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Earthquake hazards on Natural and Human systems - Coggle Diagram
Earthquake hazards
on Natural and Human systems
GROUND SHAKING
Human systems
Destroys properties and infrastructure
Disrupts services
Causes injuries and fatalities
Natural systems
Destroys ecosystems
SOIL LIQUEFACTION
Natural systems
Destroys ecosystems
Human systems
Disrupts services
Destroys properties and infrastructure
Cause injuries and fatalities
Liquefaction occurs when the violent ground shaking causes saturated, loose soil to lose it soil structure and transforms into a thick fluid
LANDSLIDES
Natural systems
Destroys ecosystems
Human systems
Disrupts services
Causes injuries and fatalities
Destroys properties and infrastructure
Landslides occur as the violent vibrations
Form cracks on steep slopes, loosening the rocks and soil
Trigger the loose rocks and soil to move downslope
TSUNAMI
Natural systems
Destroys ecosystems
Human systems
Disrupts services
Causes injuries and fatalities
Detroys properties and infrastructure
Tsunami occur when
A large volume of water is lifted, forming waves of great wavelength and low height of less than 1 meter
The waves travel towards land at high speeds around 800km/km
On approaching the coast, greater friction with the shallower seabed slows the wave down
An undersea earthquake causes the seabed to be displaced
The waves get closer together and increase in height. Waves can reach up to a height of 15m or more, travel at a speed of 30-50 km/h and devastates shorelines the waves hit
Before the tsunami occurs, the sea may reduce from the shore because the sea water fills in the void caused by the displacement of the seabed