An Earthquake Felt in Detroit!

I was at my Mom's today and we were watching a TV program when I felt the chair I was sitting in sway a little. At first I thought it was just me or maybe the building always swayed on the 3 rd flour. I even adjusted my position to see if it would stop. Later they announced that there had been a 5.5 earthquake 38 miles north of Ottawa felt in Detroit. Mom says "I felt it." But she thought it was just her and didn't want to say anything about it for fear I would think she was ill. When I got home I told Hubby. He said he had been lying down (checking his eyelids for cracks) when he thought the cat had jumped up on the bed but it hadn't. He didn't know there had been a quake. That was the first one for either of us.