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Experiment for detection of volcanic fluid movements by gravity gradiometer

Research Project

Project/Area Number 24651198
Research Category

Grant-in-Aid for Challenging Exploratory Research

Allocation TypeMulti-year Fund
Research Field Natural disaster science
Research InstitutionKyoto University

Principal Investigator

KAGIYAMA Tsuneomi  京都大学, 理学(系)研究科(研究院), 教授 (50126025)

Co-Investigator(Kenkyū-buntansha) SHIOMI Sachie  京都大学, 生存圏研究所, 研究員 (60584266)
Co-Investigator(Renkei-kenkyūsha) KURODA Kazuaki  東京大学, 宇宙線研究所, 教授 (00242165)
Project Period (FY) 2012-04-01 – 2015-03-31
Project Status Completed (Fiscal Year 2014)
Budget Amount *help
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2013: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2012: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Keywords火山 / 重力勾配 / 自然災害 / 火山噴火 / 測地 / 地下水
Outline of Final Research Achievements

Gravity observation is useful for monitoring volcanic activity, because it gives information on material movement. But it also needs the height of the measuring points. The gravity gradiometer measures differential accelerations between two test masses that are in free fall at different heights, and measured values are insensitive to the change of the observation height. Therefore, the gravity gradiometer could be useful for monitoring of volcanic activity. According to the gravity measurements in Aso volcano, the change in gravity exceeds 60 µGal around the crater, and this change indicates hydrothermal mass movement. The prototype gravity gradiometer was applied Aso and Sakurajima volcanoes. Unexplained disturbances were observed in longer term measurements, and after understanding the sources of the disturbances, vertical gravity gradients was succeeded to observe within a few μGal/m error. However, this gradiometer has many difficulties to apply volcanic fields.

Report

(4 results)
  • 2014 Annual Research Report   Final Research Report ( PDF )
  • 2013 Research-status Report
  • 2012 Research-status Report
  • Research Products

    (9 results)

All 2014 2013 2012 Other

All Journal Article (3 results) Presentation (6 results)

  • [Journal Article] Mass variation beneath Aso Volcano, southwest Japan2013

    • Author(s)
      Sofyan, Y, Yoshikawa, S., Fukuda, Y., Kagiyama, T., Ohkura, T., Nishijima, J. and Fujimitsu, Y.
    • Journal Title

      Annual Rep. Inst. Geotherm. Sci. Kyoto Univ.

      Volume: FY2012 Pages: 25-27

    • Related Report
      2013 Research-status Report
  • [Journal Article] Development of laser-interferometric gravity-gradiometer at the Aso Volcanological Laboratory2013

    • Author(s)
      Shiomi, S., Kagiyama, T., Sofyan, Y. and Yoshikawa, S.
    • Journal Title

      Annual Rep. Inst. Geotherm. Sci. Kyoto Univ.

      Volume: FY2012 Pages: 23-24

    • Related Report
      2013 Research-status Report
  • [Journal Article] 阿蘇火山における繰り返し重力測定による熱水流動のモニタリング2012

    • Author(s)
      Yayan Sofyan・吉川慎・鍵山恒臣・大倉敬宏
    • Journal Title

      月刊地球

      Volume: 34 Pages: 691-699

    • Related Report
      2012 Research-status Report
  • [Presentation] 阿蘇火山火口近傍の重力変動と降水の重力寄与2014

    • Author(s)
      早河秀章・鍵山恒臣・大倉敬宏・吉川 慎
    • Organizer
      地球惑星科学連合2014年大会
    • Place of Presentation
      横浜市
    • Year and Date
      2014-04-28 – 2014-05-02
    • Related Report
      2014 Annual Research Report
  • [Presentation] レーザー干渉計型重力勾配計の開発と桜島火山における試運転2014

    • Author(s)
      潮見幸江・鍵山恒臣
    • Organizer
      地球惑星科学連合2014年大会
    • Place of Presentation
      横浜市
    • Year and Date
      2014-04-28 – 2014-05-02
    • Related Report
      2014 Annual Research Report
  • [Presentation] 静穏期における阿蘇火山火口近傍の重力変動2013

    • Author(s)
      早河秀章・鍵山恒臣・大倉敬宏・吉川慎
    • Organizer
      日本測地学会第120回講演会
    • Place of Presentation
      東京都立川市
    • Related Report
      2013 Research-status Report
  • [Presentation] Hydrothermal dynamics beneath Aso volcano, southwest Japan: View from 3D inversion model of 4-D gravity data2012

    • Author(s)
      Yayan Sofyan, Shin Yoshikawa, Tsuneomi Kaagiyama, Takahiro Ohkura
    • Organizer
      American Geophysical Union Fall Meeting 2012
    • Place of Presentation
      Moscone Convention Centerサンフランシスコ(米国)
    • Related Report
      2012 Research-status Report
  • [Presentation] 阿蘇火山実地測定に向けた重力勾配計の開発

    • Author(s)
      潮見幸江・鍵山恒臣・Yayan Sofyan・吉川慎
    • Organizer
      日本測地学会第118回講演会
    • Place of Presentation
      仙台市福祉プラザ(仙台市)
    • Related Report
      2012 Research-status Report
  • [Presentation] レーザー干渉計型重力勾配計の阿蘇火山における適用試験

    • Author(s)
      潮見幸江・黒田和明・鍵山恒臣・Yayan Sofyan・吉川慎
    • Organizer
      地球惑星科学連合2012年大会
    • Place of Presentation
      幕張メッセ(千葉市)
    • Related Report
      2012 Research-status Report

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Published: 2013-05-31   Modified: 2019-07-29  

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