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Volume 57 Supplement 4

Special Issue: Special Section for the 2004 off the Kii peninsula earthquakes (2)

Spatial distribution of centroid moment tensor solutions for the 2004 off Kii peninsula earthquakes

Earth, Planets and Space volume 57, pages 351–356 (2005)Cite this article

Abstract

Two large intraplate earthquakes (MW 7.0 and 7.3) occurred off the southeastern Kii Peninsula on September 5, 2004. We determined the centroid moment tensors of these earthquakes and their aftershocks. Earthquakes can be divided into two categories: (1) the reverse-fault type with a range in focal depth from 5 km to 20 km; and (2) earthquakes with a near-vertical nodal plane and a focal depth shallower than 5 km. Earthquakes of type (1) are distributed inside the Philippine Sea plate beneath the Nankai trough, while normal-fault events predominate in the other regions along the trough. The distribution of type (2) events shows two clear lineaments with strikes of NNW-SSE to the north and NE-SW to the west of the focal area. These lineament strikes coincide approximately with strikes at the nodal planes of such events.

References

  • Fukuyama, E., M. Ishida, D. S. Dreger, and H. Kawai, Automated seismic moment tensor determination by using on-line broadband seismic waveforms, J. Seismol. Soc. Japan (Zisin), 51, 149–156, 1998 (in Japanese with English abstract).

    Google Scholar 

  • Hara, T., Change of the source mechanism of the main shock of the 2004 off the Kii peninsula earthquakes inferred from long period body wave data, Earth Planets Space, 57, 179–183, 2005.

    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, 185–190, 2005.

    Article  Google Scholar 

  • Japan Meteorological Agency, The Seismological and Volcanological Bulletin of Japan, Japan Meteorological Agency, Tokyo, 2004.

    Google Scholar 

  • Kagan, Y. Y., 3-D rotation of double-couple earthquake sources, Geophys. J. Int., 106, 709–716, 1991.

    Article  Google Scholar 

  • Kikuchi, M., M. Nakamura, and K. Yoshikawa, Source rupture processes of the 1944 Tonankai earthquake and the 1945 Mikawa earthquake derived from low-gain seismograms, Earth Planets Space, 55, 159–172, 2003.

    Article  Google Scholar 

  • Lay, T., L. Astiz, H. Kanamori, and D. H. Christensen, Temporal variation of large intraplate earthquakes in coupled subduction zones, Phys. Earth Planet. Inter., 54, 258–312, 1989.

    Article  Google Scholar 

  • Nakanishi, A., H. Shiobara, R. Hino, J. Kasahara, K. Suyehiro, and H. Shinohara, Crustal structure around the eastern end of coseismic rupture zone of the 1944 Tonankai earthquake, Tectonophysics, 354, 257–275, 2002.

    Article  Google Scholar 

  • Obara, K. and Y. Ito, Very low frequency earthquakes excited by the 2004 off the Kii peninsula earthquakes: A dynamic deformation process in the large accretionary prism, Earth Planets Space, this issue, 57, 321–326, 2005.

    Article  Google Scholar 

  • Okada, Y., K. Kasahara, S. Hori, K. Obara, S. Sekiguchi, H. Fujiwara, and A. Yamamoto, Recent progress of seismic observation networks in Japan—Hi-net, F-net, K-NET, and KiK-net, Earth Planets Space, 56, xv–xxviii, 2004.

    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, 173–178, 2005.

    Article  Google Scholar 

  • Seno, T., S. Stein, and A. E. Grippe, A model for the motion of the Philippine Sea plate consistent with NYVEL-1 and geological data, J. Geophys. Res., 98, 17941–17948, 1993.

    Article  Google Scholar 

  • Shiomi, K., K. Obara, S. Aoi, and K. Kasahara, Estimation on the azimuth of the Hi-net and KiK-net borehole seismometers, J. Seismol. Soc. Jpn. (Zisin), 56, 99–110, 2003 (in Japanese).

    Google Scholar 

  • Utsu, T., Seismology, second edition, 310 pp., Kyoritsu Syuppan, Tokyo, 1984 (in Japanese).

    Google Scholar 

  • Wessel, P. and W. H. F. Smith, New version of the generic mapping tools released, EOS Trans. AGU, 76, 329, 1995.

    Article  Google Scholar 

Download references

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Authors and Affiliations

  1. National Research Institute for Earth Science and Disaster Prevention, 3-1, Tennodai, Tsukuba, Ibaraki, 305-0006, Japan

    Yoshihiro Ito, Takumi Matsumoto, Hisanori Kimura, Hirotoshi Matsubayashi, Kazushige Obara & Shoji Sekiguchi

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  1. Yoshihiro Ito
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  2. Takumi Matsumoto
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  3. Hisanori Kimura
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  4. Hirotoshi Matsubayashi
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  5. Kazushige Obara
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  6. Shoji Sekiguchi
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Correspondence to Yoshihiro Ito.

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Ito, Y., Matsumoto, T., Kimura, H. et al. Spatial distribution of centroid moment tensor solutions for the 2004 off Kii peninsula earthquakes. Earth Planet Sp 57, 351–356 (2005). https://doi.org/10.1186/BF03352575

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  • DOI: https://doi.org/10.1186/BF03352575

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