HR: 1340h
AN: G53B-0891    [Abstracts]
TI: Faulting in the Western Flank and Recharge Processes at Mt.Etna: a Detailed Analysis of Geodetic and Seismic Data
AU: * PatanŠ, D
EM: patane@ct.ingv.it
AF: Istituto Nazionale di Geofisica e Vulcanologia, Piazza Roma 2, Catania, 95100 Italy
AU: Mattia, M
EM: mattia@ct.ingv.it
AF: Istituto Nazionale di Geofisica e Vulcanologia, Piazza Roma 2, Catania, 95100 Italy
AU: Aloisi, M
EM: aloisi@ct.ingv.it
AF: Istituto Nazionale di Geofisica e Vulcanologia, Piazza Roma 2, Catania, 95100 Italy
AU: Amore, M
G53B-0891 AF: Istituto Nazionale di Geofisica e Vulcanologia, Piazza Roma 2, Catania, 95100 Italy
AB: In this study we propose an integrated analysis of geodetic and seismological data in order to characterize the kinematic of faulting in the western flank of Mt. Etna. Here we compute the strain parameters in this sector of the volcano by the inversion of the EDM distances, measured during the period 1980-2004. The presence of a main NE-SW fault, of which only little surface evidence exists, has been here investigated by a careful analysis of the strong seismic swarm occurred on April 20-24, 2001 forerunning the July-August 2001 eruption. Along this tectonic lineament, the observed right lateral rupture mechanisms are incompatible with the ca. N-S regional tectonic stress regime. This behaviour constrained by also geodetic observations over the last 25 years depicts the tectonic response of the medium to major stresses applied by the magma push. In fact, as verified by a Coloumb stress change model analysis, stress perturbations associated with dikes intrusion along the S-SE Rift are sufficient to induce this type of slip along this fault.
DE: 1241 Satellite geodesy: technical issues (6994, 7969)
DE: 1244 Standards and absolute measurements
DE: 8419 Volcano monitoring (7280)
DE: 8488 Volcanic hazards and risks
SC: Geodesy [G]
MN: Fall Meeting 2005