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In an earthquake, huge masses of rock move beneath the Earth’s surface and cause the ground to shake. Earthquakes happen all the time around the world.

Most earthquakes are caused by changes in the Earth’s crust. The crust is made up rock masses called plates. These Plates are constantly moving. Over time this movement causes great pressure to build up. When the pressure becomes great, the rock masses suddenly shift along a crack in the crust, called a fault. The shifting rocks release energy in the form of shock waves, causing an earthquake.

Most earthquakes happen within the ‘Ring of Fire’ around the Pacific Ocean.

Alaska experiences a 7.0 earthquake at least once a year. California gets about 10,000 quakes a year, but most are unnoticed except by the seismograph machines.

 

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 MOVIES

Faults

 

 

 

Earthquake

 

 

 

Earthquakes and Mountains

 

 

 

TECTONIC PLATES

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  FLASH ANIMATIONS

Earthquakes Animation

How the Earth Plates Move

Earth Plate Animation 1

Earth Plate Animation 2

Earth Plate Animation 3

San Andreas Fault and Earthquake Animation

 

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Slide Show

  • San Francisco 1906
  • San Francisco 1989
  • Solomon Islands
  • Chile
  • Earthquake
  • Earthquake2
  • Fault Line San Andreas California
  • Haiti
  • Haiti2
  • Japan
  • Napa
  • Nepal

 

 

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LINKS

See World's Earthquake Activities for the Week

National Geographic

Nat Geo Video

Dynamic Earth: The Story of Plate Tectonics

Plate Tectonics

A Child's View of an Earthquake

GNS - Earthquakes

Latest Earthquake Information

Earthquake Data Center

Earthquakes

USGS

1906 Google Virtual Earthquake

 

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