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Images, UC QuakeStudies

Damage to the north side of the cathedral. A walkway from Gloucester Street to the Square was opened up for a few days to allow the public a closer look at the cathedral. Weeds can be seen growing around the war memorial in Cathedral Square.

Research papers, University of Canterbury Library

Oblique convergence of the Pacific and Australian Plates is accommodated in the northern South Island by the Marlborough Fault System. The Hope Fault is the southern of four major dextral strike-slip faults of this system. Hanmer Basin is a probable segment boundary between the Hope River and Conway segments of the Hope Fault. The Conway segment is transpressional and shows increasing structural complexity near the segment boundary at Hanmer Basin, with multiple Late Quaternary traces, and fault-parallel folding in response to across-fault shortening. Between Hossack Station and Hanmer Basin a crush zone in excess of one kilometre wide is exposed in incised streams and rivers. The crush zone has an asymmetrical geometry about the active trace of the Hope Fault, being only 100-300 metres wide south of the fault, and more than 500 metres wide north of the fault. The most intense deformation of Torlesse bedrock occurs at the south side of the fault zone, indicating that strain is accommodated against the fault footwall. North of the fault deformation is less intense, but occurs over a wider area. The wide fault zone at Hossack Station may reflect divergence of the Hanmer Fault, a major splay of the Hope Fault. At Hossack Station, the Hope Fault has accommodated at least 260 metres of dextral displacement during the Holocene. Dating of abandoned stream channels, offset by the Hope Fault, indicated a Late Holocene dextral slip-rate of 18±8 mm-¹ for the west end of the Conway segment. Using empirical formulae and inferred fault parameters, the expected magnitude of an earthquake generated by the Conway segment is M6.9 to M7.4; for an exceedence probability of 10%, the magnitude is M7.7 to M7.9. Effects associated with coseismic rupture of the Conway segment include shaking of up to MMIX along the ruptured fault and at Hanmer Basin. Uplift at the east end of Hanmer Basin, in conjunction with subsidence at the southwest margin of the basin, is resulting in the development of onlapping stratigraphy. Seismic reflection profiles support this theory. Possible along-fault migration of the basin is inferred to be a consequence of non-parallelism of the master faults.

Research papers, University of Canterbury Library

The November 2016 MW 7.8 Kaikōura Earthquake initiated beneath the North Culverden basin on The Humps fault and propagated north-eastwards, rupturing at least 17 faults along a cumulative length of ~180 km. The geomorphic expression of The Humps Fault across the Emu Plains, along the NW margin of Culverden basin, comprises a series of near-parallel strands separated by up to 3 km across strike. The various strands strike east to east-northeast and have been projected to mainly dip steeply to the south in seismic data (~80°). In this area, the fault predominantly accommodates right-lateral slip, with uplift and subsidence confined to releasing and restraining bends and step-overs at a range of scales. The Kaikōura event ruptured pre-existing fault scarps along the Emu Plains, which had been partly identified prior to the earthquake. Geomorphology and faulting expression of The Humps Fault on The Emu Plains was mapped, along with faulting related structures which did not rupture in the 2016 earthquake. Fault ruptures strands are combined into sections and the kinematic deformation of sections analysed to provide a moment tensor fault plane solution. This fault plane solution is consistent with the regional principal horizontal shortening direction (PHS) of ~115°, similar to seismic focal mechanism solutions of some of the nearby aftershocks of the Kaikōura earthquake, and similar to the adjacent Hope Fault. To constrain the timing of paleoseismic events, a trench was excavated across the fault where it crossed a late Quaternary alluvial fan. Mapping of stratigraphy exposed in the trench walls, and dating of variably deformed strata, constrains the pre-historic earthquake event history at the trench site. The available data provides evidence for at least three paleo-earthquakes within the last 15.1 ka, with a possible fourth (penultimate) event. These events are estimated to have occurred at 7.7-10.3 ka, 10.3-14.8 ka, and one or more events that are older than ~15.1 ka. Some evidence suggests an additional penultimate event between 1850 C.E and 7.7 ka. Time-integrated slip-rates at three locations on the fault are measured using paleo-channels as piercing points. These sites give horizontal slip rates of 0.57 ± 0.1 mm/year, 0.49 ± 0.1 mm/year and one site constrains a minimum of between 0.1 - 0.4 mm/year. Two vertical slip-rates are calculated to be constrained to a maximum of 0.2 ± 0.02 mm/year at one site and between 0.02 and 0.1 mm/year at another site. Prior to this study, The Humps fault had only been partially documented in reconnaissance level mapping in the district, and no previous paleoseismic or slip rate data had been reported. This project has provided a detailed fault zone tectonic geomorphic map and established new slip-rate and paleoseismic data. The results highlight that The Humps fault plays an important role in regional seismicity and in accommodating plate boundary deformation across the North Canterbury region.

Audio, Radio New Zealand

Primary and intermediate teachers marching in Christchurch echoed the message of their colleagues further north - they also want pay increases and improved working conditions. But they say that their classrooms are even more complex as they continue to deal with the effects of the earthquakes - and the associated trauma.

Images, UC QuakeStudies

Photograph captioned by Fairfax, "Businesswoman Angel Wu, president of North South Business Incorporated, says members of the mainly Chinese group of businesses and store operators have been rallying around to try to help members hardest hit by the earthquake. She talks of serious suffering for those worst-affected".

Audio, Radio New Zealand

Watching his father lead the rebuild of his hometown in Macedonia (now called the Republic of North Macedonia), after it was destroyed by an earthquake, inspired Misko Cubrinovski's 40-year career as an engineer. Professor Misko Cubrinovski is retiring after 20 of those years with the University of Canterbury. 

Images, eqnz.chch.2010

Awaiting the demolition ball! See the hole punched in by the neighbouring building (now demolished) during the February 22 2011 earthquake. This building is leaning to the north (left) while it's now demolished neighbour was leaning to the south (right). All because the crap land gave way underneath!

Images, eqnz.chch.2010

North Hagley Park, Christchurch, New Zealand. Tens of thousands turned out today to mark the one year anniversary of the devastating earthquake that struck the city at 12.51pm on 22 February, 2011. 185 people lost their lives. file.stuff.co.nz/stuff/12-51/ Took 4 pa...

Images, UC QuakeStudies

A paint-splattered chair sits in front of a brightly-coloured piano painted with a cat's face, part of Gap Filler's Painted Piano Project. The photographer comments, "Gap filler I believe has created three sites filled with a stage area, seating and a piano. This one is at the Junction of Bower Ave and Marine Parade on the site of the demolished TJs Kazbah and opposite the now demolished Ozone. They have really brightened the corner up and we just need a few people to gather and have a nice night of it".

Images, UC QuakeStudies

Photograph captioned by Fairfax, "John Key on his visit to Kaiapoi and Hororata to meet badly-affected people and see the damage from the earthquake. John Key talks to Murray Rowlands, the Federated Farmers North Canterbury Grain and Feeds Chairperson, with Agriculture Minister David Carter. They are on the Deans' property in Homebush".

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.

Audio, Radio New Zealand

Since the 7.8 magnitude earthquake jolted North Canterbury on Monday, the HMNZS Canterbury has evacuated about 640 people, 9.3 tonnes of baggage, a cat, 17 dogs. And, about 30,000 bees. But South Island beekeepers will face ongoing challenges. John Hartnell, is a Canterbury-based board member of Apiculture New Zealand.

Audio, Radio New Zealand

Thousands of people are making insurance claims after heavy rain and flooding in the north of New Zealand, especially in Auckland. Insurance lawyer Peter Woods has worked on property claims for earthquake damage in Canterbury and Marlborough.. He has also been an Independent Specialist Adviser to the government. Peter talks to Lisa Owen.

Videos, UC QuakeStudies

A video showing part of the demolition of the Ozone Hotel in New Brighton. Steve Taylor comments "She put up a good fight. The Ozone in New Brighton was damaged in the February earthquake in Christchurch, New Zealand. Here is the main corner of the structure being, as they say, deconstructed. At the end there is a reverent bow by the excavator. Just before this the claw had caught on the floor/ceiling and the whole building shook from side to side, but it still stayed in place."

Images, UC QuakeStudies

A digitally manipulated photograph of the partially-demolished Ozone Hotel. The photographer comments, "As if a deadly disease is moving out from Christchurch City red zone, the heritage buildings are being put down".

Images, UC QuakeStudies

A digger demolishing the Ozone Dressing Sheds building. The photographer comments, "This is the end of the Ozone Dressing Sheds built in 1914. The two storey Ozone Cafe, which was a hotel, will be given it's coup de grace on Friday. They were gutted in a spectacular fire in 1922, but were unable to be saved after the Christchurch earthquake on 22 February 2011".

Research papers, Lincoln University

The timing of large Holocene prehistoric earthquakes is determined by dated surface ruptures and landslides at the edge of the Australia-Pacific plate boundary zone in North Canterbury, New Zealand. Collectively, these data indicate two large (M > 7) earthquakes during the last circa 2500 years, within a newly formed zone of hybrid strike-slip and thrust faulting herein described as the Porter's Pass-to-Amberley Fault Zone (PPAFZ). Two earlier events during the Holocene are also recognized, but the data prior to 2500 years are presumed to be incomplete. A return period of 1300–2000 years between large earthquakes in the PPAFZ is consistent with a late Holocene slip rate of 3–4 mm/yr if each displacement is in the range 4–8 m. Historical seismicity in the PPAFZ is characterized by frequent small and moderate magnitude earthquakes and a seismicity rate that is identical to a region surrounding the structurally mature Hope fault of the Marlborough Fault System farther north. This is despite an order-of-magnitude difference in slip rate between the respective fault zones and considerable differences in the recurrence rate of large earthquakes. The magnitude-frequency distribution in the Hope fault region is in accord with the characteristic earthquake model, whereas the rate of large earthquakes in the PPAFZ is approximated (but over predicted) by the Gutenberg-Richter model. The comparison of these two fault zones demonstrates the importance of the structural maturity of the fault zone in relation to seismicity rates inferred from recent, historical, and paleoseismic data.

Audio, Radio New Zealand

As if the crumbling ceilings, broken sewage pipes and torn up roads weren't enough for the people of North Christchurch to deal with, now there's a new problem that may be caused by the September earthquake: Mosquitoes. Pines Beach and Kairaki residents say black clouds of mosquitoes are descending on them at dusk and dawn.

Images, Alexander Turnbull Library

A man sits in an armchair in the ruins of his house with his wife beside him. A man carrying a briefcase marked 'EQC' has come to make an insurance assessment and says 'Unfortunately, this is a North Canterbury collapse - so you'll only get your first $100,000 back'. Context; the Christchurch earthquake of 4th September and the collapse of the South Canterbury Finance Company. Quantity: 1 digital cartoon(s).

Audio, Radio New Zealand

Kaiapoi, just north of Christchurch, has unveiled a bold new plan for the parts of the town wiped off the map in the Canterbury earthquakes. The plan proposes having house boats on the river that runs through the town, there'll be a place for campervans to park up and a covered sports facility is on the cards.

Research papers, University of Canterbury Library

Structures of the Lowry Peaks Range - Waikari Valley district are complex. The majority comprise three members of a predominantly WSW -ENE striking major northwards-directed, leading edge imbricate thrust system, with associated angular, asymmetric fault-propagation folds. This system forms anomalously within a large NESW trending belt of structures characterising the entire east coast of north Canterbury, both onshore and offshore and terminates westwards against N-S striking, east facing fold-fault zone. The objectives of this study address the origin, geometry and kinematics of the interaction between these diversely trending systems. Stratigraphy and small-scale structures denote three periods of deformation, namely: i) Middle Cretaceous deformation of the basement rocks, ii) weak Middle Oligocene deformation associated with the inception of the plate boundary through the South Island, and iii) major Pliocene - Recent deformation that formed the majority of the above-mentioned structures. Stress tensor analyses within competent basement and limestone cover rocks suggest two sets of sub-horizontal compression, NE-SW and NW-SE, the former likely to relate to a localised earlier period of deformation, now overprinted by the latter. NW-SE oriented sub-horizontal compression correlates well with results from other parts of north Canterbury. The result of NW-SE compression on the W-E to WSW-ENE striking structures is a large component of oblique motion, which is manifest in four ways: i) movement on two, differently oriented splays rather than a single fault strand, ii) the development of a sinuous trace for a number of the major folds, whereby the ends are oriented normal to the compression direction, the centres parallel to the strike of the faults, iii) the development of a number of cross-folds, striking NNE-SSW and iv) the apparently recent development of a strike-slip component on at least one of the major thrust faults. The origin of the W-E, or WSW-ENE striking structures may be reactivation of Late Cretaceous faults, stratigraphic evidence for the existence of a "structural high" (the Hurunui High) over the majority of the area in the Late Cretaceous to Early Eocene times suggests the formation of a W-E trending horst structure, with a corresponding asymmetric graben to the south. The junction of WSW-ENE trending structures with N-S trending structures to the west centres on an alluvial-filled depression, Waikari Flat, into which the structures of the WSW-ENE trending imbricate thrust system plunge, locally curling to the SW at their ends to link with N-S trending structures to the south. Roof thrusting on two orientations, W-E and N-S, towards to SE is currently occurring above these structures. Currently the area is not highly seismically active, although a magnitude ~6.4 Ms earthquake in historic times has been recorded. The effects of tectonics on the drainage of the area does suggest that the majority of the systems, are still potentially active, albeit moving at a comparatively slow rate. The majority of the recent motion appears to be concentrated on the roof-thrusting occurring in Waikari Flat, and uplift along the Lowry Peaks Fault System. Increasing amounts of secondary movement on back-thrusts and cross fractures is also implied for western ends of the major imbricate thrust system. In contrast, the southern-most fault system appears to be largely sustaining dextral strike-slip motion, with some local folding in central portions.