What’s an Earthquake ?

Lisa NyilosAmanda NasserMrs. SmithHour 4

April 8, 2011

Basic Background Information

What is an earthquake?a series of vibrations induced in the earth's

crust by the abrupt rupture and rebound of rocks in which elastic strain has been slowly accumulating.

How are earthquakes measured?Earthquakes are measured by a seismograph.

What does magnitude mean?Magnitude is the property of relative size or extent.

How is magnitude measured?Magnitude of an earthquake is measured by the Richter scale.

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Damage Caused by Earthquakes

• Collapsed buildings .

• Put cracks in the cement and ruin main roads and highways.

• Destroy homes and cities.

• Hurt and effect the earth .QuickTime™ and a

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Waves

What are earthquake waves called?Type your answer here.

What two types of seismic waves are there?Type your answer here.

What two types of body waves are there?Type your answer here.

Body Waves

How do P waves travel?Type your answer here.

How do S waves travel?Type your answer here.

Which move faster?Type your answer here.

Elastic Rebound

Replace these directions with your description of elastic rebound.

You may also insert images or an animation to help explain.

In what type of plate boundary does elastic rebound occur?

The Tohoku Earthquake

This quake occurred at :Type in time

This quake occurred Type in the location

The magnitude of this quake wasType in the magnitude

Effects on the environment/earth

• Japans coastline may have shifted by as much as 4 m. (13ft.) to the east.

• It probably shifted earth on its axis by about(6.5in.).

• And probably caused the planet to rotate some what faster, shortening the length of the day by about 1.8 millionths of a second.

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Effects on the People of Japan

• They have little to no food

• Homes and cars were being washed away.

• Homes and buildings were collapsed .

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Effects on the Economy of Japan

• The stock market plunged to the ground all over the world.

• The tsunami and nuclear crisis could hurt japans economy

• Type one effect here

Replace these words with an appropriate image.

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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?Type your answer here.

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

earthquake.usgs.gov/earthquakes/recenteqsww/Quakes/usc0001xgp.php

http://www.diigo.com/bookmark/http%3A%2F%2Fwww.bbc.co.uk%2Fnews%2Fmobile%2Fscience-environment-12732335?tab=people&uname=richardsjhttp://www.factmonster.com/ce6/sci/A0857866.htmlwww.geo.mtu.edu/UPSeis/intensity.html

http://dictionary.reference.com/browse/earthquake

http://www.nytimes.com/2011/03/14/business/global/14yen.htm

http://ptwc.weather.gov/faq.php#6

http://wcatwc.arh.noaa.gov/characteristics.htm

http://www.npr.org/2011/03/14/134542510/tsunamis-effect-on-japans-economy-hard-to-judge

http://library.thinkquest.org/C004218/Damage%20caused%20by%20earthquakes.htm