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Data produced by USGS Pacific Coastal and Marine Science Center and USGS Coastal and Marine Hazards and Resources Program

Filter Total Items: 337

Bathymetric change analysis in San Francisco Bay, California, from 1971 to 2020

This data release supersedes version 1.0, published in April 2023 at Versioning details are documented in the accompanying SFBay_BathyChange_VersionHistory.txt file.  This data release provides bathymetric change grids of four geographic areas of San Francisco Bay, California, comparing digital elevation models (DEMs) created from bathymetric data collected in the

Sediment core data collected from Cargill Marsh, South San Francisco Bay, California during field activities 2022-643-FA and 2023-681-FA

The U.S. Geological Survey Pacific Coastal and Marine Science Center collected cores in the Cargill Marsh section of Whales Tail South Marsh in Eden Landing Ecological Reserve in Alameda County, California in 2022 and 2023. This data release includes photographs, computed tomography (CT) scans, and radiometric data. Details on core locations and measured variables are included in sections for each

Geochemistry of ferromanganese crusts, nodules, and hydrothermally altered rocks from the Arctic Ocean

Ferromanganese crusts, nodules, and hydrothermally altered rocks were collected via dredge within the Amerasia Basin in the Arctic Ocean during USCGC icebreaker Healy cruises HLY0805, HLY0905, and HLY1202 in 2008, 2009, and 2012 respectively. Dredged samples were donated and sent to USGS for subsampling and major and trace element geochemical analyses. Major and trace element data as well as locat

Seismic sub-bottom, sediment core and radiocarbon data collected in Ozette Lake, Washington from 2019-2021

Seismic-reflection data and cores were collected in Ozette Lake, Washington, from 2019 to 2021. These data were used to investigate submarine landslide deposits triggered by large Cascadia Subduction Zone earthquakes. Identification of fault-related submarine hazards is a primary mission of the USGS Coastal and Marine Geology Program. In the US Pacific Northwest region, the greatest earthquake and

Bathymetry and acoustic-backscatter data for Ozette Lake, Washington collected during USGS field activity 2019-622-FA

2-m resolution bathymetry and acoustic backscatter data were collected during a July 2019 SWATHPlus survey of Ozette Lake, Washington. Data were collected and processed by the U.S. Geological Survey (USGS), Pacific Coastal and Marine Science Center (PCMSC) with fieldwork activity number 2019-622-FA. The 2-m data are provided as GeoTIFF images.

Future coastal groundwater hazards in the Puget Sound region, Washington, U.S.A.

This data release contains model results for groundwater response to sea-level rise (SLR) in coastal areas around Puget Sound, Washington. The high resolution (50m) models predict steady-state unconfined groundwater heads under long-term (17y) average recharge conditions, with spatially variable hydraulic conductivities (Ks) from published models, and include model runs with Ks increased and decre

Underwater photogrammetry products of Big Pine Ledge, Florida from images acquired using the SQUID-5 system in July 2021

Underwater images were collected using a towed-surface vehicle with multiple downward-looking underwater cameras developed by the U.S. Geological Survey (USGS). The system is named the Structure-from-Motion (SfM) Quantitative Underwater Imaging Device with Five Cameras (SQUID-5). The raw images and associated navigation data were collected at Big Pine Ledge, a coral reef located within the Florida

Radiocarbon age dating of biological material from cores collected off British Columbia, Canada and southeastern Alaska, U.S. along the Queen Charlotte-Fairweather fault zone

Results of radiocarbon age dating of planktic foraminifera, benthic foraminifera, and pelecypod shell fragments collected from piston cores, trigger weight cores, and IKU grab samples obtained in 2015 and 2017 offshore British Columbia, Canada and southeastern Alaska, U.S. along the Queen Charlotte-Fairweather fault zone.

Tsunami deposit data and sediment transport models from the Salmon River estuary, central Oregon

This data release contains sedimentological data and numerical models representing the circa 1700 CE tsunami in the Salmon River estuary, Oregon. The thickness of sandy tsunami deposits was identified in hundreds of cores that map the extent of the deposit throughout the estuary. Grainsize data demonstrate the inland fining of the sandy tsunami deposits. The distribution of tsunami deposits was us

Multichannel minisparker and chirp seismic reflection data collected during USGS field activity 2021-614-FA along the Palos Verdes Fault Zone

High-resolution multichannel seismic (MCS) and coincident Chirp sub-bottom data were acquired during USGS field activity 2021-614-FA aboard the R/V Sproul in May of 2021. The survey was conducted in the offshore region of southern California, specifically in the inner continental borderlands tectonic region. The focus of the survey was to collect seismic lines perpendicular to the Palos Verdes Fau

Computed Tomography (CT) scans of sediment cores collected from Montague Island, AK

This data release contains Computed Tomography (CT) scan images of sediment cores collected from Montague Island, in Prince William Sound, Alaska. Sediment cores were collected from lagoons uplifted >3 m in the 1964 earthquake along the coast of Montague Island and aid in interpreting changes in deposition environment over the past several thousand years, which may record evidence for past episode

Sediment core data from offshore southern Cascadia during field activity 2019-643-FA

This data release contains sediment core data including core imagery, multi-sensor core logger (MSCL) data, and radiocarbon age data. Sediment cores were collected offshore northern California during U.S. Geological Survey cruise 2019-643-FA aboard the M/V Bold-Horizon. The cores were collected along with geophysical data to evaluate potential hazards (e.g., active fault systems, slope instabiliti