People respond to seismic hazards Flashcards

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1
Q

What is an example of an earthquake?

A

Christchurch, New Zealand

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2
Q

When did Christchurch take place?

A

2010

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3
Q

What was the magnitude of Christchurch?

A

7.1 MMS

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4
Q

What is the risk and vulnerability of Christchurch?

A

New Zealand is an EQ prone country as it lies on the ‘Pacific Ring of Fire’

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5
Q

How many earthquakes does New Zealand experience per year?

A

20,000

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6
Q

How many of the 20,000 earthquakes New Zealand experience per year are actually felt?

A

200

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7
Q

What was the death toll of Christchurch?

A

185, of whom 115 were in Canterbury Television building which collapsed then caught fire

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8
Q

How many building collapsed in the centre of Christchurch?

A

1,000

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9
Q

What did the suburbs of Christchurch experience?

A

Widespread soil liquefaction

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10
Q

Why was there a 3m tsunami during Christchurch?

A

Ice was dislodged from the Tasman glacier and fell into Lake Tasman

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11
Q

How much did the overall cost of Christchurch earthquake come too?

A

$40 billion NZ

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12
Q

What are the four methods of earthquake prediction?

A

Probability mapping
Radon gas levels
Animal behaviour

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13
Q

How can one predict earthquakes through probability mapping?

A

Identify where the fault lines are, then study previous earthquake activity in the area indicating how frequent the earthquakes have been along fault lines

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14
Q

How can one predict earthquakes through Radon Gas levels?

A

Discharged from rock masses prior to earthquakes, an increased concentration in radon gives signs of EQ

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15
Q

How can one predict earthquakes through animal behaviour?

A

Animals are said to sense an earthquake hazard before its taken place

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