The breach in the f flank did not originate at once, but in several phases. At the time the though liquid lava looked for a way to the surface, she found the former entrances janned. The canal, through which the lava of the W plug came up and which during aruption erupti phase of 1920 21 still served as way out, was closed now. During the rest period of a few years, the lava han been actually s…
By the paroxismal phenomena on December 18 and 19, 1930 in the W wall of the mountain summit a breach originated with a length of 1350 π. This reached an elevation of 2150 a downwards and near the summit it was about 200 m in width. A big part of the old domes on the summit, including the lavastream of 1922 has disappeared.
Volcanological Office at Jalan Cendana 15-Yogyakarta initially was a Branch office of Volcanology Service.
This is the sixth report on the progress of the project Volcano Monitoring and Research in Indonesia, covering the first quarter of 1987. Background information on the project and the organizational status of the Volcanological Survey of Indonesia (VSI) and the U.S. Geological Survey (USGS) were reported in an earlier report (Casadevall, 1985).
Metoda seismik merupakan metoda yang sangat penting dalam mempelajari gunungapi, khususnya di Seksi Penyelidikan Gunung Merapi (PGM) metoda ini sangat berguna dalam peramalan kegiatan G.Merapi dan dalam mempelajari sifat - sifatnya.
Volcanio gases are the primo mover of the eruptions which drags the magma up towards the earth's surface. And because of their much lower viscosity, volcanic gases are far more fast than the magma they come from to give some informa-tions.
Merapi volcano is one of the most active volcanoes of Indonesia. The activity was dated back to the year 1006, when the volcano erupted violently destroying the Kingdom of Mataram and buried the Borobudur temple.
Pekerjaan perbaikan peralatan survey Geomagnit dilapangan ini dilaksanakan bulan Juni 1986 berdasarkan surat perintah perjalanan dinas SFFD No. 425/2/1986 adalah merupakan kelanjutan dan penyempumaan pekerjaan terakhir sebelumya yang disana sini masih terdapat kekurangan disebabkan keterbatasan waktu pelaksanaan pekerjaan dan biaya.
Berdasarkan berita yang diterima dari Pos Pengamatan G. Merapi di Plawangan yang melaporkan adanya kemungkinan kerusakan pada peralatan geomagnet dari stasion lapangan Jumoyo yang selama beberapa waktu tidak berfungsi.
Sehubungan dengan program kerja Seksi Vulkano Fisika, Sub Direktorat Analisa Gunungapi, Direktorat Vulkanologi pada Pelita IV tahun-III 1986-1987, pada tanggal 30 April 1986 selama 11 hari regu Potensial Diri, Tim Vulkano Fisika, berangkat ke Yogyakarta ( G. Merapi) untuk melakukan pengukuran Potensial Diri pada jalur Gendol - Woro. Tujuan penyelidikan ini untuk memonitor aktifitas Potensial D…