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| Titel |
Semi-automated extraction of Deviation Indexes (DI) from satellite Persistent Scatterers time series: tests on sedimentary volcanism and tectonically-induced motions |
| VerfasserIn |
F. Cigna, D. Tapete, N. Casagli |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1023-5809
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| Digitales Dokument |
URL |
| Erschienen |
In: Nonlinear Processes in Geophysics ; 19, no. 6 ; Nr. 19, no. 6 (2012-11-26), S.643-655 |
| Datensatznummer |
250014263
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| Publikation (Nr.) |
 copernicus.org/npg-19-643-2012.pdf |
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| Zusammenfassung |
| We develop a methodology based on satellite Persistent Scatterers (PS) time
series and aimed to calculate two indexes which are capable to depict the
deviation from a deformation model defined a priori. Through a simple
mathematical approach, these indexes reproduce the visual process of
identification of trend deviations that is usually performed manually by the
radar-interpreter, and guide the prioritization of further interpretation
for those areas recording significant variations within their motion
history. First tests on semi-automated extraction of the Deviation Indexes
(DI) from RADARSAT-1 PS data available over Southern Italy allowed the
quantification of tectonically-induced land motions which occurred in February
2005 within the town of Naro, and also the clear recognition of the
precursors to mud volcano eruptions which occurred in August 2008 in the village
of St. Barbara. For these areas, the information level brought by the DI
increases and adds onto that of other PS parameters, such as yearly
velocity, standard deviation and coherence. Factors exerting influence on
the DI are critically tackled within the discussions, together with the
analysis of the potentials of these indexes for monitoring and warning
activities of geohazards. |
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