In 1811 and 1812 three large earthquakes (Magnitude 7.7, 7.5, 7.7 ) hit the New Madrid area near what is now St. Louis, Mo and Memphis, TN
If those cities had their current population and infrastructure when those earthquakes occurred, hundreds of thousands of people might have been killed or injured. Should that region have essentially the same types of building codes and rules that exist in California and Japan today despite the fact that there have not been any large earthquakes in the area since 1812 and it is not located near a plate boundary?
They probably should have the building codes and rules that exist in California even though an earthquake in Missouri is less likely than one in California. There are numerous small earthquakes in the New Madrid region and the size of the current population justifies taking reasonable steps to avoid a major disaster. The cost of the potential disaster is probably much greater than the cost of enforcing building codes.
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