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Images for 4 September 2011; more images...

Images, Alexander Turnbull Library

A huge fist representing 'quakes', that is wearing a boxing glove, thumps a man who represents 'CHCH' (Christchurch) 'WHUMP! WHUMP! WHUMP!' The man is knocked out. Context - Magnitude 6.0 and 5.5 earthquakes rocked Christchurch again at 1pm and 2.20pm on 13th June 2011. These quakes follow the first earthquake on September 4th 2010 and the second on February 22nd 2011. (www.stuff.co.nz, 13 June 2011) Quantity: 1 digital cartoon(s).

Images, eqnz.chch.2010

Another house has gone from Seabreeze Close, Pacific Park, Bexley, leaving just the concrete base, a few floor tiles and the smashed toilet (throne). Houses are being demolished (85%) or deconstructed/shifted (15%) as a result of land damage in the major earthquakes of 4th September 2010, 22nd February 2011, 13th June 2011 and 23rd December 2...

Images, Alexander Turnbull Library

The globe is depicted as a hand grenade; the skeletal remains of a hand reach out to 'pull the pin'. Context - the fragility of the world from a New Zealand point of view seen in the light of the Christchurch earthquakes of 4 September 2010 and 22 February 2011 and the Japanese earthquake and tsunami of 22 February 2011 and the present threat of a nuclear catastrophe caused by damaged nuclear power plants. Quantity: 1 digital cartoon(s).

Images, UC QuakeStudies

A fire engine driving past the damaged Provincial Council Legislative Chamber on Durham Street. The building's roof and walls have collapsed, as has the scaffolding which was erected to repair it after the 4 September 2010 earthquake.

Images, Alexander Turnbull Library

The cartoon shows a house for sale in Christchurch after the earthquakes; there is a jagged rip through the house and the road outside that looks like a seismic graph after a lot of activity. The 'For Sale' sign says 'Open Plan living, open home, Seismologist's dream!'. Context - A house wrecked by the Christchurch earthquakes of September 4th 2010, February 22 2011 and June 13 2011. Quantity: 1 digital cartoon(s).

Images, eqnz.chch.2010

Badly damaged in both the September and February quakes and over 6000 aftershocks the Point Pleasant yacht club had started to sink into the Avon estuary before being demolished in July 2011 after the June 6.3 earthquake

Images, UC QuakeStudies

The partially collapsed St. Paul's-Trinity-Pacific Presbyterian Church on the corner of Cashel and Madras Streets. Scaffolding erected around the building after the 4 September 2010 earthquake has collapsed on to the Madras Street footpath.

Images, UC QuakeStudies

A photograph of an ornamental ceramic handbag with a broken handle.Crack'd for Christchurch comments, "This is where it all started, a piece of Katy Gold pottery, broken slightly in the 4 September 2010 earthquake, totally smashed in the 22 February 2011 earthquake."

Images, UC QuakeStudies

The damaged Provincial Council Legislative Chamber on Durham Street in the aftermath of the 22 February earthquake. The building's roof and walls have collapsed, as has the scaffolding which was erected to repair it after the 4 September earthquake.

Images, Alexander Turnbull Library

The cartoon shows a terribly disappointed rugby fan standing in the centre of a devastated Christchurch holding up a 'RWC ticket' and bleating 'BUT...' Context - The decision that there will be no Rugby World Cup games in Christchurch because of the damage caused by the earthquakes of 4 September 2010 and 22 February 2011. Colour and black and white versions of this cartoon are available Quantity: 2 digital cartoon(s).

Images, UC QuakeStudies

A photograph of the Observatory tower at the Christchurch Arts Centre. There are cracks in the masonry of the tower near where the two storeys join. The cracks formed as a result of the 4 September 2010 earthquake.

Images, Alexander Turnbull Library

A tall building sways and groans, creaks and rumbles during an earthquake. Someone from inside at the top of the building says 'Earthquake? No... This is an extreme adventure activity that you'll be billed for later!' Context - The earthquakes in Christchurch and the Canterbury region. The three major ones were on 4th September 2010, 22 February 2011 and 13 June 2011 and there have been hundreds of aftershocks. Quantity: 1 digital cartoon(s).

Images, UC QuakeStudies

One end of the Arts Centre photographed shortly after the 22 February 2011 earthquake. The gable of the building has crumbled and fallen to the ground, collapsing an awning. A large crack can be seen in the corner tower. Blue ties can be seen at the top of the tower, used to brace the structure after the 4 September 2010. This has probably limited the damage caused by the 22 February 2011 earthquake.

Images, UC QuakeStudies

Damage to the Provincial Chambers building on Durham Street. The front wall has collapsed onto the street, bringing the roof down with it. Scaffolding that was placed around the building after the 4 September 2010 earthquake has also collapsed.

Images, UC QuakeStudies

A digitally manipulated photograph of the badly twisted Medway Street footbridge. The photographer comments, "This bridge over the Avon River in Christchurch, New Zealand has been left in place since the first major earthquake back in September 2010. Graffiti artists or taggers are still leaving their marks on it even though it is nearly twisted at 90 degrees at one point".

Images, UC QuakeStudies

Two images of a house, taken before and after the earthquakes. In the after photograph the chimneys are gone, a column supporting the car port has partly collapsed, windows are broken, and the previously neat lawn and driveway are overgrown. The photographer comments, "This was a house that I was selling up to the September 2010 earthquake in Christchurch. It was on Avonside Drive, which was an area that has been badly hit in every earthquake that has hit the area. In the September quake parts of the house moved in different directions and one of the upstairs doors had to be smashed open to release one of the sons from his bedroom. This occurred in the dark with numerous aftershocks shaking the house. Liquefaction poured up through the floor and flowed down the drive. Everyone got out OK, but soon after the house was red stickered meaning it was dangerous to enter. The house was looted many times even though there was constant police patrols. When the most violent earthquake occurred on 22 February 2012 both the tall heavy chimneys came crashing through into the living areas. Subsequent earthquakes and aftershocks have caused one of the brick fence pillars to fall and the front garage pillar to break up and twist. The family's troubles did not end there. They moved into the home of one of their parents and this mansion of a home was so badly affected by the February earthquake that no one could enter to collect any of their or their parents' belongings. They now own a new home, which they are fond of except when the ground shakes yet again. There has been to date 10,712 earthquakes and aftershocks since 4 September 2010".

Images, Alexander Turnbull Library

A woman sits reading a newspaper with reports about the Japanese earthquake and the latest news on Christchurch post-earthquake. Her husband has just put a Jerry Lee Lewis record on the turntable and the song 'Whole lotta shakin' goin' on' is playing; he says Didn't I always say this guy was ahead of his time?' Context - The Christchurch earthquakes of September 4 2010 and February 22 2011 as well as the Japanese earthquake and tsunami of 11 March 2011. Quantity: 1 digital cartoon(s).

Images, Alexander Turnbull Library

Caricature of Mayor Bob Parker dissolving into quakes; below the image is the name 'Christchurch' in very quavery letters. A second version shows Bob Parker without the shakes and without the name 'Christchurch'. Context - Opinion seems to be that Mayor Bob Parker has shown excellent leadership during the earthquakes and aftershocks in Christchurch. The earthquakes were on 4 September and 22 February. Two versions of this cartoon are available Quantity: 2 digital cartoon(s).

Research papers, The University of Auckland Library

This paper presents preliminary field observations on the performance of selected steel structures in Christchurch during the earthquake series of 2010 to 2011. This comprises 6 damaging earthquakes, on 4 September and 26 December 2010, February 22, June 6 and two on June 13, 2011. Most notable of these was the 4 September event, at Ms7.1 and MM7 (MM as observed in the Christchurch CBD) and most intense was the 22 February event at Ms6.3 and MM9-10 within the CBD. Focus is on performance of concentrically braced frames, eccentrically braced frames, moment resisting frames and industrial storage racks. With a few notable exceptions, steel structures performed well during this earthquake series, to the extent that inelastic deformations were less than what would have been expected given the severity of the recorded strong motions. Some hypotheses are formulated to explain this satisfactory performance. http://db.nzsee.org.nz/SpecialIssue/44%284%290297.pdf

Images, UC QuakeStudies

A photograph of the earthquake damage to the Canterbury Provincial Chambers on Durham Street. The top of the chamber has crumbled, and the masonry has fallen onto the footpath. Scaffolding which was erected after the 4 September 2010 earthquake has also fallen.

Images, UC QuakeStudies

A photograph of the earthquake damage to the Canterbury Provincial Chambers on Durham Street. The top of the chamber has crumbled, and the masonry has fallen onto the footpath. Scaffolding which was erected after the 4 September 2010 earthquake has also fallen.

Images, Alexander Turnbull Library

The title is 'The next stage in earthquake prediction?... Six images show 'aromatherapists', auctioneers', chiropractors', fortune tellers', a 'sixth sense' and 'psychics'. Context - reference to all the unscientific ways of trying to predict earthquakes particularly dear to the hearts of Christchurch people who are enduring numerous aftershocks following the earthquake of 4th September 2010. Quantity: 1 digital cartoon(s).

Images, UC QuakeStudies

A badly damaged house in Burwood. Parts of the house have moved in different directions, leaving walls and doors misaligned. The photographer comments, "Although this looks like an extreme wide angle shot it is actually a house tilted in every direction at the same time. The earthquake caused the ground to vibrate and compress so much that the sandy soil liquefied and caused the ground to collapse under this modern home".

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, Alexander Turnbull Library

Two businessmen emerge from a building wondering whether 'Bill English' has ''Made any uplifting pronouncements on the economy or budget lately?..' On the footpath outside is Finance Minister Bill English wearing a sandwich board that reads 'the end is nigh' and carrying a banner that reads 'We're doomed'. Context - the impact of an already struggling economy of the Christchurch earthquakes of 4 September 2010 and 22 February 2011. Quantity: 1 digital cartoon(s).

Images, Alexander Turnbull Library

A man sits at a table reading a C.C.C. (Christchurch City Council) report with the title 'Where your rates go!' He says 'Rubbish collection sewer roads squanderings bail outs' Context - After the Christchurch earthquake of 4 September 2010 rates have been of particular concern to residents which means people are sensitive to any possibility of squandering. Quantity: 1 digital cartoon(s).