A wooden brace holding up a window of the Cramner Centre, formerly Christchurch Girls' High School. The masonry above the window has fallen away during the earthquake.
Royal New Zealand Air Force and New Zealand Army personnel check on rest home residents who are being evacuated from Christchurch after the 22 February 2011 earthquake.
NZ Army medics being briefed outside the PGC Building in Christchurch after the 22 February 2011 earthquake. In the background, the collapsed PGG Building can be seen.
Student Army leader Sam Johnston and Patsy Te Are lighting a flame to signify the presence of God at the Christchurch Earthquake Memorial Service in Hagley Park.
Suzie Ferguson, Mary Wilson and Hewitt Humphrey host rolling news coverage of the Christchurch Earthquake. The audio used comes from the start of the 6pm hour.
Financial markets have backtracked on expectations of an interest rate cut by the Reserve Bank in the wake of the Christchurch earthquake. Economics correspondent, Nigel Stirling, reports.
People caught up in February's earthquake in Christchurch want to know why a Royal Commission of inquiry isn't going to apportion any blame for building collapses.
The large aftershock rattled nerves in Christchurch last night but it was not the destructive earthquake that had been predicted by self-styled quake forecaster Ken Ring.
One of the most potent symbols of the earthquake has been the massive amount of destruction caused to Christchurch's Anglican Cathedral, including the toppling of its spire.
A debate on the architectural way forward for earthquake hit Christchurch ahead of an exhibition and series of talks initiated by the New Zealand Institute of Architects.
Some Christchurch schools are so worried about the impact of February's earthquake on their students that they want special consideration to be given in their exam marks.
The insurance industry says overseas insurers have become wary of New Zealand after Monday's earthquakes in Christchurch and higher premiums across the country are now almost inevitable.
Some children in Christchurch still have quite serious post-earthquake anxiety issues - we hear what to look for and why professional help might be a good idea.
Rest home residents strapped into a Royal New Zealand Air Force Hercules C-130. The residents were being evacuated from Christchurch after the 22 February 2011 earthquake.
A video of a residential area in Christchurch, recorded in December 2011. The video captures a 6.0 magnitude earthquake, and the liquefaction caused by this tremor.
A photograph of the earthquake damage to a house in Christchurch. The outer-side wall has crumbled, the bricks spilling onto the ground and buckling the fence.
In the two hours following the earthquake, the St John Ambulance service in Christchurch took more than 353 calls. That compares to just 250 calls it usually receives during a standard 24-hour period. St John's Ambulance operations director, Michael Brook, joins us from Christchurch.
Labour MPs say it's important party sticks to strategy, Man shot dead by police near Napier, Thousands attend Westminister Christchurch memorial, Twickenham packed for Crusaders vs Sharks match, Doubt in Christchurch new earthquake agency worthwhile, and Canterbury aged care firms want certainty; families want beds.
A close-up photograph of parts of the Townsend Telescope recovered from the rubble of the Observatory tower. The telescope was housed in the tower at the Christchurch Arts Centre. It was severely damaged when the tower collapsed during the 22 February 2011 earthquake.
A photograph of parts of the Townsend Telescope recovered from the rubble of the Observatory tower. The telescope was housed in the tower at the Christchurch Arts Centre. It was severely damaged when the tower collapsed during the 22 February 2011 earthquake.
Page 3 of Section A of the South Island edition of the Christchurch Press, published on Friday 12 August 2011.
Page 1 of Section A of the South Island edition of the Christchurch Press, published on Monday 18 July 2011.
This manuscript provides a critical examination of the ground motions recorded in the near-source region resulting from the 22 February 2011 Christchurch earthquake. Particular attention is given to reconciling the observed spatial distribution of ground motions in terms of physical phenomena related to source, path and site effects. The large number of near-source observed strong ground motions show clear evidence of: forward-directivity, basin generated surface waves, liquefaction and other significant nonlinear site response. The pseudo-acceleration response spectra (SA) amplitudes and significant duration of strong motions agree well with empirical prediction models, except at long vibration periods where the influence of basin-generated surface waves and nonlinear site response are significant and not adequately accounted for in empirical SA models. Pseudo-acceleration response spectra are also compared with those observed in the 4 September 2010 Darfield earthquake and routine design response spectra used in order to emphasise the amplitude of ground shaking and elucidate the importance of local geotechnical characteristics on surface ground motions. The characteristics of the observed vertical component accelerations are shown to be strongly dependent on source-to-site distance and are comparable with those from the 4 September 2010 Darfield earthquake, implying the large amplitudes observed are simply a result of many observations at close distances rather than a peculiar source effect.
A water tank outside a New World supermarket providing residents with clean water. The earthquake caused major damage to sewer pipes and pump stations in and around Christchurch.
Photos taken at Gap Filler fair on April 9 following the February 22 earthquake. www.gapfiller.org.nz/ File reference: CCL-2011-04-08-Addington-Gapfiller-003.jpg From the collection of Christchurch City Libraries
Photos taken at Gap Filler fair on April 9 following the February 22 earthquake. www.gapfiller.org.nz/ File reference: CCL-2011-04-08-Addington-Gapfiller-005.jpg From the collection of Christchurch City Libraries
Photos taken at Gap Filler fair on April 9 following the February 22 earthquake. www.gapfiller.org.nz/ File reference: CCL-2011-04-08-Addington-Gapfiller-007.jpg From the collection of Christchurch City Libraries
Photos taken in Lyttelton on April 20 showing the demolitions on London Street following the February 22 earthquake. File reference: CCL-2011-04-20-Lyttelton-Demolitions-P1120071 From the collection of Christchurch City Libraries
Photos taken at Gap Filler fair on April 9 following the February 22 earthquake. www.gapfiller.org.nz/ File reference: CCL-2011-04-08-Addington-Gapfiller-002.jpg From the collection of Christchurch City Libraries
Photos taken at Gap Filler fair on April 9 following the February 22 earthquake. www.gapfiller.org.nz/ File reference: CCL-2011-04-08-Addington-Gapfiller-004.jpg From the collection of Christchurch City Libraries