There aren't any "Quiet" signs in Seitel's library, which consists of more than 43,000 sq. miles of 3-D and about 1.1 million linear miles of 2-D seismic data. The data, which is used to locate oil and gas, primarily covers the Gulf of Mexico, the US Gulf Coast, and western Canada. The company contracts with third-party seismic crews to gather data but handles the processing itself through its Olympic Seismic, Seitel Data, Seitel Matrix, Seitel Solutions business units. The bulk of Seitel's total revenues comes from the acquisition and licensing of seismic data. The balance is primarily generated by its Seitel Solutions subsidiary, which gives customers access to the company's seismic database.