The last 30 years have seen ever-increasing amounts of seismic data being acquired. It is now common to see 12 or more streamers deployed with a single seismic vessel, ocean-bottom sensors deployed by the thousands, or land surveys with channel counts into the many tens of thousands. The volume of data has been defined not only by the sensor density but also by the number of components recorded at each location. Radial data coverage has grown from narrow azimuth to multiazimuth to wide azimuth to full azimuth. A higher sensor count has only been a part of the data explosion story. Source effort has evolved as well, with continuous recording and a variety of simultaneous-source schemes being utilized. Data density and field effort have grown, and continue to grow, with the imaging and interpretational demands of the industry.

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