1. 1998-2000 Hokkaido Transect Seismic Refraction/
Wide-angle Reflection Line
Seismic Reflection Line
Multi-disciplinary Project
Large scale structural variation
from NJA to KA
Deeper structure of
Hidaka Collision Zone
3D crustal inhomogeneity
Features of crustal activity

2. 1. Reflection Analysis CRS (Common Reflection Surface Method) and
MDRS (Multi-dip Reflection Surfaces Method)

3. H
HMT W E
Conventional (CMP stacking)
CRS/MDRS stacking

5. Hidaka 99
Iwasaki et al. (2004)

6. S3002 (1999 Seismic Line)
Fault zone