An earthquake occurred in Christchurch, New Zealand on February 22, 2011 at 12:51 pm local time registering 6.3 on the Richter scale. The earthquake was centered 2 km west of Lyttelton and 10 km southeast of Christchurch, damaging buildings and infrastructure already weakened by the 2010 Canterbury earthquake and its aftershocks. A previous earthquake on September 4, 2010 was magnitude 7.1.