christchurch earthquake

Question 1

what date was the main earhtquake in christchurch

Answer 1

22 feb 2011

Question 2

what plate boundary was searthquake on

Answer 2

indo australian and pacific plate boundary

Question 3

what caused earthquake

Answer 3

strike slip motion on alpine fault

fault unzipped form west to east

Question 4

why was it hard to predict earthquake

Answer 4

didnt know fault was there and

Question 5

what scale was earthquake

Answer 5

6.3 richter scale

Question 6

how deep was focus

Answer 6

5km

Question 7

where was epicentre

Answer 7

5km south east of CBD

Question 8

what caused the most damage

Answer 8

aftershocks

Question 9

how does seismic lensing occur

Answer 9

hard rock on southern alpes and peninsula caused seismic waves to be reflected back

Question 10

what increased shaking in the city

Answer 10

city built on unconsolidated rock

Question 11

why was infastructure good and bad

Answer 11

bad = facades made of brick so easily collapsed due to being rigid

good = rest of structures built of wood which flex and bent so withstood the shaking

Question 12

how many people died

Answer 12

166

Question 13

what was major cause of damage to buildings

Answer 13

sesimic lensing

Question 14

how many died due to landslides

Answer 14

5 in port hills region

Question 15

how many evacuation due to landslides

Answer 15

100’s of houses evacuated

Question 16

what did flooding cause 2 things

Answer 16

water mains burst and saturated land brought water table close to sunken surface

Question 17

what caused building to collapse and sink

Answer 17

liquefaction

Question 18

what is e suburbs built on

Answer 18

400k tonnes of silt

Question 19

how many aftershocks after inital

Answer 19

200,000

Question 20

how many properties were damaged

Answer 20

100,000

Question 21

what was cost of hazard

Answer 21

28bn

Question 22

what percentage of increase occured in construction servives

Answer 22

59 percent

Question 23

schools closed

Answer 23

yes

Question 24

how much of cbd destroyed percentage

Answer 24

50 percent

Question 25

how big was insurance clain

Answer 25

80bn

Question 26

how much did suicide rates increase by

Answer 26

5 times

Question 27

what percentage of people moved out of city

Answer 27

20 percent

Question 28

what percentgae of people disagreed with governemnt recovery priorities

Answer 28

75 percent

Question 29

how did they respond medically

Answer 29

built makeshift hospitals and used air ambulance

Question 30

why was gas shutoff

Answer 30

to prevent gas explosions and fires

Question 31

how was information passed on

Answer 31

through social media

Question 32

why was airport left open

Answer 32

for aid, military and volunteers to access area

Question 33

how many austarlian police came over

Answer 33

300

Question 34

how much aid was given

Answer 34

6-7 million

Question 35

what percentage of houses now have earthquake insurance

Answer 35

98 percent

Question 36

what was other reason for air port reopening to public

Answer 36

boost tourism and rebuild economy

Question 37

what were the new building regs

Answer 37

hazard map zoning to prevent houses at risk of more liquefaction

Question 38

why was cera formed (christchurch earthquake recovery centre)

Answer 38

to suspend laws and regulations during earthquake recovery

Question 39

how many people live in christchurch

Answer 39

300,000 /400,000

Question 40

how many people left city temporarily

Answer 40

70,000