Multiple Choice
Why are the travel- time curves for the P- wave and S- wave arrivals curved and not straight lines?
A) The greater the distance, the deeper the P and S waves travel, refracting through progressively denser layers.
B) They should be straight lines. Earth is flat and the time- travel graph proves it!
C) During an earthquake, Earth shakes so much that it is like a quivering rubber ball and all of the distances are wrong.
D) They have to bend with the curvature of the Earth.
Correct Answer:
Verified
Correct Answer:
Verified
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