Earthquakes

Brittany Connelly

Aleksandra Kocz

Mrs. Smith

3rd Hour

April 8, 2011

Basic Background Information

-What is an earthquake?

The shaking that results from the movement of rock beneath Earth’s surface .

-How are earthquakes measured?

Seismic Waves .

-What does magnitude mean?

A measurement of earthquake strength based on seismic waves and movement along faults .

-How is magnitude measured?

Movement Magnitude Scale .

Damage Caused by Earthquakes

• Tsunami . • Death . • Damaged Nuclear Power Plants .• Buildings Fall Apart .

Waves

What are earthquake waves called?

Seismic Waves .

What two types of seismic waves are there?

Primary and Secondary .

What two types of body waves are there?

Primary and Secondary .

Body Waves

How do P waves travel?

Stretch and compress the rock in their path through Earth .

How do S waves travel?Move the rock in their path up and down and side to

side . Which move faster?Seismic Waves .

Elastic Rebound

Theory of earthquakes that envisades gradual deformination of the fault slippage until friction is overcome , when suddenly slips to produce the earthquake .

The elastic rebound theory of earthquakes sources allows rough prediction of the occurrence of large shallow earthquakes .

The uplift associated with earthquakes and mountain building. Uplift of the Earth’s surface also has occurred in response to the removal of Pleistocene ice sheets through melting and wastage .

Elastic rebounds occur in the

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The Tohoku Earthquake

This quake occurred at :

2:46 p.m.

This quake occurred East , West .

The magnitude of this quake was9.0

Effects on the environment/earth

Caused the planet to rotate faster , shortening the length of the day by about 1.0 millionths of a second .

Tsunami .

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Effects on the People of Japan

Famine .

Missing People .

Limited Resources .

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Effects on the Economy of Japan

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GPS Sensors

• One interesting fact about this earthquake is that it moved several GPS sensors. This will require …(Type answer here)

• How does elastic rebound explain this movement?

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Tsunamis• What is a tsunami?Type your answer here. You can erase the question.

• How do tsunami waves appear at sea?Type your answer here. You can erase the question.

• How high can tsunami waves be?Type your answer here. You can erase the question.

• How fast can tsunami waves move?Type your answer here. You can erase the question.

Websites Used

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