Tsunami/Phase 1/Lesson1 1

Tsunami -- Phase 1: Defining tsunami Contents Introduction  |  Teaching Guide  |  Phase 1: Defining tsunami  | Phase 2: The waves have gone... What now?  |  Phase 3: Tsunami survivor Phase 1 Lesson 1 Defining tsunami  | What is a tsunami?  |  Waves  |  Wave energy  |  Tsunami height  |  Height & run-up  |  Simulation Lesson 2 Warning sign  |  Natural signs  |  Official warnings  |  Unofficial warnings Lesson 3 Tsunami Signs  |  Signs quiz  |  Phase 1 summary
Objective You will be learning to define tsunami, describe how they occur and identify warning signs, man-made and natural.
Survival Agent iDevice:Activity -- title:Compact Activity It is important for anyone to understand what a tsunami is, but as the SA for your region you also need to know what causes them: how and why they occur. This information will not only help you to identify a tsunami, but will also help you guard against them in the most effective ways.
What is a tsunami? Tsunami are fast-moving, dangerous waves or series of waves. They are caused by large volumes of ocean water being moved by a major disturbance (such as a landslide, volcanic eruption, earthquake or meteorite.) When the wave or waves hit a shoreline, massive destruction to people and property can occur. The word tsunami is Japanese, meaning 'harbour wave'. What causes a tsunami? Tsunami occur due to: large underwater or coastal earthquakes, in which there is significant movement of the seafloor or coast underwater landslides (which may be triggered by an earthquake or volcanic activity) large coastal cliff or lakeside landslides underwater volcanic eruptions.
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