Fig. 1

Location of Aso Volcano, Kyushu, Japan. The outline of the present caldera rim and distribution of Aso-4 ignimbrite deposits are based on GIS data in Hoshizumi et al. (2023)
Location of Aso Volcano, Kyushu, Japan. The outline of the present caldera rim and distribution of Aso-4 ignimbrite deposits are based on GIS data in Hoshizumi et al. (2023)