Tsunamis
By Sienna Sayle
How are they caused?
A tsunami is often caused by an extremely
powerful earthquake under the ocean floor. This
earthquake pushes a large volume of water to
the surface creating waves.
In the deep ocean the waves are small. As they
approach the coast they get bigger and more
dangerous. Tsunamis often cause lots of damage
and many people die in tsunamis.
Tsunamis can be caused by volcanic eruption or
landslides.
Staying Safe
You must always go to high
ground if you see an Tsunami
You must warn others who do
not know, you could save
many lives. Tilly Smith once
saw a tsunami and with her
knowledge of tsunamis she
saved over one hundred lives
Where are you?
Are you safe and is your family safe?
Lithosphere
Ocean crust
asthenosphere
Continental crust
Volcanic arc
Funky Facts
The definition of tsunami is a Japanese
word that means harbour wave.
A tsunami can be so small that they
almost are not noticed however, some
waves can be recorded at measuring
extreme heights of up to 38 meters high.
Types of Tsunamis
There are three different types of tsunamis known s the Immediate Waves,
Seismic Seiches, Classical Waves.
Immediate Waves
This type of tsunami is created by sudden lateral moves. The water is pushed
and moves upwards. This wave then collapses outwards in both directions,
forming an almost instant response the ground movement. These wave are very
high although the in the ocean they are tiny waves you do not notice.
Seismic Seiches
The Seismic Seiches is caused by variations in the local tilting effects. These
waves are
called seismic seiches because the response of the water is dependent on its
properties and will take the form of waves growing big to them become a
tsunami.
Classical Waves
These waves are caused from the deep open ocean and these are normally able
to be recognized by special computers. Scientists often go to the laptops to
Interesting Information
Tsunami are known as killer waves. They
often are noticed when the tide goes out a
couple of meters and then minutes later
shooting forward, then massive waves occur
and smash down onto the ground drowning
many young and old.
The pacific is known as the most active
tsunami area on this planet. The worst
tsunami ever recorded was in Indian ocean
2004.
QUIZ
What is the highest height recorded of a
tsunami wave?
What does the word tsunami mean in
Japanese?
38 meters
Harbour wave
Pacific ocean
What is the most active tsunami area?
The Indian ocean 2004
Where was the worst tsunami ever?
No
Are waves huge in the deep ocean?
Thanks For Watching !!!!