Types Of Hazards Flashcards
Define a hazard.
A hazard is an event which has the potential to cause harm to the environment, people or the economy.
Define a natural hazard.
A natural hazard is an event caused by environmental processes.
Define a disaster.
A disaster occurs when harm actually occurs to the environment, people or economy.
What natural hazards are caused by tectonic and geological reasons?
Earthquakes.
Volcanic eruption.
Landslides
Tsunamis.
What natural hazards are caused by climatic and meteorological reasons?
Storms
Floods
Droughts
Tornadoes
What other ways can natural hazards be categorised?
Magnitude
Frequency
Size
Duration
Location
What does magnitude of the event mean?
The power/strength
What are tropical cyclones?
Tropical cyclones are rotating, low pressure systems. They are known as hurricanes, cyclones and typhoons.
What are the characteristics of tropical cyclones?
Heavy rainfall
High wind speeds over 119 kmph
High waves and storm surges.
What is the magnitude of tropical cyclones measured on?
Saffir-Simpson Scale
Where do tropical cyclones develop?
In tropical regions between 5° and 30° north and south of the equator.
What are plate boundaries.
The place where tectonic plates meet.
What is the epicentre of an earthquake?
The point on the earth’s surface directly above the focus.
What is the focus of an earthquake?
The point at which the earthquake starts below the earth’s surface.
What is the damage caused by earthquakes measured on?
Moment Magnitude Scale.
