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Source process and near-source ground motions of the 2005 West Off Fukuoka Prefecture earthquake

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Abstract

A large shallow crustal earthquake occurred at the western off-shore of Fukuoka Prefecture, northern Kyushu, Japan, at 10:53 on March 20, 2005 (JST). Source rupture processes of the mainshock and the largest aftershock on April 20, 2005, are estimated by the kinematic waveform inversion of strong motion seismograms. The rupture of the mainshock started with relatively small slip, and the largest slip was observed at the southeast of the hypocenter. The inverted source models showed that both of the ruptures of the mainshock and the largest aftershock mainly propagated to southeast from the hypocenters, and the rupture area of those events did not overlap each other. Three-dimensional ground motion simulation by the finite difference method considering three-dimensional bedrock structure was also conducted to see the spatial variation of the near-source ground motion of the mainshock. The result of the simulation shows that expected groud motions are relatively large in and arround Genkai Island, Shikanoshima Island, and the center of Fukuoka City compared to the other area because of the rupture heterogeneity and the deep basin structure in Fukuoka City.

References

  1. Akaike, H., Likelihood and the Bayes procedure, in Bayesian Statistics, edited by J. M. Bernardo, M. H. DeGroot, D. V. Lindley, and A. F. M. Smith, pp. 143–166, University Press, Valencia, Spain, 1980.

  2. Aoi, S., K. Obara, S. Hori, K. Kasahara, and Y. Okada, New Japanese uphole/downhole strong-motion observation network: KiK-net, Seism. Res. Lett., 72, 239, 2001.

  3. Bouchon, M., A simple method to calculate Green’s functions for elastic layered media, Bull. Seism. Soc. Am., 71, 959–971, 1981.

  4. Geller, R. J., Scaling relations for earthquake source parameters and magnitudes, Bull. Seism. Soc. Am., 71, 1501–1523, 1976.

  5. Hartzell, S. H. and T. H. Heaton, Inversion of strong ground motion and teleseismic waveform data for the fault rupture history of the 1979 Imperial Valley, Carifornia, earthquake, Bull. Seism. Soc. Am., 73, 1553–1583, 1983.

  6. Horikawa, H., Rupture process of the 2005 West Off Fukuoka Prefecture, Japan, earthquake, Earth Planets Space, 58, this issue, 87–92, 2006.

  7. Karakida, Y., S. Tomita, S. Shimoyama, and K. Chijiwa, Geology of the Fukuoka District, with Geological Sheet Map at 1:50,000, 192 pp., Geological Survey of Japan, Tsukuba, 1994 (in Japanese with English summary).

  8. Kawase, H., The cause of the damage belt in Kobe: “The basin-edge effect,” constructive interference of the direct S-wave with the basininduced diffracted/Rayleigh waves, Seism. Res. Lett., 67(5), 25–35, 1996.

  9. Kennett, B. L. N. and N. J. Kerry, Seismic waves in a stratified half space, Geophys. J. Roy. Astr. Soc., 57, 557–583, 1979.

  10. Kinoshita, S., Kyoshin-net (K-NET), Seism. Res. Lett., 69, 309–332, 1998.

  11. Kobayashi, R., S. Miyazaki, and K. Koketsu, Source processes of the 2005West Off Fukuoka Prefecture earthquake and its largest aftershock inferred from strong motion and 1-Hz GPS data, Earth Planets Space, 58, this issue, 57–62, 2006.

  12. Komazawa, M., Gravity field around the source region of the 2005 west off Fukuoka earthquake, Rep. Coord. Comm. Earthq. Pred., 74, 507–509, 2005 (in Japanese).

  13. Lawson, C. L. and R. J. Hanson, Solving Least Squares Problems, 340 pp., Prentice-Hall, New Jersey, 1974.

  14. Nakamichi, S. and H. Kawase, Broadband strong motion simulation in Fukuoka City based on a three-dimensional basin structure and a hybrid method, J. Struct. Constr. Eng., AIJ, 560, 83–91, 2002 (in Japanese with English abstract).

  15. Nakata, T. and T. Imaizumi (eds.), Digital Active Fault Map of Japan, 60 pp. with 2 DVD-ROM, University of Tokyo Press, Tokyo, 2002 (in Japanese).

  16. Nishimae, Y., Observation of seismic intensity and strong ground motion by Japan Meteorological Agency and local governments in Japan, J. Jpn. Assoc. Earthq. Eng., 4, 3 (Special Issue), 75–78, 2004.

  17. Oniki, F., Precise location and subsurface features of the Kego fault in Fukuoka-city, north Kyushu, Japan, Active Fault Research, 15, 37–45, 1996 (in Japanese with English abstract).

  18. Pitarka, A., 3D elastic finite-difference modeling of seismic motion using staggered grids with nonuniform spacing, Bull. Seism. Soc. Am., 89, 54–68, 1999.

  19. Pitarka, A., K. Irikura, T. Iwata, and H. Sekiguchi, Three-dimensional simulation of the near-fault ground motion for the 1995 Hyogo-ken Nanbu (Kobe), Japan, earthquake, Bull. Seism. Soc. Am., 88, 428–440, 1998.

  20. Sekiguchi, H., S. Aoi, R. Honda, N. Morikawa, T. Kunugi, and H. Fujiwara, Rupture process of the 2005 West Off Fukuoka Prefecture earthquake obtained from strong motion data of K-NET and KiK-net, Earth Planets Space, 58, this issue, 37–43, 2006.

  21. Sekiguchi, H., K. Irikura, and T. Iwata, Fault geometry in the rupture termination of the 1995 Hyogo-ken Nanbu earthquake, Bull. Seism. Soc. Am., 90, 117–133, 2000.

  22. Seno, T., Syntheses of the regional stress fields of the Japanese islands, Island Arc, 8, 66–79, 1999.

  23. Takenaka, H., T. Nakamura, Y. Yamamoto, G. Toyokuni, and H. Kawase, Precise location of the fault plane and the onset of the main rupture of the 2005West Off Fukuoka Prefecture earthquake, Earth Planets Space, 58, this issue, 75–80, 2006.

  24. The Research Group for Active Faults of Japan, Active Faults in Japan: Sheet Maps and Inventories (Revised Edition), 437 pp., University of Tokyo Press, Tokyo, 1991 (in Japanese with English summary).

  25. Wessel, P. and W. H. F. Smith, New, improved version of Generic Mapping Tools released, Eos Trans. Am. Geophys. Union, 79, 579, 1998.

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Correspondence to Kimiyuki Asano.

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Asano, K., Iwata, T. Source process and near-source ground motions of the 2005 West Off Fukuoka Prefecture earthquake. Earth Planet Sp 58, 93–98 (2006) doi:10.1186/BF03351920

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Key words

  • the 2005 West Off Fukuoka Prefecture earthquake
  • source process
  • kinematic waveform inversion
  • strong ground motion simulation