An earthquake at the edge of a tectonic plate can displace large amounts of water and generate a tsunami. When the ocean floor suddenly rises or drops, it throws the water above it into large waves that travel towards the shore. Most tsunamis occur in the Pacific Ocean, called the "Ring of Fire", where there is frequent seismic and volcanic activity. The Japanese word "tsunami" means "harbor wave" and describes the huge waves that can overwhelm coastal areas, as seen in the devastating 2004 Indian Ocean tsunami that killed over 280,000 people.

1. NATURAL DISASTER
TSUNAMI
Presented by:
Sofia Torres
Yennifer Pereira

2. That is a tsunami
A tsunami is a series of waves from the ocean that
sends large waves of water that sometimes reach
heights of 30.5 metres, towards the interior. These
walls of water can cause widespread destruction
when they hit the coast.
These breathtaking waves are usually caused by
great submarine earthquakes at edges of tectonic
plate. When the floor of the ocean at a plate edge
rises or drops suddenly, displaces water that are on
it and throws in the form of undulating waves that
will become a tsunami.

3. Slide Title

4. How a tsunami is generate by an
earthquake

5. How a tsunami is generate by an
earthquake
• On the Earth, these tecthonic plates are
constantly in motion, moving along each other
at a speed of 1 to 2 inches (2.5 to 5 centimeters)
per year. The movement occurs most
dramatically along fault lines (where the pie
is cut). These motions can produce earthquakes
and volcanism, which, when they occur at the
bottom of the ocean, are two possible sources of
tsunamis.

6. How Tsunamis Work
• Think of a pie cut into eight slices. The piecrust
would be the lithosphere and the hot, sticky pie
filling underneath would be the asthenosphere. On
the Earth, these plates are constantly in motion,
moving along each other at a speed of 1 to 2 inches
(2.5 to 5 centimeters) per year. The movement occurs
most dramatically along fault lines (where the
pie is cut). These motions can produce earthquakes
and volcanism which, when they occur at the
bottom of the ocean, are two possible sources of
tsunamis

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8. Where the disaster is
most common

9. Where the disaster is most
common
• Most of the tsunami, about 80%, occur in the
Pacific Ocean, in the belt of fire, a geologically
active area where tectonic movements make
volcanoes and earthquakes are common. In
addition the type of failure that occurs between
the Nazca and South American, called
subduction, namely that a plate is sliding under
the other, make more conducive deformity of the
seabed and therefore to tsunamis.

10. Origin of the word
tsunami

11. Origin of the word tsunami
• Tsunami is a Japanese word which means "big
wave in the port". Unlike common waves, the
tsunami may have a wavelength exceeding 100
km and a period of one hour between a wave and
another.

12. FACTS
BIGGER RECENT
TSUNAMIS• - 1929 Grand Banks, Canada
- 1946 Aleutian Islands, Alaska
- 1952 Kamchatka Peninsula, Russia
- 1957 Aleutian Islands, Alaska
- 1960 Chile
- 1964 Prince Williams Sound, Alaska
- 1975 Hawaii
- 26 de Diciembre de 2004 Sudeste Asiático

13. FACTS
BIGGER RECENT
TSUNAMIS

14. Victims of the tsunami
• During the last 2000 years in the
Pacific tsunami killed some 500,000
people. Only one of the 2004 tsunami in
the Indian Ocean in the current
estimates killed more than 280,000
people.

15. Victims of the tsunami

17. BEFORE THEBEFORE THE
DISASTERDISASTER
• 1.Find out if you live in high-risk areas
and locate possible evacuation routes
and safe sites.
2. Know the warning signs.
3. Gather your family to define in a
participatory manner in the event of a
tsunami emergency plan.
4. Train your family and coworkers, in
how to act in case of emergency

18. BEFORE THEBEFORE THE
DISASTERDISASTER

19. You should buy :
• *First aid kit.
* Radio and extra batteries.
* Flashlight with spare bulb and
batteries.
* Pito.
* Reserve of food and water, frequently
checking the expiration date and your
state.
* Plastic for the weather.

20. You should do during the disaster
• 1.Keep calm. Do not quit running, avoid the
panic.
2. Activate your emergency plan, follow the
evacuation routes previously established.
3. Use the battery-operated radio to learn more
about the situation and follow the
recommendations of the relief agencies. This
attentive to warning system previously
established. But don't depend on this to evacuate,
you can fail by an earthquake before, remember
the warning signs and evacuate.

21. You should n’t do during the disaster
• You shouldn’t wait for the alert, go
immediately to a site high, it may be
that after the earthquake sells the
tsunami.
• Don't walk away from his family and
stay in a safe place
• Do not stand close to the beach and try
not to miss the calm

22. You Should do after the tsunami
• 1.If you are trapped, warn by shouts, noise,
whistles or if possible by cell phone.
2. Check if you are working the phones and
cell phones and only use it for short periods.
3.Check the recommendations given by the
local committees for the prevention and
attention of disasters.
4.After the tsunami, the affected area is
flooded, so it should have the same care,
especially against wastes and dangerous
animals, those who seek refuge also in
Highlands.