Deformation data collected at Mount Etna from 1993 to 1997 show that the inflation of the volcano edifice is accompanied by instability of the eastern flank. We propose a 3D finite element model including topography and lateral variations of elastic constants. Source parameters of the inflating source are constrained by a direct search followed by an appraisal stage of the sampled solutions. The instability of the eastern flank is addressed using a kinematic approach, consisting of a rigid-body translation over a prescribed area. The aim is to evaluate how source parameters are affected by sliding of the eastern flank. When sliding is accounted for, the inferred source location shifts ∼ 1 km SE and its strength decreases by ∼ 20%.
TRASATTI E., CIANETTI S., GIUNCHI C., BONAFEDE M., PIANA AGOSTINETTI N., CASU F., et al. (2009). Bayesian source inference of the 1993-97 deformation at Mount Etna (Italy) by numerical solutions,. GEOPHYSICAL JOURNAL INTERNATIONAL, 177, 806-814 [10.1111/j.1365-246X.2009.04093.x].
Bayesian source inference of the 1993-97 deformation at Mount Etna (Italy) by numerical solutions,
BONAFEDE, MAURIZIO;
2009
Abstract
Deformation data collected at Mount Etna from 1993 to 1997 show that the inflation of the volcano edifice is accompanied by instability of the eastern flank. We propose a 3D finite element model including topography and lateral variations of elastic constants. Source parameters of the inflating source are constrained by a direct search followed by an appraisal stage of the sampled solutions. The instability of the eastern flank is addressed using a kinematic approach, consisting of a rigid-body translation over a prescribed area. The aim is to evaluate how source parameters are affected by sliding of the eastern flank. When sliding is accounted for, the inferred source location shifts ∼ 1 km SE and its strength decreases by ∼ 20%.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
