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Re-estimation of tsunami source of the 1952 Tokachi-oki earthquake

Abstract

Previous studies indicate that the source area of the 2003 Tokachi-oki earthquake (M 8.0) was smaller than the comparable 1952 Tokachi-oki earthquake (M 8.2) source. We reinverted the 1952 tsunami waveforms, by adopting higher-resolution tsunami simulation method, and estimating and correcting for clock errors of tide gauges from comparison of the 1952 and 2003 tsunami waveforms. The estimated slip distribution indicates that the 1952 tsunami source area was indeed larger than the 2003 source. The distributions of measured and computed coastal tsunami heights also support this conclusion.

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Satake, K., Hirata, K., Yamaki, S. et al. Re-estimation of tsunami source of the 1952 Tokachi-oki earthquake. Earth Planet Sp 58, 535–542 (2006). https://doi.org/10.1186/BF03351951

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  • DOI: https://doi.org/10.1186/BF03351951

Key words

  • Tokachi-oki earthquake
  • tsunami
  • tide gauge
  • Kuril trench