Fig. 6From: Influence of hydrothermal recharge on the evolution of eruption styles and hazards during the 2018–2019 activity at Kuchinoerabujima Volcano, JapanRepresentative images of classified ash particles as backscattered electron images and optical digital microscope images. Arrows in a, b and d indicate the particles classified in each category. Sulfate, alunite and simple sulfate minerals such as anhydrite and gypsum; py pyrite, pl plagioclaseBack to article page