Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/5947
AuthorsEsposito, A.* 
Anzidei, M.* 
Atzori, S.* 
Devoti, R.* 
Giordano, G.* 
Pietrantonio, G.* 
TitleModeling ground deformations of Panarea volcano hydrothermal/geothermal system (Aeolian Islands, Italy) from GPS data
Issue DateJan-2010
Series/Report no.5/72 (2010)
DOI10.1007/s00445-010-0346-y
URIhttp://hdl.handle.net/2122/5947
KeywordsGPS monitoring
Model
Gas eruption
Active volcanism
Aeolian arc
Subject Classification05. General::05.02. Data dissemination::05.02.03. Volcanic eruptions 
AbstractPanarea volcano (Aeolian Islands, Italy) was considered extinct until November 3, 2002, when a submarine gas eruption began in the area of the islets of Lisca Bianca, Bottaro, Lisca Nera, Dattilo, and Panarelli, about 2.5 km east of Panarea Island. The gas eruption decreased to a state of low degassing by July 2003. Before 2002, the activity of Panarea volcano was characterized by mild degassing of hydrothermal fluid. The compositions of the 2002 gases and their isotopic signatures suggested that the emissions originated from a hydrothermal/geothermal reservoir fed by magmatic fluids. We investigate crustal deformation of Panarea volcano using the global positioning system (GPS) velocity field obtained by the combination of continuous and episodic site observations of the Panarea GPS network in the time span 1995–2007. We present a combined model of Okada sources, which explains the GPS results acquired in the area from December 2002. The kinematics of Panarea volcano show two distinct active crustal domains characterized by different styles of horizontal deformation, supported also by volcanological and structural evidence. Subsidence on order of several millimeters/year is affecting the entire Panarea volcano, and a shortening of 10−6 year−1 has been estimated in the Islets area. Our model reveals that the degassing intensity and distribution are strongly influenced by geophysical-geochemical changes within the hydrothermal/geothermal system. These variations may be triggered by changes in the regional stress field as suggested by the geophysical and volcanological events which occurred in 2002 in the Southern Tyrrhenian area.
Appears in Collections:Papers Published / Papers in press

Files in This Item:
File Description SizeFormat 
esposito etal_2010.pdf708.44 kBAdobe PDFView/Open    Request a copy
Show full item record

Page view(s)

75
checked on Apr 27, 2017

Download(s)

31
checked on Apr 27, 2017

Google ScholarTM

Check

Altmetric