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Article

Long-Term Monitoring with Fiber Optics Distributed Temperature Sensing at Campi Flegrei: The Campi Flegrei Deep Drilling Project

1
Istituto Nazionale di Geofisica e Vulcanologia Sezione di Napoli, Via Diocleziano 328, 80124 Napoli, Italy
2
Università della Campania “Luigi Vanvitelli”-Dipartimento di Ingegneria, Via Roma 29, 81031 Aversa, Italy
3
Optosensing S.r.L., Via C. De Marco, Napoli 80134, Italy
*
Author to whom correspondence should be addressed.
Sensors 2019, 19(5), 1009; https://doi.org/10.3390/s19051009
Received: 25 January 2019 / Revised: 20 February 2019 / Accepted: 25 February 2019 / Published: 27 February 2019
(This article belongs to the Special Issue Optical Fiber Sensors: Development and Applications)
Monitoring volcanic phenomena is a key question, for both volcanological research and for civil protection purposes. This is particularly true in densely populated volcanic areas, like the Campi Flegrei caldera, which includes part of the large city of Naples (Italy). Borehole monitoring of volcanoes is the most promising way to improve classical methods of surface monitoring, although not commonly applied yet. Fiber optics technology is the most practical and suitable way to operate in such high temperature and aggressive environmental conditions. In this paper, we describe a fiber optics Distributed Temperature Sensing (DTS) sensor, which has been designed to continuously measure temperature all along a 500 m. deep well drilled in the west side of Naples (Bagnoli area), lying in the Campi Flegrei volcanic area. It has then been installed as part of the international ‘Campi Flegrei Deep Drilling Project’, and is continuously operating, giving insight on the time variation of temperature along the whole borehole depth. Such continuous monitoring of temperature can in turn indicate volcanic processes linked to magma dynamics and/or to changes in the hydrothermal system. The developed monitoring system, working at bottom temperatures higher than 100 °C, demonstrates the feasibility and effectiveness of using DTS for borehole volcanic monitoring. View Full-Text
Keywords: fiber optics sensing; distributed temperature sensing; temperature calibration; volcanic monitoring; Campi Flegrei caldera fiber optics sensing; distributed temperature sensing; temperature calibration; volcanic monitoring; Campi Flegrei caldera
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MDPI and ACS Style

Somma, R.; Troise, C.; Zeni, L.; Minardo, A.; Fedele, A.; Mirabile, M.; De Natale, G. Long-Term Monitoring with Fiber Optics Distributed Temperature Sensing at Campi Flegrei: The Campi Flegrei Deep Drilling Project. Sensors 2019, 19, 1009. https://doi.org/10.3390/s19051009

AMA Style

Somma R, Troise C, Zeni L, Minardo A, Fedele A, Mirabile M, De Natale G. Long-Term Monitoring with Fiber Optics Distributed Temperature Sensing at Campi Flegrei: The Campi Flegrei Deep Drilling Project. Sensors. 2019; 19(5):1009. https://doi.org/10.3390/s19051009

Chicago/Turabian Style

Somma, Renato, Claudia Troise, Luigi Zeni, Aldo Minardo, Alessandro Fedele, Maurizio Mirabile, and Giuseppe De Natale. 2019. "Long-Term Monitoring with Fiber Optics Distributed Temperature Sensing at Campi Flegrei: The Campi Flegrei Deep Drilling Project" Sensors 19, no. 5: 1009. https://doi.org/10.3390/s19051009

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