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Started streaming on Dec 15, 2025
USGS REPORT Jan 10: Lava overflowed intermittently from the north and south vents in Halemaʻumaʻu overnight with only short breaks between flows. Dome fountaining and spattering have increased this morning along with tremor. Kīlauea summit region showed some overnight inflation on tiltmeter UWD but changed to a slight deflation with the onset of dual overflows this morning. Forecasting models suggest the window for episode 40 sustained lava fountaining is between January 10 and 14 but current activity suggests that episode 40 fountaining could begin anytime. Kīlauea’s East Rift Zone and Southwest Rift Zone remain quiet.

The four lava overflows that began on the afternoon of January 8 from the south vent transitioned to nearly continuous overflows from the north vent most of last night and this morning. At 5:12 a.m. HST this morning overflows began again from the south vent fed by 10 foot (3 meter) dome fountains while north vent flows diminished but spattering continued. Both vents began overflowing together around 7:00 a.m. with intermittent pauses of 5-10 minutes. Activity increased just before 7:30 a.m. and fountains roughly doubled in size to 20 feet (6 meters) and have remained constant since then. Seismic tremor increased around 7:00 a.m. when both fountains became active and again at 7:30 a.m. HST as fountaining intensity increased. Fountain heights and tremor have remained relatively constant since then.