Felt it here too.
We’re trading on the 7th floor of a 12 or 14 floor office building near Schaumburg, and our chairs and monitors were swaying a bit around 4am.
I live in a western suburb of Chicago and it woke me up bigtime in my condo building. It shook the whole building. Literally felt like the building was shifting. Weirdest feeling. I knew almost immediately it had to be an earthquake, as nothing else would cause the whole building to rock like that. Jeez, I hope this isn’t a harbinger of things to come.