I felt it on the 4th floor in Sunnyvale, CA, between San Jose and San Francisco. Wasn't jarring, just kind of like a rolling feeling. I felt dizzy for a bit and saw the overhead lights swaying. My coworkers in the next cube didn't even notice it.

Pardon me, but I like my natural disasters to be a surprise. I'd hate to be in hurricane/tornado areas where you're just waiting for it to show up. But hey, that's just me...