Hazard Distributions
- Created by: FraserHarold
- Created on: 06-05-14 17:02
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- Hazard Distributions
- Geophysical Hazards
- Often occur at tectonic plate boundaries
- Where continental and oceanic plates meet
- At constructive, destructive, conservative boundaries
- Where continental and oceanic plates meet
- Earthquakes
- Constructive
- Fault lines created when a plate moves in a non-uniform way
- Pressure built up, earthquakes occur at crack
- Fault lines created when a plate moves in a non-uniform way
- Destructive
- Less dense plate being subducted
- Get stuck on each other building pressure
- Release of pressure causes earthquake
- Get stuck on each other building pressure
- Less dense plate being subducted
- Conservative
- Two plates sliding past get stuck
- Pressure builds, when released, earthquake occurs
- Two plates sliding past get stuck
- Constructive
- Volcanoes
- Constructive
- Mantle melts to magma as plates separate
- Magma rises, erupting as volcano
- Mantle melts to magma as plates separate
- Destructive
- Magma created by oceanic melting rises through continental
- Constructive
- Landslides / Avalanches
- Occur mainly at mountainous areas, after heavy rainfall or seismic activity
- Often occur at tectonic plate boundaries
- Hydro-meteorological Hazards
- Tropical Cyclones
- Between 5-20 degrees N/S of equator
- Coriolis effect very weak on equator
- Not enough spin created
- Coriolis effect very weak on equator
- Only over warm water (26 degrees)
- At least 70m depths
- Between 5-20 degrees N/S of equator
- Floods
- Excessive rainfall and intense storms
- El Nino and La Nina
- 33% of world's area
- i.e. 80% of population
- Droughts
- Affects over 33% of world area
- Including 70% of population
- Affects over 33% of world area
- Tropical Cyclones
- Disaster Hotspots
- Vulnerable places at risk of two or more hazards
- California
- Philippines
- Vulnerable places at risk of two or more hazards
- Geophysical Hazards
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