How Far Away Did the Earthquake Occur Based on Wave Time Delay?

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SUMMARY

The discussion centers on calculating the distance of an earthquake from a seismic station using the time delay between P-waves and S-waves. P-waves travel at 6.9 km/s and S-waves at 4.8 km/s. A time delay of 15 seconds indicates that the earthquake occurred 236.6 kilometers away from the seismic station. The participants emphasize the importance of understanding the wave speeds and the relationship between time delay and distance.

PREREQUISITES
  • Understanding of seismic wave types: P-waves and S-waves
  • Knowledge of wave propagation speeds in geology
  • Basic principles of distance calculation using time and speed
  • Familiarity with seismic recording stations and their functions
NEXT STEPS
  • Study the mathematical formula for calculating distance using wave speeds and time delays
  • Learn about seismic wave propagation in different geological materials
  • Explore the role of seismic stations in earthquake monitoring
  • Investigate advanced earthquake modeling techniques and their applications
USEFUL FOR

Geologists, seismologists, students studying earth sciences, and anyone interested in understanding earthquake mechanics and wave propagation.

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Earthquakes produce several types of shock waves. The most well-known are the P-waves and the S-waves. In the earth’s crust, the P-waves travel around 6.9 km/s while the S-waves move at about 4.8 km/s. The time delay between the arrival of these two waves at a seismic recording station tells geologists how far away the earthquake occurred. If the time delay is 15 s, how far away from the seismic station did the earthquake occur?

Give your answer in kilometers to the first decimal place.



Correct Answer
236.6


I got the correct answer but I don't know how to get it... can someone explain pleaaze? :bugeye:
 
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You got the answer but you don't know how you got the answer? Please explain that! Then you might get some help. :)
 
I got it because its an online quiz that tells you the answer after you finish..

but anyway, i am done with it... i solved it myself, thanks anyway
 

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