Development of the HTS-SQUID system for measuring ULF band magnetic field changes related with earthquakes

N. Kasai, Y. Fujinawa, H. Iitaka, K. Nomura, Y. Hatsukade, S. Sato, H. Nakano, T. Doi, T. Nemoto, Atsushi Ishiyama

    Research output: Contribution to journalArticle

    3 Citations (Scopus)

    Abstract

    The electromagnetic field change in the ultra low-frequency (ULF) band was observed in order to investigate the precursory phenomena of crystal activity such as earthquakes, volcanic eruptions and landslides. The measurements are conducted to make clear the generation mechanism of the anomalous electromagnetic field occurring before and during these disastrous phenomena. We have constructed a portable system with a HTS-SQUID magnetometer for the observation of the ULF magnetic field. A dewar that kept liquid nitrogen for about three weeks was developed for a long recording period. The performance of the system was tested at Mt Bandai, an active volcano in Fukushima prefecture, Japan. The system worked for 36 hours. Some anomalous magnetic held changes were recorded before and after the volcanic earthquake which occurred during the field test.

    Original languageEnglish
    Pages (from-to)1135-1139
    Number of pages5
    JournalSuperconductor Science and Technology
    Volume14
    Issue number12
    DOIs
    Publication statusPublished - 2001 Dec

    Fingerprint

    extremely low frequencies
    SQUIDs
    Electromagnetic fields
    Frequency bands
    Earthquakes
    electromagnetic fields
    Volcanic Eruptions
    earthquakes
    Magnetic fields
    Dewars
    landslides
    Volcanoes
    field tests
    Landslides
    Magnetometers
    Liquid nitrogen
    magnetic fields
    liquid nitrogen
    volcanoes
    volcanic eruptions

    ASJC Scopus subject areas

    • Physics and Astronomy (miscellaneous)
    • Condensed Matter Physics
    • Electronic, Optical and Magnetic Materials

    Cite this

    Development of the HTS-SQUID system for measuring ULF band magnetic field changes related with earthquakes. / Kasai, N.; Fujinawa, Y.; Iitaka, H.; Nomura, K.; Hatsukade, Y.; Sato, S.; Nakano, H.; Doi, T.; Nemoto, T.; Ishiyama, Atsushi.

    In: Superconductor Science and Technology, Vol. 14, No. 12, 12.2001, p. 1135-1139.

    Research output: Contribution to journalArticle

    Kasai, N, Fujinawa, Y, Iitaka, H, Nomura, K, Hatsukade, Y, Sato, S, Nakano, H, Doi, T, Nemoto, T & Ishiyama, A 2001, 'Development of the HTS-SQUID system for measuring ULF band magnetic field changes related with earthquakes', Superconductor Science and Technology, vol. 14, no. 12, pp. 1135-1139. https://doi.org/10.1088/0953-2048/14/12/333
    Kasai, N. ; Fujinawa, Y. ; Iitaka, H. ; Nomura, K. ; Hatsukade, Y. ; Sato, S. ; Nakano, H. ; Doi, T. ; Nemoto, T. ; Ishiyama, Atsushi. / Development of the HTS-SQUID system for measuring ULF band magnetic field changes related with earthquakes. In: Superconductor Science and Technology. 2001 ; Vol. 14, No. 12. pp. 1135-1139.
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    AU - Fujinawa, Y.

    AU - Iitaka, H.

    AU - Nomura, K.

    AU - Hatsukade, Y.

    AU - Sato, S.

    AU - Nakano, H.

    AU - Doi, T.

    AU - Nemoto, T.

    AU - Ishiyama, Atsushi

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