I know this is off the Utah earthquake topic, but top of mind for me. Recently moved to Charleston. Never knew the earthquake threat specifically there. See this map:
http://earthquake.usgs.gov/hazards/products/conterminous/2008/maps/graphic2pct50.jpg
BTW, it turns out that the big ones hit Charleston on average every 1,500 years or so. They had one a couple hundred years ago. So we should be OK, but included to be safe. I do see some red/pink on the Wasatch front on that map . . .