Publication Date:
2024-01-22
Description:
Gravimetric observations were carried out in 2015, to image the uppermost
portion of the volcanic plumbing system of Mt. Etna (Italy). Gravity
measurements were performed using two relative gravimeters, along a profile
that crosses the summit craters area (elevations between 2,820 and 3,280ma.s.l.).
Accurate positioning of the gravity observation points was determined through
GPS measurements. After applying elevation and terrain corrections, the reduced
gravity data were used to build a 2D density model of the uppermost part of the
volcano edifice. This model was constrained using to-date knowledge of the
structural setting of the area and the available volcanological data. We highlighted
the presence of low-density material below the summit craters, down to the depth
of about 2.1 km, interpreted as highly altered, fumarolized and structurally
weakened material. It is also likely that the close presence of the conduits
feeding the summit craters of the volcano contributes to the gravity low in the
SW half of the measurement profile. Conversely, the gravity low observed at the
northern edge of the profile could reflect the high concentration of faults and
eruptive fissures in the Pizzi Deneri area, in correspondence of the Ellittico
caldera rim.
Description:
Published
Description:
1171884
Description:
OSV2: Complessità dei processi vulcanici: approcci multidisciplinari e multiparametrici
Description:
JCR Journal
Repository Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Type:
article
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