Publication Date:
2021-06-15
Description:
Analyzing the displacement time series from continuous GPS (cGPS) with an Independent
Component Analysis, we detect a transient deformation signal that correlates both in space and time with a
seismic swarm activity (maximum Mw =3.69±0.09) occurred in the hanging wall of the Altotiberina normal
fault (Northern Apennines, Italy) in 2013–2014. The geodetic transient lasted ∼6 months and produced a
NW-SE trending extension of ∼5.3 mm, consistent with the regional tectonic regime. The seismicity and
the geodetic signal are consistent with slip on two splay faults in the Altotiberina fault (ATF) hanging wall.
Comparing the seismic moment associated with the geodetic transient and the seismic events, we observe
that seismicity accounts for only a fraction of the measured geodetic deformation. The combined seismic
and aseismic slip decreased the Coulomb stress on the locked shallow portion of the ATF, while the
transition region to the creeping section has been loaded.
Description:
Published
Description:
7706–7714
Description:
1T. Deformazione crostale attiva
Description:
JCR Journal
Repository Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Type:
article
