Publication Date:
2021-01-05
Description:
We present 4 years of continuous seafloor deformation measurements carried out in the
Campi Flegrei caldera (Southern Italy), one of the most hazardous and populated volcanic
areas in the world. The seafloor sector of the caldera has been monitored since early 2016
by the MEDUSA marine research infrastructure, consisting of four instrumented buoys
installed where sea depth is less than 100 m. Each MEDUSA buoy is equipped with a
cabled, seafloor module with geophysical and oceanographic sensors and a subaerial
GPS station providing seafloor deformation and other environmental measures. Since April
2016, the GPS vertical displacements at the four buoys show a continuous uplift of the
seafloor with cumulative measured uplift ranging between 8 and 20 cm. Despite the data
being affected by environmental noise associated with sea and meteorological conditions,
the horizontal GPS displacements on the buoys show a trend coherent with a radial
deformation pattern. We use jointly the GPS horizontal and vertical velocities of seafloor
and on-land deformations for modeling the volcanic source, finding that a spherical source
fits best the GPS data. The geodetic data produced by MEDUSA has now been integrated
with the data flow of other monitoring networks deployed on land at Campi Flegrei.
Description:
Published
Description:
615178
Description:
4V. Processi pre-eruttivi
Description:
JCR Journal
Keywords:
Seafloor geodesy, volcanic caldera
;
04.08. Volcanology
;
04.03. Geodesy
;
05.04. Instrumentation and techniques of general interest
Repository Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Type:
article
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