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Phreatic explosion occurred on 29 December 1982 at Yugama Crater Lake, Kusatsu-Shirane volcano, Japan. The variation of polythionates in the lake water is a good indicator for predicting impending eruption of the volcano. See page 1633. [Masayuki Shimoya, Tsumakoi High School, Gunma, Japan]


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Science. ISSN 0036-8075 (print), 1095-9203 (online)