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Earth, Planets and Space

, Volume 58, Issue 1, pp 63–67 | Cite as

Spatial distribution of F-net moment tensors for the 2005 West Off Fukuoka Prefecture Earthquake determined by the extended method of the NIED F-net routine

  • Takumi MatsumotoEmail author
  • Yoshihiro Ito
  • Hirotoshi Matsubayashi
  • Shoji Sekiguchi
Open Access
Letter

Abstract

The 2005 West Off Fukuoka Prefecture Earthquake with a Japan Meteorological Agency (JMA) magnitude (MJMA) of 7.0 occurred on March 20, 2005. We determined moment tensor solutions, using a surface wave with an extended method of the NIED F-net routine processing. The horizontal distance to the station is rounded to the nearest interval of 1 km, and the variance reduction approach is applied to a focal depth from 2 km with an interval of 1 km. We obtain the moment tensors of 101 events with (MJMA) exceeding 3.0 and spatial distribution of these moment tensors. The focal mechanism of aftershocks is mainly of the strike-slip type. The alignment of the epicenters in the rupture zone of the main-shock is oriented between N110°E and N130°E, which is close to the strike of the main-shock’s moment tensor solutions (N122°E). These moment tensor solutions of intermediatesized aftershocks around the focal region represent basic and important information concerning earthquakes in investigating regional tectonic stress fields, source mechanisms and so on.

Key words

The 2005 West Off Fukuoka Prefecture Earthquake moment tensor broadband seismometer seismicity F-net 

References

  1. Fukao, Y., Upper mantle P structure on the ocean side of the Japan-Kurile Arc, Geophys. J. Roy. Astr. Soc., 50, 621–642, 1977.CrossRefGoogle Scholar
  2. Fukuyama, E. and D. S. Dreger, Performance test of an automated moment tensor determination system for the future “Tokai” earthquake, Earth Planets Space, 52, 383–392, 2000.CrossRefGoogle Scholar
  3. 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
  4. Harvard Quick CMTs, http://www.seismology.harvard.edu/projects/CMT/projects/CMT, Harvard University, 2005.
  5. Honda, R., S. Aoi, N. Morikawa, H. Sekiguchi, T. Kunugi, and H. Fujiwara, Ground motion and rupture process of the 2003 Tokachi-oki earthquake obtained from strong motion data of K-NET and KiK-net, Earth Planets Space, 56, 317–322, 2004.CrossRefGoogle Scholar
  6. Imanishi, K., Y. Kuwahara, and Y. Haryu, Off-fault aftershocks of the 2005 West Off Fukuoka Prefecture Earthquake: Reactivation of a structural boundary?, Earth Planets Space, 58, this issue, 81–86, 2006.CrossRefGoogle Scholar
  7. Ito, Y., K. Obara, T. Takeda, K. Shiomi, T. Matsumoto, S. Sekiguchi, and S. Hori, Initial-rupture fault, main-shock fault, and aftershock faults: Fault geometry and bends inferred from centroid moment tensor inversion of the 2005 west off Fukuoka prefecture earthquake, Earth Planets Space, 58, this issue, 69–74, 2006.CrossRefGoogle Scholar
  8. Japan Meteorological Agency, The seismological and volcanological Bulletin of Japan, Japan Meteorological Agency, Tokyo, 2005.Google Scholar
  9. Kagan, Y. Y., 3-D rotation of double-couple earthquake sources, Geophys. J. Int., 106, 709–716, 1991.CrossRefGoogle Scholar
  10. Kennett, B. L. N. and E. R. Engdahl, Travel times for global earthquake location and phase identification, Geophys. J. Int., 122, 429–465, 1991.CrossRefGoogle Scholar
  11. Kubo, A., E. Fukuyama, H. Kawai, and K. Nonomura, NIED seismic moment tensor catalogue for regional earthquakes around Japan: quality test and application, Tectonophysics, 356, 23–48, 2002.CrossRefGoogle Scholar
  12. Matsumoto, T., Y. Ito, and H. Matsubayashi, Spatial distribution of F-net Moment Tensor Solutions of the Mid Niigata Prefecture Earthquake in 2004, J. Seismol. Soc. Japan (Zisin), xx, xx–xx, 2006 (in Japanese with English abstract, in press).Google Scholar
  13. Nishimura, T., S. Fujiwara, M. Murakami, H. Suito, M. Tobita, and H. Yarai, Fault model of the 2005 Fukuoka-ken Seiho-oki earthquake estimated from coseismic deformation observed by GPS and InSAR, Earth Planets Space, 58, this issue, 51–56, 2006.CrossRefGoogle Scholar
  14. 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.CrossRefGoogle Scholar
  15. Saikia, C. K., Modified frequency-wavenumber algorithm for regional seismograms using Filon’s quadrature: modeling of Lg waves in eastern North America, Geophys. J. Int., 118, 142–158, 1994.CrossRefGoogle Scholar
  16. Seismic Activity in Japan—Regional perspectives on the characteristics of destructive earthquakes, http://www.hp1039.jishin.go.jp/eqchreng/eqchrfrm.htm, The Headquarters for Earthquake Research Promotion, 1997.
  17. 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.CrossRefGoogle Scholar
  18. Seno, T., Syntheses of the regional stress fields of the Japanese Islands, The Island Arc, 8, 66–79, 1999.CrossRefGoogle Scholar
  19. Ukawa, M., M. Ishida, S. Matsumura, and K. Kasahara, Hypocenter determination method of the Kanto-Tokai observational network for microearthquakes, Rep. Nat’l Res. Inst. Earth Sci. Disas. Prev., 53, 1–88, 1984 (in Japanese with English abstract).Google Scholar
  20. USGS Fast Moment Tensor Solutions, http://neic.usgs.gov/neis/FM/, USGS, 2005.
  21. Wessel, P. and W. H. F. Smith, New improved version of the Generic Mapping Tools Released, Eos Trans. Am. Geophys. Union, 79, 579, 1998.CrossRefGoogle Scholar

Copyright information

© The Society of Geomagnetism and Earth, Planetary and Space Sciences (SGEPSS); The Seismological Society of Japan; The Volcanological Society of Japan; The Geodetic Society of Japan; The Japanese Society for Planetary Sciences. 2006

Authors and Affiliations

  • Takumi Matsumoto
    • 1
    Email author
  • Yoshihiro Ito
    • 1
  • Hirotoshi Matsubayashi
    • 1
  • Shoji Sekiguchi
    • 1
  1. 1.National Research Institute for Earth Science and Disaster PreventionTsukuba, IbarakiJapan

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