G.Kelut, + 1731 m, merupakan gunungapi lapis (strato) yang mempunyai danau kawah seluas kira kira 400000 m persegi. Isi airnya lk. 2.5 juta meter kubik. Gelembung-gelembung gas dari solfatar di bawah air menimbulkan kelompok-kelompok bualan di danau kawah tersebut.
the writer visited indonesia from september 21, 1981 until januari 18, 1982, during wihich time he advised the volcanological survey of indonesia (vSI) on the scientific management of the merapi volcano observatory. In addition, he and other merapi team members havemade some volcano-stratigraphic studies at merapi and, briefly, at lawu volcano. The writer made this visit as the first of approxi…