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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Color photograph of crater floor with lava
June 27, 2014

Minor subsidence of the Pu‘u ‘Ō‘ō crater floor

The withdrawal of magma from within Pu‘u ‘Ō‘ō, to feed the new flows, has caused minor subsidence of the Pu‘u ‘Ō‘ō crater floor since this morning. This was associated with small collapses at the spatter cones on the crater floor. A partial collapse of this cone revealed a small pond of

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Hilo was again threatened by a Mauna Loa lava flow in 1881...
June 26, 2014

Hilo was again threatened by a Mauna Loa lava flow in 1882

A sketch by Joseph Nāwahī showing the 1881 lava flow approaching Hilo. (Courtesy of National Park Service, Hawai‘i Volcanoes National Park, HAVO 394, Volcano House Guest Register 1873 to 1885, illustration by Joseph Nāwahī, February 21, 1881.)

Image: Monitoring Volcanic Gases on Kilauea's East Rift Zone
May 31, 2014

Monitoring Volcanic Gases on Kilauea's East Rift Zone

Hawaiian Volcano Observatory Geochemist Jeff Sutton and CSAV international volcanology students visit a continuous gas monitoring site on Kilauea's east rift zone during field studies portion of the summer training course. Instrumentation at this site measures ambient concentration of noxious sulfur dioxide gas released from the volcano's vents, along with meteorological

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Image: Monitoring Volcanic Gases on Kilauea's East Rift Zone II
May 31, 2014

Monitoring Volcanic Gases on Kilauea's East Rift Zone II

Hawaiian Volcano Observatory Geochemist Jeff Sutton and CSAV international volcanology students visit a continuous gas monitoring site on Kilauea's east rift zone during field studies portion of the summer training course. Instrumentation at this site measures ambient concentration of noxious sulfur dioxide gas released from the volcano's vents, along with

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Small-scale map of Kīlauea's ERZ flow field...
April 28, 2014

Small-scale map of Kīlauea's ERZ flow field

Map showing the Kahauale‘a 2 flow in relation to the eastern part of the Island of Hawai‘i as of April 28, 2014. The most distant active front of the Kahauale‘a 2 flow was just over 8.3 km (5.2 miles) straight-line distance northeast of Pu‘u ‘Ō‘ō. Two other flows were also active on the flanks of Pu‘u ‘Ō‘ō, each erupting from a different vent. One, fed from a spatter cone

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Kīlauea Volcano's Kahauale‘a 2 lava flow: Should Puna residents be...
April 24, 2014

Kīlauea's Kahauale‘a 2 lava flow

The Kahauale‘a 2 lava flow, as of April 18, 2014, is shown in pink, with a yellow line indicating the active lava tube. The most distant active front of the flow retreated over the past week, probably in response to a DI event. The area covered by older lava flows erupted from Kīlauea in 1983-2013 is shown in gray. An updated map is posted at

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Small-scale map of Kīlauea's ERZ flow field...
April 18, 2014

Small-scale map of Kīlauea's ERZ flow field

Map showing the Kahauale‘a 2 flow in relation to the eastern part of the Island of Hawai‘i as of April 18, 2014. The most distant active front of the Kahauale‘a 2 flow had retreated slightly, probably in response to a DI event which occurred at Kīlauea's summit over past week, and was 7.5 km (4.7 miles) northeast of Pu‘u ‘Ō‘ō. Most flows were within the interior part of

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Bristle-thighed Curlews on James Campbell National Wildlife Refuge, Oahu, Hawaii
April 9, 2014

Curlews perching on the predator fence in the Ki’i Unit

Bristle-thighed Curlews perching on the predator fence in the Ki’i Unit of the James Campbell National Wildlife Refuge, Oahu, Hawaii

Grazed grasses interspersed with low shrubs in coastal dunes at Makahoa Point east of the Refuge
April 9, 2014

Grazed grasses in coastal dunes at Makahoa Point on Oahu, Hawaii

Grazed grasses interspersed with low shrubs in coastal dunes at Makahoa Point east of the James Campbell National Wildlife Refuge (JCNWR) on Oahu, Hawaii.

Small-scale map of Kīlauea's ERZ flow field...
April 7, 2014

Small-scale map of Kīlauea's ERZ flow field

Map showing the Kahauale‘a 2 flow in relation to the eastern part of the Island of Hawai‘i as of April 7, 2014. The active front of the Kahauale‘a 2 flow was 8.2 km (5.1 miles) northeast of Pu‘u ‘Ō‘ō and advancing very slowly through thick forest. The area of the Kahauale‘a 2 flow as of March 21 is shown in pink, while widening of the flow since then is shown in red. Older

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UHH is part of the HVO team monitoring Kīlauea eruptions...
April 3, 2014

UHH is part of the HVO team monitoring Kīlauea eruptions

Scanning Electron Microscope images, collected at UH Hilo, showing a fragment of lava collected from the Pu‘u ‘Ō‘ō lava pond in November 2013. The bar scale at the right is 300 microns (0.012 in). The mostly uniform light gray is basalt glass and darker gray crystals are olivine (left) and pyroxene (right). Both crystals contain melt inclusions comprised of light gray

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Mar 7, 2014: A close-up of the lava pond in Pu‘u ‘Ō‘ō crater, with ...
March 7, 2014

Mar 7, 2014: lava pond in Pu‘u ‘Ō‘ō, with snow-covered Mauna Kea in...

Mar 7, 2014: A close-up of the lava pond in Pu‘u ‘Ō‘ō crater, with snow-covered Mauna Kea in the distance.

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USGS
November 26, 2003

A stunning colored map of Hawai`i, stretching from Ni`ihau to the Big Island, has just been published. This map is different from most others, because it shows the topography of the sea floor as well as of the islands. It measures 63.5 by 96.5 cm (25 by 28 inches) and is printed on heavy poster paper, suitable for hanging and display.

photo of lava
November 21, 2003

Pu`u `O`o and upper Mother's Day tube

USGS
November 20, 2003

Every November, we usually include a column on earthquakes in Hawaii to remind residents and to inform newcomers of the high seismic hazard on the island. November is chosen because the two largest earthquakes in the past 50 years occurred in this month.

USGS
November 13, 2003

Energy from the sun supports most life on our planet, but far below the sea surface, another, less obvious energy source pumps heat and life-giving energy into the earth's biosphere. As a result, life persists independent of the sun's energy in some special seafloor environments.

USGS
November 6, 2003

Kīlauea's eruption is 24/7; it needs no sleep, takes no days off, and cares not if rain is falling in buckets. HVO's staff is not 24/7; it needs sleep, takes days off, and can't do much observing in heavy rain. How, then, does HVO watch the eruption?

photo of lava
November 5, 2003

Continued activity at and near Pu`u `O`o

USGS
October 30, 2003

Two weeks ago, scientists from around the world came together to discuss past and future research on an important, but little known, volcano. Long Valley Volcano, near the town of Mammoth Lakes, California, does not have the classic look of Mt. Fuji or the characteristic shield-shape of Kīlauea or Mauna Loa.

photo of lava
October 28, 2003

Early morning spatter in West Gap Pit, and a few aerials