Fig. 6From: Time variations in the chemical and isotopic composition of fumarolic gases at Hakone volcano, Honshu Island, Japan, over the earthquake swarm and eruption in 2015, interpreted by magma sealing modelTriangular diagrams for He–H2S–Ar (a), He–H2–Ar (b) and He–CH4–Ar (c) ternary systemsBack to article page