From the article:
“.... The Wanke Harbor City development was just a few hundred meters from the blast site. Now it was a pile of rubble. Not a single window was intact. Household items were scattered everywhere.
I don’t know what kind of quake happened there last night. Stuff had been thrown towards the site of the explosion. But shouldn’t the shock wave have sent stuff in the opposite direction?
I still don’t get it. ....”
Now what kind of explosion causes that sort of effect?
A big one.
The blast shatters and makes airborne vast quantities of debris.
As soon as the fireball starts to cool and rise into the air that creates a ground level flow towards the center, that sucks the suspended debris towards the center.
Or think of it like a tsunami, the incoming wave busts stuff up, the retreating water sweeps the debris into the sea.