The Unoccupied Aircraft System (UAS) that collected water from the crater lake in Halema‘uma‘u on October 26 was outfitted with both visual and infrared (thermal
) cameras. This reconnaissance video shows fumarolic
activity on the walls of the crater. Fumaroles
appear light in color (yellow and white) in the visual imagery due to alteration of the crater wall rock. In the thermal image (upper left inset), lighter colors indicate warmer temperatures associated with the fumaroles
. Limited UAS flights in this area are conducted with permission from and coordination with Hawai‘i Volcanoes National Park. The information is used to assess hazards at Kīlauea's summit and is shared with the National Park Service and emergency managers.