Images

A close-up view of the west vent on the western crater wall of Halema‘uma‘u, at Kīlauea summit. Fountaining and lava spatter has built a cone around the vent. Lava pools in the cone and then pours into the lava lake through a small spillway. This photo was taken during a monitoring helicopter overflight on October 15, 2021. USGS photo by N. Deligne.

A telephoto view of the west vent supplying lava to the lava lake in Halema‘uma‘u, at Kīlauea summit. In the bottom right, the western fissure complex from the Dec. 2020–May 2021 eruption is visible as a spiny dull dark brown and red feature.

Hawaiian Volcano Observatory scientists make observations and collect data during Kīlauea eruption overflights. The data collected is used to construct updated topographic and thermal maps of the lava lake surface and surrounding area.

A telephoto image of the the west vent taken on the morning of October 15, during an HVO helicopter overflight of Kīlauea summit. Low lava fountaining activity continues from the vent in the western wall of Halema‘uma‘u.

The eruption within Halema‘uma‘u continues. Lava fountaining from the western vent (center) feeds a rising lava lake. Activity has decreased over the past week and much of the eastern half of the lake surface (seen here in the foreground) has cooled and formed a solid crust.

In this photo taken during a helicopter overflight of Halema‘uma‘u crater on October 15, lava can be seen fountaining within the western vent cone and flowing down a short spillway into the lava lake. The main island created in the initial stages of the Dec. 2020–May 2021 eruption is in the foreground and continues to rise with the lake surface.

This overview photo of the Halema‘uma‘u lava lake was captured around noon on Friday, October 15, 2021, from the northwest rim of the crater. The western fissure (lower right) continues to erupt lava into the west side of the lava lake (right). The east side of the lake (left) is mostly stagnated and solidified on the surface.

A close-up photo of the vent in the western wall of Halema‘uma‘u, taken during the ongoing eruption at Kīlauea summit. The top of the 5–6 m (16–20 ft) tall lava fountain could be seen from the west crater rim on October 14, at 2:05 p.m. The lava fountains continue to build up a spatter cone around the vent.

A view of the western portion of the lava lake within Halema‘uma‘u, at the summit of Kīlauea. This photo, taken from the west crater rim, shows the active west vent (lower right), the main island (upper left), and the old west vent from the Dec. 2020–May 2021 eruption (lower left).

A view of the fountaining at the west vent in Halema‘uma‘u crater, at the summit of Kīlauea. The photo was taken from the west rim, looking down upon the vent. Low fountaining and roiling within the cone supplied lava to the lake via a narrow spillway. Lava spreading out into the lake develops a zig-zag pattern in the surface crust. USGS photo by M.

A wide view of the ongoing eruption at Kīlauea summit, from the south rim of Halema‘uma‘u. A vent on the western crater wall (left) continues to supply lava to the active west half of the lava lake.

Associated with an increase in fountaining activity at the main western vent in Halema‘uma‘u, a short-lived vent opened just to the north (right). Activity at this vent lasted about 10 hours with low-level fountaining about 3 meters (10 ft) high.

Lava fountains from the western vent within Halema‘uma‘u continue to supply lava into the lava lake through a short spillway. Consistent fountain heights of 10–15 meters (30–50 ft) were interrupted by frequent larger busts of spatter exceeding the height of the cone (30 m or 100 ft). USGS photo taken by B. Carr on October 12, 2021.

VMAP Vog Dashboard: public forecast for October 11, 2021. Colors denote probability of exceeding ‘Moderate’ sulfur dioxide air quality threshold. Source: http://weather.hawaii.edu/vmap/new/

This zoomed-in view of the western fissure within Halema‘uma‘u, at the summit of Kīlauea, was captured on October 11, 2021, through the lens of a laser rangefinder. A prominent horseshoe-shaped spatter cone, measured to be standing 28 m (92 ft) above the adjacent lava lake, surrounds a roiling lava pond which also hosts taller fountains at times.

This zoomed-in view of the northwest side of the main island within the Halema‘uma‘u lava lake shows a "rootless lava flow" (silver) that formed in the early stages of the eruption on September 29, 2021.

Fountaining at the western vent in Halema‘uma‘u crater, at Kīlauea volcano's summit, was approximately 15 meters (50 feet) high on the evening of October 10, 2021. Spatter from the fountaining would occasionally land on the wall of the vent cone and cool (visible on the right).

Lava fountaining activity continues from the western vent in Halema‘uma‘u, within Kīlauea summit caldera, viewed at dusk on October 10, 2021, from the west rim of the crater. Only the western half of the lake surface is active; the eastern half is covered by a cooling, solidified crust. USGS image by B. Carr.

HVO scientists captured this zoomed-in photo of the western fissure within Halema‘uma‘u through the lens of a laser rangefinder on October 9, 2021. The fissure has formed a horseshoe-shaped spatter cone around its source, with an opening on the east (right) side allowing lava to flow into the active lava lake.

In this overflight photo of the Halema‘uma‘u lava lake, captured on October 8, 2021 and looking from the northeast, two western fissures are visible: one inactive from the December 2020–May 2021 Kīlauea summit eruption (center), and another actively feeding lava into the lake at this time (upper-right).

On the morning of October 8, 2021, HVO scientists completed a routine helicopter overflight of the ongoing eruption within Halema‘uma‘u at the summit of Kīlauea.