Example of the reflection seismic section. The x-axis denotes the horizontal distance, the y-axis denotes the two-way running time of the seismic waves.

Example of the reflection seismic section. The x-axis denotes the horizontal distance, the y-axis denotes the two-way running time of the seismic waves. If the seismic propagation velocity is known, the running time can be converted into depth values.

Source: BGR