Images

The Digital Shoreline Analysis System (DSAS) version 6 is a standalone application that calculates shoreline or boundary change over time. The GIS of a user’s choice is used to prepare the data for DSAS.  Like previous versions, DSAS v.6 enables a user to calculate rate-of-change statistics from multiple historical shoreline positions.

Map of the Columbia River Littoral Cell showing validation sites where beach profile surveys (white dots) have been conducted. The labels of some of the transects at the edge of each subcell are displayed.

Black and white images show damage caused by the 1964 earthquake and tsunami in Valdez, Alaska.

The images above show views of the Mud Creek landslide, California before (June 8, 2023) and after (Feb. 23, 2024) the 2024 winter season. Images show shaded-relief views of the 3-dimensional landscape data derived by USGS photogrammetry techniques.

Images show the same views of the Mud Creek landslide, California before and after the winter 2024 season. Vertical change shows both erosion (red) and accretion (blue), which reveals changes to the landscape.

Map indicating the location of Loki's Castle Vent Field (LCVF; red dot) near the intersection of the Mohns and Knipovich ridges and (b) the location of the push cores in relation to the east and west mounds.

Photographs, CT scans and stereomicroscope images of cores ROV22PC01 (a) and ROV22PC04 (b) illustrating the discrimination between sediments which were accumulated dominantly through mass wasting (a) and sediments accumulated through plume fallout (b).

Color maps showing output examples of the Simulating Waves Nearshore (SWAN) model and how 1 of the 999 wave conditions was dynamically downscaled to the 200-meter (m) grid scale offshore West Maui, Hawaiʻi. A, The 5-kilometer (km) resolution Hawaiian Chain model. B, The 1-km resolution Maui Nui model embedded in the Hawaiian Chain model.

Animated GIF of a clamshell dredge in operation in San Francisco Bay, California, as part of the Shallow Water Strategic Placement Pilot Project.

Mud Creek slide seen from the air on February 22 2024, as part of USGS remote sensing data to track Big Sur landslides in 2024.

Cover image for sediment core lab video, showing core-lab walk-in refrigerator at the Pacific Coastal and Marine Science Center.

Photo of a delta smelt being measured during a fish survey. The delta smelt is a federally endangered fish species found only in turbid waters of the San Francisco Estuary. 

Illustration showing written physics equations blended with a photograph of Delta smelt.

Aerial photo of Sacramento-San Joaquin River Delta, which covers 1,100 square miles and provides water to the San Francisco Bay Area and coastal and southern California and supports dozens of legally protected fish, plant and animal species.

Satellite derived coastlines in western Alaska, collected as part of the USGS Typhoon Merbok Disaster Emergency Recovery Efforts.

Map search display filtered to show recently added three-dimensional (3D) surveys, acquired between 1996 and 1998 within the Gulf of America. These surveys were permitted over 25 years ago and are therefore eligible for public release. The Bureau of Ocean Energy Management protraction areas are labeled.

Perspective view of horizon mapping and fault attribute detection on two combined three-dimensional (3D) volumes located in the Santa Barbara Channel, offshore southern California. The horizons show various marker beds mapped throughout the volumes, providing insights into the 3D deformation patterns.

Donya Frank-Gilchrist (SPCMSC) manages the USGS booth at the recent SCDRP annual meeting to share USGS data and tools with community resilience partners and stakeholders.

Aerial view of Ucluelet, Vancouver Island, British Columbia, showing coastal mountains along the Queen Charlotte Fault zone.

Subsidence area exposure for counties on the US east coast. A) Percentage of county’s land area affected by VLM < 0 mm per year. B) Percentage of county’s land area affected by VLM < −1 mm per year. C) Percentage of county’s land area affected by VLM < −2 mm per year. D) Percentage of county’s land area affected by VLM < −3 mm per year.

Diagram of glaciation and glaciovolcanism at Milbanke Sound, from the study "Where ice gave way to fire: deglacial volcanic activity at the edge of the Coast Mountains in Milbanke Sound, BC".