These were scattered across the park.
Robbie watches a sand volcano smother his driveway.
File Reference: CCL-CE-2010-09-08-DSC02048 From the collection of Christchurch City Libraries
File Reference: CCL-CE-2013-09-30-EQNZ-2010.JPG Photo taken by G. Coster From the collection of Christchurch City Libraries
Avonhead Park Cemetery Interment Site. File reference: CCL-2012-02-27-AvonheadParkCemeteryIntermentSite-February-2012 DSC_020.JPG From the collection of Christchurch City Libraries.
Inside the library, storytime is on. Photos taken in Diamond Harbour Library on May 24, 2011 following the February 22 earthquake. File reference: CCL-2011-05-24-Diamond Harbour-After-The-Earthquake-IMG_17 From the collection of Christchurch City Libraries
File Reference: CCL-CE-2013-09-30-EQNZ-2010.JPG Photo taken by G. Coster From the collection of Christchurch City Libraries
A corner of the library Photos taken in Diamond Harbour Library on May 24, 2011 following the February 22 earthquake. File reference: CCL-2011-05-24-Diamond Harbour-After-The-Earthquake-IMG_18 From the collection of Christchurch City Libraries
Diamond Harbour is a two dog library. Photos taken in Diamond Harbour Library on May 24, 2011 following the February 22 earthquake. File reference: CCL-2011-05-24-Diamond Harbour-After-The-Earthquake-IMG_16 From the collection of Christchurch City Libraries
File Reference: CCL-CE-2013-09-30-EQNZ-2010.JPG Photo taken by G. Coster From the collection of Christchurch City Libraries
Magazines reflect the community interests. Photos taken in Diamond Harbour Library on May 24, 2011 following the February 22 earthquake. File reference: CCL-2011-05-24-Diamond Harbour-After-The-Earthquake-IMG_19 From the collection of Christchurch City Libraries
©2019. American Geophysical Union. All Rights Reserved. Earthquakes have been inferred to induce hydrological changes in aquifers on the basis of either changes to well water-levels or tidal behavior, but the relationship between these changes remains unclear. Here, changes in tidal behavior and water-levels are quantified using a hydrological network monitoring gravel aquifers in Canterbury, New Zealand, in response to nine earthquakes (of magnitudes M w 5.4 to 7.8) that occurred between 2008 and 2015. Of the 161 wells analyzed, only 35 contain water-level fluctuations associated with “Earth + Ocean” (7) or “Ocean” (28) tides. Permeability reduction manifest as changes in tidal behavior and increased water-levels in the near field of the Canterbury earthquake sequence of 2010–2011 support the hypothesis of shear-induced consolidation. However, tidal behavior and water-level changes rarely occurred simultaneously (~2%). Water-level changes that occurred with no change in tidal behavior reequilibrated at a new postseismic level more quickly (on timescales of ~50 min) than when a change in tidal behavior occurred (~240 min to 10 days). Water-level changes were more than likely to occur above a peak dynamic stress of ~50 kPa and were more than likely to not occur below ~10 kPa. The minimum peak dynamic stress required for a tidal behavior change to occur was ~0.2 to 100 kPa.
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The city of Christchurch has experienced over 10,000 aftershocks since the 4th of September 2010 earthquake of which approximately 50 have been greater than magnitude 5. The damage caused to URM buildings in Christchurch over this sequence of earthquakes has been well documented. Due to the similarity in age and construction of URM buildings in Adelaide, South Australia and Christchurch (they are sister cities, of similar age and heritage), an investigation was conducted to learn lessons for Adelaide based on the Christchurch experience. To this end, the number of URM buildings in the central business districts of both cities, the extent of seismic strengthening that exists in both cities, and the relative earthquake hazards for both cities were considered. This paper will report on these findings and recommend strategies that the city of Adelaide could consider to significantly reduce the seismic risk posed by URM buildings in future earthquake.
The Canterbury earthquake series of 2010/2011 has turned the city of Christchurch into a full scale natural laboratory testing the structural and non-structural response of buildings under moderate to very severe earthquake shaking. The lessons learned from this, which have come at great cost socially and economically, are extremely valuable in increasing our understanding of whole building performance in severe earthquakes. Given current initiatives underway on both sides of the Tasman towards developing joint Australasian steel and composite steel/concrete design and construction standards that would span a very wide range of geological conditions and seismic zones, these lessons are relevant to both countries. This paper focusses on the performance of steel framed buildings in Christchurch city, with greatest emphasis on multi-storey buildings, but also covering single storey steel framed buildings and light steel framed housing. It addresses such issues as the magnitude and structural impact of the earthquake series, importance of good detailing, lack of observed column base hinging, the excellent performance of composite floors and it will briefly cover research underway to quantify some of these effects for use in design.
A photograph of the earthquake damage to Bracken Antiques on Manchester Street.
A photograph of earthquake damage to the Gayhurst Road bridge in Avonside.
A photograph of earthquake damage to the Gayhurst Road bridge in Avonside.
Dave Dobbyn performing at the Christchurch Earthquake Memorial Service in Hagley Park.
The Christchurch Wizard at the Christchurch Earthquake Memorial Service in Hagley Park.
Prince William speaking at the Christchurch Earthquake Memorial Service in Hagley Park.
A photograph captioned by Paul Corliss, "Curries Road cable laying, post earthquake".
A photograph captioned by Paul Corliss, "Dallington Dairy, Gloucester Street. Post earthquake".
A photograph of workers inside an earthquake-damaged building on Manchester Street.
A photograph captioned by BeckerFraserPhotos, "Earthquake damage to River Road".