Unified Interior Regions

Hawaii

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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. 

Map of proximal flow field with thermal overlay...
February 23, 2015

This map overlays a georegistered mosaic of thermal images collected during a helicopter overflight of Kīlauea’s active East Rift Zone lava flow near Pu‘u ‘Ō‘ō on February 23 at about 12:00 PM.

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Aerial view of lava channel
June 24, 2018

Kīlauea Volcano — Ocean Entry

Lava is entering the sea on the southern side of the entry area primarily through the open channel, but also along a 1 km (0.6 mi) wide area. The entry areas are marked by billowing laze plumes. The interaction of lava with the ocean creates "laze", a corrosive seawater 

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Lava flowing across the landscape
June 24, 2018

Kīlauea Volcano — Lava Flows from Fissure 8

View to the southwest, looking "up" the lava channel. Lava flows from Fissure 8 (not pictured) through the open channel about 13 km (8 mi) to the ocean. Lava remains incandescent (glowing orange) along the entire length of the channel with sections of cooled lava (black) on the surface. The dark areas in the lower portion of the image are parts of the early lava flow from

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Lava fountain with lava flow
June 24, 2018

Kīlauea Volcano — Fissure 8 Fountain

At fissure 8, fountains provide a vigorous supply of lava that exits the cinder cone and drops over a spillway to enter a well-established 

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Geologist pointing into the distance along a road with a straight roadway beside him.
June 24, 2018

Kīlauea Volcano — Roadway Crack Observations

USGS field crews track activity in and around Leilani Estates in Kīlauea Volcano's lower East Rift Zone. Observations are also collected on a daily basis from cracks in the area of Highway 130, shown here (no changes in temperature, crack width, or gas emissions have been noted recently).

Lava spattering from a cone
June 24, 2018

Kīlauea Volcano — Spatter Cone (Fissure 8)

The spatter cone at fissure 8 is now about 55 m (180 ft) tall. 

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Small plume cloud from a crater
June 24, 2018

Kīlauea Volcano — Small Halema`uma`u Eruption (June 24, 2018)

On June 24 a small ash-poor steam plume rose above the Halema‘uma‘u crater rim following another collapse explosion event at 4:12 p.m. HST (image taken at 4:27 p.m.).

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Kīlauea summit subsides and produces frequent earthquakes...
June 24, 2018

Kīlauea summit subsides and produces frequent earthquakes

On June 23, 2018 at 4:32 p.m. HST after approximately 17 hours of elevated seismicity, a collapse explosion occurred at the summit if Kīlauea. The energy released by the event was equivalent to a magnitude 5.3 earthquake. During the intense shaking, rockfalls cascaded down the northern margin of the caldera wall just below Uēkahuna Bluff sending rock dust into the air.

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Crater view
June 23, 2018

Kīlauea Volcano — Halema`uma`u Crater Collapse (June 23, 2018)

On June 23, 2018 at 4:32 p.m. HST after approximately 17 hours of elevated seismicity, a collapse explosion occurred at the summit if Kīlauea. The energy released by the

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Kīlauea fissure 8 lava channel transports "lava boats"...
June 23, 2018

Kīlauea fissure 8 lava channel transports "lava boats"

Geologists captured this time-lapse video of the perched lava channel issuing from fissure 8 on Kīlauea's lower East Rift Zone.

Rafts of accreted lava move down stream and look like boats moving down a river. These are termed lava balls or lava boats and form when portions of the fissure 8 cone or levees break away and are rafted down stream. As they move along

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Aerial of lava channel
June 22, 2018

Kīlauea Volcano — Fissure 8 Lava Channel

Early morning view of the open lava channelbeginning about 5 km (3.1 miles) from Fissure 8. The channel bends 90 degrees to the south (right) on the far side of

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Creative engineering helps HVO monitor Mauna Loa Volcano...
August 24, 2017

The USGS Hawaiian Volcano Observatory (HVO) has a long tradition of innovation when it comes to the tools that we use to monitor the status and activity of volcanoes.

At 9:35 pm HST on August 19, there was a large littoral explosion n...
August 21, 2017

Short-lived lava falls at Kamokuna ocean entry

The ongoing Pu‘u ‘Ō‘ō eruption is full of anniversaries...
August 17, 2017

The longest-lived and most voluminous rift-zone eruption of Kīlauea Volcano in more than 500 years—the ongoing Pu‘u ‘Ō‘ō eruption—began in January 1983, and is fast approaching its 35th anniversary.

Thermal Cameras Keep a Cool Eye on Hot Lava...
August 10, 2017

Thermal cameras have been used by volcanologists around the world for many years to study volcanic processes and search for signs of impending eruptions.

While mapping the flow margins, HVO geologists found an opening int...
August 9, 2017

Activity continues on the 61g flow field and at the ocean entry

Time-lapse sequence shows Halema‘uma‘u gas plume...
August 7, 2017

Time-lapse sequence shows Halema‘uma‘u gas plume

Lava cascades out of perched lava channel into lower channel, Pu‘u ...
August 3, 2017

Kīlauea has now passed the one-year anniversary of the episode 61g lava flow reaching the Pacific Ocean. But what was this busy volcano up to a decade ago?

On the coastal plain, the front of the June 26 breakout was stalled...
July 31, 2017

Kamokuna lava delta subsidence continues

Summit lava lake level continues dropping...
July 29, 2017

Summit lava lake level continues dropping

HVO geologists captured this image of a Koa‘e kea (white-tailed tro...
July 28, 2017

Time-lapse sequence of lava delta subsidence at ocean entry

Largest Hawaiian earthquake in a decade reminds us to be prepared...
July 27, 2017

On June 8, 2017, many Island of Hawai‘i residents were awakened by a sharp jolt just past 7 a.m. This natural wake-up call was caused by a magnitude-5.3 earthquake, the largest to strike Hawaii in over a decade.