Unified Interior Regions

Hawaii

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Episode 61 (Peace Day) flow field...
October 4, 2012

Map showing the extent of lava flows erupted during Kīlauea’s ongoing east rift zone eruption and labeled with the years in which they were active.

Episode 61 (Peace Day) flow field...
September 25, 2012

Map showing the extent of lava flows erupted during Kīlauea's ongoing east rift zone eruption and labeled with the years in which they were active.

Episode 61 (Peace Day) flow field
August 8, 2012

Map showing the extent of lava flows erupted during Kīlauea’s ongoing east rift zone eruption and labeled with the years in which they were active.

Episode 61 ("Peace Day") flow field
June 29, 2012

Map showing the extent of lava flows erupted during Kīlauea’s ongoing east rift zone eruption and labeled with the years in which they were active.

Episode 61 (“Peace Day”) flow field
June 15, 2012

Map showing the extent of lava flows erupted during Kīlauea’s ongoing east rift zone eruption and labeled with the years in which they were active.

Episode 61 flow: April 11, 2012...
April 11, 2012

Map showing the extent of lava flows erupted during Kīlauea’s ongoing east rift zone eruption and labeled with the years in which they were active.

Episode 61 flow: March 20, 2012...
March 20, 2012

Map showing the extent of lava flows erupted during Kīlauea’s ongoing east rift zone eruption and labeled with the years in which they were active.

Episode 61 flow: February 8, 2012...
February 8, 2012

Map showing the extent of lava flows erupted during Kîlauea's ongoing east rift zone eruption and labeled with the years in which they were active.

Episode 61 flow: January 26, 2012...
January 26, 2012

Map showing the extent of lava flows erupted during Kīlauea’s ongoing east rift zone eruption and labeled with the years in which they were active.

Episode 61 (Peace Day) flow: January 12, 2012...
January 12, 2012

Map showing lava flows erupted during Kīlauea’s ongoing east rift zone eruption and labeled with the years in which they were active.

Kīlauea East Rift Zone Eruption Map: December 27, 2011...
December 27, 2011

Map showing the extent of lava flows erupted during Kīlauea's ongoing east rift zone eruption and labeled with the years in which they were active.

Kīlauea East Rift Zone Eruption Map: December 13, 2011...
December 13, 2011

Map showing the extent of lava flows erupted during Kīlauea's ongoing east rift zone eruption and labeled with the years in which they were active.

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Lava fountaining at night time.
June 18, 2018

Kīlauea Volcano —

Fissure 8 lava fountains obscured by a longer exposure photograph taken early morning on June 18. The incandescent spots along a horizontal line mark the edge of the 

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View of a crater with many cracks from slumping
June 18, 2018

Kīlauea Volcano — Halema‘uma‘u Crater (June 18, 2018)

Halema‘uma‘u viewed toward the west during the June 18 helicopter overflight. HVO and Jaggar Museum can barely be seen on the caldera rim in the upper right of the photograph.

June 17, 2018

Kīlauea Volcano — Fissure 8

In this video taken from the Leilani Estates subdivision, lava at 

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Kīlauea Volcano's lower East Rift Zone...
June 17, 2018

Kīlauea's LERZ

Morning overflight of Kīlauea Volcano's lower East Rift Zone by the Civil Air Patrol provides context for the location of the fissure 8 fountain and lava channel within the lower Puna District. View is to the north. Image courtesy of Civil Air Patrol.

plume rising from ocean entry
June 17, 2018

Kīlauea Volcano — Vacationland Laze Plume

Lava enters the ocean entry in the vicinity of Vacationland, producing a vigorous laze plume. Lava flowing into the ocean has built a delta of flows, rock rubble and black sand, which is over 320 acres in size.

Crater in the distance
June 17, 2018

Kīlauea Volcano — Halema`uma`u Crater

Inward slumping of the rim and walls of Halema‘uma‘u continues in response to ongoing subsidence at the summit. Sulfur dioxide emissions from the volcano's summit have dropped to levels that are about half those measured prior to the onset of the current episode of eruptive activity. This gas and very minor amounts of 

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View of lava channels
June 17, 2018

Kīlauea Volcano — Lava Channels

Occasionally, minor amounts of lava briefly spill over the lava channel levees. The spill overs are the shiny gray lobes along the channel margins. The lava flow field has been relatively stable with little change to its size and shape over the past few days. View to the east, with the 

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Aerial of Fissure 8
June 17, 2018

Kīlauea Volcano — Fissure 8

Morning overflight of Kīlauea Volcano's lower East Rift Zone by the Civil Air Patrol provides context for the location of the 

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Fissure activity and active ocean entry in Kīlauea Volcano's lower ...
June 16, 2018

Fissure activity and active ocean entry in Kīlauea's LERZ

Fissure 8 produces a lava fountain that pulses to heights of 55 to 60 m (185 to 200 ft). Spattering has built a cinder cone that partially encircles fissure 8, now 51 m (170 ft) tall at its highest point. The steam in the foreground is the result of heavy morning rain falling on warm (not hot) tephra (lava fragments).

Aerial of ocean entry
June 16, 2018

Kīlauea Volcano — Vacationland Ocean Entry

View of the active ocean entry in the vicinity of Vacationland. The interaction of hot lava with the ocean creates "laze", a corrosive seawater plume laden with hydrochloric acid and fine volcanic particles that can irritate the skin, eyes, and lungs, but that dissipates quickly with distance.

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HVO transforms stacks of paper earthquake records into digital squi...
May 4, 2017

With funding from USGS data rescue initiatives, HVO scanned seismograms from a number of significant earthquakes and seismic sequences. Since last summer, volunteer Marcy Frenz has enthusiastically and diligently assumed scanning duties at HVO, working through the 1974–1984 interval spanning Mauna Loa Volcano's two most recent eruptions.

By mid-afternoon, when these photos were taken, the drop in the lav...
April 27, 2017

Delta at the Kamokuna ocean entry slowly growing

Fissure of lava fountains erupting from Mauna Loa's upper southwest...
April 27, 2017

On June 13, 1950, Honolulu was suddenly blanketed by the thickest haze seen since recordkeeping began there in 1906.

A healthy coral reef at Buck Island, U.S. Virgin Island
April 20, 2017

In the first ecosystem-wide study of changing sea depths at five large coral reef tracts in Florida, the Caribbean and Hawai’i, U.S. Geological Survey researchers found the sea floor is eroding in all five places, and the reefs cannot keep pace with sea level rise. As a result, coastal communities protected by the reefs are facing increased risks from storms, waves and erosion.

HVO volunteer Ben Gaddis receives the "Citizen's Award for Exceptio...
April 20, 2017

Ben Gaddis was recently honored by the U.S. Geological Survey for his many years of service as HVO's volunteer photo archivist.

What's Hot and Not in Lava Field Fashion...
April 13, 2017

Here are some tips from for essential lava field fashion from the USGS Hawaiian Volcano Observatory geologists who walk miles on Kīlauea lava flows—both new and old.

HVO geologists encountered only one tiny breakout on the coastal pl...
April 8, 2017

Small delta has formed at ocean entry; evidence of recent delta collapses

For Sutton, It's Been A Gas!...
April 6, 2017

Hawaiian Volcano Observatory (HVO) staff, alumni and friends recently gathered to honor the long and fruitful career of Jeff Sutton, our recently retired colleague. 

Bogoslof Volcano, Alaska: ongoing eruption through the Bering Sea...
March 30, 2017

Hawai‘i is not the only island in the United States with an ongoing eruption involving hot lava and cold water.

Volcanic explosions provide the foundation for agriculture...
March 23, 2017

The ash deposits on the southeastern part of the Island of Hawai‘i have fortuitously presented an agricultural opportunity in an otherwise rocky and hilly landscape. An underappreciated fact is that the explosive nature of our volcanoes provided this opportunity.