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Earth, Planets and Space
Fig. 3 | Earth, Planets and Space

Fig. 3

From: Continuous monitoring of the 2015–2018 Nevado del Ruiz activity, Colombia, using satellite infrared images and local infrasound records

Fig. 3

An example of automatized analyses by REALVOLC. a The target area at NRV for the thermal analyses. b Thermal radiance as a function of Julian day. The radiance of a pixel in the 3.9-μm band (red crosses) responds to hotspots in the pixel, while that in the 11-μm band (green crosses) represents the mean temperature. We use the 3.9-μm band to detect thermal anomaly and the 11-μm band to estimate the background temperature

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