Fig. 9From: Development of a portable assembly-type cosmic-ray muon module for measuring the density structure of a column of magmaThe average density distribution as a projection on the cross-sectional plane that is parallel to the detector plane and which includes the crater floor of Mt. Iwodake. In order to incorporate the errors in density determination into the image, the density anomalies only below 1.96 g cm−3 are mapped.Back to article page