According to the Telegraph UK, as many as 100 specific faults have been identified around New Zealand, "some as close to 12 miles from central Christchurch, with modelling by the New Zealand Earthquake Commission indicating that a major seismic event could hit Christchurch once every 55 years." We'd recommend not reading Bill Bryson's book "A Short History of Nearly Everything," particularly the chapters on plate tectonics, before your next trip to NZ.
That said, Air New Zealand is lowering fares to help those who wish to get into or out of Christchurch from other parts of NZ:
Air New Zealand has reduced domestic airfares in and out of Christchurch to $50 for those who book before Friday. The discounted tickets will be available to anyone in New Zealand through the carrier's website and call centre. A return Auckland-Christchurch flight will also be available for $50 tomorrow, a statement says.
Air New Zealand CEO Rob Fyfe, who is in Christchurch, says Air New Zealand will regularly review capacity and compassionate fare requirements over the coming days. He has offered the full resources of the airline to Christchurch Mayor Bob Parker and Prime Minister John Key.
Our thoughts are with all of those in Christchurch today as they recover from the earthquake and continue to work to uncover those buried under rubble.