An Earthquake Emits Both P Waves and S Waves That

question 16

Multiple Choice

An earthquake emits both P waves and S waves that travel at different speeds through the Earth. Suppose a P wave travels at 8000 m/s and an S wave at 4000 m/s. If P waves are received at a seismic station 20.0 s before an S wave arrives, how far is the station from the earthquake center?

• A) 80 km
• B) 160 km
• C) 240 km
• D) 320 km

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