A seismic engineer says many of the Christchurch buildings destroyed in Tuesday's quake weren't designed to cope with such intense forces - and it's possible damage from the September 4th earthquake went undetected.
The first of Christchurch's high-rise buildings to close after the February earthquake has reopened. All the tenants of the12-storey HSBC Tower are now back in the building which has been extensively checked by engineering experts.
The mayor of Christchurch is urging owners of heritage buildings damaged in the earthquake, not to tear down the city's treasures without first considering if they can be saved.
The Christchurch City Council has voted to fast track the demolition of two heritage buildings that it says were severely damaged in September's earthquake and pose an immediate danger to people's safety.
Pyne Gould building tenants in Christchurch have told the Royal Commission of Inquiry into the Canterbury Earthquakes hearing they didn't feel safe there after the September quake.
The smaller buildings that collapsed in the Christchurch earthquake, killing those in them as well as passers by, will be the focus of the Canterbury Earthquakes Royal Commission when hearings resume today
A photograph of earthquake-damaged buildings along Manchester Street near Struthers Lane. The front of the buildings have crumbled, the bricks falling onto the footpath in front, damaging the awnings.
Photograph captioned by BeckerFraserPhotos, "Isaac House (aka National Bank) on the corner of Armagh and Colombo Streets".
Photograph captioned by BeckerFraserPhotos, "CBD with PricewaterhouseCoopers building in the foreground".
A scanned copy of page 7 of an issue of Canta published in 1976. The page features the floor plan of the Students' Association building.
The Asko Design store on Victoria Street has been given a yellow sticker. This was a building assessment system used following the February earthquake and indicates that this building has limited access and needs further evaluation.
A photograph of the Liberty Books building on Manchester Street taken shortly after the 22 February 2011 earthquake. The building's second storey walls and awnings have collapsed on to the street.
An entry from Ruth Gardner's blog for 26 February 2011 entitled, "Shaken City".
The front quad of Christ's College with the school buildings all around. Part of the awning of the building in front has crumbled, and there is also damage to the gable above.
A digger clearing building rubble from demolished buildings on the corner of London Street in Lyttelton. Fabric hearts have been attached to the fence in front.
Building rubble and liquefaction on the footpath outside the former Public Library on the corner of Hereford Street and Cambridge Terrace.
Damage to the former Sumner Borough Council building. The brickwork is badly cracked, and parts of the wall have collapsed, exposing the interior. Shipping containers below the building protect the street from falling masonry.
A digger works on top of a pile of soil and building rubble.
Photo of the demolition of Aoraki Building taken by John Glennie, 14th of January 2012.
Photo of the demolition of Aoraki Building taken by John Glennie, 14th of January 2012.
Photo of the demolition of Aoraki Building taken by John Glennie, 14th of January 2012.
A photograph of a damaged building on the corner of Madras Street and Lichfield Street. Wire fences surround the building and Lichfield Street has also been closed off.
Photo of the demolition of Aoraki Building taken by John Glennie, 14th of January 2012.
Photograph captioned by BeckerFraserPhotos, "The construction of this window frame at Cranmer Court is clearly seen when the exterior stone has collapsed in the earthquake".
Photograph captioned by BeckerFraserPhotos, "Establishment apartment building on the corner of Peterborough Street and Victoria Street being demolished".
Photograph captioned by BeckerFraserPhotos, "Demolition of SBS Building, corner of Manchester and Worcester Streets. 172-178 Manchester Street demolition completed".
Detail of damage to the Hotel Grand Chancellor, showing how the building has crushed against the car park structure beside it.
A photograph captioned by BeckerFraserPhotos, "The Provincial Council Chambers on Durham Street. Materials from the building have been salvaged and placed on pallets outside".
Photograph captioned by BeckerFraserPhotos, "The stairs from the Forsyth Barr building on the ground behind 750 Colombo Street".
People walk past a damaged building on the corner of Edgeware Road and Barbadoes Street. Parts of the brick facade have collapsed, and the building is cordoned off with road cones and police tape.