Fig. 3From: Estimation of total discharged mass from the phreatic eruption of Ontake Volcano, central Japan, on September 27, 2014Total discharged mass estimation using the segment integration method (Takarada et al. 2001). The regression lines are subdivided into eight segments. Each line is used to calculate the ash-fall volume. Estimated volumes of each segment are shown in the lower part of the figureBack to article page