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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January 14, 2003

Lava pouring from inflating flow

Same sheet of lava pouring from inflating flow but seen from different angle.

January 14, 2003

Single toe in action

Single toe in action. Note concentric wrinkes forming at bottom of view.

January 14, 2003

Low-angle view of fluid toe spreading out

Low-angle view of fluid toe spreading out. Note moving dark crust on distant part of toe.

January 7, 2003

Channeled cascade on Paliuli

Channeled cascade on Paliuli. Other videos on this day focus on front of this cascade. Wind noise in this and other clips is obvious, but listen for sounds of pieces of crust scraping against one another or across ground. For scale, flow front in all clips is 1-1.5 m high.

January 7, 2003

Fluid lava leaks from inside crusted front of cascade

Fluid lava leaks from inside crusted front of cascade.

January 7, 2003

More disruption of slabby flow front

More disruption of slabby flow front.

January 7, 2003

More disruption of slabby flow front

More disruption of slabby flow front.

Image: Hawaiian Coot (Fulica alai)
January 1, 2003

Hawaiian Coot (Fulica alai)

Hawaiian Coot swimming in a wetland marsh. Listed as an endangered species in 1970. Dark gray with a white bill and frontal shield that varies from white, pale buff, and pale blue to deep red.

Image: Waterfall, Maui, Hawaii
December 31, 2002

Waterfall, Maui, Hawaii

Waterfall, Maui, Hawaii.

December 27, 2002

Lava pours down pre1995 sea cliff

Lava pours down pre1995 sea cliff. See stills above for more information. Note large file size. Warning: turn down your sound; lots of wind noise.

December 12, 2002

PubTalk 12/2002 — Hawai`i's Volcanoes—Never a Dull Moment

20 Years of Eruption at Kilauea and Waiting for Mauna Loa

by Don Swanson,Volcanologist, Hawaiian Volcano Observatory


  • Kilauea's Pu'u O'o-Kupaianaha eruption, which began on January 3, 1983, is already the volcano's longest rift eruption in at least 600 years
  • Lava has destroyed 8 miles of highway and 189
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April 14, 1995

Many of the islands that dot the center of the Pacific Ocean are made up of active, dormant, or extinct volcanoes, whose geologic histories are characteristic of "hot spot" volcanism.

April 7, 1995

April 10th marks the aniversary of the 1926 eruption of Mauna Loa Volcano. The eruption was preceded by several widely felt earthquakes about one hour before the outbreak of lava, and volcanic tremor was recorded on the few seismigraphs installed on the island about a half hour before the felt earthquakes. 

Kīlauea eruption status, May 13, 1994...
March 31, 1995

The 12-year long eruption along Kīlauea's east rift zone continued without interruption during the past two weeks. 

Deep earthquakes and lithospheric flexure...
March 24, 1995

Last Sunday evening, March 19, the Hawaiian Islands were shaken by a moderate earthquake located south of Kahoolawe and west of Hawaii. The earthquake occurred at 10:30 p.m., had a magnitude of 4.5, and was located about 30 miles deep.

Kīlauea eruption status—lava flows moving toward sea...
March 19, 1995

Kīlauea's 12-year-old East Rift Zone eruption continues with lava issuing from vents on the southwest flank of Pu'u 'O'o.

March 10, 1995

The "Volcano Watch" column from January 22, which provided information about earthquake damage from the Kobe earthquake in Japan and then described some ways to reduce damage from future earthquakes here in Hawaii, has generated quite a lively discussion in the "Letters to the Editor" section of the Hawaii Tribune Herald.

March 3, 1995

The U.S. Geological Survey has been working with the JASON Project, which began filming this past Monday in Hawaii Volcanoes National Park, to produce a series of interactive, live, educational broadcasts aimed at classes from upper elementary grades to high school. 

February 24, 1995

I want to thank all of you who came to our first-ever open house this past Monday. The number of people who wanted to see what we do and how we do it was most gratifying. It certainly made sprucing up the Observatory for company worthwhile.

February 17, 1995

The U.S. Geological Survey' Hawaiian Volcano Observatory, National Biological Service, National Park Service, University of Hawaii at Hilo, Kīlauea Military Camp, McDonnell Douglas Aerospace, NASA, and The Planetary Society invite the public to a special "Day in the Park" on Monday, February 20, 1995.

February 5, 1995

From February 13-18, the USGS Hawaiian Volcano Observatory and the National Park Service will host a team of scientists and engineers from NASA, McDonnell Douglas Aerospace and the JASON Foundation for Education at the Kīlauea caldera for a series of tests using a robotic vehicle designed for use on the moon and Mars.

Kīlauea's eruptive history...
February 3, 1995

The current activity along Kīlauea's east rift zone is the longest-lived eruption of Kīlauea in historic times. However, the historic period on Kīlauea dates only to 1790, and the first well-documented eruption took place in 1823.

January 27, 1995

The eruption on Kīlauea's east rift zone has continued without interruption since the last brief pause at the end of November.