EAPS 106: EXAM 1- UNIT 2:
EARTHQUAKES QUESTIONS AND
ANSWERS
30. The number of earthquakes of any size that occur globally each year - Correct
Answers -1.3 million
31. The largest earthquake to occur on Earth over the past 100 years - Correct Answers
-Chile in 1960. 9.5 Richter Scale
32. How often large earthquakes occur on the San Andreas Fault - Correct Answers -
About every 150 years on average
33. Where do most earthquakes occur - Correct Answers -at or near plate boundaries
(fault lines), where the crust is being torn apart to accommodate plate motions
34. The concepts of elastic rebound and stick-slip behavior - Correct Answers -●
Earthquake- sudden break in the crust after a long period of stress buildup due to
motions of the tectonic plates
● Elastic rebound- the crust bends like rubber (storing energy), then unbends (releasing
energy), like a bouncy ball
● Stick-slip behavior- faults remain stuck while energy builds, then suddenly slip when
energy is released
35. The rough parts of a fault that prevent slippage - Correct Answers -Asperities- Parts
at which two faults can stick to each other until stress breaks them apart.
36. How wee infer the build up of stress on a fault - Correct Answers -GPS
measurements and the velocity at which plates are moving
37. The kinds of faults that occur in compressional, extensional, and lateral shear
settings. - Correct Answers -● compressional settings- thrust faulting
● extensional settings- normal faulting
● lateral shear settings- strike-slip faulting
42. What reflection and earthquake seismology allow us to visualize respectfully -
Correct Answers -Reflection seismology, using man-made explosions, allows
EARTHQUAKES QUESTIONS AND
ANSWERS
30. The number of earthquakes of any size that occur globally each year - Correct
Answers -1.3 million
31. The largest earthquake to occur on Earth over the past 100 years - Correct Answers
-Chile in 1960. 9.5 Richter Scale
32. How often large earthquakes occur on the San Andreas Fault - Correct Answers -
About every 150 years on average
33. Where do most earthquakes occur - Correct Answers -at or near plate boundaries
(fault lines), where the crust is being torn apart to accommodate plate motions
34. The concepts of elastic rebound and stick-slip behavior - Correct Answers -●
Earthquake- sudden break in the crust after a long period of stress buildup due to
motions of the tectonic plates
● Elastic rebound- the crust bends like rubber (storing energy), then unbends (releasing
energy), like a bouncy ball
● Stick-slip behavior- faults remain stuck while energy builds, then suddenly slip when
energy is released
35. The rough parts of a fault that prevent slippage - Correct Answers -Asperities- Parts
at which two faults can stick to each other until stress breaks them apart.
36. How wee infer the build up of stress on a fault - Correct Answers -GPS
measurements and the velocity at which plates are moving
37. The kinds of faults that occur in compressional, extensional, and lateral shear
settings. - Correct Answers -● compressional settings- thrust faulting
● extensional settings- normal faulting
● lateral shear settings- strike-slip faulting
42. What reflection and earthquake seismology allow us to visualize respectfully -
Correct Answers -Reflection seismology, using man-made explosions, allows
