The velocity field of the Italian area

The rapid development of several permanent
GNSS networks in Italy has made available a huge amount
of GNSS observations, giving the chance to figure out and
significantly improve the spatial and temporal resolutions
of the crustal deformation in the Italian area. More than 20
GNSS networks, promoted and managed by different institutions,
constitute the grid of monitoring stations that includes
over 1000 permanent stations, mainlydevoted to real-time
positioning services but that has proven to be suitable for
monitoring slow deforming processes, such as for instance,
intraplate deformation processes. The whole set of raw GPS
data is routinely processed at INGV providing daily solutions
of station coordinates and estimating linear velocities
for each station. The information content of coordinate time
series is wide, the station position variations incorporate
linear and non-linear effects caused by geophysical phenomena
of different nature, of which we show some evidences.
The sectors where the permanent network is augmented with
non-permanent sites allows to study tectonic processes with
a finer resolution.

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