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Images, UC QuakeStudies

The damaged Snell Place footbridge. A crack is visible at the apex of the span. The photographer comments, "Before the Christchurch earthquakes this bridge used to be just just 9 feet at high tide above the River Avon. Now with the ends pushed together it has probably moved up another 9 feet".

Images, UC QuakeStudies

A digitally manipulated image of a mannequin. The photographer comments, "During the Christchurch earthquake on 22 February 2011 a lot of people were seriously injured or killed because they run out of buildings. Falling masonry from the exterior of the buildings hit them, but if they had remained inside they would have probably been perfectly safe".

Images, UC QuakeStudies

Damage to Englefield Lodge on Fitzgerald Avenue. A pile of bricks lies in front of the house, windows are boarded up, and wooden bracing is propping up the walls. A spray-painted message on a wall reads "We will try to save this house." The photographer comments, "A bike ride around the CBD. Englefield, Christchurch's oldest house, in Fitzgerald Ave".

Images, UC QuakeStudies

A digitally manipulated image of Latimer Square. The photographer comments, "It is so nice to stand in the middle of Latimer Square on a bright Winter's day and forget the havoc that is around you. The square has hardly been touched by the Christchurch earthquake, but it is surrounded by demolished and damaged buildings".

Images, UC QuakeStudies

Glass panels with brass surrounds, stacked inside a building. The photographer comments, "These were brass dividers that were brought inside the building two years ago after the Christchurch earthquake. They have been sitting there abandoned in a restaurant that will be either repaired and reopened at a later date or demolished like the many others of its kind".

Videos, UC QuakeStudies

A video of an address by Mike Greer, Director of Mike Greer Homes Ltd, at the 2014 Seismics and the City forum. This talk was part of the Building Opportunities section, and focused on the housing needs and the residential building opportunities in the inner city, Greater Christchurch, and the Canterbury region.

Images, UC QuakeStudies

A photograph of Nick Sargent (middle) and Melanie Oliver (right) drawing at a table at the Pallet Pavilion during Supernova City, a drawing workshop led by Melbourne-based New Zealand artist and architect Byron Kinnaird. This event was part of FESTA 2013, and invited people to make new, imaginative drawings of Christchurch city.

Images, UC QuakeStudies

The former Ozone Dressing Sheds in North New Brighton, with broken and boarded-up windows. The photographer comments, "This is the Ozone as it was before it was demolished. It appeared to have been in the process of being redecorated internally, but the February Christchurch earthquake seems to have caused its demise".

Audio, Radio New Zealand

An inquiry into the Earthquake Commission has found it was poorly prepared for the Canterbury earthquakes - and has left people with a "deep mistrust of government" that will take years to overcome. The government has this morning released findings from the inquiry, chaired by Dame Silvia Cartwright. Our Christchurch reporter, Conan Young, has been reading through the details and spoke with Māni Dunlop.  

Audio, Radio New Zealand

A couple of Christchurch men are collecting letterboxes from the city's red-zoned suburbs, to create sculptures to tell the stories of the homes which have been demolished since the February 2011 earthquake. One of the men is Evan Smith - who co-chairs a group called the Avon-Otakaro Network. It's working toward creating a riverside park along the Avon, where the houses once stood.

Audio, Radio New Zealand

Residents of Christchurch's coastal suburbs around New Brighton are being promised they won't have to wait another decade for an urgently needed new bridge. The existing one is a critical emergency escape route but is almost 100 years old and suffered significant damage in the 2011 earthquake. And as Timothy Brown reports, plans for an upgrade are grinding slowly ahead.

Images, Canterbury Museum

One section of power cable with cut ends, covered in rubber and black electrical tape; two smaller cables branching off the main section; damaged and twisted in the 22 February 2011 earthquake. One of the most noticeable effects of the earthquakes in Canterbury was the loss of basic infrastructure such as power, water and sewerage. The earthqu...

Images, Canterbury Museum

One orange and blue official uniform worn by members of the Japanese Disaster Relief Team that provided assistance after 22 February 2011 earthquake; 'Rescuer' badge on left chest with Japanese text underneath; Japanese flag badges on right of chest and right sleeve as part of 'Japanese / Disaster Relief Team / JDR' shield shaped badge. Blue and...

Images, Canterbury Museum

Eight white corflute boxes of sediment samples from the borehole drilled adjacent to the Canterbury Museum Rolleston Avenue facade following the 22 February 2011 earthquake. Project number 52160, Bore hole BH02 These sediment samples are from machine drilled borings taken from the land near the Rolleston Avenue facade of Canterbury Museum. The ...

Images, Canterbury Museum

One landscape colour digital photograph taken on 1 March 2011 showing the road between Franklin and Queenstown with an electronic road work sign depicting the words '12.51pm 2 minutes silence'. People all around New Zealand participated in gestures of support for Christchurch following the 6.3 magnitude earthquake on 22 February 2011. In Queens...

Audio, Radio New Zealand

Tonight on The Panel, Wallace Chapman is joined by panellists Ali Jones & Shane Te Pou to discuss: President Biden pardoning his son Hunter, and Avian Flu outbreak in Otago and news from the Labour party conference. Ali Jones is a communication adviser / writer/Broadcaster/ Christchurch earthquake claims preparer. Shane Te Pou is a former labour party activist and CEO of Mega

Images, eqnz.chch.2010

Here's Prarie, outside our flat, the day after the 7.1 earthquake hit Christchurch. You see the damage to the street, which continued through our flat. We were forced to move out once an engineer examined the cracks in our balcony, walls, floors, and ceilings, and told us the building was unsafe for living. One crack ran from the street, pres...

Images, eqnz.chch.2010

The St John The Evangelist Catholic Church in Leeston was cordoned off due to damage suffered during the magnitude 7.1 earthquake that struck mid-Canterbury on Saturday 4 September 2010.

Images, eqnz.chch.2010

The St John The Evangelist Catholic Church in Leeston was cordoned off due to damage suffered during the magnitude 7.1 earthquake that struck mid-Canterbury on Saturday 4 September 2010.

Images, eqnz.chch.2010

The farmer swore that his fence was erected in a straingt line, but mother nature had other ideas! Aftermath of the Saturday 4 September 2010 magnitude 7.1 earthquake at the previously unknown faultline along which the quake originated.

Images, eqnz.chch.2010

The farmer swore that his hedge was planted in a straingt line, but mother nature had other ideas! Aftermath of the Saturday 4 September 2010 magnitude 7.1 earthquake at the previously unknown faultline along which the quake originated.

Images, eqnz.chch.2010

The magnitude 7.1 earthquake that struck mid-Canterbury on Saturday 4 September 2010 broke the tip of the spire of the St John The Evangelist Catholic Church in Leeston

Images, eqnz.chch.2010

The farmer swore that his fence was erected in a straingt line, but mother nature had other ideas! Aftermath of the Saturday 4 September 2010 magnitude 7.1 earthquake at the previously unknown faultline along which the quake originated.

Research papers, University of Canterbury Library

This poster provides a comparison between the strong ground motions observed in the 22 February 2011 Mw6.3 Christchurch earthquake with those observed in Tokyo during the 11 March 2011 Mw9.0 Tohoku earthquake. The destuction resulting from both of these events has been well documented, although tsunami was the principal cause of damage in the latter event, and less attention has been devoted to the impact of earthquake-induced ground motions. Despite Tokyo being located over 100km from the nearest part of the causative rupture, the ground motions observed from the Tohoku earthquake were significant enough to cause structural damage and also significant liquefaction to loose reclaimed soils in Tokyo Bay. The author was fortunate enough (from the perspective of an earthquake engineer) to experience first-hand both of these events. Following the Tohoku event, the athor conducted various ground motion analyses and reconniassance of the Urayasu region in Tokyo Bay affected by liquefaction in collaboration with Prof. Kenji Ishihara. This conference is therefore a fitting opportunity in which to discuss some of authors insights obtained as a result of this first hand knowledge. Figure 1 illustrates the ground motions recorded in the Christchurch CBD in the 22 February 2011 and 4 September 2010 earthquakes, with that recorded in Tokyo Bay in the 11 March 2011 Tohoku earthquake. It is evident that these three ground motions vary widely in their amplitude and duration. The CBGS ground motion from the 22 February 2011 event has a very large amplitude (nearly 0.6g) and short duration (approx. 10s of intense shaking), as a result of the causal Mw6.3 rupture at short distance (Rrup=4km). The CBGS ground motion from the 4 September 2010 earthquake has a longer duration (approx. 30s of intense shaking), but reduced acceleration amplitude, as a result of the causal Mw7.1 rupture at a short-to-moderate distance (Rrup=14km). Finally, the Urayasu ground motion in Tokyo bay during the 11 March 2011 Tohoku earthquake exhibits an acceleration amplitude similar to the 4 September 2010 CBGS ground motion, but a significantly larger duration (approx 150s of intense shaking). Clearly, these three different ground motions will affect structures and soils in different ways depending on the vibration characteristics of the structures/soil, and the potential for strength and stiffness degradation due to cumulative effects. Figure 2 provides a comparison between the arias intensities of the several ground motion records from the three different events. It can be seen that the arias intensities of the ground motions in the Christchurch CBD from the 22 February 2011 earthquake (which is on average AI=2.5m/s) is approximately twice that from the 4 September 2010 earthquake (average AI≈1.25). This is consistent with a factor of approximately 1.6 obtained by Cubrinovski et al. (2011) using the stress-based (i.e.PGA-MSF) approach of liquefaction triggering. It can also be seen that the arias intensity of the ground motions recorded in Tokyo during the 2011 Tohoku earthquake are larger than ground motions in the Christchurch CBD from the 4 September 2011 earthquake, but smaller than those of the 22 February 2011 earthquake. Based on the arias intensity liquefaction triggering approach it can therefore be concluded that the ground motion severity, in terms of liquefaction potential, for the Tokyo ground motions is between those ground motions in Christchurch CBD from the 4 September 2010 and 22 February 2011 events.

Images, UC QuakeStudies

A photograph of the earthquake damage to the Provincial Hotel on the corner of Barbadoes and Cashel Streets. The second storey walls have crumbled, and the bricks have fallen onto the ground below. Scaffolding erected in front of the building is now on a lean. Wire fencing has been placed around the building as a cordon.