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A seismograph station recorded the arrival of the first
P-wave at 7:32 p.m. from an earthquake that occurred
4000 kilometers away. What time was it at the station
when the earthquake occurred?


Sagot :

Answer:

7:25 pm

Explanation:

The time for P-waves to travel 4000 kilometers is 7 minutes.At 7:32 P.M the P-waves from an earthquake,which is 4000 kilometers away,we're recorded at a seismograph station.This indicates that the time when the earthquake occurred at the epicenter is at 7:25 P.M,which is 7 minutes before the first P-waves were recorded.