In the last days of Augst 1883 on of the world's largest cataclysmic eruptions took place : the volacanic complex of Krakatoa, in Sunda Strait between java and Sumatra was shattered ash as to produce striking atmospheric effects over the whole world for several years to come. To consequent tsunami devastated adjacent coasts.
Pada tanggal 15 -13- 1981, kami ditugaskan oleh Kepala Seksi Pemetaan Topografi untuk melakukan pengukuran topografi terkahir yang ada ukuran Sdr. Samud W. Tahun 1977 di perkirakan sudah banyak perobohannya, setelah antara tahun 1977 sampai dengan tahun 1981 sering terjadi kegiatan.
A program to carry out a series of integrated research activities on Mount Krakatau and the surrounding area has been drawn up and circulated to relevant parties by the Indonesian is planned to span for two years, beginning in Augst 1981.
From the respeots of volcanostratigraphy, geology and petrography, major efforts were payed for field inspection of lavas, pyroclastics and pyroclastio flow deposit and for sampling for petrological and geochemical laboratory works.
Krakatau volcano located in Sunda Strait between Suamtra and Jawa is worldwide known because of the destructive Plinian eruption that took place in 1813. The erupstion effect was felt all over was felt all over the world; seawaves travelled as far as 22,000 km reaching the south american pasific coast and indian coast of africa while volcanic ashes were ejected up to the height of 90 km that tr…
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In 1979 the Indonesian Institute of Sciences (LIPI) and the United Nations Universty (UNU), in particular the Programme on the use and management of natural resource (NRP) signed an agreement to develop jointly as training and research programma on coastal resources management in Indonesia
Pada 4 Juni 1980 dengan SPJ n. 262/P/1980, n.263/P/1980, dan n. 264/P/1980. A.D. Sumpena, sdr.S. Wikartadipura dan saya ditugaskan ke tiga gunungapi di sumatra, diantaranya ke G. Kunyit untuk melakukan pemeriksaan puncak dan pemetaan daerah bahayanya.
Dalam rangka melaksanakan rencana kerja Kegiatan lapangan dari bagian proyek pemetaan daerah bahaya Gunungapi,, Seksi Penanggulangan Bahaya, maka ditugaskan lima orang anggota yang terbagi menjadi dua tim.
Dalam rangka pelaksanaan rencana kerja kegiatan lapangan dari bagian proyek pemetaan daerah bahaya Gunungapi seksi penanggulangan bahaya maka ditugaskan tiga orang anggotanya terdiri dari Sdr. Samud Wikartadipura, Sdr.. A.D. Sumpena dan saya.