Spectral Decomposition refers to any method that produces a continuous time/frequency analysis at each time sample of a seismic trace. This allows the interpreter to see amplitude and phase tuned to specific wavelengths. This tool is based on the fact that a reflection from a specific geological thin body (levee, channel, debris flows …) has a characteristic signature in the frequency domain. Thus, spectral decomposition is able to separate features with subtle petrophysical differences. It allows to quantify amplitude variation with frequency, thereby gaining insights into the distribution of sedimentary bodies, faults and fractures. Since the high-frequency response of a reflector can be attenuated by the presence of compressible fluids, spectral decomposition can also assist in the direct detection of shallow gas accumulations. Spectral decomposition, to date, has been a conventional approach for lithological interpretation of thin reservoirs. With the high-frequency content in the shallow part of a seismic cube, it may provide an additional tool for geohazard assessment at or near seabed. This paper will review the additional value of spectral decomposition for the geohazard assessment of deep-water seabed areas.