2012 Fiscal Year Final Research Report
Development of monitoring system for phreatic eruptions using electromagnetic induction and magnetic total force
| Project/Area Number |
22310109
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Natural disaster science
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| Research Institution | Tokyo Institute of Technology |
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Principal Investigator |
OGAWA Yasuo 東京工業大学, 火山流体研究センター, 教授 (10334525)
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| Co-Investigator(Kenkyū-buntansha) |
KANDA Wataru 東京工業大学, 火山流体研究センター, 准教授 (00301755)
NOGAMI Kenji 東京工業大学, 火山流体研究センター, 教授 (70251676)
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| Project Period (FY) |
2010 – 2012
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| Keywords | 火山噴火 / 電磁気モニタリング |
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| Research Abstract |
We have developed a monitoring system for phreatic eruption environment (1) with electromagnetic induction method, which images resistivity model and (2) with magnetic total force stations, which detects the temporal changes of temperature at depth. Regarding the electromagnetic induction methods, we developed a coincident loop system, where transmitting and receiving loops with radius of 30m are located at the same location. Regarding the magnetic total forces, our measurements of four stations at Kusatsu-Shirane volcano found decreasing the magnetization of the volcanic edifice, which means that the volcanic body is cooling, although surface thermal areas are expanding at the Yugama crater. We interpret that the volcano is effectively releasing heat from the surface, but the volcano at 500m depth is cooling.
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[Journal Article] Magnetotelluric and temperature monitoring after the 2011 sub-Plinian eruptions of Shinmoe-dake volcano2013
Author(s)
Aizawa, K.,T.Koyama,M.Uyeshima,H.Hase,T.Hashimoto,W.Kanda,R.Yoshimura,M.Utusgi,Y.Ogawa,K.Yamazaki
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Journal Title
Earth Planets Space
Volume: (印刷中)
Peer Reviewed
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[Presentation] 3D imaging clay-cap and underlying gas reservoir by magnetotelluric modeling and micro-earthquake monitoring at Kusatsu-Shirane volcano2013
Author(s)
Y,Ogawa,Nurhasan,S,B,Tank,N.Ujihara,Y,Honkura,& T,Yamawaki
Organizer
Japan,IAVCEI,Kagoshima
Place of Presentation
鹿児島県民交流センター(鹿児島市)
Year and Date
2013-07-21
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[Presentation] Three-dimensional imaging of fluids under the volcanic arc2013
Author(s)
Y,Ogawa,H,Fukino,M,Ichiki,and W.Kanda
Organizer
around Naruko Volcano, NE Japan, 5th International Symposium on Three-Dimensional Electromagnetics,Sapporo, Japan
Place of Presentation
北海道大学(札幌市)
Year and Date
2013-05-09
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[Presentation] Structure of the Tongariro Volcanic System2010
Author(s)
G.J.Hill,T.G.Caldwell,H.M.Bibby,Y.Ogawa,S.L.Bennie,E.A.Bertrand,and H.Keys
Organizer
New Zealand: Preliminary results from a 3-D Magnetotelluric Survey,20th Electromagnetic Induction Workshop
Place of Presentation
Giza(Egypt)
Year and Date
2010-09-24
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