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Earthquakes and tsunamis - EduqasEarthquakes: effects and responses

Earthquakes are caused by the release of built-up pressure at plate boundaries. They can destroy buildings and infrastructure. Tsunamis can also occur, with equally devastating and deadly effects.

Part of GeographyHazardous landscapes

Earthquakes: effects and responses

Effects

The effect is the damage which happens as a result of the earthquake. The effects of an earthquake can vary depending on:

  • The size of the earthquake on the Richter scale - the higher it is on the scale the more destruction it causes.
  • Level of development - whether it occurs in a rich or a poor country. Richer countries will be more likely to be able to predict, and attempt to protect and prepare themselves from the effects of an earthquake.
  • The depth of the focus - if its shallow it can be more destructive.
  • Distance from epicentre - the effects of an earthquake are more severe at its centre.
  • Population density - the more people living in an area, the more likely to be more deaths and casualties.
  • The time of day - whether people are in their homes, at work or travelling.

Responses

Responses are how countries react to an earthquake. They are categorised as follows:

  • Short-term or immediate - a response in the hours, days and weeks immediately after a disaster has happened. Short-term responses mainly involve search and rescue and helping the injured.
  • Long-term - responses that go on for months and years after a disaster. They can involve rebuilding destroyed houses, schools, hospitals, etc. They also involve kick-starting the local economy.