A METHOD FOR UNDERTAKING MARINE, SEISMIC MEASUREMENTS, AS WELL AS A SEISMIC SEA-BED CABLE FOR CARRYING OUT SAID METHOD

摘要

A method for carrying out marine seismic surveys by using a seismic cable comprising a cable and sensors for detecting seismic signals, said sensors comprising geophone units which rest in the measuring positions on the ocean floor during measurement of the seismic signals and where the seismic cable is moved along the seabed to its next measuring position between the measurements. Before measurements are taken the geophone units are subjected to vibrations so that the geophone units assume a position in good contact with the ocean floor and dig themselves down into it. The invention also comprises a seismic cable for carrying out the method. Here the geophone units are loosely attached within the frame structure and are equipped with at least one vibrator which is powered via the cable.