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Images, Alexander Turnbull Library

The cartoon shows New Zealand's flag but it has lost one of its four stars. Down in the lower right corner a group of rescue workers using cranes, a cherry picker and a long ladder have pulled the fourth star out of the rubble and are replacing it on the flag. Context - on 22 February 2011 a 6.3 magnitude earthquake struck in Christchurch which killed 185 people and caused very severe damage. Colour and black and white versions of this cartoon are available Quantity: 2 digital cartoon(s).

Images, Alexander Turnbull Library

It is night and a man and his wife are lifting their chemical toilet over the garden fence with the intention of emptying it into the neighbour's longdrop. The man confidently tells his wife to relax as the neighbour hasn't a clue they are planning to do this. The neighbour, meanwhile, sits in the outhouse holding a cricket bat at the ready. Context - toilet problems in Christchurch post earthquake 22 February 2011. Colour and black and white versions available Quantity: 2 digital cartoon(s).

Images, UC QuakeStudies

A photograph of the As Far As Eye Can See exhibition. On the left is a crocheted image of an eye, created by a group of women from Adelaide, and on the right are woven fabric artworks created by Christchurch craft artists in response.

Research papers, University of Canterbury Library

The Acheron rock avalanche is located in the Red Hill valley almost 80 km west of Christchurch and is one of 42 greywacke-derived rock avalanches identified in the central Southern Alps. It overlies the Holocene active Porters Pass Fault; a component of the Porters Pass-Amberley Fault Zone which extends from the Rakaia River to beyond the Waimakariri River. The Porters Pass Fault is a dextral strike-slip fault system viewed as a series of discontinuous fault scarps. The location of the fault trace beneath the deposit suggests it may represent a possible source of seismic shaking resulting in the formation of the Acheron rock avalanche. The rock mass composition of the rock avalanche source scar is Torlesse Supergroup greywacke consisting of massive sandstone and thinly bedded mudstone sequences dipping steeply north into the centre of the source basin. A stability analysis identified potential instability along shallow north dipping planar defects, and steep south dipping toppling failure planes. The interaction of the defects with bedding is considered to have formed conditions for potential instability most likely triggered by a seismic event. The dTositional area of the rock avalanche covers 7.2 x 105 m2 with an estimated volume of 9 x 10 m3 The mobilised rock mass volume was calculated at 7.5 x 106 m3• Run out of the debris from the top of the source scar to the distal limit reached 3500m, descending over a vertical fall of almost 700m with an estimated Fahrboschung of 0.2. The run out of the rock avalanche displayed moderate to high mobility, travelling at an estimated maximum velocity of 140-160 km/hour. The rapid emplacement of the deposit is confirmed by highly fragmented internal composition and burial of forest vegetation New radiocarbon ages from buried wood retrieved from the base of Acheron rock avalanche deposit represents an emplacement age closely post-dating (Wk 12094) 1152 ± 51 years B.P. This differs significantly from a previous radiocarbon age of (NZ547) 500 ± 69 years B.P. and modal lichenometry and weathering-rind thickness ages of approximately 460 ± 10 yrs and 490 ± 50 years B.P. The new age shows no resemblance to an earthquake event around 700- 500 years B.P. on the Porters Pass-Amberley Fault Zone. The DAN run out simulation using a friction model rheology successfully replicated the long run out and velocity of the Acheron rock avalanche using a frictron angle of 27° and high earth pressure coefficients of 5.5, 5.2, and 5.9. The elevated earth pressure coefficients represent dispersive pressures derived from dynamic fragmentation of the debris within the mobile rock avalanche, supporting the hypothesis of Davies and McSaveney (2002). The DAN model has potential applications for areas prone to large-scale instability in the elevated slopes and steep waterways of the Southern Alps. A paleoseismic investigation of a newly identified scarp of the Porters Pass Fault partially buried by the rock avalanche was conducted to identify any evidence of a coseismic relationship to the Acheron rock avalanche. This identified three-four fault traces striking at 078°, and a sag pond displaying a sequence of overbank deposits containing two buried soils representing an earthquake event horizon. A 40cm vertical offset of the ponded sediment and lower buried soil horizqn was recorded, which was dated to (Wk 13112 charcoal in palosol) 653 ± 54 years B.P. and (Wk 13034 palosol) 661 ± 34 years B.P. The evidence indicates a fault rupture occurred along the Porters Pass Fault, west of Porters Pass most likely extending to the Red Lakes terraces, post-dating 700 years B.P., resulting in 40cm of vertical displacement and an unknown component of dextral strike slip movement. This event post­ dates the event one (1000 ± 100 years B.P) at Porters Pass previously considered to represent the most recent rupture along the fault line. This points to a probable source for resetting of the modal weathering-rind thicknesses and lichen size populations in the Red Hill valley and possibly the Red Lakes terraces. These results suggest careful consideration must be given to the geomorphic and paleoseismic history of a specific site when applying surface dating techniques and furthermore the origin of dates used in literature and their useful range should be verified. An event at 700-500 years B.P did not trigger the Acheron rock avalanche as previously assumed supporting Howard's conclusions. The lack of similar aged rupture evidence in either of the Porters Pass and Coleridge trenches supports Howard's hypothesis of segmentation of the Porters Pass Fault; where rupture occurs along one fault segment but not along another. The new rock avalanche age closely post-dating 1200-1100 years B.P. resembles the poorly constrained event one rupture age of 1700-800 years B.P for the Porters Pass Fault and the tighter constrained Round Top event of 1010 ± 50 years B.P. on the Alpine Fault. Eight other rock avalanche deposits spread across the central Southern Alps also resemble the new ages however are unable to be assigned specific earthquake events due to the large associated error bars of± 270 years. This clustering of ages does represent compelling lines of evidence for large magnitude earthquake events occurring over the central Southern Alps. The presence of a rock avalanche deposit does not signify an earthquake based on the historical evidence in the Southern Alps however clustering of ages does suggest that large Mw >7 earthquakes occurred across the Southern Alps between 1200-900 years BP.

Research papers, University of Canterbury Library

The extent of liquefaction in the eastern suburbs of Christchurch (Aranui, Bexley, Avonside, Avonhead and Dallington) from the February 22 2011 Earthquake resulted in extensive damage to in-ground waste water pipe systems. This caused a huge demand for portable toilets (or port-a-loos) and companies were importing them from outside Canterbury and in some instances from Australia. However, because they were deemed “assets of importance” under legislation, their allocation had to be coordinated by Civil Defence and Emergency Management (CDEM). Consequently, companies supplying them had to ignore requests from residents, businesses and rest homes; and commitments to large events outside of the city such as the Hamilton 400 V8 Supercars and the Pasifika Festival in Auckland were impacted. Frustrations started to show as neighbourhoods questioned the equity of the port-a-loos distribution. The Prime Minister was reported as reassuring citizens in the eastern suburbs in the first week of March that1 “a report about the distribution of port-a-loos and chemical toilets shows allocation has been fair. Key said he has asked Civil Defence about the distribution process and where the toilets been sent. He said there aren’t enough for the scale of the event but that is quickly being rectified and the need for toilets is being reassessed all the time.” Nonetheless, there still remained a deep sense of frustration and exclusion over the equity of the port-a-loos distribution. This study took the simple approach of mapping where those port-a-loos were on 11-12 March for several areas in the eastern suburbs and this suggested that their distribution was not equitable and was not well done. It reviews the predictive tools available for estimating damage to waste water pipes and asks the question could this situation have been better planned so that pot-a-loo locations could have been better prioritised? And finally it reviews the integral roles of communication and monitoring as part of disaster management strategy. The impression from this study is that other New Zealand urban centres could or would also be at risk and that work is need to developed more rational management approaches for disaster planning.

Audio, Radio New Zealand

As Wellington debates the future of its earthquake-damaged central library, and Christchurch enjoys its new high tech one, it's the perfect time to really think about libraries of the future. 

Articles, Christchurch uncovered

Few would suspect that the now empty lot on the corner of Worcester, Gloucester and Manchester streets was once home to the famous Waverley Wine Vaults. Previously known as the Australasian Wine Vaults, the business was established in the late … Continue reading →

Articles, Christchurch uncovered

On Wednesday I celebrated my six year anniversary working at Underground Overground Archaeology. I did plan on marking this milestone by staying up all Tuesday night to bake a special six-tiered chocolate cake to bring in to work and share … Continue reading →

Other, National Library of New Zealand

Site where artists can donate songs which are compiled into an album to raise money for Christchurch earthquake relief. Includes information about the first album, how to submit a song, and an online shop; and news blog of quake- and album-related information.

Articles, Christchurch uncovered

Today on the blog we are discussing my favourite site of 2019. We already talked about part of the site’s history last fortnight on the blog- that it contained the store and offices for Walton, Warner and Co. and their … Continue reading →

Audio, Radio New Zealand

The head of the Earthquake Commission Ian Simpson says the claims from Friday's and July's earthquakes are being handled differently from the approach taken in Christchurch.

Audio, Radio New Zealand

When the new Canterbury Earthquake Memorial was revealed last month, something unusual happened for a work of public art. It was universally appreciated! Christchurch filmmaker Rick Harvie has documented the two year long project from seeking submissions though to the official ceremony. Rick tells Lynn Freeman he's about to put his now finished documentary, including footage of the ceremony and feedback from a range of people, online.

Audio, Radio New Zealand

The many arts organisations left homeless by the Christchurch earthquake, including the Christchurch Arts Festival and the Symphony Orchestra, have received good news this week from Creative New Zealand. We hear from CEO of Creative New Zealand Stephen Wainwright, manager of the Christchurch Arts Festival Steph Walker, and James Caygill from the Christchurch Symphony Orchestra.

Audio, Radio New Zealand

The Panel Christmas Special in downtown Auckland atop the Tyler Street Garage, featuring many of the regular panellists from 2011. Due to a Checkpoint special covering the Christchurch earthquake, this was not broadcast.

Audio, Radio New Zealand

Thirty-four years ago, Spectrum producer Jack Perkins recorded his award-winning documentary capturing the life, the sounds and the personalities of Cathedral square in Christchurch. In this edition of The Vault, Deborah Nation parallels that experience with the sounds of 2011 as she is escorted through the earthquake Red Zone into the square as it is today.

Articles, Christchurch uncovered

When Edward Gibbon Wakefield developed his theory of colonisation in c.1827 (while imprisoned for abducting a young woman) he envisioned for New Zealand the formation of an idealised English rural society, in which all hard-working labourers could aspire to rural … Continue reading →

Articles, Christchurch uncovered

Did you ever wonder where the concept of locking things up came from? The reality of human nature seems to be that ever since people have owned things that are deemed valuable, they need to be protected from theft. Not … Continue reading →

Articles, Christchurch uncovered

Childhood. We all had one. Whether we remember it vaguely or with clarity, we all passed through this phase of life. As infants we shook that baby rattle with all our might or nursed that pacifier until our eyes closed … Continue reading →