Christchurch earthquake 2011 Flashcards
What date was the earthquake
22nd February 2011
Where did the earthquake occur/
Along the greendale fault
What type of fault is the greendale fault?
Strike slip/ conservative
What magnitude was the earthquake?
6.2
What was the depth?
5km
What areas were affected?
Christchurch
What was a unique feature for the earthquake?
2010 September earthquake with magnitude 5.1 occured just months before and christchurch was still recovering
What plates does New Zealand sit along?
Both the Australian and Pacific plates, which is a destructive plate margin with a subduction zone
Where is the Greendale fault located?
On the South Island of New Zealand and it has a strike slip motion
What caused the earthquake?
A rupture in the greendale fault
Why was liquefaction an issue?
400,000 tonnes of silt came to the surface and caused houses and cars to sink
How many aftershocks were there?
250+
What was the problem of mental wellbeing due to aftershocks?
People were much more on edge due to constant shaking
How many fatalities were there?
185
What percentage of fatalities occured in the central business district?
60%
Why were water pipes an issue?
Water pipes beneath the surface burst causing flooding which lead to liquefaction.
What were the economic primary effects of the earthquake?
Rationing of petrol, Cathedral severly damaged (loss of tourism), power outages, cathedral lost its spire
How many homes were destroyed?
10,000
What was the total estimated cost of damages?
40 billion
What measure was put in place in the CBD?
restricted movement
How many chemical toilets were provided for residents?
30,000
What is the Farmy Army?
Domestic help in the form of 800+ farmers using their machinery to help clear and rebuild areas.
How much money did Australia give to help restoration?
5 million dollars
Where was rescue from?
Japan, US, Australia and more
What did australian emergency service workers do?
600 helped in forms of police, search and rescue, medical and forensic efforts
How was Christchurch zoned?
Into 4 zones by the Canterbury primary response group
What were the long term responses?
Government provided temporary housing
Roads and houses cleared from silt by august
By August 80% of roads and 50% of footpaths were repaired
