Relazione su invito

Computational experiments for reconciling gravity and height changes in volcanic areas.

Currenti G.
  Giovedì 14/09   09:00 - 11:30   Aula A210   IV - Geofisica e fisica dell'ambiente
Combined measurements and modelling of deformation and gravity changes provide important inferences on source mechanisms of magma emplacement processes, which may occur months to years before the onset of volcanic eruptions. In many volcanoes worldwide, there are evidences that the ratio between gravity and height changes is far beyond what could be predicted by using the popular Mogi model. Computational experiments are here presented to investigate how gravity-height ratios markedly depend on: i) source geometry, controlling the volume expansion of the chamber, ii) magma compressibility, affecting the contraction of the magma resident in the chamber, and iii) rheology of the medium, regulating the mechanical response of the surrounding rocks.