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Earth science 8.2
Earth science 8.2
Earth science 8.2
Earth science 8.2
Earth science 8.2
Earth science 8.2
Earth science 8.2
Earth science 8.2
Earth science 8.2
Earth science 8.2
Earth science 8.2
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Earth science 8.2

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  • 1.  Instrument that records earthquake waves.
  • 2.  Modern seismograms amplify and electronically record ground motion, producing a trace.
  • 3.  Also called L waves, are seismic waves that travel along Earth’s outer layer.
  • 4.  Push pull waves. Compress and expand rocks in the direction the wave travels.
  • 5.  Shake particles at right angles to their direction of travel.
  • 6.  Derived from the amount of displacement that occurs along the fault.
  • 7.  A seismogram shows all three types of seismic waves- surface waves, P waves, and S waves
  • 8. Travel- time graphs from three or more seismographs can be used to find exact location of an earthquake epicenter.
  • 9.  Historically, scientists have used two different types of measurements to describe the size of an earthquake- intensity and magnitude
  • 10.  Moment magnitude is the most widely used measurement for earthquakes because it is the only magnitude scale that estimates the energy released by earthquakes.

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