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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January 28, 1994

Large, damaging earthquakes have occurred frequently in Hawai`i in the past and will occur again in the future, as we discussed last week. However, there is a great deal you can do to reduce your personal risk.

January 21, 1994

A magnitude-6.6 earthquake devastated the Northridge area of Los Angeles on Monday, January 17, at 4:31 a.m. The extent and type of damage in the Los Angeles region caused by an earthquake of this magnitude has been shocking. 

Eleven years of activity at Kīlauea volcano - part II...
January 14, 1994

Editor's note: The following is part two of an 11-year retrospective look at Kīlauea Volcano - October 1992 through the end of 1993.

January 7, 1994

Editor's note: Today's "Volcano Watch" includes the first half of a 11-year retrospective of the Kīlauea eruption up to October 1992. Next week, the second half will cover the most recent volcanic action at Kīlauea.

December 24, 1993

The snow that fell this past week at the summits of Mauna Kea and Mauna Loa volcanoes reminds us that it can get cold enough to snow, even here in the tropics.

December 23, 1993

The staff and associates of the U.S. Geological Survey's Hawaiian Volcano Observatory extend a warm and cheerful holiday greeting to all of the faithful readers of our column.

December 17, 1993

The National Science Foundation recently supported a scientific drill hole to examine the long-term growth of a Hawaiian volcano. The objective identified by the principal investigators was to drill through as much as possible of Mauna Kea Volcano and determine the variations in the compositions of the lavas over time.

December 10, 1993

The eruption on Kīlauea's East Rift Zone is rapidly approaching another milestone as its 11th anniversary takes place on January 3. This column will feature an extended summary of the eruption, which is by far the most long-lived during historic time.

December 3, 1993

The recent history of Kīlauea has been pieced together from geologic mapping and dating, Hawaiian oral histories, and written observations made following the arrival of Christian missionaries in the 1820s.

November 26, 1993

All of the events that we experience at Kīlauea—eruptions at the summit and on the rift zones, intrusions of magma that don't reach the surface, earthquake swarms that accompany eruptions and intrusion, and the large earthquakes that accompany growth of the volcano and trigger landslides—are responses by the pile of layered lava to the unrelenting pressure of magma rising from below.

November 19, 1993

Ten years ago on November 16, residents of Hawai`i were awakened by an earthquake at 6:13 a.m. The earthquake had a magnitude of 6.6 and was located beneath the Ka`oiki Fault Zone between the summits of Mauna Loa and Kīlauea Volcanoes.

Eruption provides dramatic viewing...
November 13, 1993

The eruption from the episode 51 vents has continued without interruption since October 2. The flows crossed the Chain of Craters Road near Kamoamoa in Hawai`i Volcanoes National Park on November 7, covered part of the archaeological ruins and entered the sea during the evening of November 8.