著者

諏訪 彰

出版者

特定非営利活動法人日本火山学会

雑誌

火山. 第2集 (ISSN:04534360)

巻号頁・発行日

vol.16, no.2, pp.103-106, 1971-12-01

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A mixed eruption took place at Medake, biggest central cone of the composite volcano Akita-Komagatake, in 1970-71. This is the first magmatic eruption of the volcano in the historical age. All the former eruptions on record were phreatic explosions. The new lava is andesite, though older lavas of the central cones are basalts.