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| Titel |
Geomorphological and geochemical characterization of the 11 August 2008 mud volcano eruption at S. Barbara village (Sicily, Italy) and its possible relationship with seismic activity |
| VerfasserIn |
P. Madonia, F. Grassa, M. Cangemi, C. Musumeci |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1561-8633
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| Digitales Dokument |
URL |
| Erschienen |
In: Natural Hazards and Earth System Science ; 11, no. 5 ; Nr. 11, no. 5 (2011-05-24), S.1545-1557 |
| Datensatznummer |
250009430
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| Publikation (Nr.) |
 copernicus.org/nhess-11-1545-2011.pdf |
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| Zusammenfassung |
| On 11 August 2008 a paroxysmal eruption occurred at Santa Barbara mud
volcano (MV), located close to Caltanissetta, one of the most densely
populated cities of Sicily (Italy). An associated minor event took place on
August 2009. Both the events caused severe damage to civil infrastructures
located within a range of about 2 km from the eruptive vent.
Geomorphological, geochemical, and seismological investigations were carried
out for framing the events in the appropriate geodynamic context.
Geomorphological surveys recognized, in the immediate surrounding of the
main emission point, two different families of processes and landforms: (i)
ground deformations and (ii) changes in morphology and number of the fluid
emitting vents. These processes were associated to a wider network of
fractures, seemingly generated by the shock wave produced by the gas blast
that occurred at the main paroxysm. Geochemical characterization allowed an
estimation of the source of the fluids, or at least their last standing, at about
3 km depth. Finally, the close time relationships observed between anomalous
increments of seismic activity and the two main paroxysmal events accounted
for a possible common trigger for both the phenomena, even with
different timing due to the very different initial conditions and
characteristics of the two processes, i.e. seismogenesis and gas
overloading. |
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