Publication Date:
2012-02-03
Description:
The GPS time series recorded at the Neapolitan volcanic area reveals a very peculiar
behavior. When a clear deformation is observed, the amplitude distribution evolves from a
super‐Gaussian to a broader distribution. This behavior can be characterized by evaluating
the kurtosis. Spurious periodic components were evidenced by independent component
analysis and then removed by filtering the original signal. The time series for all stations was
modeled with a fifth‐order polynomial fit, which represents the deformation history at
that place. Indeed, when this polynomial is subtracted from the time series, the distributions
again become super‐Gaussian. A simulation of the deformation time evolution was
performed by superposing a Laplacian noise and a synthetic deformation history. The
kurtosis of the obtained signals decreases as the superposition increases, enlightening the
insurgence of the deformation. The presented approach represents a contribution aimed
at adding further information to the studies about the deformation at the Neapolitan volcanic
area by revealing geologically relevant data.
Description:
Published
Description:
B10416
Description:
1.3. TTC - Sorveglianza geodetica delle aree vulcaniche attive
Description:
JCR Journal
Description:
reserved
Keywords:
GPS time series
;
Neapolitan volcanic
;
statistical analysis
;
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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