Did the earth move for you? Well it did for us...at 6.30am. In Christchurch. First there was a low rumbling, then an all over vibration, all finished off with an eerie silence. The earthquake, not a big one fortunately, was centred just 30 kms from Christchurch, and measured 4.9 on the Richter scale. It was more than a little un-nerving though, makes you wonder just how terrifying a big one would be...