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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Thermal map of flow field...
January 5, 2018

This map shows a thermal map over the Episode 61g lava flow.

Map of Flow Field...
January 5, 2018

Recent changes to Kīlauea’s East Rift Zone lava flow field.

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. 

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The lava lake within Halema‘uma‘u crater, at the summit of Kīlauea, remains active
February 1, 2021

Eruptive activity continues within Halema‘uma‘u crater—Kīlauea summit

The lava lake within Halema‘uma‘u crater, at the summit of Kīlauea, remains active. An HVO geologist uses a laser rangefinder to measure the elevation of various spots on the lava lake surface. Today (February 2), the active, western portion of the lake was about 213 m (699 ft) deep. HVO scientists continue to monitor the eruption from an area of Hawai‘i Volcanoes National

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January 31, 2021

Continued Eruption at Halema‘uma‘u Crater, Kīlauea

Eruptive activity continues within Halema‘uma‘u crater, at the summit of Kīlauea. The western fissure continues to supply lava into the lava lake, with active surface lava largely confined to the western portion of the lake.
 

Eruptive activity continues in Halema‘uma‘u crater, at the summit of Kīlauea.
January 31, 2021

Eruptive activity continues in Halema‘uma‘u crater, at Kīlauea summit

Eruptive activity continues in Halema‘uma‘u crater, at the summit of Kīlauea. The active surface lava remains largely confined to the western (left) portion of the lava lake. As of the afternoon of January 31 lava had filled about 212 m (695 ft) of Halemaʻumaʻu in the active western portion of the lava lake. USGS photo by M. Patrick.

A close-up view of the western fissure, which is supplying lava to the lava lake in Halema‘uma‘u crater.
January 31, 2021

A close-up view of the western fissure in Halema‘uma‘u crater

A close-up view of the western fissure, which is supplying lava to the lava lake in Halema‘uma‘u crater. A slow-moving lava stream marked the inlet where lava entered the lake. Several incandescent openings remain over the vent region. USGS photo by M. Patrick.

A close-up view of the main island near the center of the lava lake in Halema‘uma‘u.
January 31, 2021

A close-up view of the main island in Halema‘uma‘u

A close-up view of the main island near the center of the lava lake in Halema‘uma‘u. All the islands have been stationary since approximately January 10. USGS photo by M. Patrick.

A view of the central region of the lava lake in Halema‘uma‘u.
January 31, 2021

Central region of the lava lake in Halema‘uma‘u

A view of the central region of the lava lake in Halema‘uma‘u. On the left is the main island. In the center, a lobe of surface lava is moving south (towards the bottom of the photo) as surface crust founders along its leading edge. Just below the center point of the photo a terracing can be seen marking the front of previous advancing, overlapping lobes in this area. On

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A close-up view of the active lobe of surface lava moving south in the central part of the Halema‘uma‘u lava lake.
January 31, 2021

Close-up view of surface lava—Halema‘uma‘u lava lake, Kīlauea summit

A close-up view of the leading edge of the active lobe of surface lava slowly moving south in the central part of the Halema‘uma‘u lava lake. USGS photo by M. Patrick.

HVO geologists collect tephra from the December 2020 deposit, found in the Southwest Rift Zone of Kīlauea Volcano
January 29, 2021

Geologists collect tephra from December 2020—Kīlauea Volcano

Hawaiian Volcano Observatory geologists collect tephra from the December 2020 deposit, found in the Southwest Rift Zone of Kīlauea Volcano on January 29, 2021. The sample collection and mapping of the deposit helps scientists to better understand the dispersal and extent of the tephra from this eruption. This area of Hawai‘i Volcanoes National Park remains closed to the

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View of the active west vent from the south rim of the Halemaʻumaʻu crater on January 29, 2021
January 29, 2021

Western vent remains active within Halemaʻumaʻu crater—Kīlauea Volcano

View of the active west vent from the south rim of the Halemaʻumaʻu crater on January 29, 2021. The west vent is almost completely crusted over and the effusion is slow from the base of the spatter cone. This photograph was taken from an area of Hawai‘i Volcanoes National Park that remains closed to the public for safety reasons. USGS photo taken by D. Downs.

Color photograph of lava lake
January 26, 2021

Late afternoon view of Halema‘uma‘u lava lake, January 26, 2021

HVO scientists observed the Halema‘uma‘u lava lake from the southern crater rim in the late afternoon on Tuesday. In this view, the active western fissure at Kīlauea's summit is visible to the left. The circulating western portion (left) of the lava lake has a more silvery color than the stagnant eastern portion (right). Several of the islands in the lake, including the

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Color photograph of volcanic vent
January 26, 2021

Late afternoon view of Halema‘uma‘u lava lake, January 26, 2021

This close-up view of the active western fissure in Halema‘uma‘u at Kīlauea's summit was captured through the lens of a laser ranging device used by HVO scientists to measure distances to features within the crater. Though somewhat concealed by spatter deposits, lava is assumed to be originating below the incandescent skylights near the top of the cone, which stands

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January 26, 2021

When will Mauna Loa erupt next?

Because Mauna Loa has been quiet for almost 30 years, residents may not be aware that Mauna Loa is an active volcano. When Mauna Loa erupts, it is capable of disrupting lives and commerce throughout the Island of Hawai‘i. What can we learn from Mauna Loa’s past eruptions? What are the signs we need to look for in the future that might portend the next eruption of the world

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image related to volcanoes. See description
December 18, 2019

Overflight of Kīlauea summit on December 18

image related to volcanoes. See description
December 13, 2019

HVO monitoring equipment on the north rim of Pu‘u ‘Ō‘ō

image related to volcanoes. See description
December 12, 2019

Kīlauea summit lake observation and Keller Well measurements, December 2019

image related to volcanoes. See description
November 29, 2019

Halema‘uma‘u water pond on November 28

image related to volcanoes. See description
November 22, 2019

HVO field engineers install new telemetry hub

image related to volcanoes. See description
November 21, 2019

Continued slow rise of water level at bottom of Halema‘uma‘u

image related to volcanoes. See description
November 20, 2019

Monitoring gases and investigating thermal areas.

HVO scientists performed some preliminary tests of the water at the caldera rim
October 29, 2019

Video of the water sampling at Kīlauea summit with an unmanned aircraft system

image related to volcanoes. See description
October 28, 2019

Water sampling at Kīlauea summit with an unmanned aerial system

image related to volcanoes. See description
October 25, 2019

Continued slow rise of water level at bottom of Halema‘uma‘u

image related to volcanoes. See description
October 19, 2019

Water pond at Kīlauea summit continues to rise and enlarge

The Great Hawaii ShakeOut: Get ready toàDrop, Cover, and Hold on!...
October 17, 2019

HVO staff practice Drop, Cover, and Hold during the Great Hawaii ShakeOut