At 7 a.m. HST on February 12, 2025, episode 9 of Kīlauea's 2024-2025 eruption continued at both the north and south vents with fountain heights of 45-50 m (148-164 feet). The south vent fountain was inclined (at an angle) to the east. Both vents fed active lava flows that stretched over one kilometer (0.62 miles) across the floor of Halema‘uma‘u. USGS photo by K. Lynn.

Around 7 a.m. HST on February 12, 2025, USGS Hawaiian Volcano Observatory (HVO) field crews observed vigorous fountaining from both the north and south vents of the ongoing 2024-2025 eruption. The south and north cones were 31 m (102 feet) and 45 m (148 feet) tall, respectively. USGS photo by K. Lynn.

Abruptly at 8:30 a.m. HST on February 12, 2025, USGS Hawaiian Volcano Observatory field crews nearby heard the shutdown of fountaining at the north vent. Visual confirmation at 8:34 a.m. confirmed that the north vent was no longer active, and the south vent fountain was greatly reduced and no longer inclined to the east. The caldera wall behind the vents is now 180 meters (590 feet) tall. USGS photo by K. Lynn.

Over the course of ten minutes, USGS Hawaiian Volcano Observatory field crews observed the south vent activity cease until lava could no longer be seen or heard from the south vent. At 8:43 a.m. HST on February 12, 2025, episode 9 of the 2024-2025 Halema‘uma‘u eruption was over. USGS photo by K. Lynn.

Early on February 12, 2025, USGS Hawaiian Volcano Observatory field crews were able to measure lava fountain heights (45-50 m, or 148-164 feet), lava lake levels (about 19 m or 63 feet of vertical change from the fountain base to the distal lava flows), and lava flow velocities (14 meters per second, or 50 feet per second) before activity at both vents ceased over a 15 minute window. The caldera wall behind the vents is 180 meters (590 feet) tall, with about 30 meters (100 feet) of new lava added to the caldera floor in the vicinity of the vents since the eruption began on December 23, 2024. USGS photo by K. Lynn.

During a monitoring overflight at approximately 12:30 p.m., USGS Hawaiian Volcano Observatory staff observed active lava still flowing on the surface within Halema‘uma‘u. Although lava fountains of episode 9 had ceased erupting at 8:43 a.m., molten material has remained active on the surface, which has also been observed following other recent episodes of the ongoing eruption within Halema‘uma‘u at the summit of Kīlauea. USGS photo by K. Mulliken.

Clear weather during a Kīlauea summit monitoring overflight allowed for views of Mauna Kea in the distance, with the slope of Mauna Loa's Northeast Rift Zone visible on the left side of the image. Small amounts of snow from a recent storm remain visible on the slopes of Mauna Kea. USGS photo by P. Dotray.

The north and south vents in Halema‘uma‘u were partially hidden in the shadows of clouds during the monitoring overflight at 12:30 p.m. HST today, February 12, but the plumes of volcanic gas emissions helped to illuminate their positions. The closed portion of Crater Rim Drive in Hawai‘i Volcanoes National Park is visible in the left part of the photograph, with brown tephra material from the recent eruption episodes blanketing the ground surface downwind of the vents. The portion of Crater Rim Drive that collapsed into the caldera during 2018 is visible in the lower right portion of the image. USGS photo by P. Dotray.