Strong Earthquakes Rattle New Zealand's Christchurch

23 December 2011

WELLINGTON, New Zealand - A series of strong earthquakes struck the New Zealand city of Christchurch on Friday, rattling buildings, sending goods tumbling from shelves and prompting terrified holiday shoppers to flee into the streets. There was no tsunami alert issued and the city appeared to have been spared major damage.

The first 5.8-magnitude quake struck Friday afternoon, 16 miles (26 kilometers) north of Christchurch and 2.5 miles (4 kilometers) deep, the U.S. Geological Survey said. Minutes later, a 5.3-magnitude aftershock hit. About an hour after that, the city was shaken by another 5.8-magnitude temblor, the U.S.G.S. said, though New Zealand's geological agency GNS Science recorded that aftershock as a magnitude-6.0. Both aftershocks were less than 3 miles (5 kilometers) deep.

The Pacific Tsunami Warning Center did not issue an alert.

The city's airport was evacuated after the first quake and all city malls shut down as a precaution.

Warwick Isaacs, demolitions manager for the Canterbury Earthquake Recovery Authority, said most buildings had been evacuated "as an emergency measure." The area has recorded more than 7,000 earthquakes since a magnitude-7.0 quake rocked the city on Sept. 4, 2010. That quake did not cause any deaths.

Rock falls had occurred in one area and there was liquefaction — when an earthquake forces underground water up through loose soil — in several places, Isaacs told New Zealand's National Radio.