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Earth, Planets and Space
Fig. 4 | Earth, Planets and Space

Fig. 4

From: Influence of hydrothermal recharge on the evolution of eruption styles and hazards during the 2018–2019 activity at Kuchinoerabujima Volcano, Japan

Fig. 4

Temporal variation of X-ray peak intensities of alteration minerals versus rock-forming minerals. The ratios refer to the total peak intensity of maximum peaks of silica minerals of tridymite, cristobalite, and quartz (silica/Pl); sulfate minerals of gypsum, anhydrite, and alunite (sulfate/Pl); and sulfide mineral of pyrite (sulfide/Pl), divided by the maximum peak intensity of plagioclase (Pl), respectively

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