Unified Interior Regions

Hawaii

The Pacific Region has nine USGS Science Centers in California, Nevada, and Hawaii. The Regional Office, headquartered in Sacramento, provides Center oversight and support, facilitates internal and external collaborations, and works to further USGS strategic science directions.

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Kīlauea East Rift Zone Eruption Map: December 13, 2011...
December 13, 2011

Map showing the extent of lava flows erupted during Kīlauea's ongoing east rift zone eruption and labeled with the years in which they were active.

Pu‘u ‘Ō‘ō and Episode 61 flow field: December 2, 2011...
December 2, 2011

Map showing Pu‘u ‘Ō‘ō and the extent of nearby lava flows.

Kīlauea East Rift Zone Eruption Map: December 2, 2011...
December 2, 2011

Map showing the extent of lava flows erupted during Kīlauea's ongoing east rift zone eruption and labeled with the years in which they were active.

Kīlauea East Rift Zone Eruption Map: November 21, 2011...
November 21, 2011

Map showing the extent of lava flows erupted during Kīlauea's ongoing east rift zone eruption and labeled with the years in which they were active.

Pu‘u ‘Ō‘ō and Episode 61 flow field: November 21, 2011...
November 21, 2011

Map showing Pu‘u ‘Ō‘ō and the extent of nearby lava flows.

Kīlauea East Rift Zone Eruption Map: November 10, 2011...
November 10, 2011

Map showing the extent of lava flows erupted during Kīlauea's ongoing east rift zone eruption and labeled with the years in which they were active.

Pu‘u ‘Ō‘ō and Episode 61 flow field: November 10, 2011...
November 10, 2011

Map showing Pu‘u ‘Ō‘ō and the extent of nearby lava flows.

Pu‘u ‘Ō‘ō and Episode 61 flow field: November 3, 2011...
November 3, 2011

Map showing Pu‘u ‘Ō‘ō and the extent of nearby lava flows.

Kīlauea East Rift Zone Eruption Map: November 3, 2011...
November 3, 2011

Lava flows erupted during Kīlauea's ongoing east rift zone eruption and labeled with the years in which they were active.

Kīlauea East Rift Zone Eruption Map: October 25, 2011...
October 25, 2011

Map showing the extent of lava flows erupted during Kīlauea's ongoing east rift zone eruption and labeled with the years in which they were active.

Pu‘u ‘Ō‘ō: October 25, 2011...
October 25, 2011

Map showing Pu‘u ‘Ō‘ō and the extent of nearby lava flows.

Pu‘u ‘Ō‘ō...
September 22, 2011

Map showing the current configuration of Pu‘u ‘Ō‘ō.

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View from the south rim of Halema‘uma‘u shows the perched lava lake
April 13, 2021

Halema‘uma‘u lava lake, Kīlauea summit eruption—April 13, 2021

This view from the south rim of Halema‘uma‘u shows the perched lava lake, supplied by lava from the western fissure (upper right portion of photo). The levee surrounding the active lava lake is up to about 5 m (16 ft) high. USGS photo by M. Patrick on April 13, 2021.

A close up view of the inlet at the western margin of the lava lake in Halema‘uma‘u Crater
April 13, 2021

Halema‘uma‘u lava lake, Kīlauea summit eruption—April 13, 2021

A close up view of the inlet at the western margin of the lava lake in Halema‘uma‘u Crater, at the summit of Kīlauea. The lava stream was covered in a thin, flexible crust and was moving at a very slow velocity. USGS photo taken by M. Patrick on April 13, 2021.

Lava continues to erupt from the west vent in Halema‘uma‘u crater at Kīlauea Volcano's summit
April 9, 2021

Halema‘uma‘u eruptive activity on April 9, 2021

Lava continues to erupt from the west vent in Halema‘uma‘u crater at Kīlauea Volcano's summit. This photo of the vent and active western portion of the lava lake was taken around 3:00 p.m. HST from the south rim of Halema‘uma‘u crater. USGS photo taken by K. Lynn on April 9, 2021.

Lava erupting from the west vent in Halema‘uma‘u crater emerged from a second source closer to the vents base
April 9, 2021

Halema‘uma‘u eruptive activity on April 9, 2021

On Friday, lava erupting from the west vent in Halema‘uma‘u crater emerged from a source closer to the vents base (center), a few feet away from the submerged effusive inlet that has been feeding the lava lake for several weeks (lower right). This photo was taken from the south rim of Halema‘uma‘u crater, in an area of Hawai‘i Volcanoes National Park that remains closed to

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On Friday afternoon, April 9, lava entered the Halema‘uma‘u lava lake from two sources near the base of the west vent
April 9, 2021

Halema‘uma‘u eruptive activity on April 9, 2021

On Friday afternoon, April 9, lava entered the Halema‘uma‘u lava lake from two sources near the base of the west vent (degassing on left side of the image). This photo was taken around 4:00 p.m. HST from the western rim of Halema‘uma‘u crater, at Kīlauea summit. The lava source closer to the west vent emerged approximately one hour before this photo was taken. USGS Photo

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Color photograph of lava lake and crater wall
April 8, 2021

April 8, 2021 — Kīlauea

The crusted-over southern shoreline of the lava lake in Halema‘uma‘u at Kīlauea's summit has accumulated talus (rubble) blocks on the surface since it solidified in February. On April 8, 2021, HVO field geologists noted steaming east of the talus (above the rubble in the photo) that was producing hazy viewing conditions. USGS photo by C. Parcheta.

View of the Kīlauea summit lava lake from the west rim of Halema‘uma‘u crater on April 7, 2021
April 7, 2021

Kīlauea summit lava lake on April 7, 2021

View of the Kīlauea summit lava lake from the west rim of Halema‘uma‘u crater on April 7, 2021. Lava continues to erupt from the west vent, where a diffuse gas plume is visible in the lower left. The active west part of the lava lake (lower center) is a lighter gray color, compared to the darker appearance of the solidified surface crust to the east. This photo was taken

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A zoomed in view of the active lava lake and western vent, taken from the west rim of Halema‘uma‘u crater at Kīlauea summit
April 7, 2021

Active lava lake within Halema‘uma‘u crater on April 7, 2021

A zoomed in view of the active lava lake and western vent, taken from the west rim of Halema‘uma‘u crater at Kīlauea summit. The active lava lake remains perched a few meters (yards) higher than the surrounding solidified lava crust. A few small rafted islands (darker in color) are visible within the active western lava lake. The bluish-white gas plume marks the location

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Color photograph of lava lake
April 5, 2021

April 5, 2021 — Kīlauea

The lava lake in Halema‘uma‘u crater, at the summit of Kīlauea, remains active, as seen in this view looking north. Active surface lava is limited to the western (left) portion of the lake between the main island and the western fissure complex. The blueish tinge to the plume from the western fissure complex (left) is due to sulfur dioxide (SO2). USGS photo

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Color map of lava lake at volcano summit
April 5, 2021

April 5, 2021—Kīlauea summit eruption contour map

This map of Halema‘uma‘u at the summit of Kīlauea shows 20 m (66 ft) contour lines (dark gray) that mark locations of equal elevation above sea level (asl). The map shows that the lava lake has filled 225 m (738 ft) of the crater, to an elevation of 742 m (2434 ft) asl since the eruption began on December 20, 2020. Contour lines highlighted in green, purple, and blue mark

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Color photograph of volcanic vent
April 2, 2021

Vent in Halema‘uma‘u at Kīlauea's summit - April 2, 2021

Telephoto image of the western cone complex of the current eruption in Halema‘uma‘u at Kīlauea's summit. In the center, a horseshoe-shaped spatter rampart is partially filled in by a more recent spatter cone. The cone has an incandescent opening that spatter is occasionally erupted from. Behind the main cone (to the right in the image) is another spatter cone, darker in

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Color photograph of lava lake
April 2, 2021

Kīlauea summit eruption — April 2, 2021

A wide view of the eruption within Halema‘uma‘u crater at the summit of Kīlauea. The western vent and perched lava lake remain active in the western portion of the crater (left). Sulfur dioxide emission rates remain elevated, with the most recent measurement being 1,200 tonnes per day on April 1. USGS photo taken by L. DeSmither on April 2, 2021.

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fissures were characterized by low eruption rates
April 25, 2019

May 3, 2019, marks the one-year anniversary of the start of Kīlauea Volcano's 2018 lower East Rift Zone eruption. Over the past year, USGS Hawaiian Volcano Observatory (HVO) geologists and collaborators have been closely studying the vast amount of data collected during the summer eruption. Now is a good time to explore what's been learned, and what's still unfolding.

progression of the magmatic intrusion from Kīlauea
April 18, 2019

When a major geologic event occurs, scientists who study such events and the people who are directly or indirectly impacted by it seek to understand its cause. Often, a first step toward that understanding is to rule out what did not cause the event. 

USGS
April 16, 2019

Details about two upcoming talks presented by HVO scientists on April 23 and May 2 are posted.
 

This is a photo of one of the large fissures in the Southwest Rift Zone.
April 13, 2019

Magnitude-5.3 earthquake east of Kalaoa, Island of Hawai‘i

HVO scientists measure a GPS instrument
April 12, 2019

HVO scientists inspect monitoring instruments on Mauna Loa. 

high-precision GPS unit
April 11, 2019

In February 2019, the USGS Hawaiian Volcano Observatory (HVO) released a preliminary map of lava flow thicknesses for Kīlauea Volcano's 2018 lower East Rift Zone eruption.

USGS
April 10, 2019

Digital database of the geologic map of the middle east rift geothermal subzone, Kīlauea Volcano, Hawaiʻi: USGS Data Series 1111 

USGS
April 10, 2019

HVO Scientist-in-Charge Tina Neal talked about the status of Kīlauea and Mauna Loa volcanoes.

 small amounts of sulfur dioxide
April 4, 2019

The end of Kīlauea's 2018 eruption this past September was accompanied by an enormous decrease in the amount of sulfur dioxide gas (SO2) emitted from the volcano. This has led to beautifully clear skies gracing the Island of Hawai‘i, particularly noticeable on the west side, where the volcanic pollution known as vog chronically collected in past years.

New outcrops make good geology
March 28, 2019

A good field geologist is an opportunist. Never content with what outcrops are available, she jumps at the chance to see another one, hoping that it will provide a better understanding to some question about what happened in the past.