A seismograph station is located 2000 km from an earthquakes epicenter. Explain the order that the S and P waves will arrive at the station by using the characteristics of the waves.

Explanation:

The main characteristics that will determine the wave that will arrive at a seismic station first is the velocity of the wave.

Both S and P - waves are known as body waves as they travel through a body.

P-waves are primary longitudinal waves that uses a series of rarefactions and compressions to propagate parallel to the medium. They have the fastest velocity of all seismic waves. So they arrive at the station first.

S-waves are secondary or shear waves. They are transverses waves. They are the second waves to arrive a seismic station.

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