During today's overflight of Kīlauea summit, both thermal and visual camera

During today's overflight of Kīlauea summit, both thermal and visual cameras were used to characterize activity. Comparing thermal (left) to visual (right) images of nearly the same view, you can see that the growing crater lake at Kīlauea's summit remains hot. Steam emanates from the lake surface in the visual image on the right, and the yellow and red colors in the thermal image indicate that the lake has a hotter surface temperature relative to the rocks and rubble around it. The lake isn't the only hot feature within Halema‘uma‘u, however, fumaroles on the crater wall, which stand out as white areas indicating alteration in the visual image, also stand out as bright white spots in the thermal image. USGS photo by K. Mulliken.