Fig. 1From: Aeromagnetic survey in Kusatsu-Shirane volcano, central Japan, by using an unmanned helicopterSurvey area map in Kusatsu-Shirane volcano: the flight course projected onto the plane map is color-contoured in the geomagnetic total intensity measured by the helicopter. The closed circle, square, and triangle indicate the locations of the crater lake Yugama of Mt. Shirane, Kagamiike-kita crater, and the main crater of Mt. Motoshirane, respectively. The star in the small map indicates the location of Kusatsu-Shirane volcano in JapanBack to article page