The Use of Satellite TIR Time Series for Thermal Anomalies’ Detection on Natural and Urban Areas

Silvestri, Malvina; Rabuffi, Federico; Musacchio, Massimo; Teggi, Sergio; Buongiorno, M. F.

doi:10.3390/engproc2021005005

Cited by 2 publications

(4 citation statements)

References 9 publications

(15 reference statements)

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“…Campi Flegrei is a volcanic caldera located in southern Italy, west of the city of Naples, well known by the scientific community because of the very high volcanic risk associated. It is indeed a highly urbanized area undergoing periodic phases of unrest, causing inflation or deflation with ground deformation rate up to some mm/month and several related effects such as shallow depth seismic swarms 1 , 2 , soil temperature variations and degassing in the caldera center, i.e in the Solfatara-Pisciarelli volcanic district 3 – 5 . Such phenomenon of ground displacement, known as the Campi Flegrei bradyseism , has also been mapped by archaeological records 6 , 7 .…”

Section: Background and Summarymentioning

confidence: 99%

Thirty years of volcano geodesy from space at Campi Flegrei caldera (Italy)

et al. 2022

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This work provides the mean ground deformation rates and ground displacement time series of the Campi Flegrei caldera (Italy) retrieved by satellite remote sensing data analysis from 1992 to 2021. Synthetic Aperture Radar (SAR) images acquired by ERS 1–2 (1992–2002), Envisat (2003–2011) and Cosmo-SkyMed (2011–2021) are processed by multi-temporal SAR Interferometry (InSAR) approach using the same technique, parameters and reference system, to obtain for the first time a homogeneous and time-continuous dataset. The validation of the InSAR products is carried out by comparison with the measurements provided by precise levelling lines and cGNSS stations. The produced outcomes offer an overview on the temporal behaviour of ground deformation at Campi Flegrei along an unprecedented time window of about 30 years and can be exploited by the scientific community for supporting and improving the knowledge of the dynamics of the caldera.

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Section: Background and Summarymentioning

confidence: 99%

Thirty years of volcano geodesy from space at Campi Flegrei caldera (Italy)

et al. 2022

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“…The images used in this work ( Table 2 ) were provided by the USGS EarthExplorer platform ( , accessed on 22 February 2022). For the thermal analyses, only nighttime data were used to minimize the effects of topography and surface insolation [ 25 , 26 , 27 , 44 ].…”

Section: Methodsmentioning

confidence: 99%

“…Due to the difficulty in quantitatively measuring the surface temperature due to pixel saturation problems or atmospheric attenuation, some studies are based on determining pixel value thresholds by isolating the background temperature found in each image. The anomalous pixel value may be above average plus a standard deviation (σ), as in [ 24 ], above average +2σ [ 25 ], or with multiple thresholds [ 26 ], since a maximum temperature in one image can represent a normality scenario in another [ 16 , 27 ].…”

Section: Introductionmentioning

confidence: 99%

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Detection of Geothermal Anomalies in Hydrothermal Systems Using ASTER Data: The Caldeiras da Ribeira Grande Case Study (Azores, Portugal)

Uchôa

Viveiros

Tiengo

et al. 2023

Sensors

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Current-day volcanic activity in the Azores archipelago is characterized by seismic events and secondary manifestations of volcanism. Remote sensing techniques have been widely employed to monitor deformation in volcanic systems, map lava flows, or detect high-temperature gas emissions. However, using satellite imagery, it is still challenging to identify low-magnitude thermal changes in a volcanic system. In 2010, after drilling a well for geothermal exploration on the northern flank of Fogo Volcano on São Miguel Island, a new degassing and thermal area emerged with maximum temperatures of 100 °C. In the present paper, using the ASTER sensor, we observed changes in the near-infrared signals (15 m spatial resolution) six months after the anomaly emerged. In contrast, the thermal signal (90 m spatial resolution) only changed its threshold value one and a half years after the anomaly was recognized. The results show that wavelength and spatial resolution can influence the response time in detecting changes in a system. This paper reiterates the importance of using thermal imaging and high spatial resolution images to monitor and map thermal anomalies in hydrothermal systems such as those found in the Azores.

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The Use of Satellite TIR Time Series for Thermal Anomalies’ Detection on Natural and Urban Areas

Cited by 2 publications

References 9 publications

Thirty years of volcano geodesy from space at Campi Flegrei caldera (Italy)

Thirty years of volcano geodesy from space at Campi Flegrei caldera (Italy)

Detection of Geothermal Anomalies in Hydrothermal Systems Using ASTER Data: The Caldeiras da Ribeira Grande Case Study (Azores, Portugal)

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