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Authors: Chiodini, G.*
Vilardo, G.*
Augusti, V.*
Granieri, D.*
Caliro, S.*
Minopoli, C.*
Terranova, C.*
Title: Thermal monitoring of hydrothermal activity by permanent infrared automatic stations: Results obtained at Solfatara di Pozzuoli, Campi Flegrei (Italy)
Title of journal: J. Geophys. Res.
Series/Report no.: / 112 (2007)
Publisher: AGU
Issue Date: 28-Dec-2007
DOI: 10.1029/2007JB005140
Keywords: Termal Monitoring of Hydrothermal
Abstract: A permanent automatic infrared (IR) station was installed at Solfatara crater, the most active zone of Campi Flegrei caldera. After a positive in situ calibration of the IR camera, we analyze 2175 thermal IR images of the same scene from 2004 to 2007. The scene includes a portion of the steam heated hot soils of Solfatara. The experiment was initiated to detect and quantify temperature changes of the shallow thermal structure of a quiescent volcano such as Solfatara over long periods. Ambient temperature results as the main parameter affecting IR temperatures while air humidity and rain control image quality. A geometric correction of the images was necessary to remove the effects of slow movement of the camera. After a suitable correction the images give a reliable and detailed picture of the temperature changes, over the period October 2004 – January 2007, which suggests origin of the changes were linked to anthropogenic activity, vegetation growth and to the increase of the flux of hydrothermal fluids in the area of the hottest fumaroles. Two positive temperature anomalies were registered after the occurrence of two seismic swarms which affected the hydrothermal system of Solfatara in October 2005 and October 2006. It is worth noting that these signs were detected in a system characterized by a low level of activity with respect to systems affected by real volcanic crisis where more spectacular results will be expected. Results of the experiment show that this kind of monitoring system can be a suitable tool for volcanic surveillance.
Appears in Collections:04.08.07. Instruments and techniques
04.08.06. Volcano monitoring
03.04.06. Hydrothermal systems
Papers Published / Papers in press

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