After a recent eruptive pause, renewed lava effusion from the vent has reactivated the western end of the lava lake within essentially the same footprint as before the pause. One eruptive vent is active within Halema‘uma‘u at this time, along the western edge of the lava lake. This reference map depicts the ongoing Kīlauea summit eruption on December 9, 2021. See the Kīlauea daily updates for measurements of the differences in elevation of different portions of the lake.
Note that the eastern portion of the lake is lower than the western portion, where the active vent is located and where the laser rangefinder is pointed. Lava will overflow Halema‘uma‘u, onto the lowest down-dropped block when the eastern portion reaches a depth of 267 meters/876 ft (equal to an elevation of 790 meters/2592 ft above sea level). The ongoing eruption is adding to that lava depth. Post-eruption analyses indicate that the December 2020–May 2021 lava lake filled the base of Halema‘uma‘u to a depth of 223 meters/732 ft (equal to an elevation of approximately 741 meters/2431 ft above sea level). Variations in plotted depth can occur due to laser rangefinder returns on gas rather than the lava surface.For reference, the base of Halema‘uma‘u after the 2018 collapse event is “zero” on this plot (equal to an elevation of 518 meters/1699 ft above sea level). The raw data has been edited for this graph, with a running mean average filter of 3600 seconds. The fixed instrument continuously measures the distance to a location on the western lava lake surface, and telemeters data to HVO in real time. Graph showing the depth of lava (in meters) in Halema‘uma‘u crater at Kīlauea volcano's summit, from September 2021 and on. On January 8, 2021, a novel laser rangefinder was stationed at Kīlauea volcano's summit. This instrument autonomously measures lava lake elevation in real time, using the light-reflecting properties of the lava surface. Monitoring Lava Lake DepthĪ continuous laser rangefinder was installed on the western rim of Halemaʻumaʻu crater within a closed area of Hawaiʻi Volcanoes National Park, under a National Park Service permit, on January 8, 2021. Near-real-time images captured by the KWcam are available here: /volcanoes/kilauea/kwcam-live-panorama-halema-uma-u. HST and shows the continuing eruption and growing lava lake. The first image was taken on September 29, 2021, just before the eruption began the second image was taken the morning of October 4, 2021, just before 6 a.m. These fissures opened east of the large island near the center of the lava lake that was active within Halemaʻumaʻu crater from December 2020 until May 2021. At approximately 3:21 pm, HST, new fissures opened at the base of Halemaʻumaʻu crater.
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HST - eruption begins as a series of fissure vents to the east of the large island that formed in the December 2020-May 2021 lava lake. This activity is ongoing, and Kīlauea daily updates are posted here. a series of vents opened in the floor and walls of Halemaʻumaʻu crater, generating a lava lake. However, no eruption occurred, and the shallow Halemaʻumaʻu magma reservoir continued to measure inflation. On September 29, 2021, earthquake activity increased abruptly beneath Halemaʻumaʻu around 2 p.m. In August 2021, increased earthquake activity and patterns of ground deformation indicated that an intrusion was occurring and magma was moving into an area south of Kīlauea caldera.
This is an exciting time on Kīlauea Volcano because lava has returned to the summit following the 2018 summit collapse. After the December 2020-May 2021 Halemaʻumaʻu eruption ended, Kīlauea summit region continued to slowly inflate. Photo taken from the south rim of Halema‘uma‘u at 10:41 a.m.
A Koa‘e Kea (white-tailed tropicbird) flies above the erupting west vent within Halema‘uma‘u crater, at the summit of Kīlauea.