2011 Fiscal Year Final Research Report
Elucidation of factors controlling eruption styles by bubble dynamics study
| Project/Area Number |
21200052
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| Research Category |
Grant-in-Aid for Scientific Research on Innovative Areas (Research a proposed research project)
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| Allocation Type | Single-year Grants |
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| Research Field |
Solid earth and planetary physics
Fluid engineering
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| Research Institution | Kyushu University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
ICHIHARA Mie 東京大学, 地震研究所, 助教 (00376625)
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| Project Period (FY) |
2009 – 2011
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| Keywords | 気泡ダイナミクス / 噴火様式 / 間欠泉 / 核沸騰 / 噴出量 / 気泡核形成 / 減圧発泡 |
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| Research Abstract |
We examined the controlling factors of eruption style by laboratory experiments, models and natural observations. In laboratory experiments, it was found that the heterogeneity of superstauration just before an eruption controls the eruption style, or explosivity and mass. Model confirmed the role played by the heterogeneity of supersaturation. We carried out analysis of erupted materials, pumice and bomb, from 2011 Shinmoedake eruptions, and found that the shift of eruption style from Plinian to Vulcanian is related to the heterogeneity in chemical compositions.
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[Journal Article] Monitoring volcanic activity using correlation patterns between infrasound and ground motion2012
Author(s)
Ichihara, M., Takeo, M., Yokoo, A., Oikawa, J., and Ohminato, T.
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Journal Title
Geophys. Res. Lett.
Volume: 2011GL050542, (in press)
Peer Reviewed
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