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Some Investigations on a Possible Relationship between Ground Deformation and Seismic Activity at Campi Flegrei and Ischia Volcanic Areas (Southern Italy)

1
Istituto Nazionale di Geofisica e Vulcanologia, Sezione di Napoli—Osservatorio Vesuviano, 80124 Naples, Italy
2
Dipartimento di Ingegneria dell’Informazione ed Elettrica e Matematica applicata/DIEM, Università degli Studi di Salerno, 84084 Fisciano, Italy
*
Author to whom correspondence should be addressed.
Geosciences 2019, 9(5), 222; https://doi.org/10.3390/geosciences9050222
Received: 19 March 2019 / Revised: 19 April 2019 / Accepted: 8 May 2019 / Published: 15 May 2019
(This article belongs to the Special Issue Volcano Monitoring – Placing the Finger on the Pulse)
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Abstract

In the present paper, we analyse ground tilt and seismicity at Campi Flegrei caldera and Ischia Island, two volcanic areas located in the south of Italy. These areas have been well studied for many years from a petrological, volcanological and geophysical view point. Moreover, due to the high seismic and volcanic risk for the populations living there, they are continuously monitored by networks of geophysical and geochemical sensors. We summarize the most important results that we obtained so far, concerning the observations of relationships between seismic activity and ground tilt anomalies, focusing on the time interval 2015–2018. First, we present a detailed description of the tiltmeter and seismic networks in both the investigated areas, as well as their development and improvement over time that has enabled high quality data collection. From the joint analysis of the seismic and borehole tiltmeter signals, we often notice concurrence between tilt pattern variations and the occurrence of seismicity. Moreover, the major tilt anomalies appear to be linked with the rate and energy of volcano-tectonic earthquakes, as well as with exogenous phenomena like solid Earth tides and hydrological cycles. The analysis that we present has potential applicability to other volcanic systems. Our findings show how the joint use tilt and seismic data can contribute to better understanding of the dynamics of volcanoes. View Full-Text
Keywords: ground deformation; seismic phenomena; Campi Flegrei Caldera; Ischia Island; volcanic risk; seismic and tiltmeter networks; ground tilt anomalies ground deformation; seismic phenomena; Campi Flegrei Caldera; Ischia Island; volcanic risk; seismic and tiltmeter networks; ground tilt anomalies
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Ricco, C.; Petrosino, S.; Aquino, I.; Del Gaudio, C.; Falanga, M. Some Investigations on a Possible Relationship between Ground Deformation and Seismic Activity at Campi Flegrei and Ischia Volcanic Areas (Southern Italy). Geosciences 2019, 9, 222.

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