A new eruptive episode started at Kīlauea’s Halemaʻumaʻu crater at 13:11 UTC (03:11 HST) on September 19, 2025, producing lava fountains over 150 m (500 feet) and a volcanic plume up to 3 000 m (10 000 feet) high. The eruption remains confined to the summit caldera within Hawaiʻi Volcanoes National Park.
Kīlauea summit, Hawaii, is showing strong gas pistoning and overflows ahead of the next eruptive episode, with Pele’s hair and volcanic gas already affecting the summit area and nearby communities. The Hawaiian Volcano Observatory (HVO) warns that episode 33 lava fountaining is expected to begin over the next 1 to 3 days.
Episode 32 of the Halemaʻumaʻu eruption at Kīlauea volcano, Hawaii, began at 16:35 UTC (06:35 HST) on September 2, 2025, producing lava fountains up to 150 m (500 feet) high. The eruption remains confined to the summit crater within Hawai‘i Volcanoes National Park.
Episode 23 of the Halemaʻumaʻu eruption at Kīlauea volcano, Hawaiʻi, began at 16:15 HST on May 25, 2025, with lava fountains exceeding 300 m (1 000 feet) from the north vent.
Kīlauea’s 2018 eruption released volcanic ash that contributed to a large phytoplankton bloom 1 930 km (1 200 miles) away in the North Pacific. The bloom, spanning 1.5 million km², was one of the largest recorded in the region.
Lava fountains reached 215 m (700 feet) at Kilauea volcano on Tuesday, April 1, 2025, during episode 16 of the ongoing Halemaʻumaʻu eruption.
Episode 13 of Kīlauea’s ongoing eruption at Halema’uma’u crater ended at 01:13 UTC on March 12, 2025, after 12 hours and 37 minutes of lava fountaining. Lava covered over 60% of the summit floor, and sulfur dioxide (SO2) emissions peaked at 40 000 tonnes per day.
Episode 12 of the ongoing Halema’uma’u eruption began at 07:30 LT (17:30 UTC) on Tuesday, March 4, 2025, with sporadic lava flows from the north and south vents. Continuous fountaining reached heights of 150–165 m (490–540 feet) by 00:20 UTC on March 5 and is expected to increase further. The eruption is part of the ongoing activity that started on December 23, 2024. The USGS maintains the Volcano Alert Level at Watch and the Aviation Color Code at Orange.
Episode 9 of the ongoing Halemaʻumaʻu eruption began at 10:16 LT (20:16 UTC) on February 11, 2025, producing lava fountains up to 100 m (330 feet) high. The eruption is part of the activity that started on December 23, 2024. The USGS maintains the Volcano Alert Level at Watch and the Aviation Color Code at Orange.
Volcanologists reporting in Oxford’s Academic Journal of Petrology have confirmed that the Kīlauea and Mauna Loa volcanoes share a deep magma source within the Hawaiian plume.
