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Volume 60 Supplement 10

Special Issue: Special Section for the 2007 Noto Hanto Earthquake (2)

Source parameters of the 2007 Noto Hanto earthquake sequence derived from strong motion records at temporary and permanent stations

Earth, Planets and Space volume 60, pages 1011–1016 (2008)Cite this article

Abstract

A large crustal earthquake, the 2007 Noto Hanto earthquake, occurred west off the Noto peninsula in Ishikawa prefecture, Japan, on March 25, 2007. We started temporary strong motion observation at five sites within the aftershock area from about 13 h after the main shock occurrence. We first applied the spectral inversion method to S-wave strong ground motion records at the temporary and permanent stations. We obtained source specta of the main shock and aftershocks, Q s (quality factor for S-wave) values (Q s = 34.5 f0.95) and site responses at 22 sites. We then estimated a source model of the main shock using the empirical Green’s function method. The source model consists of three strong motion generation areas and well explains the observed records. Finally, we examined the consistency of the main-shock source models estimated from the above two analyses. The high-frequency level of the acceleration source spectrum based on the main-shock source model is consistent with the source spectrum estimated from the spectral inversion. The combined area of strong motion generation areas is approximately half of the value expected by the empirical relationship, and the high-frequency level of acceleration source spectrum is approximately 2.5 times larger than the empirical relationship for shallow inland and inter-plate earthquakes.

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Authors and Affiliations

  1. Institute of Seismology and Volcanology, Graduate School of Science, Hokkaido University, N10W8 Kita-ku, Sapporo, 060-0810, Japan

    Takahiro Maeda, Masayoshi Ichiyanagi, Hiroaki Takahashi, Ryo Honda, Teruhiro Yamaguchi & Minoru Kasahara

  2. Graduate School of Engineering, Hokkaido University, N13W8 Kita-ku, Sapporo, 060-8628, Japan

    Tsutomu Sasatani

Authors
  1. Takahiro Maeda
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  2. Masayoshi Ichiyanagi
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  3. Hiroaki Takahashi
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  4. Ryo Honda
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  5. Teruhiro Yamaguchi
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  6. Minoru Kasahara
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  7. Tsutomu Sasatani
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Correspondence to Takahiro Maeda.

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Maeda, T., Ichiyanagi, M., Takahashi, H. et al. Source parameters of the 2007 Noto Hanto earthquake sequence derived from strong motion records at temporary and permanent stations. Earth Planet Sp 60, 1011–1016 (2008). https://doi.org/10.1186/BF03352861

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  • DOI: https://doi.org/10.1186/BF03352861

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