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 2, 1994

The nearly 12-year-long eruption along Kīlauea's east rift zone took another brief vacation this past week. This was the sixth pause in eruptive activity this year, and the third since the beginning of October.

November 25, 1994

Mount Merapi, a 2,911-meter-tall volcano on the island of Java in Indonesia, erupted on November 22 at about 10:15 a.m. local time.

Location of selected earthquakes greater than magnitude 6, Island of Hawai‘i.
November 18, 1994

Eleven years ago on November 16, residents of Hawaii were awakened by a strong earthquake at 6:13 a.m. The earthquake had a magnitude of 6.6 and was located beneath the Kaoiki Fault Zone between the summits of Mauna Loa and Kīlauea Volcanoes. 

November 11, 1994

The eruption along Kīlauea's east rift zone is approaching its twelfth anniversary, now less than two months away. The eruption continues strongly, with magma replenishment beneath the summit roughly matching eruption rates.

November 4, 1994

Beginning on October 21 and continuing through October 31, residents in parts of lower Puna have felt a sequence of small earthquakes. 

October 28, 1994

The nearly twelve-year-long eruption on Kīlauea's east rift zone had at least one additional pause in activity this past week.

October 21, 1994

Not only does Hawaii move up and down, as I described last week, it also moves horizontally. There are several ways to measure these movements, and a new, exciting technique has recently been added to the repertoire.

October 14, 1994

There is abundant evidence that the island of Hawaii is sinking, and that different parts of the island sink, or subside, at different rates and for different reasons. At any location, the net subsidence is the sum of these different types of subsidence and any change in global sea level.

October 7, 1994

The nearly 12-year-long eruption on Kīlauea's east rift zone took a short vacation this past week. No lavaerupted between Wednesday morning and Thursday afternoon, when lava once again reoccupied the same tube to the western ocean entry at Laeapuki and a small channelized 'a'a flow broke out of the tube in the center of the flow field above Kamoamoa. 

September 30, 1994

In Hawaii, the U.S. Geological Survey's (USGS) Hawaiian Volcano Observatory (HVO) is known for its work in Hawaiian volcano monitoring and hazards assessment and in conveying information to the public and to other government agencies.

September 23, 1994

Rabaul caldera, an active volcano located on the northern tip of New Britain island in Papua New Guinea, erupted violently this past week.

September 16, 1994

The Hawaiian Volcano Observatory is located on the northwest rim of Kīlauea caldera adjacent to the Jagger Museum. Because of its location within Hawaii Volcanoes National Park, many people have the mistaken impression that the Observatory is administered by the National Park Service.