EPS C20 FINAL ACTUAL QUESTIONS AND ANSWERS

EPS C20 FINAL (ACTUAL / ) QUESTIONS AND ANSWERS

Definition of an EQ: Common answer: ----Answers----when the ground under me is shaking,

Definition of an EQ: Scientific answer: ----Answers----when the ground breaks along the fault

What is the probability that there will be a 6 and above EQ in the 30 years in the Hayward Fault? ----Answers----27%

Subduction zone ----Answers----One plate gets pushed under the other and went it breaks due to a lot of pressure it may create a tsunami

Two tectonic plates separate (move away from each other) - Forms

volcanoes and new crust Ex: Iceland and mid-Atlantic ridge. As two

plates move apart the magma rises up, hits water (cools down), then makes new crust. ----Answers----Divergent fault

Two tectonic plate slide past each other horizontally, - Plates are not

smooth, they will jerk as they slide causing EQs. Example: San Andreas

Fault (Pacific Plate and the North American plate slide. ----Answers--- -Transform fault

When two plates collide (move towards each other ) ----Answers---- Convergent fault

When two tectonic plates with continental crust collide, they buckle and thicken - pushing the crust upward making mountain ranges and EQs. 1 / 2

For example: Himalayan Mountains ----Answers----

Continental/Continental collision

When a continental and oceanic plate collide, the oceanic plate slides under the continental plate ----Answers----Continental/Oceanic collision

When two oceanic plates collide, one of the plates is subjected, or sinks, under the other. - creates trenches - creates volcanoes ---- Answers----Oceanic/Oceanic Collision

Magma pushed through ocean floor, cooled, formed solid rock but over time grew big enough to make islands that popped above sea level,

Example: Hawaiian Islands ----Answers----Hot spot

Why doesn't Alaska have the highest risk? ----Answers----Although Alaska has a large amount of earthquakes occurring it is not very populated to the vulnerability is not so high.

Who has a higher risk than Alaska? ----Answers----Cascadia has more vulnerability than Alaska therefore, a higher risk. A large EQ will have a larger affect to the population and economy.

Has the risk changed in the Bay area since the 1868 EQ? ----Answers-- --Yes, there are now major bridges, Bart and higher population density increasing the vulnerability therefore increasing the risk!

What is Peak Ground Acceleration? ----Answers----1g = gravitational acceleration towards center of the earth. Everything > 1g = weightlessness

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