The earthquake measured 6.3 on the Richter Scale and, at 4.99 km deep, was very shallow. Many old, historic buildings have been earthquake strengthened in the last 20 years. An earthquake create a hazard of collapsing buildings and falling objects, which are the greatest threats. In future, when people look back at the Christchurch earthquake of February 22, it will be the CTV building site on the corner of Madras and Cashel streets that will attract special horror. It is a known and accepted fact that buildings and earthquakes do not go hand in hand and terrible damage is caused in many instances. An earthquake measuring 5.8 on the Richter scale hit the Christchurch region just before 2 pm this afternoon and was followed just over an hour later by an bigger aftershock measured at 6.0, Geonet reports. In terms of magnitude, this was just a moderate earthquake, but the local effects on Christchurch have been huge because of… Cantabrians report via Twitter the quake was violent and caused power outages, cut phone lines and damaged buildings.. But most deaths occur on the coast closest to the epicenter. New buildings have to be strong enough to withstand a big earthquake. It survived the earthquake with no damage at all. Building damage avoidance is quite a simple concept, it is the materials used that cause the problems. (Tsunami models did an excellent job of predicting when the tsunami would hit Hawaii or California, hours after the earthquake.)
But poverty also plays its role, Mr Garratt explains, as it exacerbates a country's or region's vulnerability to such disasters.
The reason Christchurch suffers so much damage from liquefaction is because of the soil type and soil arrangement in the region. When Christchurch escaped a 7.1 magnitude earthquake six months ago without any deaths, residents were thankful that they had avoided a calamity. 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. Residents reported liquefaction in some suburbs. Christchurch Earthquake Case Study. So it is quite possible to survive. the Christchurch CBD district is built on liquefaction prone soil, making it at high risk of damage from liquefaction.
The Canterbury Television (CTV) building crumbled to the ground during the 6.1-magnitude earthquake that rocked Christchurch on Feb 22 … Earthquake resistance can and is, in many cases, built into the design of the building. The reason that there have been so many aftershocks after the 2010 Christchurch earthquake is because bigger earthquakes have not only stronger aftershocks, but more of them. The soil is considered susceptible to liquefaction and have a very low resistance to liquefaction. At least 65 people have died after a 6.3-magnitude earthquake struck Christchurch on New Zealand's South Island, Prime Minister John Key says, with fears that the toll will rise. The earthquake occurred along a conservative margin between the Pacific Plate and the Australasian Plate. The Civil Defence Headquarters during this emergency is the new Art Gallery, which has large panes of glass right along one side. Why shorter and taller buildings can react differently during the same earthquake is a matter of geology and physics — similar to how a wineglass can survive … In places such as Haiti, where 72.1% of the population live on less than $2 a day, and in cities like Port-au-Prince, where many are housed in poor and densely-packed shantytowns and badly-constructed buildings, the devastation is always expected to be greater. However, a combination of observations plus document-searching does provide some answers. A case study of an earthquake in a HIC.. What caused the Christchurch earthquake? The earthquake occurred at 12.51pm on 22nd February 2011.
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