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Earth, Planets and Space

, Volume 58, Issue 1, pp 51–56 | Cite as

Fault model of the 2005 Fukuoka-ken Seiho-oki earthquake estimated from coseismic deformation observed by GPS and InSAR

  • Takuya NishimuraEmail author
  • Satoshi Fujiwara
  • Makoto Murakami
  • Hisashi Suito
  • Mikio Tobita
  • Hiroshi Yarai
Open Access
Letter

Abstract

On 20 March 2005, the Fukuoka-ken Seiho-oki (the 2005 West off Fukuoka Prefecture) earthquake (MJMA7.0) occurred in northern Kyushu, western Japan. We used coseismic deformation observed by GPS and InSAR to construct a fault model. The uniform slip model of rectangular dislocation in an elastic half-space suggests ∼1.4 m of left-lateral strike slip faulting on a near-vertical fault. The fault strike is 298 degrees and its southeastern edge was strongly constrained by the displacement at a permanent GPS station located on Shikanoshima, which is consistent with the aftershock distribution. We estimated slip distribution on a planar fault and found the maximum slip of ∼1.9 m near the surface. Large slip is concentrated at depths of 0 to 10 km in an along-strike range from the hypocenter to 10 km east-southeast of it.

Key words

2005 Fukuoka-ken Seiho-oki (West off Fukuoka Prefecture) earthquake crustal deformation GPS InSAR slip distribution 

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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

  • Takuya Nishimura
    • 1
    Email author
  • Satoshi Fujiwara
    • 1
  • Makoto Murakami
    • 1
  • Hisashi Suito
    • 1
  • Mikio Tobita
    • 1
  • Hiroshi Yarai
    • 1
  1. 1.Geographical Survey InstituteJapan

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