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Earthquakes and Seismic Waves. Dan Tingley, Angel Achar, and Nick Franco . Fault. Fault - break in the rocks that make up the Earth’s crust To be a fault, the rocks on either side must be moving Sometimes the movement is sudden, and it causes an earthquake. Focus and Epicenter.

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Earthquakes and seismic waves

Earthquakes and Seismic Waves

Dan Tingley, Angel Achar, and Nick Franco


Fault
Fault

  • Fault - break in the rocks that make up the Earth’s crust

  • To be a fault, the rocks on either side must be moving

  • Sometimes the movement is sudden, and it causes an earthquake


Focus and epicenter
Focus and Epicenter

  • Focus - the place in the Earth where the movement happens in an earthquake

  • Epicenter - the point on the Earth’s surface directly above the focus


Seismic waves
Seismic Waves

  • Seismic waves are waves that travel through the Earth because of an earthquake

  • Two Kinds: Body and Surface waves

    -Body travel inside the Earth


P waves
P-Waves

  • Primary Waves

  • P-waves travel through all the layers of the Earth

  • The fastest of all seismic waves

  • Squeeze and pull rocks in same direction as the movement of the wave


S waves
S-Waves

  • Secondary Waves

  • Cause the rocks to move at a right angle to the movement of the wave

  • Slower than P-Waves


Surface waves
Surface Waves

  • Up and down, side to side movement

  • Travel along Earth’s surface

  • Cause the most damage in an Earthquake


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