Answer:
To calculate distance, you measure the difference in waves as they arrive.
To determine location, you find the point of intersection.
Explanation:
This single disturbance sends out both transverse and longitudinal waves and since both waves have different speeds.
To determine the distance:
You measure the time difference in the waves as they arrive. If the difference in time is large then the distance is larger.
To determine the location of the disturbance:
If you were to call two people from different locations who have made measurements of this same event on a telephone call. Their circles can be transferred to your map. The location of the disturbance can then be determined by the point of intersection of the 3 circles.