Volcano Hazards Program Office

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Color photograph of lava flow
October 11, 2021

October 11, 2021 — Kīlauea

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. A rootless lava flow is one that has no physical linkage with its source eruptive vent, because the flow is fed by molten spatter falling onto a solidified surface. In

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Color photograph of volcanic vent
October 10, 2021

October 10, 2021 — Kīlauea, lava fountaining in Halema‘uma‘u

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 exited the pond within the cone and entered the lake through a gap on the eastern side of

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Color photograph of lava lake
October 10, 2021

October 10, 2021 — Kīlauea, Halema‘uma‘u lava lake at dusk

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.

October 10, 2021

October 10, 2021—Kīlauea, fountaining at west vent of Halema'uma'u

Kīlauea summit eruption lava fountain height in Halema‘uma‘u crater on October 10, 2021 was highly variable. A persistent low fountain a few meters (yards) tall was frequently interrupted by larger series of bursts throwing lava more than 15 meters (50 feet) into the air and onto the interior walls of the vent cone. 

Color photograph of volcanic vent
October 9, 2021

October 9, 2021 — Kīlauea, summit eruptive vent

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. The spatter cone was measured to be standing 30 m (98 ft) tall

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Color map showing lava lake rise
October 8, 2021

October 8, 2021 — Kīlauea, Halema‘uma‘u Lava Lake Growth

The eruption within Halema‘uma‘u crater, at Kīlauea's summit, continues to feed a growing lava lake. Photos taken during helicopter overflights of the crater allow HVO scientists to create elevation maps of the rising lake’s surface. The surface area of the Halema‘uma‘u lava lake is now 553000 square meters, or 157 acres. At its widest point, the lake is a kilometer wide (

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Color map showing lava lake rise
October 8, 2021

October 8, 2021 — Kīlauea, Halema‘uma‘u Lava Lake Growth

The surface area of the Halema‘uma‘u lava lake at the summit of Kīlauea is now 553,000 square meters, or 157 acres. At its widest point, the lake is a kilometer wide (0.62 mile). The colored lines show the perimeter of the lake prior to the recent eruption (pink, data from June 8), one day into the eruption (orange, September 30), and over a week into the eruption (red,

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Color graph depicting lava lake rise
October 8, 2021

October 8, 2021 — Kīlauea, Halema‘uma‘u Lava Lake Depth

The elevation profiles running East-West across Halema‘uma‘u crater show the rise of the lava lake surface during the ongoing eruption at the summit of Kīlauea. The lake lake is now about 260 m (850 feet) deep, and has risen nearly 30 m (98 feet) above the previous lake surface since the eruption began on September 29. More 15 million cubic meters of lava (4.2 billion

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Color photograph of volcanic vent and bird
October 8, 2021

October 8, 2021 — Kīlauea, active west vent in Halema‘uma‘u crater

A Koa‘e Kea (white-tailed tropicbird) flies above the erupting west vent within Halema‘uma‘u crater, at the summit of Kīlauea. Photo taken from the south rim of Halema‘uma‘u at 10:41 a.m. HST on Oct. 8, 2021. USGS photo by J.M. Chang. 

Color photograph of scientist monitoring eruption
October 8, 2021

October 8, 2021 — Kīlauea summit eruption monitoring

USGS scientist takes video of the erupting west vent within Halema‘uma‘u crater, at the summit of Kīlauea. Photo taken from the northwest rim of Halema‘uma‘u at 12:27 p.m. HST on Oct. 8, 2021. USGS photo by J.M. Chang.

Color photograph of volcanic vent
October 8, 2021

October 8, 2021 — Kīlauea summit eruption

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). The older fissure is is being partially overlapped by short lava flows

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Color photograph of active lava lake
October 8, 2021

October 8, 2021 — Kīlauea summit eruption

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. This overview photo of the lava lake was captured from the northeast, with the erupting western fissure in the right of the frame, and a number of islands from the December 2020–May 2021 lava lake visible in the

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