Actually, I was sitting in my recliner when it started rocking and rolling about 2 weeks ago. I live in a western suburb of Chicago very near to Hinsdale (Downers Grove). It’s a creepy feeling, as the recliner, with me upon it, started undulating, kind of a small roll, back and forth, and lasted for about 5 seconds, in my estimation. I knew in my bones that it was probaby an earthquake, as many years ago, the same phenomenon happened when I was living in Champaign-Urbana in the middle of the state of IL where UIUC is located. It was the that same rocking feeling I experienced as when it happened in Champaign-Urbana.
When they said it was a quarry blast that caused it, I was very skeptical, as that has never happened before where a blast caused ground upheaval, and the quarry isn’t that close to me, plus it was too widespread to be caused by a blast. Quite the experience on an otherwise dull day.
The real fun ones are the BIG jolt, followed by the rocking motion. Ya learn to wait to see if that motion is gonna get worse or taper off. The special ones are when ya think a locomotive is headed right for ya before the rocking and rolling starts. Good times...good times. :-)