It is a good idea ...
...to have safety equipment on your car like seat belts, airbag, windshield wipers, and maybe a horn, but all of those won't do a lot of good if you don't have brakes.
Likewise it is equally important to have emergency items at home, like food and water supplies and have your water heater strapped, but much of this will be a total waste if you lose your whole house because it wasn't bolted.
Allan G. Lindh, Chief Seismologist, at the U.S. Geological Survey in Menlo Park states, "Recent quakes in the Mojave Desert are among the largest in state history, are a 'final warning' that the Big One on the southern end of the San Andreas is just around the corner" and, "It's time to act if the damn thing will happen tomorrow."
For citizens of California or other earthquake-prone regions, Lindh says, "Safety is a simple matter of bolting houses to foundations and paying attention to the 'duck and cover' drills that have been part of Earthquake Preparedness Week every April since 1985."