Earthquakes

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1. How and where earthquakes occur.
2. The relationship between earthquakes and tectonic forces.

3. Measuring and predicting earthquakes.

4. How earthquakes and tsunamis affect people and settlements – differences in vulnerability.

Earthquakes in the First World:

Earthquakes in the Third World (Beware – graphic!):

Tsunamis:

A very large ocean wave that is caused by an underwater earthquake or volcanic eruption and often causes extreme destruction when it strikes land. Tsunamis can have heights of up to 30 m and reach speeds of 950 km per hour. They are characterized by long wavelengths of up to 200 km and long periods, usually between 10 and 60 minutes.

Japan 2011:

Thanks to Sean H-C for the images. 
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Note:

  • How far back the water is pulled from the beach to form part of the huge Tsunami.
  • The speed of the wave. Look at the spray from the top of the wave.
  • The number of waves. There is more than one.

5. Strategies to reduce the impact of earthquakes.

6. Case examples of the effects of selected earthquakes.

Haiti Earthquake 2010 (External link)
Japan Earthquake 2011 (External link)

Current Earthquakes around the world.

[hungryfeed url=”http://earthquake.usgs.gov/earthquakes/catalogs/7day-M5.xml” link_target=”_blank”]

 

Geography teacher at heart and author of http://sageography.myschoolstuff.co.za. Account Manager for http://www.campuspress.com. Passionate about South Africa!