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タイトル: B Brief Note on the Eruption of the Tokachi-dake Volcano of June 29 and 30, 1962
その他のタイトル: 昭和37年6月29,30日の十勝岳火山の噴火について
著者: Murai, Isamu
著者(別言語): 村井, 勇
発行日: 1963年6月30日
出版者: 東京大学地震研究所
掲載誌情報: 東京大学地震研究所彙報. 第41冊第1号, 1963.6.30, pp. 185-208
抄録: The activity of the volcano seems to have increased in intensity since 1952, when the fumarolic activity on the southern slope of the Suribachi crater recurred. In 1962, the fumarolic activity in the Taisho crater increased remarkably, and since late April preliminary earthquakes have occurred frequently in the area around the volcano. The first outburst of June 29, 1962, is considered to have consisted of steam explosion, which ejected rock debris from the southern rim of the Taisho crater. During the period prior to the outburst, the amount of ground water beneath the volcano had increased by the melting of snow due to the warm climate of May and June. This was suggested by the gush of muddy water at the foot of the eastern wall of the Taisho crater, on the southern slope of the Suribachi crater and on the western side of the central cone. It may be possible to consider that such filling of water in the ground might induce the steam explosion. After the first out- bursts of steam, a rapid rising of magma column followed resulting in the second eruption of June 30 and several days following, which consisted of intense discharge of ash and bombs with many accessory and accidental ejecta.
URI: http://hdl.handle.net/2261/12103
ISSN: 00408972


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