An earthquake measuring 6.3 magnitude rocked the second largest city in New Zealand, Christchurch this day. According to the U.S. Geological Survey, the quake occurred at 2011/02/21 23:51:43 local time, or Monday (2/21/2011) GMT at a depth of only 4 km (2.3 miles). With a depth of only 4 km I think the shocks that occurred very hard and able to knock down buildings. The quake was centered about 10 km southwest of Christchurch, which has suffered damage from an earthquake measuring 7.1 last September. Television reporter reported among the ruins of the cathedral church which had been shattered into pieces of stone. As a result of this earthquake electricity and water has been disconnected. There are a lot of damage, there were large cracks in the house, also collapsed brick fence. New Zealand is a country located between the Pacific and Indo-Australian tectonic plates, the record average of more than 14,000 earthquakes a year, of which about 20 are usually over 5.0 magnitude. ABC News