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Earthquake hazard.
Earthquake activity is not randomly nor evenly distributed around the globe. ... Small blue dots represent the epicentres of tremors below ~ 6 on the Richter Scale of earthquake magnitude, and red stars represent tremors above ~ 6 on the Richter Scale. ...
Friction along edges of plates creates an earthquake zone. X’s mark possible earthquake foci. ... Since P waves travel faster than S waves they are the first to be felt during an earthquake. ... This feature is used to good effect in determining the ‘epicentre’ of an earthquake. ...
The magnitude of an earthquake is a measure of the amount of energy released. ... The Mecalli Scale is no longer considered relevant since:
· A single earthquake is capable of causing a wide range of damage. ...
The Richter Scale of earthquake magnitude is now the accepted standard. Measurements of tremors made during an earthquake allow seismologists to calculate the total amount of energy released during an event. ... The largest earthquake ever recorded had a magnitude of approximately 8. ... The intensity of an earthquake at a specific location depends on a number of factors. Most important among these are (1) the magnitude of the earthquake, (2) the distance from the epicentre, and (3) the type of rock and degree of consolidation. ...
The ground motion during an earthquake can cause dams, buildings and tunnels to collapse. ... In one case a popular lake in New Zealand was rendered unusable after an earthquake tilted its bed and caused it to drain completely dry. ...
The consequences of an earthquake are closely related to the levels of development of the affected populations. Consider the effects of an earthquake on a vulnerable population, and the effects of a similar earthquake on a less vulnerable population; obviously the more vulnerable population will suffer more. ...
Earthquake disasters are more the result of human failings than natural events.
Approximate Word count = 1571
Approximate Pages = 6.3
(250 words per page double spaced)
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