2011 Fiscal Year Final Research Report
Tremor equations for geyser eruptions
| Project/Area Number |
21540436
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Solid earth and planetary physics
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| Research Institution | Kyushu University |
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Principal Investigator |
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| Co-Investigator(Renkei-kenkyūsha) |
ICHHARA Me 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 | 火山現象 / 火山性微動 / 間欠泉 / マグマの発泡 / 沸騰現象 |
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| Research Abstract |
We examined the significance of proposed equation" tremor equation" using laboratory geyser experiments. The experiments shows that the pressure oscillation shifts from eruption stage, through active stage, to inactive stage, thereafter an eruption onsets. In the active stage, two types of oscillation can be recognized, that is, fluid system oscillation and cyclic formation of bubbles. It is found that the proposed equation can explain the fluid system oscillation. The equation accounts for the experimental facts ;(1) pressure oscillation shifts from active to inactive stages as boiling becomes active,(2) efficiency of fluid oscillation depends on rates of bubble growth.
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