If you know the length between the P&S waves and you have 3 seismograph proofs, can you predict the epicenter?

Question

My teacher said that this question is not as simple as it sounds. Could you please explain your answer to me in detail?
Thank You.

Answer 1

I think you mean the time differential between P and S waves. If you know the time differential, you can determine the distance from the seismograph to the epicenter. This is because the differential velocity is known (p-waves travel faster). If you have three seismographs, you can locate the epicenter on a map by drawing circles of radius equal to the calculated distance from each. Where the circles intersect is the epicenter.