Problem 11-42.

(a)

(b)

No, one station can only tell you how far the epicenter is from that station, and it does not have enough information to determine the direction. You can use the distance to draw a circle with the station at the center, then the epicenter can be at any point of this circle.

If you have two stations, then you can locate the epicenter to two possible points given by the intersections of the two circles from the stations. You can pin point the epicenter if you have three stations. This is a standard method used by seismologist to locate epicenter.