What would happen if a Japan-like earthquake hits Silicon Valley?

HN traffic would drop suddenly...

I think one major thing is that SV is not exposed to giant tsunamis. Does anyone know for sure if the narrow entrance to the bay would prevent the kind of devastation caused by a tsunami? Could a tsunami be generated inside the bay? It seems to me that a lot of the damage in Japan (including the nuke plants) was from the tsunami not the earthquake itself.

The cool thing about building on the internet, is that you can build from anywhere!