Quote:
Originally Posted by tabs
Since 64 you have had Alaska at roughly a 9, You have had Indonesia in 04 at close to 9, Chile a a couple of years back at close to 9 and now in Japan a 9...so what piece of this Tectonic Plate map has still been quite? The only question is when...
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No piece of the tectonic plate has been quiet. Here in CA, we had the '06, M7.9, in SF, and the Fort Tejon, M8.25, in 1857. Geologically speaking, that's recent.
Tectonic plates are not rigid. Especially thin ocean crust. Ocean crust is very ductile over long distances. Pushing on the crust at one side of the Pacific Ocean will have no effect on the other side of the ocean. Plates are shoved around from below, by circulating magma. Local tectonic forces control fault movement.