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The episode 61g flow from Pu‘u ‘Ō‘ō continues advancing downslope. In this photo, the current flow is the lighter color area along the center of the image. The flow front has advanced about 770 m (0.5 miles) since the June 16 overflight, which equates to an advance rate of about 100 m per day (330 ft per day). The flow front was roughly 100 m (330 ft) from the northern boundary of the abandoned Royal Gardens subdivision. Pu‘u ‘Ō‘ō, and its plume, are visible near the top of the image.
The lava pond in the western portion of Pu‘u ‘Ō‘ō crater remains active, and has enlarged since our last observation. The pond today was about 50 m (160 ft) in diameter, with spattering along the western margin.
An HVO geologist collects a fresh lava sample for chemical analysis. The lobe being sampled was typical of the many scattered pāhoehoe breakouts along the flow margin today.
HVO geologists conduct a VLF (very low frequency) survey across the episode 61g lava tube to measure the depth and cross-sectional area of lava flowing within the tube.
Incandescent vents are still open on the northeast flank of Pu‘u ‘Ō‘ō. From the ground, no views of the lava were possible because the area around the vent was too unstable and dangerous to approach.
An aerial view of the same vent shown at left provided a look of the lava stream within the deep cavity.
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