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Volume 56 Supplement 2

Special Issue: Special section for IUGG workshop: Lithospheric Structure of a Supercontinent:Gondwana

Crustal deformation associated with the northern Miyagi earthquake detected by RADARSAT-1 and ENVISAT SAR interferometry

Earth, Planets and Space volume 56, pages 103–107 (2004)Cite this article

Abstract

We applied synthetic aperture radar (SAR) interferometry to map the deformation field of the northern Miyagi earthquake (M6.4) which occurred on July 26, 2003. RADARSAT-1 and ENVISAT satellite data were processed to show the deformation field associated with the earthquake. This is the first observation of the crustal deformation associated with an earthquake detected by ENVISAT SAR interferometry. The 2.5-dimensional displacement near the epicenter was revealed by the combination of RADARSAT-1 and ENVISAT interferograms. The 2.5-D displacement vectors are consistent with the fault model proposed by Nishimura et al. (2003). The InSAR displacement fields show that the boundary of the uplifted and subsided areas is located not along the Asahiyama flexure but 3–4 km east of the flexure. Therefore, the source fault of the earthquake may have little relation to the Asahiyama flexure.

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Authors and Affiliations

  1. Geography and Crustal Dynamics Research Center, Geographical Survey Institute, Kitasato-1, Tsukuba, Ibaraki, 305-0811, Japan

    Hiroshi Yarai, Takuya Nishimura, Mikio Tobita & Tetsuro Imakiire

  2. Japan Society for the Promotion of Science, Geographical Survey Institute, Kitasato-1, Tsukuba, Ibaraki, 305-0811, Japan

    Taku Ozawa

Authors
  1. Hiroshi Yarai
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  2. Taku Ozawa
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  3. Takuya Nishimura
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  4. Mikio Tobita
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  5. Tetsuro Imakiire
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Correspondence to Hiroshi Yarai.

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Yarai, H., Ozawa, T., Nishimura, T. et al. Crustal deformation associated with the northern Miyagi earthquake detected by RADARSAT-1 and ENVISAT SAR interferometry. Earth Planet Sp 56, 103–107 (2004). https://doi.org/10.1186/BF03353394

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  • DOI: https://doi.org/10.1186/BF03353394

Key words

  • Crustal deformation
  • northern Miyagi earthquake
  • InSAR
  • RADARSAT
  • ENVISAT
  • 2.5D displacement