The NRC has committed itself to reassessing earthquake risks at nuclear plants.
In terms of North Anna: 'Not so fast we're not done,' says the Nuclear Regulatory Commission.
Dominion has a theory on why the nuke shut itself down, but it is unconfirmed:
Dominion officials said it now appears the reactors shut when the earthquake caused a problem inside the cores at both units rather than from the loss of outside power to the plant as initially reported.
"It looks like the (fuel) rods were going into the core prior to the transformer opening," possibly from a relay problem, a Dominion executive said.