Christchurch

Question 1

What magnitude was the earthquake?

Answer 1

6.3

Question 2

How far away from the central business district was the epicentre?

Answer 2

5km

Question 3

What was this earthquake called?

Answer 3

The lyttleton aftershock

Question 4

What was this earthquake an aftershock of?

Answer 4

The September 2010 earthquake

Question 5

Which way did the buried fault run through the city?

Answer 5

East-west

Question 6

What are 4 factors affecting the impacts?

Answer 6

-close proximity of the epicentre 6km
-loose sediment resting on harder rocks
-slapdown interaction between subsurface layers under the city
-liquefaction

Question 7

What are 3 short term effects of the earthquake ?

Answer 7

-death toll 155
-nearly 7k treated for injuries
-city centre 1000 buildings collapsed/ demolished as dangerous

Question 8

How shallow was the epicentre?

Answer 8

5km

Question 9

What time of day did the earthquake occur?why was this a problem?

Answer 9

Lunchtime on a week day
An issue as the CBD was busy

Question 10

How much silt was upwelled in the earthquake?

Answer 10

Over 200,000 tonnes

Question 11

Why was the increased liquefaction an issue?

Answer 11

-caused significant ground movement
-undermine many foundations
-destroyed infrastructure

Question 12

What % of the water and sewage system was destroyed?

Answer 12

80%

Question 13

When did this earthquake take place?

Answer 13

February 2011