A car stands in water on Ferry Road after two magnitude 6.0 and 5.5 earthquakes struck on June 13, 2011 in Christchurch, New Zealand. The aftershocks have followed four months after the major eathquake which hit the city on February 22, 2011 resulting in the deaths of 181 people. (Photo by Martin Hunter/Getty Images)

The remains of a damaged house at Shag Rock near Sumner after the cliff fell away during two magnitude 6.0 and 5.5 earthquakes struck on June 13, 2011 in Christchurch, New Zealand. (Photo by Martin Hunter/Getty Images)

A vehicle drives through water on Ferry Road near Sumner after two earthquakes, a magnitude 6.0 and 5.5, struck on June 13, 2011 in Christchurch, New Zealand. (Photo by Martin Hunter/Getty Images)

The remains of a damaged house at Shag Rock near Sumner after the cliff fell away during two magnitude 6.0 and 5.5 earthquakes struck on June 13, 2011 in Christchurch, New Zealand. (Photo by Martin Hunter/Getty Images)

Elizabeth Parsons,73, of Shirley clean's up liquefaction the day after two magnitude 6.0 and 5.5 earthquakes struck the region on June 14, 2011 in Christchurch, New Zealand. (Photo by Martin Hunter/Getty Images)