Earthquakes
The Tohoku Earthquake
Chris Bowdler
Mrs. Smith
5th Hour
April 8, 2011
This quake occurred at :
14:46:23

This quake occurred
East of Tohoku

The magnitude of this quake was
9.0
Basic Background Information
Effects on the environment/earth
How are earthquakes measured?
Earthquakes are measured on a seismometer.

What does magnitude mean?
Magnitude is the brightness of stars.

How is magnitude measured?
Magnitude is measured on the Richter scale.
Nuclear Power Plants were shut down.


A tsunami was started.


There were 915-916 aftershocks.
Damage Caused by Earthquakes

Effects on the People of Japan
Cracks in the Ground

Building Collapses

Electricity Loss

Cars Damaged
12,787 people were killed.

4,661 people were injured.

14,991 people went missing.
Waves
Effects on the Economy of Japan
What are earthquake waves called?
Earthquake waves are called seismic waves.

What two types of seismic waves are there?
Two types of seismic waves are called body waves and surface waves.

What two types of body waves are there?
The two types of body waves are primary waves, or p waves, and secondary

waves, or s waves.




Early estimates placed insured losses of from the earth

Type one effect here Replace these words
with an appropriate image.

Type one effect here Replace these words
with an appropriate image
Body Waves

GPS Sensors
How do P waves travel?
P waves travel through rock material by causing particles in the rock to vibrate in the same direction as the waves are moving.

How do S waves travel?
S waves travel through rock material by causing particles in the rock to vibrate at right angles to the direction in which the waves are moving.

Which move faster?
P waves move faster than s waves.
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?
Type your answer here.
Elastic Rebound
Elastic rebound is an explanation for how energy is spread during earthquakes.


In what type of plate boundary does
elastic rebound occur?

Strike-Slip Fault
Tsunamis
What is a tsunami?
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How do tsunami waves appear at sea?
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How high can tsunami waves be?
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How fast can tsunami waves move?
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Sources Used http://www.howstuffworks.com/dictionary/astronomy-terms/magnitude-info.htm
http://answers.ask.com/Science/Nature/how_are_earthquakes_measured
http://www.geo.mtu.edu/UPSeis/intensity.html
http://www.geo.mtu.edu/UPSeis/waves.html
http://answers.yahoo.com/question/index?qid=20110313073046AAyxbjR
http://en.wikipedia.org/wiki/Elastic-rebound_theory
http://www.iris.edu/hq/programs/education_and_outreach/animations/11