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The thermal camera today showed surface temperatures on the water pond in Halema‘uma‘u of approximately 70 C (158 F), similar to previous observations. There were no significant changes observed during today's visit, and the water level continues to slowly rise. USGS images by M. Patrick, 09/17/2019 (Public domain.)
Shown at 30x speed, this video highlights changing activity on the surface of the water pond. Steam wafting above the pond shifts in the wind, and circulation of the water is evident in areas of sharp color boundaries. USGS video by M. Patrick, 09-17-2019.