Fig. 13.

Particle size distributions of ash samples. Dates of eruptions are shown without year if they occurred in 2011. No. indicates sampling site (Fig. 1 and Table 1) and “Pro” indicates sampling in proximal area (“3 km from the crater’s center); all other samples are from 5 to 13 km distance. Note smaller average particle sizes in the phreatic stage and the two phreatomagmatic stages than in the other stages.