Ocean bottom seismometers

From: Sea Technology | Date: April 1, 1999| Author: | Copyright information

New Instrument Package Demonstrates Value of Recording Full Wavefield; Shows That Interpretations of Sediment Shear Wave Velocities Are Reliable

Information about the earth's crust and mantle in offshore regions has been obtained largely from multichannel seismic experiments, sometimes supplemented in the wide-angle range by ocean bottom recorders. Most of these instruments are equipped with a hydrophone only (ocean bottom hydrophone, OBH). Restricting to the monitoring of pressure wave events is sufficient in most many cases and enables work with a relatively uncomplicated instrument.1

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CORRECTION
; CLARIFICATION: Captions with the two photographs showing the effect of fishermen's dragging equipment along the ocean bottom that appeared on the front of yesterday's Health/Science section may have left the impression that they showed the same...