Loving the Keep Calm T-shirt idea! You can do them on this website, got some other ones for my OH for our May holiday, the quality is really good - http://www.tshirt-town.com/girls/funny/ ... fAodBi0lZA (these are the girls ones, they do boys too).
On a serious note - is there a pattern emerging with these quakes? Are they the forerunners of a biggie on the way? I really do think if I'd still been there on Sunday that I would have jumped off my balcony, I was already there in the 2 second duration of the one before - from sleeping to ready to leap in record time!