On Wednesday, I felt the first yellow box to the left near Fremont, CA - a 4.2 tremor centered between Fremont and San Jose, CA. It was INTERESTING! I was in a 3 story building and I totally felt the building creek and sway both during as well as 10 seconds or so after the earthquake stopped.
I was on the phone and literally stopped mid sentence and said "oh shit, we're having an earthquake!" The two ladies that I was with in the small conference room seemed to be very worried and said a couple of times "should we get in the doorways?"
Being from the midwest, the whole experience seemed very surreal. "Very Californian." My wife asked if I would ever want to be in a bigger one. My response: "If you're asking if I want to have a 3 story building collapse on my head....the answer is no."