Christchurch earthquake: Update - Third aftershock even bigger

Buildings have been evacuated and at least two people rescued from a collapsed church as Christchurch was rocked by a number of aftershocks, the largest measuring 6.0 in magnitude.
Further big aftershocks continue to rock the city, as reports flow in of further building collapses and building damage.
Police said St John's Church in central Christchurch had collapsed trapping two people, who had been rescued.
Ambulance service St John took six people to hospital with moderately serious injuries, St John Regional Operations Manager Chris Haines said.
Those injuries were as a result of falling building material.
The 6.0 tremor -- the biggest -- hit about 2.20pm, centred 10km southeast of Christchurch at a depth of 9km.
Around 1pm a large quake measuring 5.5 and centred 10km southeast of Christchurch at a depth of 11km shook the city. Around half an hour later there was a tremor which measured 4.4 and centred in the same place and at the same depth.
The February 22 quake which killed 181 people was a 6.3 magnitude.
Attendees at the second inquest hearings for Christchurch earthquake victims were so upset when the 6.0 tremor struck, that the hearing was abandoned for the day about 2.30pm.
"The families were just devastated and went home," Vicky Cran told NZPA.
After the first tremor, attendees bolted outside and gathered in the racecourse parade ring, a spokesman for Coroner Gordon Matenga told NZPA.
"It all cleared very quickly," Steve Corbett said. "Locals showed the way, they didn't muck around."
The first inquest into the quake last month was also hit by an aftershock but today's was "certainly longer", he said.
The inquest was looking into the deaths of 106 people when Christchurch's CTV building collapsed and caught fire after February 22's devastating quake.
Christchurch police reported a building collapsed on the corner of Stanmore Rd and Worcester St, but the building was reported to be clear of people.
A small fire broke out at a building in Edgeware Road, which had now been controlled and the building was clear.
Liquefaction had been reported at a number of locations, police said.
Flooding has been reported at areas including Avonside and around New Brighton Bridge, while roads closed included Waygreen Avenue, New Brighton Bridge and Anzac Drive Bridge.
Buildings evacuated included Canterbury University, Westfield Riccarton Mall and Pak'n Save supermarket in Wainoni.
Phone lines were overloaded.
Telecom said it was working on finding out which services had been affected.
While both fixed and mobile networks were operating they were experiencing some congestion, and mains power loss may be affecting some parts of the network, Telecom said.
Mobile customers have been asked to use text messages in place of calls where possible, as call volumes remain high, Telecom said.
Vodafone reported congestion on its mobile network but said it was still operating.
Power has been cut to approximately 10,000 customers in the east of Christchurch ranging from Heathcote to Brooklands including Bromley, Belfast and Marshlands following the big aftershock, energy company Orion said.
Power was also lost for a short time from the Dallington zone substation affecting people in the Dallington and Avonside areas. Power from the Dallington substation had now been restored.
Orion expected most power would be restored by nightfall.
Lyttelton Tunnel closed briefly, but has reopened.
The Fire Service rescued of two people from the collapsed St John's Church building in Hereford Street .
It was also responding to reports of liquefaction, flooding, power lines down, falling debris, and burst sewer and water pipes.
The Christchurch Urban Search and Rescue team has been deployed.
The NZ dollar dropped in value as the tremors hit with rate against the US dollar falling to a low of US81.39c from around US82.15c level before the series of quakes.