Earthquake!

Update at 6 a.m.: Here's who felt the quake:
I've experienced it all. I just woke up (4:35ish) to my bed shaking, thinking Rachel was kicking or moving around. Then I realized, no, the whole building is shaking. Here's the data, according to the U.S. Geological Survey:

Earthquake Details

Magnitude	5.4 (Preliminary magnitude — subject to revision)
Date-Time	Friday, April 18, 2008 at 09:36:57 UTC Friday, April 18, 2008 at 04:36:57 AM at epicenter
Location	38.501°N, 87.898°W
Depth	10 km (6.2 miles) set by location program
Region	ILLINOIS
Distances	10 km (6 miles) ESE (103°) from West Salem, IL 10 km (6 miles) NE (55°) from Bone Gap, IL 13 km (8 miles) N (4°) from Bellmont, IL 39 km (24 miles) WSW (239°) from Vincennes, IN 66 km (41 miles) NNW (333°) from Evansville, IN 204 km (127 miles) E (93°) from St. Louis, MO
Location Uncertainty	Error estimate not available
Parameters	NST=021, Nph=021, Dmin=263.2 km, Rmss=1.07 sec, Gp=119°, M-type=moment magnitude (Mw), Version=1
Source	West Coast and Alaska Tsunami Warning Center/NOAA/NWS
Event ID	at00851141