Natural Hazards Keywords Flashcards
Primary effects
Effects resulting directly from an event.
Secondary effect
Effects that result from a primary effect.
Tsunamis
Large ocean waves caused by an underwater earthquake.
Richter scale
The scale used to measure the strength of an earthquake.
Aftershocks
Smaller tremors which happen 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 happen in the ground during the earthquake shaking.
Retrofitting
The addition of new technology to older buildings.
Epicentre
The point of the Earth’s surface directly above the focus of an earthquake.
Building code
Regulations which state how a building should be built in order for it to be safe.
Seismic activity
Movement in the Earth’s crust.
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
The calm, clear area at the centre of a tropical storm.
TRS - Tropical Revolving Storm
Hurricanes, typhoons or cyclones.
Track
The path taken by a tropical storm.
Mandatory evacuation
An evacuation that is ordered by authorities or the government.
Natural cycle
Series of events in nature that are repeated over and over again.
Physical effects
Those affecting natural and built materials.
Social effects
Those affecting people.
Economic effects
Those affecting money and business.
