NYS Earth Science Regents Review Practice - Tectonics

NYS Earth Science Regents Review Practice - Tectonics - Question 05

Written by The Earth Science Wizard

Thursday, 19 November 2009 15:05

5. Approximately how long does an earthquake P-wave take to travel the first 6500 kilometers after the earthquake occurs?

A) 6 mins

B) 10 mins

C) 8 mins

D) 18.5 mins

Correct Answer: Option B - 10 min

From page 10 of the Earth Science Reference Tables, we have the following data:

Locate the P-wave line. Then locate 6500 km on the x-axis of the P and S-wave chart. Follow the 6500 line up to the P line, when it intersects follow the line to the left and locate travel time. In the above case it is 10 mins.

Hence, options A, C and D are incorrect.

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