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Figure 5 | Journal of Applied Volcanology

Figure 5

From: Continuous monitoring of Hawaiian volcanoes with thermal cameras

Figure 5

At Kīlauea, thermal cameras can see through fume that obscures views to conventional webcams. Visible webcam (left) and thermal (right) images are shown for corresponding times, for Halema‘uma‘u (top) and Pu‘u ‘Ō‘ō (bottom). For Halema‘uma‘u, note how the thermal camera (b) shows the active lava lake clearly even when the gas plume completely obscures the view to the visible webcam (a) and naked eye. For Pu‘u ‘Ō‘ō, note how the thermal camera (d) shows the extent of the small lava flow (right in image) and lava pond (left in image) very clearly, while the size and shape of these features are ambiguous in the visible webcam (c). The thermal images have not been corrected for atmospheric or volcanic gas effects, and actual surface temperatures may be higher than the apparent temperatures shown here.

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