| 爺爺火山の1973年南火口。北方、カルデラ縁より望む。比高150 m、基底直径1.3 kmの火砕丘を形成した。火口径は600 m×530 m。1999年撮影。 |
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| View of Minami Crater (pyroclastic cone) formed during the 1973 eruption as seen from the N. Crater diameter: 600 x 530 m; height: 150 m (on the caldera rim), basal diameter of the cone: ca. 1.3 km. | Y. Ishizuka, 1999 |