Lava flows advancing at the summit of Kīlauea on September 10, 2023

Kīlauea started erupting on September 10, 2023, at approximately 3:15 p.m. H.S.T., from fissures which extended from the eastern margin of Halema‘uma‘u crater and onto the down-dropped block to the east within Kīlauea’s summit caldera. A large proportion of the erupted lava flowed northward until it encountered cliffs around Halema‘uma‘u crater and the summit caldera. This series of photos, taken from the western rim of Halema‘uma‘u looking east, shows lava flow advancing counterclockwise along the north (left) and then northwest (bottom) margin of Halema‘uma‘u. The first photo (top left) is from approximately 1 hour and 10 minutes after the eruption started, and the last photo (bottom right) is from approximately 3 hours and 5 minutes after the eruption started. USGS image by N. Deligne.