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Research papers, University of Canterbury Library

We present ground motion simulations of the Porters Pass (PP) fault in the Canterbury region of New Zealand; a major active source near Christchurch city. The active segment of the PP fault has an inferred length of 82 km and a mostly strike-slip sense of movement. The PP fault slip makes up approximately 10% of the total 37 mm/yr margin-parallel plate motion and also comprises a significant proportion of the total strain budget in regional tectonics. Given that the closest segment of the fault is less than 45 km from Christchurch city, the PP fault is crucial for accurate earthquake hazard assessment for this major population centre. We have employed the hybrid simulation methodology of Graves and Pitarka (2010, 2015), which combines low (f<1 Hz) and high (f>1 Hz) frequencies into a broadband spectrum. We have used validations from three moderate magnitude events (š‘€š‘¤4.6 Sept 04, 2010; š‘€š‘¤4.6 Nov 06, 2010; š‘€š‘¤4.9 Apr 29, 2011) to build confidence for the š‘€š‘¤ > 7 PP simulations. Thus far, our simulations include multiple rupture scenarios which test the impacts of hypocentre location and the finite-fault stochastic rupture representation of the source itself. In particular, we have identified the need to use location-specific 1D š‘‰š‘ /š‘‰š‘ models for the high frequency part of the simulations to better match observations.

Research papers, University of Canterbury Library

Liquefaction-induced lateral spreading during the 2011 Christchurch earthquake in New Zealand was severe and extensive, and data regarding the displacements associated with the lateral spreading provides an excellent opportunity to better understand the factors that influence these movements. Horizontal displacements measured from optical satellite imagery and subsurface data from the New Zealand Geotechnical Database (NZGD) were used to investigate four distinct lateral spread areas along the Avon River in Christchurch. These areas experienced displacements between 0.5 and 2 m, with the inland extent of displacement ranging from 100 m to over 600 m. Existing empirical and semi-empirical displacement models tend to under estimate displacements at some sites and over estimate at others. The integrated datasets indicate that the areas with more severe and spatially extensive displacements are associated with thicker and more laterally continuous deposits of liquefiable soil. In some areas, the inland extent of displacements is constrained by geologic boundaries and geomorphic features, as expressed by distinct topographic breaks. In other areas the extent of displacement is influenced by the continuity of liquefiable strata or by the presence of layers that may act as vertical seepage barriers. These observations demonstrate the need to integrate geologic/geomorphic analyses with geotechnical analyses when assessing the potential for lateral spreading movements.

Research papers, University of Canterbury Library

Meeting the Sustainable Development Goals by 2030 involves transformational change in the business of business, and social enterprises can lead the way in such change. We studied Cultivate, one such social enterprise in Christchurch, New Zealand, a city still recovering from the 2010/11 Canterbury earthquakes. Cultivate works with vulnerable youth to transform donated compost into garden vegetables for local restaurants and businesses. Cultivateā€™s objectives align with SDG concerns with poverty and hunger (1 & 2), social protection (3 & 4), and sustainable human settlements (6 & 11). Like many grant-supported organisations, Cultivate is required to track and measure its progress. Given the organisationā€™s holistic objectives, however, adequately accounting for its impact reporting is not straightforward. Our action research project engaged Cultivate staff and youth-workers to generate meaningful ways of measuring impact. Elaborating the Community Economy Return on Investment tool (CEROI), we explore how participatory audit processes can capture impacts on individuals, organisations, and the wider community in ways that extend capacities to act collectively. We conclude that Cultivate and social enterprises like it offer insights regarding how to align values and practices, commercial activity and wellbeing in ways that accrue to individuals, organisations and the broader civic-community.

Research papers, University of Canterbury Library

Recent severe earthquakes, such as the 2010-2011 Christchurch earthquake series, have put emphasis on building resilience all over the world. To achieve such resilience, procedures for low damage seismic design have been developed to satisfy both life safety requirements and the need to minimize undesirable economic effects of required building repair or structural member replacement following a major earthquake. Seismic resisting systems following this concept are expected to withstand severe earthquakes without requiring major post-earthquake repairs, using isolating mechanisms or sacrificial systems that either do not need repair or are readily repairable or replaceable. These include the sliding hinge joint with asymmetric friction connections (SHJAFCs) in beam-to-column connections of the moment resisting steel frames (MRSFs) and symmetric friction connections (SFCs) in braces of the braced frames. A 9 m tall, configurable three-storey steel framed composite floor building incorporating frictionbased connections is to be tested using two linked bi-directional shake tables at the International joint research Laboratory of Earthquake Engineering (ILEE) facilities, Shanghai, China. The structural systems are configurable, allowing different moment and braced frame structural systems tested in two horizontal directions. The structure is designed and detailed to undergo, at worst, minor damage under a planned series of severe earthquakes.

Research papers, University of Canterbury Library

The Eastern Humps and Leader faults, situated in the Mount Stewart Range in North Canterbury, are two of the ā‰„17 faults which ruptured during the 2016 MW7.8 Kaikōura Earthquake. The earthquake produced complex, intersecting ground ruptures of these faults and the co-seismic uplift of the Mount Stewart Range. This thesis aims to determine how these two faults accommodated deformation during the 2016 earthquake and how they interact with each other and with pre-existing geological structures. In addition, it aims to establish the most likely subsurface geometry of the fault complex across the Mount Stewart Range, and to investigate the paleoseismic history of the Leader Fault. The Eastern Humps Fault strikes ~240Ā° and dips 80Ā° to 60Ā° to the northwest and accommodated right- lateral ā€“ reverse-slip, with up to 4 m horizontal and 2 m vertical displacement in the 2016 earthquake. The strike of the Leader Fault varies from ~155 to ~300Ā°, and dips ~30 to ~80Ā° to the west/northwest, and mainly accommodated left-lateral ā€“ reverse-slip of up to 3.5 m horizontal and 3.5 m vertical slip in the 2016 earthquake. On both the Eastern Humps and Leader faults the slip is variable along strike, with areas of low total displacement and areas where horizontal and vertical displacement are negatively correlated. Fault traces with low total displacement reflect the presence of off-fault (distributed) displacement which is not being captured with field measurements. The negative correlation of horizontal and vertical displacement likely indicates a degree of slip partitioning during the 2016 earthquake on both the Eastern Humps and Leader faults. The Eastern Humps and Leader faults have a complex, interdependent relationship with the local bedrock geology. The Humps Fault appears to be a primary driver of ongoing folding and deformation of the local Mendip Syncline and folding of the Mount Stewart Range, which probably began prior to, or synchronous with, initial rupture of The Humps Fault. The Leader Fault appears to use existing lithological weaknesses in the Cretaceous-Cenozoic bedrock stratigraphy to rupture to the surface. This largely accounts for the strong variability on the strike and dip of the Leader Fault, as the geometry of the surface ruptures tend to reflect the strike and dip of the geological strata which it is rupturing through. The Leader Fault may also accommodate some degree of flexural slip in the Cenozoic cover sequence of the Mendip Syncline, contributing to the ongoing growth of the fold. The similarity between topography and uplift profiles from the 2016 earthquake suggest that growth of the Mount Stewart Range has been primarily driven by multiple (>500) discrete earthquakes that rupture The Humps and Leader faults. The spatial distribution of surface displacements across the Mount Stewart Range is more symmetrical than would be expected if uplift is driven primarily by The Humps and Leader faults alone. Elastic dislocation forward models were used to model potential sub-surface geometries and the resulting patterns of deformation compared to photogrammetry-derived surface displacements. Results show a slight preference for models with a steeply southeast-dipping blind fault, coincident with a zone of seismicity at depth, as a ā€˜backthrustā€™ to The Humps and Leader faults. This inferred Mount Stewart Fault accommodated contractional strain during the 2016 earthquake and contributes to the ongoing uplift of the Mount Stewart Range with a component of folding. Right-lateral and reverse shear stress change on the Hope Fault was also modelled using Coulomb 3.3 software to examine whether slip on The Humps and Leader faults could transfer enough stress onto the Hope Fault to trigger through-going rupture. Results indicate that during the 2016 earthquake right-lateral shear and reverse stress only increased on the Hope Fault in small areas to the west of the Leader Fault, and similar ruptures would be unlikely to trigger eastward propagating rupture unless the Hope Fault was close to failure prior to the earthquake. Paleoseismic trenches were excavated on the Leader Fault at four locations from 2018 to 2020, revealing near surface (< 4m depth) contractional deformation of Holocene stratigraphy. Three of the trench locations uncovered clear evidence for rupture of the Leader Fault prior to 2016, with fault displacement of near surface stratigraphy being greater than displacement recorded during the 2016 earthquake. Radiocarbon dating of in-situ organic material from two trenches indicate a date of the penultimate earthquake on the Leader Fault within the past 1000 years. This date is consistent with The Humps and Leader faults having ruptured simultaneously in the past, and with multi-fault ruptures involving The Humps, Leader, Hundalee and Stone Jug faults having occurred prior to the 2016 Kaikōura earthquake. Overall, the results contribute to an improved understanding of the Kaikōura earthquake and highlight the importance of detailed structural and paleoseismic investigations in determining controls on earthquake ā€˜complexityā€™.

Research papers, University of Canterbury Library

Christchurch City Council (Council) is undertaking the Land Drainage Recovery Programme in order to assess the effects of the earthquakes on flood risk to Christchurch. In the course of these investigations it has become better understood that floodplain management should be considered in a multi natural hazards context. Council have therefore engaged the Jacobs, Beca, University of Canterbury, and HR Wallingford project team to investigate the multihazards in eastern areas of Christchurch and develop flood management options which also consider other natural hazards in that context (i.e. how other hazards contribute to flooding both through temporal and spatial coincidence). The study has three stages: ļ‚· Stage 1 Gap Analysis ā€“ assessment of information known, identification of gaps and studies required to fill the gaps. ļ‚· Stage 2 Hazard Studies ā€“ a gap filling stage with the studies identified in Stage 1. ļ‚· Stage 3 Collating, Optioneering and Reporting ā€“ development of options to manage flood risk. This present report is to document findings of Stage 1 and recommends the studies that should be completed for Stage 2. It has also been important to consider how Stage 3 would be delivered and the gaps are prioritised to provide for this. The level of information available and hazards to consider is extensive; requiring this report to be made up of five parts each identifying individual gaps. A process of identifying information for individual hazards in Christchurch has been undertaken and documented (Part 1) followed by assessing the spatial co-location (Part 2) and probabilistic presence of multi hazards using available information. Part 3 considers multi hazard presence both as a temporal coincidence (e.g. an earthquake and flood occurring at one time) and as a cascade sequence (e.g. earthquake followed by a flood at some point in the future). Council have already undertaken a number of options studies for managing flood risk and these are documented in Part 4. Finally Part 5 provides the Gap Analysis Summary and Recommendations to Council. The key findings of Stage 1 gap analysis are: - The spatial analysis showed eastern Christchurch has a large number of hazards present with only 20% of the study area not being affected by any of the hazards mapped. Over 20% of the study area is exposed to four or more hazards at the frequencies and data available. - The majority of the Residential Red Zone is strongly exposed to multiple hazards, with 86% of the area being exposed to 4 or more hazards, and 24% being exposed to 6 or more hazards. - A wide number of gaps are present; however, prioritisation needs to consider the level of benefit and risks associated with not undertaking the studies. In light of this 10 studies ranging in scale are recommended to be done for the project team to complete the present scope of Stage 3. - Stage 3 will need to consider a number of engineering options to address hazards and compare with policy options; however, Council have not established a consistent policy on managed retreat that can be applied for equal comparison; without which substantial assumptions are required. We recommend Council undertake a study to define a managed retreat framework as an option for the city. - In undertaking Stage 1 with floodplain management as the focal point in a multi hazards context we have identified that Stage 3 requires consideration of options in the context of economics, implementation and residual risk. Presently the scope of work will provide a level of definition for floodplain options; however, this will not be at equal levels of detail for other hazard management options. Therefore, we recommend Council considers undertaking other studies with those key hazards (e.g. Coastal Hazards) as a focal point and identifies the engineering options to address such hazards. Doing so will provide equal levels of information for Council to make an informed and defendable decision on which options are progressed following Stage 3.

Audio, Radio New Zealand

Over the summer on The Weekend we've been talking to recyclers and upcyclers, people who like the Wombles, are making good use of the things that they find, things that the everyday folks leave behind. This is true of Christchurch builder, artist and furniture maker, Tim McGurk. He says he works with whatever junk and materials he can find. Tim crafted several items from the materials salvaged from an earthquake damaged Christchurch house, as part of the Whole House Reuse project. He also made the news when he made a Star Wars inspired X-wing sculpture/lamp out of salvaged rimu.

Audio, Radio New Zealand

Putting his own subversive spin on Christchurch's proliferation of post-earthquake 'no go' and other public signs has kept artist Phllip Trusttum busy for the past few years. No Go! is the name of the latest exhibition of his 'Signs' series that's about to go on show in Picton. It includes a yellow dog straining at its leash to escape a No Dogs sign, while a cyclist tries to escape a prohibitive red circle. Phillip takes Lynn Freeman back to 2011 when his fascination with signs started. Philip Trusttum's exhibition No Go! opens on Wednesday, September 25, at the Diversion Gallery in Picton, Marlborough.

Images, UC QuakeStudies

A photograph of a preschool child wearing colourful necklaces and looking happy and excited. The photograph was taken at the Tiny Adventures launch at Niu Early Learning Centre in Linwood. Niu Early Learning Centre is managed by the Tongan Canterbury Community Trust. The Tiny Adventure card packs and smartphone app offer ideas, games and quick fun ways for parents to spend time with their children. They are a project of the All Right? mental health campaign.

Videos, UC QuakeStudies

A video of a presentation by Leanne Crozier, Director of Decipher Group Ltd, at the 2016 Seismics in the City Conference. The presentation is titled, "Deciphering Employment Trends in Post-quakes Canterbury and Tapping Top Talent in the Pursuit of Innovation".The abstract for the presentation reads, "Highlighting employment opportunities that have emerged as a result of the rebuild and uncovering trends that will endure over the long term."

Audio, Radio New Zealand

A review of the week's news, including: environmental protests against oil exploration off the East cape, changes to Legal Aid, plans to sell the Pike River coal mine, a Labour MP says his party's list is drawn up by"a gaggle of gays", confidence in the economy grows, extraordinary powers given to the Canterbury Earthquake Recovery Authority, the number of heritage buildings to be demolished after the quake grows, results from faultline mapping in Christchurch to be known within weeks, Mt Ruapehu to be monitored around the clock and Victoria Cross winners are awarded with stamps.

Audio, Radio New Zealand

Ngai Tahu's property portfolio has taken a direct hit from the Christchurch earthquake - losing value and suffering damage; A Northland iwi says a decade long battle to protect a large ancient burial cave on Karikari peninsular north east of Kaitaia, has taken its toll on several hapu; A lecturer specialising in Maori criminal law is question the timing of a Maori Party co-leader's attack on the justice system; The Housing Minister, Phil Heatley, says a project to build three three bedroomed houses and two kaumatua flats on the Chatham Islands, will go some way to easing a housing issue for Maori residents.

Audio, Radio New Zealand

A research project on news coverage about Maori, has found that tangata whenua are still regarded as lower class citizens; Ngai Tahu iwi says it's learnt from the Canterbury earthquakes, just how important it is to safeguard important documents such as its whakapapa database in a digital form, in case there's another natural disaster; New Zealand's largest Maori owned fishing company wants to see the unique Maori story pushed by companies doing business in Asian countries; Meanwhile Ngati Kahungunu Chairman, Ngahiwi Tomoana, who was the business group convenor, says Maori business leaders are keen to set up an office in China

Audio, Radio New Zealand

A research project on news coverage about Maori, has found that tangata whenua are still regarded as lower class citizens; Ngai Tahu iwi says it's learnt from the Canterbury earthquakes, just how important it is to safeguard important documents such as its whakapapa database in a digital form, in case there's another natural disaster; New Zealand's largest Maori owned fishing company wants to see the unique Maori story pushed by companies doing business in Asian countries; Meanwhile Ngati Kahungunu Chairman, Ngahiwi Tomoana, who was the business group convenor, says Maori business leaders are keen to set up an office in China.

Audio, Radio New Zealand

As we approach the tenth anniversary of the Christchurch earthquake there are renewed calls for an inquiry into how Southern Response dealt with Canterbury earthquake claimants. Last year the government set up a support package for those who were short changed by Southern Response for their earthquake repairs. It came after a landmark High Court case found Southern Response misled and deceived Karl and Alison Dodds. Insurance claimants advocate, Ali Jones, says ten years on, lessons haven't been learned from how people were treated by Southern Response. She told RNZ reporter Sally Murphy that dealing with them is hell.

Audio, Radio New Zealand

What the Panelists Finlay MacDonald and Peter Fa'afiu have been up to. The Reserve Bank has cut the Official Cash Rate to a record low 2%. Another book about retired All Blacks captain Richie McCaw has come out. The NZ Sevens rugby team is now officially out of medal contention. Are people all that interested in the Olympic games? Fairfax and Sky TV are in court over copyright issues. Christchurch City Councillor Ali Jones talks about what the cull of EQC staff will mean for life in the post-earthquake city.

Images, UC QuakeStudies

A photograph of a preschool child tossing a paper ball into a woven flax kete. The photograph was taken at the Tiny Adventures launch at Niu Early Learning Centre in Linwood. Niu Early Learning Centre is managed by the Tongan Canterbury Community Trust. The Tiny Adventure card packs and smartphone app offer ideas, games and quick fun ways for parents to spend time with their children. They are a project of the All Right? mental health campaign.

Images, UC QuakeStudies

A photograph of preschool children and adults looking excited as the All Righties arrive at the event. The photograph was taken at the Tiny Adventures launch at Niu Early Learning Centre in Linwood. Niu Early Learning Centre is managed by the Tongan Canterbury Community Trust. The Tiny Adventure card packs and smartphone app offer ideas, games and quick fun ways for parents to spend time with their children. They are a project of the All Right? mental health campaign.

Images, UC QuakeStudies

A photograph of Red Cross NZ volunteers in Cathedral Square holding All Right? corflute signs. The Christchurch Cathedral is in the background. The All Right? corflute signs are from phase 2 of the All Right? campaign, which sought to promote the 'Five Ways To Wellbeing' by asking simple, open-ended questions related to wellbeing. All Right? posted the photograph on their Facebook page on 4 November 2013 at 9.59am. This was captioned, "Our awesome Red Cross volunteers at the Square".

Images, UC QuakeStudies

An image suggesting how watching the Cricket World Cup Final can be an opportunity to connect. The image suggests watching the match with others and remembering all of the others watching the match too. The image is from the 'World Cup Final Survival Guide' which depicted ways to practice the Five Ways to Wellbeing while watching the match. All Right? posted the image on their Facebook page on 27 March 2015 at 3:19pm.

Images, UC QuakeStudies

A photograph of some of the artworks created by tape artists from Skillwise and the Deaf Community on the mural. Erica Duthie from Tape Art NZ is standing in front of the mural. The photograph was taken at Street Talk, a Tape Art residency held from 6 - 9 March 2014. Street Talk was a collaborative project between All Right?, Healthy Christchurch and Tape Art NZ that had Christchurch communities create large tape art murals on the south wall of Community and Public Health.

Images, UC QuakeStudies

A photograph of a pair of 'All Righties' and Erica Duthie from Tape Art NZ in front of the mural. Duthie is holding a tape art bubble to add to the mural. The photograph was taken at Street Talk, a Tape Art residency held from 6 - 9 March 2014. Street Talk was a collaborative project between All Right?, Healthy Christchurch and Tape Art NZ that had Christchurch communities create large tape art murals on the south wall of Community and Public Health.

Images, UC QuakeStudies

A photograph of five participants in the walk to celebrate Chinese National Day and the Moon Festival. Staff member Vaea Hutchen of the All Right? mental health campaign of the CDHB is wearing a tee shirt promoting the campaign. Others are wearing Chinese flags. The walk was held at the Upper Riccarton Library in September 2015. It was organised by the Canterbury Migrants Centre (formerly the Christchurch Migrants Centre) and was part of the Christchurch City Council's Walking Festival.

Images, UC QuakeStudies

A photograph of Christchurch City Councillor Glenn Livingstone cutting the cake to launch the Tiny Adventures campaign. The photograph was taken at the Tiny Adventures launch at Niu Early Learning Centre in Linwood. Niu Early Learning Centre is managed by the Tongan Canterbury Community Trust. The Tiny Adventure card packs and smartphone app offer ideas, games and quick fun ways for parents to spend time with their children. They are a project of the All Right? mental health campaign.

Images, UC QuakeStudies

A photograph of preschool children watching as the All Righties dance to the song "Let it go". The photograph was taken at the Tiny Adventures launch at Niu Early Learning Centre in Linwood. Niu Early Learning Centre is managed by the Tongan Canterbury Community Trust. The Tiny Adventure card packs and smartphone app offer ideas, games and quick fun ways for parents to spend time with their children. They are a project of the All Right? mental health campaign.

Images, UC QuakeStudies

A photograph of a preschool child making a call on a pretend telephone made from paper cups and string. The photograph was taken at the Tiny Adventures launch at Niu Early Learning Centre in Linwood. Niu Early Learning Centre is managed by the Tongan Canterbury Community Trust. The Tiny Adventure card packs and smartphone app offer ideas, games and quick fun ways for parents to spend time with their children. They are a project of the All Right? mental health campaign.

Images, UC QuakeStudies

A photograph of preschool children in colourful Pasifika costumes performing a welcome song and dance. The photograph was taken at the Tiny Adventures launch at Niu Early Learning Centre in Linwood. Niu Early Learning Centre is managed by the Tongan Canterbury Community Trust. The Tiny Adventure card packs and smartphone app offer ideas, games and quick fun ways for parents to spend time with their children. They are a project of the All Right? mental health campaign.

Images, UC QuakeStudies

A photograph of a preschool child in Pasifika traditional dress holding a drum and grinning at the camera. The photograph was taken at the Tiny Adventures launch at Niu Early Learning Centre in Linwood. Niu Early Learning Centre is managed by the Tongan Canterbury Community Trust. The Tiny Adventure card packs and smartphone app offer ideas, games and quick fun ways for parents to spend time with their children. They are a project of the All Right? mental health campaign.

Images, UC QuakeStudies

An image suggesting how watching the Cricket World Cup Final can be an opportunity to take notice. The image suggests being proud considering the journey the Black Caps have taken to get to the final. The image is from the 'World Cup Final Survival Guide' which depicted ways to practice the Five Ways to Wellbeing while watching the match. All Right? posted the image on their Facebook page on 27 March 2015 at 3:19pm.

Images, UC QuakeStudies

An image encouraging people to take notice. The image depicts an 'All Rightie' in a fluorescent vest standing by a road cone and gazing at the night sky and reads, "When was your last moment of wonder? Sometimes the quietest moments can really change our perspective." The image was from phase 2 of the All Right? campaign, promoting the Five Ways to Wellbeing. The Five Ways to Wellbeing is a simple, evidence-based approach to improving wellbeing, promoted by the Mental Heath Foundation.