11.3.3

Case Study: Christchurch, New Zealand Earthquake

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Earthquake Case Study - Christchurch, New Zealand

Two earthquakes hit the city of Christchurch, on New Zealand's south-east coast, in late 2010/early 2011. The second one hit the city centre, killing 185 and destroying much of the CBD.

1st earthquake (4/9/10)

1st earthquake (4/9/10)

  • Magnitude 7.1.
  • Struck at 4.35am on a Saturday.
    • People were asleep and the streets mostly empty.
  • Buildings were weakened, which became an issue in the 2nd earthquake.
  • More education about earthquake safety was encouraged as a response.
    • E.g. 'Turtle safe' - an earthquake safety resource aimed at preschool children which encourages them to act like a turtle during an earthquake.
2nd earthquake (22/2/11) facts

2nd earthquake (22/2/11) facts

  • Magnitude 6.3, hit closer to the CBD than the first earthquake.
  • Hit at 12.51pm on a Tuesday.
    • Thousands of people were out and about at work and school.
    • The city centre was busy.
  • There were 185 deaths and 1000's of injuries.
    • 130 deaths caused by the collapsing of the Canterbury TV and Pyne Gould Corporation buildings.
2nd earthquake damage

2nd earthquake damage

  • The Provincial Council Chambers and the Anglican Christchurch Cathedral were completely destroyed.
  • Over half of the buildings in the central business district have been (intentionally) demolished since as they were no longer safe, including the Hotel Grand Chancellor.
  • Liquefaction sludge moved upwards through cracks in residential streets.
  • Water and sewage from broken pipes flooded the streets.
  • Several thousand homes in the 'red zone' were demolished because they could no longer be safely inhabited.
2nd earthquake responses

2nd earthquake responses

  • State of emergency declared by national government on 23rd February.
  • Christchurch's CBD was cordoned off until June 2013 in some locations.
  • 75% of power reinstated within 96 hours.
  • Local residents and the creative community have been taking over the 'empty spaces' in the CBD with art installations and street art.
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Climate Change

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Urbanisation

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