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Research papers, University of Canterbury Library

Semi-empirical models based on in-situ geotechnical tests have become the standard of practice for predicting soil liquefaction. Since the inception of the “simplified” cyclic-stress model in 1971, variants based on various in-situ tests have been developed, including the Cone Penetration Test (CPT). More recently, prediction models based soley on remotely-sensed data were developed. Similar to systems that provide automated content on earthquake impacts, these “geospatial” models aim to predict liquefaction for rapid response and loss estimation using readily-available data. This data includes (i) common ground-motion intensity measures (e.g., PGA), which can either be provided in near-real-time following an earthquake, or predicted for a future event; and (ii) geospatial parameters derived from digital elevation models, which are used to infer characteristics of the subsurface relevent to liquefaction. However, the predictive capabilities of geospatial and geotechnical models have not been directly compared, which could elucidate techniques for improving the geospatial models, and which would provide a baseline for measuring improvements. Accordingly, this study assesses the realtive efficacy of liquefaction models based on geospatial vs. CPT data using 9,908 case-studies from the 2010-2016 Canterbury earthquakes. While the top-performing models are CPT-based, the geospatial models perform relatively well given their simplicity and low cost. Although further research is needed (e.g., to improve upon the performance of current models), the findings of this study suggest that geospatial models have the potential to provide valuable first-order predictions of liquefaction occurence and consequence. Towards this end, performance assessments of geospatial vs. geotechnical models are ongoing for more than 20 additional global earthquakes.

Research papers, University of Canterbury Library

We measure the longer-term effect of a major earthquake on the local economy, using night-time light intensity measured from space, and investigate whether insurance claim payments for damaged residential property affected the local recovery process. We focus on the destructive Canterbury Earthquake Sequence (CES) 2010 -2011 as our case study. Uniquely for this event, more than 95% of residential housing units were covered by insurance, but insurance payments were staggered over 5 years, enabling us to identify their local impact. We find that night-time luminosity can capture the process of recovery and describe the recovery’s determinants. We also find that insurance payments contributed significantly to the process of economic recovery after the earthquake, but delayed payments were less affective and cash settlement of claims were more effective than insurance-managed repairs in contributing to local recovery.

Images, UC QuakeStudies

The old Railway Station clock tower on Moorhouse Avenue with plywood and steel reinforcement covering two sides, a crane hanging over top. The brickwork suffered extensive cracking during the earthquake making it in need for reinforcement. The clock has stopped at around 16:35, the time of the earthquake.

Images, UC QuakeStudies

A photograph submitted by Raymond Morris to the QuakeStories website. The description reads, "The New Zealand Express Co. Ltd. building (Manchester Courts) built in 1906 on the corner of Manchester and Hereford Sts. In its time it was Christchurch’s tallest office building. This painting is from the Raymond Morris Collection of earthquake demolished buildings.".

Images, UC QuakeStudies

A photograph captioned by BeckerFraserPhotos, "The interior of a house at 464 Avonside Drive which has cracks and other evidence of post earthquake life. Large containers of drinking water have been placed behind the armchairs for the next time power and water supplies are interrupted".

Images, UC QuakeStudies

The old Railway Station clock tower on Moorhouse Avenue with plywood and steel reinforcement covering two sides, and a crane hanging over top. The brickwork suffered extensive cracking during the earthquake making it in need of reinforcement. The clock has stopped at around 16:35, the time of the earthquake.

Images, UC QuakeStudies

The old Railway Station clock tower on Moorhouse Avenue with plywood and steel reinforcement covering two sides, and a crane hanging over top. The brickwork suffered extensive cracking during the earthquake making it in need of reinforcement. The clock has stopped at around 16:35, the time of the earthquake.

Articles, UC QuakeStudies

A PDF copy of a pack of 22 Tiny Adventures cards. Created in partnership with SKIP, Tiny Adventures helped parents to spend quality time with their children by suggesting some simple activities. The cards were available in packs and free to download from www.allright.or.nz/adventures.

Articles, UC QuakeStudies

A PDF copy of a pack of 23 Tiny Adventures cards. Created in partnership with SKIP, Tiny Adventures helped parents to spend quality time with their children by suggesting some simple activities. The cards were available in packs and free to download from www.allright.or.nz/adventures.

Articles, UC QuakeStudies

A PDF copy of the map created for AWA Trails. It shows each of the four trails, the location of each of the twenty five spots to discover and the expected time to walk each track. The maps were available to download from the All Right? website.

Images, UC QuakeStudies

A photograph of Helen Campbell and Sigal Golan making mosaic leaves out of pieces of broken china.Crack'd for Christchurch comments, "In March an Israeli mosaicker travelling through New Zealand stayed with Helen for a week and gave us her time for free. Thank you Sigal Golan."

Articles, UC QuakeStudies

A PDF copy of a pack of 21 Tiny Adventures cards. Created in partnership with SKIP, Tiny Adventures helped parents to spend quality time with their children by suggesting some simple activities. The cards were available in packs and free to download from www.allright.or.nz/adventures.

Articles, UC QuakeStudies

A PDF copy of a pack of 21 Tiny Adventures cards. Created in partnership with SKIP, Tiny Adventures helped parents to spend quality time with their children by suggesting some simple activities. The cards were available in packs and free to download from www.allright.or.nz/adventures.

Images, UC QuakeStudies

A sewage pumping station on Avonside Drive near the intersection with Robson Avenue has been lifted out of the ground by liquefaction. The photographer comments, "A Sunday afternoon ride to New Brighton, then back via Aranui, Wainoni, Dallington, and Richmond. Not a cheerful experience. Pumping station. Another hydraulically-lifted sewage pumping station, this time on Avonside Drive".

Articles, UC QuakeStudies

A PDF copy of five Tiny Adventures cards that incorporate Maori culture and language. Created in partnership with SKIP, Tiny Adventures helped parents to spend quality time with their children by suggesting some simple activities. The cards were available in packs and free to download from www.allright.or.nz/adventures.

Images, UC QuakeStudies

A photograph submitted by Ginny Larsen to the QuakeStories website. The description reads, "Roadworks are a constant way of life in Christchurch post’quake. This is October 2012 – two weeks out from a major community event attended by over 1,000 people – imagine the organiser’s stress as they had moved right across the entrance to Redwood Place by the time it was happening!".

Articles, UC QuakeStudies

A PDF copy of the front and back of a pack of Tiny Adventures cards. Created in partnership with SKIP, Tiny Adventures helped parents to spend quality time with their children by suggesting some simple activities. The cards were available in packs and free to download from www.allright.or.nz/adventures.

Articles, UC QuakeStudies

A PDF copy of a poster encouraging people to try something new, one of the Five Ways to Wellbeing. The poster depicts two 'All Righties' harvesting a pumpkin and carrots and reads, "What good things are you growing? Wonderful things happen when we put in a little bit of time".

Articles, UC QuakeStudies

A PDF copy of a poster encouraging people to connect, one of the Five Ways to Wellbeing. The poster image depicts three 'All Righties' catching up over cakes and reads, "When did you last really catch up? Quality time with good friends can be the best medicine".

Images, UC QuakeStudies

An image from a Navy Today April 2011 article titled, "Project Protector Makes a Difference". The image shows the HMNZS Pukaki, Otago and Canterbury alongside each other at the Lyttelton Port. The earthquake response was the first time one ship of each Project Protector class had been in a New Zealand port together (outside of the naval base).

Images, UC QuakeStudies

A photograph of pieces of broken china laid on a mosaic design.Crack'd for Christchurch comments, "Marie begins the very first flower. It is so difficult and time consuming that we are all in despair. Will this take forever? No-one is getting paid and we all have jobs and lives in some chaos thanks to the earthquakes."

Images, UC QuakeStudies

A photograph captioned by BeckerFraserPhotos, "This photo epitomises aspects of many homes in the residential red zone. A home that used to be lovely once upon a time, and now is just a broken house, with indicators of the care once lavished upon it by the family that owned it in the rose bush still flowering by the door. Seabreeze Close, Bexley".

Images, UC QuakeStudies

A photograph of members of a church group holding shovels and spades. The group is volunteering their time in the Flockton Basin, a flood-prone residential area that underwent major flooding in March and April 2014. All Right? posted the photograph on their Facebook page on 7 March 2014 at 11:02am.

Images, UC QuakeStudies

An image used as a cover photo on the All Right? Facebook page. The image reads, "What good things are you growing? Wonderful things happen when we put in a little bit of time," and was captioned with a gardening tip. The image was also posted by All Right? to their Facebook page on 11 September 2013.