This is a very interesting study.

here are some more info from "formal" sites (and two youtube links you may want to watch)


Earthquake Booms, Seneca Guns, and Other Sounds
[link to earthquake.usgs.gov]


the Meeman-Shelby Fault (NE-SW and is located very close to Memphis)
[link to www.memphis.edu]

New Madrid Seismic Zone graphics, illustrations, diagrams
Natural gas pipelines & NMSZ
[link to www.showme.net]


Youtube videos

"The Ground Just Lifted Into The Air...." (upper michigan)
maybe not relevant but you never know
[link to www.youtube.com]

Earthquake Fault Lines in America - ABC News
(this one from 2010 but it is very informative
[link to www.youtube.com]