This is what I would call a 'rough' subduction zone, not like Japan. That means we may not have M9's, since it is so curved, just M8's. And not very often. They do have some cute volcanoes to maintain the islands.
This is a mixed solution, a bit of everything, mostly strike-slip. Probably just means stress adjustment in the upper block.
Yeah, one of my favourite random street view shots near the epicentre. Who needs to go anywhere? :)