Earth, Planets and Space

, Volume 56, Issue 12, pp 1247–1252 | Cite as

Heterogeneous crustal deformation along the central-northern Itoigawa-Shizuoka Tectonic Line Fault system, Central Japan

Open Access


We investigated the crustal deformation around the northern Itoigawa-Shizuoka Tectonic Line Fault Zone by continuous observation with a dense GPS array. The observation revealed concentrated deformation around the East Matsumoto-Basin Fault while the more active Gofukuji Fault has smaller strain rate. By examining the physical meanings of geodetic strain rate and the geological slip rate data, we estimate a larger seismic potential around the Gofukuji Fault. The deep slip model proposed for the strain concentration around the Omachi area was not validated. Inelastic deformation may play an important role as a cause of strain concentration.

Key words

Itoigawa-Shizuoka Tectonic Line Fault System GPS crustal deformation strain concentration tectonic loading 


  1. Akaike, H., Information theory and an extension of the maximum likelihood principle, Proc. 2nd Inter. Symp. on Information Theory (Petrov, B. N. and Csaki, F. eds.), Akademiai Kiado, Budapest, 267–281, 1973.Google Scholar
  2. Aoyama, H., M. Takeo, and S. Ide, Evolution mechanism of an earthquake swarm under the Hida Mountains, central Japan, in 1998, J. Geophys. Res., 107, 2174, doi:10.1029/2001JB000540, 2002.CrossRefGoogle Scholar
  3. Bourne, S. J., P. C. England, and B. Parsons, The motion of crustal blocks driven by flow of the lower lithosphere and implications for slip rates of continental strike-slip faults, Nature, 391, 655–659, 1998.CrossRefGoogle Scholar
  4. Headquarters for Earthquake Research Promotion, Investigation results and evaluation of the Itoigawa-Shizuoka Tectonic Line fault system, September 11, 1996 (in Japanese).Google Scholar
  5. Hugentobler, U., S. Schaer, and P. Fridez (eds.), Bernese GPS Software Version 4.2, University of Berne, 515 pp., 2001.Google Scholar
  6. Iio, Y., T. Sagiya, Y. Kobayashi, and I. Shiozaki, Water-weakened lower crust and its role in the concentrated deformation in the Japanese Islands, Earth Planet. Sci. Lett., 203, 245–253, 2002.CrossRefGoogle Scholar
  7. Imai, T., T. Iwasaki, T. Takeda, T. Kawanaka, and H. Sato, Detailed upper crustal structure across the Itoigawa-Shizuoka Tectonic Line from the 2002 seismic expedition, Japan Earth Planet. Sci. Joint Meeting, S075–005, 2004.Google Scholar
  8. Ogawa, Y., S. Takakura, and Y. Honkura, Resistivity structure across Itoigawa-Shizuoka tectonic line and its implications for concentrated deformation, Earth Planets Space, 54, 1115–1120, 2002.CrossRefGoogle Scholar
  9. Ogawa Y. and Y. Honkura, Mid-crustal electrical conductors and their correlations to seismicity and deformation at Itoigawa-Shizuoka Tectonic Line, Central Japan, Earth Planets Space, 56, this issue, 1287–1293, 2004.CrossRefGoogle Scholar
  10. Okumura, K., Paleoseismology of the Itoigawa-Shizuoka tectonic line in central Japan, J. Seismol., 5, 411–431, 2001.CrossRefGoogle Scholar
  11. Sagiya, T., S. Miyazaki, and T. Tada, Continuous GPS array and presentday crustal deformation of Japan, PAGEOPH, 157, 2302–2322, 2000.Google Scholar
  12. Sagiya, T., T. Nishimura, Y. Iio, and T. Tada, Crustal deformation around the northern and central Itoigawa-Shizuoka Tectonic Line, Earth Planets Space, 54, 1059–1063, 2002.CrossRefGoogle Scholar
  13. Sagiya, T., A new fault model for the 1918 Omachi Earthquake—Leveling data revision and integrated interpretation of multi-disciplinary data—, Zisin, 56, 199–211, 2003 (in Japanese with English abstract).Google Scholar
  14. Sato, H., T. Iwasaki, S. Kawasaki, Y. Ikeda, N. Matsuta, T. Takeda, N. Hirata, and T. Kawanaka, Formation and shortening deformation of a back-arc rift basin revealed by deep seismic profiling, central Japan, Tectonophys., 2004 (submitted).Google Scholar
  15. Takeda, T., H. Sato, T. Iwasaki, N. Matsuta, S. Sakai, and T. Iidaka, Crustal structure in the northern part of Fossa magna region, central Japan, from refraction/wide-angle reflection data, Japan Earth Planet. Sci. Joint Meeting, S075–006, 2004.Google Scholar

Copyright information

© The Society of Geomagnetism and Earth, Planetary and Space Sciences (SGEPSS); The Seismological Society of Japan; The Volcanological Society of Japan; The Geodetic Society of Japan; The Japanese Society for Planetary Sciences. 2004

Authors and Affiliations

  • Takeshi Sagiya
    • 1
  • Takuya Nishimura
    • 2
  • Yoshihisa Iio
    • 3
  1. 1.Graduate School of Environmental StudiesNagoya UniversityChikusa-ku, NagoyaJapan
  2. 2.Geographical Survey InstituteTsukubaJapan
  3. 3.Disaster Prevention Research InstituteKyoto UniversityUjiJapan

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