Bumi dan isinya menunjukkan aktivitas alam membuat manusia mempelajarinya sehingga timbullah ilmu geosains. Geosains merupakan ilmu dasar yang mempelajari bumi dan isinya. Geosains memiliki berbagai cabang ilmu seperti geologi, geofisika, geokimia, dan lain sebagainya.
Sekitar 129 gunungapi tersebar di seluruh pulau di Indonesia, dimana penyebarannya berada disepanjang sabuk gunungapi Indonesia mulai dari kawasan Sumatra, Jawa, Nusa Tenggara dan menerus hingga perairan Maluku dan kawasan Sulawesi Utara.
Indonesia merupakan salah satu negara yang terdiri dari banyak gunungapi, disamping Jepang, New Zealand, Italia, Amerika Serikat, dan Filipina (Munir, M. 1996). Sekitar 129 gunungapi tersebar di seluruh pulau di Indonesia. Dimana penyebarannya berada disepanjang sabuk gunungapi Indonesia mulai dari kawasan Sumatra, Jawa, Nusa Tenggara dan menerus hingga perairan Maluku dan kawasan Sulawesi Utara.
Indonesia merupakan salah satu negara yang memiliki banyak gunungapi, di samping Jepang, New Zealand, Italia, Hawai dan Filipina. Biasanya, gunung dapat diartikan setiap tempat yang lebih tinggi daripada sekelilingnya. Keberadaan gunungapi di permukaan bumi selama ini masih dianggap sebagai ancaman bagi masyarakat sekitar.
The question first considered by Wegener concerning the nature of the processes in the Earth bringing about continental drift and sea-floor spreading (or major displacements of the litosphere) in the last 100-200 myr, is probably the most important one in geoscience at the present time. The concept of plate tectonics has integrated the evidence for continental drift, sea-floor spreading and glo…
Indonesia is formed by the interaction of three large plates producing volcanic paths magmatic pathways and sediment deposits, as well as forming geological diversity and geological heritage that are potential to be developed into geotourism and geopark areas. Whitin a period of 800 years, Indonesia has produced three caldera with a diameter 7km (Rinjani, Tambora and Krakatau).
With the threat of depletion of conventional sources of energy there has been increased interest in harnessing geothermal energy for man’s use in many countries. However, there as comparatively few people with wide experience in the science and technology of developing this new energy resources.
The current energy crisis has generated an increased interest in alternate source of energy. Resources such as geothermal, solar, and ocean thermal are being actively considered for wide-spread development in the United States and many other countries throughout the world.
Geothermics can be defined as the study of the temperature distribution in the earth and the phenomena which influence that distribution. At the earth’s surface and in the atmosphere, complex meteorological events occur which are strongly influenced by temperature. These phenomena will only be mentioned briefly.
The eminent volcanologist T.A. Jaggar in no way exaggerated the significance of volcanic phenomena when je stated that his conception of volcanicity was of a process which is everywhere at work within and beneath the earth’s crust. Today there are more than 500 volcanoes which are still active or at which activity has been recorded during historic times, while the number of extinct volcanoes,…