What Is a Tsunami?
A tsunami is a series of very large ocean waves caused by sudden movement under the sea. The word “tsunami” comes from Japan and means “harbor wave.” Tsunamis can travel very fast across the ocean and become dangerous when they reach land.
What Causes a Tsunami?
Most tsunamis are caused by:
Earthquakes under the ocean
Volcanic eruptions
Landslides into the sea
Sometimes even meteor impacts
When the ocean floor suddenly moves, it pushes a huge amount of water. This creates powerful waves that travel across the sea.
How Fast Can a Tsunami Travel?
A tsunami can travel as fast as an airplane! In deep water, some tsunami waves can move at speeds of over 800 kilometers per hour.
In the open ocean, the waves may look small. But when they reach shallow water near land, they grow much taller and stronger.
Famous Tsunamis in History
One of the most famous tsunamis happened in 2004 in the Indian Ocean. A strong earthquake caused huge waves that affected many countries, including Indonesia, Thailand, India, and Sri Lanka. Thousands of people lost their lives.
Another major tsunami happened in 2011 in Japan after a powerful earthquake. The disaster damaged homes, roads, and even nuclear power plants.
Tsunami Safety Tips
If you are near the sea, remember these important safety tips:
Move to higher ground after a strong earthquake.
Stay away from beaches during tsunami warnings.
Listen to local authorities and emergency announcements.
Prepare an emergency bag with food, water, and medicine.
Do not return to the coast until officials say it is safe.
Vocabulary Words
| Word | Meaning |
|---|---|
| Tsunami | A series of large sea waves |
| Earthquake | Sudden shaking of the ground |
| Evacuate | To leave a dangerous place |
| Coast | Land beside the sea |
| Warning | A sign of danger |
Reading Comprehension Questions
What is a tsunami?
What usually causes a tsunami?
Why do tsunami waves become bigger near land?
What should people do after a strong earthquake near the sea?
Which countries were affected by the 2004 tsunami?
Discussion Questions
Have you ever experienced an earthquake or typhoon?
What natural disasters happen in your country?
Why is it important to prepare for emergencies?
How can communities help each other during disasters?
Writing Activity
Imagine you are visiting a beach when a tsunami warning suddenly happens. Write 5–8 sentences about what you would do to stay safe.
Conclusion
Tsunamis are powerful natural disasters, but learning about them can help people stay safe. By understanding warning signs and following safety rules, communities can better protect themselves and others. Knowledge and preparation are very important during emergencies.
0 Comments