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 showing flow field changes...
March 24, 2015

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

Map of proximal flow field with thermal overlays...
March 17, 2015

This map overlays georegistered mosaics of thermal images collected during a helicopter overflight of the three areas of breakouts near Pu‘u ‘Ō‘ō on March 17 at about 8:00 AM.

Small-scale map of flow field...
March 10, 2015

This small-scale map shows Kīlauea’s active East Rift Zone lava flow in relation to lower Puna. 

Map of proximal flow field with thermal overlays...
March 10, 2015

This map overlays georegistered mosaics of thermal images collected during a helicopter overflight of Kīlauea’s active East Rift Zone lava flow near Pu‘u ‘Ō‘ō on March 10 at about 10:25 AM.

Map of flow field west of Kaohe Homesteads with thermal overlay...
March 10, 2015

This map overlays a georegistered mosaic of thermal images collected during a helicopter overflight of Kīlauea’s active East Rift Zone lava flow west of Kaohe Homesteads on March 10 at about 10:30 AM. 

Map of distal flow field with thermal overlay...
March 10, 2015

This map overlays a georegistered mosaic of thermal images collected during a helicopter overflight of the distal part of Kīlauea’s active East Rift Zone lava flow on March 10 at about 10:35 AM.

Map of distal flow field...
March 10, 2015

This large-scale map uses a satellite image acquired in March 2014 (provided by Digital Globe) as a base to show the area around the front of Kīlauea’s active East Rift Zone lava flow. 

Satellite image of area around front of Kīlauea's East Rift Zone la...
March 3, 2015

This satellite image was captured on Tuesday, March 3, 2015 by the Landsat 8 satellite. 

Map of flow field west of Kaohe Homesteads with thermal overlay...
February 27, 2015

This map overlays a georegistered mosaic of thermal images collected during a helicopter overflight of Kīlauea’s active East Rift Zone lava flow west of Kaohe Homesteads on February 27 at about 11:35 AM. 

Map of proximal flow field with thermal overlays...
February 27, 2015

This map overlays georegistered mosaics of thermal images collected during a helicopter overflight of Kīlauea’s active East Rift Zone lava flow near Pu‘u ‘Ō‘ō on February 27 at about 11:50 AM. £

Map of distal flow field with thermal overlay...
February 27, 2015

This map overlays a georegistered mosaic of thermal images collected during a helicopter overflight of the distal part of Kīlauea’s active East Rift Zone lava flow on February 27 at about 11:40 AM. 

Map of distal flow field...
February 27, 2015

This large-scale map uses a satellite image acquired in March 2014 (provided by Digital Globe) as a base to show the area around the front of Kīlauea’s active East Rift Zone lava flow. 

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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 and crater wall
May 20, 2021

May 20, 2021 — Kīlauea

A close-up view of the northeastern rim of the Halema‘uma‘u lava lake, at the summit of Kīlauea. This area of the lava lake has been degassing persistently for the past few months. Several large boulders, which fell from the crater walls, are visible near the perimeter of the northern lava lake crust (center). The top of the inactive northern vent cone is visible in the

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May 19, 2021

Resurfacing event on small lava pond in Halema`uma`u

The area of active surface lava has diminished over the past month in Halema`uma`u crater, at the summit of Kilauea. Today, active surface lava was limited to a small pond, about 20 meters (yards) long. The pond surface was normally covered with a stationary crust, but occasionally resurfaced. This video shows crustal foundering during a resurfacing event. A gust of wind

Thermal images of lava lake
May 19, 2021

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

This comparison of thermal images taken from the south rim of Halema‘uma‘u, at the summit of Kīlauea, show the diminishing area of active lava on the surface over the past month. Today, active lava was limited to a small pond, about 20 meters (yards) long, near the western fissure. USGS images by M. Patrick.

Color photograph of lava lake
May 18, 2021

Close-up view of remaining lava lake within Halema‘uma‘u, May 18, 2021

This close-up view of the of the Halema‘uma‘u lava lake at the summit of Kīlauea was captured on Tuesday, May 18. During an approximately one-hour visit to the crater rim, USGS Hawaiian Volcano Observatory scientists' only observation of active lava was the crustal foundering event captured here, which lasted approximately five minutes. All that remains of the active lava

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May 17, 2021

Thermal timelapse of summit lava lake

The lava lake in Halemaʻumaʻu crater, at the summit of Kīlauea, remains active but has diminished in area and vigor over the past month. This thermal timelapse sequence shows the changes in the lake activity over the past month. In mid-April the area of active surface lava in the lake was approximately 7.5 acres (3 hectares). By mid-May the area was about 0.5 acres (0.2

Color photograph of caldera
May 15, 2021

Routine visit to Mauna Loa summit

On May 15, USGS Hawaiian Volcano Observatory geologists did a routine hike to the summit of Mauna Loa and inspected summit monitoring equipment. Clear weather provided good views across the floor of Moku‘āweoweo, Mauna Loa's summit caldera, and nothing unusual was observed.

Color photograph of caldera
May 15, 2021

Routine visit to Mauna Loa summit

A USGS Hawaiian Volcano Observatory geologist inspects the thermal camera at the summit of Mauna Loa on May 15, 2021.

The lava lake in Halema‘uma‘u crater, at the summit of Kīlauea, remains active
May 14, 2021

View of the active lava lake area in Halema‘uma‘u—Kīlauea, May 14

The lava lake in Halema‘uma‘u crater, at the summit of Kīlauea, remains active, although surface incandescence (glowing red lava) has become less frequent over the last few days. In this view looking northwest, two elongated lobes oriented west (left) to east (right) with a relatively smooth shiny grey surface are visible in the center of the photo. These two lobes

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USGS Hawaiian Volcano Observatory geologists conducted an overflight of Kīlauea's summit on the morning of May 13
May 13, 2021

Kīlauea summit overflight - May 13

USGS Hawaiian Volcano Observatory geologists conducted an overflight of Kīlauea's summit on the morning of May 13. Though no incandescence was visible during the overflight, field crews monitoring the ongoing eruption in Halema‘uma‘u from the ground observed a small amount of fluid lava on the surface later in the day. In this aerial photo, the west vent area is in the

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More of Kīlauea's lava lake surface in Halema‘uma‘u crater has solidified in recent weeks, evident in this May 13 aerial view
May 13, 2021

Kīlauea summit overflight - May 13

More of Kīlauea's lava lake surface in Halema‘uma‘u crater has solidified in recent weeks, as is evident in this aerial view taken yesterday, May 13. However, gas emissions and small patches of active lava on the surface indicate that the eruption continues. Most recently, gas emissions were measured as 225 tonnes per day on May 12. The bluish-tinged plume of volcanic gas

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A low, oblique aerial view of the west vent in Halema‘uma‘u at Kīlauea's summit
May 13, 2021

Kīlauea summit overflight - May 13

A low, oblique aerial view of the west vent in Halema‘uma‘u at Kīlauea's summit (upper right) taken during an overflight on May 13. The area of active lava has slowly been decreasing in recent weeks, but not all of the lava lake surface has stagnated. Portions of the lake surface continue to resurface via a process called foundering. During foundering, the dense solidified

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image related to volcanoes. See description
March 2, 2020

Water pond in Halema‘uma‘u continues to grow

image related to volcanoes. See description
January 31, 2020

Halema‘uma‘u crater lake on January 31

image related to volcanoes. See description
January 21, 2020

Routine overflight of Kīlauea's East Rift Zone

image related to volcanoes. See description
January 17, 2020

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

image related to volcanoes. See description
January 13, 2020

HVO collaborates in conducting fieldwork on Kīlauea

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