Images

Map showing location of radar network for the Advanced Quantitative Precipitation Information system in the San Francisco Bay Area.

Map of the study area from the United States-Canada border to the Bering Strait, Alaska. Simulations were carried out in stationary mode for 2,500 sea states over eight two-dimensional (2D) curvilinear and one 2D rectangular domains for a total of nine domains. The offshore extent was roughly defined by the 20-meter isobath.

Scan of coral core, showing yearly growth rates and the density of the coral, which can in turn be used to determine the calcification, or constructive process responsible for reef growth. 

The newly developed USGS Coral Core Archive, housed at the Santa Cruz and St. Petersburg Coastal and Marine Science Centers, contains approximately 500 coral reef cores from U.S. jurisdictions worldwide.

Photo of coral carbonate standards, arranged from high to low density. To convert CT values to real-world densities and quantify the uncertainty in reconstructed density as a result of offsets, a set of carbonate standards are included in every CT scan that represent a range of coral species with different densities.

Coral sample in aluminum tube being prepared for scanning. The use of a secondary aluminum filter reduces beam hardening artifacts (rings) while also avoiding attenuating the x-ray beam.

Animation of a computed tomography scan of a coral core.

Example of the relationship between CT intensities and measured density of the coral standards used to calibrate data. The measured density of the coral standards are compared to the mean intensities of each standard. Linear regressions calculated from the standard values are then used to calibrate data.

Orbicella spp. coral sample with no packing material. Center of image is darker than edges. Transect across image shows intensity values lower in the center creating a cupping effect.

Animation of a computed tomography scan of a coral core.

Map of surface elevation table (SET) locations for a Nisqually, b Snohomish, c Stillaguamish, d Skagit, and e Padilla in Puget Sound, WA, USA.

Bare-earth lidar image of the Nisqually River Delta. Lidar has been used to study and restore the delta, where levees have been removed to reconnect tidal lands.

Two images are provided of the Rocky Creek landslide that resulted in closure of California State Highway 1. The images above show views of the Rocky Creek landslide, California before (Feb. 23, 2024) and after (April 6, 2024) the slope failure. Images show oblique perspectives of the landscape topography colored by the actual colors from the photographs.

An image is provided of the Dolan Point landslide of Big Sur, California during Feb. 23 and April 6, 2024. Images show oblique perspectives of the landscape topography colored by the actual colors from the photographs. All 3-dimensional landscape data derived by USGS photogrammetry techniques. 

Three images are provided of Mud Creek landslide of Big Sur, California during Feb. 23 and April 6, 2024. The first two images show different oblique perspectives of the landscape topography colored by the actual colors from the photographs. The third image shows shaded relief topography of the landscape during Feb.

Three images are provided of Paul’s landslide of Big Sur, California during Feb. 23 and April 6, 2024. The first two images show different oblique perspectives of the landscape topography colored by the actual colors from the photographs.  The third image shows shaded relief topography of the landscape during Feb.

Two images are provided of the Regent’s landslide of Big Sur, California during Feb. 23 and April 6, 2024. The first image shows oblique perspectives of the landscape topography colored by the actual colors from the photographs. The second image shows shaded relief topography of the landscape during Feb.

Two images are provided of the Rocky Creek landslide that resulted in closure of California State Highway 1. The images above show views of the Rocky Creek landslide, California before (Feb. 23, 2024) and after (April 6, 2024) the slope failure. Images show oblique perspectives of the landscape topography colored by the actual colors from the photographs.

An image is provided of the Willow Creek landslide of Big Sur, California during Feb. 23 and April 6, 2024. Images show oblique perspectives of the landscape topography colored by the actual colors from the photographs. All 3-dimensional landscape data derived by USGS photogrammetry techniques. 

One image is provided of a landslide near the Monterey-San Luis Obispo County line of Big Sur, California during Feb. 23 and April 6, 2024. The image shows shaded relief topography of the landscape during Feb. 23 and April 6, 2024, and the total topographic change between these dates, which shows both erosion (red) and accretion (blue) of the landscape.

Three images are provided of Mud Creek landslide of Big Sur, California during Feb. 23 and April 6, 2024. The first two images show different oblique perspectives of the landscape topography colored by the actual colors from the photographs. The third image shows shaded relief topography of the landscape during Feb.