Earthquake Vocabulary
Fault <ul><li>surface along which rocks move when they pass their elastic limit  </li></ul>
Earthquake <ul><li>vibrations produced when rocks break along a fault   </li></ul>
Normal Fault <ul><li>break in rock caused by tension forces, where rock above the fault surface moves down relative to the...
 
Reverse Fault <ul><li>break in rock caused by compressive forces, where rock above the fault surface moves upward relative...
 
Strike-Slip Fault <ul><li>break in rock caused by shear forces, where rocks moves past each other without much vertical mo...
 
Focus <ul><li>The point below the Earth’s surface where energy is released in the form of seismic waves </li></ul>
Seismic Wave <ul><li>wave generated by an earthquake   </li></ul>
Primary Wave (P-Wave) <ul><li>seismic wave that moves rock particles back and forth in the same direction that the wave tr...
P- Wave
Secondary Wave (S-Wave) <ul><li>seismic wave that moves rock particles at right angles to the direction of the wave.  Thes...
S- Wave
Comparison P-Wave S-Wave
Surface Wave <ul><li>Seismic wave that moves rock particles up and down in a backward rolling motion and side to side in a...
Damage Video
Epicenter <ul><li>point on Earth’s surface directly above an earthquake’s focus  </li></ul>
Seismograph <ul><li>Instrument used to register earthquake waves and record the time that each arrived </li></ul>
Magnitude <ul><li>The power of an earthquake.  Measured by the Richter Scale (1-10) </li></ul>
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Earthquake Vocabulary

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Transcript of "Earthquake Vocabulary"

  1. 1. Earthquake Vocabulary
  2. 2. Fault <ul><li>surface along which rocks move when they pass their elastic limit </li></ul>
  3. 3. Earthquake <ul><li>vibrations produced when rocks break along a fault </li></ul>
  4. 4. Normal Fault <ul><li>break in rock caused by tension forces, where rock above the fault surface moves down relative to the rock below the fault surface </li></ul>
  5. 6. Reverse Fault <ul><li>break in rock caused by compressive forces, where rock above the fault surface moves upward relative to the rock below the fault surface </li></ul>
  6. 8. Strike-Slip Fault <ul><li>break in rock caused by shear forces, where rocks moves past each other without much vertical movement </li></ul>
  7. 10. Focus <ul><li>The point below the Earth’s surface where energy is released in the form of seismic waves </li></ul>
  8. 11. Seismic Wave <ul><li>wave generated by an earthquake </li></ul>
  9. 12. Primary Wave (P-Wave) <ul><li>seismic wave that moves rock particles back and forth in the same direction that the wave travels. These waves travel fastest and arrive first. </li></ul>
  10. 13. P- Wave
  11. 14. Secondary Wave (S-Wave) <ul><li>seismic wave that moves rock particles at right angles to the direction of the wave. These waves arrive second. </li></ul>
  12. 15. S- Wave
  13. 16. Comparison P-Wave S-Wave
  14. 17. Surface Wave <ul><li>Seismic wave that moves rock particles up and down in a backward rolling motion and side to side in a swaying motion. These waves arrive last and are the most destructive. </li></ul>
  15. 18. Damage Video
  16. 19. Epicenter <ul><li>point on Earth’s surface directly above an earthquake’s focus </li></ul>
  17. 20. Seismograph <ul><li>Instrument used to register earthquake waves and record the time that each arrived </li></ul>
  18. 21. Magnitude <ul><li>The power of an earthquake. Measured by the Richter Scale (1-10) </li></ul>
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