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20 Matching questions

  1. The epicenter of an earthquake is the ________.
  2. The ________ is the point of origination for an earthquake.
  3. Why was the Marina District, San Francisco, heavily damaged in the 1906 and 1989 quakes?
  4. Approximately how often do locked segments of the San Andreas Fault (California) break, resulting in major earthquakes?
  5. The ________ is used to record ground shaking and the earthquake-magnitude scale was invented by ________.
  6. The largest lateral, ground displacement is produced by ________.
  7. The Mercalli Scale is a scale from ________.
  8. Approximately how much more energy is released in a 6.5 Richter magnitude earthquake than in one with magnitude 5.5?
  9. Energy is stored in rocks adjacent to the site of a future earthquake as ________.
  10. ________ is a widely accepted explanation for the mechanism that generates earthquakes.
  11. What are the smaller magnitude quakes that follow a major earthquake?
  12. P waves ________.
  13. Which one of the following statements concerning foci and epicenters is correct?
  14. The ________ is directly related to the Richter earthquake-magnitude rating.
  15. Which of the following foundation materials is most stable during earthquake shaking?
  16. ________ refers to the tendency for a foundation material to lose its internal cohesion and fail mechanically during earthquake shaking.
  17. The ________ magnitude scale is a measure of the energy released. It does not directly measure the extent of building damage.
  18. ________ was struck by three major earthquakes during the winter and spring months of the years 1811-1812.
  19. The elastic rebound theory for the origin of earthquakes was first proposed by ________ following the ________ earthquake.
  20. Which one of the following is true regarding tsunamis?
  1. a aftershocks
  2. b 30 times
  3. c Richter
  4. d New Madrid, Missouri
  5. e surface location directly above the point where the fault slip initiates
  6. f Reid; 1906, San Francisco
  7. g seismograph; Richter
  8. h They occur in the open ocean, wavelengths are many miles or kilometers and wave heights are only a few feet.
  9. i I to XII that rates the structural damage due to an earthquake
  10. j The epicenter is at the surface directly above the focus where the earthquake initiates.
  11. k Reid's elastic rebound theory
  12. l once every hundred and fifty years
  13. m focus
  14. n Liquefaction and foundation failures were common.
  15. o are faster than S waves and surface waves
  16. p horizontally vibrating surface waves
  17. q amplitude of the seismic waves
  18. r elastic strain
  19. s Liquefaction
  20. t bedrock