Publication Date:
2017-04-04
Description:
Independent component analysis (ICA) is a recent and well-known technique used to separate
mixtures of signals. This technique has been applied to the ground deformation time-series
recorded at the permanent GPS network of the Osservatorio Vesuviano—INGV in order to
characterize the deformation background level in the Neapolitan volcanic area. The analysis
revealed the presence of five independent periodic signals common at all the GPS stations; some
of them are interpreted as effects of earth tides. The residual signal at each station represent
the local ground deformation. Unfortunately the ICA cannot provide the absolute amplitude
of the components, indeed we are not able to obtain a residual amplitude at each station. Then
we used a stationarity analysis in order to investigate the eventual presence of local transient
deformations. The ICA technique combined with the stationarity analysis has shown to be a
very interesting tool for individuating ground deformation trends and could be very useful in
volcanic areas monitoring.
Description:
Published
Description:
1305–1310
Description:
1.3. TTC - Sorveglianza geodetica delle aree vulcaniche attive
Description:
JCR Journal
Description:
reserved
Keywords:
independent component analysis
;
ground deformationin
;
signal processing
;
04. Solid Earth::04.08. Volcanology::04.08.06. Volcano monitoring
;
05. General::05.01. Computational geophysics::05.01.04. Statistical analysis
Repository Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Type:
article
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