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