According to the U.S. Geological Survey, 42 states have a reasonable chance of experiencing damaging ground shaking from an earthquake, with 16 states having a relatively high likelihood.  Sunday’s magnitude 6.0 Northern California earthquake is a reminder for residents in all the 42 USGS-identified earthquake states to prepare before an earthquake strikes the area.  The nonprofit Federal Alliance for Safe Homes offers some actions residents and business owners can take to prevent injuries, property damage and post-earthquake fires, such as supporting ceiling fans and light fixtures using bracing wire secured to a screw eye embedded at least an inch into the ceiling joist.  Anchor the tops of bookcases, file cabinets, and entertainment centers to one or more studs with flexible fasteners.  Secure loose shelving by fastening screws into the cabinet or with museum putty placed at each corner bracket.  Secure china, collectibles, trophies and other shelf items with museum putty.  Install a lip or blocking device to prevent books or other articles from falling off shelves.  Secure televisions, computers, and stereos with buckles and safety straps that also allow easy removal and relocation.  And, install latches on cabinet doors to prevent them from opening and spilling out contents.  Also, hang mirrors, pictures and plants using closed hooks to prevent items from falling.  Cover windows with approved shatter-resistant safety film to protect against broken glass.  Ensure appliances have flexible gas or electrical connections.  Strap the top and bottom of a water heater using heavy-gauge metal strapping secured to wall studs.  Locate gas shutoff valve and know how to turn off the gas supply with the use of a specialty wrench.  And, relocate flammable liquids to a garage or outside storage location.  More free information and videos are available online at www.flash.org.