2006 Mt. Etna eruption imaged by ERS2 and ENVISAT data
Francesco Guglielmino(1), Alessandro Bonaccorso(1), Alessandro Bonforte(1), Mimmo Palano(1) and Giuseppe Puglisi(1)
(1) Istituto Nazionale di Geofisica e Vulcanologia, Piazza Roma, 2, 95123 Catania, Italy
In this work we have analyzed the deformation pattern of Mt. Etna during the pre eruptive and eruptive volcanic activity in 2006, by using ENVISAT and ERS2 data. For this purpose, selected SAR data have been acquired and processed in the frame of the pre-operative test of the EURORISK-PREVIEW project. This data has been provided by ESA through Category 1- project n. 3560.
Mt. Etna volcano in Sicily (Italy) started to erupt during the night of July 14th 2006, when a fissure field formed on the eastern flank of the South East Crater (SEC). Three vents opened along the fissure field at about 3000 m a.s.l., two of them emitting two lava flows (joining into one after few hundred meters) propagating eastwards inside the Valle del Bove (VdB). This eruption lasted a little more than one week, ending on July 23th 2006. The volcanic activity restarted at SEC at the end of August 2006, with strombolian activity and forming new short lava flows expanding eastwards for about 1 km; this activity lasted until mid September. A new eruptive fracture opened on October 13th from the East base of the SEC, trending ESE-WNW and reaching the altitude of 2800 m; here effusive activity started forming lava flows spreading E-wards. The eruption activity ended on December 15th 2006.
The DInSAR data processing was performed in order to measure ground deformation related to the early phase of the eruption. The results of this analysis are validated and discussed with the ground deformations measured by the Mt. Etna GPS network. In particular, the analysis of the SAR data confirms the general trend of inflation that the GPS ground network recorded in the 2005 – 2006 pre-eruptive period; furthermore, the interferometric analysis evidences a new trend, during the summer, which is in agreement with the resumption of volcanic activity observed in the period between September 2006 and October 2006
Keywords: ESA European
Space Agency - Agence spatiale europeenne,
observation de la terre, earth observation,
satellite remote sensing,
teledetection, geophysique, altimetrie, radar,
chimique atmospherique, geophysics, altimetry, radar,