Skip to main content

Advertisement

We’d like to understand how you use our websites in order to improve them. Register your interest.

Elastic and inelastic strains in the Japanese Islands deduced from GPS dense array

Abstract

To estimate the elastic and inelastic strains in the Japanese Islands, we used horizontal velocity vectors at 917 sites of the nation-wide GPS network for the period April 1996 to March 1998. To segregate the signal and noise in the velocity vectors, we employed the Least-Squares Prediction technique (LSP). Estimated signals (displacement vectors) were differentiated in space to reconstruct the total strains (elastic plus inelastic). Then, we estimated inelastic strains of the islands using the inversion method introduced by Hori et al. (1999). The estimated rate of inelastic strains is of the order of 10−3 μstrains/yr. Compared this with the rate of total strains of the order of 0.1 μstrains/yr, inelastic part was found to be negligible. Finally, shear stresses at the surface of the Japanese Islands have been estimated, based on the elasticity theory.

References

  1. El-Fiky, G. S. and T. Kato, Continuous distribution of the horizontal strain in the Tohoku district, Japan, deduced from least squares prediction, J. Geodynamics, 27, 213–236, 1999a.

    Article  Google Scholar 

  2. El-Fiky, G. S. and T. Kato, Interplate coupling in the Tohoku district, Japan, deduced from geodetic data inversion, J. Geophys. Res., 104, 20,361–20,377, 1999b.

    Article  Google Scholar 

  3. El-Fiky, G. S., T. Kato, and Y. Fujii, Distribution of the vertical crustal movement rates in the Tohoku district, Japan, predicted by least-squares collocation, J. Geodesy, 71, 432–442, 1997.

    Article  Google Scholar 

  4. El-Fiky, G. S., T. Kato, and E. N. Oware, Crustal deformation and interplate coupling in the Shikoku district, Japan, as seen from continuous GPS Observation, J. Tectonophys., 314, 387–399, 1999.

    Article  Google Scholar 

  5. Geographical Survey Institute, Crustal movements in the Kyushu district, 58, 638–652, 1997.

    Google Scholar 

  6. Heki, K., S. Miyazaki, and H. Tsuji, Silent fault slip following an interplate thrust earthquake at the Japan trench, Nature, 386, 595–598, 1997.

    Article  Google Scholar 

  7. Heki, K., S. Miyazaki, H. Takahashi, M. Kasahara, F. Kimata, S. Miura, N. Vasilenko, A. Ivashchenko, and Ki-Dok An, The Amurian Plate motion and current plate kinematics in eastern Asia, J. Geophys. Res., 104, 29,147–29,155, 1999.

    Article  Google Scholar 

  8. Hirose, H., K. Hirahara, F. Kimata, N. Fujii, and S. Miyazaki, A slow thrust slip event following the two 1996 Hyuganada earthquakes beneath the Bungo Channel, southwest Japan, Geophys. Res. Lett., 26, 3237–3240, 1999.

    Article  Google Scholar 

  9. Hori, M., T. Kameda, and N. Hosokawa, Formulation of identifying material property distribution based on equivalent inclusion method, J. Struct. Mech. Earthquake Eng., JSCE, 619, I–47, 1999.

    Google Scholar 

  10. Ishikawa, N. and M. Hashimoto, Average horizontal crustal strain rates in Japan during interseismic period deduced from geodetic surveys (part 2), Zishin, 52, 299–315, 1999 (in Japanese).

    Google Scholar 

  11. Kasahara, K. and T. Kato, Aseismic faulting following the 1973 Nemurooki earthquake, Hokkaido, Japan (a retrospective study), Purer Apple. Geophys., 119, 392–403, 1981.

    Article  Google Scholar 

  12. Kato, T., G. S. El-Fiky, E. N. Oware, and S. Miyazaki, Crustal strains in the Japanese islands as deduced from dense GPS array, Geophys. Res. Lett., 25, 3445–3448, 1998.

    Article  Google Scholar 

  13. Miyazaki, S., T. Saito, M. Sasaki, Y. Hatanaka, and Y. Iimura, Expansion of GSI’s nationwide GPS array, Bull. Geogr. Surv. Inst., 43, 23–34, 1997.

    Google Scholar 

  14. Miyazaki, S., T. Tada, T. Sagiya, D. Dong, and J. Johnson, Regional crustal deformation of Japan derived by Japanese GPS array, Eos Trans., AGU, 79, F186, 1998.

    Google Scholar 

  15. Richtmyer, R. D. and K. M. Morton, Difference Methods for Initial Value Problems, 405 pp., New York, Wiley-interscience, 1967.

    Google Scholar 

  16. Sagiya, T., Boso Peninsula silent earthquake of May 1996, Eos Trans., 78, F165, 1997.

    Google Scholar 

  17. Shen-Tu, B. and W. E. Holt, Interseismic horizontal deformation in northern Honshu and its relationship with the subduction of the Pacific plate in the Japan trench, Geophys. Res. Lett., 23, 3103–3106, 1996.

    Article  Google Scholar 

  18. Shen-Tu, B., W. E. Holt, and A. J. Haines, Intraplate deformation in the Japanese Island: A kinematic study of intraplate deformation at a convergent plate margin, J. Geophys. Res., 100, 24,275–24,293, 1995.

    Article  Google Scholar 

  19. Tabei, T., T. Ozawa, and Y. Date, Crustal deformation at the Nankai subduction zone, southwest Japan, derived from GPS measurements, Geophys. Res. Lett., 23, 3059–3062, 1996.

    Article  Google Scholar 

  20. Tada, T., Spreading of the Okinawa trough and its relation to the crustal deformation in Kyushu, Zishin, 37, 407–415, 1984 (in Japanese).

    Google Scholar 

  21. Tsuji, H., Y. Hatanaka, T. Sagiya, and M. Hashimoto, Coseismic crustal deformation from the 1994 Hokkaido-Toho-oki earthquake monitored by a nationwide continuous GPS array in Japan, Geophys. Res. Lett., 22, 1669–1672, 1995.

    Article  Google Scholar 

Download references

Author information

Affiliations

Authors

Corresponding author

Correspondence to Gamal S. El-Fiky.

Rights and permissions

Reprints and Permissions

About this article

Verify currency and authenticity via CrossMark

Cite this article

El-Fiky, G.S. Elastic and inelastic strains in the Japanese Islands deduced from GPS dense array. Earth Planet Sp 52, 1107–1112 (2000). https://doi.org/10.1186/BF03352339

Download citation

Keywords

  • Crustal Deformation
  • Okinawa Trough
  • Inelastic Strain
  • Japanese Island
  • Nankai Trough