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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thumbnail image of Preliminary summary of Kīlauea Volcano’s 2018 lower East Rift Zone eruption and summit collapse
September 27, 2018

Preliminary summary of Kīlauea Volcano’s 2018 lower East Rift Zone

Preliminary summary of Kīlauea Volcano’s 2018 lower East Rift Zone eruption and summit collapse.

Click on the image above to view the PDF.

HVO scientist conducts an interview at the summit of Kīlauea Volcan...

HVO scientist conducts interview at summit of Kīlauea in 2011

HVO scientist conducts an interview at the summit of Kīlauea Volcano in 2011

Thermal view of JT cam

[JTcam] Halemaʻumaʻu Overlook Vent Thermal HD at Halemaʻumaʻu Overlook

This image is from a temporary thermal camera. The temperature scale is in degrees Celsius up to a maximum of 500 Celsius (932 Fahrenheit) for this camera model, and scales based on the maximum and minimum temperatures within the frame. Thick fume, image pixel size and other factors often result in image temperatures being lower than actual surface temperatures. 

Image: An Endangered Honeycreeper, the  `Akeke`e (Kauai Akepa), in Hawaii

An Endangered Honeycreeper, the `Akeke`e (Kauai Akepa), in Hawaii

Many species of Hawaiian honeycreepers have persisted into the 20th century because high elevation rain forests on the islands of Kaua’i, Maui, and Hawai’i are cool enough to limit transmission of introduced avian malaria (Plasmodium relictum). Malaria transmission is tied closely to the effects of temperature on development of malarial parasites within their

Image: Minute Gem Snail (Hawaiia minuscula)

Minute Gem Snail (Hawaiia minuscula)

Hawaiia minuscula shell viewed with a scanning electron microscope with aperture facing up.

Attribution: Ecosystems
Changes at Halemaumau over time...
July 31, 2018

Frequently Asked Questions about Deformation at Kīlauea Summit

At present, the summit of Kīlauea Volcano is undergoing dramatic changes. The caldera floor is subsiding. The rim and walls of Halemaʻumaʻu are slumping inward. Nearby residents feel moderate-sized earthquakes, and see small ash plumes rise from the crater. The responses to these Frequently Asked Questions address the reasons behind the current activity at Kīlauea Volcano’

HVO geologist describes activity from Kīlauea Volcano during a fiel...

Geologist describes activity from Kīlauea during a field trip to co...

HVO geologist describes activity from Kīlauea Volcano during a field trip to the coastal lava flow field for members of the media in 2010.

KWcam images comparing first 2 weeks of Halema‘uma‘u crater eruption

KWcam webcam images compare the changes within Halema‘uma‘u crater since the eruption at Kīlauea Volcano’s summit started two weeks ago. The left image, taken on December 21 at 7:02 a.m. HST, shows the west vent (lower center) and north vent (center left) both erupting lava that is cascading into the new lava lake. In the right image from this morning, January 4 at 9:30 a.

Clear day view of PS Cam

[PScam] Puʻu ʻŌʻō South Flank from the South Rim

This image is from a temporary research camera positioned just south of Puʻu ʻŌʻō, looking north at the southern flank of Puʻu ʻŌʻō's cone.


The webcams are operational 24/7 and faithfully record the dark of night if there are no sources of incandescence or other lights. Thermal webcams record heat rather than light and get better

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November 27, 1996

Much has been said in past columns about the volcanic and seismic hazards on the Big Island, but what about the hazards on the other islands?

November 15, 1996

Visitors to the lava viewing area at the end of the Chain of Craters road in Hawai`i Volcanoes National Park travel over one of the largest fault systems on the island on Hawai`i. The Hilina fault system, located within the south flank of Kīlauea Volcano, consists of a series of subparallel and en echelon normal faults.

November 8, 1996

The eruption on Kīlauea's east rift zone has continued with little change since mid-summer. Lava issues at a rate of 6 cubic yards per second from a vent on the west flank of the Pu`u `O`o cone and flows through a lava tube for 6 miles to the sea.

November 1, 1996

William D. Westervelt, in his 1916 book "Hawaiian Legends of Volcanoes", recounted a story about the origin of the two hills called "Na Pu`u a Pele," located on the Ka`u coast, a mile west of where the "road to the sea" reaches the ocean southwest of Hawaiian Ocean View Estates. 

October 25, 1996

The shape of active volcanoes is constantly changing. Large movements occur during dike intrusions, large earthquakes, or landslides. 

October 18, 1996

Early last week, C. Barry Raleigh, Dean of the School of Ocean and Earth Science and Technology at the University of Hawaii, Manoa, announced that the National Science Foundation approved and funded the Hawaii Scientific Drilling Project (HSDP) proposal.

October 11, 1996

While scientists in Hawaii have been investigating the recent activity of Lō‘ihi Volcano beneath 3000 ft of seawater, in Iceland they're watching an eruption that is taking place beneath 2500 ft of glacial ice!

October 4, 1996

USGS geologist Tina Neal reports from HVO's sister observatory in Anchorage (AVO) that Pavlof, the recently awakened volcano at the tip of Alaska Peninsula, is spewing fiery fountains of lava up to 900 feet in the air. 

September 27, 1996

Scientists from the University of Hawai`i at Manoa are once again engaged in a research cruise over Lo`ihi, the submarine volcano southeast of the Island of Hawai`i. 

September 20, 1996

The U.S. Geological Survey's Volcano Hazards Program funds the operations of three volcano observatories in the United States. They are the Hawaiian, Cascades, and Alaska Volcano Observatories, and, as their names imply, each is responsible for monitoring volcanoes in a specific geographic area.

Eruption status and shoreline hazards...
September 13, 1996

The current Kīlauea East Rift Zone eruption, which began in January 1983, continues without significant changes. 

September 6, 1996

The primary mission of the Hawaiian Volcano Observatory (HVO) is to evaluate earthquake and volcanic hazards and provide timely information to the various State and County officials responsible for emergency preparedness and response.