New Zealand badly shaken by earthquake (update)

Christchurch in New Zealand is the scene of at least 65 deaths following a series of tremors around the city that began around noon Monday 21 February. Buildings have collapsed and emergency services are overwhelmed trying to dig out people trapped under rubble. The largest tremor appears to have hit at 12:51, magnitude 6.5 on the Richter scale, according to GeoNet, which records tremors, and 6.3 according to local measurements.

The cathedral has been badly damaged, according to local reports, and some buildings have collapsed. The largest tremor was centred 20 km southeast of the city, with several others 5-10km southeast of Christchurch.

The city suffered considerable damage in September 2010 from a 7.0 earthquake.

Links to other sites: Geonet, NZ Herald, Reuters

Links to videos: NZ Herald rocks tumble from Sumner cliff, NZ Herald/AP, city centre Christchurch raw footage

Aerial photos, NZ Herald