The term "normal moveout curve" refers to a plot of the travel time of reflected seismic waves against the offset distance between the source and receiver. It is a crucial element in the processing of seismic data used to locate subsurface oil and gas deposits. Synonyms for normal moveout curve include "NMO curve," "normal incidence curve," and "reflection travel time curve." Additionally, some may refer to it as the "CMP curve," referencing the common midpoint location of the source and receiver. Regardless of the terminology used, understanding and interpreting the normal moveout curve is essential to accurately assessing subsurface structures and identifying potential hydrocarbon reservoirs.