Fig. 10

One-dimensional density modeling in the conduit together with the density distribution as obtained from the muon observation. The red line is drawn through the data points to guide the eye. The orange and blue lines correspond to the densities of ascending and descending magma, respectively, when the magma head is located at a place 280 m below the crater floor. The green and purple lines correspond to the densities of ascending and descending magma, respectively, when the magma head is located at a place 150 m below the crater floor.