Kīlauea summit eruption in Halemaʻumaʻu crater - September 30, 2021

This zoomed-in photo of the western fissure within Halema‘uma‘u was captured at 9:00 a.m. on September 30, 2021. Eruptive activity at this location is very similar to that of the northern fissure from the December 2020 eruption, with lava fountains feeding a short cascade down to the rising lava lake. Using a laser rangefinder, field crews estimated that these fountains were reaching heights of 10–12 m (33–39 ft) above their base. USGS photo by M. Zoeller.