The 2010–2011 Canterbury earthquake sequence began with the 4 September 2010, Mw7.1 Darfield earthquake and includes up to ten events that induced liquefaction. Most notably, widespread liquefaction was induced by the Darfield and Mw6.2 Christchurch earthquakes. The combination of well-documented liquefaction response during multiple events, densely recorded ground motions for the events, and detailed subsurface characterization provides an unprecedented opportunity to add well-documented case histories to the liquefaction database. This paper presents and applies 50 high-quality cone penetration test (CPT) liquefaction case histories to evaluate three commonly used, deterministic, CPT-based simplified liquefaction evaluation procedures. While all the procedures predicted the majority of the cases correctly, the procedure proposed by Idriss and Boulanger (2008) results in the lowest error index for the case histories analyzed, thus indicating better predictions of the observed liquefaction response.
The electrical supply substation built into the Lion Breweries Canterbury Draught brewery in St Asaph Street, Christchurch. Now the whole complex is being demolished due to earthquake damage.
A document outlining the Emergency Management Policy at the University of Canterbury in the time between the 4 September 2010 and 22 February 2011 earthquake. This policy was developed to provide a mandate for decisions that need to be taken to most appropriately and expeditiously respond to a planned event or unforeseen critical incident at the University of Canterbury.
After the Christchurch earthquake of 22 February 2011, the authorities found a wide range of uses for shipping containers
Shows as asterisks, stars etc a list of curses and swear words used to describe the EQC, delays, Roger Sutton, Gerry Brownlee and insurance companies. Context: The words describe the frustration and stress being experienced by many people in Canterbury post earthquake. Quantity: 1 digital cartoon(s).
Shows a doctor trying to test the heart of New Zealand who sits on a chair shaking uncontrolably. The doctor thinks it must be substance abuse or alcoholism. Context: refers to the Christchurch earthquakes and earthquakes elsewhere in New Zealand. Quantity: 1 digital cartoon(s).
A ghoul appears beside the bed of a sleeping couple. The man says to his wife 'Relax dear... That bump in the night wasn't an aftershock!' Context: the suggestion is that in Christchurch people are more worried about aftershocks than ghosts. Refers to the Christchurch earthquakes. Quantity: 1 digital cartoon(s).
A Christchurch man wants to let his home. He stands in a fissure in the garden and tells a man with a large dog who is interested in renting 'Sorry, no dogs! They dig too many holes!' Context: Post earthquake Christchurch tries to return to normal. Quantity: 1 digital cartoon(s).
Scientists stand before a model that will predict earthquakes. The model is a large arm attached to wires and switches with a thumb that flicks coins '"Heads" we have big quake at five-o-clock... "tails" we don't'. Context: short term predictions (hours to days) are in general unlikely to be possible, at present. Relates to the Christchurch earthquakes which experts have said could go on for years. Quantity: 1 digital cartoon(s).
The cartoon shows the word 'Christchurch' fractured by earthquake. Text above reads 'The new tear(s)'. A second version has the text in the singular 'The new tear'. Context: In spite of Christchurch's great hopes for a new year without earthquakes, there have been numerous quakes and aftershocks. A wordplay on 'new year' and 'new tear' - that is weeping with fear and dismay. Two versions of this cartoon are available Quantity: 2 digital cartoon(s).
Liquefaction features and the geologic environment in which they formed were carefully studied at two sites near Lincoln in southwest Christchurch. We undertook geomorphic mapping, excavated trenches, and obtained hand cores in areas with surficial evidence for liquefaction and areas where no surficial evidence for liquefaction was present at two sites (Hardwick and Marchand). The liquefaction features identified include (1) sand blows (singular and aligned along linear fissures), (2) blisters or injections of subhorizontal dikes into the topsoil, (3) dikes related to the blows and blisters, and (4) a collapse structure. The spatial distribution of these surface liquefaction features correlates strongly with the ridges of scroll bars in meander settings. In addition, we discovered paleoliquefaction features, including several dikes and a sand blow, in excavations at the sites of modern liquefaction. The paleoliquefaction event at the Hardwick site is dated at A.D. 908-1336, and the one at the Marchand site is dated at A.D. 1017-1840 (95% confidence intervals of probability density functions obtained by Bayesian analysis). If both events are the same, given proximity of the sites, the time of the event is A.D. 1019-1337. If they are not, the one at the Marchand site could have been much younger. Taking into account a preliminary liquefaction-triggering threshold of equivalent peak ground acceleration for an Mw 7.5 event (PGA7:5) of 0:07g, existing magnitude-bounded relations for paleoliquefaction, and the timing of the paleoearthquakes and the potential PGA7:5 estimated for regional faults, we propose that the Porters Pass fault, Alpine fault, or the subduction zone faults are the most likely sources that could have triggered liquefaction at the study sites. There are other nearby regional faults that may have been the source, but there is no paleoseismic data with which to make the temporal link.
Canterbury residents were left confused after the earthquake after the news media reported they needed to evacuate but tsunami sirens were silent.
A woman who was badly injured in the February 2011 earthquake is critical of the proposed design of the Canterbury Earthquake Memorial.
From tomorrow, the Government is winding down the subsidy that allows earthquake-damaged businesses in Canterbury to keep paying their workers' wages.
The Canterbury Pacific Trust building on Worcester Street, viewed from behind security fencing. An open door shows the interior has been gutted.
The Earthquake Commission has been granted an interim injunction stopping a blogger sharing details from a leaked email with Canterbury home owners.
Radio New Zealand's Jessica Maddock reports in from outside the remains of the Canterbury TV building where people are still trapped alive.
Some Christchurch drainlayers repairing damage from the Canterbury Earthquake say there are delays and confusion in getting repayments from the earthquake commission.
The first full-length film documenting the lives of those affected by the Canterbury earthquakes had its premiere in Christchurch last night.
There is now a single appeal fund being managed by the New Zealand Red Cross to help those affected by Canterbury's earthquake.
Residents in one of the streets worst affected by the Canterbury earthquake say they're still in the dark about their future.
It's more tha 10 weeks since the seven point one magnitude Canterbury earthquake but the region continues to be shaken by aftershocks.
After a shaky few weeks in Canterbury thousands of earthquake survivors have been rocked again, this time by heavy metal greats, Metallica.
Labour is calling for the Government to rethink how the Earthquake Commission insures homeowners, in the aftermath of the disaster in Canterbury.
The Canterbury Earthquake Recovery Authority wants private insurers to provide homeowners with clear timeframes for when earthquake repairs will be carried out.
The Earthquake Recovery Minister and the Insurance Council both deny that insurance companies pressured the Government to relax building guidelines in Canterbury.
Earthquake engineers at the University of Canterbury are world-leaders in designing buildings that will be better able to withstand earthquake shaking.
The Black Caps captain will lay a wreath in Christchurch for the Canterbury earthquake remembrance service. Brenton Vannisselroy has te pūrongo hakinakina.
Photograph captioned by Fairfax, "Mosaic artist Sarah Rutland creates art work from broken objects and hopes to create art from Canterbury's rubble".
A two-page layout for a feature on Facebook, including a section on the use of social media following the Canterbury earthquakes.