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This thermal image, looking east, shows the two perched lava ponds within Pu‘u ‘Ō‘ō crater. The eastern perched pond was just below the level of the east rim today.
This photograph shows a close-up of the perched lava pond abutting the east rim of Pu‘u ‘Ō‘ō crater. The lava was just a meter (yard) or so below the low point on the rim, and was close to spilling over.
This vertical view from today's overflight shows the layout of activity within Pu‘u ‘Ō‘ō crater. The shiny area towards the right portion of the crater floor is the eastern perched lava pond, while the shiny area in the left portion of the crater floor (close to the center of the image) is the western perched pond.