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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December 22, 1995

The staff and associates of the U.S. Geological Survey's Hawaiian Volcano Observatory (HVO) extend a warm and hearty holiday greeting to all of the faithful readers of this column.

December 8, 1995

With the return of kona winds during the past few weeks, east Hawaii has been experiencing poor air quality, caused by the volcanic fume from the ongoing eruption on Kīlauea Volcano's East Rift Zone.

December 1, 1995

The superintendent for the parks maintenance division of the Hawaii County Parks and Recreation Department recently called the U.S. Geological Survey's Hawaiian Volcano Observatory to inquire about a possible source of cinder/ash mixture similar to that found at Kapoho Cone.

November 24, 1995

Wednesday, November 29, marks the 20th anniversary of the 1975 Kalapana earthquake, the largest earthquake to strike Hawaii since 1868. Residents were awakened at 3:35 a.m. by a magnitude-5.7 earthquake located a few miles inland of Lae'apuki on Kīlauea's south coast. 

November 17, 1995

The U.S. Geological Survey's Hawaiian Volcano Observatory is closed due to the general shutdown of the U.S. government.

November 5, 1995

Seismology, the science of earthquakes and the mechanical properties of the Earth, is the primary method used to monitor the volcanoes of Hawaii and elsewhere.

October 27, 1995

On November 5, 1880, 115 years ago this week, an eruption began on Mauna Loa's northeast rift zone that would eventually send lava closer to Hilo Bay than any other in over a thousand years.

Kīlauea lava status; shoreline hazard...
October 20, 1995

The eruption on Kīlauea's East Rift Zone continued without any pauses this past week. The active flows are confined to the eastern side of the Kamoamoa flow field, and most of the lava is entering the ocean near Kamokuna.

October 13, 1995

During the past few weeks, we took a break from writing about Kīlauea's East Rift Zone eruption to explore the geological history of the main Hawaiian Islands and to bring you up-to-date on the eruption at Ruapehu Volcano in New Zealand.

September 29, 1995

In the last few weeks, we have reviewed the eruptive stages of Hawaiian volcanoes and have given brief overviews of the geologic history of Hawai'i Island and of Maui, Moloka'i, Lana'i, and Kaho'olawe, the islands that make up the Maui Complex.

September 23, 1995

Last week, we presented a brief history of the island of Hawaii, the largest island in the Hawaiian chain. However, before the island of Hawaii formed, Maui Nui was an even larger island. 

September 15, 1995

The Island of Hawai'i consists of five coalesced volcanoes, a submarine volcano that has already subsided below sea level, and another, Lō‘ihi Seamount, that has yet to grow to sea level.