Skip to main content
Fig. 11 | Earth, Planets and Space

Fig. 11

From: Behavior of magmatic components in fumarolic gases related to the 2018 phreatic eruption at Ebinokogen Ioyama volcano, Kirishima Volcanic Group, Kyushu, Japan

Fig. 11

a Changes in the CH4/He molar ratio of fumarolic gas. b Changes in the SO2/H2S molar ratio of fumarolic gas. The y-axis values of 0.5 and 4 for H2S/SO2 ratio were indicated by the two horizontal broken lines. c Changes in the SO2/CO2 molar ratio of fumarolic gas. Fumarolic gases surrounded by red and yellow circles are classified as being of shallow hydrothermal magmatic (SHM) and deep hydrothermal magmatic (DHM) origins, respectively. Red histogram and vertical lines are the same as in Fig. 3

Back to article page
\