"One of the most severe earthquakes recorded in the U.S., with an estimated magnitude of 7.0, occurred in 1812 along Missouri’s New Madrid Fault. A recurrence of that event today would virtually destroy the city of Memphis, Tennessee. Some experts believe that the public is totally unprepared for an earthquake of that magnitude in the same location, which is inevitable...While the United States experiences only 2 percent of the world’s earthquakes, much of its population lives in seismically active areas. According to the U.S. Geological Survey (USGS), the probability that one or more earthquakes of magnitude 6.7 or larger will strike California over the next 30 years is nearly 100 percent. Additionally, there is a 63 percent probability that an earthquake of magnitude 6.7 or larger will strike the San Francisco Bay area over the next 30 years.
California is known for its susceptibility to earthquakes, but other states are also at high risk, including Alaska, Hawaii, Washington, Oklahoma, Kansas, and Missouri.
Earthquakes strong enough to cause damage may occur in any state... in the past forty years, earthquakes with a magnitude of 3.5 or greater have occurred in forty-two states"