We had a floor joist in the 2nd floor crack once when I was a kid in Ohio.
I thought it was because there were like 35 people upstairs and some jack ass cut through the 16 “ floor joist during construction to let a water pipe through, which weakened it.
My brother tells me now it was a 3.5 quake.
Pop blamed it on me saying that I had set a rocket off downstairs! LOL
I did, but that, weren’t the problem. I swear it!