Triangulating an earthquake epicenter
To determine the distance between a recording station and an earthquake epicenter, seismologists use a travel-time graph. Time is the difference between the arrival of P and S waves.
In this example the first P wave arrives 4 minutes before the first S wave, so the earthquake occurred how many kilometers from the recording station? (Click on the correct answer).
In this example the difference in arrival time of P and S waves is 5 minutes. The distance to the earthquake epicenter is 3500 kilometers.
Determine the difference in the arrival times of the P and S waves using the seismogram below. How far is the epicenter from a recording station located in Nagpur, India?
(Click on the correct answer).
Next, note the difference in the arrival times of P and S waves shown in the seismogram below. Using the travel-time graph at right determine the distance from the earthquake to a seismic station located in Darwin, Australia.
(Click on the correct answer).
Now determine the distance from the earthquake to a seismic station in Paris, France.
(Click on the correct answer).