Man, I miss all the cool stuff that happens in Chicago! Via the Chicago Sun Times:
A 3.8 magnitude earthquake rattled the western suburbs early this morning. There were no reports of damage after the 3:59 a.m. quake, centered about 6 miles west of Elgin.
The U.S. Geological Survey originally estimated the quake at a magnitude of 4.3 and centered a few miles further west, but recalculated the quake after more information came in, according to USGS earthquake analyst Don Blakeman.
I’ll have to check with my family to see if they felt it, as the epicenter was less than 10 miles from them.
Skulls in the Stars 
Looks like USGS was surprised by this one and they’ll be mapping a new fault system in that area.
http://thedailybite.wordpress.com/2010/02/10/geologists-caught-off-guard-by-earthquake-near-chicago/
Thanks for the link! It’s a good reminder, I guess, that the entire earth is geologically active — even areas that seem quiet will not necessarily stay that way.