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Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/7457

Authors: Pistorio, A.*
Greco, F.*
Currenti, G.*
Napoli, R.*
Sicali, A.*
Del Negro, C.*
Fortuna, L.*
Title: High-precision gravity measurements using absolute and relative
Title of journal: Annals of Geophysics
Series/Report no.: 5/54 (2011)
Issue Date: Jul-2011
DOI: 10.4401/ag-5348
Keywords: absolute and relative gravimeters
uncertainty
microgravity
Etna volcano
Abstract: Accurate detection of time gravity changes attributable to the dynamics of volcanoes requires high-precision gravity measurements. With the aim of improving the quality of data from the Mount Etna gravity network, we used both absolute and relative gravimeters in a hybrid method. In this report, some of the techniques for gravity surveys are reviewed, and the results related to each method are compared. We show how the total uncertainty estimated for the gravity measurements performed with this combined use of absolute and relative gravimeters is roughly comparable to that calculated when the measurements are acquired using only relative gravimeters (the traditional method). However, the data highlight how the hybrid approach improves the measurement capabilities for surveying the Mount Etna volcanic area. This approach enhances the accuracy of the data, and then of the four-dimensional surveying, which minimizes ambiguities inherent in the gravity measurements. As a case study, we refer to two gravity datasets acquired in 2005 and 2010 from the western part of the Etna volcano, which included five absolute and 13 relative stations of the Etna gravity network.
Appears in Collections:Papers Published / Papers in press
04.02.02. Gravity methods

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