This is a PPT about Tsunami. It contains slides about its causes, its impact, its warning signals, its aftermath, its previous occurrences and prevention measures by various countries.

1. Tsunami

2. Index
• Introduction
• Causes
• Various Causes for Tsunami
• Historical Tsunamis
• Tsunami Warning Systems
• Tsunami Warning Symbols

3. Tsunami
A series of waves in a water body
caused by the displacement of a large volume
of water in a ocean or a lake

4. Tsunami
• Derived from Japanese word ‘Kanji’ and
‘Nami’
• Means: Harbor Wave
• Refers to Tidal waves or seismic sea waves
• First Tsunami : 7000–6000 BCE Lisbon,
Portugal
• Last Tsunami: 2017 Greenland Tsunami

5. Causes of Tsunami
• Displacement of Substantial volume of water
• Deviation of Sea

6. Cause:1 Due to Earthquakes
Tsunami at Mexico City, 2004 India Tsunami

7. Cause:2 Due to Landslides
Tsunami at Lituya Bay, Alaska.

8. Cause:3 Due to Glacier Calving
Tsunami at Greenland

9. Cause:4 Due to Meteorites
Tsunami at Hawaiian Islands

10. Cause:5 Due to Nuclear Tests
Halifax Explosion

11. Historical Tsunamis
• 1958 Lituya Bay megatsunami - a record
height of 524 m
• 1980 Spirit Lake megatsunami - measured
260 m
• Deadliest Tsunami:
2004 Indian Ocean tsunami, killed almost
230,000 people

12. Tsunami Warning Systems
• Bottom pressure sensors - monitor the
pressure of the overlying water column.
• Pacific Tsunami Warning System - monitors
Pacific Ocean seismic activity.
• Japan’s Tsunami Warning System – alerts
people within minutes of earthquakes

13. Tsunami Warning Symbols
Warning Messages

14. Traffic Warning Symbols
Tsunami Buoy

15. Traffic Warning Symbols
Warning Boards

16. Traffic Warning Symbols
Tsunami Siren

17. Traffic Warning Symbols
Dart Buoy

18. 2004 Indian Ocean Tsunami
• Affected 18 and more countries
• Some: India, Sri Lanka, Indonesia, Thailand,
Malaysia, Myanmar, Bangladesh and more
• Third largest tsunami
• 66% Industrial structure loss
• Affected employment of 250,000 people

19. 2004 Indian Ocean Tsunami
Impacts:
• Huge Damage to the ecosystems
• Destruction of sewage collectors
• Poisoning of fresh water supplies
• Rice plantations were destroyed

20. 2004 Indian Ocean Tsunami
Films on 2004 Tsunami
• Tsunami: Caught on Camera
• The Wave That Shook The World
• Kayal
• The Impossible
• Tsunami: The Aftermath
• Hafalan Shalat Delisa – Indonesian Movie

21. Aftermath of Tsunami

22. Aftermath of Tsunami (Contd.)

23. Aftermath of Tsunami (Contd.)

24. Aftermath of Tsunami (Contd.)

25. THE END