Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/4396
AuthorsBattaglia, M.* 
Gottsmann, J.* 
Carbone, D.* 
Fernández, J.* 
Title4D volcano gravimetry
Issue DateDec-2008
Series/Report no.6/73 (2008)
DOI10.1190/1.2977792
URIhttp://hdl.handle.net/2122/4396
Keywordsgravity changes
volcano
Subject Classification04. Solid Earth::04.01. Earth Interior::04.01.02. Geological and geophysical evidences of deep processes 
04. Solid Earth::04.03. Geodesy::04.03.05. Gravity variations 
04. Solid Earth::04.08. Volcanology::04.08.06. Volcano monitoring 
AbstractTime-dependent gravimetric measurements can detect subsurface processes long before magma flow leads to earthquakes or other eruption precursors. The ability of gravity measurements to detect subsurface mass flow is greatly enhanced if gravity measurements are analyzed and modeled with ground-deformation data. Obtaining the maximum information from microgravity studies requires careful evaluation of the layout of network benchmarks, the gravity environmental signal, and the coupling between gravity changes and crustal deformation. When changes in the system under study are fast (hours to weeks), as in hydrothermal systems and restless volcanoes, continuous gravity observations at selected sites can help to capture many details of the dynamics of the intrusive sources. Despite the instrumental effects, mainly caused by atmospheric temperature, results from monitoring at Mt. Etna volcano show that continuous measurements are a powerful tool for monitoring and studying volcanoes. Several analytical and numerical mathematical models can be used to fit gravity and deformation data. Analytical models offer a closed-form description of the volcanic source. In principle, this allows one to readily infer the relative importance of the source parameters. In active volcanic sites such as Long Valley caldera (California, U.S.A.) and Campi Flegrei (Italy), careful use of analytical models and high-quality data sets has produced good results. However, the simplifications that make analytical models tractable might result in misleading volcanological interpretations, particularly when the real crust surrounding the source is far from the homogeneous/isotropic assumption. Using numerical models allows consideration of more realistic descriptions of the sources and of the crust where they are located (e.g., vertical and lateral mechanical discontinuities, complex source geometries, and topography). Applications at Teide volcano (Tenerife) and Campi Flegrei demonstrate the importance of this more realistic description in gravity calculations.
Appears in Collections:Papers Published / Papers in press

Files in This Item:
File Description SizeFormat 
2008_Battaglia_et_al_Geophysics.pdfMain article989.26 kBAdobe PDFView/Open
Show full item record

Page view(s)

107
Last Week
0
Last month
1
checked on Aug 17, 2017

Download(s)

37
checked on Aug 17, 2017

Google ScholarTM

Check

Altmetric