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Evidence of a shallow persistent magmatic reservoir from joint inversion of gravity and ground deformation data: The 25–26 October 2013 Etna lava fountaining event
Author(s)
Language
English
Obiettivo Specifico
2V. Dinamiche di unrest e scenari pre-eruttivi
Status
Published
JCR Journal
JCR Journal
Peer review journal
Yes
Title of the book
Issue/vol(year)
7/43 (2016)
ISSN
0094-8276
Electronic ISSN
1944-8007
Publisher
American Geophysical Union
Pages (printed)
3246–3253
Issued date
March 28, 2016
Abstract
To evaluate the volcanic processes leading to the 25–26 October 2013 lava fountain at Mount
Etna, we jointly investigated gravity, GPS, and DInSARmeasurements covering the late-June to early-November
time interval. We used finite element modeling to infer a shallow magmatic reservoir which (i) inflated
since July 2013, (ii) fed the volcanic activity at the summit craters during 25–26 October, and (iii) deflated
due to magma drainage related to this volcanic activity. We suggested that this reservoir belongs to a
shallow volume, which is located beneath the summit area and is replenished by magma rising from
deep reservoirs and fed the short-term volcanic activity, representing a persistent shallow magmatic
plumbing system of Etna. In addition, the model results show that there is a large discrepancy between the
erupted and shallow reservoir deflation volumes, which could be reasonably attributable to a highly
compressible volatile-rich magma.
Etna, we jointly investigated gravity, GPS, and DInSARmeasurements covering the late-June to early-November
time interval. We used finite element modeling to infer a shallow magmatic reservoir which (i) inflated
since July 2013, (ii) fed the volcanic activity at the summit craters during 25–26 October, and (iii) deflated
due to magma drainage related to this volcanic activity. We suggested that this reservoir belongs to a
shallow volume, which is located beneath the summit area and is replenished by magma rising from
deep reservoirs and fed the short-term volcanic activity, representing a persistent shallow magmatic
plumbing system of Etna. In addition, the model results show that there is a large discrepancy between the
erupted and shallow reservoir deflation volumes, which could be reasonably attributable to a highly
compressible volatile-rich magma.
Type
article
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