A bit before lunch we were both on our computers when I felt a slight rumble.  Yes, I was hungry but this was more of a vibration running through my legs.  We looked at each other:  “Did you feel that?” we both said simultaneously.  Then we felt it again.  A bit stronger this time.  An earthquake! And then, thankfully, all was still. Pretty funky to feel the house vibrate like that. Glad it was only a 3.5.