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Originally Posted by Steely Dan
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This map is really interesting. Everyone knows about earthquake risk in California and the PNW, but the red zones near St. Louis/Memphis and Charleston would surprise most people, I think. I know of the huge New Madrid quake from the early 1900s (I think?), but just found out recently on a historic tour of Charleston, that the city has been heavily damaged by earthquakes several times in its existence. It seems random when you look at the low risk zones everywhere around it. Same with the New Madrid fault. What makes those small areas so susceptible? They seem more like micro-faults than the continental plate collision on the west coast.