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2006 Fiscal Year Final Research Report Summary

Monitoring of the volcanic fluid system and elucidation of the deep-magma ascent mechanism at Aso volcano

Research Project

Project/Area Number 15204040
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Research Field Solid earth and planetary physics
Research InstitutionThe University of Tokyo

Principal Investigator

KAWAKATSU Hitoshi  The University of Tokyo, Earthquake Research Institute, Professor (60242153)

Co-Investigator(Kenkyū-buntansha) SUDO Yasuaki  Kyoto University, Graduate School of Science, Associate Professor (40025466)
OKURA Takahiro  Kyoto University, Graduate School of Science, Associate Professor (40233077)
KANESHIMA Satoshi  Kyushu University, Graduate School of Sciences, Professor (80202018)
YAMAMOTO Mare  Tohoku University, Graduate School of Science, Associate Professor (30400229)
HASHIMOTO Takeshi  Hokkaido University, Graduate School of Science, Associate Professor (70283588)
Project Period (FY) 2003 – 2006
KeywordsAso volcano / broadband seismometer / volcanic tremor / lone-period tremor / volcanic eruption / magma ascent / GPS / array seismometry
Research Abstract

In order to monitor the volcanic fluid system and to elucidate the mechanism of magma ascent before eruptions, we deployed broadband seismometer and GPS networks in Aso volcano. We also conducted a series of dense array observations to monitor shallow fluid flow activities. As the result, (l) we were successful to observe extremely fast fluid movements in the shallow part of the volcano that appear to indicate a well developed shallow conduit system, (2) we have presented a model that explains the activities of long-period (15s) and short-period (1s) tremors as a result of the activities of a single conduit system of hydrothermal fluid flows. We have also developed an efficient method to compute the dynamic response of a fluid-filled crack that is flexible to many applications which may be encountered in volcano seismology.

  • Research Products

    (13 results)

All 2007 2006 2005 2004

All Journal Article (12 results) Book (1 results)

  • [Journal Article] Volcano Seismology2007

    • Author(s)
      H.Kawakatsu and M.Yamamoto
    • Journal Title

      Treatise on Geophysics(Elsevier) 4

      Pages: 389-420

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Yamamoto, Volcano Seismology2007

    • Author(s)
      H. Kawakatsu and M.
    • Journal Title

      Treatise on Geophysics, Elsevier, vol. 4

      Pages: 289-420

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Apparent migration of tremor sourcessynchronized with the chapes in the tremor amplitude observed at Aso volcano,Japan2006

    • Author(s)
      N.Takagi, 他6名
    • Journal Title

      Journal of Volcanology and Geothermal Research 154

      Pages: 181-200

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Apparent migration of tremor sources synchronized with the changes in the tremor amplitude observed at Aso volcano, Japan2006

    • Author(s)
      N. Takagi, et. al.
    • Journal Title

      J. Vol. Geothermal Res 154

      Pages: 181-200

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Dynamic response of frequent tremors at Aso volcano to teleseismic waves from the 1999 Chi-Chi,Taiwan. earthquake2005

    • Author(s)
      M.Miyazawa, 他
    • Journal Title

      J.Volcanology Geothermal Research 147

      Pages: 173-195

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Hydrothermal system beneath Aso volcano as inferred from self-potential mapping and resistivity structure2005

    • Author(s)
      H.Hase, 他
    • Journal Title

      J.Volcanology Geothermal Research 143

      Pages: 259-277

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Numerical simulation of the steam-water flow instability as a mechanism of long period ground vibrations at geothermal areas2005

    • Author(s)
      K.Iwamura and S.Kaneshima
    • Journal Title

      Geophys.J.Int. 162

      Pages: 833-851

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Dynamic response of frequent tremors at Aso volcano to teleseismic waves from the 1999 Chi-Chi, Taiwan earthquake2005

    • Author(s)
      M. Miyazawa, et. al.
    • Journal Title

      J. Vol. GeothermalRes 147

      Pages: 173-195

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Dynamic response of frequent tremors at Aso volcano to teleseismic waves from the 1999 Chi-Chi, Taiwan earthquake2005

    • Author(s)
      H. Hase, et. al.
    • Journal Title

      J. Vol. GeothermalRes 143

      Pages: 259-277

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Kaneshima, Numerical simulation of the steam-water flow instability as a mechanism of long period ground vibrations at geothermal areas2005

    • Author(s)
      K. Iwamura and S.
    • Journal Title

      Geophys. J. Int. 162

      Pages: 833-851

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Distribution and characteristics in waveform and spectrum of seismic events associated with the 2000 eruption of Mt.Usu2004

    • Author(s)
      Matsubara, W.(.他4名), H.Kawakatsu, and M.Yamamoto
    • Journal Title

      J.Vol.Geothermal Res 136

      Pages: 141-158

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Distribution and characteristics in waveform and spectrum of seismic events associated with the 2000 eruption of Mt. Usu2004

    • Author(s)
      W. Matsubara, et. al.
    • Journal Title

      J. Vol. Geothermal Res 136

      Pages: 141-158

    • Description
      「研究成果報告書概要(欧文)」より
  • [Book] 漱石・白秋・清張と阿蘇火山-26人め文学作品にみる火山活動2004

    • Author(s)
      須藤 靖明
    • Total Pages
      144
    • Publisher
      櫂歌書房
    • Description
      「研究成果報告書概要(和文)」より

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Published: 2010-02-04  

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