. I think that the mix was ignited in the second white explosion right off the water. Which would be a reason for the E3 and E8 if some one hit it from the water.
My theory is here.
I did spend a year with CIED in Afghan and I am not talking about your run of the mil route clearance engineers.