Volcano Hazards Program Office

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Aerial photograph of the lava lake within Halema'uma'u crater, with a gas plume being emitted from the erupting west vent
November 16, 2021

Kīlauea summit eruption in Halema'uma'u

The ongoing eruption at Kīlauea summit continues to fill Halemaʻumaʻu crater with lava. A gas plume rises from the active vent on the west (left) side of the crater as lava flows from the vent into the rising lava lake (black surface). An overflow onto the lowest visible down-dropped block on the east (right) of the lava lake occurred on November 15. Above the block with

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Regional map of southeastern Idaho showing Stanley earthquakes
November 16, 2021

Regional map of southeastern Idaho showing Stanley earthquakes

Regional map of southeastern Idaho showing the relative location of Yellowstone National Park and the Stanley earthquake aftershocks. Yellowstone National Park (outlined in yellow) is at least 275 km away from the 2020 Mw6.5 Stanley earthquake. Several active faults (in red) are located between the Stanley earthquake and Yellowstone Caldera.

Color photograph of lava lake
November 16, 2021

Halema‘uma‘u Overflight November 16

HVO geologists observed ongoing eruptive activity with Halema‘uma‘u crater during a helicopter overflight of the Kīlauea summit on the morning of November 16, 2021. Lava continues to erupt from a vent on the west side (far side in this photo) of Halema‘uma‘u. Low winds allowed the plume to rise vertically above the crater. The lava lake surface is now level with the lowest

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Cumulative number of aftershocks greater than magnitude 2.5 following the 2020 magnitude 6.5 Stanley earthquake
November 16, 2021

Cumulative aftershocks >M2.5 following the Mar 30, 2020, Stanley, EQ

Cumulative number of aftershocks greater than magnitude 2.5 following the March 30, 2020, magnitude-6.5 Stanley earthquake in central Idaho. The black line shows the observed aftershocks, the red line shows the predicted number of aftershocks. Aftershocks are a normal and expected phenomenon following strong tectonic earthquakes.

November 16, 2021

Lava flow onto lowest exposed Kīlauea summit down-dropped block

The elevation of the surface of the lava lake within Halema‘uma‘u crater has now risen slightly above the level of the lowest down-dropped block from the 2018 collapse of Kīlauea summit. Overnight on November 15, 2021, a lava break-out from the edge of the lake allowed lava to flow onto the surface on the block. HVO geologists observed this new flow during a helicopter

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Color photograph of steaming area
November 16, 2021

Kīlauea middle East Rift Zone steaming

During a helicopter overflight on November 16, 2021, HVO scientists monitored a thermal steaming area near Heiheiahulu, on Kīlauea's middle East Rift Zone. The expanse of this thermal area has not changed or expanded significantly since the previous overflight of the area in March 2021. This view, from the north and looking south, shows two dark areas where vegetation has

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November 12, 2021

Overflow of a perched levee—Halema‘uma‘u, Kīlauea summit

Lava continues to erupt from the west vent in Halema‘uma‘u, and supply the lava lake through a spillway in the spatter cone. On November 12, a small overflow of the perched lava lake levee was visible from the western crater rim. Overflows are an important process for building up perched levees, as they help add height and stability. The height of the levee in this video

Color photo of a volcanic vent erupting red lava into a lake, and emitting a thick white gas plume
November 12, 2021

West vent cone and small overflow — Kīlauea summit

View of the west vent cone and outlet channel in Halema‘uma‘u crater, at the summit of Kīlauea. On the lower left is a small channelized overflow, where lava breached a levee and started flowing into a lower area to the west. Photo taken at 1:40 p.m. HST on Nov. 12, 2021, from the western rim. USGS photo by J.M. Chang.

Color photo of a small red lava channel cascading over a levee into a low-lying area
November 12, 2021

Overflow of Halema‘uma‘u lava lake levee—Kīlauea summit

A telephoto view of a small overflow to the north of the west vent in Halema‘uma‘u crater, at the summit of Kīlauea. The flow direction is from east (top) to west (bottom) in the photo, and the height of the overflow is approximately 1 meter (3.3 feet). Black chunks of cooled crust can be seen entrained in the flow. Photo taken at 1:18 p.m. HST on Nov. 12, 2021, from the

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A telephoto color image of a spatter cone with lava erupting from a small opening in the top
November 12, 2021

Telephoto view of west vent—Kīlauea summit

A telephoto view of spatter erupting from the west vent in Halema‘uma‘u crater, at the summit of Kīlauea. Photo taken at 2:42 p.m. HST on Nov. 12, 2021, from the western rim. USGS photo by J.M. Chang.

Color map of lava lake at volcano summit
November 11, 2021

November 11, 2021—Kīlauea summit eruption reference map

This reference map depicts the ongoing Kīlauea summit eruption on November 11, 2021. One eruptive vent is active within Halema‘uma‘u at this time, along the western edge of the rising lava lake. Similar to the last eruption—from December 2020 until May 2021—the eastern end of the lava lake has stagnated and solidified, and sits several yards (meters) lower than the

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Lava lake with dark solidified lava crust covering most of the surface and an active vent on the far side
November 10, 2021

Halema‘uma‘u lava lake—November 9, 2021

A view of the Halema‘uma‘u lava lake taken during a helicopter overflight on the morning of November 9, 2021. Lava is visible in the spillway and in the west vent on the far side of the lava lake (center). There are also several small perched overflows in the northwest quadrant of the lake (near center between the vent and main island). USGS photo by L. Gallant.