Images

Updated in 2024, this index map of the U.S. Cascadia margin shows where data have been collected since 2018 as part of the Subduction Zone Marine Geohazards Project.

Map showing location of major faults and offshore basins of the San Francisco area, from the study Vertical tectonic deformation associated with the San Andreas fault zone offshore of San Francisco, California.

Regional map of southern California showing the study region from Dana Point to La Jolla Cove.

Examples of invasive species likely to leave a fossil record: a, Asian clams at Teddington Lock on the River Thames, UK; b, Asian clams in the River Soar, Leicestershire, UK; c, quagga mussels revealed on the rocks lining Grafham Water reservoir, UK, during low water levels.; d, zebra mussels on a native freshwater clam in Manitoba, Canada; e, Himalayan balsam along

Late 20th and 21st century production of avocados, coconuts, mangos, peach, walnut, palm kernels, snails and medium-density fiberboard.

A USGS researcher in a kayak tows instruments to measure water level and suspended-sediment concentration in Whale's Tail South marsh, San Francisco Bay, CA.

Aerial orthomosaic photo of Whale's Tail Marsh south (WTMS) in May 2022 with marsh-edge boundary drawn in orange at elevation of the scarp head contour.

Restored tidal marsh at the Nisqually River Delta within Billy Frank Jr. National Wildlife Refuge, Washington.

A whimbrel (a large shorebird) consuming a burrowing shrimp in an intertidal area.

Sampling sites are color-coded by habitat. White labels indicate site names. Marsh sites: U1, Unit 1; U2, Unit 2; U3, Unit 3; U4, Unit 4; M, Madrone; P1, Phase 1 restoration; P2, Phase 2 restoration; RF, reference. For Marsh sites, the last letter indicates the position along a tidal channel: N, north; M, middle; S, south; W, west.

A semipalmated plover (a small shorebird) consuming a polychaete worm in an intertidal area.

Screenshot of CoastSeg interface, from the study CoastSeg: an accessible and extendable hub for satellite-derived-shoreline (SDS) detection and mapping.

Satellite-derived shorelines for a barrier island east of Moses Point Fishing Village, Norton Sound, Alaska, from the study CoastSeg: an accessible and extendable hub for satellite-derived-shoreline (SDS) detection and mapping.

Satellite images of barrier island near Moses Point Fishing Village, Norton Sound, Alaska, taken in 1986 and 2023.

Schematic of the trace metal inputs in a potential deep-sea mining dewatering waste plume and accidental spills from both the riser pipe and the mining platform. The section plot is dissolved oxygen concentrations along 12° N. Dissolved oxygen data are retrieved from the World Ocean Atlas 2018 annual climatology, and the gray contours are oxygen concentrations.

Regional land area/bathymetric map including submarine landslides, headwall scarps, and mass wasting zones compiled and mapped offshore of southern California for the study A comprehensive assessment of submarine landslides and mass wasting processes offshore southern California.

San Nicolas slide.

Map showing aftershock zones of great Aleutian Islands, Alaska, earthquakes in the 20th century. Red solid line with pink fill indicates aftershock zone of the 1957 Aleutian Islands earthquake from Sykes et al.

Animated GIF of a simulation of the Aleutian Islands, Alaska 1957 magnitude 8.6 tsunami.

Cover image for flyover and timelapse at the Elwha River Mouth on the Olympic Peninsula in Washington.

Cover image for timelapse at Lower Lake Mills from Glines Canyon Dam, Elwha River, on the Olympic Peninsula in Washington.