Through a combination of interactive interpretation and powerful automated tracking, horizons can be interpreted efficiently on every available trace in a 3D seismic suvrey. Horizon-related seismic attributes then are extracted and processed to enhance interpretation. Dip and azimuth attributes play an important role in this respect. They enable an interpreter to map subtle trace-to-trace variations in event time or reflection character. Areal pattern analysis leads to detailed interpretations of structure (faults and flexures) and stratigraphy (channels and fans) and to the recognition of geophysical artifacts (statics, acquisition effects, and noise).