Lava Eruption Update 2025

Episode 12 of the Halemaʻumaʻu eruption of Kīlauea within Hawaiʻi Volcanoes National Park ended at 10:37 a.m. HST on March 5 after just under 22 hours of continuous eruptive activity. Fountaining from the south vent ceased at 10:35 a.m. at the same time summit deflation changed to inflation and tremor decreased.

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Episodes of Halemaʻumaʻu lava fountaining since December 23, 2024, have continued for 13 hours to 8 days and episodes have been separated by pauses in eruptive activity lasting from less than 24 hours to 12 days. While episode 12 began with intermittent eruption at 7:30 a.m. HST, continuous eruption did not begin until 12:45 p.m. HST and lasted for just under 22 hours.

Staff at the USGS Hawaiian Volcano Observatory made observations of lava fountaining during episode 12 of the eruption in Halemaʻumaʻu, at Kīlauea summit. Both the north and south vents were active during the evening of March 4, 2025, when these videos were taken. Lava fountains reached up to 300 feet (90 meters) during episode 12, depositing tephra on the rim west of the vents.