Natural Hazards Keywords Flashcards
Secondary effects
Those that result from primary effects
Primary effects
Those resulting directly from the event itself
Tsunamis
Large ocean waves caused by underwater earthquakes
Richter scale
A measure of earthquake strength
Aftershocks
Smaller tremors occurring after an earthquake
Earth’s crust
The solid outer layer of the earth
Tectonic plates
Large segments of the earth’s crust
Mantle
The layer of the earth between the crust and the core
Magma
Liquid rock below the earth’s surface
Liquefaction
The loss of strength that can occur in the ground during an earthquake
Seismic activity
Movements in the earth’s crust
Laser ranging
Using laser beams and mirrors to detect minute changes in the shape of the land
Evacuation
Movement of people away from a place of danger to a place of safety
Storm surges
Abnormal rise of the sea along a shore as the result of a storm, sometimes called a tidal surge
Tropical
Situated in the area between the tropics of Cancer and Capricorn
Eye of a tropical storm
The calm, clear area at the centre of the tropical storm
Track of a tropical storm
The path taken by the tropical storm
Mandatory evacuation
An evacuation that is commanded by the authorities
Natural cycle
Series of events in the nature that repeated over and over again
El Niño
A warming of the ocean surface off the western coast of South America
Physical effects
Those affecting natural and built materials
Economic effects
Those affecting money and business
Drought
A long period with no or low levels of rainfall
Pulaski
A tool that is a cross between an axe and a hoe
Geographical information system
Electronic system used for storing, analysing, managing and presenting data which is linked to a location
Wildfire intensity
The severity of the burning
Wildfire season
The period of time that a wildfire is most likely to occur
NASA
National Aeronautics and Space Administration - the US space industry
Wild land urban interface
Area where houses and other developments are built in the fringes wilderness areas