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How Tsunamis Work Video Lecture | General Knowledge Encyclopedia - Class 8

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FAQs on How Tsunamis Work Video Lecture - General Knowledge Encyclopedia - Class 8

1. How do tsunamis form?
Ans. Tsunamis are usually caused by undersea earthquakes, where the movement of tectonic plates generates powerful seismic waves that propagate through the ocean, leading to the formation of tsunamis.
2. What are the main factors that contribute to the strength of a tsunami?
Ans. The strength of a tsunami is determined by various factors, including the magnitude of the earthquake that triggers it, the depth of the earthquake's focus, the distance from the epicenter to the coast, and the shape and characteristics of the coastline that the tsunami encounters.
3. Can tsunamis be predicted?
Ans. While it is not possible to predict the exact timing and size of a tsunami, warning systems have been developed to provide timely alerts to coastal communities. These systems use seismic monitors and buoys to detect and measure earthquakes, helping to estimate the potential for a tsunami. However, it is important to note that these warnings may only provide a limited amount of time for evacuation.
4. How fast can a tsunami travel?
Ans. Tsunamis can travel at extremely high speeds, reaching velocities of up to 500 miles per hour (800 kilometers per hour) in the open ocean. However, as they approach shallow water near the coast, their speed decreases, and the height of the waves increases, causing the tsunami to become more destructive.
5. Are all coastal areas equally at risk from tsunamis?
Ans. No, not all coastal areas are equally at risk from tsunamis. Areas located near tectonic plate boundaries, known as subduction zones, are generally at a higher risk as they are prone to powerful earthquakes that can trigger tsunamis. However, it is important to note that even regions further away from these zones can still experience tsunamis due to the long-distance propagation of seismic waves in the ocean.
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