Volcano Hazards Program Office

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Color photograph of volcanic vent
October 5, 2021

Western fissure, Halema‘uma‘u, Kīlauea - October 5, 2021

Lava fountains from the western fissure vent in the Halema‘uma‘u crater wall, at Kīlauea's summit during the ongoing eruption. USGS video by N. Deligne.

October 5, 2021

Lava fountains - western fissure, Halema‘uma‘u, Kīlauea - Oct 5, 2021

Lava fountains from the western fissure vent in the Halema‘uma‘u crater wall, at Kīlauea's summit during the ongoing eruption. The shaking at the end of the video is due to strong wind gusts moving the tripod. This video clip was recorded on October 5, 2021, from the southern crater rim. 

Color map showing lava lake eruption features
October 5, 2021

October 5, 2021—Kīlauea summit eruption reference map

This reference map depicts the ongoing Kīlauea summit eruption on October 5, 2021. Two eruptive vents are active at this time: one along the western edge of the rising lava lake, and one within the south-central portion of the lake. Several islands from the December 2020–May 2021 eruption dot the lake surface, some of which were initially drowned but later floated back to

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Color photograph of scientist monitoring eruption
October 5, 2021

HVO geologist observing lava lake in Halema‘uma‘u - October 5, 2021

A Hawaiian Volcano Observatory (HVO) geologist notes observations of the active lava lake in Halema‘uma‘u crater, at the summit of Kīlauea. HVO scientists continue to monitor the ongoing eruption from an area within Hawai‘i Volcanoes National Park that remains closed to the public due to hazardous conditions. USGS photo taken by N. Deligne on October 5, 2021.

Color photograph of active lava lake
October 5, 2021

Kīlauea summit eruption in Halema‘uma‘u crater - October 5, 2021

A view of the lava lake in Halema‘uma‘u crater, at the summit of Kīlauea, taken from the western crater rim looking east. The western vent (lower right) remains the dominant source of fountaining. One fountain remains active in the south portion of the lake (center right). The silver-grey lava comes from the western vent, and the dark black lava comes from the south

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Color photograph of vent and lava lake
October 5, 2021

Close-up view of west vent, Halema‘uma‘u, Kīlauea - October 5, 2021

Photo of fountaining from the western vent in Halema‘uma‘u crater, at the summit of Kīlauea. Spatter from the fountain continues to build up a horseshoe-shaped cone around the vent, with lava flowing into the lake at the base. This photo was taken from the western crater rim on October 5, 2021. USGS photo by N. Deligne.

A wide view of the lava lake in Halema‘uma‘u crater, at the summit of Kīlauea, taken from the western crater rim
October 4, 2021

Kīlauea summit eruption in Halemaʻumaʻu crater - October 4, 2021

A wide view of the lava lake in Halema‘uma‘u crater, at the summit of Kīlauea, taken from the western crater rim. The western vent (lower right) remains the dominant source of fountaining, while low lava fountains are still emerging through the southern portion of the lava lake (center right). USGS photo by M. Patrick taken on October 4, 2021.

A telephoto image of fountaining from the western vent in Halema‘uma‘u crater, at the summit of Kīlauea
October 4, 2021

Kīlauea summit eruption in Halemaʻumaʻu crater - October 4, 2021

A telephoto image of fountaining from the western vent in Halema‘uma‘u crater, at the summit of Kīlauea. Spatter from the fountain continues to build up a cone around the vent, which is almost entirely out of view from this angle. This photo was taken from the western crater rim on October 4, 2021. USGS photo by M. Patrick.

A close-up view of the western fissure and lava lake in Halema‘uma‘u crater, at the summit of Kīlauea
October 4, 2021

Kīlauea summit eruption in Halemaʻumaʻu crater - October 4, 2021

A close-up view of the western fissure and lava lake in Halema‘uma‘u crater, at the summit of Kīlauea. The lava lake crust develops a complex pattern as it flows away from its source at the western vent (bottom right). USGS photo by M. Patrick taken on October 4, 2021.

A geologist uses a laser rangefinder to measure the elevation of the active lava lake in Halema‘uma‘u crater
October 4, 2021

Kīlauea summit eruption in Halemaʻumaʻu crater - October 4, 2021

A Hawaiian Volcano Observatory (HVO) geologist uses a laser rangefinder to measure the elevation of the active lava lake in Halema‘uma‘u crater, at the summit of Kīlauea. HVO scientists continue to monitor the ongoing eruption from an area within Hawai‘i Volcanoes National Park that remains closed to the public due to safety concerns. USGS photo taken by M. Patrick on

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A telephoto view of fountaining at the western vent in Halema‘uma‘u crater
October 4, 2021

Kīlauea summit eruption in Halemaʻumaʻu crater - October 4, 2021

A telephoto view of fountaining at the western vent in Halema‘uma‘u crater, at the summit of Kīlauea. Spatter from the fountain has built a horseshoe-shaped cone around the vent in the western crater wall. Molten spatter accumulating on the cone forms a tiny stream of lava down the north side (bottom center). This photo was taken on October 4, 2021, from the northwest

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An overflow of lava from the active lava lake poured into and along the levee
October 4, 2021

Kīlauea summit eruption in Halemaʻumaʻu crater - October 4, 2021

An overflow of lava from the active lake (left) poured onto and along the levee (right) on the eastern end of the lava lake in Halema‘uma‘u crater, at the summit of Kīlauea. USGS photo by M. Patrick taken on October 4, 2021.