People respond to seismic hazards Flashcards
What is an example of an earthquake?
Christchurch, New Zealand
When did Christchurch take place?
2010
What was the magnitude of Christchurch?
7.1 MMS
What is the risk and vulnerability of Christchurch?
New Zealand is an EQ prone country as it lies on the ‘Pacific Ring of Fire’
How many earthquakes does New Zealand experience per year?
20,000
How many of the 20,000 earthquakes New Zealand experience per year are actually felt?
200
What was the death toll of Christchurch?
185, of whom 115 were in Canterbury Television building which collapsed then caught fire
How many building collapsed in the centre of Christchurch?
1,000
What did the suburbs of Christchurch experience?
Widespread soil liquefaction
Why was there a 3m tsunami during Christchurch?
Ice was dislodged from the Tasman glacier and fell into Lake Tasman
How much did the overall cost of Christchurch earthquake come too?
$40 billion NZ
What are the four methods of earthquake prediction?
Probability mapping
Radon gas levels
Animal behaviour
How can one predict earthquakes through probability mapping?
Identify where the fault lines are, then study previous earthquake activity in the area indicating how frequent the earthquakes have been along fault lines
How can one predict earthquakes through Radon Gas levels?
Discharged from rock masses prior to earthquakes, an increased concentration in radon gives signs of EQ
How can one predict earthquakes through animal behaviour?
Animals are said to sense an earthquake hazard before its taken place
