Ultra Vulcanian Eruption

Japanese: ウルトラブルカノ式噴火 - うるとらぶるかのしきふんか
Ultra Vulcanian Eruption

...The so-called Pelee eruption refers to the eruption of small pyroclastic flows as seen at Pelee Volcano in Martinique, West Indies. Surtsey eruptions are shallow submarine eruptions that eject large amounts of fine ash along with other pyroclastic material, while ultravulcanian eruptions are roughly synonymous with phreatic explosions and do not contain rock fragments derived directly from magma. To accurately describe the various aspects of an eruption, it is best to list the elements in parallel, as shown in the table.

*Some of the terms used to describe "Ultravulcanian eruptions" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…またいわゆるプレー式噴火は,西インド諸島マルティニク島のプレー火山で見られた小規模火砕流の噴出を指す。スルツエイ式噴火は浅い海底噴火により大量の細粒火山灰を他の火砕物とともに噴出する様式をいい,ウルトラブルカノ式噴火は水蒸気爆発とほぼ同義で,マグマから直接由来した岩片を含まないものをいう。したがって噴火の種々の様相を正確に記述するには,表に示したような要素を並列して記載するのがよい。…

※「ウルトラブルカノ式噴火」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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