Unified Interior Regions


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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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.

June 16, 2018

Kīlauea Volcano — Halema`uma`u Slumping

At Kīlauea Volcano's summit, inward slumping of the rim and walls of Halema‘uma‘u continues in response to ongoing subsidence. In this view to the southwest taken after this morning's event, a section of dark-colored wall rock (center left) has detached and dropped downward into the crater.

June 15, 2018

Live stream camera captures subsidence at Halema‘uma‘u

On June 15, 2018, a small explosion occurred at Kīlauea's summit at 11:56:39 AM HST. The event was captured by a live streaming camera and that footage is presented in this video clip. The 

Fissure 8 lava fountain
June 15, 2018

Kīlauea Volcano — Fissure 8 Lava Fountain

Photograph taken during helicopter overflight captures fissure 8 lava fountain.

seismologists install a nodal geophone on Kīlauea's lower East Rift Zone
June 15, 2018

seismologists install a nodal geophone on Kīlauea's lower East Rift Zo

University of Utah seismologists install a nodal geophone on Kīlauea's lower East Rift Zone in June 2018. This instrument was part of a network of 82 seismometers deployed temporarily this summer to help scientists study the magma transport system beneath the volcano's eruption sites.

Laze plumes from ocean entry of lava
June 15, 2018

Kīlauea Volcano — Ocean Entry

The ocean entry remains fairly broad with a white steam/laze plume blowing onshore. USGS image taken June 15, 2018.

View of a spatter cone
June 15, 2018

Kīlauea Volcano — Spatter Cone Building

Lava fountains from Fissure 8 reach heights of 200 ft overnight. The cinder and spatter cone that is building around

June 15, 2018

Kīlauea Volcano — Halema`uma`u Crater Enlargement

This animated GIF shows a sequence of radar amplitude images that were acquired by the Agenzia Spaziale Italiana CosmoSkyMed satellite system. The images illustrate changes to the 

June 14, 2018

Kīlauea Volcano — Fissure 8 Flow: From Vent to Sea

A helicopter overflight video of the lower East Rift Zone on June 14, 2018, around 6:00 AM, shows lava 

View of a fissure with lava and steam coming out
June 14, 2018

Kīlauea Volcano — Fissure 8 Cone Building

The Fissure 8 viewed from the north at 7:50 AM. The cone is roughly 50 m (165 ft) high at is peak, and a plume of sulfur dioxide and other volcanic gases rises as an orange tinge from the erupting lava fountains (hidden within the cone). Lava is still flowing out of the ventunabated as a full channel. To the left of the cone, a standing wave of lava can be seen in the

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Recent collapses at the Kamokuna ocean entry underscore on-going ha...
March 9, 2017

On December 31, 2016, almost the entire 23 acre lava delta and 4 acres of the older sea cliff slid into the ocean piece by piece over the course of the afternoon and into the evening. 

Pulsing magma supply detected at Kīlauea...
March 2, 2017

This is the story of how a new concept—slowly pulsing magma supply to Kīlauea—emerged from observations of the Overlook lava lake in Halema‘uma‘u.

Sluggish breakout on Kīlauea Volcano's coastal plain remains active...
March 2, 2017

Sluggish breakout on Kīlauea Volcano's coastal plain remains active

Remotely measuring the temperature of Kīlauea lava...
February 23, 2017

In early December 2016, scientists from the U.S. Geological Survey and NASA visited Kīlauea Volcano to experiment with a portable, ground-based camera system for use as an optical imaging pyrometer.

61g coastal lava flow remains active...
February 22, 2017

61g coastal lava flow remains active

NASA practices for Mars exploration on Kīlauea Volcano...
February 16, 2017

A simulated Mars landing mission unfolded on Kīlauea Volcano for two weeks in September 2016.

An FTIR instrument is set up on the rim of Halema‘uma‘u Crater to m...
February 14, 2017

A Valentine's Day view of Kīlauea Volcano's summit lava lake

High-flying NASA aircraft instruments simulate future satellite ima...
February 9, 2017

From late January through February, 2017, NASA is conducting this high-altitude airborne remote sensing data collection campaign over the State of Hawaii. Several NASA-funded, multi-year projects will use these data to study coral reefs and volcanic processes.

Photo of the upper portion of the "firehose" taken with a telephoto...
February 8, 2017

"Firehose flow" visible from public lava viewing area

Kīlauea is home to America's first volcano observatory...
February 2, 2017

A brief history of America's first volcano observatory—the Hawaiian Volcano Observatory (HVO).

The entire section of the sea cliff that was seaward of the hot cra...
February 1, 2017

Crack above Kīlauea's ocean entry has widened, increasing instability of sea cliff

At Kīlauea's ocean entry on Jan. 28 and 29, the interaction of molt...
January 30, 2017

Ground crack at Kīlauea ocean entry is cause for concern