Why does the difference in arrival times of P and S waves increase at seismograph recording stations that are farther away from the epicenter?

This difference increases because p-waves travel faster than s-waves. Therefore, if a seismograph is far from the epicenter, readings of the p-waves will arrive first, but since those waves travel faster than s-waves, it might be a bit longer before readings of the s-waves appear.

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mapooja789 mapooja789 · Answer 2 · 2022-05-31T06:27:24-04:00

The difference in arrival times of P and S waves increasese at seismograph recording stations because the farther a seismic recording station is from the earthquake epicenter.

Why does the difference in arrival times of P and S waves increase at seismograph recording stations?

As the P and S waves travel out from an earthquake the P waves get progressively farther ahead of the S waves. Therefore, the farther a seismic recording station is from the earthquake epicenter the greater will be the difference in time of arrival between the P and S waves.

What happened to the difference in the arrival time between the P wave and S wave as the distance from the earthquake increases?

S waves, which travel at about half the speed of P waves, arrive later. A seismic station close to the earthquake records P waves and S waves in quick succession. With increasing distance from the earthquake the time difference between the arrival of the P waves and the arrival of the S waves increases.

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