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  1. 131 地震研究所
  2. 東京大学地震研究所彙報
  3. 76
  4. 2
  1. 0 資料タイプ別
  2. 30 紀要・部局刊行物
  3. 東京大学地震研究所彙報
  4. 76
  5. 2

有珠山2000年噴火の推移

https://doi.org/10.15083/0000032616
https://doi.org/10.15083/0000032616
6dd23509-eb2f-4cac-9b7e-b6bd424dffc2
名前 / ファイル ライセンス アクション
ji0762003.pdf ji0762003.pdf (1.7 MB)
Item type 紀要論文 / Departmental Bulletin Paper(1)
公開日 2008-05-30
タイトル
タイトル 有珠山2000年噴火の推移
言語 ja
言語
言語 jpn
キーワード
主題Scheme Other
主題 Usu volcano
キーワード
主題Scheme Other
主題 contribution of groundwater
キーワード
主題Scheme Other
主題 cook's tail-jet eruption
キーワード
主題Scheme Other
主題 phreatic eruption
キーワード
主題Scheme Other
主題 mode of eruption
資源タイプ
資源 http://purl.org/coar/resource_type/c_6501
タイプ departmental bulletin paper
ID登録
ID登録 10.15083/0000032616
ID登録タイプ JaLC
その他のタイトル
その他のタイトル Sequence of the 2000 eruption at Usu volcano, Japan
著者 中田, 節也

× 中田, 節也

WEKO 126283

中田, 節也

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著者別名
識別子Scheme WEKO
識別子 126284
姓名 Nakada, Setsuya
著者所属
著者所属 東京大学地震研究所火山噴火予知研究推進センター
抄録
内容記述タイプ Abstract
内容記述 The eruption started on the northwestern flank of Usu volcano on 31 March 2000, following strong seismicity and inflation of the summit area. The initial vigorous phreatomagmatic eruption moved gradually into phreatic eruption with vertical cock's tail jets in early April. The phreatic eruption was replaced by intermittent small explosion in mid-April, and, furthermore, by continuous steaming that often included ash emissions. Although many craters had been formed by late-April, the eruptive activity became concentrated on a few craters, which enlarged with time. As the eruption proceeded, craters became dry and the amount of issued steam decreased with time. Uplifting of the crater area had been evident since 3 April, and the rate of uplifting decreased exponentially with time. The amplitude of volcanic tremors changed, reflecting the variation of eruption types; small during vertical jet eruption and large during small explosions. The mode of eruption this time was similar in many ways to that of the 1910 eruption, when cryptodomes were formed in the northern slope over several months of sustained phreatic eruptions. The temporal change of eruption type probably reflected a decrease in water within the vents and rising explosion levels in the vent. This may have resulted from the successive production of slurry (clay and ash) there and, in addition, from the effective cooling of the magma head by groundwater (beneath the crater area). The volume of magma related to this eruption (about 0.1 km3) was similar to those of the previous two eruptions (1943-44 and 1977-78), though the mode and the duration of eruption were very different. The different environment of the magma's path, such as the abundance of groundwater, may be the reason.
書誌情報 東京大學地震研究所彙報 = Bulletin of the Earthquake Research Institute, University of Tokyo

巻 76, 号 2, p. 203-214, 発行日 2001-09-25
ISSN
収録物識別子タイプ ISSN
収録物識別子 00408972
書誌レコードID
収録物識別子タイプ NCID
収録物識別子 AN00162258
フォーマット
内容記述タイプ Other
内容記述 application/pdf
日本十進分類法
主題Scheme NDC
主題 453
出版者
出版者 東京大学地震研究所
出版者別名
Earthquake Research Institute, University of Tokyo
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