Great quantities of lava pour from the base of a 480-m-tall (1,575 ft) fountain about 65 minutes after the start of episode 16. Lava discharge at this time was about 1.3 million cubic meters per hour (1.7 million cubic yards), which sent lava over the entire lake by 4:05 a.m. The lava fountain illuminates the top of Pu‘u Pua‘i cone, which is about half as high as the fountain. The arcuate pattern of glow just below the summit of the cone is the headwall scarp of a slide that earlier plunged into the vent area.