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,…
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.