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Images for earthquake (February 2011); more images...

Images, UC QuakeStudies

A digger demolishing the Ozone Dressing Sheds building. The photographer comments, "This is the end of the Ozone Dressing Sheds built in 1914. The two storey Ozone Cafe, which was a hotel, will be given it's coup de grace on Friday. They were gutted in a spectacular fire in 1922, but were unable to be saved after the Christchurch earthquake on 22 February 2011".

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).

Audio, Radio New Zealand

Naval blockade: Greenpeace say its activists are willing to get arrested over their protest against a Brazilian oil company surveying off East Cape. Royal Commission: Legal experts are in agreement ... the purpose of the Royal Commission into February's earthquake in Christchurch is to investigate - not to incriminate.

Images, UC QuakeStudies

A photograph of an exhibition sign next to the Speaker's Chair on display in the Canterbury Quakes exhibition at the Canterbury Museum. The Speaker's Chair stood at the southern end of the Stone Chamber of the Canterbury Provincial Chambers, and survived the 22 February 2011 earthquake despite the damage to the chamber.

Audio, Radio New Zealand

The coroner has ruled the search and rescue effort at Christchurch's CTV building did not contribute to the deaths of eight people who survived the initial collapse. However Gordon Matenga criticised nearly every aspect of the fire service's response to the tragedy that claimed 115 of the 185 lives lost in the February 2011 earthquake.

Audio, Radio New Zealand

Questions to Ministers 1. Hon ANNETTE KING to the Minister of Finance: When he said recently "where the Government does have some influence, we are working hard to keep prices low", which prices was he referring to? 2. DAVID BENNETT to the Minister of Finance: What are some of the likely impacts on the Government's finances of the Christchurch earthquake? 3. Hon DAVID PARKER to the Acting Minister for Economic Development: Does he stand by all his statements on economic development? 4. Dr JACKIE BLUE to the Minister for ACC: How many claims has ACC received since the tragic earthquake on 22 February and what steps has the Government taken to facilitate prompt compensation for those seriously injured? 5. Hon MARYAN STREET to the Minister of Civil Defence: What is the basis for according priority to entry of the red zone in the Christchurch central business district? 6. NIKKI KAYE to the Minister for Social Development and Employment: What support is the Government giving to non-government organisations in Christchurch affected by the earthquake? 7. Hon TREVOR MALLARD to the Prime Minister: What role did he or his department play in the decision to shift the Rugby World Cup quarter finals, from AMI Stadium to Eden Park? 8. JACQUI DEAN to the Minister of Corrections: What progress has been made toward the Government's commitment to encourage private sector investment in the New Zealand corrections system? 9. Hon DARREN HUGHES to the Minister for Tertiary Education: What specific policy changes has the Government made to increase the number of apprenticeships and other building-skills training programmes since the September Canterbury earthquake? 10. SUE KEDGLEY to the Minister of Commerce: Will he use his powers under Part 4 of the Commerce Act 1986 to call for an investigation into the dairy wholesale and retail milk market, following the release of the Ministry of Agriculture and Forestry's review of the domestic milk market in New Zealand; if not, why not? 11. CAROL BEAUMONT to the Minister of Women's Affairs: Does she support the retention of the stand-alone and independent Ministry of Women's Affairs? 12. JOHN HAYES to the Minister of Agriculture: What steps has the Government recently made to progress agricultural greenhouse gas research?

Images, eqnz.chch.2010

The Cathedral of the Blessed Sacrament, Christcurch, after the 6.3 magnitude quake on 22 February 2011. When The Angels Fall Take your father's cross Gently from the wall A shadow still remaining See the churches fall In mighty arcs of sound And all that they're containing Yet all the rugged souls Looking for their lost homes Shuffle to...

Images, UC QuakeStudies

Detail of damage to the former Princess Cinema in New Brighton. Bricks have fallen from the wall, exposing the interior. The photographer comments, "This is the back of the old Princess Cinema in New Brighton after the earthquake in Christchurch, New Zealand on 22 February. The bricks seem to be just on the edge of falling. This building has now been knocked down as it was so dangerous".

Images, eqnz.chch.2010

The sign reads: The CTV Building was headquarters of Canterbury Television (CTV) and also housed King’s Education language School, a medical clinic, Hair Consultants, Relationship Services and a nursing school. On February 22nd 2011 the building collapsed as a result of a major earthquake. Sadly, 115 people who were in the building lost their l...

Images, Alexander Turnbull Library

ACT leader Rodney Hide stands alone in the middle of a blasted plain that was once the 'Christchurch CBD' and says 'A level playing field, excellent. Now we can leave the rest to the market'. Context - Christchurch after the earthquakes of 4 September 2010 and 22 February 2011. ACT explicitly promotes a free market philosophy - a (literal) level playing field in the Christchurch CBD sounds like an excellent opportunity to test the powers of the free market. Quantity: 1 digital cartoon(s).

Images, Alexander Turnbull Library

Text across the top of the cartoon reads 'Mayor in Nepal' Christchurch Mayor Bob Parker climbs a snowy slope towards 'Mt Junket'; he is followed by sherpas carrying candles, dining table and wine glasses. Bob Parker says 'I am focused on the summit and they don't get much bigger than this!' Context - Bob Parker gave the keynote address at a United Nations-sanctioned symposium in Nepal on disaster-risk reduction. The UN and the United States Government paid Parker's costs. The disaster risk symposium featured speakers from Pakistan and Haiti - two countries struck by large earthquakes.(The Press 15 February 2011) Quantity: 1 digital cartoon(s).

Images, Alexander Turnbull Library

Three people stand looking down at a small model of the 'Christchurch CBD'. One of the people says 'Love the safer low-rise plan What's the scale?' A second man says 'Scale? Er this is the actual size!' Context: Christchurch Mayor Bob Parker has dedicated the draft plan for a new-look Christchurch CBD to those lost in the February earthquake. The CBD will be about a quarter of its original size under the draft plan which was unanimously adopted by the council today. (TVNZ 11 August 2011) Quantity: 1 digital cartoon(s).

Research papers, University of Canterbury Library

This paper presents site-specific and spatially-distributed ground-motion intensity estimates which have been utilized in the aftermath of the 2010-2011 Canterbury, New Zealand earthquakes. The methodology underpinning the ground motion intensity estimation makes use of both prediction models for ground motion intensity and its within-event spatial correlation. A key benefit of the methodology is that the estimated ground motion intensity at a given location is not a single value but a distribution of values. The distribution is comprised of both a mean and standard deviation, with the standard deviation being a function of the distance to nearby observations at strong motion stations. The methodology is illustrated for two applications. Firstly, maps of conditional peak ground acceleration (PGA) have been developed for the major events in the Canterbury earthquake sequence, which among other things, have been utilized for assessing liquefaction triggering susceptibility of land in residential areas. Secondly, the conditional distribution of response spectral ordinates is obtained at the location of the Canterbury Television building (CTV), which catastrophically collapsed in the 22 February 2011 earthquake. The conditional response spectra provide insight for the selection of ground motion records for use in forensic seismic response analyses of important structures at locations where direct recordings are absent.

Research papers, University of Canterbury Library

Liquefaction-induced lateral spreading in large seismic events often results in pervasive and costly damage to engineering structures and lifelines, making it a critical component of engineering design. However, the complex nature of this phenomenon leads to designing for such a hazard extremely challenging and there is a clear for an improved understanding and predicting liquefaction-induced lateral spreading. The 2010-2011 Canterbury (New Zealand) Earthquakes triggered severe liquefaction-induced lateral spreading along the streams and rivers of the Christchurch region, causing extensive damage to roads, bridges, lifelines, and structures in the vicinity. The unfortunate devastation induced from lateral spreading in these events also rendered the rare opportunity to gain an improved understanding of lateral spreading displacements specific to the Christchurch region. As part of this thesis, the method of ground surveying was employed following the 4 September 2010 Darfield (Mw 7.1) and 22 February 2011 Christchurch (Mw 6.2) earthquakes at 126 locations (19 repeated) throughout Christchurch and surrounding suburbs. The method involved measurements and then summation of crack widths along a specific alignment (transect) running approximately perpendicular to the waterway to indicate typically a maximum lateral displacement at the bank and reduction of the magnitude of displacements with distance from the river. Rigorous data processing and comparisons with alternative measurements of lateral spreading were performed to verify results from field observations and validate the method of ground surveying employed, as well as highlight the complex nature of lateral spreading displacements. The welldocumented field data was scrutinized to gain an understanding of typical magnitudes and distribution patterns (distribution of displacement with distance) of lateral spreading observed in the Christchurch area. Maximum displacements ranging from less than 10 cm to over 3.5 m were encountered at the sites surveyed and the area affected by spreading ranged from less than 20 m to over 200 m from the river. Despite the highly non-uniform displacements, four characteristic distribution patterns including large, distributed ground displacements, block-type movements, large and localized ground displacements, and areas of little to no displacements were identified. Available geotechnical, seismic, and topographic data were collated at the ground surveying sites for subsequent analysis of field measurements. Two widely-used empirical models (Zhang et al. (2004), Youd et al. (2002)) were scrutinized and applied to locations in the vicinity of field measurements for comparison with model predictions. The results indicated generally poor correlation (outside a factor of two) with empirical predictions at most locations and further validated the need for an improved, analysis- based method of predicting lateral displacements that considers the many factors involved on a site-specific basis. In addition, the development of appropriate model input parameters for the Youd et al. (2002) model led to a site-specific correlation of soil behavior type index, Ic, and fines content, FC, for sites along the Avon River in Christchurch that matched up well with existing Ic – FC relationships commonly used in current practice. Lastly, a rigorous analysis was performed for 25 selected locations of ground surveying measurements along the Avon River where ground slope conditions are mild (-1 to 2%) and channel heights range from about 2 – 4.5 m. The field data was divided into categories based on the observed distribution pattern of ground displacements including: large and distributed, moderate and distributed, small to negligible, and large and localized. A systematic approach was applied to determine potential critical layers contributing to the observed displacement patterns which led to the development of characteristic profiles for each category considered. The results of these analyses outline an alternative approach to the evaluation of lateral spreading in which a detailed geotechnical analysis is used to identify the potential for large spreading displacements and likely spatial distribution patterns of spreading. Key factors affecting the observed magnitude and distribution of spreading included the thickness of the critical layer, relative density, soil type and layer continuity. It was found that the large and distributed ground displacements were associated with a thick (1.5 – 2.5 m) deposit of loose, fine to silty sand (qc1 ~4-7 MPa, Ic 1.9-2.1, qc1n_cs ~50-70) that was continuous along the bank and with distance from the river. In contrast, small to negligible displacements were characterized by an absence of or relatively thin (< 1 m), discontinuous critical layer. Characteristic features of the moderate and distributed displacements were found to be somewhere between these two extremes. The localized and large displacements showed a characteristic critical layer similar to that observed in the large and distributed sites but that was not continuous and hence leading to the localized zone of displacement. The findings presented in this thesis illustrate the highly complex nature of lateral displacements that cannot be captured in simplified models but require a robust geotechnical analysis similar to that performed for this research.

Research Papers, Lincoln University

Lincoln University and CBRE, a commercial real estate service provider, have conducted research to investigate the impacts of the Canterbury earthquake on the commercial office market in Christchurch. The 22 February 2011 Canterbury earthquake had a devastating impact on Christchurch property with significant damage caused to land and buildings. As at January 2012, around 740 buildings have either been demolished or identified to be demolished in central Christchurch. On top of this, around 140 buildings have either been partially demolished or identified to be partially demolished. The broad aims of our research are to (i) examine the nature and extent of the CBD office relocation, (ii) identify the nature of the occupiers, (iii) determine occupier’s perceptions of the future: their location and space needs post the February earthquake, and the likelihood of relocating back to the CBD after the rebuild, and (iv) find out what occupiers see as the future of the CBD, and how they want this to look.

Research papers, University of Canterbury Library

The objective of this study is to examine the influence of near-fault motions on liquefaction triggering in Christchurch and neighboring towns during the 2010-2011 Canterbury earthquake sequence (CES). The CES began with the 4 September 2010, Mw7.1 Darfield earthquake and included up to ten events that triggered liquefaction. However, most notably, widespread liquefaction was induced by the Darfield earthquake and the Mw6.2, 22 February 2011 Christchurch earthquake. Of particular relevance to this study is the forward directivity effects that were prevalent in the motions recorded during the Darfield earthquake, and to a much lesser extent, during the Christchurch earthquake. A 2D variant of the Richart-Newmark fatigue theory was used to compute the equivalent number of cycles (neq) for the ground motions, where volumetric strain was used as the damage metric. This study is unique because it considers the contribution and phasing of both the fault-normal and fault-parallel components of motion on neq and the magnitude scaling factor (MSF). It was found that when the fault-normal and fault-parallel motions were treated individually, the former yielded a lower neq than the latter. Additionally, when the combined effects of fault-normal and fault-parallel components were considered, it was found that the MSF were higher than those commonly used. This implies that motions containing near-fault effects are less demanding on the soil than motions that do not. This may be one of several factors that resulted in less severe liquefaction occurring during the Darfield earthquake than the Christchurch earthquake.

Images, Alexander Turnbull Library

Text above the image reads 'Time capsule discovered under founder's statue-' The statue of John Robert Godley, the founder of Christchurch, has toppled and a time capsule has been uncovered in the rubble by three rescue workers. One of them reads the document he has pulled out of the capsule and it says 'Personally I favoured Akaroa...' Context - the Christchurch earthquake of 22 February 2011 after which 2 time capsules were found under the John Robert Godfrey statue - they have been sent to Museum experts to open. Akaroa was largely unaffected by the earthquake. A Nelson newspaper 'The Colonist' in an article published in 1918 about the time capsule in Christchurch said, "This statute of John Robert Godley executed by Thomas Woolner was erected in the west side of the Cathedral Square by the Provincial Government of Canterbury, and unveiled by the late Sir Charles Christopher Bowen on August 6 1867, it was moved to this site in March 1918." (3 News 2 March 2011) Colour and black and white versions available Quantity: 2 digital cartoon(s).

Images, Alexander Turnbull Library

Text reads 'New fault lines?' and the cartoon depicts a Star of David as cracks in the ground. A second version has the text 'Aftershocks' and the cartoon depicts a shaky Star of David and big movements on a seismograph. The third version depicts the same image as the first but has the text 'SISpicious cracks'. Context: The Southland Times reported on 20th July that an Israeli national killed in the February Christchurch Earthquake was a Mossad spy. PM John Key has confirmed that an investigation into the four Israelis involved was carried out by police and the SIS but he said no evidence was found of a link between the group and Israeli intelligence. It would seem that the group were backpackers, not Mossad agents. Three versions of this cartoon are available Quantity: 3 digital cartoon(s).

Research papers, University of Canterbury Library

The potential for a gastroenteritis outbreak in a post-earthquake environment may increase because of compromised infrastructure services, contaminated liquefaction (lateral spreading and surface ejecta), and the presence of gastroenteritis agents in the drinking water network. A population in a post-earthquake environment might be seriously affected by gastroenteritis because it has a short incubation period (about 10 hours). The potential for a gastroenteritis outbreak in a post-earthquake environment may increase because of compromised infrastructure services, contaminated liquefaction (lateral spreading and surface ejecta), and the presence of gastroenteritis agents in the drinking water network. A population in a post-earthquake environment might be seriously affected by gastroenteritis because it has a short incubation period (about 10 hours). The aim of this multidisciplinary research was to retrospectively analyse the gastroenteritis prevalence following the February 22, 2011 earthquake in Christchurch. The first focus was to assess whether earthquake-induced infrastructure damage, liquefaction, and gastroenteritis agents spatially explained the recorded gastroenteritis cases over the period of 35 days following the February 22, 2011 earthquake in Christchurch. The gastroenteritis agents considered in this study were Escherichia coli found in the drinking water supply (MPN/100mL) and Non-Compliant Free Associated Chlorine (FAC-NC) (less than <0.02mg/L). The second focus was the protocols that averted a gastroenteritis outbreak at three Emergency Centres (ECs): Burnside High School Emergency Centre (BEC); Cowles Stadium Emergency Centre (CEC); and Linwood High School Emergency Centre (LEC). Using a mixed-method approach, gastroenteritis point prevalence and the considered factors were quantitatively analysed. The qualitative analysis involved interviewing 30 EC staff members. The data was evaluated by adopting the Grounded Theory (GT) approach. Spatial analysis of considered factors showed that highly damaged CAUs were statistically clustered as demonstrated by Moran’s I statistic and hot spot analysis. Further modelling showed that gastroenteritis point prevalence clustering could not be fully explained by infrastructure damage alone, and other factors influenced the recorded gastroenteritis point prevalence. However, the results of this research suggest that there was a tenuous, indirect relationship between recorded gastroenteritis point prevalence and the considered factors: earthquake-induced infrastructure damage, liquefaction and FAC-NC. Two ECs were opened as part of the post-earthquake response in areas with severe infrastructure damage and liquefaction (BEC and CEC). The third EC (CEC) provided important lessons that were learnt from the previous September 4, 2010 earthquake, and implemented after the February 22, 2011 earthquake. Two types of interwoven themes identified: direct and indirect. The direct themes were preventive protocols and indirect themes included type of EC building (school or a sports stadium), and EC staff. The main limitations of the research were Modifiable Areal Units (MAUP), data detection, and memory loss. This research provides a practical method that can be adapted to assess gastroenteritis risk in a post-earthquake environment. Thus, this mixed method approach can be used in other disaster contexts to study gastroenteritis prevalence, and can serve as an appendage to the existing framework for assessing infectious diseases. Furthermore, the lessons learnt from qualitative analysis can inform the current infectious disease management plans, designed for a post-disaster response in New Zealand and internationally Using a mixed-method approach, gastroenteritis point prevalence and the considered factors were quantitatively analysed. A damage profile was created by amalgamating different types of damage for the considered factors for each Census Area Unit (CAU) in Christchurch. The damage profile enabled the application of a variety of statistical methods which included Moran’s I , Hot Spot (HS) analysis, Spearman’s Rho, and Besag–York–Mollié Model using a range of software. The qualitative analysis involved interviewing 30 EC staff members. The data was evaluated by adopting the Grounded Theory (GT) approach. Spatial analysis of considered factors showed that highly damaged CAUs were statistically clustered as demonstrated by Moran’s I statistic and hot spot analysis. Further modelling showed that gastroenteritis point prevalence clustering could not be fully explained by infrastructure damage alone, and other factors influenced the recorded gastroenteritis point prevalence. However, the results of this research suggest that there was a tenuous, indirect relationship between recorded gastroenteritis point prevalence and the considered factors: earthquake-induced infrastructure damage, liquefaction and FAC-NC. Two ECs were opened as part of the post-earthquake response in areas with severe infrastructure damage and liquefaction (BEC and CEC). The third EC (CEC) provided important lessons that were learnt from the previous September 4, 2010 earthquake, and implemented after the February 22, 2011 earthquake. The ECs were selected to represent the Christchurch area, and were situated where potential for gastroenteritis was high. BEC represented the western side of Christchurch; whilst, CEC and LEC represented the eastern side, where the potential for gastroenteritis was high according to the outputs of the quantitative spatial modelling. Qualitative analysis from the interviews at the ECs revealed that evacuees were arriving at the ECs with gastroenteritis-like symptoms. Participants believed that those symptoms did not originate at the ECs. Two types of interwoven themes identified: direct and indirect. The direct themes were preventive protocols that included prolific use of hand sanitisers; surveillance; and the services offered. Indirect themes included the EC layout, type of EC building (school or a sports stadium), and EC staff. Indirect themes governed the quality and sustainability of the direct themes implemented, which in turn averted gastroenteritis outbreaks at the ECs. The main limitations of the research were Modifiable Areal Units (MAUP), data detection, and memory loss. It was concluded that gastroenteritis point prevalence following the February 22, 2011 earthquake could not be solely explained by earthquake-induced infrastructure damage, liquefaction, and gastroenteritis causative agents alone. However, this research provides a practical method that can be adapted to assess gastroenteritis risk in a post-earthquake environment. Creating a damage profile for each CAU and using spatial data analysis can isolate vulnerable areas, and qualitative data analysis provides localised information. Thus, this mixed method approach can be used in other disaster contexts to study gastroenteritis prevalence, and can serve as an appendage to the existing framework for assessing infectious diseases. Furthermore, the lessons learnt from qualitative analysis can inform the current infectious disease management plans, designed for a post-disaster response in New Zealand and internationally.

Images, Alexander Turnbull Library

The cartoon shows Gerry Brownlee, the Minister for Earthquake Recovery, walking towards a spa wearing swimming togs and with a blow-up toy around his waist. Context: The cartoon illustrated an article entitled 'Sutton candid about struggles'. Cera boss Roger Sutton received politicians in the empty Centennial Park spa pool after the February earthquake when he was still head of lines company Orion. Quantity: 1 digital cartoon(s).

Audio, Radio New Zealand

The woman who fought the odds to regain her mobility after being trapped and crushed in her collapsed work place, the PGC building, when Christchurch was devastated by the earthquake of February 22. She is now helping other quake victims, especially the children of injured parents some of who have had long periods of separation.

Audio, Radio New Zealand

It's been a long road to restore Christchurch's Isaac Theatre Royal, but tonight, it will finally open its doors again. The theatre sustained considerable damage in the earthquakes of 22nd February and 13th June 2011 and continuing shakes have made the restoration particularly difficult for architects. The project architect from Warren and Mahoney, is Vanessa Carswell.

Articles, UC QuakeStudies

A document outlining the Emergency Management Policy at the University of Canterbury in the time between the 4 September 2010 and 22 February 2011 earthquake. This policy was developed to provide a mandate for decisions that need to be taken to most appropriately and expeditiously respond to a planned event or unforeseen critical incident at the University of Canterbury.

Images, UC QuakeStudies

Part of Mike Hewson's installation 'Homage To Lost Spaces' in the Cramner Courts building, a photograph of a young man working at a desk has been inserted into a gap in the building. The photographer comments, "Cranmer Courts in Christchurch, New Zealand was very badly damaged in the earthquakes that have rocked the City for the past two years. Mike Hewson thought he would try to bring life back into the buildings by putting photographs into the spaces where the doors and windows were. There was a month or so when no one seemed to know or admit who had put the pictures up, but it was done officially. It seems that though very badly damaged the buildings may get restored".

Audio, Radio New Zealand

The government has been told to rein in competition between Christchurch schools and create hubs where they can cooperate. The call comes in some of the 230 submissions the government has received to help it draw up a plan for the renewal of education in the city in the wake of February's devastating earthquake.

Research papers, University of Canterbury Library

Active faults capable of generating highly damaging earthquakes may not cause surface rupture (i.e., blind faults) or cause surface ruptures that evade detection due to subsequent burial or erosion by surface processes. Fault populations and earthquake frequency-­‐magnitude distributions adhere to power laws, implying that faults too small to cause surface rupture but large enough to cause localized strong ground shaking densely populate continental crust. The rupture of blind, previously undetected faults beneath Christchurch, New Zealand in a suite of earthquakes in 2010 and 2011, including the fatal 22 February 2011 moment magnitude (Mw) 6.2 Christchurch earthquake and other large aftershocks, caused a variety of environmental impacts, including major rockfall, severe liquefaction, and differential surface uplift and subsidence. All of these effects occurred where geologic evidence for penultimate effects of the same nature existed. To what extent could the geologic record have been used to infer the presence of proximal, blind and / or unidentified faults near Christchurch? In this instance, we argue that phenomena induced by high intensity shaking, such as rock fragmentation and rockfall, revealed the presence of proximal active faults in the Christchurch area prior to the recent earthquake sequence. Development of robust earthquake shaking proxy datasets should become a higher scientific priority, particularly in populated regions.

Research papers, University of Canterbury Library

The Canterbury Earthquakes of 2010-2011, in particular the 4th September 2010 Darfield earthquake and the 22nd February 2011 Christchurch earthquake, produced severe and widespread liquefaction in Christchurch and surrounding areas. The scale of the liquefaction was unprecedented, and caused extensive damage to a variety of man-made structures, including residential houses. Around 20,000 residential houses suffered serious damage as a direct result of the effects of liquefaction, and this resulted in approximately 7000 houses in the worst-hit areas being abandoned. Despite the good performance of light timber-framed houses under the inertial loads of the earthquake, these structures could not withstand the large loads and deformations associated with liquefaction, resulting in significant damage. The key structural component of houses subjected to liquefaction effects was found to be their foundations, as these are in direct contact with the ground. The performance of house foundations directly influenced the performance of the structure as a whole. Because of this, and due to the lack of research in this area, it was decided to investigate the performance of houses and in particular their foundations when subjected to the effects of liquefaction. The data from the inspections of approximately 500 houses conducted by a University of Canterbury summer research team following the 4th September 2010 earthquake in the worst-hit areas of Christchurch were analysed to determine the general performance of residential houses when subjected to high liquefaction loads. This was followed by the detailed inspection of around 170 houses with four different foundation types common to Christchurch and New Zealand: Concrete perimeter with short piers constructed to NZS3604, concrete slab-on-grade also to NZS3604, RibRaft slabs designed by Firth Industries and driven pile foundations. With a focus on foundations, floor levels and slopes were measured, and the damage to all areas of the house and property were recorded. Seven invasive inspections were also conducted on houses being demolished, to examine in more detail the deformation modes and the causes of damage in severely affected houses. The simplified modelling of concrete perimeter sections subjected to a variety of liquefaction-related scenarios was also performed, to examine the comparative performance of foundations built in different periods, and the loads generated under various bearing loss and lateral spreading cases. It was found that the level of foundation damage is directly related to the level of liquefaction experienced, and that foundation damage and liquefaction severity in turn influence the performance of the superstructure. Concrete perimeter foundations were found to have performed most poorly, suffering high local floor slopes and being likely to require foundation repairs even when liquefaction was low enough that no surface ejecta was seen. This was due to their weak, flexible foundation structure, which cannot withstand liquefaction loads without deforming. The vulnerability of concrete perimeter foundations was confirmed through modelling. Slab-on-grade foundations performed better, and were unlikely to require repairs at low levels of liquefaction. Ribraft and piled foundations performed the best, with repairs unlikely up to moderate levels of liquefaction. However, all foundation types were susceptible to significant damage at higher levels of liquefaction, with maximum differential settlements of 474mm, 202mm, 182mm and 250mm found for concrete perimeter, slab-on-grade, ribraft and piled foundations respectively when subjected to significant lateral spreading, the most severe loading scenario caused by liquefaction. It was found through the analysis of the data that the type of exterior wall cladding, either heavy or light, and the number of storeys, did not affect the performance of foundations. This was also shown through modelling for concrete perimeter foundations, and is due to the increased foundation strengths provided for heavily cladded and two-storey houses. Heavy roof claddings were found to increase the demands on foundations, worsening their performance. Pre-1930 concrete perimeter foundations were also found to be very vulnerable to damage under liquefaction loads, due to their weak and brittle construction.

Audio, Radio New Zealand

1. Hon PHIL GOFF to the Prime Minister: Has the tax switch which he promised would leave no-one worse off fully compensated all New Zealanders for the rise in the cost of living over the last year; if not, which groups are worse off? 2. Dr RUSSEL NORMAN to the Minister of Finance: Does he agree that due to inflation, no new spending in the upcoming Budget is the equivalent of a cut in real terms? 3. DAVID BENNETT to the Minister of Finance: What tax changes take effect on or around 1 April? 4. Hon DAVID CUNLIFFE to the Minister of Finance: Why did he announce on 17 March 2011 that the Government would carry all the costs of earthquake reconstruction on its balance sheet with no reduction in operating spending, when the Prime Minister said just three days later that new operating spending would be reduced to zero? 5. AARON GILMORE to the Minister of Education: What progress has been made re-opening schools and early childhood education centres in Christchurch following the 22 February earthquake? 6. CHARLES CHAUVEL to the Minister of Civil Defence: To date, how many buildings have been demolished in Canterbury without notifications to the building or business owners? 7. HONE HARAWIRA to the Attorney-General: Is he satisfied that he has the support required for the Marine and Coastal Area (Takutai Moana) Bill to pass into law? 8. DARIEN FENTON to the Minister of Labour: What impact, if any, will the Christchurch earthquake have on the Government's employment law changes due to be implemented on 1 April? 9. JONATHAN YOUNG to the Minister of Corrections: What progress has been made toward the implementation of the smoking ban in New Zealand prisons? 10. CLARE CURRAN to the Minister for Communications and Information Technology: By what date will the 75 percent of urban New Zealanders receive ultra-fast broadband under his current proposal? 11. METIRIA TUREI to the Prime Minister: Does he stand by his statement that the "Government will build the effectiveness of New Zealand's public transport networks" and "will be working closely with the Auckland Council as they develop their strategic vision for the City through the Auckland Spatial Plan"? 12. TODD McCLAY to the Minister for Social Development and Employment: What counselling support is available for Cantabrians impacted by the earthquake?

Images, eqnz.chch.2010

The ticket office at Lancaster Park (AMI Stadium), not used since the February 2011 earthquake. Windows broken and door boarded up. We are still waiting to see what the outcome is for this stadium. Government want a new one closer to the CBD, so there is talk of this being demolished, while others want it repaired.

Images, Alexander Turnbull Library

Prime Minister John Key drives a tractor to which is attached a crane and a huge demolition ball in the shape of MP Gerry Brownlee's head; the ball smashes against a historic building bringing stone pediments down. Context - Gerry Brownlee, who is Earthquake Recovery Minister, has caused a stir by suggesting that if he had his way some of Christchurch's older buildings would be "down tomorrow". He also said the price of saving some historic buildings badly damaged in the February 22 earthquake was too high. People had died in the quake because of attempts to save historic buildings badly damaged in the September 4 quake. Brownlee said he had no regrets despite the stir his comments caused - but he was annoyed by suggestions the Cathedral and Riccarton House were among buildings he thought should be bowled. He believed those buildings should be saved, and they would be. "I'm not a philistine; I was chairman of the trust that actually saved Riccarton House from the bulldozers in 1990. "I understand conservation architecture very well and I do have an appreciation of heritage buildings." Original cartoon held at A-474-048 Quantity: 1 digital cartoon(s).