Christchurch Easrthquake Essay

1277 words - 6 pages

A report On the Canterbury Earthquake 2011
This report will show the reader about which areas and buildings around the Canterbury region were critically damaged and inaccessible to the public during and after the earth quake which hit the Canterbury region and was felt beyond the region as well, it will split into two categories cultural and natural effects. I will also be referring to my “special analysis “data. Also in the report I will show you were the CDEM should be located in case of another serious natural disaster might occur.

The Canterbury Region, as shown in figure 1 is New Zealand largest region ranging to about 25,252 sq. km with a population of 462,783 (updated on ...view middle of the document...

Over half of the buildings in the central business district were demolished because the buildings were not prone to earthquakes due to the lack of strength of the material (stone) used for the infrastructure of the old buildings such as the Hotel grand chancellor, Christchurch cathedral etc. The total repair bill for the critically damaged buildings in the CBD was estimated to be more than $20 million. Another damaged building was Lyttelton port, as shown in figure 12. This is because the epicentre of the magnitude-6.3 earthquake was near Lyttelton at a depth of around 5km, according to google earth. The damage is bigger than Last September's earthquake which caused a lot of damage to the port, which moved 9.8 million tonnes of cargo in the year to June 30, 2010.

There were many natural effects that occurred after the Christchurch earthquake which was Liquefaction, as shown in figure 4 it was much more extensive than in the September 2010 earthquake. Eastern sections of Christchurch such as New Brighton, Sumner etc. were built on a former swamp. Shaking turned water-saturated layers of sand and silt beneath the surface into sludge that came upwards through the cracks. Also another natural effect was damage to the land such as the town of Bexley, as shown in figure is situated in the east of Christchurch on the west bank of the Avon River, approximately seven kilometres from the city centre and is very close to the epicentre where most of the shaking occurred due to the mass of energy released during the Earthquake. This area also includes parts of Aranui from Pages Road towards the coast. These two areas are very distinct. All of the land to the east of Bexley Road has been red zoned and is now largely vacant; however, the land to the west of Bexley Road is category three which means it is safe to stay around that area. In terms of land damage this area has been the worst affected in the city. Another place where there have been landslides were the Redcliffs, as shown in figure 5 which was probably the most dangerous effect because this landslide was located just behind Redcliffs school with about 400 children attending the primary and would have been a was a terrifying experience at the time, with the earthquake’s and aftershocks’ taking their toll because the epicentre being so close by creating Rock-fall, dust clouds and on-going tremors created a frightening atmosphere.. Other natural effects that occurred after the earthquake was rock falls like shag rock and Evans pass, as shown in figure 7and 6. However, successive earthquakes such as the Christchurch earthquake that happened in 2011 has taken their toll and this famous rock and...

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