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Seismic Project Information EW9907
Nankai Trough SW Japan

The western Nankai 3-D experiment was conducted in 1999 on the R/V Maurice Ewing Legs 7 (EW9907) and 8 (EW9908). This is a collaborative project between UTIG, University of Hawaii, University of California, Santa Cruz, University of Tokyo, Japanese Geological Survey and STA JAMSTEC. The project consists of 81 dip lines ( Line numbers 92 through 172) each 80 km long with a shot spacing of 50 m. The streamer was 240 channels, 6 km long. There are also a few lines outside of the region, lines Nan-1 (the first line shot and has no navigation), 19, 20, 40, 42, and 50. Two 3-D data volumes are available, one a pre-stack time migration and the other a pre-stack depth migration. The goal of the study is to examine changes in physical properties along the thrust as it changes from aseismic to seismic expression. Understanding this transition from compaction and aseismic slip to brittle failure is a major unknown in understanding lithospheric consumption and earthquake dynamics.

Nathan L. Bangs
Shin'ichi Kuramoto
Chief Scientists:
Nathan L. Bangs (NSF 9730637)
Thomas H. Shipley (NSF 9730637)
J. Casey Moore (NSF 9802264)
Gregory F. Moore (NSF 9802295)
Julia K. Morgan (NSF 9802295)
Asahiko Taira
Shin'ichi Kuramoto
Principal Investigators:
Institute for Geophysics, University of Texas at Austin
University of California, Santa Cruz
School of Ocean and Earth Science and Technology, University of Hawaii
Geological Survey of Japan
Ocean Research Institute, University of Tokyo
Data Originating Institutions:
Geological Survey of Japan
National Science Foundation
Ocean Research Institute, University of Tokyo
Funding Agencies:
Unrestricted access.
Seismic Data Types Acquired:
Seismic Data Classes at UTIG:
Seismic Data Types at UTIG:
doi: 10.1594/IEDA/500178 Seismic:Active:MCS-3D:Processed
Seismic Data Set DOI(s) at UTIG:
Other related data for this program at LDEO:

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