http://www.cnr.it/ontology/cnr/individuo/prodotto/ID202057
Insights into the dynamics of Mt Etna volcano from gravity and DInSar observations (Abstract/Poster in atti di convegno)
- Type
- Label
- Insights into the dynamics of Mt Etna volcano from gravity and DInSar observations (Abstract/Poster in atti di convegno) (literal)
- Anno
- 2012-01-01T00:00:00+01:00 (literal)
- Alternative label
C. Del Negro (1), E. Sansosti (2), F. Greco (1), A. Pepe (2), G. Currenti (1), G. Solaro (2), R. Napoli (1), S. Pepe
(2), and A. Pistorio (1) (2012)
Insights into the dynamics of Mt Etna volcano from gravity and DInSar observations
in EGU General Assembly 2012, Vienna
(literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- C. Del Negro (1), E. Sansosti (2), F. Greco (1), A. Pepe (2), G. Currenti (1), G. Solaro (2), R. Napoli (1), S. Pepe
(2), and A. Pistorio (1) (literal)
- Note
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
- (1) Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione di Catania, Osservatorio Etneo, Italy, (2) Istituto per il
Rilevamento Elettromagnetico dell'Ambiente, CNR, Napoli, Italy (literal)
- Titolo
- Insights into the dynamics of Mt Etna volcano from gravity and DInSar observations (literal)
- Abstract
- 18-years (September 1994 - October 2011) gravity and ground deformation sequences, recorded at Etna volcano
along an East-West trending profile of 19 stations on the southern flank at a quasi-monthly sampling rate, are presented.
Over the last two decades, frequent fountaining events and several flank eruptions occurred at Mt Etna. We
use the SBAS DInSAR technique to analyze the temporal evolution of surface displacements by inverting a sequence
of interferograms to form a deformation time series. Height changes, evaluated by DInSAR data during the
entire period, show modest vertical variations unable to produce significant gravity changes. However, the gravity
data set was corrected for the small height variations using the experimental free-air gravity gradients measured at
two stations of the profile. The residual space-time gravity image displayed some gravity increase/decrease cycles,
mostly affecting the central and eastern stations of the East-West profile.We attributed these gravity cycles to mass
redistribution processes mainly located at a depth of 2-4 km bsl in a region recognized to be a preferential pathway
of magma rising and an intermediate zone of magma storage/withdrawal. In the latter period 2008-2011, when
several paroxysmal events occurred from the South East crater, the gravity and height deformation patterns show
many similarities with the previous period 1995-2000 encompassing a long series of paroxysmal episodes that
preceded the violent and dramatic explosive/effusive eruptions of 2001 and 2002-2003. (literal)
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