In Hyannis at the time, probably eating supper; and completely oblivious. Two Irish lady visitors saw the "Breaking News" on the TV and promptly revised their plan to visit Maine "in case of aftershocks"!
They seemed to have calmed down a couple of days later and accepted my copy of the Downeaster timetable.
I tried to tell them that 4.2 wasn't that strong, and that when we had the 5.2 here, some people slept through it (depending on how their home was built).
Had a couple of 4. somethings here and it depends on the distance and depth whether it is a bang or a wave motion.
Irene in Derby, UK