Skip to main content
Earth, Planets and Space
Fig. 8 | Earth, Planets and Space

Fig. 8

From: Volcanic unrest at Hakone volcano after the 2015 phreatic eruption: reactivation of a ruptured hydrothermal system?

Fig. 8

Sequential change of magmatic components (SO2 and HCl) relative to a hydrothermal component (H2S) within the atmosphere near the 15–2 fumarole, measured by dosi-tubes. Each panel shows values obtained by a set of dosi-tubes exposed to the air (upper panel) and another set within a container filled with silica gel (lower panel). The durations of volcanic unrest episodes are shown as shaded yellow (VAL2 or more) and blue (baseline across the volcano is increasing). See caption of Fig. 3 for details. The spikes in HCl/H2S ratio of the exposed set (HCl/H2S > 2) are considered to be errors caused by color changes due to steam precipitation within the tube

Back to article page