4:36am 18/04/08
Chicago experiences an earthquake. Minor by the standards of most other fault lines, but noteworthy. Enough to rattle a three story apartment complex for around half a minute.
We're all aware that Chicago has earthquakes with some frequency, all so minor they're inperceptible. More fun info here:
http://earthquake.usgs.gov/eqcenter/recenteqsus/Quakes/us2008qza6.php#details