Question

Normal moveout (NMO) for reflected phase of seismic data is 2 milliseconds. Consider the diffraction source at the edge of the same reflector, where the shot point is directly above the diffraction source. In this case, the NMO due to diffraction is \(\underline{\hspace{1cm}}\) milliseconds.

Hint:

For diffraction-based seismic data, the NMO can be calculated using the appropriate formula considering the receiver and shot point distances.

Answer 1

Correct Answer: 4

The NMO due to diffraction is given by the formula:
\[ \text{NMO} = \frac{\text{shot point location} - \text{receiver location}}{P-wave velocity} \] \[ \text{NMO} = 4 \, \text{ms} \]