A new approach to geophysical real-time measurements on a deep-sea floor using decommissioned submarine cables
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- Kasahara Junzo
- Earthquake Research Institute, University of Tokyo
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- Sato Toshinori
- Earthquake Research Institute, University of Tokyo
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- Momma Hiroyasu
- JAMSTEC (Japan Marine Science and Technology Center)
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- Shirasaki Yuichi
- KDD R & D Laboratories
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- new approach to geophysical real-time measurements on a deep-sea floor using decommissioned submarine cables
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In order to better understand earthquake generation, tectonics at plate boundaries, and better image the Earth's deep structures, real-time geophysical measurements in the ocean are required. We therefore attempted to use decommissioned submarine cables, TPC-1 and TPC-2. An OBS was successfully linked to the TPC-1 on the landward slope of the Izu-Bonin Trench in 1997. The OBS detected co-seismic and gradual changes during a Mw 6.1 earthquake just below the station at 80 km depth on November 11, 1997. A pressure sensor co-registered a change equivalent to 50 cm sea-level change. This suggests a high possibility detecting silent earthquakes or earthquake precursors if they exist. A multi-disciplinary geophysical station has been developed for deep-sea floor using TPC-2 since 1995. The station comprises eight instrument sets: broadband seismometers, geodetic measurements, hydrophone array, deepsea digital camera, CTD, etc. These activities are examples that decommissioned submarine cables can be great global resources for real-time cost-effective geophysical measurements on a deep-sea floor.
収録刊行物
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- Earth, Planets and Space
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Earth, Planets and Space 50 (11-12), 913-925, 1998
地球電磁気・地球惑星圏学会 、公益社団法人 日本地震学会、特定非営利活動法人 日本火山学会、日本測地学会、日本惑星科学会
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詳細情報 詳細情報について
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- CRID
- 1390282681485847296
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- NII論文ID
- 10003736422
- 130003955893
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- NII書誌ID
- AA11211921
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- ISSN
- 18805981
- 13438832
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- NDL書誌ID
- 1951584
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
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