These are various physical measurements of the nature of the reflected event which may be used for predicting rock properties or hydrocarbon presence. The attributes can be related to reflection of strength, phase, frequency or ratios/relationships with neighboring seismic traces. Advanced attributes include inversion, AVO, coherency and spectral decomposition. Attributes can give indications of: hydrocarbons especially natural gas, faults/fractures (coherency), drilling hazards, porous vs. non porous rock (sandstone vs. shale).