A line of spattering along the northwest lake margin on Sunday, April 22. Note that the spatter is being ejected well above the level of the Halema‘uma‘u Crater floor, with occasional small bits landing on the rim. At the left end of the spattering, a piece of the thin, flexible crust on the lava lake is lifted and torn by a bubble burst. Photo taken Sunday, April 22, 2018 courtesy of U.S. Geological Survey