An HVO geologist documents a flowing ‘a‘ā channel that twists down the pali. The center of the channel in the photo is mostly obscured by levees of rubbly ‘a‘ā, pushed to the edges as the lava flowed. At the bottom left, the levee has not built up as high, so some molten lava from the channel is exposed. Photo taken Tuesday, February 20, 2018 courtesy of U.S. Geological Survey