Just want to point out the new Caledonia earthquake is at a 6.2mile depth, same depth as the 11/11/18 quake.

There was a post about how 6.2 miles is where the underground bunkers are. It's deep enough that they can connect under the oceans, but not so deep as to be up against the molten magma in the mantle.

Seems a bit out there, but we have humans living in space and barring seismic activity, this seems strictly less complicated than living in space.