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Clear weather afforded good views of the water pond in Halema‘uma‘u. No major changes were observed in the pond, but the water continues to slowly rise. The water surface was steaming, and its temperature was approximately 70 degrees Celsius (158 degrees Fahrenheit). For scale, the pond is about 70 meters (230 feet) long. USGS video by M. Patrick.
This wide angle view from the helicopter overflight shows the deepest part of the Kīlauea caldera with the lower flanks of Mauna Loa visible in the background. The water pond is visible at the bottom of the crater (center of image). USGS photo by C. Parcheta, 08-22-2019.
During today's overflight, HVO geologists noticed a recently exposed hole with a smoother slope descending below it in the eastern wall of Pu‘u ‘Ō‘ō. It is unclear if this is simply a rockfall or collapse feature with a debris slope or if it is part of the conduit that fed episode 61 activity. USGS photo by C. Parcheta, 08-22-2019.