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Articles, UC QuakeStudies

A PDF copy of a proposal prepared by Anglican Advocacy (formerly the Anglican Life Social Justice Unit) and Te Whare Roimata to MBIE and CERA in 2012. The report outlines how social housing could look in Christchurch's Inner City East following the Christchurch earthquakes.

Images, Alexander Turnbull Library

Ruamoko, the Earthquake God, stirs in his bed, and with a sudden yawn, wonders if it is time to awake again. Above him Christchurch City trembles. On 15 May 2012, after several months of comparatively small quakes, a 4.5 Richter Scale earthquake was registered only 10 km East of Christchurch. Quake-weary Christchurch citizens feared that another large earthquake was on its way. Quantity: 1 digital cartoon(s).

Videos, UC QuakeStudies

A video about a restaurant in the Christchurch central city being shut down by CERA. The Southern Asian Restaurant, along with neighbouring Little Saignon and Jenny Craig, were deemed dangerous by CERA and ordered to stop trading with only 90 minutes notice. The video includes an interview with Lianne Dalziel, the Labour MP for Christchurch East, and April Ouyang, the owner of the Southern Asian Restaurant.

Images, UC QuakeStudies

A photograph looking east down Gloucester Street, towards the intersection of Manchester Street. On-lookers are surveying earthquake damage from behind the cordon. The Christchurch City Council parking building can be seen in the distance.

Research papers, University of Canterbury Library

In the period between September 2010 and December 2011, Christchurch (New Zealand) and its surroundings were hit by a series of strong earthquakes including six significant events, all generated by local faults in proximity to the city: 4 September 2010 (Mw=7.1), 22 February 2011 (Mw=6.2), 13 June 2011 (Mw=5.3 and Mw=6.0) and 23 December 2011 (M=5.8 and (M=5.9) earthquakes. As shown in Figure 1, the causative faults of the earthquakes were very close to or within the city boundaries thus generating very strong ground motions and causing tremendous damage throughout the city. Christchurch is shown as a lighter colour area, and its Central Business District (CBD) is marked with a white square area in the figure. Note that the sequence of earthquakes started to the west of the city and then propagated to the south, south-east and east of the city through a set of separate but apparently interacting faults. Because of their strength and proximity to the city, the earthquakes caused tremendous physical damage and impacts on the people, natural and built environments of Christchurch. The 22 February 2011 earthquake was particularly devastating. The ground motions generated by this earthquake were intense and in many parts of Christchurch substantially above the ground motions used to design the buildings in Christchurch. The earthquake caused 182 fatalities, collapse of two multi-storey reinforced concrete buildings, collapse or partial collapse of many unreinforced masonry structures including the historic Christchurch Cathedral. The Central Business District (CBD) of Christchurch, which is the central heart of the city just east of Hagley Park, was practically lost with majority of its 3,000 buildings being damaged beyond repair. Widespread liquefaction in the suburbs of Christchurch, as well as rock falls and slope/cliff instabilities in the Port Hills affected tens of thousands of residential buildings and properties, and shattered the lifelines and infrastructure over approximately one third of the city area. The total economic loss caused by the 2010-2011 Christchurch earthquakes is currently estimated to be in the range between 25 and 30 billion NZ dollars (or 15% to 18% of New Zealand’s GDP). After each major earthquake, comprehensive field investigations and inspections were conducted to document the liquefaction-induced land damage, lateral spreading displacements and their impacts on buildings and infrastructure. In addition, the ground motions produced by the earthquakes were recorded by approximately 15 strong motion stations within (close to) the city boundaries providing and impressive wealth of data, records and observations of the performance of ground and various types of structures during this unusual sequence of strong local earthquakes affecting a city. This paper discusses the liquefaction in residential areas and focuses on its impacts on dwellings (residential houses) and potable water system in the Christchurch suburbs. The ground conditions of Christchurch including the depositional history of soils, their composition, age and groundwater regime are first discussed. Detailed liquefaction maps illustrating the extent and severity of liquefaction across Christchurch triggered by the sequence of earthquakes including multiple episodes of severe re-liquefaction are next presented. Characteristic liquefaction-induced damage to residential houses is then described focussing on the performance of typical house foundations in areas affected by liquefaction. Liquefaction impacts on the potable water system of Christchurch is also briefly summarized including correlation between the damage to the system, liquefaction severity, and the performance of different pipe materials. Finally, the characteristics of Christchurch liquefaction and its impacts on built environment are discussed in relation to the liquefaction-induced damage in Japan during the 11 March 2011 Great East Japan Earthquake.

Images, Alexander Turnbull Library

A container labelled 'Chch East residents'has landed on the far side of the planet Mars. Others have landed or are descending. People in space suits exit the containers. One of them shakes hands with a green Martian commenting to him that the ground there is solid, it has nice views and the locals are a lot less alien than the insurance agents back home. Context: refers to NASA's exploration of the surface of Mars by the Curiosity rover. The rover landed on Mars in September 2012 and the ongoing problems of earthquake survivors in Christchurch's eastern suburbs. Quantity: 1 digital cartoon(s).