USGS Hawaiian Volcano Observatory geologists observed episode 7 of the Kīlauea Halema‘uma‘u eruption on the morning of January 28, 2025. The eruption resumed in both the north and south vents with fissure fountains and outpouring of lava flows on the caldera floor. Geologists measured fountain heights at approximately 30 m (98 ft) for the south vent and 40-45 m (130-145 ft) for north vent at 7:40 a.m. HST. This photo is looking north. USGS photo by H. Winslow.

Telephoto view of both eruptive vents in the Kīlauea Halema‘uma‘u eruption during episode 7 on January 28, 2025. Both vents reactivated during this episode. The north vent (upper left vent) fountain produced lava channels outpouring from its base but also out the sides of the vent as seen in this photo. A small channel flows from the north vent towards the south vent. USGS photo by H. Winslow.

View of the south vent erupting during episode 7 of the Kīlauea Halema‘uma‘u eruption. The south vent reactivated for episode 7 (January 27-28) though it was relatively inactive during the prior episode 6. The vent shows a fountain and lava flow channel originating from the base of the cone. Lava has pooled at its base and flows down to the caldera floor. Fountain heights for the south vent were about 30 m (98 ft) high at 7:40 a.m. HST on January 28, 2025. USGS photo by H. Winslow.

Overview photo of episode 7 from the Kīlauea Halema‘uma‘u eruption. This photo was taken the morning of January 28, 2025, during a USGS Hawaiian Volcano Observatory morning monitoring field shift. Both vents (north and south) were active during this episode, with fountains and lava flows. Lava flows generally exit the cone from its base and flow into the caldera; however, lava flows exited the sides of the vents as well during episode 7. Lava flowed from the base of the north vent as well as out the side, where it flowed toward the south vent. The north vent had fountains reaching 45 m (145 ft) while the south vent had fountains reaching about 30 m (98 ft). Wind speeds were mild during the morning of January 28, allowing the eruptive plume to buoyantly rise up. This photo is looking northeast. USGS photo by H. Winslow.