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Color photograph of volcanic vent
January 5, 2021

Halema‘uma‘u west vent activity for the evening of 5 January, 2021

Telephoto view of the lava flow and “dome fountain” activity at the west vent of the ongoing eruption in Halema‘uma‘u, Kīlauea Volcano summit, at 5:45 p.m. HST on 5 January, 2021. USGS photo by K. Lynn. 

January 5, 2021

Kīlauea — Halema‘uma‘u West Vent Activity (Jan 5, 2021)

The activity at the Halema‘uma‘u west vent area on January 5, 2021, was dynamic. In the foreground, a “dome fountain” upwells from beneath the lake surface, pulsing with a bubble-like geometry. Just behind it, an effusive lava flow emerges from the base of the vent structure. A mid-elevation vent is also active, emitting another effusive lava flow. Finally, the higher

Color photograph of volcanic vent spattering
January 3, 2021

Kīlauea summit eruption - Jan. 3, 2020, at 1:30 a.m. HST

Early this morning, the west vents in Halema‘uma‘u spattered from two places at the top of a small cone plastered on the northwest wall. This process can be seen in Kīlauea Volcano's summit F1 thermal webcam view of the lava lake. USGS photo by H.

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Color photograph of volcanic vent spattering and lava lake
January 3, 2021

Kīlauea summit eruption - Jan. 3, 2020, at 1:30 a.m. HST

At Halema‘uma‘u, the west vents (visible in the foreground of this photo as two glowing holes on a cone-shaped feature) erupt occaisional spatter. Lava is also emerging in a small dome fountain above the lake crust in front of the west vents, probably from a submerged portion of the vent (visible in the background of this photo as a bright spot with lava crust boundaries

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January 3, 2021

Dome Fountain Formed at Lava Lake Inlet, Halema'uma'u (Jan 2-3, 2020)

Lava forms a “dome fountain” at the inlet to the lava lake in Halema'uma'u crater January 2-3, 2021. Lava from the western vent cascades beneath roofed vertical channels to enter the lava lake at an inlet that has become partially submerged. The result is a rolling upwelling of lava near the inlet called a “dome fountain.”

Dome fountains have been observed during

Color photographs of lava lake
January 3, 2021

Channel crusting over at the base Halema'uma'u's west vent

The west vent in Halema‘uma‘u crater continues to erupt at Kīlauea’s summit. These telephoto images from December 29 (left) and December 30 (right) compare the lava lake surface below the west vent. The west vent is supplying lava to the lake through a crusted over channel, which was starting to form by December 30. USGS photos by H. Dietterich.

January 2, 2021

Lava Entering Lava Lake in Halem'uma'u (Dec 31, 2020 - Jan 2, 2021)

These videos show an increase in the surface activity where lava is entering the lake. 

  • Clip 1: Lava from Halema‘uma‘u west vents entering the lava lake on December 31, 2020, at approximately 10 a.m. HST.
  • Clip 2: Lava from Halema‘uma‘u west vents entering the lava lake on January 2, 2021, at approximately 11 p.m. HST.

Kīlauea Volcano, U.S

Color photograph of lava lake and volcanic vent
January 2, 2021

Kīlauea summit eruption - Jan. 2, 2021, at 7 a.m. HST

View of the west vent area and lava lake in Halema‘uma‘u, at Kīlauea Volcano's summit. USGS photo by K. Lynn.

Color photograph of lava lake and volcanic vent
January 2, 2021

Kīlauea summit eruption - Jan. 2, 2021, at 7:30 a.m. HST

Telephoto photograph of the west vent area and lava lake in Halema‘uma‘u, at Kīlauea Volcano's summit. USGS photo by K. Lynn.

Eruptions of Steamboat Geyser over time
January 2, 2021

Eruptions of Steamboat Geyser over time

Eruptions of Steamboat Geyser over time.  (A) Cumulative eruptions of Steamboat Geyser since 1960. Each dot represents an eruption. (B) Comparative plot of the cumulative eruptions in each active phase (1960s, 1980s, and 2018-). Data from GeyserTimes. Note that some eruptions in the 1960s are missing from this

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Steamboat Geyser eruption signals
January 2, 2021

Steamboat Geyser eruption signals

Steamboat Geyser eruption signals recorded by nearby monitoring instruments. The vertical pink lines mark when the signal first appears. (A) Seismic station YNM records a signal which slowly tapers as the eruption decreases in intensity. Spikes seen before the eruption are mostly due to human activity. (B) Moments before a major eruption begins, there is often a surge of

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January 1, 2021

Eruption and Lava Lake in Halema'uma'u (Jan 1, 2021)

Videos of the eruption and lava lake in Halema‘uma‘u on January 1, 2021.

  • Clip 1: Halema‘uma‘u west vents and lava entering the lava lake at approximately 5:30 p.m. HST.
  • Clip 2: Telephoto view of lava from Halema‘uma‘u west vents entering the lava lake at approximately 5 p.m. HST.
  • Clip 3: The lava lake overflows onto a lower edge along the