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Table 1 Maximum temperature of fumarole steam at Owakudani from the historical literature (after Mannen 2009)

From: Chronology of the 2015 eruption of Hakone volcano, Japan: geological background, mechanism of volcanic unrest and disaster mitigation measures during the crisis

Year

Observer

Max. temperature (°C)

1872

J. P. I. Vidal

103

1917

F. Omori

141

1920

T. Kato

106

1921

T. Kato

97

1925

S. Tokuda

98

1932–1933

M. Sugiyama and O. Okada

102

1951–1953

I. Iwasaki

86

1966–1967

K. Yuhara

138 (steam well?)