Unified Interior Regions

California

States L2 Landing Page Tabs

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Simplified map of Long Valley Caldera showing several field stops i...

Long Valley Caldera showing several field stops in blue

Simplified map of Long Valley Caldera showing several field stops in blue.

Horseshoe Lake, Mammoth Mountain, California (Google Earth image) w...

Horseshoe Lake, Mammoth Mountain, CA (Google Earth image) with area...

Horseshoe Lake, Mammoth Mountain, California (Google Earth image) with area of elevated carbon dioxide degassing measurements from 2012 in rainbow colors (highest amount in purple to normal in blue).

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.

Animation shows map of land and sea, land doesn't change and the ocean and bay change colors according to tidal height.
October 2, 2013

San Francisco Bay Basic Tide Model

This compressed data archive contains files that may be used to run a basic depth-averaged (2DH) Deltares (http://www.deltares.nl/en) Delft3D version 4.00.01 astronomic tide model for San Francisco Bay. It was developed with the primary aim of assessing water level fluctuations and flow conditions in the vicinity of

Map showing caldera features and caldera-related hazards at Medicin...

Map showing caldera features and caldera-related hazards at Medicin...

Green line (gas hazard zone limit) indicates elevation contour that defines the closed basin within the caldera, including Medicine Lake. In the event of significant volcanic gas emissions, the gases, which are heavier than air, could accumulate and potentially result in asphyxiation for anyone within the zone. It is likely that warning signs would be posted in such an

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Image of ten minutes of video that highlights the changes in the darkest pixel values in the video.

Sunset State Beach Video Camera 2 Dark Image

Dark image from video camera along Sunset State Beach in Watsonville, CA, looking north. This dark image shows the darkest pixel values throughout a 10-minute video sequence. Learn more about the cameras and how we're using them to study coastal change. [

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Map of the Inyo explosion craters, lava flows.

Map of the Inyo craters, lava flows

Map of the Inyo explosion craters, lava flows, and faults that formed about 600 years ago.

Image: Golden Gate Bridge, California

Golden Gate Bridge, California

The Golden Gate Bridge seen through Racoon Strait in the San Francisco Bay, California.