- Open Access
Three-dimensional P and S wave velocity structures beneath the Hokkaido corner, Japan-Kurile arc-arc junction
Earth, Planets and Space volume 58, pagese37–e40(2006)
We applied an inverse method developed by Zhao et al. (J. Geophys. Res., 97, 19909–19928, 1992) to 42,834 P and 18,263 S wave arrival time data observed at 152 seismographic stations for 1143 local earthquakes at depths between 0 and 200 km in order to estimate three-dimensional P and S wave velocity structures beneath the Hokkaido corner, Japan-Kurile arc-arc junction. High- and low-velocity zones were clearly imaged in the Hidaka Mountain Range at depths shallower than 35 km. The low-velocity anomalies of P and S waves were found to be distributed in the mantle wedge at depths between 35 and 100 km beneath the volcanic front, as also observed in the Tohoku region. Another low-velocity zone was found to exist in the fore-arc region at depths of 50–70 km above the plate boundary; this zone was not detected in Tohoku, suggesting that the dehydration process in the fore-arc region is different from that in the Tohoku region.
Arita, K., T. Ikawa, T. Ito, A. Yamamoto, M. Saito, Y. Nishida, H. Satoh, G. Kimura, T. Watanabe, T. Ikawa, and T. Kuroda, Crustal structure and tectonic of the Hidaka Collision Zone, Hokkaido (Japan), revealed by vibroseis seismic reflection and gravity surveys, Tectonophysics, 290, 197–210, 1998.
DeMets, C., Oblique convergence and deformation along the Kuril and Japan trenches, J. Geophys. Res., 97, 17615–17625, 1992.
DeMets, C., R. G. Gordon, D. F. Argus, and S. Stein, Effect of recent revisions to the geomagnetic reversal time scale on estimation of current plate motions, Geophys. Res. Lett., 21, 2191–2194, 1994.
Hirata, N., Panel on Earthquake Research, paper presented at the Third Joint Meeting, U.S.-Japan Natural Resources, Menlo Park, California, USA, November 13 to 15, 2000.
Katsumata, K., N. Wada, and M. Kasahara, Newly imaged shape of the deep seismic zone within the subducting Pacific plate beneath the Hokkaido corner, Japan-Kurile arc-arc junction, J. Geophys. Res., 108(B12), 2565, 2003.
Kimura, G., Collision orogeny at arc-arc junctions in the Japanese Islands, The Island Arc, 5, 262–275, 1996.
Miyamachi, H. and T. Moriya, Velocity structure beneath the Hidaka Mountains in Hokkaido, Japan, J. Phys. Earth, 32, 13–42, 1984.
Miyamachi, H., M. Kasahara, S. Suzuki, K. Tanaka, and A. Hasegawa, Seismic velocity structure in the crust and upper mantle beneath northern Japan, J. Phys. Earth, 42, 269–301, 1994.
Murai, Y., S. Akiyama, K. Katsumata, T. Takanami, T. Yamashina, T. Watanabe, I. Cho, M. Tanaka, A. Kuwano, N. Wada, H. Shimamura, I. Furuya, D. Zhao, and R. Sanda, Delamination structure imaged in the source area of the 1982 Urakawa-oki earthquake, Geophys. Res. Lett., 30, 43–4, 2003.
Nakajima, J., T. Matsuzawa, A. Hasegawa, and D. Zhao, Three dimensional structures of Vp, Vs, and Vp/Vs beneath the northeastern Japan arc: implications for arc magmatism and fluids, J. Geophys. Res., 106, 21843–21857, 2001.
Nakajima, J. Y. Takei, and A. Hasegawa, Quantitative analysis of the inclined low velocity zone in the mantle wedge of northeastern Japan: A systematic change of melt-filled pore shapes with depth and its implications for melt migration, Earth Planet Sci. Lett., 234, 59–70, 2005.
Ogiso, M, K. Yomogida, and K. Katsumata, Recursive travel-time inversion: A tool for real-time seismic tomography, Earth Planets Space, 57, 477–489, 2005.
Onizawa, S., H. Mikada, H. Watanabe, and S. Sakashita, A method for simultaneous velocity and density inversion and its application to exploration of subsurface structure beneath Izu-Oshima volcano, Japan, Earth Planets Space, 54, 803–817, 2002.
Research Group for Explosion Seismology, Seismic refraction/wide-angle reflection experiment across the Hidaka Collision Zone, Hokkaido (Ohtaki-Urahoro profile), Bull. Earthq. Res. Inst. Univ. Tokyo, 77, 139–172, 2002 (in Japanese).
Takahashi, H., M. Kasahara, F. Kimata, S. Miura, K. Heki, T. Seno, T. Kato,. Vasilenko, A. Ivashchenko, V. Bahtiarov, V. Levin, E. Gordeev, F. Korchagin, and M. Gerasimenko, Velocity field of around the Sea of Okhotsk and Sea of Japan regions determined from a new continuous GPS network data, Geophys. Res. Lett., 26, 2533–2536, 1999.
Takanami, T., Three-dimensional seismic structure of the crust and upper mantle beneath the orogenic belts in southern Hokkaido, Japan, J. Phys. Earth, 30, 87–104, 1982.
Tsumura, N., H. Ikawa, T. Ikawa, M. Shinohara, T. Ito, K. Arita, T. Moriya, G. Kimura, and T. Ikawa, Delamination-weage structure beneath the Hidaka Collision Zone, Central Hokkaido, Japan inferred from seismic reflection profiling, Geophys. Res. Lett., 26, 1057–1060, 1999.
Wessel, P. and W. H. F. Smith, Free software helps map and display data, Eos Trans. AGU, 72, 445–446, 1991.
Zhao, D., A tomographic study of seismic velocity structure in the Japan Islands, Ph. D. thesis, 301 pp., Tohoku Univ., Sendai, Japan, 1991.
Zhao, D. and A. Hasegawa, P wave tomographic imaging of the Crust and upper Mantle beneath the Japan Islands, J. Geophys. Res., 98, 4333–4353, 1993.
Zhao, D., S. Horiuchi, and A. Hasegawa, 3-D seismic velocity structure of the crust and the uppermost mantle in the northeastern Japan arc, Tectonophysics, 181, 135–149, 1990.
Zhao, D., A. Hasegawa, and S. Horiuchi, Tomographic imaging of P and S wave velocity structure beneath northeastern Japan, J. Geophys. Res., 97, 19909–19928, 1992.
About this article
Cite this article
Katsumata, K., Wada, N. & Kasahara, M. Three-dimensional P and S wave velocity structures beneath the Hokkaido corner, Japan-Kurile arc-arc junction. Earth Planet Sp 58, e37–e40 (2006) doi:10.1186/BF03352595
- P and S wave velocity structures
- Hidaka Mountain Range
- volcanic front
- mantle wedge
- dehydration process