Absolutely nothing exceptional about this earthquake except that it is smack dab in the middle of the next subduction curve up from the last big Japan earthquake. That little curve produced an M9, this one is three times longer so it can get up to an M9.3. The shaking wouldn't do anything, since it is so isolated, but it would make one heck of a tsunami! Besides, I really like this picture. :) As I have said before, you can only get these beautiful landforms by having M9's pop off every few hundred years. Otherwise,they would all fill in with goop.