The continental shelf would probably make it worse...not stop it..
Unfortunately with something that has apparently changed the Earth is such a way, you have to think that eventually everything will to back to the way it was. Will it take another big quake to do so?
that is the question...
If you believe in the science of plate tectonics, things will never go back the way they were at a previous time, but there will always be continuous change.
No. This is a pretty small change in a constantly changing Earth.