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Image: Pancaked Upper Deck of Cypress viaduct
October 17, 1989

Pancaked Upper Deck of Cypress viaduct

Pancaked upper deck, Cypress viaduct. Guard rail at right is on lower deck.

Image: Aerial View of Collapsed Tower
October 17, 1989

Aerial View of Collapsed Tower

Aerial view of collapsed five-story tower, St. Joseph's Seminary, California.

Image: Extensional Cracks in Spillway
October 17, 1989

Extensional Cracks in Spillway

Prominent N. 15 W.-trending extensional cracks up to 12 cm (4.7 in.) wide in concrete spillway to Austrian Dam, north abutment.

Image: Rescue Efforts
October 17, 1989

Rescue Efforts

Rescue efforts, Pacific Garden Mall.

Image: Broken Utility Lines
October 17, 1989

Broken Utility Lines

Broken utility lines in house that shifted off its foundation, downtown Watsonville.

Image: Car Crushed Under Building
October 17, 1989

Car Crushed Under Building

An automobile lies crushed under the third story of this apartment building in the Marina District. The ground levels are no longer visible because of structural failure and sinking due to liquefaction.

Image: Sheared Reinforcement Bar
October 17, 1989

Sheared Reinforcement Bar

Sheared reinforcement bar, Cypress viaduct.

Pahoa Island in Mono Lake, California.
December 31, 1987

Pahoa Island in Mono Lake, CA.

This aerial view toward the south shows the northeastern side of Paoha Island in Mono Lake, California; the Mono Craters and Sierra Nevada are in the far distance. The north (bottom of photo) and east (left side of island) tips of the island consist of craters and lava flows that may have erupted as recently as A.D. 1720-1850.

Negit Island in Mono Lake, California....
December 31, 1987

Negit Island in Mono Lake, CA.

This high aerial view of Negit Island is toward the southwest. Three separate vents each erupted individual dacite lava flows to form three parallel elongate flows. The vents are located on the highest parts of the flows. The northwest edge of Paoha Island is visible in upper left.

Bishop Tuff formed from the eruption that created the Long Valley C...
October 29, 1987

Bishop Tuff formed from eruption that created the Long Valley Caldera

This outcrop is exposed in a rock quarry in Chalfant Valley about 25 km (15 mi) southwest of Long Valley Caldera. The two main units of the Bishop Tuff deposit are visible here: (1) the lower 5 m (16 f) of the section consists of the pumice that fell to the ground (airfall pumice) downwind from the eruption; and (2) the upper 5-6 m (16-20 f) of the section consists of the

...
Aerial view of Inyo Craters, CA.
December 31, 1984

Inyo Craters, part of the Mono-Inyo Chain, Long Valley region, Ca

Inyo Craters, part of the Mono-Inyo Chain, Long Valley region, California.

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USGS
April 15, 1997

Peat soils in the Sacramento-San Joaquin Delta and their relationship to water quality; the history and consequences of long-term groundwater use in the Mojave Desert; the hydrology, biology and geology of San Francisco Bay; 

USGS
April 15, 1997

Dr. Gordon Eaton, the national director of the U.S. Geological Survey in Reston, Va., will be one of the speakers at the Friday, April 18, 1997 dedication of Placer Hall on the California State University at Sacramento campus.

USGS
April 15, 1997

The presence of the U.S. Geological Survey in Placer Hall on the campus of California State University at Sacramento marks the latest chapter in the USGS’s long association with the study of earth sciences in California and cooperation with the state’s Division of Mines and Geology and its higher education system.

USGS
April 15, 1997

Methyl tert-butyl ether (MTBE) and its potential effects on air and water quality were the focus of a session Wed. and Thurs, April 16-17, 1997, at the American Chemical Society annual meeting in San Francisco, California. U.S. Geological Survey scientists will report on several studies of the occurrence and distribution of this compound in surface water and ground water during the session.

USGS
April 15, 1997

Methyl tert-butyl ether (MTBE) in the nation’s ground waters and surface waters will be the subject of papers and poster presentations by U.S. Geological Survey scientists at the American Chemical Society annual meeting, April 16-17, in San Francisco, Calif.

USGS
April 10, 1997

U.S. Geological Survey scientists are encouraged because they now know that they have the capability to explain the blind thrust faults of the Los Angeles region with seismic reflection methods, according to USGS researcher Dr. Rufus Catchings. 

USGS
March 17, 1997

A cooperative agreement with the University of Southern California (USC) for the operation of the Southern California Earthquake Center has been renewed by the U.S. Geological Survey.

USGS
February 18, 1997

LECTURE: -- "LIVING WITH GEOLOGIC HAZARDS IN SAN MATEO COUNTY" WILL BE THE SUBJECT OF THE NEXT U.S. GEOLOGICAL SURVEY’S FREE PUBLIC LECTURE.

USGS
February 13, 1997

"There is mounting evidence that Mars is a water-rich planet that may have experienced warmer climates, and therefore, life, in the past,"according to Michael Carr, an astrogeologist with the U.S.Geological Survey in Menlo Park, Calif.

USGS
January 19, 1997

LECTURE: -- "THE COLORADO RIVER IN THE GRAND CANYON" WILL BE THE SUBJECT OF THE NEXT U.S. GEOLOGICAL SURVEY’S FREE PUBLIC LECTURE.

USGS
January 8, 1997

Hydrologists and chemists from the U.S. Geological Survey will be on Mallard Island, near Pittsburg today, Jan. 8, collecting water and sediment samples from Bay-Delta waters to determine the amount of pesticides that are being washed into the Bay by this year’s floods on Bay-Delta rivers.

USGS
January 3, 1997

The floods have crested and are beginning to recede in most places in the Pacific Northwest. Nevertheless dozens of U.S. Geological Survey personnel, who were busy over the holidays measuring the high streamflows and keeping river stage monitors operating, are still busy in the field and in their offices. Field crews have been hampered by mudslides, road closures, and extremely dangerous condition