File:Urm al-Kubra Attack blast area 1.png

Discussion
Left, looking down:
 * red square is app. worst of the blast pressure wave.
 * But heat bucking could contribute there more, too. --Resup (talk) 14:26, 5 October 2016 (UTC)


 * Blue marks where there's apparent shrapnel marks. The tailgate was pierced twice (while up, so the flip marks), at an oblique angle, and maybe hit the opposite wall. Force is low, slightly behind the trucks.
 * Somewhat where the relevant blast should nave been.

The general band of the shrapnel marks slopes up, seems to me. A perpendicular to this (possible origin of fire) would be from the south, nearby, coming in steep. Might be the same band of shrapnel here is what marked the facade of the warehouse not far to the north. That could clarify the issue - that blue band is not extremely clear.

Right: damaged house: The northwest corner is just meters from the back of the truck (correlated orange box - (near cleared patch, toilet paper, two boards). The whole outer hall?) is down, but the damage may not all be from the blast. The walls have toppled outward, and floors and roof just collapsed. Seems the corner was removed, and a general shock wave took out all but the furthest, slightly more supported area. It was not a strong building. To me, direction of blast here is totally unclear. If there's no reason to think this was a second blast in the same area, I'd say the collapse shows nothing about direction, and the same possible FAE blast did all this - it came from the south, perhaps, hit closer to the house, annihilated that corner, made a crater we can't see, buried in rubble. --Caustic Logic (talk) 12:54, 5 October 2016 (UTC)


 * Notice, that both trailers have been moved by the blast. The leftmost trailer sits on top of the central roundabout in a position where it could not be driven to. -- Petri Krohn (talk) 14:04, 5 October 2016 (UTC)
 * I doubt truck will be moved by pushing on those weak sides; not that tires are still mostly intact, so not a huge blast. Trucks could be parked on a divider to make the road clear. Also White Helmets have heavy equipment, of such sort, and it could be used to push off road after the strike --Resup (talk) 14:26, 5 October 2016 (UTC)

The building
Google Earth shows the destroyed building was constructed in 2013, at a time when Urm al-Kubra was already in rebel hands. The building lacks the pilar-and-slab construction of practically all Syrian buildings. Instead the floor slabs are supported by the flimsily built outer walls. Any normal building would have survived the blast without collapsing. -- Petri Krohn (talk) 14:01, 5 October 2016 (UTC)