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Images, UC QuakeStudies

A photograph of trailers and trucks stacked with salvaged items from people's homes leaving the central business district. The photograph was taken during the Residential Access Project which gave residents temporary access within the red-zone cordon in order to retrieve items from their homes.

Audio, Radio New Zealand

It's been revealed that not a single one of New Zealand's 315 police buildings constructed before 2011 have had a full earthquake safety check. Canterbury's district health buildings and a central Wellington cinema are among other major structures needing checks. Phil Pennington joins us with the details.

Audio, Radio New Zealand

The historic home of New Zealand's most popular beer has been secured with a forty-million dollar upgrade. The Prime Minister John Key yesterday officially opened the redeveloped Speight's Brewery in central Dunedin, which has taken over the Lion company's South Island production because of the Christchurch earthquakes.

Images, UC QuakeStudies

A photograph of stencilled words on a footpath on Peterborough Street. The words read, "On Peterborough Street the houses are wonky. The ground has been pulled out from underneath them. The trick worked and the houses stayed up, but they are wonky. If you lived in them you might become wonky too".

Images, UC QuakeStudies

A photograph of the Domo furniture store, White’s Building and the Edison Building on Tuam Street shortly after the 22 February 2011 earthquake. Members of the public can be seen walking down the road as they attempt to leave the central city.

Videos, UC QuakeStudies

A time-lapse video of several locations in the Christchurch central city. The locations include the intersection of Gloucester and Manchester Streets, the intersection of Colombo and Armagh Streets, the ChristChurch Cathedral, Cashel Street, and the intersection of Lichfield and Manchester Streets.

Videos, UC QuakeStudies

A video of a tour of the Christchurch central city Red Zone. The video includes footage of Cambridge Terrace, Kilmore Street, Colombo Street, the Grant Thornton building in Cathedral Square, Worcester Street, ChristChurch Cathedral, the Westende Jewellers Building, and Hereford Street.

Images, eqnz.chch.2010

Christchurch's old central city police station building will now be demolished on Sunday by implosion. Another one of Christchurch recognisable buildings to be given a death sentence following the earthquakes of 2010/2011. Photo by Geoff Trotter at www.dreamdreams.co.nz

Research papers, Victoria University of Wellington

The last seven years have seen southern New Zealand a ected by several large and damaging earthquakes: the moment magnitude (MW) 7.8 Dusky Sound earthquake on 15 July 2009, the MW 7.1 Dar eld (Canterbury) earthquake on 4 September 2010, and most notably the MW 6.2 Christchurch earthquake on 22 February 2011 and the protracted aftershock sequence. In this thesis, we address the postseismic displacement produced by these earthquakes using methods of satellite-based geodetic measurement, known as Interferometric Synthetic Aperture Radar (InSAR) and Global Positioning System (GPS), and computational modelling.  We observe several ground displacement features in the Canterbury and Fiordland regions during three periods: 1) Following the Dusky Sound earthquake; 2) Following the Dar eld earthquake and prior to the Christchurch earthquake; and 3) Following the Christchurch earthquake until February 2015.  The ground displacement associated with postseismic motion following the Dusky Sound earthquake has been measured by continuous and campaign GPS data acquired in August 2009, in conjunction with Di erential Interferometric Synthetic Aperture Radar (DInSAR) observations. We use an afterslip model, estimated by temporal inversion of geodetic data, with combined viscoelastic rebound model to account for the observed spatio-temporal patterns of displacement. The two postseismic processes together induce a signi cant displacement corresponding to principal extensional and contractual strain rates of the order of 10⁻⁷ and 10⁻⁸ yr⁻¹ respectively, across most of the southern South Island.  We also analyse observed postseismic displacement following the Dusky Sound earthquake using a new inversion approach in order to describe afterslip in an elasticviscoelastic medium. We develop a mathematical framework, namely the "Iterative Decoupling of Afterslip and Viscoelastic rebound (IDAV)" method, with which to invert temporally dense and spatially sparse geodetic observations. We examine the IDAV method using both numerical and analytical simulations of Green's functions.  For the post-Dar eld time interval, postseismic signals are measured within approximately one month of the mainshock. The dataset used for the post-Dar eld displacement spans the region surrounding previously unrecognised faults that ruptured during the mainshock. Poroelastic rebound in a multi-layered half-space and dilatancy recovery at shallow depths provide a satisfactory t with the observations.  For the post-Christchurch interval, campaign GPS data acquired in February 2012 to February 2015 in four successive epochs and 66 TerraSAR-X (TSX) SAR acquisitions in descending orbits between March 2011 and May 2014 reveal approximately three years of postseismic displacement. We detect movement away from the satellite of ~ 3 mm/yr in Christchurch and a gradient of displacement of ~ 4 mm/yr across a lineament extending from the westernmost end of the Western Christchurch Fault towards the eastern end of the Greendale East Fault. The postseismic signals following the Christchurch earthquake are mainly accounted for by afterslip models on the subsurface lineament and nearby faults.

Videos, UC QuakeStudies

A video of a tour through the Christchurch central city Red Zone. The video includes footage of the Hotel Grand Chancellor, Victoria Square, the Forsyth Barr building, Colombo Street, Gloucester Street, Cathedral Square, the BNZ building, Cashel Mall, and the Kathmandu store on High Street.

Videos, UC QuakeStudies

A video of journalist Charlie Gates introducing the 2014 World Buskers Festival. Gates visits former festival venues in the Christchurch central city and the new performance venues for the 2014 festival, to show how the city has changed since the 2010 and 2011 earthquakes.

Images, eqnz.chch.2010

This is the Summit Road below Mt Cavendish and shows a few remaining high buildings in the central city beyond (in setting sun). Just above centre is the doomed AMI Stadium (1) aka Lancaster Park, home to Canterbury cricket and rugby till the erathquakes.

Videos, UC QuakeStudies

Part 1 of a video contributed by Henry Allison, a participant in the Understanding Place research project. The video has the description "Henry Allison talks about his experiences at the brewery on St Asaph Street during the earthquakes, and about the architecture that was lost in the central city".