[Bring_Back_Shantz]

Originally Posted by Baron von Kriterium

550 kilotons is a large explosion.

The damage will depend on the over pressure (in psi). For example, 1 psi will blow out windows; 3 psi will destroy residential homes; and 5 psi will destroy all buildings. It seems to me that reinforced concrete and stone buildings did not collapse along the road Charles Helou, which is approximately 600m from the explosion epicentre. A multiple kiloton blast would have levelled some/all the buildings.

As an example, here is a building along Charles Helou:

https://twitter.com/user/status/1290710681323528194

It was geo-located at 33.895996° 35.517266° so that puts it 620m from the warehouse. There appears to be buckling in the building's structure, so let's call it 3 psi over pressure. The scaling constant for 3 psi is 1.0. Thus...

Range (km) = Yield(Y)^0.33*scaling constant (bl)
0.62=Y^0.33*1.0

Yield, Y = approx 0.240 kt TNT equivalent.

Now, obviously there are huge error bars.

His math pegs it at 0.55 kilotons, not 550.