A notice on the cordon fence around the site where the CTV building once was. It says 'Please respect this site. In recognition of the special significance this site holds for the people of our city and all those affect by the earthquakes, the Christchurch City Council is working with Canterbury Museum to preserve aspects of our remembering. Tributes may be left at this site. Older tributes will be removed from archiving by the Canterbury Museum to become part of the city's memory of the Canterbury Earthquakes. Organic materials will be composted and used in the city's gardens'.
Coverage of the February 2011 Christchurch Earthquake on the Fairfax New Zealand news and information web site. Archived versions of the site cover the 2010 Canterbury earthquake and its aftermath.
News from the New Zealand herald site about the February 2011 Christchurch earthquake. Archived versions of the site cover the Canterbury earthquake of Sept. 4, 2010 and its aftermath.
Looking through the fence of a construction site where some ground foundation has been laid down. The heading on the sign on the fence says 'Caution. Construction Site. Authorised Personnel Only'.
Advanced seismic effective-stress analysis is used to scrutinize the liquefaction performance of 55 well-documented case-history sites from Christchurch. The performance of these sites during the 2010-2011 Canterbury earthquake sequence varied significantly, from no liquefaction manifestation at the ground surface (in any of the major events) to severe liquefaction manifestation in multiple events. For the majority of the 55 sites, the simplified liquefaction evaluation procedures, which are conventionally used in engineering practice, could not explain these dramatic differences in the manifestation. Detailed geotechnical characterization and subsequent examination of the soil profile characteristics of the 55 sites identified some similarities but also important differences between sites that manifested liquefaction in the two major events of the sequence (YY-sites) and sites that did not manifest liquefaction in either event (NN-sites). In particular, while the YY-sites and NN-sites are shown to have practically identical critical layer characteristics, they have significant differences with regard to their deposit characteristics including the thickness and vertical continuity of their critical zones and liquefiable materials. A CPT-based effective stress analysis procedure is developed and implemented for the analyses of the 55 case history sites. Key features of this procedure are that, on the one hand, it can be fully automated in a programming environment and, on the other hand, it is directly equivalent (in the definition of cyclic resistance and required input data) to the CPT-based simplified liquefaction evaluation procedures. These features facilitate significantly the application of effective-stress analysis for simple 1D free-field soil-column problems and also provide a basis for rigorous comparisons of the outcomes of effective-stress analyses and simplified procedures. Input motions for the analyses are derived using selected (reference) recordings from the two major events of the 2010-2011 Canterbury earthquake sequence. A step-by-step procedure for the selection of representative reference motions for each site and their subsequent treatment (i.e. deconvolution and scaling) is presented. The focus of the proposed procedure is to address key aspects of spatial variability of ground motion in the near-source region of an earthquake including extended-source effects, path effects, and variation in the deeper regional geology.
Site of the Canterbury Development Corporation (CDC), part of Christchurch City Council. When viewed May 2011 the focus of the site was to assist businesses affected by the 2011 Christchurch earthquake.
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 →
This paper presents an examination of ground motion observations from 20 near-source strong motion stations during the most significant 10 events in the 2010-2011 Canterbury earthquake to examine region-specific systematic effects based on relaxing the conventional ergodic assumption. On the basis of similar site-to-site residuals, surfical geology, and geographical proximity, 15 of the 20 stations are grouped into four sub-regions: the Central Business District; and Western, Eastern, and Northern suburbs. Mean site-to-site residuals for these sub-regions then allows for the possibility of non-ergodic ground motion prediction over these sub-regions of Canterbury, rather than only at strong motion station locations. The ratio of the total non-ergodic vs. ergodic standard deviation is found to be, on average, consistent with previous studies, however it is emphasized that on a site-by-site basis the non-ergodic standard deviation can easily vary by ±20%.
Discusses the history, purpose and the structure of the organisation. Also provides links to regional branches, news, newsletters, rural jobs- a resource for prospective employers and employees and resources such as guides, reports and contract and agreement forms. Earthquake related information can be found in the archived instances from September 2010-
Disclaimer: This blog post will mainly focus on fossicking on historic sites, as that’s what we have the greatest experience with in Christchurch. We wouldn’t be able to do justice to discussing fossicking on Māori sites, but it has occurred … Continue reading →
Site of Christchurch-based handmade denim clothing company. Includes details of available stock, fitting guides, and photo gallery. Archive section of the site shows production models available prior to the Christchurch Earthquake.
Last time on the blog we looked specifically at the beer bottle labels from our Akaroa site. Today’s blog post is essentially a part two, where we’re going to take a look at the other labels found on the site. … Continue reading →
At the start of an archaeological investigation we often consult historical documents to learn as much as we can about a site’s past. Such research can identify the buildings that were once present, the people associated with the site through … Continue reading →
Looking over the cordon fence towards the intesection of Latimer Square and Hereford Street. The vacant site was left after the demolition of Avonmore House, and a digger is seen on a demolition site on the left.
A photograph of the site of a demolished building on Papanui Road near Merivale Mall. Wire fencing has been placed in front of the site as a cordon.
Today I’m going to tell you about what is possibly my all-time favourite archaeological site (there is another contender, but it doesn’t have any connection to Christchurch or Canterbury so is unlikely to feature here). I reckon this site has … Continue reading →
In our last post, Jeremy talked about the site of H. F. Stevens, wholesale druggist, on Worcester Street near Cathedral Square. We excavated the site in 2011 and found a number of artefacts, including the Udolpho Wolfe’s bottles featured last … Continue reading →
A view of an empty site that is now covered with weeds and silt from liquefaction. On the site is a digger and two shipping containers. In the background, demolition work on the Manchester Securities House can be seen.
A view of an empty site that is now covered with weeds and silt from liquefaction. On the site is a digger and two shipping containers. In the background, demolition work on the Manchester Securities House can be seen.
Recent field investigations were carried out to define the shear wave velocity (VS) profile and site periods across the Canterbury region, supplementing earlier efforts in urban Christchurch. Active source surface wave testing, ambient wave field (passive) and H/V spectral ratio methods were used to characterise the soil profile in the region. H/V spectral ratio peaks indicate site periods in the range of 5-7 seconds across much of the Canterbury Plains, broadly consistent with those based on a 1D velocity model for the region. Site periods decrease rapidly in the vicinity of the Canterbury foothills and the Banks Peninsula outcrops. In Christchurch, the Riccarton Gravels result in a significant mode of vibration that has a much shorter period than the site period of the entire soil column down to basement rock.
A sign on a cordon fence on St Asaph Street reads "Stop. You must be inducted before entry." The photographer comments, "Safety comes first when it comes to demolition in the earthquake red zone in Christchurch, New Zealand".
A photograph of the former site of a block of apartments at 440 Oxford Terrace. The apartments were demolished after the land was zoned Red. Grass has begun to grow over the site. The number 466 has been spray-painted on the footpath in front, as well as the numbers of each apartment. This number is the incorrect street number for the site.
A photograph of the former site of Siobhan Murphy's house at 436 Oxford Terrace. Murphy's house was demolished after her land was zoned Red. Grass has grown over the site.
A scanned copy of a black and white photograph of graduation day at the University of Canterbury town site in 1972. The photograph depicts students dressed in regalia, moving in a procession through the quad.
A photograph of CPIT students digging on an empty site left by a demolished building. The site is being cleared in preparation for the 'Words of Hope' event.
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...
Damaged house in an overgrown site.
A photograph of the former site of Siobhan Murphy's house at 436 Oxford Terrace. Murphy's house was demolished after her land was zoned Red. Grass has grown over the site.
A photograph of the former site of the house at 466 Oxford Terrace. The house was demolished after the land was zoned Red. Wire fencing has been placed in front of the site.
A photograph of the former site of Siobhan Murphy's house at 436 Oxford Terrace. Murphy's house was demolished after her land was zoned Red. Grass has grown over the site.