I've been through about a dozen, in Seattle, Mtn. View, CA, and Portland. It's amazing how it can screw up your inner ear for the next hour or two. Even though the quake is long gone, I've experienced 'sea-legs' for awhile afterward. One fairly large one I was on the 3rd floor of the OLDEST (100 yrs) building on my college campus. The worst was in CA - not so large, but it lasted about 20-30 seconds. Usually the experience is, "Wow, I think we just had an earthquake!" That time it was, "Hey, Jim, is that an earthquake?" "Yeah, it sure is." "It's still going, isn't it?" "Yeah." "How long is this going to keep going . . . " "Finally, I think it's over . . . " The only thing worse than feeling the earthquake in the first place is having the time to think about it, while it's still happening.
I visited my son in Mtn. View about 3 days after the big S.F. quake. He was sick from acute appendicitis, and thought he was dizzy from nausea. Then he looked at the aquarium and saw the water sloshing back and forth, and realized that nausea does not cause that. I took a picture of a car that was parked beneath a roof with a brick chimney -- it looked like a convertible. Lucky no one was in at the time.
iggy