I likewise heard a loud boom around that time. It was like deep heavy thump as if some dropped a twenty ton bag of sand from 20 feet up. As I live by a hill with a sharp blind curve where speeding drivers have lost it, that my first thought. It didn't occur to me that the quake could be the cause until I heard others mention a boom. I felt a Lake Eire quake, I believe it was a 5, in 70's or 80's. It had the more typical feeling of a heaving truck rumbling down the street.