| Co-Investigator(Kenkyū-buntansha) |
VANYAN Leonid Shirshov Institute of Oceanography, Russian Academy of Sciences, Shirshov海洋研究所, 教授
MEDZHITOV Renat Pacific Oceanographic Institute, Russian Academy of Sciences, 太平洋海洋研究所, 教授
YURASOV Gennady Pacific Oceanographic Institute, Russian Academy of Sciences, 太平洋海洋研究所, 教授
LARSEN Jimmy Pacific Marine Environmental Laboratory, NOAA, 太平洋海洋環境研究所, 主任研究員
CHAVE Alan Woods Hole Oceanographic Institution, 主任研究員
RIKIISHI Kunio Department of Earth Sciences, Hirosaki University, 理学部, 教授 (70038561)
HASHIMOTO Yoshio Research Institute for Applied Mechanics, Kyushu University, 応用力学研究所, 助教授 (80180842)
KAWATATE Kazuo Research Institute for Applied Mechanics, Kyushu University, 応用力学研究所, 教授 (40038534)
SHIMAMURA Hideki Laboratoryy for Ocean Bottom Seismology, Hokkaido University, 理学部, 教授 (10011636)
TAIRA Keisuke Ocean Research Institute, University of Tokyo, 海洋研究所, 教授 (50013579)
YAMANO Makoto Earthquake Research Institute, University of Tokyo, 地震研究所, 助教授 (60191368)
UTADA Hisashi Earthquake Research Institute, University of Tokyo, 地震研究所, 助教授 (70134632)
KASAHARA Junzo Earthquake Research Institute, University of Tokyo, 地震研究所, 教授 (70012953)
VON Huene Ro GEOMAR研究所, 教授
TALWANIR Man Rice大学, 教授
DUNNEBIER Fr Hawaii大学, 教授
MOORE Casey California大学, Santa Cruz校, 教授
KASTNER Miri California大学, Scripps海洋研究所, 教授
HILDEBRAND J California大学, Scripps海洋研究所, 教授
CHACE Alan Woods Hole海洋研究所, 教授
OSTROVSKII A 九州大学, 応用力学研究所, 助教授 (70243962)
尹 宗煥 九州大学, 応用力学研究所, 助教授 (80111459)
竹松 正樹 九州大学, 応用力学研究所, 教授 (50038535)
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| Budget Amount *help |
¥9,200,000 (Direct Cost: ¥9,200,000)
Fiscal Year 1996: ¥3,300,000 (Direct Cost: ¥3,300,000)
Fiscal Year 1995: ¥5,900,000 (Direct Cost: ¥5,900,000)
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| Research Abstract |
Japan Sea Cable (JASC), a submarine telecommunication cable across the Japan Sea, retired in 1995 and was transferred to the Earthquake Research Institute, University of Tokyo and the Russian Academy of Sciences for scientific reuse.
In January, 1996, we installed a voltage monitoring system at Nakhodka cable station (Russian end of the JASC) and started to measure the voltage between the Russian and Japanese coasts across the Japan Sea. We will analyze the voltage data together with the geomagnetic field data on land in order to estimation the electrical conductivity structure beneath the Japan Sea. The voltage data will give useful information on the water mass transport across the JASC as well.
We have been measuring the electric potential difference for the cables between Hamada and Pusan and across the Tsugaru Strait. The data were analyzed with oceanographic data such as sea level and current meter measurements. It was found that the voltage variations are correlated well with the surface currents and the volume transports. We also started to measure the voltage between Kyushu and Iki island in October, 1996.
In the future, we expect to install geophysical observatories on the bottom of the Japan Sea and to monitor the data in real-time through the JASC.We have actually developed a submarine cable OBS (ocean bottom seismometer) and deployed it on the landward slope of the Izu-Bonin Trench in January, 1997. The OBS was connected to a cable between Ninomiya and Guam. It is working properly and we can monitor the data at Ninomiya cable station. This successful experiment demonstrated that technology for a submarine cable geophysical station has been established.
Japanese and Russian scientists visited each other to discuss how to conduct cooperative works using the JASC in geomagnetic, oceanographic, and seismic studies. We also participated international meetings and held international workshops for general discussions on scientific use of submarine cables.
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