P and S waves from an earthquake travel at different speeds, and this difference helps in locating the earth quake “epicenter” (where the disturbance took place)
(a) Assuming typical speeds of 8.5 km/s and 5.5km/s for P and S waves, respectively, how far away did the earth-quake occur if a particular seismic station detects the arrival of these two types of waves 2.0 min apart?
(b) Is one seismic station sufficient to determine the position of the epicenter? Explain