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.

States L2 Landing Page Tabs

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Aerial of lava channel
June 21, 2018

Kīlauea Volcano — Wide Lava Channel

At a wide point in the channelized lava flow, a ropy crust has formed over the more fluid 

June 21, 2018

Kīlauea Volcano — Lava Boats in Fissure 8 Channel

Geologists captured this time-lapse video of the perched lava channel issuing from 

Laze plume from ocean entry
June 20, 2018

Kīlauea Volcano — Multiple Laze Plumes

Small streams of lava enter the ocean across a broad area, shown by the multiple white steam and laze plumes. Lava has added about 380 acres of new land into the sea.

Looking down at the crater where the parking lot used to be.
June 20, 2018

Kīlauea Volcano — Halema`uma`u Parking Lot Gone

View of the southern edge of the growing Halema‘uma‘u crater (middle right) during yesterday's helicopter-assisted work at Kīlauea's summit. The once-popular parking lot (closed since 2008) that provided access to Halema‘uma‘u is no longer—the parking lot fell into the crater this past week as more and more of the Kīlauea Crater floor slides into Halema‘uma‘u. The Crater

A geologist points a thermal camera at a fissure to take a temperature reading
June 20, 2018

Kīlauea Volcano — Temperature Readings

HVO geologist measures 260 degrees C (500 degrees F) along ground cracks near fissure 10 in Leilani Estates. Geologists routinely make temperature measurements to track changes throughout the fissure complex in the lower East Rift Zone.

Aerial view of lava channels
June 20, 2018

Kīlauea Volcano — Lava Channel from Fissure 8

Lava from fissure 8 travels about 13 km (8 mi) to the ocean in an open channel. Lava remains incandescent (glowing orange) throughout its journey. The ocean entry is at upper right.

Close up view of pāhoehoe
June 20, 2018

Kīlauea Volcano — Sluggish Pāhoehoe

Sluggish pāhoehoe briefly spills over a section the levee along the well-established lava channel. Such overflows generally travel short distances measured in

GPS monitoring station on the caldera floor
June 20, 2018

Kīlauea Volcano — GPS Station

A temporary GPS station (with radio telemetry for continuous measurement) was installed this week on the Kīlauea caldera floor to track the ongoing

Fissure 8 and lava channel from above
June 20, 2018

Kīlauea Volcano — Fissure 8 Aerial

Fissure 8 lava fountains reached as high as about 50 m (164 ft) during the past day. The fountain height varies, often sending a shower of 

Geologists at work monitoring Kīlauea's Lower East Rift Zone erupti...
June 20, 2018

Geologists at work monitoring Kīlauea's LERZ eruption

Geologist makes early morning observations of the lava fountain and channelized flow at fissure 8 in Leilani Estates.

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Clear evening views of Halema‘uma‘u's lava lake...
July 20, 2017

Clear evening views of Halema‘uma‘u's lava lake

Greater White-fronted Goose on the North Slope of Alaska
July 17, 2017

Direct encounters with humans can increase the likelihood that nesting geese will lose their eggs to predators, according to a recent study released Monday, July 17.

New map reveals geologic history of Mauna Loa Volcano's northeast f...
July 13, 2017

The new "Geologic map of the northeast flank of Mauna Loa volcano, Island of Hawai‘i," the culmination of many years of work by Hawaiian Volcano Observatory (HVO) geologists, was recently published by the U.S. Geological Survey.

This video clip (at x30 speed) shows the pāhoehoe breakouts on the ...
July 13, 2017

Front of coastal plain breakout stalled

Continued spattering in the summit lava lake...
July 11, 2017

Continued spattering in the summit lava lake

Image: 'Akiapōlā'au
July 10, 2017

Forest birds on the island of Hawaii are responding positively to being restored in one of the largest, ongoing reforestation projects at Hakalau Forest National Wildlife Refuge, according to a new study released July 10 in the journal Restoration Ecology.

A zoomed in view of the Kamokuna lava delta reveals several crack s...
July 10, 2017

June 26 breakout continues to advance across the coastal plain

This video shows timelapse images of active pāhoehoe toes near the ...
July 6, 2017

Recent breakout is advancing on the coastal plain

Looking back at the Kamoamoa fissure eruption...
July 6, 2017

With over 1,000 articles on almost every volcano topic imaginable, the Volcano Watch archive is a treasure trove of information on Hawaiian volcanoes. 

Kīlauea eruptive events rival the excitement of July Fourth firewor...
June 29, 2017

This week's Volcano Watch is a photo essay featuring notable images from Kīlauea Volcano's two ongoing eruptions: East Rift Zone (Pu‘u ‘Ō‘ō), which began in 1983, and summit (Halema‘uma‘u), which began in 2008.

Impressive spattering in the summit lava lake...
June 28, 2017

Impressive spattering in the summit lava lake