assignment 4

Question 1

Which plate boundary can have earthquakes with both shallow and deep foci?

a. Convergent
b. Divergent
c. Transform
d. All of the above

Answer 1

convergent

Question 2

What seismic wave travels in a rolling motion, both up and down and back and forth, similar to an ocean wave?

a. Primary (P) wave
b. Secondary (S) wave
c. Rayleigh wave
d. Love wave

Answer 2

Rayleigh wave

Question 3

5. What is the relationship between focus depth and how much destruction occurs as a result of an earthquake?

Answer 3

The relationship between the focus depth and the amount of destruction is that the deeper the focus point of the earthquake the less amount of destruction will occur.

Question 4

Intensity:

Answer 4

Intensity expresses the strength of an earthquake based on its destructive power and its affects on buildings and people, however it does not accurately measure the energy released by the earthquake.

Question 5

Magnitude:

Answer 5

Magnitude expresses the amount of energy released by the earthquake calculated by the largest body wave on a standardized seismograph, however this is not the most precise measure of earthquake energy released.

Question 6

True or False: The Richter Scale measures the intensity of an earthquake

Answer 6

false: The Richter scale measures the magnitude of an earthquake.

Question 7

True or False: Earthquakes occur only along plate boundaries.

Answer 7

false: Earthquakes occur along the plate boundaries and tectonic plates that are away from the boundaries.

Question 8

True or False: Primary (P) waves are the fastest moving seismic waves and will therefore be registered as the first waves to arrive at seismograph stations.

Answer 8

true

Question 9

True or False: The location of an earthquake epicenter can be determined as long as you have data from at least THREE seismograph stations.

Answer 9

true