Skip to main content
Earth, Planets and Space
Download PDF

Volume 57 Supplement 3

Special Issue: Special Section for the 2004 off the Kii peninsula earthquakes (1)

  • Letter
  • Published:

Compound fault rupture during the 2004 off the Kii Peninsula earthquake (M 7.4) inferred from highly resolved coseismic sea-surface deformation

Earth, Planets and Space volume 57, pages 167–172 (2005)Cite this article

Abstract

For a tsunami inversion analysis, we incorporated a new technique that uses many Green’s functions to improve model spatial resolution. Since this method precisely reproduces observed tsunami waveforms, we can obtain a better model of the tsunami source process. We applied the proposed method to the 2004 off the Kii Peninsula earthquake to determine what fault or faults ruptured to cause the earthquake. The estimated coseismic sea-surface deformation extended to two directions, and it was consistent with the distributions of the two aftershock swarms. Hence, we concluded that the earthquake resulted from the rupture of two faults.

References

  • Aida, I., Numerical estimation of a tsunami source, Zisin (J. Seism. Soc. Jpn.) ser 2, 25, 343–352, 1972.

    Google Scholar 

  • Geist, E. L., Origin of the 17 July 1998 Papua New Guinea tsunami: earthquake or landslide?, Seism. Res. Lett., 71, 344–351, 2000.

    Article  Google Scholar 

  • Hashimoto, M., K. Onoue, F. Ohya, Y. Hoso, K. Segawa, K. Sato, and Y. Fujita, Crustal deformations in Kii peninsula associated with the SE off the Kii peninsula earthquake sequence of September 5, 2004 derived from dense GPS observations, Earth Planets Space, 57, this issue, 185–190, 2005.

    Article  Google Scholar 

  • Ito, Y., T. Matsumoto, H. Kimura, H. Matsubayashi, K. Obara, and S. Sekiguchi, Spatial distribution of centroid moment tensors for 2004 southeastern Off-Kii Peninsula Earthquakes, Earth Planets Space, 2005 (submitted).

    Google Scholar 

  • Kato, T., Y. Terada, M. Kinoshita, H. Kakimoto, H. Isshiki, M. Matsuishi, A. Yokoyama, and T. Tanno, Real-time observation of tsunami by RTK-GPS, Earth Planets Space, 52, 841–845, 2000.

    Article  Google Scholar 

  • Kikuchi, M. and H. Kanamori, Inversion of complex body wave-III, Bull. Seism. Soc. Am., 81, 2335–2350, 1991.

    Google Scholar 

  • Kikuchi, M. and H. Kanamori, The Shikotan earthquake of October 4, 1994: lithospheric earthquake, Geophys. Res. Lett., 22, 1661–1664, 1995.

    Article  Google Scholar 

  • Kikuchi, M., Y. Yamanaka, K. Abe, and Y. Morita, Source rupture process of the Papua New Guinea earthquake of July 17, 1998 inferred from teleseismic body waves, Earth Planets Space, 51, 1319–1324, 1999.

    Article  Google Scholar 

  • Matsumoto, H. and H. Mikada, Fault geometry of the 2004 off the Kii peninsula earthquake inferred from offshore pressure waveforms, Earth Planets Space, 57, this issue, 161–166, 2005.

    Article  Google Scholar 

  • Monma, H., N. Fujiwara, R. Iwase, K. Kawaguchi, S. Suzuki, and H. Kinoshita, Monitoring system for submarine earthquakes and deep sea environment, Proc. MTS/IEEE OCEANS’97, 2, 1453–1459, 1997.

    Article  Google Scholar 

  • Okada, Y., Surface deformation due to shear and tensile faults in a halfspace, Bull. Seism. Soc. Am., 75, 1135–1154, 1985.

    Google Scholar 

  • Satake, K., Inversion of tsunami waveforms for the estimation of a fault heterogeneity: method and numerical experiments, J. Phys. Earth, 35, 241–254, 1987.

    Article  Google Scholar 

  • Satake, K., Tsunamis, in International Handbook of Earthquake and Engineering Seismology, 81A, 437–451, IASPEI, 2002.

    Article  Google Scholar 

  • Satake, K., T. Baba, K. Hirata, S. Iwasaki, T. Kato, S. Koshimura, J. Takenaka, and Y. Terada, Tsunami source of the 2004 off the Kii Peninsula earthquakes inferred from offshore tsunami and coastal tide gauges, Earth Planets Space, 57, this issue, 173–178, 2005.

    Article  Google Scholar 

  • Tanioka, Y., L. Rarry, and K. Satake, The great Kurile earthquake of October 4, 1994, tore the slab, Geophys. Res. Lett., 22, 1661–1664, 1995.

    Article  Google Scholar 

  • Tanioka, Y., K. Hirata, R. Hino, and T. Kanazawa, Slip distribution of the 2003 Tokachi-oki earthquake estimated from tsunami waveform inversion, Earth Planets Space, 56, 373–376, 2004.

    Article  Google Scholar 

  • Tappin, D. R., P. Watts, G. M. McMurtry, Y. Lafoy, and T. Matsumoto, The Sissano, Papua New Guinea tsunami of July 1998—offshore evidence on the source mechanism, Mar. Geol., 175, 1–23, 2001.

    Article  Google Scholar 

  • Wessel, P. and W. H. F. Smith, New version generic mapping tools (GMT) version 3.0 released, Eos Trans. AGU, 76, 329, 1995.

    Article  Google Scholar 

  • Yabuki, T. and M. Matsu’ura, Geodetic data inversion using a Bayesian information criterion for spatial distribution of fault slip, Geophys. J. Int., 109, 363–375, 1992.

    Article  Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Institute for Research on Earth Evolution, Japan Agency for Marine-Earth Science and Technology, 3173-25 Showa-machi, Kanazawa-ku, Yokohama, 236-0001, Japan

    Toshitaka Baba & Takane Hori

  2. Minerals and Geohazards Division, Geoscience Australia, GPO Box 378, Canberra, ACT, 2601, Australia

    R. Cummins

Authors
  1. Toshitaka Baba
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. R. Cummins
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. Takane Hori
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding author

Correspondence to Toshitaka Baba.

Rights and permissions

Reprints and permissions

About this article

Cite this article

Baba, T., Cummins, R. & Hori, T. Compound fault rupture during the 2004 off the Kii Peninsula earthquake (M 7.4) inferred from highly resolved coseismic sea-surface deformation. Earth Planet Sp 57, 167–172 (2005). https://doi.org/10.1186/BF03351810

Download citation

  • Received:

  • Revised:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1186/BF03351810

Keywords