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

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  • Ohta Kenji
    Department of Electronics Engineering, Chubu University
  • Watanabe Nobuo
    Department of Electronics Engineering, Chubu University
  • Hayakawa Masashi
    Department of Electronic Engineering, The University of Electro-Communications

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

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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.

Journal

  • Earth, Planets and Space

    Earth, Planets and Space 57 (11), 1103-1108, 2005

    Society of Geomagnetism and Earth, Planetary and Space Sciences, The Seismological Society of Japan, The Volcanological Society of Japan , The Geodetic Society of Japan , The Japanese Society for Planetary Sciences

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