There is a chunk missing from the wharf. Is it due to a section collapsing, or something else?
That’sa crater blown into the land.
The depth of the crater should initially have been about one-quarter the 600 meter diameter. All the vanished material is dispersed around the surrounding countryside.
An explosive generated tsunami lifted the smaller ship and deposited it on the adjacent area. Ground interaction effects tend to degrade a shockwave in the near space to a contact detonation, lessening the overpressure damage very close in to the explosion.