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Tectonic Hazards



Tectonic plates

Inner core ­ Ball of solid iron and nickel
Outer core ­ Liquid
Mantle ­ Around core, semi ­ molten rock which moves slowly
Crust ­ Outer layer of Earth (very thin)

Continental crust:

Thicker than oceanic but less dense

Oceanic crust:

Thinner than continental but…

Page 2

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Shockwaves spread out from focus
Epicentre ­ shockwaves are stronger and cause more damage
Magnitude of EQ is measured with Richter Scale

Impacts of Earthquakes

Primary:

Buildings collapsing
People being injured/killing
Road, railways and airport damaged
Electricity cables are damaged
Gas pipes ­ leak
Sewage pipes broken ­ leaks

Secondary:…

Page 3

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Destructive:

Oceanic plate moves down into the mantle ­ melted and destroyed
Magma is formed which rises through vents in crust and it erupts onto surface

Constructive:

Magma rises into the gap created by the plates moving away from each other

Impacts of Volcanoes

Primary:

Buildings and roads destroyed
People…

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