Geodynamics
Geodynamics is the study of the natural events to which our planet is subjected. These demonstrations are translated various manners, which brings us to distinguer :
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geodynamics interns : they are the forces induced by the slow movements convectifs of the coat, and consecutive displacements of the Earth's crust. The constraints imposed on the Lithosphère can generate sudden phenomena, such as the volcanic eruptions and the Séisme S. But, on a geological time scale, internal geodynamics is responsible for the Surrection mountains, or conversely for the digging of broad ditches (grabens) like large the African Rift.
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external geodynamics : in fact the physical demonstrations of order weather, or are dependant there. Thus one will include the erosion and the movements of ground like resultant of the mechanical action, to see chemical, of water (in all its forms), of the wind, the temperature… All these components, dependant on the solar energy, can give, when they are combined, of the phenomena of low amplitude (a drizzle, a breeze) without major effect, or of the phenomena of great width like Crue S or Cyclone S, elements of risks for the human society.
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