Formation, effects, causes, examples and mitigation of tsunami

1. BY
P.HARIKA

2. CONTENTS
•Introduction
•Formation
•Occurrence
•Causes
•Effects
•Mitigation

3. INTRODUCTION
•A long, high sea wave caused by an earthquake
or other disturbance.

4. FORMATION OF TSUNAMI

6. OCCURRENCE
• About 1000 tsunamis were documented and
verified
• Most of the tsunamis were small waves
• Only 10% of the verified tsunamis were of
catastrophic dimension due to their destructive
force.

7. How do tsunamis relate to Earthquakes

8. HISTORICAL
OCCURRENCES
DATE 17 July 2006
CAUSED BY evoked by a
quake(scale=7.7)
HEIGHT OF THE
WAVE
5 meters
LOSS OF LIFE 700
COUNTRY Indonesia

9. DATE 26 December
2004
CAUSED BY earthquake(scal
e=9.3) worst
tsunami ever
HEIGHT OF THE
WAVE
30 metres
(100 ft).
Similar to 10
floors of a
building
LOSS OF LIFE 3,00,000
COUNTRY Indonesia/Sumat
ra, Sri Lanka,
India, Thailand,
Myanmar,
Maldives,
Malaysia and
Bangladesh
HISTORICAL OCCURRENCES

10. HISTORICAL
OCCURRENCES
DATE 17 August 1999
CAUSED BY earthquake
HEIGHT OF THE
WAVE
2.52 meters
LOSS OF LIFE 17,000
COUNTRY northwest
Turkey

11. HISTORICAL
OCCURRENCES
DATE 17 July 1998
CAUSED BY seaquake(scale=
7.1)
HEIGHT OF THE
WAVE
15 meters
LOSS OF LIFE 2,000
COUNTRY New Guinea

12. HISTORICAL OCCURRENCES
DATE 18 November 1601
CAUSED BY • triggered by
landslides caused by
an earthquake.
• First tsunami
documented
HEIGHT OF THE WAVE 4 meters
LOSS OF LIFE 8
COUNTRY Switzerland

14. CAUSES
• Tsunamis are caused by sudden movements of the
earth that happens under the sea.
• Often the most destructive Tsunamis are caused by
earthquakes.

15. • Landslides cause tsunamis when the debris falls into
the water.

16. • Volcanoes cause tsunamis when there is an
eruption.

18. EFFECTS
• Tsunami - Damage and Destruction
• Loss of life
• Disease
• Cost
• Psychological Effects

19. MITIGATION
• First, protect yourself from an Earthquake. Drop, Cover, then
Hold On.
• Get to high ground as far inland as possible.
• Be alert to signs of a tsunami, such as a sudden rise or draining
of ocean waters.
• Listen to emergency information and alerts.
• Evacuate: DO NOT wait! Leave as soon as you see any natural
signs of a tsunami or receive an official tsunami warning.
• If you are in a boat, go out to sea.