|Technical Report, Volume 1:
Nankai Trough Seismo-genic Zone Site Survey: Kumano Basin Seismic Survey, Philippine Sea, Offshore Kii Peninsula, Japan.
Taira, A., Curewitz, D., et al., 2005.
[Printable PDF, 70MB]
[Full Volume in ZIP, 509MB]
This technical report is an introduction to the ongoing site survey activities in the Kumano region of the Nankai Trough, off the east coast of the Kii Peninsula, Honshu Island, Japan. The document is designed to be a description of the data collection tools and methods, a detailed look at the onboard quality control and processing techniques, an overview of the postcruise processing procedures and techniques, and, finally, a detailed look at the exploration two-dimensional (2-D) seismic data.
|Technical Report Volume 2:|
Shimokita Area Site Survey: Northern Japan Trench Seismic Survey, Northern Honshu, Japan.
Taira, A., Curewitz, D., et al, 2005.
[Printable PDF, 93MB]
An exploration 2-D hazard/engineering site survey was conducted in 2002 in the Shimokita region, on the western flank of the Japan Trench between northern Honshu and Hokkaido, Japan. Forty-one seismic profiles (15 east-west and 26 north-south) were acquired in two areas suitable for riser drilling training operations. These data were processed and subject to initial geological interpretation, and were combined with existing geophysical, drilling, and geological data in order to provide a basis for choosing drilling sites that meet safety, operational, training, and scientific needs. Initial processing, interpretation, and combination with existing data provided the basis for developing structural and lithological models of the proposed drill sites. These data are used to lay out preliminary drilling-engineering plans for casing, drilling-mud weights, and to evaluate potential drilling hazards.