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What is a Tsunami
°ü¸®ÀÚ 2025-09-04 ¿ÀÈÄ 4:40:00 519

 

What is a Tsunami? 

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Description: 


A tsunami is a series of large, powerful waves caused by underwater earthquakes or tectonic shifts. When the ocean floor moves suddenly, it releases energy that creates waves traveling at high speeds. As these waves reach shallow waters near the shore, they grow taller and can cause significant destruction. 

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Transcription:  


What is a tsunami? 


¡°I don¡¯t know.¡± 

Tsunami is a series of giant waves. 

In Japanese, tsunami means 'Harbor Wave'. 

¡°And in Chinese?¡± 

Oh, just listen. 

 

A wave is created when energy passes through water. 

Moving air or wind provides energy to water, forming regular waves. 

While on the ocean floor, when a tectonic plate suddenly slides beneath the other, the resulting earthquake releases a tremendous amount of energy. 

This energy spreads outward from the point of earthquake, triggering waves that can form tsunami. 

Initially, these waves are small in size but they travel at great speeds. 

However, when the waves approach the shore, the rising seabed obstructs the energy of waves. 

This slows down the speed of waves. 

But the energy flux must remain constant, leading to an increase in the height of waves, thus resulting in tsunami. 

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Questions: 


1. What is a tsunami?  

2. Where does the word "tsunami" come from?   

3. How does a tsunami form? 


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