January 19th, 2010.
Given all the seismic fault lines in the United States (Ramapo, New Madrid, San Andreas, etc.), all buildings should be built in accordance with earthquake building codes, regardless of the building's location. Given the cost to do anything in the modern world, there is no excuse for any portion of the U.S. not to build in accordance with the generally accepted earthquake building safety standards.
I would suggest not buying any house or structure that is not built in accordance with these earthquake building codes - if such a purchase choice was an option.
AVT / Adam Trotter