My three kids were in the house and came out to tell me the whole thing shook for a bit. I did not notice anything myself, but looking back it is possible the horse we were working on misbehaved slightly for no apparent reason at the appropriate time.
(We are in Ontario, Canada, just off the northern shore of Lake Erie, roughly an hour from Buffalo NY)
Didn't notice anything here, about four hours further north. Not that I would have noticed. We had a little quake here a couple of years ago, and I didn't even think about it. We have freight trains going by every day that shake the ground almost as much, and there was a fair bit of rock blasting going on. It seemed perfectly normal.