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Images for aftershock; more images...

Images, UC QuakeStudies

A photographer outside the Christchurch Art Gallery. Behind him, members of Civil Defence have gathered outside after an aftershock hit during one of their briefings. The Christchurch Art Gallery served as the headquarters for Civil Defence after the 22 February 2011 earthquake.

Images, UC QuakeStudies

A photograph of the Arts Centre taken from Rolleston Avenue near the Botanic Gardens. The building has been cordoned off by wire fencing and a wooden structure has been secured to the tower with tie-downs to help reduce damage from further aftershocks.

Audio, Radio New Zealand

Christchurch Mayor Bob Parker, New standards for earthquake prone buildings in Christchurch, Some schools reopen, while others face permanent closure, PM says Defence Force's role to check CV, Plans to burn the Koran on hold not cancelled, Chances of magnitude aftershock hitting rapidly decreasing.

Images, UC QuakeStudies

The side of the Empire Hotel on London Street in Lyttelton where the brick wall has crumbled. Bracing has been placed on the front of the building to keep it together and limit further damage from aftershocks. The building has been cordoned off with fencing.

Images, UC QuakeStudies

Mayor Bob Parker entering the Christchurch Art Gallery after an aftershock hit during one of their briefings. A pile of shattered glass is in the main doorway. The Christchurch Art Gallery served as the headquarters for Civil Defence after the 22 February 2011 earthquake.

Images, Alexander Turnbull Library

The cartoon shows a man, a woman and a dog all yelling with fright. Refers to the series of severe aftershocks that again rocked Christchurch on January 2nd. The largest was a magnitude-5.5 shake shortly before 6am. All were centred at sea off New Brighton. Mayor Bob Parker said that fear that larger quakes could be triggered had been raised by residents, but the tsunami threat was "highly unlikely". Quantity: 1 digital cartoon(s).

Research papers, University of Canterbury Library

Recently developed performance-based earthquake engineering framework, such as one provided by PEER (Deierlein et al. 2003), assist in the quantification in terms of performance such as casualty, monetary losses and downtime. This opens up the opportunity to identify cost-effective retrofit/rehabilitation strategies by comparing upfront costs associated with retrofit with the repair costs that can be expected over time. This loss assessment can be strengthened by learning from recent earthquakes, such as the 2010 Canterbury and 2016 Kaikoura earthquakes. In order to investigate which types of retrofit/rehabilitation strategies may be most cost-effective, a case study building was chosen for this research. The Pacific Tower, a 22-storey EBF apartment located within the Christchurch central business district (CBD), was damaged and repaired during the 2010 Canterbury earthquake series. As such, by taking hazard levels accordingly (i.e. to correspond to the Christchurch CBD), modelling and analysing the structure, and considering the vulnerability and repair costs of its different components, it is possible to predict the expected losses of the aforementioned building. Using this information, cost-effective retrofit/rehabilitation strategy can be determined. This research found that more often than not, it would be beneficial to improve the performance of valuable non-structural components, such as partitions. Although it is true that improving such elements will increase the initial costs, over time, the benefits gained from reduced losses should be expected to overcome the initial costs. Aftershocks do increase the predicted losses of a building even in lower intensities due to the fact that non-structural components can get damaged at such low intensities. By comparing losses computed with and without consideration of aftershocks for a range of historical earthquakes, it was found that the ratio between losses due to main shock with aftershocks to the losses due to the main shock only tended to increase with increasing main shock magnitude. This may be due to the fact that larger magnitude earthquakes tend to generate larger magnitude aftershocks and as those aftershocks happen within a region around the main shock, they are more likely to cause intense shaking and additional damage. In addition to this observation, it was observed that the most significant component of loss of the case study building was the non-structural partition walls.

Images, Alexander Turnbull Library

Text at top left reads 'Earthquake... aftershock... or "new event"... one thing remains constant...' Below is a snail with 'EQC payments' printed on its shell. Context - This is a reference to the problems that Christchurch people are having in getting payments from the EQC (Earthquake Commission) Disgruntled tradespeople who are owed hundreds of thousands of dollars by EQC are considering legal action. Remaining unpaid can mean that companies may have to consider laying people off. The Amalgamated Workers Union says delays in EQC payments for housing repair work in quake-hit Christchurch are building to a crisis point. Two versions of this cartoon are available Quantity: 2 digital cartoon(s).

Images, UC QuakeStudies

A photograph of a sign in the Canterbury Quakes exhibition at the Canterbury Museum. The sign displays the number of aftershocks in Canterbury since the 4 September 2010 earthquake as of 9.00 am on the morning the photograph was taken. The tally was 9,787.

Images, UC QuakeStudies

A photograph of two chimneys on the footpath in front of the Cranmer Courts on the corner of Montreal and Kilmore Streets. The chimneys were removed from the building to limit further damage by aftershocks. Wire fencing has also been placed around the building as a cordon.

Audio, Radio New Zealand

More snow expected in Southland as region starts to mop up, United Future leader questions stability of Act, Seismologists say aftershocks tailing off for Canterbury, Questions raised over earthquake victims insurance, Gunmen attack tourists in Delhi shooting and Farm land drops two-thirds in value in one year.

Images, UC QuakeStudies

The Oxford Terrace Baptist Church with cracks on the front facade. Bracing has been placed under the roof and at the front of the church to support the building and limit further damage from aftershocks. A cordon has been made around the building with fencing and road cones.

Images, UC QuakeStudies

A photograph of the Cranmer Courts on the corner of Kilmore and Montreal Streets. The gable to the left has crumbled, and there is damage to the tip of the gable in the foreground. Wooden bracing has been placed on both walls to limit further damage from aftershocks.

Images, UC QuakeStudies

A sign on a bus stop on Victoria Street reading, "Bus stop temporarily closed, please use the next available bus stop on Papanui Road. No: 29 Service, please use the bus stop on Bealey Avenue (west of Montreal Street)." Many bus routes were affected by the 22 February aftershock.

Audio, Radio New Zealand

Strong aftershocks felt in Canterbury, Quake firms to seek government wage subsidy, More services, access to buildings being restored in Christchurch, Minister for Earthquake Recovery discusses plans, Heavy rain causes flooding and road closures in Lower North Island, Building codes minimised quake's injuries and damage, Glass supply freezes as Christchurch companies clean up.

Images, Alexander Turnbull Library

The title reads 'All shook up.... The cartoon shows the year '2010' shaking and dropping bits off the ends of the numbers. A second version has pupils inside the two zeros so that they look like eyes. Context - The Christchurch earthquake of 4 September 2010 and aftershocks which are continuing into 2011. 'All shook up' is the name of a song made famous by Elvis Presley. Quantity: 2 digital cartoon(s).

Images, UC QuakeStudies

A view looking west down Tuam Street across the High Street intersection. Road cones line the street. The photographer comments, "This was taken shortly after the 4th September earthquake. Police allowed us free access past the cordon and simply advised us to watch out for falling masonry. The access situation was much different after the February aftershock".

Images, Canterbury Museum

One blue soft cover children’s book titled 'Quaky Cat' with text by Diana Noonan and colour illustrations by Gavin Bishop. The earthquakes and accompanying aftershocks in Canterbury proved to be a very frightening experience, especially for children. This book was written in response to the 4 September 2010 earthquake to help children understan...