Tsunamis-5 Causes, 3 Hazards & 3 Prediction YouTube Lecture Handouts
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TSUNAMIS
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TSUNAMIS or tidal wave also known as a seismic sea wave is a series of waves in a water body.
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Caused by the displacement of a large volume of water.
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Generally occurs in an ocean or a large lake.
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Speed of tsunami waves depends on ocean depth rather than the distance from the source of the wave.
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It may travel as fast as jet planes over deep waters.
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Only slowing down when reaching shallow waters.
Image of Tsunamis
Image of Tsunamis
Image of Wave Movement
Image of Wave Movement
𝐾𝐸→𝑃𝐸
Image of Deep Water and Shallow Water
Image of Deep Water And Shallow Water
Measurement
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Intensity
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Sieberg-Ambraseys scale
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Imamura-Iida intensity scale
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Where is average wave height along closest coast?
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Magnitude
ℎ is maximum tsunami-wave amplitude (in m) calculated by tide gauge at distance 𝑅 from epicenter, 𝑎, 𝑏 & 𝐷 are constants
Causes
Image of Causes of Tsunamis
Image of Causes of Tsunamis
Hazards
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It is an agent which has the potential to cause harm to a vulnerable target.
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"Hazard" and "risk" used interchangeably.
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Hence, in terms of risk assessment, these are two very distinct terms.
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Classified as different types in several ways.
Prediction
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Prediction or forecast is a statement about an uncertain event.
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It is often, but not always.
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Based upon experience or knowledge.
-Manishika