Images

Views of Kīlauea summit eruption lava fountaining episode 38 in Halema‘uma‘u crater on the Island of Hawai‘i, with ‘ōhi‘a lehua in the foreground. USGS photo by K. Mulliken.

A USGS Hawaiian Volcano Observatory field crew captured this photo of Kīlauea summit eruption episode 38 from the southern rim of Halemaʻumaʻu just after noon on December 6. This was shortly after the north vent shut down, so only south vent lava fountains were ongoing, measured to reach 920 feet (280 meters) in height at the time. USGS photo by M.

On December 6, USGS Hawaiian Volcano Observatory geologists monitored and measured the Kīlaeua summit eruption episode 38 from multiple vantage points. This photo was captured around 10:00 a.m. from the northwest rim of the crater, near the V1 live-streaming webcam, with vigorous lava fountains underway at both the north and south vents. USGS photo by M.

The V3 camera was located on the south rim of Halema‘uma‘u crater at the summit of Kīlauea volcano on the Island of Hawai‘i. The camera, located in a hazardous closed area of Hawai‘i Volcanoes National Park, was buried by tephra from an inclined lava fountain between 9:55 and 9:57 am HST on December 6, during episode 38 that began this morning at 8:45 am.

During Kīlauea summit eruption episode 38 on December 6, "tephra-nadoes" made a return, as seen to the left of the lava fountain in this photo. Swirling winds in the tephra fallout plume led to this short-lived twister, spotted by a field crew on the southern rim of Halemaʻumaʻu crater.

Top left photo: An HVO scientist stands next to a garden stake with 20-cm (8-in) intervals marked in blue, next to an old road sign that had been progressively buried by tephra during episodes 1-21; this photo was taken May 15. The next day, episode 22 completed buried the garden stake.

This aerial photograph, taken during a USGS Hawaiian Volcano Observatory monitoring overflight the morning of December 2, 2025, shows volcanic gas wafting over the tephra-blanketed rim of Halemaʻumaʻu crater. The ripple-like deposits on the right side of the image, on the crater rim, are spatter-fed lava flows that formed during episode 34 on October 1.

The north and south vents were degassing during a USGS Hawaiian Volcano Observatory monitoring overflight of Kīlauea summit on December 2, 2025. Eruptive activity at these vents was paused on December 2, following 9 hours of lava fountaining during episode 37 on November 25, but a spattering lava surface was visible deep within both vents. USGS photo by K.

An aerial image of Halemaʻumaʻu crater, showing the degassing eruptive vents in the southwest part of the crater (background) and lava flows erupted during episode 37 on November 25 (foreground. This image was taken during a USGS Hawaiian Volcano Observatory monitoring overflight of Halema‘uma‘u crater on December 2, 2025. USGS photo by K. Mulliken. 

This black solidified lava channel is a stark contrast to the weathered brown walls of Halemaʻumaʻu crater nearby. The lava channel transported lava from the north vent, along the north rim of the crater, allowing lava flows to reach the farthest regions of the crater to the east during the 9 hours of lava fountaining of episode 37 on November 25, 2025.

An aerial view of the volcanic vents in the southwest part of Halemaʻumaʻu crater, at the summit of Kīlaeua volcano. USGS photo by H. Winslow on December 2, 2025.  

The USGS Hawaiian Volcano Observatory often gets asked how long it will take the lava flows to fill in Halemaʻumaʻu crater and spill onto the upper caldera floor of Kīlauea. This photo, taken from the floor of the crater, shows the lava flows from episode 37 (November 25) where they contact the north wall of the crater, which rises several hundred feet above.

An aerial view of the north (right) and south (left) vents in Halema'uma'u, taken during a USGS Hawaiian Volcano Observatory monitoring overflight the morning of December 2, 2025. Both vents were actively degassing, and a spattering lava surface was visible deep within their conduits.  USGS photo by D. Downs

The steaming north wall of Halemaʻumaʻu crater wall rises several hundred feet above the lava flows that cover the floor of the crater.

This aerial photograph shows Kīlauea, Mauna Loa and Mauna Kea. In the foreground is the forested area just north of Kīlauea caldera; the slope of Mauna Loa's Northeast Rift Zone rises to the left side of the image, while Mauna Kea is visible in the background. USGS photo by K. Mulliken. 

During a USGS Hawaiian Volcano Observatory monitoring overflight the morning of December 2, 2025, geologists were able to see a spattering lava surface deep within the north vent. The yellow material around the vents is native sulfur.

The left map shows the tephra fall associated with Kīlauea's episodic summit eruption, from December 2024-December 2025. Tephra is a generic word for any material erupted by a volcano that travels through the air before landing on the ground.

Calendar of the USGS-Hawaiian Volcano Observatory (HVO) Volcano Awareness Month events in January 2026, during which HVO and close partners raise awareness of Hawaii’s volcanoes and active volcanic processes that continue to influence us today. 

Upper left: a dusty lava puahiohio (at right in frame) above the main 2022 Mauna Loa lava flow on 2 December 2022, with the eruptive plume further in the background (at left in frame). Upper right: a lava puahiohio rips up the crust of the Kīlauea summit lava lake on 7 June 2023.

Flyer announcing the USGS-Hawaiian Volcano Observatory (HVO) Volcano Awareness Month events in January 2026, during which HVO and close partners raise awareness of Hawaii’s volcanoes and active volcanic processes that continue to influence us today. 

Episode 37 lava fountaining occurred On November 25, from 2:30 p.m. to 11:39 p.m., totaling just over 9 hours. Fountains were limited to the north vent, which sent lava flows over a large portion of the crater floor. Fountain heights reached 500-600 ft (150-180 meters). The south vent showed only weak spattering and flaming. USGS photo by M. Patrick.