COURTESY U.S. GEOLOGICAL SURVEY
This aerial photo taken at 9:30 a.m. Dec. 26 shows Halemaumau Crater changes due to the ongoing Kilauea eruption. Around 2:40 a.m., the western fissure, which nearly inactive for several days, increased activity as all three vents started producing spatter and streams of lava. Shortly before 3 a.m., the northern vent, which was the most active, was drowned by the lava lake and became inactive.