Publication Date:
2024-01-19
Description:
La Fossa Caldera at Vulcano Island, part of the Aeolian Islands
archipelago in Italy, has shown an increased volcanic activity since September 2021. This activity is
characterized by an increase in fumarole temperatures, massive gas emissions, as well as a marked uplift
of the crater area, accompanied by an increase in seismicity. To investigate the nature of these phenomena,
an analysis of ground deformation data obtained from Multi Temporal Interferometric Synthetic Aperture
Radar and Global Navigation Satellite System measurements is presented. Additionally, a detailed analysis of
data recorded by the seismic network on Vulcano Island has been conducted. The results indicate that these
anomalies can be attributed to the expansion of the hydrothermal system, a phenomenon previously observed in the late 1970s and early 1990s.
Description:
La Fossa Caldera at Vulcano (Italy) has been showing signs of unrest since September 2021.
To investigate this phenomenon, we conducted an analysis of geodetic and seismological data from July
to December 2021. In particular, we analyzed Multi Temporal Interferometric Synthetic Aperture Radar
and Global Navigation Satellite System data, showing a pronounced elliptical uplift signal, which we
elaborated using analytical source modeling. Additionally, seismic data were used to identify seismicity
associated with hydrothermal system activity and assess its temporal evolution. The results indicate that the
observed deformation is consistent with the expansion of the hydrothermal system within the La Fossa Caldera.
These findings align with the analysis of seismic data, revealing signals indicative of hydrothermal activity,
such as Very Long Period events. The results suggest that the ongoing phenomenon since 2021 represents a
hydrothermal unrest, similar to the one observed during the late 1970s to early 1990s.
Description:
This study has been partly funded by the
Italian DPC, in the frame of INGVDPC
(2022–2025) and IREA-DPC
(2022–2024) agreements. This paper does
not necessarily represent DPC official
opinion and policies. We also acknowledge
the support of EPOS-RI, including
the one obtained through the EPOS-Italia
JRU. This work benefited also from the
Progetto ORME, INGV Project “Pianeta
Dinamico” - Working Earth (CUP 1466
D53J19000170001 - legge 145/2018)
(Scientific Responsibility: F.G.). The
authors express their gratitude to Thomas
Walter and an anonymous reviewer for
their comments and suggestions, and to
the editor Christian Huber for overseeing
the article. This research was also
partially funded by the European Union -
NextGeneratonEU through the following
projects: NRRP - MEET (National Recovery
and Resilience Plan - Monitoring
Earth's Evolution and Tectonics), ICSC -
CN-HPC - PNRR M4C2 Investimento 1.4
- CN00000013, GeoSciences IR - PNRR
M4C2 Investimento 3.1 - IR0000037.
Description:
Published
Description:
e2023GL104952
Description:
OSV2: Complessità dei processi vulcanici: approcci multidisciplinari e multiparametrici
Description:
JCR Journal
Keywords:
Vulcano Island
;
InSAR
;
GNSS
;
P-SBAS
;
Seismic activity
;
Hydrothermal system
;
Volcanic unrest
;
Phreatic explosions
;
04.08. Volcanology
Repository Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Type:
article
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