So, how deep is North America? (Just going from memory on that depth ~ may even be 7 miles ~ but you have to remember the continents do not have an even depth ~ maybe you can look it up for us)
Not sure, I was trying to find out more on the Reelfoot Rift (being in Nashville, I'm close enough that damage would occur here - the "red" zone), but I can't seem to find any definitive depth info.