Images

Aerial photo taken during a morning overflight on October 1, 2021, and looking at the west end of the lava lake within Halema‘uma‘u crater, at the summit of Kīlauea. The west vent that is feeding this part of the lava lake is visible; the base of this vent was well above the lava lake when it opened on the afternoon of September 29, 2021.

In the afternoon of October 1, 2021, Hawaiian Volcano Observatory scientists observed the ongoing eruption within Halemaʻumaʻu from the northwest rim of the crater at Kīlauea's summit.

A view of the new eruption within Halema'uma'u at Kīlauea summit at approximately 9 a.m. HST on the morning of October 1, 2021.

View looking down at the September-October 2021 lava lake eruption of Halemaʻumaʻu from the F1 thermal camera located on the western rim of the crater at Kīlauea’s summit. Molten material appears as warmer colors of yellow, orange, and pink, whereas cooler material is represented by dark blue and purple colors.

A helicopter overflight on October 1, 2021, at approximately 10 a.m. HST allowed for aerial visual and thermal imagery to be collected of Halema‘uma‘u crater at the summit of Kīlauea. The scale of the thermal map ranges from blue to red, with blue colors indicative of cooler temperatures and red colors indicative of warmer temperatures.

A telephoto view of the south-central and western fissure fountains that continue to erupt lava into the growing lava lake at Kīlauea summit. The lava lake and eruptive activity are confined within Halemaʻumaʻu crater, in Hawai‘i Volcanoes National Park.

Two vents on the western wall of Halema‘uma‘u crater, at Kīlauea summit, remain active. The western fissure opened about an hour and a half (around 4:40 p.m.) after the eruption began on Sept. 29, 2021. The pinkish and black area within the lava lake (near the center of the photo) is the partially submerged west vent that formed during the Dec.

A helicopter overflight on October 1, 2021, at approximately 10 a.m. HST allowed for aerial visual and thermal imagery to be collected of Halema‘uma‘u crater at the summit of Kīlauea. The scale of the thermal map ranges from blue to red, with blue colors indicative of cooler temperatures and red colors indicative of warmer temperatures.

A helicopter overflight the morning of October 1, 2021, provided aerial views of the eruption within Halema‘uma‘u, at Kīlauea's summit. This view, looking to the west, shows an active lava fountain located within the south-central part of the lava lake. This fountain is only a few meters (yards) high. USGS photo by D. Downs.

Aerial view of the active lava lake and vents within Halema‘uma‘u crater, at the summit of Kīlauea. This view is looking to the northwest.

Aerial image looking to the southwest and showing fissures within Halema‘uma‘u, at Kīlauea's summit, producing lava fountains within the southern and south-central part of the lava lake. These lava fountains are less energetic than when the eruption started on September 29, 2021, but are still spattering to heights of about 5 meters (16 ft) or less.

The Kīlauea summit eruption continues within Halemaʻumaʻu crater, in Hawai‘i Volcanoes National Park. This wide view of the new lava lake was taken this morning, October 1, 2021, during a Hawaiian Volcano Observatory eruption overflight.

A telephoto view of the western fissure that opened in the wall of Halemaʻumaʻu crater, during the new Kīlauea summit eruption. Spatter from the lava fountains have built a horseshoe-shaped cone (black lava) surrounding the upper part of the fountain, while lava flows into the lava lake at the base of the vent.

The growing lava lake within Halemaʻumaʻu, at the summit of Kīlauea, has risen roughly 27 m (89 ft) since the eruption started on September 29, 2021 at 3:21 p.m. HST. The eruption began with a fissure opening along the floor of Halemaʻumaʻu, through the surface of the solidified 2020–21 lava lake.

This telephoto image of the lava lake margin was taken during a Hawaiian Volcano Observatory Kīlauea summit eruption overflight this morning. The lava lake within Halemaʻumaʻu crater is forming a “perched” levee around parts of the lake perimeter.

This telephoto image shows two vents that formed on the western wall of Halema‘uma‘u crater during the current eruption of Kīlauea, which began on September 29, 2021. The photo was taken from the southern rim of Halema‘uma‘u crater at 9:02 a.m. HST on Oct.

This overview photo of the lava lake within Halema‘uma‘u was captured from the west rim of the crater shortly after noon on September 30, 2021. Several fissures, erupting through the lava lake, stretch from the lake's center to its southern (right) margin.

On the evening of September 30, 2021, linear fissures remained active in the middle of the Halema‘uma‘u lava lake at Kīlauea. This photo was taken from the south, looking north, in a closed area of Hawai‘i Volcanoes National Park, where USGS Hawaiian Volcano Observatory monitor the eruption with National Park Service permission. USGS Photo by K. Lynn.

On September 30, 2021, a Hawaiian Volcano Observatory gas scientist takes notes based on the spectra being displayed by the field laptop, which is connected to a FTIR spectrometer on the rim of Halema‘uma‘u crater.

Aerial image of eruption in Halemaʻumaʻu at Kīlauea Volcano's summit taken during an overflight at approximately 7:30 a.m. HST on September 30, 2021. In this image, multiple active fountaining sources are visible in the central and western portions of Halemaʻumaʻu.

Aerial image of eruption in Halemaʻumaʻu at Kīlauea Volcano's summit taken during an overflight at approximately 7:30 a.m. HST on September 30, 2021. Lava continues to erupt from multiple vents along the floor and western wall of Halemaʻumaʻu crater. As of this afternoon all lava activity is confined within Halemaʻumaʻu Crater.