Guys,
The same tectonic plate that caused the quake in Christchurch has now devastated Japan and China.
People in California, should be prepared for at least a substantial jolt.
Make sure you have provisions, like food, batteries for flash-lights and most of all water and fuel.
This is my opinion only, but I'd hate it if you folks suffered as much as those in Christchurch or Japan have.
Stay safe.
Mike.