Please use this identifier to cite or link to this item:
Authors: Gambino, S.* 
Guglielmino, F.* 
Title: Ground deformation induced by geothermal processes: a model for La Fossa Crater (Vulcano Island, Italy)
Issue Date: Jul-2008
Series/Report no.: /113 (2008)
DOI: 10.1029/2007JB005016
Keywords: modeling
hydrothermal source
Subject Classification04. Solid Earth::04.08. Volcanology::04.08.06. Volcano monitoring 
Abstract: Since the last eruption in 1888-90, volcanic activity at Vulcano Island (Aeolian Archipelago, Italy) has been limited to fumarolic degassing, concentrated near the active cone of “La Fossa” crater in the northern sector of the island. During the period 1990-1996, EDM and levelling data indicate a deflation and contraction focused on the La Fossa Cone. We jointly inverted these datasets using for volume change both a spherical Mogi (1958) source and an ellipsoid as defined by Davis (1986). The best fitting source for the 1990-96 deflation is a shallow sub-vertical prolate ellipsoid positioned roughly under the crater. Our model is consistent with increased activity in a shallow hydrothermal system, supported by observations of water evaporation testified by the increase of steam emission and temperature at crater fumaroles. The fluid loss from a shallow geothermal reservoir is the most likely cause of the subsidence recorded at La Fossa Cone during the same period. This clear linkage between the deformation signals and hydrothermal activity, has important implications in the hazard assessment and monitoring of the Vulcano activity.
Appears in Collections:Papers Published / Papers in press

Files in This Item:
File Description SizeFormat 
Gambino and Guglielmino_2008.pdf446.68 kBAdobe PDFView/Open
Show full item record

Page view(s)

Last Week
Last month
checked on Aug 18, 2018


checked on Aug 18, 2018

Google ScholarTM