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Other, National Library of New Zealand

Christchurch City Council website on the infrastructure rebuild of Christchurch following the 2010 and 2011 earthquakes. Includes news; information on SMART building; projects related to rebuilding of facilities, transport, suburban centres and the central city.

Other, National Library of New Zealand

After the shock and dust settled from the earthquakes, two friends, Helen Solomons and Wendy Riley, felt so strongly over the loss of the city's historic heart, they decided to put their skills to use and create this living tribute to it on the web.

Research papers, University of Canterbury Library

On February 22, 2011, a magnitude Mw 6.2 earthquake affected the Canterbury region, New Zealand, resulting in many fatalities. Liquefaction occurred across many areas, visible on the surface as ‘‘sand volcanoes’’, blisters and subsidence, causing significant damage to buildings, land and infrastructure. Liquefaction occurred at a number of sites across the Christchurch Boys High School sports grounds; one area in particular contained a piston ground failure and an adjacent silt volcano. Here, as part of a class project, we apply near-surface geophysics to image these two liquefaction features and determine whether they share a subsurface connection. Hand auger results enable correlation of the geophysical responses with the subsurface stratigraphy. The survey results suggest that there is a subsurface link, likely via a paleo-stream channel. The anomalous responses of the horizontal loop electromagnetic survey and electrical resistivity imaging highlight the disruption of the subsurface electrical properties beneath and between the two liquefaction features. The vertical magnetic gradient may also show a subtle anomalous response in this area, however the results are inconclusive. The ground penetrating radar survey shows disruption of the subsurface stratigraphy beneath the liquefaction features, in particular sediment mounding beneath the silt ejection (‘‘silt volcano’’) and stratigraphic disruption beneath the piston failure. The results indicate how near-surface geophysics allow the characteristics of liquefaction in the subsurface to be better understood, which could aid remediation work following liquefaction-induced land damage and guide interpretation of geophysical surveys of paleoliquefaction features.

Research papers, University of Canterbury Library

The Civil Defense understanding of the role of radio in disaster tends to focus on its value in providing essential information during and after the event. However this role is compromised when a station’s premises are destroyed, or rendered inaccessible by official cordons. The Radio Quake study examines how radio stations in Christchurch managed to resume broadcasting in the aftermath of the earthquake of February 22, 2011. In New Zealand’s heavily networked and commercialised radio environment there is a significant disparity between networked and independent stations’ broadcast commitments and resourcing. All Christchurch radio broadcasters were forced to improvise new locations, complex technical workarounds, and responsive styles of broadcasting after the February 22 earthquake, but the need to restore, or maintain, a full on air presence after the earthquake, rested entirely on often financially tenuous, locally owned and staffed independent radio: student, Iwi, community access, and local commercial stations. This paper will explore the resourcefulness and resilience of broadcasters riding out the aftershocks in hotels, motels, bedrooms, and a horse truck, using digital technologies in new ways to reimagine the practice of radio in Christchurch.

Research papers, University of Canterbury Library

This report presents an overview of the soil profile characteristics at a number of strong motion station (SMS) sites in Christchurch and its surrounds. An extensive database of ground motion records has been captured by the SMS network in the Canterbury region during the Canterbury earthquake sequence. However in order to comprehensively understand the ground motions recorded at these sites and to be able to relate these motions to other locations, a detailed understanding of the shallow geotechnical profile at each SMS is required. The original NZS1170.5 (SNZ 2004) site subsoil classifications for each SMS site is based on regional geological information and well logs located at varying distances from the site. Given the variability of Christchurch soils, more detailed investigations are required in close vicinity to each SMS to better understand stratigraphy and soil properties, which are important in seismic site response. In this regard, CPT, SPT and borehole data, shear wave velocity (Vs) profiles, and horizontal to vertical spectral ratio measurements (H/V) in close vicinity to the SMS were used to develop representative soil profiles at each site. NZS1170.5 (SNZ 2004) site subsoil classifications were updated using Vs and SPT N60 criteria. Site class E boundaries were treated as a sliding scale rather than as a discrete boundary to account for locations with similar site effects potential, an approach which was shown to result in a better delineation between the site classes. SPT N60 values often indicate a stiffer site class than the Vs data for softer soil sites, highlighting the disparity between the two site investigation techniques. Both SPT N60 and Vs based site classes did not always agree with the original site classifications. This emphasises the importance of having detailed site‐specific information at SMS locations in order to properly classify them. Furthermore, additional studies are required to harmonize site classification based on SPT N60 and Vs. Liquefaction triggering assessments were carried out for the Darfield and Christchurch earthquakes, and compared against observed liquefaction surface manifestations and ground motions characteristics at each SMS. In general, the characteristics of the recorded ground motions at each site correlate well with the triggering analyses. However, at sites that likely liquefied at depth (as indicated by triggering analyses and/or inferred from the characteristics of the recorded surface acceleration time series), the presence of a non‐liquefiable crust layer at many of the SMS locations prevented the manifestation of any surface effects.

Images, Alexander Turnbull Library

A small house is shown on an enormous foundation block labelled 'Rate$'. The cartoonist's comment is 'Like for like for the house...Total dislike for the foundation!' In Christchurch there were prospects of large rises in householders' rate to help finance the Christchurch Rebuild project. In view of the damage to housing, rate increases may be badly disproportionate. Quantity: 1 digital cartoon(s).

Images, Alexander Turnbull Library

Passengers use the baggage carousel at the Christchurch Airport to sleep on as they are swept around. 'Such a unique concept... a revolving motel!' Shortage of accommodation in Christchurch, because of earthquake-damaged hotels and motels and workers coming in for the Rebuild, was a serious problem for travellers to Christchurch, leading many to sleep in the airport overnight. Quantity: 1 digital cartoon(s).

Images, Alexander Turnbull Library

Orana Wildlife Park 'lodge' sleeps passengers from Christchurch airport with no accommodation and who would otherwise sleep at the terminal. The Park staff think that 'they get free accommodation and we have a new paying exhibit!' They have also put up a notice: 'Cheapskates - Do not feed'. Is this a solution to airport 'night kippers'? The shortage of accommodation in Christchurch due to earthquake damage led many air travellers to sleep overnight at the air terminal. Quantity: 1 digital cartoon(s).

Images, Alexander Turnbull Library

Depicts National MP Aaron Gilmore walking off carrying two suitcases. A row of Christchurch insurance men are calling for him to return and saying they have the right job for his talents. Refers to Gilmore's resignation after National Party censure following to his drunken bullying behaviour to a waiter in a Hanmer Springs restaurant (3 News 13 May 2013) Quantity: 1 digital cartoon(s).

Images, Alexander Turnbull Library

A bus tours a city street with destroyed schools either side. The guide points out destruction on the right from earthquakes and on the left from Hekia Parata. Wider context is the ongoing impact of the Christchurch February 2011 earthquake. The implication is that the earthquake caused physical damage to some schools and that the Minister for Education is responsible for destroying others with her announcement of school closures in Christchurch on 18 February 2013. Quantity: 1 digital cartoon(s).

Images, Alexander Turnbull Library

Shows a sick and damaged Christchurch Anglican Cathedral in a hospital bed with two attendants. The Cathedral asks 'Can ya just pull the plug and let me die peacefully?'. Context refers to recent comments by Bishop Victoria Matthews that the Christchurch Cathedral is 'being left to die with no dignity' because of ongoing legal battles about its future. There has been ongoing debate and controversy over whether the Cathedral should be demolished, reconstructed or restored following damage suffered in the February 2011 Earthquake. Quantity: 1 digital cartoon(s).

Images, Alexander Turnbull Library

Roger Sutton, former chief executive of the the power lines company, Orion and since June 2011 Chief Executive Officer of the Canterbury Earhquake Recovery Authority, is shown in a straitjacket, raving. An unseen interviewer asks him how it feels after 'two years in the job'. Roger Sutton's work in leading the Earthquake Authority after the February earthquake was extremely stressful, considering the magnitude of the task. Quantity: 1 digital cartoon(s).

Images, Alexander Turnbull Library

Depicts Christchurch Mayor Bob Parker striking a pose under a spotlight while standing astride broken masonry. He is being interviewed by media. On the right of frame, Progressive Party leader and MP Jim Anderton is under dark clouds and caught under the Beehive. Refers to the 2010 Christchurch mayoral elections in which Parker won over Anderton. Prior to the 2010 Canterbury earthquake, Anderton was ahead in the polls. The quake devastation was said to have given Parker a bigger profile than Anderton and been a factor in his win (TV3 9 October 2010). Quantity: 1 digital cartoon(s).

Images, Alexander Turnbull Library

An exceedingly large 'Gerry' Brownlee, the Minister for Earthquake Recovery, rises from a chair, holding a briefcase labeled 'CERA' and calling for 'Bob' Parker, the mayor of Christchurch. The thin Parker was flattened against Brownlee's enormous rear, when Brownlee sat on the chair. Brownlee and Parker had a strained relationship, with the government taking an increasing amount of control in local decision making. After ongoing assurances by Parker that Christchurch City Council would meet all of International Accreditation New Zealand's requirements on issuing building consents, Brownlee announced in June 2013 without Parker's prior knowledge that the authority had withdrawn its accreditation. Quantity: 1 digital cartoon(s).

Images, Alexander Turnbull Library

The Earthquake Commission calls a householder and tells him the 'good news' that his house which was left by the earthquakes in 'such an angle you couldn't live in it' has been refloated by the recent heavy rain and is now level again. The 'bad news' is that the house was last seen floating in the sea off Sumner. In June 2013 heavy rains had caused flooding in Canterbury. Christchurch was affected especially in the liquefaction prone areas, where the ground had sunk because of the earthquakes. Colour and black and white versions available Other Titles - Evans, Malcolm Paul, 1945-:"Established in a conservation estate...likely to harm our unique flora and fauna..." 31 May 2013 Quantity: 2 digital cartoon(s).

Research papers, University of Canterbury Library

Novel Gel-push sampling was employed to obtain high quality samples of Christchurch sands from the Central Business District, at sites where liquefaction was observed in 22 February 2011, and 13 June 2011 earthquakes. The results of cyclic triaxial testing on selected undisturbed specimens of typical Christchurch sands are presented and compared to empirical procedures used by practitioners. This comparison suggests cyclic triaxial data may be conservative, and the Magnitude Scaling Factor used in empirical procedures may be unconservative for highly compressible soils during near source moderate to low magnitude events. Comparison to empirical triggering curves suggests the empirical method generally estimates the cyclic strength of Christchurch sands within a reasonable degree of accuracy as a screening evaluation tool for liquefaction hazard, however for sands with moderate to high fines content it may be significantly unconservative, highlighting the need for high quality sampling and testing on important projects where seismic performance is critical.

Research papers, University of Canterbury Library

Christchurch and Canterbury suffered significant housing losses due to the earthquakes. Estimates from the Earthquake Commission (EQC) (2011) suggest that over 150,000 homes (around three quarters of Christchurch housing stock) sustained damage from the earthquakes. Some areas of Christchurch have been declared not suitable for rebuilding, affecting more than 7,500 residential properties.

Images, Alexander Turnbull Library

Shows a throng of sex workers rushing back following the announcement that 'Manchester Street's open!'. Prior to the Christchurch earthquake in February 2011 Manchester Street was the focus of street prostitution. On 13 April 2013 the Canterbury Earthquake Recovery Authority (CERA) announced: 'A temporary change to the cordon tonight sees Manchester Street open all the way through for the first time in over two years'. Quantity: 1 digital cartoon(s).

Research papers, University of Canterbury Library

The city of Christchurch and its surrounds experienced widespread damage due to soil liquefaction induced by seismic shaking during the Canterbury earthquake sequence that began in September 2010 with the Mw7.1 Darfield earthquake. Prior to the start of this sequence, the city had a large network of strong motion stations (SMSs) installed, which were able to record a vast database of strong ground motions. This paper uses this database of strong ground motion recordings, observations of liquefaction manifestation at the ground surface, and data from a recently completed extensive geotechnical site investigation program at each SMS to assess a range of liquefaction evaluation procedures at the four SMSs in the Christchurch Central Business District (CBD). In general, the characteristics of the accelerograms recorded at each SMS correlated well with the liquefaction evaluation procedures, with low liquefaction factors of safety predicted at sites with clear liquefaction identifiers in the ground motions. However, at sites that likely liquefied at depth (as indicated by evaluation procedures and/or inferred from the characteristics of the recorded surface accelerograms), the presence of a non-liquefiable crust layer at many of the SMS locations prevented the manifestation of any surface effects. Because of this, there was not a good correlation between surface manifestation and two surface manifestation indices, the Liquefaction Potential Index (LPI) and the Liquefaction Severity Number (LSN).

Research papers, University of Canterbury Library

This paper presents insights from recent advanced laboratory testing of undisturbed and reconstituted specimens of Christchurch silty-sands. The purpose of the testing was to establish the cyclic strength of silty-sands from sites in the Central Business District (CBD), where liquefaction was observed in 4 September 2010, 22 February 2011, and 13 June 2011. Similar overall strengths were obtained from undisturbed and reconstituted tests prepared at similar densities, albeit with higher variability for the reconstituted specimens. Reconstituted specimens exhibited distinctly different response in terms of lower compressibility during initial loading cycles, and exhibited a more brittle response when large strains were mobilised, particularly for samples with high fines content. Given the lower variability in natural sample response and the possibility of age-related strength to be significant for sites not subjected to earthquakes, high quality undisturbed samples are recommended over the use of reconstituted specimens to establish the cyclic strength of natural sands.