Skip to main content

Japanese Seafloor Observing Systems: Present and Future

Buy Article:

$28.00 plus tax (Refund Policy)


We describe in this article Japanese efforts toward building and operating long-term seafloor observing systems. Greater details are given to those systems in which the authors have been involved. The main impetus for obtaining long-term time-series from the ocean floor in Japan has been earthquake monitoring for risk assessment and hazard mitigation. Most of the earthquake energy is released near and along the oceanic trenches offshore Japan, and large inter-plate earthquakes recur at decades to 100-year intervals, which are a great threat to the society. The first cabled observatory was laid in 1978 by the Japan Meteorological Agency to monitor seismicity in an area where a M-8 earthquake has been expected to occur. Since then, national agencies and universities established more cabled observing systems (8 systems as of 2003). The very reason of seismic activity is the plate subduction, which causes numerous geophysically interesting activities including fluid vents, biological communities, and magma movements. Realizing all these processes require long-term monitoring to lead to eventual understanding of their dynamics, efforts were made particularly at JAMSTEC to establish multiple-sensor observing systems. There are now certain directions towards the future. One is establishing monitoring systems in deep ocean boreholes, which will become possible by the new Integrated Ocean Drilling Program (2003-). Another is enabling many sensors to be deployed at an appropriate spatial density so that networks realized on land can be extended over the surrounding oceans. The third is establishing observatories as components of global networks.

Document Type: Research Article


Publication date: 2003-09-01

More about this publication?
  • The Marine Technology Society Journal is the flagship publication of the Marine Technology Society. It publishes the highest caliber, peer-reviewed papers on subjects of interest to the society: marine technology, ocean science, marine policy and education. The Journal is dedicated to publishing timely special issues on emerging ocean community concerns while also showcasing general interest and student-authored works.
  • Editorial Board
  • Submit a Paper
  • Subscribe to this Title
  • Membership Information
  • Information for Advertisers
  • Ingenta Connect is not responsible for the content or availability of external websites
  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more