On talking to a lot of the locals where i stay in Kefalonia, tremors are a very regular occurance and as such they don't notice them. I think it's only when they get over about 3.5 that they begin to notice that they have occured.
I remember one day sitting in the Mythos bar in Poros chatting to Anna the waitress. quite casually she said "oh, an earthquake!" I thought she was having me on and she said "look at your glass"
I did and was surprised to see the surface of my drink rippling away!
She said "don't worry, that happens all the time and no one notices. That was my first experience of a quake but i have sat through several rather noisy ones since!!