Setelah mengetahui tentang kedasyatan letusan Krakatau dalam tahun 1883 dan akibat - akibat yang ditimbulkannya secara agak mendetil, sampailah kita sekarang ke sebab - sebab terjadinya letusan gunung berapi itu.
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.
Sesuai rencana kerja proyek pemetaan geologi Gunungapi Sub-Direktorat Pemetaan Gunungapi Direktorat Vulkanologi pada PELITA III geologi gunungapi Krakatau. Pekerjaan lapangan berlangsung 40 hari dari 13 Maret sampai dengan 21 April 1982.
In Anak Krakatau's fifty years of existence an evolutionary developmental growth of its geomorphology and a gradually changing silica-content in the effusive throughout its five decades of eruptive activity could be recognied (De Neve, 1980, 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.
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.
Krakatau's eruptive activity reawakened as sub marine on December 29 1927, and after several brief or longer cyclus of erosion and denudation the volcano finally rose above sea level definetly between Augst 11 and September 10. 1930 as Anak Krakatau IV.
Our earth as a fascinating space ship proves to be ever more so the more we learn about it. We evoloved here, it is our planet and our home, but alas, we only have a very limited direct experience of its past history.
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…
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.