TSUNAMI

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VAISHNAVI
IX ‘A’

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2004 Indian Ocean Earthquake2004 Indian Ocean Earthquake
•Undersea
earthquake
•Magnitude 9.0
(Moment
magni t ude
s cal e)

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Epicenter 150 KM west ofEpicenter 150 KM west of
SumatraSumatra

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FactsFacts
• The earthquake came just three
days after a magnitude 8.1
earthquake in an uninhabited region
west of New Zealand
• Possible connection between these
two earthquakes
• Possibility of a seismic chain
reaction across neighboring plates
has also been considered

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Occurred along theOccurred along the
subduction zone where thesubduction zone where the
Indian dives under theIndian dives under the
Eurasian PlateEurasian Plate

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FactsFacts
• Total energy released by a
magnitude 9.0 earthquake exceeds
the total amount of energy
consumed in the U.S. in one month
• Massive release of energy and
shift in mass insignificantlyinsignificantly altered
the Earth' s rotation

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A tsunami (pronounced soo-
NAA-mee) is a series of waves
(called a "wave train")
generated in a body of water by
a pulsating or abrupt
disturbance that vertically
displaces the water column.

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Anthony Liekens 15:30, 28 Dec 2004 (UTC)
Tsunamis are
created when:
•Seafloor quickly
changes shape
•Water is
displaced
•Waves are
formed as the
displaced water
mass, which is
affected

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Tsunami's are also mistakenly
referred to as tidal waves as they
often resemble a tide that keeps
rising, rather than cresting waves
when they reach shore. However,
as they are not actually related to
tides the term may be misleading,
and its use is discouraged by
scientists.

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CharacteristicsCharacteristics
• Move at high speeds
• Can travel enormous distances
with little energy loss
• Can cause damage thousands of
miles from its origin
• May be several hoursseveral hours between
its creation and its impact on
the coast

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http://msnbc.msn.com/id/6770108/

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Warning SystemsWarning Systems
Many countries
around the
Pacific, including
Hawaii, have
warning systems
and evacuation
procedures in
the event of a
serious tsunami.

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Effects of TsunamisEffects of Tsunamis
• Destruction of human life
(100,000+)
• Destruction of property
• Spread of disease
• Destruction of ecosystems

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