Toshihiko Kanazawa

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Subducting seamounts are thought to increase the normal stress between subducting and overriding plates. However, recent seismic surveys and laboratory experiments suggest that interplate coupling is weak. A seismic survey in the Japan Trench shows that a large seamount is being subducted near a region of repeating earthquakes of magnitude M approximately(More)
The mobility of the lithosphere over a weaker asthenosphere constitutes the essential element of plate tectonics, and thus the understanding of the processes at the lithosphere-asthenosphere boundary (LAB) is fundamental to understand how our planet works. It is especially so for oceanic plates because their relatively simple creation and evolution should(More)
SUMMARY Because large earthquakes have repeatedly occurred in subduction zones, it is important to observe seismic activities on the sea floor. An ocean bottom cabled seismometers (OBCS) system is the most suitable tool for this purpose since data can be obtained in real-time. Although the existing OBCS systems are useful for the study of seismic activities(More)
Material in this publication may be copied without restraint for library, abstract service, educational, or personal research purposes; however, republication of any portion requires the written consent of the Director, Any opinions, findings, and conclusions or recommendations expressed in this publication are those of the author(s) and do not necessarily(More)
  • Shipboard Scientific Party, Australia Canada, Chinese, Taipei Korea, Toshihiko Kanazawa, William W Sager +22 others
  • 2000
PUBLISHER'S NOTES This report was prepared from shipboard files by scientists who participated in the cruise. The report was assembled under time constraints and does not contain all works and findings that will appear in the Initial Reports of the ODP Proceedings. Reference to the whole or to part of this report should be made as follows: DISCLAIMER: Any(More)
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