There is no further off, and closer, if the flood was global.it should have happened everywhere is Everest was below water. So it should be all, or not.
Obviously it was global to some extent. AFIC there were survivors.
What do you mean by "global to some extent?" Are you claiming it was a global shallow flood that only hurt coasts? Are you saying it was only certain continents?
The sediment movement something that ridiculous would have caused would have been very noticable. It would be impossible to cover up. There is no evidence to support such a wild idea.
I just mean that damages was probably not equal everywhere depending on how far you were from what triggered the water movement and the geographic landscape.
Nothing could trigger something like that. It would take magic. Physics wouldnt allow the continents to sink below the ocean or for water to flow up onto land out of the oceans.