The Christchurch earthquake ripped an 11 foot fault line. According to geologists the 7.1 temblor the shift the to the right . From the Sunday Mail (London,UK):
The quake was caused by the continuing collision between the Pacific and Australian tectonic plates, said Professor Mark Quigley, of Canterbury University.
‘One side of the Earth has lurched to the right … up to 11ft and in some places been thrust up,’ he said. ‘We went and saw two houses that were completely snapped in half by the earthquake.’
Building Codes are one of the reason there were no death and two people injured:
The fact that no one was killed was put down to the timing of the quake and strict building codes.
‘New Zealand has very good building codes which mean the buildings are strong compared with, say, Haiti,’ said Professor Martha Savage of Victoria University in the capital Wellington.
The Anglican Dean of Christchurch, the Rev Peter Beck, added: ‘Thank God for earthquake strengthening ten years ago.’
Prime Minister John Key said it was a miracle no one was killed. He put that down to the building codes and because the quake happened just before dawn on Saturday.