D'Compose height/Crater height = 522px or 11.7m
I'll use the volume of a rectangle since that's kinda what it looks like and since every other simular wall busting calc I've looked at for reference uses the volume of a rectangle as well.
Crater length = 340px or 7.62m
Crater Width = 54px or 1.21m
Volume of the Rectangle = 107.88m^3 or 107,880,000cm^3
Energy of Fragmentation (8 j/cc) = 863,040,000 Joules or 0.20 Tons of TNT (Small Building level+)