I live in Milan and I woke up a little after 4 as a long (and quite strong) shake occurred. As I was sleeping I probably didn’t feel it all, but it was the strongest I’ve ever felt. Despite being very sleepy, I realised there were going to be more shakes, and indeed some minutes after a shorter and less powerful one happened. I then went back to sleep and I think there was another, smaller one some time after.
I heard that damages include old buildings near the epicentre, so I don’t think the Mugello or Fiorano circuits should be damaged.