There is good information on bolting sills to the foundation, reinforcing cripple walls and strapping water heaters at  California Office of Emergency Services and also at the  Association of Bay Area Governments (ABAG) .

    General earthquake information is available at  USGS .

    Information on the Sureview Threaded Rod Connector. The best way to insure your holdowns are properly connected at tie rods splices.  Sureview.com .