MEGA DISASTER: TSUNAMI

he principal generation cause of a tsunami is the displacement of a substantial volume of water or perturbation of the sea. This displacement of water is usually attributed to either earthquakes, landslides, volcanic eruptions, or more rarely by meteorites and nuclear tests.

Tsunamis can be generated when the sea floor abruptly deforms and vertically displaces the overlying water. Tectonic earthquakes are a particular kind of earthquake that are associated with the earth's crustal deformation; when these earthquakes occur beneath the sea, the water above the deformed area is displaced from its equilibrium position.

About 80% of tsunamis occur in the Pacific Ocean, but are possible wherever there are large bodies of water, including lakes. Natural factors such as shoreline tree cover can mitigate tsunami effects. Some locations in the path of the 2004 Indian Ocean tsunami escaped almost unscathed because trees such as coconut palms and mangroves absorbed the tsunami's energy.

Using archive footage, computer animation, and expert interviews, we expose the killer characteristics of natural disasters, leading to an ultimate disaster - a hypothetical event of unparalleled force and impact. Here we investigate the anatomy of a tsunami: from the science behind recent events, ramping to a mega tsunami that is yet to happen.

Producer: Michael Stedman
Language: English
Running Time: 52 minutes
Year: 2006
Video: 4:3 HD 1080P
Audio: Dolby 5.1
Format: Blu-ray and SD




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