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Feasibility study on the potential of satellite altimetry for detecting seismic geoid changes due to the 2004 Sumatra-Andaman earthquake

Earth, Planets and Space volume 59, pages 1149–1153 (2007)Cite this article

Abstract

Sea surface height data obtained by satellite altimetry from Jason-1 and TOPEX/Poseidon were analyzed to explore the possibility of a seismic geoid change due to the 2004 Sumatra-Andaman earthquake. This analysis identified a weakly positive geoid change in a region between the trench and outer arc. A subsequent investigation of the characteristics of this coseismic geoid change based on the dislocation theory revealed that a positive peak should indicate the upper edge of the high-slipped area or asperity and that a negative peak is responsible for the lower edge of the earthquake fault. An attempt at modeling the difference in the sea level anomaly failed to explain the observation since a large scatter in the original dataset obstructed its confirmation.

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Authors and Affiliations

  1. Seismology and Volcanology Research Department, Meteorological Research Institute, Nagamine 1-1, Tsukuba, 305-0052, Japan

    Yutaka Hayashi, Kenji Hirata & Hiromi Takayama

  2. Global Environment and Marine Department, Japan Meteorological Agency, Otemachi 1-3-4, Chiyoda-ku, Tokyo, 100-8122, Japan

    Tsurane Kuragano

  3. Office of Planning, Meteorological Research Institute, Nagamine 1-1, Tsukuba, 305-0052, Japan

    Toshiyuki Sakurai

  4. Seismological and Volcanological Department, Japan Meteorological Agency, Otemachi 1-3-4, Chiyoda-ku, Tokyo, 100-8122, Japan

    Yohei Hasegawa & Nobuo Hamada

Authors
  1. Yutaka Hayashi
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  2. Kenji Hirata
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  3. Tsurane Kuragano
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  4. Toshiyuki Sakurai
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  5. Hiromi Takayama
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  6. Yohei Hasegawa
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  7. Nobuo Hamada
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Correspondence to Yutaka Hayashi.

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Hayashi, Y., Hirata, K., Kuragano, T. et al. Feasibility study on the potential of satellite altimetry for detecting seismic geoid changes due to the 2004 Sumatra-Andaman earthquake. Earth Planet Sp 59, 1149–1153 (2007). https://doi.org/10.1186/BF03352062

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  • DOI: https://doi.org/10.1186/BF03352062

Key words

  • Asperity
  • coseismic geoid change
  • Jason-1
  • satellite altimetry
  • sea surface height
  • TOPEX/Poseidon
  • 2004 Sumatra-Andaman earthquake