I've slept through one before as well.

Then again, of the 4 I've been around for in Ontario, they were all fairly small. (One I was in a car, and was mad when I found out I missed it - the suspension just soaked it up. I had gone to to pick up some fast food for a bunch of people and they were all excited when I got back - "did you feel that!!?". Nope!)

I was woken up once by one, but I was on the 21st floor of an apartment, and the building got swaying pretty good.