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).
