6th Grade Ch. 2 Sec. 3 Monitoring Earthquakes

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6th Grade Ch. 2 Sec. 3 Monitoring Earthquakes

  1. 1. Ch. 2 Sec. 3 Monitoring Earthquakes <ul><li>Earthquakes quiz http://www.greenville.k12.sc.us/greerms/science/quakes.htm </li></ul>
  2. 2. seismogram <ul><li>record of ground movement of seismic waves </li></ul><ul><li>produced by seismograph </li></ul>
  3. 3. instruments that monitor faults movement measured how it works tiltmeters vertical Like carpenter’s level creep meters horizontal Wire stretched across fault laser ranging devices horizontal Laser beam  reflector GPS satellites along faults Measures tiny movement of markers
  4. 4. tiltmeter Like carpenter’s level
  5. 5. creep meter
  6. 6. laser-ranging device
  7. 7. GPS satellites
  8. 8. ways geologists use seismographic data map faults monitor changes along faults try to predict earthquakes
  9. 9. Using Seismographic Data <ul><li>The map shows the probability of a strong earthquake along the San Andreas fault. A high percent probability means that a quake is more likely to occur. </li></ul>

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