Scientists say Midwest quakes poorly understood
http://www.physorg.com/news127823426.html
Actually, we get earthquakes in Texas too, just not significant ones:
In historical times no earthquake with magnitude larger than about 6 has occurred in Texas. However, seismographs near El Paso record small earthquakes with magnitude of 2 or smaller every few days. Nearly every year earthquakes large enough to be felt by ordinary citizens occur somewhere in Texas.
EARTHQUAKE FAQ: TEXAS EARTHQUAKES
In fact, we had one earlier this month:
Magnitude 3.9 SOUTHERN TEXAS Monday, April 07, 2008 at 09:51:13 UTC