A new approach to geophysical real-time measurements on a deep-sea floor using decommissioned submarine cables
-
- Kasahara Junzo
- Earthquake Research Institute, University of Tokyo
-
- Sato Toshinori
- Earthquake Research Institute, University of Tokyo
-
- Momma Hiroyasu
- JAMSTEC (Japan Marine Science and Technology Center)
-
- Shirasaki Yuichi
- KDD R & D Laboratories
Bibliographic Information
- Other Title
-
- new approach to geophysical real-time measurements on a deep-sea floor using decommissioned submarine cables
Search this article
Abstract
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.
Journal
-
- Earth, Planets and Space
-
Earth, Planets and Space 50 (11-12), 913-925, 1998
Society of Geomagnetism and Earth, Planetary and Space Sciences, The Seismological Society of Japan, The Volcanological Society of Japan , The Geodetic Society of Japan , The Japanese Society for Planetary Sciences
- Tweet
Details 詳細情報について
-
- CRID
- 1390282681485847296
-
- NII Article ID
- 10003736422
- 130003955893
-
- NII Book ID
- AA11211921
-
- ISSN
- 18805981
- 13438832
-
- NDL BIB ID
- 1951584
-
- Text Lang
- en
-
- Data Source
-
- JaLC
- NDL
- Crossref
- CiNii Articles
-
- Abstract License Flag
- Disallowed