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Images for Christchurch; more images...

Images, UC QuakeStudies

Silver Award presented to Erin Jackson (from Christchurch), she acted as the Big Top manager during student volunteer army operations. Pictured here with Vice-Chancellor Dr Rod Carr, Prime Minister John Key and Minister for Canterbury Earthquake Recovery Gerry Brownlee.

Audio, Radio New Zealand

Since the February 22nd earthquake, an influx of displaced Christchurch residents have made North Canterbury their temporary home. Cosmo Kentish-Barnes finds out how some people have coped with this dramatic event and what locals are doing to support them.

Audio, Radio New Zealand

The Prime Minister prepares for the Christchurch Call Summit in Paris saying governments need to protect their citizens from radicalisation, Police investigate who sent a threatening letter to the Earthquake Commission, A powerful 7.5 magnitude quake strikes PNG overnight.

Videos, UC QuakeStudies

A video of Dr Ann McEwan, architectural historian and heritage consultant, talking about the architectural details and significance of heritage buildings in Christchurch. The video includes discussion of the Provincial Chambers buildings, the MedLab building, and Eliza's Manor.

Images, UC QuakeStudies

A damaged brick building has wooden bracing holding the walls together. The photographer comments, "This building came through the September Christchurch quake with a few band aid plasters, but the February quake means that she is now DNR (Do Not Resuscitate)".

Images, UC QuakeStudies

A concrete block wall with a large diagonal crack running through it. The photographer comments, "This wall has fascinated me. It has cracked across in a dead straight diagonal line during one of Christchurch's many earthquakes. How could this have occurred?".

Images, UC QuakeStudies

On the one year anniversary of the February 22nd, flowers were placed in road cones across Christchurch to remember the earthquake victims. These two cone are next to a road sign that says 'Footpath closed. Please use other site'.

Images, UC QuakeStudies

A photograph of a SPCA Wellington vehicle driving through the Christchurch central city after the 22 February 2011 earthquake. In the background, a group of shops has been damaged by the earthquakes. A portaloo can be seen to the left.

Videos, UC QuakeStudies

A video of members of the New Zealand Police and the New Zealand Army guarding cordons in the Christchurch central city after the 4 September 2010 earthquake. The video also includes footage of a helicopter flying over the central city.

Videos, UC QuakeStudies

A video of a protest against the Ministry of Education's proposed school closures and mergers in Christchurch. More than a thousand people marched from the CBS Arena to the Ministry of Education office on Princess Street as part of the protest.

Images, UC QuakeStudies

The front of Christ Church Cathedral showing its broken tower. Bracing has been placed on the front wall to limit further damage. Security fences have been placed around the cathedral to restrict access. The Wizard of Christchurch stands to the right.

Images, UC QuakeStudies

A view of the intersection of Hereford Street and Cambridge Terrace. The end gable of the Library Chambers has crumbled, and the area has been cordoned off with fencing and cones. In the background is the Christchurch City Council's Civic Offices.

Images, UC QuakeStudies

A large crack between the road and a concrete slab in New Brighton. The photographer comments, "This is the gap that has been growing during all the Christchurch earthquakes. It is between Robbie's Restaurant and the car park in New Brighton".

Audio, Radio New Zealand

Phil Holdstock, a homeowner; Leanne Curtis, relationships manager for the Canterbury Communities' Earthquake Recovery Network, a network of residents association and community group representatives from the earthquake-affected neighbourhoods of Canterbury; and Jeremy Johnson, insurance partner at Wynn Williams in Christchurch.

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.

Audio, Radio New Zealand

Jim Hay keeps ticking along in a career that's spanned more than 30 years. He's a watchmaker and although he'll be the first to tell you time's just about run out on wrist watches, his skills in clock repairs are in demand since the Christchurch earthquake.