Question

On a seismogram, the first S wave from a distant earthquake arrives 65 seconds after the arrival of the first P wave. Approximately how far is the earthquake epicenter from the seismograph station?

Answer 1

The computation shows that the distance of the earthquake epicenter from the seismograph station is 546km.

How to calculate the distance?

From the information given, the first S wave from a distant earthquake arrives 65 seconds after the arrival of the first P wave.

Therefore, the distance will be:

= 65 × 8.4

= 546km

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