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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Map of post-1823 lava flows erupted from Mauna Loa (gray) and numbe...
January 1, 2018

Slope map of Mauna Loa, including lava flows erupted since 1823 (gray), showing the approximate number of hours or days it took for a flow to advance from the vent location to the ocean or maximum reach of a flow. 

Color graphic showing the Island of Hawaiʻi and Mauna Loa structural features
January 1, 2018

Island of Hawai‘i map, showing Mauna Loa and the other four volcanoes that make up the island. Mauna Loa structural features include summit caldera, rift zones, radial vents, and historical lava flows.

Map of lava flows that have erupted on Mauna Loa Volcano from 1843-...
January 1, 2018

Map of lava flows that have erupted on Mauna Loa Volcano from 1843-1984.

Earthquakes at Mauna Loa from June 2013 to June 2015. Green circles...
January 1, 2018

Earthquakes at Mauna Loa from June 2013 to June 2015. Green circles are 0-5 km (0-3 mi) deep and similar to ones prior to 1975 and 1984 eruptions, but cluster of 5-10 km (3-6 mi) deep quakes missing.

USGS maps identify lava inundation zones for Mauna Loa...
January 1, 2018

Close up of Sheet 2 of "Lava inundation zone maps for Mauna Loa, Island of Hawai‘i," recently published by the U.S. Geological Survey. Colors depict lava Inundation zones for the Kaumana, Waiākea, and Volcano-Mountain View regions on Mauna Loa. 

New map reveals geologic history of Mauna Loa Volcano's northeast f...
January 1, 2018

"Geologic map of the northeast flank of Mauna Loa volcano, Island of Hawai‘i," published by the U.S. Geological Survey in May 2017, shows the distribution of lava flows and other deposits covering an area from Pu‘u‘Ula‘ula ("Red Hill") on the southwest to Hilo on the northeast.

Tracking the latest moves of Kīlauea and Mauna Loa...
January 1, 2018

Interferometric Synthetic Aperture Radar (InSAR) images of Kīlauea (left) and Mauna Loa (right) spanning the past several years.

Lava Inundation Zones Identified for Mauna Loa...
January 1, 2018

Inundation zones shown on map sheets as numbered colored boxes.

Map of Flow Field...
December 13, 2017

This map shows recent changes to Kīlauea’s East Rift Zone lava flow field. 

Thermal map of flow field...
December 12, 2017

Thermal map over the Episode 61g lava flow. 

Pu‘u ‘Ō‘ō Crater annotated map...
November 29, 2017

This map shows Pu‘u ‘Ō‘ō Crater on Kīlauea Volcano's East Rift Zone on November 22, with labels of the crater's main features.

Thermal map of flow field...
November 22, 2017

Thermal map over the Episode 61g lava flow.

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Close-up view of the now-inactive western fissure within Halema‘uma‘u at the summit of Kīlauea captured on May 27, 2021
May 27, 2021

Close-up view of inactive western fissure in Halema‘uma‘u—May 27, 2021

This close-up view of the now-inactive western fissure within Halema‘uma‘u at the summit of Kīlauea was captured on Thursday, May 27, 2021. HVO scientists did not observe any incandescent lava or other signs of eruptive activity during a one-hour visit to the crater rim. The fissure complex was measured to be about 20 m (66 ft) tall at the time; small rockslides have been

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The now inactive lava lake and west vent from the western rim of Halema‘uma‘u, at Kīlauea summit
May 26, 2021

View of the inactive crusted over lava lake in Halema‘uma‘u

A wide view of the now inactive lava lake and west vent from the western rim of Halema‘uma‘u, at Kīlauea summit. The lava lake is entirely crusted over with no red, glowing lava at the surface. Diffuse volcanic gas plumes are still being emitted from the west vent and northern lake margin. This photo was taken in an area of Hawai‘i Volcanoes National Park that remains

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An overview of the lava lake within Halema‘uma‘u crater, at Kīlauea Volcano’s summit, taken on May 25
May 25, 2021

Kīlauea summit eruption on May 25, 2021

An overview of the lava lake within Halema‘uma‘u crater, at Kīlauea Volcano’s summit, taken on May 25. Kīlauea’s summit collapse in 2018 deepened Halema‘uma‘u crater by over 500 meters (1640 feet). The eruption that began the evening of December 20, 2020, has filled approximately 229 m (751 ft) of the base of Halema‘uma‘u crater, which is more than the height of the Space

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On May 25, HVO field crews did not observe any active surface lava or incandescent areas within Halema‘uma‘u crater
May 25, 2021

Kīlauea summit eruption on May 25, 2021

During an eruption monitoring shift on May 25, HVO field crews did not observe any active surface lava or incandescent areas within Halema‘uma‘u crater, at the summit of Kīlauea. Since the eruption began on December 20, 2020, over 40 million cubic meters (over 10 billion gallons) of lava has been erupted. This volume is approximately 16 times the volume of the Great

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Though no active surface lava was observed within Halema‘uma‘u on May 25, Kīlauea summit continues to emit volcanic gases
May 25, 2021

Kīlauea summit eruption on May 25, 2021

Though no active surface lava was observed within Halema‘uma‘u on May 25, Kīlauea summit continues to emit volcanic gases. The most recent sulfur dioxide emission rate, measured on May 23, remains slightly elevated at 100 tonnes per day. This photo, taken from the south rim of Halema‘uma‘u, shows an area near the north wall of Halema‘uma‘u crater that has been visibly

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On the evening of May 24, no active surface lava was observed within Halema‘uma‘u crater.
May 24, 2021

Halema‘uma‘u lava lake, Kīlauea summit eruption—May 24, 2021

On the evening of May 24, no active surface lava was observed within Halema‘uma‘u crater, at the summit of Kīlauea Volcano. Small spots of incandescent lava were visible beneath cracks in the lake surface crust (center) and at the west vent (left). This photo was taken from the western rim of Halema‘uma‘u, in an area of Hawai‘i Volcanoes National Park that remains closed

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A zoomed-in view of the western vent within Halema‘uma‘u, at the summit of Kīlauea
May 24, 2021

Halema‘uma‘u lava lake, Kīlauea summit eruption—May 24, 2021

A zoomed-in view of the western vent within Halema‘uma‘u, at the summit of Kīlauea, with a weak glow visible at dusk on Monday, May 24. USGS photo taken by B. Carr from the western rim of Halema‘uma‘u.

A zoomed-in view of the western lava lake in Halema‘uma‘u
May 24, 2021

Halema‘uma‘u lava lake, Kīlauea summit eruption—May 24, 2021

A zoomed-in view of the western lava lake in Halema‘uma‘u, at Kīlauea summit, where two locations of faint incandescence are visible beneath the surface crust (upper right). Eruptive activity has decreased significantly in the past few weeks and the once active lava surface has cooled and crusted over. USGS photo taken by B. Carr at dusk on May 24, 2021.

Color images of lava lake surface
May 20, 2021

Active surface lava limited to a small pond in Halema‘uma‘u

Active surface lava in Halema‘uma‘u, at the summit of Kīlauea, is now limited to a small lava pond near the western fissure. Normally the lava pond is covered in a stationary crust, as shown by the image on the left. Occasionally, the pond abruptly resurfaces with fluid lava, with foundering of crustal plates and abundant bubbling, shown by the image on the right. The

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Map showing earthquake activity
May 20, 2021

Map showing Island of Hawai‘i earthquake activity over the past week

Map and plot showing earthquakes at 20-40 km (12-25 miles) depth beneath the Island of Hawai‘i over the past week. Most of the earthquakes at this depth were clustered beneath the southern edge of the island near the town of Pāhala (blue dots).  USGS graphic.

Color photograph of lava lake
May 20, 2021

May 20, 2021 — Kīlauea

No active surface lava was visible within Halema‘uma‘u, at the summit of Kīlauea, during a field visit yesterday morning. F1cam thermal images from yesterday afternoon show hot surface crust, but no active lava. F1cam thermal images from the morning of May 21 showed at least one small resurfacing event. This image was taken within an area of Hawai‘i Volcanoes National Park

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Color photograph of lava lake and vent
May 20, 2021

May 20, 2021 — Kīlauea

A close-up view of the western fissure vent complex and gas plume within Halema‘uma‘u, at the summit of Kīlauea. Gas emissions remain slightly elevated, with the most recent measurements on May 18 at 100 tonnes per day. The lava inlet from the base of the west vent, which no longer appears to be active, is visible on the right. USGS photo from the southern rim of Halema‘

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Color photograph of lava lake
December 28, 2020

Kīlauea's summit eruption continues on the Island of Hawai‘i. HVO field crews—equipped specialized safety gear and PPE—monitor the current eruption from within the closed area of Hawai‘i Volcanoes National Park with NPS permission. The west vent in Halema‘uma‘u remains active; the lava lake level has not changed.  Gas emissions and seismic activity at the summit remain elevated.

Color photograph of lava lake
December 27, 2020

The eruption continues at Kīlauea's summit, Island of Hawai‘i. With Hawai‘i Volcanoes National Park permission, HVO field crews—equipped with a range of specialized safety gear and PPE—monitor the current eruption from within the closed area. The west vent in Halema‘uma‘u remains active; the lava lake level has not changed.  Gas emissions and seismic activity at the summit remain elevated.

Color photograph of vent
December 26, 2020

The eruption continues in Halema‘uma‘u at Kīlauea Volcano's summit, Island of Hawai‘i. Activity continues at two vents in Halema‘uma‘u wall; the lava lake continues to grow. Gas emissions and seismic activity at the summit remain elevated. 

Color photograph of lava lake at night
December 25, 2020

Fountaining continues at two locations in Kīlauea Volcano's summit caldera, Island of Hawai‘i. Activity remains more vigorous at the northern (eastern) vent and intermittent at the western vent; both vents continue to feed the growing lava lake. Gas emissions and seismic activity at the summit remain elevated. HVO continues to closely monitor the situation. 

Color graphic of lava lake rise
December 24, 2020

‘Twas the Sunday before Christmas, the eve of the winter solstice, and festive holiday lights blinked of bright red and green. And then, shortly after 9:30 p.m. HST on December 20, so did the Hawaiian Volcano Observatory’s (HVO’s) volcano alert level/aviation color codes for Kīlauea!

Colo photograph of lava lake
December 24, 2020

Scientists continue to monitor the ongoing eruption in Kīlauea Volcano's summit caldera, Island of Hawai‘i. Fountaining continues at two locations, more vigorously at northern (eastern) vent and intermittent at western vent; both vents continue to feed the growing lava lake.

Color photo of volcanic lake
December 23, 2020

Scientists continue to monitor the ongoing eruption in Kīlauea Volcano's summit caldera, Island of Hawai‘i

Color photograph of eruption plume
December 22, 2020

 Scientists continue to monitor the ongoing eruption in Kīlauea Volcano's summit caldera, Island of Hawai‘i

lava fountain inside Kīlauea Caldera
December 21, 2020

Shortly after 9:30 p.m. HST on Sunday, December 20, an eruption occurred within Kīlauea’s summit caldera. This is an evolving situation. To get up-to-date information, please check the USGS Hawaiian Volcano Observatory website. For press inquiries, please email volcanomedia@usgs.gov. [update: 12/21/2020; 10:14am HST]

USGS science for a changing world
December 21, 2020

 Kīlauea Volcano is erupting. At 9:30 p.m. HST on December 20, the USGS Hawaiian Volcano Observatory (HVO) detected glow within Halemaʻumaʻu crater at the summit of Kīlauea Volcano, indicating that an eruption had commenced within Kīlauea’s summit caldera. 

Colo photograph of lava
December 20, 2020

Shortly after approximately 9:30 p.m. HST, the USGS Hawaiian Volcano Observatory (HVO) detected glow within Halemaʻumaʻu crater at the summit of Kīlauea Volcano. An eruption has commenced within Kīlauea’s summit caldera. The situation is rapidly evolving and HVO will issue another statement when more information is available.  

USGS science for a changing world
December 20, 2020

The U.S. Geological Survey's Hawaiian Volcano Observatory (HVO) recorded a magnitude-4.4 earthquake located beneath Kīlauea Volcano's south flank on Sunday, December 20, at 10:36 p.m. HST.