Seismic applications > Multi component OBS

CGG (www.cgg.com) has purchased marine data during a seismic marine campaign using 4 components Ocean Bottom Seismometers laid on the sea floor. We present 4 components data (one hydrophone and 3 geophones). The maximal offset of the source is 6 km. The sampling in time is of 4 ms. The distance between two consecutive shots is of 25 m. The thickness of the water layer is of 140 m.

We show how underwater guided modes can be selected using filter with masks in the frequency - wavenumber domain.