Nice

1. TSUNAMI
• Name: Gaurav
• Class: 9A
• Subject: Social Science

2. Introduction
• A tsunami is a series of large ocean waves.
• It is caused by sudden movement under the
sea.
• Tsunamis can cause massive destruction.

3. Meaning of Tsunami
• The word 'Tsunami' means 'harbour wave'.
• It is a Japanese word.
• Tsunamis are not normal sea waves.

4. Causes of Tsunami
• Undersea earthquakes
• Volcanic eruptions
• Landslides
• Meteor impacts

5. How Tsunami Forms
• Earthquake occurs under the ocean.
• Seabed moves suddenly.
• Large waves are generated.

6. Speed of Tsunami
• Can travel up to 800 km/h.
• Waves slow near the coast.
• Wave height increases near land.

7. Tsunami Waves
• Very long wavelength
• Low height in deep sea
• Very high near the coast

8. Warning Signs
• Sudden withdrawal of sea water
• Strong ground shaking
• Loud ocean roar

9. Effects of Tsunami
• Loss of human life
• Destruction of homes
• Damage to environment

10. 2004 Indian Ocean Tsunami
• Occurred on 26 December 2004
• Caused by undersea earthquake
• Affected India, Sri Lanka, Indonesia

11. Impact on India
• Severe damage in Tamil Nadu
• Thousands lost their lives
• Coastal villages destroyed

12. Tsunami Warning System
• Seismographs detect earthquakes
• Satellites monitor ocean
• Early warning saves lives

13. Safety Measures
• Move to higher ground
• Follow evacuation orders
• Stay away from coast

14. After a Tsunami
• Provide medical aid
• Rebuild homes
• Restore environment

15. Acknowledgement
• I thank my parents for their support.
• I thank Nagarathna Mam, our Social teacher,
for her guidance.

16. Bibliography
• NCERT Social Science Textbook
• www.nationalgeographic.com
• www.ndma.gov.in