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Volume 57 Supplement 3

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

Long-period ground motion simulation in the Kinki area during the MJ 7.1 foreshock of the 2004 off the Kii peninsula earthquakes

Abstract

Long-period (5–20 s) ground motion simulations in the Kinki area during the MJ 7.1 foreshock of the 2004 off the Kii peninsula earthquakes are performed. We construct a three-dimensional underground structure model that includes the source region and Osaka basin area to confirm propagation-path effects of crustal structure on long-period ground motions. Finite difference (FD) simulations by our three-dimensional underground structure model agree well with long-period observed ground motions at several rock sites in the Kinki area. We found that a sedimentary wedge structure along the Nankai trough amplifies and elongates long-period ground motions from this event. We also examine the effect of source depth for this event by comparing the observed with synthetic waveforms. These results suggest that precise modeling of the shallower parts of the underground structure, such as the sedimentary wedge, are quite important for long-period ground motion simulation of the hypothetical Nankai and Tonankai earthquakes.

References

  1. Coffin, M. and N. Hirata, Large earthquake strikes Hokkaido, Japan, EOS Trans. AGU, 84, 442, 2003.

    Article  Google Scholar 

  2. Furumura, T., B. L. N. Kennett, and K. Koketsu, Visualization of 3D wave propagation from the 2000 Tottori-ken Seibu, Japan, Earthquake: Observation and numerical simulation, Bull. Seism. Soc. Am., 93, 870–881, 2003.

    Article  Google Scholar 

  3. Graves, R. W., Simulating seismic wave propagation in 3D elastic media using staggered-grid finite differences, Bull. Seism. Soc. Am., 86, 1091–1106, 1996.

    Google Scholar 

  4. Hayakawa, T., T. Furumura, and Y. Yamanaka, Simulation of strong ground motions caused by the 2004 off the Kii peninsula earthquakes, Earth Planets Space, 57, this issue, 191–196, 2005.

    Article  Google Scholar 

  5. Iwata, T., K. Asano, N. Yamada, and W. Suzuki, Long-period ground motion characteristics in Osaka basin during the 2004 Kii-Hanto-Nanto-Oki earthquake, Ann. Meeting of Seism. Soc. Japan, PK21, 2004 (in Japanese).

    Google Scholar 

  6. Japan Meteorological Agency, Monthly report on earthquake and volcanoes in Japan, December 2004, 142 pp., 2004 (in Japanese).

    Google Scholar 

  7. Kagawa, T., B. Zhao, K. Miyakoshi, and T. Akazawa, A procedure of modeling basin structure used for trong ground motion evaluation from any amount of given information—Case study for the Osaka basin, Proc. 11th Japan Earthquake Engineering Symposium, 497–500, 2002 (in Japanese).

    Google Scholar 

  8. Koketsu, K., K. Hatayama, T. Furumura, Y. Ikegami, and S. Akiyama, Damaging long-period ground motions from the 2003 Mw 8.3 Tokachioki, Japan, earthquake, Seism. Res. Lett., 76, 58–64, 2005.

    Article  Google Scholar 

  9. Miyake, H. and K. Koketsu, Long-period ground motions from a large off-shore earthquake: The case of the 2004 off the Kii peninsula earthquake, Japan, Earth Planets Space, 57, this issue, 203–207, 2005.

    Article  Google Scholar 

  10. Nakamura, M., H. Watanabe, T. Konomi, S. Kimura, and K. Miura, Characteristics activities of subcrustal earthquakes along the outer zone of southwestern Japan, Annuals of Disas. Prev. Res. Inst., Kyoto Univ., 40 B1, 1–20, 1997 (in Japanese).

    Google Scholar 

  11. Nakanishi, A., N. Takahashi, J. Park, S. Miura, S. Kodaira, Y. Kaneda, N. Hirata, T. Iwasaki, and M. Nakamura, Crustul structure across the coseismic rupture zone of the 1944 Tonankai earthquake, the central Nankai Trough seismogenic zone, J. Geophys. Res., 107, doi:10.1029/2001JB000424, 2002.

  12. Obana, K., S. Kodaira, Y. Kaneda, K. Mochizuki, M. Shinohara, and K. Suyehiro, Microseismicity at the seaward updip limit of the western Nanki Trough seismogenic zone, J. Geophys. Res., 108, 2459, doi:10.1029/2002JB002370, 2003.

    Article  Google Scholar 

  13. Yagi, Y., http://iisee.kenken.go.jp/staff/yagi/eq/Japan20040905/Japan20040905_1-j.html, 2004 (in Japanese).

  14. Yamada, N. and T. Iwata, Long-period ground motion simulation in Kinki area, Annals of Disas. Prev. Res. Inst., Kyoto Univ., 47 C, 149–155, 2004.

    Google Scholar 

  15. Yamada, N. and H. Yamanaka, Comparison of performance of 3D subsurface structural models in the southern part of the Kanto plain for strong ground motion—Examination using an earthquake (MJMA 4.1) in the west of Kanagawa prefecture of May 22, 1999, Zisin (J. Seism. Soc. Japan), 53, 313–324, 2001 (in Japanese).

    Google Scholar 

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

    Article  Google Scholar 

  17. Zhao, D., A. Hasegawa, and H. Kanamori, Deep structure of Japan subduction zone as derived from local, regional, and teleseismic events, J. Geophys. Res., 99, 22313–22329, 1994.

    Article  Google Scholar 

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Correspondence to Nobuyuki Yamada.

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Yamada, N., Iwata, T. Long-period ground motion simulation in the Kinki area during the MJ 7.1 foreshock of the 2004 off the Kii peninsula earthquakes. Earth Planet Sp 57, 197–202 (2005). https://doi.org/10.1186/BF03351815

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  • DOI: https://doi.org/10.1186/BF03351815

Key words

  • Long-period ground motion simulation
  • foreshock of the 2004 off the Kii peninsula earthquakes
  • Kinki area
  • FDM
  • underground structure model