A tsunami is a series of large water waves caused by the displacement of significant volumes of water, often due to earthquakes, volcanic eruptions, or landslides. They can travel at high speeds in deep water and significantly increase in height as they approach coastlines, with devastating effects including destruction, deaths, and environmental impacts. The document also outlines the types of tsunamis, their causes, historical occurrences, and signs for prevention.

2. Tsunami
Presented by: Shammas Bilal
Roll number: BSEE-30525
Course: Grooming & Sprucing

4. TSUNAMI
What is a Tsunami?
Tsunami Characteristics
Causes of Tsunami
Types of Tsunamis
Ring of fire
Historical Tsunamis
Tsunami Effects
Tsunami signs and Preventions

5. What is a Tsunami?
Tsunami is a series of
water waves caused by
the displacement of
large volume of a body
of water, usually an
ocean.

6. Tsunami Characteristics
 In deep water ,Tsunamis can travel at speeds
of even up to 600 mph (jet speed). In
shallow water, as they approach coastlines,
they slow down, bunch up, and can get
enormously tall.
 Out in the deep open ocean, the waves are
only one to two feet tall. But when they
approach the shore, waves encounter
shallow water. They slow down and the
waves height increases dramatically and may
reach even up to more than 100 ft.

7. Causes of Tsunami
Earthquakes
Volcanic Eruptions
Landslides
Meteorite Impacts
Other Causes

8. Types of Tsunamis
There are three types of Tsunamis:
Local Tsunami
• 100 km
• One hour
Regional Tsunami
• 100-1000 km
• 1-3 hours
Distant Tsunami
• More than 1000 km
• More than 3 hours

9. Ring of Fire
Tsunamis happen most
frequently in the Pacific Ocean
because of the many large
earthquakes associated with
subduction zones along the
margins of the Pacific Ocean
basin, which is called the "Ring
of Fire". Ninety percent of the
world's earthquakes occur
along the Ring of Fire.

10. Historical Tsunamis
 First tsunami was recorded in 1480 B.C. in Eastern Mediterranean, when Minoan
civilization was wiped out.
 North and South American records have dated such events back to 1788 for Alaska
and 1562 for Chile. Records of Hawaiian tsunami go back to 1821.Several tsunamis
have occurred throughout many years which include
1883,1929,1933,1946,1952,1958,1960,1979,1983,1992,1998,2004,2006, 2010,2011
and 2013.
 Amongst all these, the 2004 Indian Ocean tsunami is among the deadliest natural
disasters in human history with at least 230,000 people killed or missing in 14
countries bordering the Indian Ocean. It was spawned by an earthquake of
magnitude 9.0 off the coast of Sumatra.

12. Tsunami Effects
Destruction
Deaths
Diseases
Environmental Impacts
Psychological Effects

16. Tsunami Signs and Prevention
Following are few tsunami signs :
 Strong ground shaking from an earthquake
 Unusual sea-level fluctuations
 Abnormally huge wave
 Loud ocean roar
If you see any of these signs, run immediately to some higher ground or
inland, avoiding river valleys.

17. Never go down the shore to
watch tsunami.
CAUTION!

19. Thank You