Quakes continue to rock New Zealand city of Christchurch
Earthquakes continued to rock Christchurch, the biggest city in New Zealand's South Island, Saturday following a massive 7.1- magnitude shake that flattened buildings, ripped up roads and cut power, water and sewage connections, dpa reported.
Seismologists downgraded the quake, which was centred 40 kilometres west of the city, after initially estimating it to be of 7.4-magnitude but said it remained one of the biggest to hit a population centre in one of the world's most earthquake-prone countries in the last century.
They said it caused extensive damage because it was centred only 10 kilometres underground. They revised an earlier estimate that it was 33 kilometres deep.
Ten sizeable aftershocks ranging from 3.9 to 5.2 on the Richter scale were recorded after the initial shake at 4.35 am.