自己浮上型海底地震計の浮上姿勢の改善による調査の効率化

抄録

To conduct efficient seismic surveys using the pop-up ocean bottom seismographs (OBSs), we attempted attaching a metal rod (counterweight) to the OBS. As a result, the floating speed and the floating posture of the OBS improved during the OBS recovery. Since this attachment of counterweight also improved the floating posture on the sea surface, this was also effective for efficiency of the recovery operation of the OBS from the sea surface to on deck. When conducting a seismic survey using many OBSs, this method proves to be inexpensive, works very effectively, and may avoid the influence of individual differences with respect to the center of gravity and balance of each OBS.