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,…
Les hommes ont longtemps cru que les volcans etaient des montagnes qui brulent en emettant de grandes flammes et de la fumee. Les flammes son ten fait des fontaines de lave en fusion ou la reflexion de celles ci sur des pansches volcaniques.
Caldera forming eruption is on of the important phenomena that caused direct huge damage of global impact not only for a short time but moreover for long periods. There have been three big caldera forming eruption in Indonesia within a period of 1000 years BP that affected global climate change, such as Rinjani (1257 AD), Tambora (1815 AD) and Krakatau (1883 AD).
Des Seecles durran, I'homme n'a pu que constater les degats materiels et les victimes provoques par les eruptions. Ii n'a pas trouve de metdhodes simple infailibles pour previor le eruption ou reduire les consequences.