Please use this identifier to cite or link to this item:
http://hdl.handle.net/2122/1171
Authors: | Kasahara, J.* Iwase, R.* Nakatsuka, T.* Nagaya, Y.* Shirasaki, Y.* Kawaguchi, K.* Kojima, J.* |
Title: | An Experimental Multi-disciplinary observatory (VENUS) at the Ryukyu Trench using the Guam-Okinawa Geophysical Submarine Cable | Issue Date: | 15-Jun-2006 | Series/Report no.: | 2-3/49(2006) | URI: | http://hdl.handle.net/2122/1171 | Keywords: | Decommissioned submarine cables ocean bottom observatory real-time telemetry ecological monitoring,ecological monitoring junction box OBS |
Subject Classification: | 04. Solid Earth::04.02. Exploration geophysics::04.02.05. Downhole, radioactivity, remote sensing, and other methods | Abstract: | A multidisciplinary Ocean Bottom Observatory (MDOBO) was installed on VENUS (Versatile Eco-monitoring Network by Undersea-cable System) a depth of 2,170 meters on the slope of the Ryukyu Trench. In this context, “Eco-“ refers to both economic (e.g., earthquake hazard mitigation) and ecological motivation. The first step in this instillation was to insert a telemetry/power system into the submarine coaxial cable; this system could then service the MODOBO, which consist of seven major bottom sensor packages. During August-September 1999, using a deep-towed unit and both manned and unmanned submersibles coupled with precise ship navigation, the MDOBO system and its attendant cables were deployed over a range of distances from 80 m to 1 km from the telemetry system, with several meter allowance for navigational uncertainty in positioning. The unmanned submersible then extended the multi-conductor extension cables from the instrument units toward the telemetry system and connected them to undersea mateable connectors on a junction box installed on the submarine cable. The MDOBO collected one and half months of continuous records. Several kinds of useful data were collected after installation, including an aftershock (Ms=6.1) of the 1999 Chi-Chi earthquake (Ms=7.7) in Taiwan. |
Appears in Collections: | Annals of Geophysics |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
04 Kasahara.pdf | 725.47 kB | Adobe PDF | View/Open |
Page view(s)
143
checked on Mar 27, 2024
Download(s) 20
445
checked on Mar 27, 2024