Unified Interior Regions


The Southwest Region includes California, Nevada, and Arizona. The Regional Office, headquartered in Sacramento, provides Center oversight and support, facilitates internal and external collaborations, and works to further USGS strategic science directions.

States L2 Landing Page Tabs

Filter Total Items: 1,108
View from the sky of a city and its waterfront with various ships docked, and most buildings on land are ruined.
May 28, 1906

San Francisco in ruins, 1906

One of the most well-known photographs by George R. Lawrence, taken May 28, 1906, about 6 weeks after the Great San Francisco earthquake which occurred on April 18. The 160-degree panorama was taken from a camera suspended from a kite 2,000 feet in the air. The view looks up Market Street with the waterfront and Union Ferry Building in the foreground.

This media

Mount Konocti viewed from Cinder Cone, Clear Lake Volcanic Field.
December 31, 1905

Mount Konocti viewed from Cinder Cone, Clear Lake Volcanic Field.

Mount Konocti, the most distinct volcanic feature of the Clear Lake Volcanics as viewed to the west from Cinder Cone.

old black and white photo of collapsed building, with inset image of the building before collapse
December 31, 1868

Alameda County Courthouse (Calif.) before and after 1868 Earthquake

Strong shaking during the 1868 Hayward Fault earthquake caused the second story of the Alameda County Courthouse in San Leandro to collapse (photo courtesy of the Bancroft Library, University of California). The inset photo shows the courthouse before the quake

A view from atop a coastal bluff looking at a sandy beach, waves, and ocean.

Sunset Beach Camera 2 Timex

Video camera timex (time-exposure) image at Sunset State Beach in Watsonville, California, looking north. Learn more about the cameras and how we're using them to study coastal change.

Image of a beach made by stacking many video frames together, to give a sense of change in a static image.

Santa Cruz Cowells Beach video camera dark image

Video camera dark image at Cowells Beach in Santa Cruz, California, looking southward. Learn more about the cameras and how we're using them to study coastal change.

August 3, 2021

Aggregates Data by State, Type, and End Use; 1971–2018

This data set contains supplemental aggregates data for the USGS Minerals Yearbook Volume II—Area Reports: Domestic. It contains data for the years 1971 through 2018 and replaces the discrete construction aggregate tables that were included in the individual State chapters prior to 2014. It contains

Black and white outline of snake coiled up on a duck nest, with its mouth around an egg
June 20, 2019

Coloring Sheet: Gopher Snake Attempts to Eat a Duck Egg

A PDF copy of a coloring sheet showing a gopher snake attempting to eat a duck egg in a nest, based on an image taken in Suisun Marsh, California.

Santa Cruz Main Beach, El Nino

Photographs are of the Santa Cruz Main Beach before and after the December 11, 2014, “Super Soaker” storm that brought 2.5 inches of rain in just a few hours to Santa Cruz and 9 inches to Boulder Creek, along with big waves and swell. While the human eye may notice changes to the beach, ground-based lidar can create surface maps of precise elevation changes over time.