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<p>such as Polarcus, whilst companies that were seismic acquisition industry leaders just ten years ago such as CGG and WesternGeco have now removed themselves from the seismic acquisition environment entirely and restructured to focus upon their existing seismic data libraries, seismic data management and non-seismic related oilfield services.</p>

<p><big>Summary of the method</big></p>
<p><a href="page.php?w=Seismic_wave">Seismic wave</a>s are mechanical perturbations that travel in the Earth at a speed governed by the <a href="page.php?w=acoustic_impedance">acoustic impedance</a></p><p>
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