Recently, Ocean Bottom seismographs (OBS) self-developed by the Institute of Geology and Geophysics, CAS (IGGCAS) participate in the exploration voyage of the South China Sea, which is undertook by the Institute of South China Sea, CAS, founded by National Science Foundation.

The instruments are used in large quantities for the first time more than 4,000 meters water depth of the central basin in the South China Sea. OBS run 52 times in voyage, all successfully recovered.

Chief Scientist, Professor QIU Xuelin evaluates the domestic OBS has reached the international advanced level.

Fig1. Central Basin OBS array and the distribution of shooting survey lines. (Image by IGGCAS)

Fig2. Trackof actualshooting in the firstleg. (Image by IGGCAS)

Fig3. Distribution of test lines and stations in the second leg. (Image by IGGCAS)

Fig4. All 32 OBSput in the central basin are successful recovered. (Image by IGGCAS)

Fig5. OBS being put. (Image by IGGCAS)

Fig6. Well installed OBS waiting for running again. (Image by IGGCAS)