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Earthquakes

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by

Miss Cummins

on 27 September 2015

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Transcript of Earthquakes

Study of earthquakes
Many earthquakes along this fault line in the US
Fewer deaths occur when an earthquake strikes during the night
Damage is always worse in poor countries
Diagram of an earthquake
San Andreas Fault Line
Seismology

Seismologist
- a person who studies earthquakes

Seismograph
- instrument which measures the tremors

Richter scale
- used to show strength of an earthquake - measures from 1 to 12 - each unit 10 times stronger than last
1I - Geography
2015
Ms. Cummins
What are earthquakes?
Take 3 minutes to think about this - write down your thoughts
Damage caused by earthquakes
Earthquakes
Sudden
tremors
or
vibrations
in Earth's crust
Plates
collide

Build up of pressure - fault line
Sudden release of
energy
- earthquake

Famous fault line -
San Andreas
fault line
Focus
- point below the surface
Tremor
- vibrations from plates colliding
Epicentre
- focus point on surface (tremors are strongest here)
Fault line
- where the two plactes are colliding or sliding past
How to reduce the damage caused by earthquake
Build
earthquake-resistant buildings
near earthquake zones


Study
patterns
of past earthquakes to
predict
when next one might occur
Most powerful earthquake to hit Japan was in 2011
Case Study - Japan
11th March 2011

8.9 on Richter scale

Triggered a powerful tsunami (40m high)

130,000 buildings collapsed
1 million homes damaged
15,000 dead and 4.4 million without electricity/water

Damaged a nuclear power plant

Cost of the quake - €200 billion (most expensive in history
Full transcript