Plate Tectonics- Earthquakes

Question 1

What magnitude was the 4th September 2010 NZ earthquake?

Answer 1

7.1

Question 2

What magnitude was the 22nd February 2011 NZ earthquake?

Answer 2

6.6

Question 3

Why did the 22nd Feb earthquake cause more damage to Christchurch?

Answer 3

just 10km SE of the city and 5km deep

Question 4

When did Feb quake strike Christchurch? NZ

Answer 4

12.51- lunch time people in offices in the CBD

Question 5

How many people died? NZ

Answer 5

185

Question 6

What was the estimated cost of the quake? NZ

Answer 6

$40 billion

Question 7

What was the main secondary effect and why? NZ

Answer 7

Soil Liquefaction causing 400,000 tonnes of silt to be produced because the city is built on alluvial sediment which is very unstable.

Question 8

How many buildings were damaged? NZ

Answer 8

100,000

Question 9

Name three secondary effects of the earthquake? NZ

Answer 9

80% of people said there lives had been changed significantly by the earthquake.
1/3 said the earthquakes had caused financial problems.
Divorce problems 261 per 1000 couples divorces. 1/4

Question 10

How many people left Christchurch?

Answer 10

70,000 with smaller towns swelling by 20% and Christchurch going into decline.

Question 11

What were the short term responses in NZ?

Answer 11

National Crisis Management Centre activated
National Emergency declared
Rescue crews from all over the world came into force
Australia gave $5 million in aid
30,000 chemical toilets provided
Electricity restored in 3 days