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The observation of ULF emissions at Nakatsugawa in possible association with the 2004 Mid Niigata Prefecture earthquake

Earth, Planets and Space volume 57, pages 1103–1108 (2005)Cite this article

Abstract

The observation of ULF/ELF electromagnetic emissions at Nakatsugawa, Gifu, has indicated that ULF emissions in the frequency below 0.1 Hz take place about two-three weeks before the 2004 Mid Niigata Prefecture earthquakes. The most important support to this is based on the goniometric direction finding for those ULF emissions in the period of October 2–6, which indicates their azimuth being very close to the epicenters of the earthquake. So, these ULF emissions on October 2–6 are likely to be associated with the 2004 Mid Niigata Prefecture earthquake.

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Authors and Affiliations

  1. Department of Electronics Engineering, Chubu University, 1200 Matsumoto-cho, Kasugai, Aichi, 487-8501, Japan

    Kenji Ohta & Nobuo Watanabe

  2. Department of Electronic Engineering, The University of Electro-Communications, 1-5-1 Chofugaoka, Chofu, Tokyo, 182-8585, Japan

    Masashi Hayakawa

Authors
  1. Kenji Ohta
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  2. Nobuo Watanabe
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  3. Masashi Hayakawa
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Corresponding author

Correspondence to Masashi Hayakawa.

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Ohta, K., Watanabe, N. & Hayakawa, M. The observation of ULF emissions at Nakatsugawa in possible association with the 2004 Mid Niigata Prefecture earthquake. Earth Planet Sp 57, 1103–1108 (2005). https://doi.org/10.1186/BF03351889

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  • DOI: https://doi.org/10.1186/BF03351889

Key words

  • Seismogenic ULF emissions
  • 2004 Mid Niigata Prefecture earthquake
  • goniometric direction finding