A tsunami is a series of waves generated by an underwater displacement of water, usually caused by earthquakes. Tsunamis are not single waves but rather a "wave train" consisting of multiple waves. They can be very destructive when reaching land, causing flooding and crushing coastal structures with fast-moving water. Proper warning systems and evacuation of low-lying areas can help reduce loss of life from these devastating natural disasters.

2. What is a tsunami?
• A tsunami is a series of
waves created when water
is moved very quickly.
Underwater earthquakes
are the most common
causes of tsunamis, but
underwater volcanic activity
can also trigger a
displacement in the water,
and create a mega-wave.

3. Tsunami "Wave Train"
Many people have the mistaken belief that
tsunamis are single waves. They are not.
Instead tsunamis are "wave trains" consisting
of multiple waves. Time is plotted along the
horizontal axis and water level is plotted on the
vertical axis. Note the normal rise and fall of
the ocean surface, caused by tides, during the
early part of this record.

5.  Volcanic eruptions
 Icefalls
 Heavy rainfall
 Underwater earthquake

6. .Tsunami is one of the earth’s disaster. It was a Japanese
word
meaning “harbor wave,” used as the scientific term for a
class
of abnormal sea wave.
.Tsunamis can be generated by an undersea earthquake,
an undersea landslide, the eruption of an undersea volcano,
or by the force of an asteroid crashing into the ocean.

7. View of a Tsunami Taken By A Satellite

8. GENERATION OF TSUNAMIS
A Tsunami is generated when a large
amount of water is displaced which is
done-:
 Mainly By The Earthquakes.
 By The Landslides.
 By Volcanic Eruptions.
 By Impact Events like Meteorite impacts

9. Earthquakes – The Major Cause
 The Sea floor abruptly
deforms and displaces the
sea water lying above.
 Large vertical movements
of earth's crust can occur at
plate boundaries which are
called “faults”.

10.  Tsunamis may reach a maximum vertical
height onshore above sea level, often called
a run up height, of 10, 20, and even 30
meters.
 For a typical ocean Depth of 4000m, a
tsunami moves with a speed about
700km/hr.
 The fast-moving water associated with the
inundating tsunami can crush homes and
other coastal structures.

11.  Around 10,000 killed in
India.
 In Thailand, more than
4,000 are feared dead
and dozens of deaths
are reported in
Malaysia, Myanmar
and Maldives.
 WHO estimates five
million people are
without basic needs.

12. RELIEF WORKS IN INDIA
 Donations done under
the Prime Minister Relief
Fund.
 Rice, mats, medicines
were provided.
 ITC distributed over 1
lakh shirts to the victims.
 New houses were
provided.

13.  Loss of life and property can be reduced by
proper planning.
 Tsunami warnings can be made to aware
peoples.
 Stay away from all low lying coastal areas.
 Never go down to the shore to watch
tsunami.
 Stay out of low lying danger areas until an
“all-clear” is issued by competent authority.

14. THANK YOU