文献一覧: 諏訪彰 (著者)

11 0 0 0 OA 雜報

著者: 諏訪彰
出版者: 公益社団法人東京地学協会
雑誌: 地学雑誌 (ISSN:0022135X)
巻号頁・発行日: vol.64, no.4, pp.169-172, 1955-12-30 (Released:2009-11-12)

2013-08-19 02:29:14
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1 0 0 0 OA 1950~1年三原山噴火の活動状況と研究陣展望

著者: 諏訪彰
出版者: Tokyo Geographical Society
雑誌: 地学雑誌 (ISSN:0022135X)
巻号頁・発行日: vol.60, no.3, pp.107-114, 1951-09-30 (Released:2009-11-12)

The writer intended here to sketch in broad outline the eruption of Mt. Miharayama, on the island of Oshima, and to have a general view of the works of Japanese volcanologists with reference to the eruption.The eruption was one of·the greatest activities of the volcano in the historical time, characterized by frequent explosions of the Strombolian type.A summit eruption took place suddenly on July 16, 1950, ejecting ash and lava fragments and welling out molten lava, and continued without interruption until September 23. Besides, the volcanic activity resumed on February 4, 1951, and continued incessantly until about the end of March, but it declined and became intermittent at the beginning of April and was completely dead on July 28.During the eruption, a large quantity of new lava flowed out over the rim of the central cone after an interval of 172 years.Nearly one hundred able volcanologists In our country made various invaluable studies on the eruption from geophysical, geochemical, geological and petrological viewpoints.Moreover, the eruption went a long way toward the popularization of scientific knowledge on the volcano and its activity.

2023-02-19 10:20:08
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1 0 0 0 OA III. 秋田駒ケ岳の噴火活動史

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

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.