I felt this in Las Vegas on the 12th floor of the hotel/casino where my office is located. It was a rolling motion -- very slight -- the kind of motion that fools with your equilibrium -- would never have felt it had I been standing. I was at my computer and immediately went to the USGS website which I have bookmarked, but it took a minute or two for the quake to be shown.

Nothing rattled in my office. However, my one office wall abuts to the parking structure and I could hear a lot of creaking going on in that wall, i.e. the parking structure.

Barbara