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Earth, Planets and Space
Fig. 4 | Earth, Planets and Space

Fig. 4

From: The thermal signature of Aso Volcano during unrest episodes detected from space and ground-based measurements

Fig. 4

Elaboration sequence of high-resolution images a False color (R: 2.2 µm; G: 1.6 µm; B: 0.8 µm) Landsat 8 image acquired over Asosan volcano on March 2, 2015. This kind of maps is automatically downloaded from Amazon Sentinel Playground; b Thermal index (TI) map calculated from the RGB image according to Eqs. 2 and 3. Note how the thermal anomaly produced by the fumarole field becomes more evident; c Stacked vertical profile obtained by calculating the maximum TI of each row. d Color bar derived from the thermal profile shown in c

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