But the thing is that your calculations relating to hydrostatic pressure, atmospheric pressure, etc., may well be correct but you are failing to connect them in any way to seismic activity deep down in the crust, "deep down" being where almost all severe earthquakes originate. All very interesting but ultimately worthless speculation unless you have evidence. Sorry to keep harping on about this, but studying it for years and coming up with imaginative ideas are NOT evidence, not in the remotest way.