None of the people in my ground-floor office in Allston (a neighborhood in Boston) felt any tremors. However, my girlfriend's office in the Cambridgeport neighborhood of Cambridge shook, and was evacuated for about 20-30 minutes.
I'm down on the Fort Point Channel (landfill) and we were shaking pretty good up on the ninth floor.
(Yes, I reported to USGS)
In the 3rd floor of a ~20 floor Boston office building I felt two mild tremors around 1:55pm, maybe 10 seconds each with a 10-second pause in between.
I also reported to the USGS. I'm on the 14th floor of a building in Kendall Sq (Cambridge) and we shook for probably 45 seconds.
I thought I was sick until all my coworkers started complaining.
On the 10th floor in longwood area. Felt quite a bit of movement. No damage from what I can see.