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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 | 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 |
Subject Classification: | 04. Solid Earth::04.02. Exploration geophysics::04.02.02. Gravity methods | 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: | Article published / in press |
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File | Description | Size | Format | |
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Pistorio et al 2011 AG.pdf | 821.67 kB | Adobe PDF | View/Open |
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