Liquefaction happens when underground water in the soil comes to the surfac… 185 people from more than 20 countries died in the earthquake. Christchurch Hospital was evacuated due to damage in some areas, but soon reopened to treat the injured. Clearly it suffered immediate damage, but it was only some hours later that it began to tilt. Where the shaking or ground movement was severe, then houses on piles seemed to fare  somewhat better than those on concrete pads. I do not know who the architects were for the original construction but the engineers were Holmes Wood Poole and Johnstone. Of the 185 victims, 115 people died in the Canterbury Television building alone, while another 18 died in the collapse of PGC House, and eight were killed when masonry fell on Red Bus number 702 in Colombo Street. Maurice Lamontagne, a seismologist at the Geological Survey of Canada, said: "What surprised me most was not seeing the damage to masonry buildings like the cathedral's bell-tower but to see new concrete buildings crumbling down. It failed to attract tenants as I recall and was retro fitted as an hotel in the early 1990s. Change ), You are commenting using your Facebook account. Thirty-nine people lost their lives when unreinforced Civil defence declared a category 3 emergency, … The September quake had occurred in the early hours of the morning with family generally close at hand. It was originally a carpark building. If you have an earthquake that has a 90% chance of not being exceeded in 50 years, the authorities might say that's an acceptable risk, we can live with that. An a… This building is adjacent to the Avon River in  Cambridge Terrace. ", Damp sediments under Christchurch made tremor more violent, Survivors are taken from a modern building damaged by Tuesday's earthquake in Christchurch. "But even if they'd known about the fault, they wouldn't have been sure it would produce such strong shaking, so they might have still underestimated what actually occurred. It was been done at the time when the Americas Cup parade was held in CHCH. On 22 February 2011, at 12:51 pm, Christchurch was struck by a magnitude 6.3 earthquake. Debbie Jarvis Perhaps the ground acceleration went beyond the design capacity, as there is no doubt the ground acceleration was extreme. Change ). It is of the liquefaction on Kilmore St, and am planning to use it as the background. Print this … "It's clear that the New Zealanders rather underestimated the shaking that Christchurch could sustain," said Roger Musson, a seismologist at the British Geological Survey. It was with surprise that the Drainage Board/PGC which collapsed onto the first floor, did not collapse completely. This is the building where most of the deaths occurred, perhaps as many as a hundred or even more, including most of the foreign deaths at the Kings Language School. Christchurch Earthquake Its is the energy being moved through the rock like a whale song in the ocean. Hundreds of houses were destroyed, including the Christchurch Cathedral, and damages will probably sum up to some billion dollars. New Zealand is apart of the Pacific Ring of Fire. I have also looked with wonder at the simplicity of house construction in Uruguay, where earthquakes are essentially unknown. Anywhere adjacent to a current or former spring was at risk. Earthquake resistance can and is, in many cases, built into the design of the building. The critical issue with this earthquake was that the epicentre was at shallow depth under Christchurch, so many people were within 10 to 20 kilometres (6 to 12 miles) of the fault rupture. "You can't protect against everything, because it's simply too expensive. On Tuesday 22 February 2011 at 12.51 p.m. Christchurch was badly damaged by a magnitude 6.3 earthquake, which killed 185 people and injured several thousand. That means it pre-dated the first earthquake design requirements of the 1965 code. Hi Keith, Developers, councils and engineers do some great work, no argument there, but when you see something like the Grand Chancellor and the Ferrymead towers go ahead you really do wonder how they (the designer) can even think it looks good, surely they cannot be proud of those buildings, they are just damn ugly. Because the ground loses its rigidity, buildings can be shaken far more violently. ", He added: "Experts have been surprised that the town itself has been hit.". Damage to buried pipes allowed sewage to enter the water so people had to boil their tap water. Modern design is not supposed to mean there will be no damage, but it is meant to prevent catastrophic failure that causes death. These are just three of many photos taken by Asher, who jumped on his bike and took some amazing photos around the city in the immediate aftermath. A big unknown is how many of the modern buildings that apparently survived will still have to be pulled down. Why and how did China markets become so important for New Zealand? Christchurch 22nd Feburary Earthquake New Zealand is prone to earthquakes because its situated between two major plates. It may have been 1979.] Semi official reports coming through are suggesting more than  500 buildings in the CBD will have to go. I liken it to an undergound tsunami, that travelled through the aquifer from the epicentre, and then burst upwards as it hit the underlying rocks of the Port Hills. Whether or not PGC were actually the building owners in 2011, or simply the major tenants with naming rights, is not clear to me. Some buildings caught fire after the February earthquake. As for the brick chimneys on the older wooden houses, well they descended ungracefully to the ground. Some places that escaped liquefaction last time have received it this time, and vice versa. Ha, fatty. Government’s food and fibre reset report lacks a core, Quantitative easing floods capital markets, The ongoing search for new markets – India and beyond, Rugby’s role in a greater South Pacific strategic reset, A1 milk predisposes to asthma and lung inflammation, COVID-19 scenarios are becoming increasingly evident, COVID-19 is a science of uncertainty and an art of probability, North-East Asian markets as alternatives to China. Fill in your details below or click an icon to log in: You are commenting using your WordPress.com account. As the plates move they cause earthquakes and causing a lot of damage. Kind regards The September 2010, February 2011 and June 2011 earthquakes did not cause tsunamis because they happened on land and did not disrupt the sea floor. Same conditions – credit to photographer/website. Unfortunately, the Arts Centre, which was built from 1877 onwards, suffered some The building is many hundreds of metres from the Avon River on the corner of Cashel and Madras Streets. The codes were further strengthened in 1976 with the concept of ‘controlled failure’, and strengthened again in 1984 and 1992. Each day over the last five months, as I have driven to work, I have looked with wonder at a multi-million-dollar modern home owned by a well-known sporting identity, which looks normal from the road but is going to be pulled down for exactly this reason. It seems that we do indeed have very stringent building codes in New Zealand. When the earthquake gets very severe - as in the February 22, 2011, Christchurch earthquake, everything is damaged to some extent. The messages from the 7.1 ‘dress rehearsal’  earthquake on September 2010 seemed reasonably straightforward. However,  a combination of observations plus document-searching does provide some answers. Buildings have collapsed around Cathedral Square in downtown Christchurch. The devastation in  the CBD includes modern buildings built from the 1960s to the 1990s that were untouched by the larger but not so close 7.1 September dress rehearsal. This core is still visible in the ‘after’ photo. There are many puzzles as to why some of Christchurch's buildings have survived the 6.3 earthquake of February 2011, and others have not. Also, both  in September 2010 and again in February 2011, there has been some liquefaction in areas previously identified as low risk. The earthquake struck the Canterbury region in New Zealand's South Island and was centred 6.7 kilometres (4.2 mi) south-east of the centre of Christchurch, New Zealand's second-most populous city. A significant amount of drilling of holes both in the concrete walls and floors was done. At least over my side of town (Halswell),  I saw evidence in the 7.1 September earthquake of a powerful wave. Is the Mycoplasma bovis eradication campaign on track? This was the second major earthquake to hit the city; the previous quake occurred on 4 September 2010 and registered at a 7.1 magnitude. [Update of 1 March: there are conflicting reports as to the date of construction. I had always thought before the quakes, that the columns in the ground floor holding up everything in the floors above above were an inherent weakness. Water pipes, roads, bridges, power lines, cell phone towers and ordinary phone lines were broken or damaged. Officials will now inspect buildings and draw up an inventory of damage. What caused the Christchurch earthquake? Hi, with regard to the Grand Chancellor building it should never have been built. Photograph: Christchurch Press/Reuters. And a lot of those that may be livable in the short-term, are still incapable of being permanently repaired. In Christchurch we have been very attached to our heritage buildings, but now it is time to move forward and rebuild from the ground up. ( Log Out /  What is clear is that people on the upper floors had the best chance of escape, with many of those on the lower floors being crushed by the collapse of heavy concrete floors. ( Log Out /  The Christchurch building inspectors made multiple visits at key times to our New Zealand home, particularly when the foundations were being laid. The collapse of the cathedral is less surprising. Commentary on agriculture, rural development, and wider issues. The earthquake damage to modern buildings in Christchurch caught many experts by surprise and suggests the city was more prone to destructive tremors than … And in the days after the earthquake, it was the Japanese media who were the most persistent in asking why the building failed as it did and killed so many… As per Meagan above, I’m also requesting permission to use the same photo, to appear in NZ Rodder magazine. It has treated over 220 serious injuries so far, even though sometimes they were working by torchlight. Asked by Wiki User 0 1 2 Answer Top Answer Wiki User Answered 2012-05-07 03:09:14 2012-05-07 03:09:14 Because you're fat. Hopefully in future Christchurch will see a much better standard of design, something with more creative flare, and a big step away from brutalism. At 12.51 p.m. on Tuesday 22 February 2011, a magnitude 6.3 earthquake caused severe damage in Christchurch and Lyttelton, killing 185 people and injuring several thousand. Grand Chancellor Hotel with earthquake damage and tilting at 2 degrees. The real truth will never be revealed it’s just too embarrasing, but speak to any builder that was not involved in the Grand Chancellor and if they are willing they will tell you that it was always a disaster waiting to happen. Across the suburb, the silt and sand laden water continued to flow from some of the boils for several hours afterwards. A reason to why there was so much damage done was because that the land, infrastructure and roads were still either damaged or weak due to the 2010 Christchurch earthquake which had a magnitude of 7.1. many building which Over half of the deaths occurred in the six-storey Canterbury Television (CTV) Building, which collapsed and caught fire in the earthquake. Why Was New Zealand's Latest Earthquake So Deadly? (Photo credits: The first three photos in this post come from Asher Trafford. "When shaken, these sediments transform into a liquid, causing irregular settlement of the ground, which is extremely damaging to buildings and buried structures, like water lines.". As for the low-lying eastern suburbs, here too it won’t be until the engineers’ reports are available that the real picture will emerge. The December 2011 and February 2016 earthquakes were off the coast, in Pegasus Bay, but the movement on the earthquake … "Liquefaction is a huge problem in Christchurch because the city is built on an alluvial plain, on sediments that are vulnerable to liquefaction," Clague said. Originally this was known as the ‘Drainage Board Building’. I would credit both you and your website. Most of these buildings had no damage or only a little. Presumably it was built to the latest codes so as to absorb the energy without suffering structural failure. Impacts of Christchurch Earthquake In total, the 'rehabilitation' costs $15.1 billion dollars worth of damage, Many businesses needed to fire employees due to the heavy re-building fee. Christchurch Earthquake The reason Christchurch suffers so much damage from liquefaction is because of the soil type and soil arrangement in the region. The earthquake occurred on New Zealand’s South Island, 10km west of Christchurch, at 12.51pm on 22nd February 2011 and lasted just 10 seconds. It is in Cashel St, several hundred metres from the Avon River. Other earthquakes have resulted in far bigger death tolls, not least the Japanese earthquake and tsunami just 20 days later. Other photos are sourced from Google and are currently uncredited.). This provides a reminder that the Christchurch earthquake really was a local event: short, sharp and vicious. This building looks heavy but with light structural support in the corners. Yet only a few km away there is no damage. 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Many old, historic buildings have been earthquake strengthened in the last 20 years. The liquefaction on these soils is much greater than  in September, and initial reports are of up to 150,000 tonnes of sand and silt needing to be removed, compared to about 30,000 tonnes last September. Maybe the wonder is that more modern buildings have not collapsed, and perhaps we should give due credit for that. It was the middle of a working day and many people were at school or work, having lunch or running errands. The Christchurch Earthquake: tectonic plates and fault lines, Understanding the Christchurch earthquake: building damage, http://ecan.govt.nz/publications/General/solid-facts-christchurch-liquefaction.pdf, » Blog Archive » Christchurch earthquake aftermath, YEAR 5 SCIENCE PROJECT-FINAL | YEAR 5 SCIENCE PROJECT, Regenerative agriculture is not redundant but can be misguided, It’s time for Fonterra to define the new path ahead, Agriculture will change but pastoral agriculture will survive and prosper, Green-lipped mussels are becoming heavy lifters, Composting mootels can transform dairy, but only if we get things right, Fonterra stabilises finances with back to basics model, selling assets and retaining profits, Coronavirus border policies need a deeper rethink, Green vegetables grow at the feet of big mountains, Big win for Fonterra from latest DIRA amendments, A resource-based perspective on immigration, Is regenerative agriculture the real deal. A lot will depend on whether the concrete pads have shifted, cracked, and tilted. There is a somewhat historical  (probably about 1999) but generally informative assessment of the liquefaction risks in Christchurch at http://ecan.govt.nz/publications/General/solid-facts-christchurch-liquefaction.pdf  However, I think that if they were to write this document again it would say some things differently. The 6.3 magnitude earthquake that struck Christchurch this morning was considerably less powerful than the 7.1 magnitude shake that hit last September, and yet it … Although Lincoln Uni does remain closed, that is because many staff and students live in the city. The codes focus on the standards that have to be met, rather than specifying precise building procedures. However, on the western hills, where I live, the form of cladding seems relevant. However, in Christchurch we also have many old buildings which predate these regulations. But the 2011 Christchurch quake, … The New Zealand defence forces have been called in to help move people out of the central business district.Fires were reported at the Canterbury Television (CTV) … The Grand Chancellor hotel was originally constructed in the mid 1980s as an office tower. Part of the answer is that the Japanese had become complacent about tsunamis and over-confident about the measures supposedly in place to protect them. This time it was often colleagues, classmates or complete strangers who comforted and hel… In my Uni office, and in sharp contrast to the September earthquake, there is not one paper or book that has moved. In any case, the Uni itself is being used as a base for rescue personnel. the frequency can be so low that you cant hear it, but your dog or your cat may hear it and freak out before the earthquake hits. I am preparing a report on the Christchurch earthquake for Rotary Down Under magazine and I’m wondering if I might have permission to publish your image of Liquefaction on Kilmore St? Several aftershocks were reported, some registering at a 5.6 magnitude. The earthquake epicentre was near Lyttelton, just 10 In other words , they were built for strength, but with rigidity rather than the flexibility needed to  absorb the energy of a huge quake. The original building codes go back to 1935, but earthquake design really only started in 1965. It is the stringent New Zealand building codes that make house building so expensive in this country. Having planned the building of a new house both in Australia (in the 1980s) and in New Zealand ( in 2001), I know that the building code is a lot stronger here in  New Zealand than in Australia. 0 1 2 … Beaches and waterways were polluted for many … Advance Publishing Ltd, Pingback: » Blog Archive » Christchurch earthquake aftermath. At least up until the mid 1980s, the designs were non-ductile. There are many puzzles as to why some of Christchurch’s  buildings have survived the 6.3  earthquake of February 2011, and others have not. Pingback: YEAR 5 SCIENCE PROJECT-FINAL | YEAR 5 SCIENCE PROJECT. Liquefaction on Kilmore St ( Asher Trafford), Liquefaction in park off Colombo St (Asher Trafford). Enter your email address to follow this blog and receive notifications of new posts by email. Houses with modern timber structural framing  also stood up particularly well. Most of the houses have timber framing and this has stood up well. Post was not sent - check your email addresses! So there are many potential ways to create safer buildings that will ride out an earthquake and remain fit for use – and Geoff says many of these will be visible in new buildings around Christchurch, especially those on Cambridge

why did so many buildings survive the christchurch earthquake 2011

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