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Ballistic ejecta and eruption condition of the vulcanian explosion of Shinmoedake volcano, Kyushu, Japan on 1 February, 2011
https://nied-repo.bosai.go.jp/records/5888
https://nied-repo.bosai.go.jp/records/588891b2b841-d962-4c85-9363-7fae59fe9141
| Item type | researchmap(1) | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 公開日 | 2023-05-24 | |||||||||||||
| タイトル | ||||||||||||||
| 言語 | en | |||||||||||||
| タイトル | Ballistic ejecta and eruption condition of the vulcanian explosion of Shinmoedake volcano, Kyushu, Japan on 1 February, 2011 | |||||||||||||
| 言語 | ||||||||||||||
| 言語 | eng | |||||||||||||
| 著者 |
Fukashi Maeno
× Fukashi Maeno
× Setsuya Nakada
× Masashi Nagai
× Tomofumi Kozono
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| 抄録 | ||||||||||||||
| 内容記述タイプ | Other | |||||||||||||
| 内容記述 | The physical condition of the 1 February, 2011, vulcanian explosion at Shinmoedake volcano, Japan, is estimated based on the size of impact craters created by ballistic ejecta, using a ballistic trajectory model and a scaling law for impact crater formation. The initial velocity, impact velocity and mass of ejecta were estimated at 240-290 m/s, 140 +/- 20 m/s and 1-3 ton, respectively. The gas mass fraction at the source was calculated to be 0.04-0.1, using the initial velocity and a theoretical model of vulcanian explosion. This gas mass fraction is higher than the petrologically estimated value for pre-eruptive magma. Low-angle jets from the explosion and the estimated depth and size of a pressurized gas region suggest a shallow source inside the lava dome. The observation and results imply that segregation and accumulation of gas in a shallow conduit played a role in an increase of excess pressure immediately below the dome surface, prior to the vulcanian explosion. | |||||||||||||
| 言語 | en | |||||||||||||
| 書誌情報 |
en : EARTH PLANETS AND SPACE 巻 65, 号 6, p. 609-621, 発行日 2013 |
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| 出版者 | ||||||||||||||
| 言語 | en | |||||||||||||
| 出版者 | TERRA SCIENTIFIC PUBL CO | |||||||||||||
| ISSN | ||||||||||||||
| 収録物識別子タイプ | ISSN | |||||||||||||
| 収録物識別子 | 1343-8832 | |||||||||||||
| DOI | ||||||||||||||
| 関連識別子 | 10.5047/eps.2013.03.004 | |||||||||||||
