From what I see in Russian-language news, only relatively minor damage. I've lived in Petropavlovsk, it's an ugly city in various states of disrepair, but they do take seismic reinforcements seriously, like mag 7 should cause zero damage according to plan.

It's basically immune to tsunamis as it's protected by a bay with narrow entrance that extinguishes the waves, also most of the city is raised at least 10m above the sea.