Unified Interior Regions

California

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Image: Liquefaction in Deposits of River
October 17, 1989

Liquefaction in Deposits of River

Liquefaction in recent deposits of San Lorenzo River caused cracking and differential settling of river levee southeast of Riverside Avenue Bridge. Bridge piers and the north abutment area were also damaged by liquefaction.

Image: Support Column of Bridge
October 17, 1989

Support Column of Bridge

Support column of bridge across Struve Slough, Highway 1. Enlargement of hole where support enters the ground is an effect of lateral shaking, which caused the concrete to break up where the column joined the bridge and was instrumental in the roadbed collapse.

Image: Aerial View of Highway
October 17, 1989

Aerial View of Highway

Aerial view of collapsed sections of the Cypress viaduct of Interstate Highway 880.

Image: Head Scarp of Small Slide
October 17, 1989

Head Scarp of Small Slide

Head scarp of small slide at Redondo Beach. Scale is provided by the red-handled rock hammer, which is 30.5 cm (12 in.) long.

Image: Messages at Emergency Center
October 17, 1989

Messages at Emergency Center

Personal messages posted on van at Emergency Center.

Image: Landslide Debris on Highway
October 17, 1989

Landslide Debris on Highway

Landslide debris blocks both eastbound lanes of Highway 17 near Summit Road.

Image: Landslide-Displaced Trees
October 17, 1989

Landslide-Displaced Trees

Landslide-displaced trees reflect earthquake-triggered slope failure along coastal bluff, New Brighton Beach area, Santa Cruz County.

Image: Fructure Cuts Roadbed
October 17, 1989

Fructure Cuts Roadbed

A fracture cuts the roadbed, curbs, and railings on the collapsed section of Highway 1 at Struve Slough.

Image: Aerial View of Highway
October 17, 1989

Aerial View of Highway

Aerial view of collapsed sections of the Cypress viaduct of Interstate Highway 880.

Image: Aerial View of Large Slides
October 17, 1989

Aerial View of Large Slides

Aerial view of large slides north of Fort Funston. A ground perspective of this slide is shown in photo 33.

Image: Car Crushed by Brick
October 17, 1989

Car Crushed by Brick

Vehicle crushed by collapse of unreinforced-brick masonry.

Image: Landslide Debris on Highway
October 17, 1989

Landslide Debris on Highway

Landslide debris blocks both eastbound lanes of Highway 17 near Summit Road. Foreground material is damaged lane separators.

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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

USGS
December 18, 1996

The good news is that sea water and wave action aren’t being too rough on some sections of the beach cliffs of the San Mateo County, Calif., coast; the bad news is that slumping caused by fresh water erosion is destroying some of the beach cliffs at rates of up to two meters per year, according to scientists with the U.S. Geological Survey in Menlo Park, Calif.

USGS
December 16, 1996

A new method of assessing the danger of ground failure due to soil liquefaction during an earthquake made its debut in San Francisco, Tuesday afternoon, December 17.

USGS
December 13, 1996

"Secrets in Stone," a video that chronicles the series of scientific discoveries in the early 1960s that led to broad acceptance of the theory of plate tectonics, will be shown for the first time on Tuesday, December 17, 1996, at the annual meeting of the American Geophysical Union (AGU) in San Francisco. The premiere showing will be held at 4:30 p.m., in Room 122 of the Moscone Center.

USGS
September 27, 1996

Dr. Crofton B. Farmer of Pasadena, California, and Dr. M. Patrick McCormick of Hampton, Virginia, have received the 1996 Pecora Award, one of the top federal awards for contributions in remote sensing. 

USGS
November 8, 1995

Where in the United States are Carmen and San Diego? Now, you can get fast and accurate information on the Internet about Carmen, San Diego, and almost 2 million other domestic geographic names, via the new World Wide Web site for the U.S. Geological Survey’s Geographic Names Information System.

USGS
October 2, 1995

Land subsidence, a potential geological hazard throughout most of California’s valleys, is the subject of a two-day symposium in Sacramento, Calif., that will honor one of the pioneers in California geology and groundwater studies.

USGS
October 2, 1995

Joseph F. Poland, whose memory will be honored with a special symposium at this year’s annual meeting of the Association of Engineering Geologists and the Groundwater Resources Association of California in Sacramento, Calif., Oct. 2-8, was a pioneer in the field of engineering geology and one of the world’s leading scientists associated with the United States Geological Survey.