Fri
Apr
18
5.2 earthquake rocks large area of Midwest; no major damage - Yahoo! News
This explains it! I went to sleep only at around 4 am and was violently woken up just minutes later. I moved away from my window and wanted to run down to the open yard, but was too shocked to do anything. I could hear things moving all around me. A very scary experience all in all. Even this morning, around 10 am, there was a slight tremor. I hope everybody is fine. The entire Midwest felt this tremor, it seems.